Promethease Report

23andMe reports that the A allele of rs3918290 is associated with the rare recessive disorder dihydropyrimidine dehydrogenase deficiency (DPD), also known as hereditary thymine-uraciluria or familial pyrimidinemia. Note that the terms used in the literature for this gene can be confusing, since the gene is in reverse orientation to the chromosome strand on the reference genome. pharmgkb - defines *2A allele, which has a significantly higher chance of 5-fluorouracil toxicity Fluorouracil Toxicity [PharmGKB:In-Depth Heterozygosity for the A allele of this SNP is associated with mucositis and leukopenia drug toxicity in cancer patients treated with fluorouracil. Heterozygous males were more likely than heterozygous females to develop severe toxicity. In this study, no A/A homozygotes were ob...

rs1127354 (Pro32Thr/P32T, 94C>A) is a SNP within the ITPA (Inosine triphosphate pyrophosphatase) gene. (note: rs1127354 supersedes rs41320251) abolishes ITPA activity in homozygous individuals and reduces the activity to 25% in heterozygous subjects, mercaptopurine metabolism (sig. higher methyl mercaptopurine nucleotides levels + higher probability of severe febrile neutropenia in A carriers treated with mercaptopurine) Mutations in the gene encoding the Wnt-signaling component R-spondin 4 (RSPO4) cause autosomal recessive anonychia. Pharmacogenomic studies of the anticancer and immunosuppressive thiopurines mercaptopurine and azathioprine. Investigation of candidate polymorphisms and disease activity in rheumatoid arthritis patients on methotrexate. Variants in the ITPA gene protect a...

rs1142345 is a SNP in the TPMT gene, potentially encoding a variant incapable of detoxifying byproducts of certain antineoplastic and immunosuppressant drugs. In general, individuals must have two nonfunctioning TPMT alleles for the toxicity to be pronounced. The risk allele for this SNP is rs1142345(G), and when it is the only variant in the TPMT gene, it encodes the TPMT*3C allele. While still rare, it is more common in African-Americans (2.4% of all alleles) than in Caucasians. Note that if the same allele also carries the rs1800460(A) SNP, the allele is actually a TPMT*3A allele (OMIM). The medicine 6-Mercaptopurine is metabolized by TPMT. Individual differences in TPMT activity associated with this SNP are now used to determine appropriate dosage range and interval for treatment. 23an...

rs1800584 is a rare SNP in the TPMT gene, potentially encoding a variant incapable of detoxifying byproducts of certain antineoplastic and immunosuppressant drugs. In general, individuals must have two nonfunctioning TPMT alleles for the toxicity to be pronounced. The rs1800584(A) SNP defines the TPMT*4A allele (OMIM). wikipedia thiopurine drugs metabolized by TPMT include azathioprine, mercaptopurine, and thioguanine [PharmGKB:In-Depth This splicing variant results in very low TPMT activity and risk for hematologic toxicity as a result of treatment with thiopurines.]

rs1800460 is a SNP in the TPMT gene, potentially encoding a variant incapable of detoxifying byproducts of certain antineoplastic and immunosuppressant drugs. In general, individuals must have two nonfunctioning TPMT alleles for the toxicity to be pronounced. The risk allele for this SNP is rs1800460(A), and when it is the only variation in the TPMT gene, it encodes the TPMT*3B allele. While still rare, it is more common in Caucasians (4.5% of all alleles) than in African-Americans (0.8%). Note that if the same allele also carries the rs1142345(G) SNP, the allele is actually a TPMT*3A allele (OMIM). The medicine 6-Mercaptopurine is metabolized by TPMT. Individual differences in TPMT activity associated with this SNP are now used to determine appropriate dosage range and interval for treatm...

rs1800462, also known as A80P, is a rare SNP in the TPMT gene, potentially encoding a variant incapable of detoxifying byproducts of certain antineoplastic and immunosuppressant drugs. In general, individuals must have two nonfunctioning TPMT alleles for the toxicity to be pronounced. The risk allele for this SNP (in orientation to the dbSNP entry) is rs1800462(C), and it encodes the TPMT*2 allele. It may occur at a frequency of 1 in 200 alleles among Caucasians. wikipedia thiopurine drugs metabolized by TPMT include azathioprine, mercaptopurine, and thioguanine [PharmGKB:In-Depth The TPMT:238G>C SNP was cloned from a patient with severe mercaptopurine toxicity. It results in a non-synonymous protein change TPMT:Ala80Pro that has a 100-fold reduction in catalytic activity compared to w...

rs2395029 is a SNP in the major histocompatibility complex (MHC) region, and several studies have shown that the rs2395029(G) allele is 99.9% predictive of the presence of an HLA-B*5701 allele. This HLA allele, in turn, has been associated with several conditions. A study of 51 cases of flucloxacillin drug-induced liver injury (DILI), an important cause of serious liver disease, along with a replication study of another 23 cases, found that the rs2395029(G) carriers were at highly increased risk (odds ratio 80, p=8.7x10(-33)). * see also: 23andMe blog rs2395029(G;G) increases the odds of drug-induced liver injury in response to flucloxacillin by 45x This SNP is thought to be involved in determining the HIV viral load set point during the asymptomatic period of infection. This SNP is estima...

After taking Acetaminophen (Tylenol®), rs1467558(A;G) individuals have higher alanine aminotransferase (ALT) levels, a sign of liver toxicity, than do (G;G) homozygotes. More studies are needed; there was only 1 (A;A) individual, and he didn't show elevated ALT levels; furthermore, the ALT increases were 'modest' anyway for (A;G) individuals compared to (G;G). see also: 23andMe blog '''Note:''' the orientation of this SNP in SNPedia is as detailed in dbSNP, but in publications (including 23andMe's blog) the orientation is 'flipped', so what's (A;A) in dbSNP is (T;T) as discussed by the 23andMe blog.

rs2235015 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs2032583 is near 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. rs2235015 has an r² value of >0.5 with this group. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported ...

rs2032583 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs2032583 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

rs4148740 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs4148740 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

rs11983225 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs11983225 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are kn...

rs12720067 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs12720067 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are kn...

rs2235040 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs2235040 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

rs2235067 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs2235067 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

rs4148739 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs4148739 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

rs10248420 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs10248420 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are kn...

rs7787082 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs7787082 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

rs2235015 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs2032583 is near 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. rs2235015 has an r² value of >0.5 with this group. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported ...

rs2032583 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs2032583 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

rs4148740 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs4148740 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

rs11983225 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs11983225 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are kn...

rs12720067 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs12720067 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are kn...

rs2235040 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs2235040 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

rs2235067 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs2235067 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

rs4148739 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs4148739 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

rs10248420 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs10248420 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are kn...

rs7787082 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs7787082 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

In Caucasian non-Hispanics, the rs1360780(T) allele is associated with increased risk for depression, with an odds ratio of 1.39 (CI: 1.14-1.70, p=0.046). This same SNP, which is in the FKBP5 gene, may influence how patients respond to antidepressants including citalopram. rs1360780(T;T) homozgyotes tend to report more depressive episodes, but they also respond better to treatment with antidepressants. rs9296158 rs3800373 rs1360780 rs9470080 linked with the severity of child abuse to predict level of adult PTSD symptoms after correcting for multiple testing. [PharmGKB:Curated This variant is associated with higher chance of response to anti-depressant drugs.] [OMIM:FK506-BINDING PROTEIN 5; FKBP5]

rs908867 is a SNP near the brain-derived neurotrophic factor BDNF gene. In a study of , the rs908867 was associated with antidepressant response, with heterozygote carriers showing a better response than homozygotes. However, a critique of this study was published , indicating that this finding should be viewed as preliminary until more research is conducted for several reasons, to wit, 'First, the study included not only major depression but also bipolar disorder patients; second, various antidepressants were used in this study, which could affect patients' responses; third, the frequency of the haplotype associated with treatment response is rare; and fourth, previous studies of the effects of single BDNF polymorphisms on antidepressant action have reported conflicting findings.' A brain...

rs16973225 is a SNP on chromosome 15q25.2 near the IL16 gene. In a long-term study of ~17,000 individuals and aspirin or NSAID use, the few (9%) with either an (A;C) or (C;C) genotype showed no risk reduction for colorectal cancer compared with (A;A) individuals among those taking anti-inflammatory drugs, who did benefit (prevalence, 28% vs 38%; (A;A) odds ratio 0.66 when taking aspirin/NSAID, CI: 0.62-0.71, p = 1.9 × 10e−30). If this data is robust and all other factors are equal, this indicates that most people will lower their colorectal cancer risk by taking aspirin or NSAIDs, since most people have rs16973225(A;A) genotypes. However, the few people who are rs16973225(A;C) or are rs16973225(C;C) will not change their risk one way or the other by taking aspirin. This same study reached ...

SNP rs1057910(A), located in the cytochrome p450 CYP2C9 gene, most commonly encodes the amino acid isoleucine at position 359, and the resulting allele is also known as CYP2C9*1. rs1057910(C) encodes a leucine at this same position, and the resulting allele is called CYP2C9*3. This SNP is also known as Ile359Leu or A1075C. The effect of CYP2C9 variants on drug metabolism should not be predicted without also considering CYP2C9*2, defined as the common loss of function variant rs1799853(T) (NM_000771:c.430C>T, NP_000762:p.144R>C) Studies of the effects of these alleles include: * rs1057910(C;C)] genotypes may clear drugs like celecoxib (trade name Celebrex) twice as slowly as rs1057910(A;A) genotypes; the rs1057910(A;C) genotypes are in-between clearance rates. Lower clearance rates wi...

rs3842787, also known as 50C>T, is a SNP in the signal peptide region of the cyclooxygenase-1 PTGS1 gene. A study of 696 European patients undergoing elective diagnostic coronary angiographies (CAGs) because of suspected or proven stable coronary artery disease found that 23 experienced bleeding, perhaps the most common complication of this type of invasive coronary procedure. After controlling for various variables (especially gender), two co-inherited SNPs, rs10306114 and rs3842787, were found to be associated with higher risk for bleeding in otherwise low risk patients who (i) did undergo percutaneous coronary intervention and (ii) did not take clopidogrel. Having the less common haplotype (rs10306114(G) and/or rs3842787(T)) increases the bleeding risk upon CAG ~12 fold (p = 0.012). ...

rs3798220, also known as I4399M or Ile4399Met, is a SNP in the apolipoprotein(A) LPA gene that has been reported to be associated with elevated plasma lipoprotein(a) [Lp(a)] and increased cardiovascular risk, and in particular, coronary artery disease. In one study, 25,131 initially healthy Caucasian participants in the Women's Health Study were followed for ~10 years. rs3798220(C) allele carriers (3.7%) in the placebo (i.e. not receiving aspirin) group had a 2x higher risk of major cardiovascular events than non-carriers (age-adjusted hazard ratio (HR) of 2.21, CI: 1.39-3.52). Among rs3798220(C) carriers, the risk was reduced more than twofold by aspirin: for aspirin compared with placebo the age-adjusted HR was 0.44 (CI: 0.20-0.94). The risk was not significantly reduced among non-carrie...

rs28371685, also known as 1003C>T, 42542C>T or R335W is a SNP in the CYP2C9 gene. The rs28371685(T) allele defines the CYP2C9*11 variant, which has decreased activity. According to a 23andMe discussion This is one of the SNPs which were re-analyzed April 2009. Customers with older data may wish to redownload. SNPs effected rs4420638, rs34276300, rs3091244, rs34601266, rs2033003, rs7900194, rs9332239, rs28371685, rs1229984, and rs28399504. [PharmGKB:Curated Phenotype: In African Americans patients, weekly warfarin dose requirements were lower in those with the CYP2C9*8 allele (34 (30-47) mg; P = 0.023) and the CYP2C9 *2, *3, *5, *6, or *11 allele (33(28-40 mg); P < 0.001) as compared with those with the CYP2C9*1/*1 genotype (43 (35-56) mg). Adding the *5,*6,*8 and *11 alleles to a...

rs28371686, also known as 1080C>G, 42619C>G or D360E, is a SNP in the CYP2C9 gene. The rs28371686(G) allele defines the CYP2C9*5 variant, which appears to have decreased activity. [PharmGKB:Curated Phenotype: In African Americans patients, weekly warfarin dose requirements were lower in those with the CYP2C9*8 allele (34 (30-47) mg; P = 0.023) and the CYP2C9 *2, *3, *5, *6, or *11 allele (33(28-40 mg); P < 0.001) as compared with those with the CYP2C9*1/*1 genotype (43 (35-56) mg). Adding the *5,*6,*8 and *11 alleles to a model containing the *2 and *3 alleles plus the VKORC1 -1639 G>A allele (along with clinical variables) explained 36% vs. 30% of the variability in dose requirements. Study size: 226 . Study population/ethnicity: African-American . Type of association: PD;GN;...

G allele associated with better response to treatment of ADHD with atomoxetine.

T allele associated with better response to treatment of ADHD with atomoxetine.

The wild type (normal) allele at this SNP is (C). The (T) variant indicates the presence of a non-wild type CYP2D6 variant, but it appears in many different variants so it can not be used to determine the presence of any particular variant. The most common variants it appears in are CYP2D6*10 and CYP2D6*4, but these are not the only ones. While this is the defining mutation for CYP2D6*10, it is not possible by itself for this mutation to determine a particular variant. In addition, the CYP2D6*4 variant includes this mutation, but the defining mutation 1846G>A SNP is not available in the common direct to consumer testing services. While it is not possible for this mutation to identify one particular variant, all the variants in which it appears have reduced or no CYP2D6 activity. If two ...

rs1142345 is a SNP in the TPMT gene, potentially encoding a variant incapable of detoxifying byproducts of certain antineoplastic and immunosuppressant drugs. In general, individuals must have two nonfunctioning TPMT alleles for the toxicity to be pronounced. The risk allele for this SNP is rs1142345(G), and when it is the only variant in the TPMT gene, it encodes the TPMT*3C allele. While still rare, it is more common in African-Americans (2.4% of all alleles) than in Caucasians. Note that if the same allele also carries the rs1800460(A) SNP, the allele is actually a TPMT*3A allele (OMIM). The medicine 6-Mercaptopurine is metabolized by TPMT. Individual differences in TPMT activity associated with this SNP are now used to determine appropriate dosage range and interval for treatment. 23an...

rs1800584 is a rare SNP in the TPMT gene, potentially encoding a variant incapable of detoxifying byproducts of certain antineoplastic and immunosuppressant drugs. In general, individuals must have two nonfunctioning TPMT alleles for the toxicity to be pronounced. The rs1800584(A) SNP defines the TPMT*4A allele (OMIM). wikipedia thiopurine drugs metabolized by TPMT include azathioprine, mercaptopurine, and thioguanine [PharmGKB:In-Depth This splicing variant results in very low TPMT activity and risk for hematologic toxicity as a result of treatment with thiopurines.]

rs1800460 is a SNP in the TPMT gene, potentially encoding a variant incapable of detoxifying byproducts of certain antineoplastic and immunosuppressant drugs. In general, individuals must have two nonfunctioning TPMT alleles for the toxicity to be pronounced. The risk allele for this SNP is rs1800460(A), and when it is the only variation in the TPMT gene, it encodes the TPMT*3B allele. While still rare, it is more common in Caucasians (4.5% of all alleles) than in African-Americans (0.8%). Note that if the same allele also carries the rs1142345(G) SNP, the allele is actually a TPMT*3A allele (OMIM). The medicine 6-Mercaptopurine is metabolized by TPMT. Individual differences in TPMT activity associated with this SNP are now used to determine appropriate dosage range and interval for treatm...

rs1800462, also known as A80P, is a rare SNP in the TPMT gene, potentially encoding a variant incapable of detoxifying byproducts of certain antineoplastic and immunosuppressant drugs. In general, individuals must have two nonfunctioning TPMT alleles for the toxicity to be pronounced. The risk allele for this SNP (in orientation to the dbSNP entry) is rs1800462(C), and it encodes the TPMT*2 allele. It may occur at a frequency of 1 in 200 alleles among Caucasians. wikipedia thiopurine drugs metabolized by TPMT include azathioprine, mercaptopurine, and thioguanine [PharmGKB:In-Depth The TPMT:238G>C SNP was cloned from a patient with severe mercaptopurine toxicity. It results in a non-synonymous protein change TPMT:Ala80Pro that has a 100-fold reduction in catalytic activity compared to w...

This SNP encodes a variation in the 33rd amino acid of the protein encoded by the TBX21 gene. Although 95% or so of all Caucasians carry two copies of the rs2240017(G) allele, as oriented in dbSNP orientation, and are thus rs2240017(G;G) homozygotes, a few individuals are rs2240017(C;G) heterozygotes. These heterozgotes are reported to improve better over time in response to corticosteroid treatment for asthma than the rs2240017(G;G) homozygotes. So far, studies have not linked, however, this SNP to any change in the overall risk of asthma itself. Although the effect observed was strong, in that treating rs2240017(C;G) heterozygotes ultimately (over 4 years) yields average airway responsiveness in the normal range (i.e. in the same range as for nonasthmatics), the authors point out that th...

rs1800497, a SNP also known as the TaqIA (or Taq1A) polymorphism of the dopamine D2 receptor DRD2 gene (even though it is actually located over 10,000bp downstream of the gene), gives rise to the DRD2*A1 allele. This allele (rs1800497(T)) is associated with a reduced number of dopamine binding sites in the brain . Reduced response to errors and increased addictive behavior It has been postulated to play a role in alcoholism, smoking, and certain neuropsychiatric disorders. The reduced number of dopamine binding sites may play a role in nicotine addiction by causing an 'understimulated' state that can be relieved by smoking (and/or use of other drugs). A wide variety of reports have been published over more than ten years either linking rs1800497 to aspects of nicotine use and smoking cessa...

Variation at this SNP, rs5751876, also referred to as 1976C>T or 1976T>C, appears to influence how an individual responds to moderate levels (150mg) of caffeine. T/T carriers displaying significantly increased subjective levels of anxiety after consumption. However a PharmGKB variant annotation suggests it is (C;C) genotypes who are more sensitive to caffeine. rs5751876 is not associated with how much coffee one drinks, though, nor with risk for Parkinson's disease, based on a study of 1,200 subjects. 'rs2298383 shows functional potential based on in silico analyses and might therefore represent the true underlying causal variant'

rs1061235(T) serves as a proxy for the HLA-A*3101 allele. The HLA-A*3101 allele, found in about 2 - 5% of Northern Europeans, is significantly associated with carbamazepine hypersensitivity syndrome, with odds ratios above 10. The presence of this HLA allele increases the risk from 5% to 26%, whereas its absence reduces the risk from 5% to 4%. [GWAS:None]

Helps to identify HLA-B*1502 [PharmGKB:Curated Risk or phenotype-associated allele: allele 4. Phenotype: Combined alleles of rs3909184 (2) and rs2844682 (4) are tagging SNPs for HLA-B*1502 (0.011 allele frequency). Study size: 45. Study population/ethnicity: Unrelated Han Chinese from Beijing, China. Significance metric(s): Type of association: GN]

Helps to identify HLA-B*1502 [PharmGKB:Curated Risk or phenotype-associated allele: allele 2. Phenotype: Combined alleles of rs3909184 (2) and rs2844682 (4) are tagging SNPs for HLA-B*1502 (0.011 allele frequency). Study size: 45. Study population/ethnicity: Unrelated Han Chinese from Beijing, China. Significance metric(s): Type of association: GN]

rs2032583 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs2032583 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

rs1801274 is a SNP in the Fc fragment of IgG, low affinity IIa, receptor (CD32) FCGR2A gene. rs1801274(C) encodes the arginine (R) allele, with the (T) allele encoding the variant histidine (H). The (H) isoform is considered high-binding to IgG2 and IgG3, while the (R) isoform is considered low-binding. This SNP is known in the literature by many names, including A519C and H131R. What's the importance of this? FcgR isoforms expressed on immune system cells have been linked to the pathogenic consequences triggered by autoantibodies or immune complexes in autoimmune diseases such as rheumatoid arthritis (RA) and systemic lupus erythematosus (SLE), as well as to the efficacy of some immunotherapeutic treatments such as rituximab. Many studies have been published about this FCGR2A SNP, roughly...

This SNP, a variant in the TP53 gene, is 1 of 25 SNPs reported to represent independently minor, but cumulatively significant, increased risk for breast cancer. For details of all 25 SNPs in this group, along with the two methods used to calculate overall risk estimates for breast cancer, refer to the SNPedia breast cancer entry. For this particular SNP, the G allele encodes an arginine at position 72 of the protein (where there's normally a proline), and the SNP is commonly called the Arg72 variant, although P72R and Arg72Pro are also common in the literature. Minor allele homozygotes, i.e. rs1042522(C;C) genotypes, live on average 3 years longer than major allele (G;G) homozygotes, based on a study of 9,200+ Danish individuals. The increased longevity is speculated to be related to the i...

rs1142345 is a SNP in the TPMT gene, potentially encoding a variant incapable of detoxifying byproducts of certain antineoplastic and immunosuppressant drugs. In general, individuals must have two nonfunctioning TPMT alleles for the toxicity to be pronounced. The risk allele for this SNP is rs1142345(G), and when it is the only variant in the TPMT gene, it encodes the TPMT*3C allele. While still rare, it is more common in African-Americans (2.4% of all alleles) than in Caucasians. Note that if the same allele also carries the rs1800460(A) SNP, the allele is actually a TPMT*3A allele (OMIM). The medicine 6-Mercaptopurine is metabolized by TPMT. Individual differences in TPMT activity associated with this SNP are now used to determine appropriate dosage range and interval for treatment. 23an...

rs2235015 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs2032583 is near 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. rs2235015 has an r² value of >0.5 with this group. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported ...

rs2032583 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs2032583 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

rs4148740 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs4148740 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

rs11983225 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs11983225 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are kn...

rs12720067 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs12720067 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are kn...

rs2235040 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs2235040 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

rs2235067 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs2235067 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

rs4148739 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs4148739 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

rs10248420 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs10248420 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are kn...

rs7787082 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs7787082 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

In Caucasian non-Hispanics, the rs1360780(T) allele is associated with increased risk for depression, with an odds ratio of 1.39 (CI: 1.14-1.70, p=0.046). This same SNP, which is in the FKBP5 gene, may influence how patients respond to antidepressants including citalopram. rs1360780(T;T) homozgyotes tend to report more depressive episodes, but they also respond better to treatment with antidepressants. rs9296158 rs3800373 rs1360780 rs9470080 linked with the severity of child abuse to predict level of adult PTSD symptoms after correcting for multiple testing. [PharmGKB:Curated This variant is associated with higher chance of response to anti-depressant drugs.] [OMIM:FK506-BINDING PROTEIN 5; FKBP5]

Pharmacogenetics of antidepressant response. [GWAS:Treatment response to citalopram]

rs12248560(T) defines the CYP2C19*17 allele, an ultra fast metabolizer phenotype of the CYP2C19 gene. CYP2C19*17 is likely to lead to less effective drug treatment by, for example, proton pump inhibitors (such as omeprazole) and antidepressants. On the other hand, cancer patients who are CYP2C19*17 carriers are more likely to benefit from tamoxifen treatment, presumably because they break it down more rapidly into the antiestrogenic metabolites endoxifen and 4-hydroxytamoxifen. A study of 1,000+ breast cancer patients showed a 0.77x decreased risk of breast cancer for carriers of a CYP2C19*17 allele (CI: 0.65-0.93, p = 0.005). Analysis of a subgroup of such carriers who were using hormone therapy for ten years or longer showed an even stronger effect (odds ratio 0.57, CI: 0.39-0.83, p = 0....

JAMA rs12777823 and rs4244285 implicated in platelet response to clopidogrel [PharmGKB:Curated A GWAS found this variant (rs12777823) was the most significantly associated SNP with clopidogrel response. This SNP was in strong linkage disequilibrium with 12 further SNPs within the CYP2C18-CYP2C19-CYP2C9-CYP2C8 cluster (rs12777823; rs10109204; rs2025445; rs1326837; rs717238; rs2860838; rs2860903; rs9332105; rs9332113; rs12572351; rs10509679; rs1934951; rs1934680) and also with the loss-of-function variant CYP2C19*2 (rs4244285). Further findings in this study showed that the CYP2C19*2 genotype accounted for most of all the initially found association with diminished platelet response to clopidogrel.]

rs4244285 is a SNP in the CYP2C19 gene, potentially encoding the CYP2C19*2 variant. This variant is the most common reason for poor metabolism of compounds like mephenytoin (an anti-convulsant), some antidepressants, the anti-platelet drug Plavix, and some drugs used for ulcer conditions of various types. The risk allele is rs4244285(A). As a nonfunctioning CYP2C19, this variant would be expected to be a poor metabolizer of several commonly prescribed drugs, including anti-ulcer drugs like omeprazole (trade names Losec and Prilosec), esomeprazole (trade name Nexium), and lansoprazole (trade name Prevacid). In Caucasians, SNPs in CYP2C19 are relatively rare (in contrast to SNPs in CYP2D6), but SNPs in this gene are common in Asians. Ulcer treatment with omeprazole to reduce Helicobacter pyl...

rs3842787, also known as 50C>T, is a SNP in the signal peptide region of the cyclooxygenase-1 PTGS1 gene. A study of 696 European patients undergoing elective diagnostic coronary angiographies (CAGs) because of suspected or proven stable coronary artery disease found that 23 experienced bleeding, perhaps the most common complication of this type of invasive coronary procedure. After controlling for various variables (especially gender), two co-inherited SNPs, rs10306114 and rs3842787, were found to be associated with higher risk for bleeding in otherwise low risk patients who (i) did undergo percutaneous coronary intervention and (ii) did not take clopidogrel. Having the less common haplotype (rs10306114(G) and/or rs3842787(T)) increases the bleeding risk upon CAG ~12 fold (p = 0.012). ...

rs10306114, also known as -842A>G, is a SNP upstream of the cyclooxygenase-1 PTGS1 gene. A study of 696 European patients undergoing elective diagnostic coronary angiographies (CAGs) because of suspected or proven stable coronary artery disease found that 23 experienced bleeding, perhaps the most common complication of this type of invasive coronary procedure. After controlling for various variables (especially gender), two co-inherited SNPs, rs10306114 and rs3842787, were found to be associated with higher risk for bleeding in otherwise low risk patients who (i) did undergo percutaneous coronary intervention and (ii) did not take clopidogrel. Having the less common haplotype (rs10306114(G) and/or rs3842787(T)) increases the bleeding risk upon CAG ~12 fold (p = 0.012).

rs28399504 is a SNP in the CYP2C19 gene, potentially encoding the CYP2C19*4 variant. This variant has been linked to poor metabolism of compounds like mephenytoin. It is also known as M1V or Met1Val. The risk allele is rs28399504(G). As a nonfunctioning CYP2C19, this variant would be expected to be a poor metabolizer of several commonly prescribed drugs, including anti-ulcer drugs like omeprazole (trade names Losec and Prilosec), esomeprazole (trade name Nexium), and lansoprazole (Prevacid). According to a 23andMe discussion This is one of the SNPs which were re-analyzed April 2009. Customers with older data may wish to redownload. SNPs effected rs4420638, rs34276300, rs3091244, rs34601266, rs2033003, rs7900194, rs9332239, rs28371685, rs1229984, and rs28399504. Clopidogrel Efficacy [Pharm...

Defines the CYP2C19 variant known as CYP2C19*8. Carriers of the rs41291556(C) allele may have decreased activity and poor metabolizer (PM) phenotype. This variant is associated with a dramatic (approximately 90% and 70%) reduction in the metabolism of S-mephenytoin and tolbutamide in vitro. Clopidogrel Efficacy [PharmGKB:Curated This variant is the defining SNP for CYP2C19*8 and leads to decreased activity and poor metabolizer (PM) phenotype.This variant is associated with a dramatic (approximately 90% and 70%) reduction in the metabolism of S-mephenytoin and tolbutamide in vitro.]

rs4986893 is a SNP in the CYP2C19 gene, potentially encoding the CYP2C19*3 variant. This variant has been linked to poor metabolism of compounds like mephenytoin as well as proguanil, and it therefore has implications for malaria prophylaxis. The risk allele is rs4986893(A). As a nonfunctioning CYP2C19, this variant would be expected to be a poor metabolizer of several commonly prescribed drugs, including anti-ulcer drugs like omeprazole (trade names Losec and Prilosec), esomeprazole (trade name Nexium), and lansoprazole (Prevacid). Clopidogrel Efficacy [PharmGKB:Curated In contrast to other PPIs, esomeprazole-induced healing of GERD appears to be unrelated to the CYP2C19*3 variant.] [OMIM:MEPHENYTOIN, POOR METABOLISM OF]

The rs72558186(A) SNP represents a CYP2C19 allele known as CYP2C19*7; it reflects a splice donor mutation that leads to a poor metabolizer phenotype. This SNP is also known as CYP2C19_19294T>A, and in the Affymetrix DMET panel, as DMET3B10072. Note: absence of allele frequency data leaves this as a possible ambiguous flip.

rs5443, a SNP in the G-protein beta3 subunit (GNB3) gene that is more commonly known as the C825T variant, has been linked to a number of metabolic conditions including obesity, coronary artery disease, insulin resistance and therefore diabetes, left ventricular hypertrophy, and hypertension. It has also been linked to how well a patient responds to Viagra (sildenafil). Several studies have been unable to replicate one or more of the associations in at least some populations between this SNP and these conditions. The more notable studies include: *rs5443(T) allele carriers are 2-3 fold more likely to be obese in Caucasian, Chinese, and African American populations. *rs5443(T) carriers are clearly at higher risk for hypertension, but this review indicates that whether they are also at incre...

gwas, among 738 schizophrenics genotyped for 492K SNPs, this SNP attained a p-val of 3 x 10^-6 for triglycerides as a result of clozapine use

gwas, among 738 schizophrenics genotyped for 492K SNPs, this SNP attained a p-val of 6 x 10^-8 for triglycerides as a result of clozapine use

The wild type (normal) allele at this SNP is (C). The (T) variant indicates the presence of a non-wild type CYP2D6 variant, but it appears in many different variants so it can not be used to determine the presence of any particular variant. The most common variants it appears in are CYP2D6*10 and CYP2D6*4, but these are not the only ones. While this is the defining mutation for CYP2D6*10, it is not possible by itself for this mutation to determine a particular variant. In addition, the CYP2D6*4 variant includes this mutation, but the defining mutation 1846G>A SNP is not available in the common direct to consumer testing services. While it is not possible for this mutation to identify one particular variant, all the variants in which it appears have reduced or no CYP2D6 activity. If two ...

rs5558 (F528C) is a non-synonymous SNP in SLC6A2 (norepinephrine transporter), with a T encoding for Phenylalanine and C encoding the rare Cysteine variant. assoc. w/ major depression Cysteine variant exhibited increased norepinephrine transport, insensitivity to protein kinase C induced down-regulation, and a decrease in desipramine (tricyclic antidepressant) potency

The wild type (normal) allele at this SNP is (C). The (T) variant indicates the presence of a non-wild type CYP2D6 variant, but it appears in many different variants so it can not be used to determine the presence of any particular variant. The most common variants it appears in are CYP2D6*10 and CYP2D6*4, but these are not the only ones. While this is the defining mutation for CYP2D6*10, it is not possible by itself for this mutation to determine a particular variant. In addition, the CYP2D6*4 variant includes this mutation, but the defining mutation 1846G>A SNP is not available in the common direct to consumer testing services. While it is not possible for this mutation to identify one particular variant, all the variants in which it appears have reduced or no CYP2D6 activity. If two ...

rs671 is a classic SNP, well known in a sense through the phenomena known as the 'alcohol flush', also known as the 'Asian Flush' or 'Asian blush', in which certain individuals, often of Asian descent, have their face, neck and sometimes shoulders turn red after drinking alcohol. The rs671(A) allele of the ALDH2 gene is the culprit, in that it encodes a form of the aldehyde dehydrogenase 2 protein that is defective at metabolizing alcohol. This allele is known as the ALDH*2 form, and individuals possessing either one or two copies of it show alcohol-related sensitivity responses including facial flushing, and severe hangovers (and hence they are usually not regular drinkers). Perhaps not surprisingly they appear to suffer less from alcoholism and alcohol-related liver disease. Disulfiram (...

rs12762549 and rs11045585 can be used to predict whether docetaxel will induce leukopenia/neutropenia, according to a study of ~100 Japanese patients. When patients were classified into three groups by the scoring system based on the genotypes of these two SNPs, patients with a score of 1 or 2 were shown to have a significantly higher risk of docetaxel-induced leukopenia/neutropenia as compared to those with a score of 0 (P = 0.0000057; odds ratio [OR], 7.00; 95% CI [confidence interval], 2.95-16.59). This prediction system correctly classified 69.2% of severe leukopenia/neutropenia and 75.7% of non-leukopenia/neutropenia into the respective categories. [Effect percentages provided in table are raw population fractions taken from the referenced study based on rs11045585 only. Total populat...

This SNP, in the GSTP1 gene influences asthma risk; the (A) allele encodes the Ile, while the (G) allele encodes the Val. This SNP is also known as GSTP1Val105, or GSTP1 Ile105Val. Despite evidence of antioxidant effects of vitamin E in vitro and in animal studies, large, randomized clinical trials have not substantiated a benefit of vitamin E in reducing inflammation in humans. In healthy control subjects, the effect of α-tocopherol supplementation on the production of inflammatory cytokines appears to be dependent on an individual's genotype. These genotype-specific differences may help explain some of the discordant results in studies that used vitamin E. Persons having the alleles AA or AG had an increase in interleukin-6 (IL-6) upon supplementing alpha-tocopherol (the most common...

rs17221854, also known as Arg583Cys or R583C, is a SNP in the KCNQ1 gene on chromosome 11. The rs17221854(T) allele has been reported as associated with long QT syndrome. Additionally, a person who developed QT prolongation and torsade de pointes while taking the drug dofetilide carried this (T) allele, leading the authors to hypothesize that this mutation was responsible for the patient's drug response. This variant meets the criteria published in 2013 by the ACMG regarding incidental findings in exome or genome sequencing, as a variant that they do recommend informing a patient about. [OMIM:LONG QT SYNDROME 1]

rs2032583 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs2032583 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

rs2032583 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs2032583 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

rs2032583 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs2032583 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

rs2032583 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs2032583 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

rs6311 (-1438A>G / A-1438G or -1438G>A / G-1438A) is a SNP located upstream (and within the promoter region of) HTR2A. Multiple Regulatory Variants Modulate Expression of 5-Hydroxytryptamine 2A Receptors in Human Cortex. The minor A allele of rs6311 reduces expression of a previously unannotated extension of the 5' untranslated region of HTR2A mRNA. rs6311 together with rs6314 have a modest effect on depression severity, when examined in the Sequenced Treatment Alternatives to Relieve Depression (STAR*D) study. Three (rs643627-rs594242-rs6311: A-C-T), two (rs594242-rs6311: C-T) and a single functional (rs6311: T) marker were protective against suicidal behavior. The complementary markers (rs594242-rs6311: G-C and rs6311: C) were associated with increased risk for non-violent and impu...

rs2032583 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs2032583 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

rs4244285 is a SNP in the CYP2C19 gene, potentially encoding the CYP2C19*2 variant. This variant is the most common reason for poor metabolism of compounds like mephenytoin (an anti-convulsant), some antidepressants, the anti-platelet drug Plavix, and some drugs used for ulcer conditions of various types. The risk allele is rs4244285(A). As a nonfunctioning CYP2C19, this variant would be expected to be a poor metabolizer of several commonly prescribed drugs, including anti-ulcer drugs like omeprazole (trade names Losec and Prilosec), esomeprazole (trade name Nexium), and lansoprazole (trade name Prevacid). In Caucasians, SNPs in CYP2C19 are relatively rare (in contrast to SNPs in CYP2D6), but SNPs in this gene are common in Asians. Ulcer treatment with omeprazole to reduce Helicobacter pyl...

rs28399504 is a SNP in the CYP2C19 gene, potentially encoding the CYP2C19*4 variant. This variant has been linked to poor metabolism of compounds like mephenytoin. It is also known as M1V or Met1Val. The risk allele is rs28399504(G). As a nonfunctioning CYP2C19, this variant would be expected to be a poor metabolizer of several commonly prescribed drugs, including anti-ulcer drugs like omeprazole (trade names Losec and Prilosec), esomeprazole (trade name Nexium), and lansoprazole (Prevacid). According to a 23andMe discussion This is one of the SNPs which were re-analyzed April 2009. Customers with older data may wish to redownload. SNPs effected rs4420638, rs34276300, rs3091244, rs34601266, rs2033003, rs7900194, rs9332239, rs28371685, rs1229984, and rs28399504. Clopidogrel Efficacy [Pharm...

rs4986893 is a SNP in the CYP2C19 gene, potentially encoding the CYP2C19*3 variant. This variant has been linked to poor metabolism of compounds like mephenytoin as well as proguanil, and it therefore has implications for malaria prophylaxis. The risk allele is rs4986893(A). As a nonfunctioning CYP2C19, this variant would be expected to be a poor metabolizer of several commonly prescribed drugs, including anti-ulcer drugs like omeprazole (trade names Losec and Prilosec), esomeprazole (trade name Nexium), and lansoprazole (Prevacid). Clopidogrel Efficacy [PharmGKB:Curated In contrast to other PPIs, esomeprazole-induced healing of GERD appears to be unrelated to the CYP2C19*3 variant.] [OMIM:MEPHENYTOIN, POOR METABOLISM OF]

rs2395029 is a SNP in the major histocompatibility complex (MHC) region, and several studies have shown that the rs2395029(G) allele is 99.9% predictive of the presence of an HLA-B*5701 allele. This HLA allele, in turn, has been associated with several conditions. A study of 51 cases of flucloxacillin drug-induced liver injury (DILI), an important cause of serious liver disease, along with a replication study of another 23 cases, found that the rs2395029(G) carriers were at highly increased risk (odds ratio 80, p=8.7x10(-33)). * see also: 23andMe blog rs2395029(G;G) increases the odds of drug-induced liver injury in response to flucloxacillin by 45x This SNP is thought to be involved in determining the HIV viral load set point during the asymptomatic period of infection. This SNP is estima...

23andMe reports that the A allele of rs3918290 is associated with the rare recessive disorder dihydropyrimidine dehydrogenase deficiency (DPD), also known as hereditary thymine-uraciluria or familial pyrimidinemia. Note that the terms used in the literature for this gene can be confusing, since the gene is in reverse orientation to the chromosome strand on the reference genome. pharmgkb - defines *2A allele, which has a significantly higher chance of 5-fluorouracil toxicity Fluorouracil Toxicity [PharmGKB:In-Depth Heterozygosity for the A allele of this SNP is associated with mucositis and leukopenia drug toxicity in cancer patients treated with fluorouracil. Heterozygous males were more likely than heterozygous females to develop severe toxicity. In this study, no A/A homozygotes were ob...

rs55886062, also known as c.1679 T>G, encodes the DPYD*13 allele of the DPYD gene on chromosome 1. Note that the terms used in the literature for this gene can be confusing, since the gene is in reverse orientation to the chromosome strand on the reference genome.

rs67376798, also known as c.2846 A>T, is a SNP in the DPYD gene on chromosome 1. Note that the 'A>T' term in the name used in the literature for this SNP can be confusing, since the gene is in reverse orientation to the chromosome strand on the reference genome.

rs242941 is a SNP in the corticotrophin-releasing hormone receptor 1 CRHR1 gene. (G;G) better response to inhaled corticosteroids fluticasone propionate and salmeterol in patients with COPD in a Korean study with 84 subjects. [PharmGKB:Curated Haplotype tagging SNP.]

rs2231142, also known as Q141K and C421A, is a SNP in the ABCG2 gene, indicating a missense variant. 'Our data indicate that at least 10% of all gout cases in whites are attributable to this causal variant.' A is the risk allele. A large study totaling 7,699 participants in the Framingham cohort and 4,148 participants in the Rotterdam cohort was conducted, with genome-wide significant SNPs then replicated in 11,000+ Caucasian and ~4,000 African-American individuals who took part in the study of Atherosclerosis Risk in Communities (ARIC). This study calculated an odds ratio of 1.74 for rs2231142 (CI: 1.51-1.99, p = 3.3x10e-15). A genetic score comprised of this SNP plus 2 others may stratify risk for gout. Among non-small cell lung cancer patients treated with gefitinib, there's a 4-5x high...

rs351855, a SNP in the fibroblast growth factor receptor 4 (FGFR4) gene, is also known as the Gly388Arg variant. The rs351855(T) allele encodes the risk (Arg) allele. The Arg form of this SNP is likely to cause a harder to treat version of node-positive breast cancer, including reducing the efficacy of Herceptin, based on a study of 372 patients. A study of ~500 Japanese prostate cancer patients found that individuals with a rs351855(T;T) genotype had a 2.2- and 1.9-fold increased risk of prostate cancer and benign prostate hyperplasia (BPH), and a 1.8-fold increased risk of metastatic prostate cancer compared to the (C;C) genotype. A meta-analysis published in 2011, surveying a total of 2,618 cases of prostate cancer, concluded that the odds ratio per rs351855(T) allele was 1.17 (CI: 1.07...

SNP rs1057910(A), located in the cytochrome p450 CYP2C9 gene, most commonly encodes the amino acid isoleucine at position 359, and the resulting allele is also known as CYP2C9*1. rs1057910(C) encodes a leucine at this same position, and the resulting allele is called CYP2C9*3. This SNP is also known as Ile359Leu or A1075C. The effect of CYP2C9 variants on drug metabolism should not be predicted without also considering CYP2C9*2, defined as the common loss of function variant rs1799853(T) (NM_000771:c.430C>T, NP_000762:p.144R>C) Studies of the effects of these alleles include: * rs1057910(C;C)] genotypes may clear drugs like celecoxib (trade name Celebrex) twice as slowly as rs1057910(A;A) genotypes; the rs1057910(A;C) genotypes are in-between clearance rates. Lower clearance rates wi...

rs1801274 is a SNP in the Fc fragment of IgG, low affinity IIa, receptor (CD32) FCGR2A gene. rs1801274(C) encodes the arginine (R) allele, with the (T) allele encoding the variant histidine (H). The (H) isoform is considered high-binding to IgG2 and IgG3, while the (R) isoform is considered low-binding. This SNP is known in the literature by many names, including A519C and H131R. What's the importance of this? FcgR isoforms expressed on immune system cells have been linked to the pathogenic consequences triggered by autoantibodies or immune complexes in autoimmune diseases such as rheumatoid arthritis (RA) and systemic lupus erythematosus (SLE), as well as to the efficacy of some immunotherapeutic treatments such as rituximab. Many studies have been published about this FCGR2A SNP, roughly...

Carriers of the C allele at rs6139030 have a higher risk of developing thrombocytopenia when treated with interferon. Hepatitis C Treatment Side Effects [GWAS:None]

rs2231142, also known as Q141K and C421A, is a SNP in the ABCG2 gene, indicating a missense variant. 'Our data indicate that at least 10% of all gout cases in whites are attributable to this causal variant.' A is the risk allele. A large study totaling 7,699 participants in the Framingham cohort and 4,148 participants in the Rotterdam cohort was conducted, with genome-wide significant SNPs then replicated in 11,000+ Caucasian and ~4,000 African-American individuals who took part in the study of Atherosclerosis Risk in Communities (ARIC). This study calculated an odds ratio of 1.74 for rs2231142 (CI: 1.51-1.99, p = 3.3x10e-15). A genetic score comprised of this SNP plus 2 others may stratify risk for gout. Among non-small cell lung cancer patients treated with gefitinib, there's a 4-5x high...

This SNP, a variant in the TP53 gene, is 1 of 25 SNPs reported to represent independently minor, but cumulatively significant, increased risk for breast cancer. For details of all 25 SNPs in this group, along with the two methods used to calculate overall risk estimates for breast cancer, refer to the SNPedia breast cancer entry. For this particular SNP, the G allele encodes an arginine at position 72 of the protein (where there's normally a proline), and the SNP is commonly called the Arg72 variant, although P72R and Arg72Pro are also common in the literature. Minor allele homozygotes, i.e. rs1042522(C;C) genotypes, live on average 3 years longer than major allele (G;G) homozygotes, based on a study of 9,200+ Danish individuals. The increased longevity is speculated to be related to the i...

rs58597806 (Asp256Asn/D256N) is a SNP within UGT1A9 (UDP glucuronosyltransferase 1 family, polypeptide A9). reduced propofol glucuronidation - considerably lowered glucuronidation of mycophenolic acid, 1-naphthol, and naringenin. may be at risk adverse effects w/ propofol and other UGT1A9 substrate administration essentially non-functional with regard to SN-38 (7-ethyl-10-hydroxycamptothecin) glucuronidation, an active metabolite of irinotecan [PharmGKB:Curated A study in 100 healthy Japanese volunteers showed that carriers of D256N may be at risk of suffering adverse effects of propofol and other substrates that are primarily metabolized by UGT1A9. In in vitro analyses the K(m) of wild-type and D256N for propofol glucuronidation were 111.2 and 43.6 microM, respectively. The V(max) of D25...

rs4244285 is a SNP in the CYP2C19 gene, potentially encoding the CYP2C19*2 variant. This variant is the most common reason for poor metabolism of compounds like mephenytoin (an anti-convulsant), some antidepressants, the anti-platelet drug Plavix, and some drugs used for ulcer conditions of various types. The risk allele is rs4244285(A). As a nonfunctioning CYP2C19, this variant would be expected to be a poor metabolizer of several commonly prescribed drugs, including anti-ulcer drugs like omeprazole (trade names Losec and Prilosec), esomeprazole (trade name Nexium), and lansoprazole (trade name Prevacid). In Caucasians, SNPs in CYP2C19 are relatively rare (in contrast to SNPs in CYP2D6), but SNPs in this gene are common in Asians. Ulcer treatment with omeprazole to reduce Helicobacter pyl...

rs28399504 is a SNP in the CYP2C19 gene, potentially encoding the CYP2C19*4 variant. This variant has been linked to poor metabolism of compounds like mephenytoin. It is also known as M1V or Met1Val. The risk allele is rs28399504(G). As a nonfunctioning CYP2C19, this variant would be expected to be a poor metabolizer of several commonly prescribed drugs, including anti-ulcer drugs like omeprazole (trade names Losec and Prilosec), esomeprazole (trade name Nexium), and lansoprazole (Prevacid). According to a 23andMe discussion This is one of the SNPs which were re-analyzed April 2009. Customers with older data may wish to redownload. SNPs effected rs4420638, rs34276300, rs3091244, rs34601266, rs2033003, rs7900194, rs9332239, rs28371685, rs1229984, and rs28399504. Clopidogrel Efficacy [Pharm...

rs4986893 is a SNP in the CYP2C19 gene, potentially encoding the CYP2C19*3 variant. This variant has been linked to poor metabolism of compounds like mephenytoin as well as proguanil, and it therefore has implications for malaria prophylaxis. The risk allele is rs4986893(A). As a nonfunctioning CYP2C19, this variant would be expected to be a poor metabolizer of several commonly prescribed drugs, including anti-ulcer drugs like omeprazole (trade names Losec and Prilosec), esomeprazole (trade name Nexium), and lansoprazole (Prevacid). Clopidogrel Efficacy [PharmGKB:Curated In contrast to other PPIs, esomeprazole-induced healing of GERD appears to be unrelated to the CYP2C19*3 variant.] [OMIM:MEPHENYTOIN, POOR METABOLISM OF]

rs2032583 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs2032583 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

rs4244285 is a SNP in the CYP2C19 gene, potentially encoding the CYP2C19*2 variant. This variant is the most common reason for poor metabolism of compounds like mephenytoin (an anti-convulsant), some antidepressants, the anti-platelet drug Plavix, and some drugs used for ulcer conditions of various types. The risk allele is rs4244285(A). As a nonfunctioning CYP2C19, this variant would be expected to be a poor metabolizer of several commonly prescribed drugs, including anti-ulcer drugs like omeprazole (trade names Losec and Prilosec), esomeprazole (trade name Nexium), and lansoprazole (trade name Prevacid). In Caucasians, SNPs in CYP2C19 are relatively rare (in contrast to SNPs in CYP2D6), but SNPs in this gene are common in Asians. Ulcer treatment with omeprazole to reduce Helicobacter pyl...

rs28399504 is a SNP in the CYP2C19 gene, potentially encoding the CYP2C19*4 variant. This variant has been linked to poor metabolism of compounds like mephenytoin. It is also known as M1V or Met1Val. The risk allele is rs28399504(G). As a nonfunctioning CYP2C19, this variant would be expected to be a poor metabolizer of several commonly prescribed drugs, including anti-ulcer drugs like omeprazole (trade names Losec and Prilosec), esomeprazole (trade name Nexium), and lansoprazole (Prevacid). According to a 23andMe discussion This is one of the SNPs which were re-analyzed April 2009. Customers with older data may wish to redownload. SNPs effected rs4420638, rs34276300, rs3091244, rs34601266, rs2033003, rs7900194, rs9332239, rs28371685, rs1229984, and rs28399504. Clopidogrel Efficacy [Pharm...

rs4986893 is a SNP in the CYP2C19 gene, potentially encoding the CYP2C19*3 variant. This variant has been linked to poor metabolism of compounds like mephenytoin as well as proguanil, and it therefore has implications for malaria prophylaxis. The risk allele is rs4986893(A). As a nonfunctioning CYP2C19, this variant would be expected to be a poor metabolizer of several commonly prescribed drugs, including anti-ulcer drugs like omeprazole (trade names Losec and Prilosec), esomeprazole (trade name Nexium), and lansoprazole (Prevacid). Clopidogrel Efficacy [PharmGKB:Curated In contrast to other PPIs, esomeprazole-induced healing of GERD appears to be unrelated to the CYP2C19*3 variant.] [OMIM:MEPHENYTOIN, POOR METABOLISM OF]

The wild type (normal) allele at this SNP is (C). The (T) variant indicates the presence of a non-wild type CYP2D6 variant, but it appears in many different variants so it can not be used to determine the presence of any particular variant. The most common variants it appears in are CYP2D6*10 and CYP2D6*4, but these are not the only ones. While this is the defining mutation for CYP2D6*10, it is not possible by itself for this mutation to determine a particular variant. In addition, the CYP2D6*4 variant includes this mutation, but the defining mutation 1846G>A SNP is not available in the common direct to consumer testing services. While it is not possible for this mutation to identify one particular variant, all the variants in which it appears have reduced or no CYP2D6 activity. If two ...

rs4680 (Val158Met) is a well studied SNP in the COMT gene. 23andMe blog summarizes them as *rs4680(A) = Worrier. Met, more exploratory, lower COMT enzymatic activity, therefore higher dopamine levels; lower pain threshold, enhanced vulnerability to stress, yet also more efficient at processing information under most conditions *rs4680(G) = Warrior. Val, less exploratory, higher COMT enzymatic activity, therefore lower dopamine levels; higher pain threshold, better stress resiliency, albeit with a modest reduction in executive cognition performance under most conditions Roughly speaking, the predominant wisdom (known colloquially as the warrior/worrier hypothesis; summary at ) posits that people with Val alleles have increased COMT activity and lower prefrontal extracellular dopamine compar...

Genome-wide association study identifies a potent locus associated with human opioid sensitivity rs2952768(C) was associated with more analgesic requirements ... exhibited less vulnerability to severe methamphetamine or alcohol dependence, fewer eating disorders, and a lower ‘Reward Dependence’ score on a personality questionnaire. The (C;C) genotype was significantly associated with the elevated expression of a neighboring gene, CREB1. SNPs in this locus are the most potent genetic factors associated with human opioid sensitivity known to date, affecting both the efficacy of opioid analgesics such as morphine and fentanyl and liability to severe substance dependence. These findings may provide valuable information for the personalized treatment of pain and drug dependence. Oth...

SNP rs1057910(A), located in the cytochrome p450 CYP2C9 gene, most commonly encodes the amino acid isoleucine at position 359, and the resulting allele is also known as CYP2C9*1. rs1057910(C) encodes a leucine at this same position, and the resulting allele is called CYP2C9*3. This SNP is also known as Ile359Leu or A1075C. The effect of CYP2C9 variants on drug metabolism should not be predicted without also considering CYP2C9*2, defined as the common loss of function variant rs1799853(T) (NM_000771:c.430C>T, NP_000762:p.144R>C) Studies of the effects of these alleles include: * rs1057910(C;C)] genotypes may clear drugs like celecoxib (trade name Celebrex) twice as slowly as rs1057910(A;A) genotypes; the rs1057910(A;C) genotypes are in-between clearance rates. Lower clearance rates wi...

rs4244285 is a SNP in the CYP2C19 gene, potentially encoding the CYP2C19*2 variant. This variant is the most common reason for poor metabolism of compounds like mephenytoin (an anti-convulsant), some antidepressants, the anti-platelet drug Plavix, and some drugs used for ulcer conditions of various types. The risk allele is rs4244285(A). As a nonfunctioning CYP2C19, this variant would be expected to be a poor metabolizer of several commonly prescribed drugs, including anti-ulcer drugs like omeprazole (trade names Losec and Prilosec), esomeprazole (trade name Nexium), and lansoprazole (trade name Prevacid). In Caucasians, SNPs in CYP2C19 are relatively rare (in contrast to SNPs in CYP2D6), but SNPs in this gene are common in Asians. Ulcer treatment with omeprazole to reduce Helicobacter pyl...

rs28399504 is a SNP in the CYP2C19 gene, potentially encoding the CYP2C19*4 variant. This variant has been linked to poor metabolism of compounds like mephenytoin. It is also known as M1V or Met1Val. The risk allele is rs28399504(G). As a nonfunctioning CYP2C19, this variant would be expected to be a poor metabolizer of several commonly prescribed drugs, including anti-ulcer drugs like omeprazole (trade names Losec and Prilosec), esomeprazole (trade name Nexium), and lansoprazole (Prevacid). According to a 23andMe discussion This is one of the SNPs which were re-analyzed April 2009. Customers with older data may wish to redownload. SNPs effected rs4420638, rs34276300, rs3091244, rs34601266, rs2033003, rs7900194, rs9332239, rs28371685, rs1229984, and rs28399504. Clopidogrel Efficacy [Pharm...

rs4986893 is a SNP in the CYP2C19 gene, potentially encoding the CYP2C19*3 variant. This variant has been linked to poor metabolism of compounds like mephenytoin as well as proguanil, and it therefore has implications for malaria prophylaxis. The risk allele is rs4986893(A). As a nonfunctioning CYP2C19, this variant would be expected to be a poor metabolizer of several commonly prescribed drugs, including anti-ulcer drugs like omeprazole (trade names Losec and Prilosec), esomeprazole (trade name Nexium), and lansoprazole (Prevacid). Clopidogrel Efficacy [PharmGKB:Curated In contrast to other PPIs, esomeprazole-induced healing of GERD appears to be unrelated to the CYP2C19*3 variant.] [OMIM:MEPHENYTOIN, POOR METABOLISM OF]

nortriptyline response [PharmGKB:Curated Risk or phenotype-associated allele: A Phenotype: The SNP within an intron of the uronyl 2-sulphotransferase gene was associated with outcome at a genome-wide level of significance and with a very small posterior probability of being a false positive. Carriers of the minor A allele experienced less improvement of depression symptoms than carriers of the GG homozygote from week 4 onward. Study size: 312 Study population/ethnicity: Individuals with unipolar depression of at least moderate severity treated with nortriptyline. Type of association: GN] [GWAS:Response to antidepressants]

The wild type (normal) allele at this SNP is (C). The (T) variant indicates the presence of a non-wild type CYP2D6 variant, but it appears in many different variants so it can not be used to determine the presence of any particular variant. The most common variants it appears in are CYP2D6*10 and CYP2D6*4, but these are not the only ones. While this is the defining mutation for CYP2D6*10, it is not possible by itself for this mutation to determine a particular variant. In addition, the CYP2D6*4 variant includes this mutation, but the defining mutation 1846G>A SNP is not available in the common direct to consumer testing services. While it is not possible for this mutation to identify one particular variant, all the variants in which it appears have reduced or no CYP2D6 activity. If two ...

rs3813929, also known as -759C/T, is a SNP in the 5-hydroxytryptamine (serotonin) receptor 2C HTR2C gene. A study of 107 patients with schizophrenia being treated with olanzapine reported a protective effect against weight-gain from the (T) allele of this SNP; zero patients (of 28) with a rs3813929(T) allele had a body mass index increase of >=10% (p=0.002), whereas (C;C) homozygotes did. This effect may also involve nearby SNP rs518147. T allele showed borderline significant association with higher BMI and incidence of lifetime major depressive disorder among 4978 persons from the European Prospective Investigation into Cancer (EPIC)-Norfolk study, however, only the association with BMI remained borderline significant within the full EPIC-Norfolk cohort (20,981 persons) The association...

gwas, among 738 schizophrenics genotyped for 492K SNPs, this SNP attained a p-val of 3 x 10^-7 for total cholesterol as a result of olanzapine use

rs6318 (Cys23Ser / C23S or 68G>C / G68C) is a SNP within the serotonin 2C receptor HTR2C gene located on the X chromosome. Since it is located on the X chromosome, males will be hemizygous and either (C;-) or (G;-), whereas females will either homozygous (C;C) or (G;G) or heterozygous (C;G). In most of the studies cited below, heterozyous (C;G) females were roughly statistically equivalent to females carrying the common non-risk (G;G) genotype. One relatively large (4,000 men and 2,000 women) study published in late 2013 of Caucasian catheterization patients has studied the association between rs6318 genotype and risk of having an 'end' cardiac event, defined as either death or a heart attack, in the years following entry into the study (i.e. presumably following their catheterization)....

rs12248560(T) defines the CYP2C19*17 allele, an ultra fast metabolizer phenotype of the CYP2C19 gene. CYP2C19*17 is likely to lead to less effective drug treatment by, for example, proton pump inhibitors (such as omeprazole) and antidepressants. On the other hand, cancer patients who are CYP2C19*17 carriers are more likely to benefit from tamoxifen treatment, presumably because they break it down more rapidly into the antiestrogenic metabolites endoxifen and 4-hydroxytamoxifen. A study of 1,000+ breast cancer patients showed a 0.77x decreased risk of breast cancer for carriers of a CYP2C19*17 allele (CI: 0.65-0.93, p = 0.005). Analysis of a subgroup of such carriers who were using hormone therapy for ten years or longer showed an even stronger effect (odds ratio 0.57, CI: 0.39-0.83, p = 0....

rs4244285 is a SNP in the CYP2C19 gene, potentially encoding the CYP2C19*2 variant. This variant is the most common reason for poor metabolism of compounds like mephenytoin (an anti-convulsant), some antidepressants, the anti-platelet drug Plavix, and some drugs used for ulcer conditions of various types. The risk allele is rs4244285(A). As a nonfunctioning CYP2C19, this variant would be expected to be a poor metabolizer of several commonly prescribed drugs, including anti-ulcer drugs like omeprazole (trade names Losec and Prilosec), esomeprazole (trade name Nexium), and lansoprazole (trade name Prevacid). In Caucasians, SNPs in CYP2C19 are relatively rare (in contrast to SNPs in CYP2D6), but SNPs in this gene are common in Asians. Ulcer treatment with omeprazole to reduce Helicobacter pyl...

rs28399504 is a SNP in the CYP2C19 gene, potentially encoding the CYP2C19*4 variant. This variant has been linked to poor metabolism of compounds like mephenytoin. It is also known as M1V or Met1Val. The risk allele is rs28399504(G). As a nonfunctioning CYP2C19, this variant would be expected to be a poor metabolizer of several commonly prescribed drugs, including anti-ulcer drugs like omeprazole (trade names Losec and Prilosec), esomeprazole (trade name Nexium), and lansoprazole (Prevacid). According to a 23andMe discussion This is one of the SNPs which were re-analyzed April 2009. Customers with older data may wish to redownload. SNPs effected rs4420638, rs34276300, rs3091244, rs34601266, rs2033003, rs7900194, rs9332239, rs28371685, rs1229984, and rs28399504. Clopidogrel Efficacy [Pharm...

rs4986893 is a SNP in the CYP2C19 gene, potentially encoding the CYP2C19*3 variant. This variant has been linked to poor metabolism of compounds like mephenytoin as well as proguanil, and it therefore has implications for malaria prophylaxis. The risk allele is rs4986893(A). As a nonfunctioning CYP2C19, this variant would be expected to be a poor metabolizer of several commonly prescribed drugs, including anti-ulcer drugs like omeprazole (trade names Losec and Prilosec), esomeprazole (trade name Nexium), and lansoprazole (Prevacid). Clopidogrel Efficacy [PharmGKB:Curated In contrast to other PPIs, esomeprazole-induced healing of GERD appears to be unrelated to the CYP2C19*3 variant.] [OMIM:MEPHENYTOIN, POOR METABOLISM OF]

This SNP, a variant in the TP53 gene, is 1 of 25 SNPs reported to represent independently minor, but cumulatively significant, increased risk for breast cancer. For details of all 25 SNPs in this group, along with the two methods used to calculate overall risk estimates for breast cancer, refer to the SNPedia breast cancer entry. For this particular SNP, the G allele encodes an arginine at position 72 of the protein (where there's normally a proline), and the SNP is commonly called the Arg72 variant, although P72R and Arg72Pro are also common in the literature. Minor allele homozygotes, i.e. rs1042522(C;C) genotypes, live on average 3 years longer than major allele (G;G) homozygotes, based on a study of 9,200+ Danish individuals. The increased longevity is speculated to be related to the i...

rs4680 (Val158Met) is a well studied SNP in the COMT gene. 23andMe blog summarizes them as *rs4680(A) = Worrier. Met, more exploratory, lower COMT enzymatic activity, therefore higher dopamine levels; lower pain threshold, enhanced vulnerability to stress, yet also more efficient at processing information under most conditions *rs4680(G) = Warrior. Val, less exploratory, higher COMT enzymatic activity, therefore lower dopamine levels; higher pain threshold, better stress resiliency, albeit with a modest reduction in executive cognition performance under most conditions Roughly speaking, the predominant wisdom (known colloquially as the warrior/worrier hypothesis; summary at ) posits that people with Val alleles have increased COMT activity and lower prefrontal extracellular dopamine compar...

rs2235015 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs2032583 is near 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. rs2235015 has an r² value of >0.5 with this group. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported ...

rs2032583 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs2032583 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

rs4148740 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs4148740 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

rs11983225 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs11983225 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are kn...

rs12720067 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs12720067 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are kn...

rs2235040 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs2235040 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

rs2235067 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs2235067 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

rs4148739 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs4148739 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

rs10248420 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs10248420 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are kn...

rs7787082 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs7787082 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

rs2032583 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs2032583 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

SNP rs1057910(A), located in the cytochrome p450 CYP2C9 gene, most commonly encodes the amino acid isoleucine at position 359, and the resulting allele is also known as CYP2C9*1. rs1057910(C) encodes a leucine at this same position, and the resulting allele is called CYP2C9*3. This SNP is also known as Ile359Leu or A1075C. The effect of CYP2C9 variants on drug metabolism should not be predicted without also considering CYP2C9*2, defined as the common loss of function variant rs1799853(T) (NM_000771:c.430C>T, NP_000762:p.144R>C) Studies of the effects of these alleles include: * rs1057910(C;C)] genotypes may clear drugs like celecoxib (trade name Celebrex) twice as slowly as rs1057910(A;A) genotypes; the rs1057910(A;C) genotypes are in-between clearance rates. Lower clearance rates wi...

rs4680 (Val158Met) is a well studied SNP in the COMT gene. 23andMe blog summarizes them as *rs4680(A) = Worrier. Met, more exploratory, lower COMT enzymatic activity, therefore higher dopamine levels; lower pain threshold, enhanced vulnerability to stress, yet also more efficient at processing information under most conditions *rs4680(G) = Warrior. Val, less exploratory, higher COMT enzymatic activity, therefore lower dopamine levels; higher pain threshold, better stress resiliency, albeit with a modest reduction in executive cognition performance under most conditions Roughly speaking, the predominant wisdom (known colloquially as the warrior/worrier hypothesis; summary at ) posits that people with Val alleles have increased COMT activity and lower prefrontal extracellular dopamine compar...

rs4244285 is a SNP in the CYP2C19 gene, potentially encoding the CYP2C19*2 variant. This variant is the most common reason for poor metabolism of compounds like mephenytoin (an anti-convulsant), some antidepressants, the anti-platelet drug Plavix, and some drugs used for ulcer conditions of various types. The risk allele is rs4244285(A). As a nonfunctioning CYP2C19, this variant would be expected to be a poor metabolizer of several commonly prescribed drugs, including anti-ulcer drugs like omeprazole (trade names Losec and Prilosec), esomeprazole (trade name Nexium), and lansoprazole (trade name Prevacid). In Caucasians, SNPs in CYP2C19 are relatively rare (in contrast to SNPs in CYP2D6), but SNPs in this gene are common in Asians. Ulcer treatment with omeprazole to reduce Helicobacter pyl...

rs17238540, also known as SNP 29, is located in the HMG-CoA reductase HMGCR gene. The protein encoded by this gene is the target for drugs designed to inhibit its action, in order to lower cholesterol levels. SNPs in the HMGCR gene may affect how well such drugs (typically statins) work. In a study of ~1,500 patients treated with 40mg/d of pravastatin, rs17238540(G;T) heterozgyotes had a mean decrease in total cholesterol of 32.5 mg/dL (0.85 mmol/L), while the mean change for rs17238540(T;T) homozygotes was 41.8 mg/dL (1.09 mmol/L), a reduction in overall efficacy of 22.3% (absolute difference, 9.3 mg/dL, CI: 3.8-14.7 mg/dL, p<.001). The drop in total cholesterol was almost completely due to the decrease in LDL cholesterol, as there was no significant difference in the change in HDL cho...

rs17244841, also known as SNP 12, is located in the HMG-CoA reductase HMGCR gene. The protein encoded by this gene is the target for drugs designed to inhibit its action, in order to lower cholesterol levels. SNPs in the HMGCR gene may affect how well such drugs (typically statins) work. In a study of ~1,500 patients treated with 40mg/d of pravastatin, rs17244841(A;T) heterozgyotes had a mean decrease in total cholesterol of –32.8 mg/dL (–0.85 mmol/L), while the mean change for rs17244841(A;A) homozygotes was –42.0 mg/dL (–1.09 mmol/L), a reduction in overall efficacy of 21.8% (absolute difference, 9.2 mg/dL, CI: 3.8-14.6 mg/dL, p=.001). The drop in total cholesterol was almost completely due to the decrease in LDL...

rs4244285 is a SNP in the CYP2C19 gene, potentially encoding the CYP2C19*2 variant. This variant is the most common reason for poor metabolism of compounds like mephenytoin (an anti-convulsant), some antidepressants, the anti-platelet drug Plavix, and some drugs used for ulcer conditions of various types. The risk allele is rs4244285(A). As a nonfunctioning CYP2C19, this variant would be expected to be a poor metabolizer of several commonly prescribed drugs, including anti-ulcer drugs like omeprazole (trade names Losec and Prilosec), esomeprazole (trade name Nexium), and lansoprazole (trade name Prevacid). In Caucasians, SNPs in CYP2C19 are relatively rare (in contrast to SNPs in CYP2D6), but SNPs in this gene are common in Asians. Ulcer treatment with omeprazole to reduce Helicobacter pyl...

rs28399504 is a SNP in the CYP2C19 gene, potentially encoding the CYP2C19*4 variant. This variant has been linked to poor metabolism of compounds like mephenytoin. It is also known as M1V or Met1Val. The risk allele is rs28399504(G). As a nonfunctioning CYP2C19, this variant would be expected to be a poor metabolizer of several commonly prescribed drugs, including anti-ulcer drugs like omeprazole (trade names Losec and Prilosec), esomeprazole (trade name Nexium), and lansoprazole (Prevacid). According to a 23andMe discussion This is one of the SNPs which were re-analyzed April 2009. Customers with older data may wish to redownload. SNPs effected rs4420638, rs34276300, rs3091244, rs34601266, rs2033003, rs7900194, rs9332239, rs28371685, rs1229984, and rs28399504. Clopidogrel Efficacy [Pharm...

rs4986893 is a SNP in the CYP2C19 gene, potentially encoding the CYP2C19*3 variant. This variant has been linked to poor metabolism of compounds like mephenytoin as well as proguanil, and it therefore has implications for malaria prophylaxis. The risk allele is rs4986893(A). As a nonfunctioning CYP2C19, this variant would be expected to be a poor metabolizer of several commonly prescribed drugs, including anti-ulcer drugs like omeprazole (trade names Losec and Prilosec), esomeprazole (trade name Nexium), and lansoprazole (Prevacid). Clopidogrel Efficacy [PharmGKB:Curated In contrast to other PPIs, esomeprazole-induced healing of GERD appears to be unrelated to the CYP2C19*3 variant.] [OMIM:MEPHENYTOIN, POOR METABOLISM OF]

rs4244285 is a SNP in the CYP2C19 gene, potentially encoding the CYP2C19*2 variant. This variant is the most common reason for poor metabolism of compounds like mephenytoin (an anti-convulsant), some antidepressants, the anti-platelet drug Plavix, and some drugs used for ulcer conditions of various types. The risk allele is rs4244285(A). As a nonfunctioning CYP2C19, this variant would be expected to be a poor metabolizer of several commonly prescribed drugs, including anti-ulcer drugs like omeprazole (trade names Losec and Prilosec), esomeprazole (trade name Nexium), and lansoprazole (trade name Prevacid). In Caucasians, SNPs in CYP2C19 are relatively rare (in contrast to SNPs in CYP2D6), but SNPs in this gene are common in Asians. Ulcer treatment with omeprazole to reduce Helicobacter pyl...

rs28399504 is a SNP in the CYP2C19 gene, potentially encoding the CYP2C19*4 variant. This variant has been linked to poor metabolism of compounds like mephenytoin. It is also known as M1V or Met1Val. The risk allele is rs28399504(G). As a nonfunctioning CYP2C19, this variant would be expected to be a poor metabolizer of several commonly prescribed drugs, including anti-ulcer drugs like omeprazole (trade names Losec and Prilosec), esomeprazole (trade name Nexium), and lansoprazole (Prevacid). According to a 23andMe discussion This is one of the SNPs which were re-analyzed April 2009. Customers with older data may wish to redownload. SNPs effected rs4420638, rs34276300, rs3091244, rs34601266, rs2033003, rs7900194, rs9332239, rs28371685, rs1229984, and rs28399504. Clopidogrel Efficacy [Pharm...

rs4986893 is a SNP in the CYP2C19 gene, potentially encoding the CYP2C19*3 variant. This variant has been linked to poor metabolism of compounds like mephenytoin as well as proguanil, and it therefore has implications for malaria prophylaxis. The risk allele is rs4986893(A). As a nonfunctioning CYP2C19, this variant would be expected to be a poor metabolizer of several commonly prescribed drugs, including anti-ulcer drugs like omeprazole (trade names Losec and Prilosec), esomeprazole (trade name Nexium), and lansoprazole (Prevacid). Clopidogrel Efficacy [PharmGKB:Curated In contrast to other PPIs, esomeprazole-induced healing of GERD appears to be unrelated to the CYP2C19*3 variant.] [OMIM:MEPHENYTOIN, POOR METABOLISM OF]

rs4244285 is a SNP in the CYP2C19 gene, potentially encoding the CYP2C19*2 variant. This variant is the most common reason for poor metabolism of compounds like mephenytoin (an anti-convulsant), some antidepressants, the anti-platelet drug Plavix, and some drugs used for ulcer conditions of various types. The risk allele is rs4244285(A). As a nonfunctioning CYP2C19, this variant would be expected to be a poor metabolizer of several commonly prescribed drugs, including anti-ulcer drugs like omeprazole (trade names Losec and Prilosec), esomeprazole (trade name Nexium), and lansoprazole (trade name Prevacid). In Caucasians, SNPs in CYP2C19 are relatively rare (in contrast to SNPs in CYP2D6), but SNPs in this gene are common in Asians. Ulcer treatment with omeprazole to reduce Helicobacter pyl...

rs4986893 is a SNP in the CYP2C19 gene, potentially encoding the CYP2C19*3 variant. This variant has been linked to poor metabolism of compounds like mephenytoin as well as proguanil, and it therefore has implications for malaria prophylaxis. The risk allele is rs4986893(A). As a nonfunctioning CYP2C19, this variant would be expected to be a poor metabolizer of several commonly prescribed drugs, including anti-ulcer drugs like omeprazole (trade names Losec and Prilosec), esomeprazole (trade name Nexium), and lansoprazole (Prevacid). Clopidogrel Efficacy [PharmGKB:Curated In contrast to other PPIs, esomeprazole-induced healing of GERD appears to be unrelated to the CYP2C19*3 variant.] [OMIM:MEPHENYTOIN, POOR METABOLISM OF]

rs1801274 is a SNP in the Fc fragment of IgG, low affinity IIa, receptor (CD32) FCGR2A gene. rs1801274(C) encodes the arginine (R) allele, with the (T) allele encoding the variant histidine (H). The (H) isoform is considered high-binding to IgG2 and IgG3, while the (R) isoform is considered low-binding. This SNP is known in the literature by many names, including A519C and H131R. What's the importance of this? FcgR isoforms expressed on immune system cells have been linked to the pathogenic consequences triggered by autoantibodies or immune complexes in autoimmune diseases such as rheumatoid arthritis (RA) and systemic lupus erythematosus (SLE), as well as to the efficacy of some immunotherapeutic treatments such as rituximab. Many studies have been published about this FCGR2A SNP, roughly...

This SNP encodes a variation in the 33rd amino acid of the protein encoded by the TBX21 gene. Although 95% or so of all Caucasians carry two copies of the rs2240017(G) allele, as oriented in dbSNP orientation, and are thus rs2240017(G;G) homozygotes, a few individuals are rs2240017(C;G) heterozygotes. These heterozgotes are reported to improve better over time in response to corticosteroid treatment for asthma than the rs2240017(G;G) homozygotes. So far, studies have not linked, however, this SNP to any change in the overall risk of asthma itself. Although the effect observed was strong, in that treating rs2240017(C;G) heterozygotes ultimately (over 4 years) yields average airway responsiveness in the normal range (i.e. in the same range as for nonasthmatics), the authors point out that th...

rs8179183 is a SNP in the leptin receptor LEPR gene. In a study of 101 mostly Caucasian patients prescribed the atypical antipsychotic risperidone, carriers of a rs8179183(G) allele were less likely to gain significant weight compared to rs8179183(C;C) carriers, as assessed by physiogenomic analysis of corresponding weight profiles. Two other SNPs, rs6837793 and rs705381, were also significantly associated with weight profiles in these patients. [OMIM:LEPTIN RECEPTOR POLYMORPHISM]

rs8179183 is a SNP in the leptin receptor LEPR gene. In a study of 101 mostly Caucasian patients prescribed the atypical antipsychotic risperidone, carriers of a rs8179183(G) allele were less likely to gain significant weight compared to rs8179183(C;C) carriers, as assessed by physiogenomic analysis of corresponding weight profiles. Two other SNPs, rs6837793 and rs705381, were also significantly associated with weight profiles in these patients. [OMIM:LEPTIN RECEPTOR POLYMORPHISM]

rs6318 (Cys23Ser / C23S or 68G>C / G68C) is a SNP within the serotonin 2C receptor HTR2C gene located on the X chromosome. Since it is located on the X chromosome, males will be hemizygous and either (C;-) or (G;-), whereas females will either homozygous (C;C) or (G;G) or heterozygous (C;G). In most of the studies cited below, heterozyous (C;G) females were roughly statistically equivalent to females carrying the common non-risk (G;G) genotype. One relatively large (4,000 men and 2,000 women) study published in late 2013 of Caucasian catheterization patients has studied the association between rs6318 genotype and risk of having an 'end' cardiac event, defined as either death or a heart attack, in the years following entry into the study (i.e. presumably following their catheterization)....

rs1801028 is a SNP in the dopamine D2 receptor DRD2 gene. A meta-analysis comprising 27 samples and over 3,707 schizophrenia patients concluded that Cys/Ser heterozygotes, i.e. rs1801028(C;G) genotypes, were at elevated risk for schizophrenia when compared to either homozygote genotype (rs1801028(C;C) or rs1801028(G;G)). The odds ratio was 1.4 (p<0.005). An earlier meta-analysis comprising over 9,000 schizophrenia patients concluded pretty much the same thing: the Cys311 (rs1801028(G)) allele frequency led to an odds ratio of 1.43 (CI: 1.16-1.78, p<0.001) for this risk allele. A study of ~120 Chinese patients with schizophrenia concluded that Cys/Ser heterozygotes may not respond to risperidone treatment as well as Ser/Ser homozygotes. A paper has been published describing mistakes m...

rs1801274 is a SNP in the Fc fragment of IgG, low affinity IIa, receptor (CD32) FCGR2A gene. rs1801274(C) encodes the arginine (R) allele, with the (T) allele encoding the variant histidine (H). The (H) isoform is considered high-binding to IgG2 and IgG3, while the (R) isoform is considered low-binding. This SNP is known in the literature by many names, including A519C and H131R. What's the importance of this? FcgR isoforms expressed on immune system cells have been linked to the pathogenic consequences triggered by autoantibodies or immune complexes in autoimmune diseases such as rheumatoid arthritis (RA) and systemic lupus erythematosus (SLE), as well as to the efficacy of some immunotherapeutic treatments such as rituximab. Many studies have been published about this FCGR2A SNP, roughly...

rs2231142, also known as Q141K and C421A, is a SNP in the ABCG2 gene, indicating a missense variant. 'Our data indicate that at least 10% of all gout cases in whites are attributable to this causal variant.' A is the risk allele. A large study totaling 7,699 participants in the Framingham cohort and 4,148 participants in the Rotterdam cohort was conducted, with genome-wide significant SNPs then replicated in 11,000+ Caucasian and ~4,000 African-American individuals who took part in the study of Atherosclerosis Risk in Communities (ARIC). This study calculated an odds ratio of 1.74 for rs2231142 (CI: 1.51-1.99, p = 3.3x10e-15). A genetic score comprised of this SNP plus 2 others may stratify risk for gout. Among non-small cell lung cancer patients treated with gefitinib, there's a 4-5x high...

rs2032583 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs2032583 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

rs5443, a SNP in the G-protein beta3 subunit (GNB3) gene that is more commonly known as the C825T variant, has been linked to a number of metabolic conditions including obesity, coronary artery disease, insulin resistance and therefore diabetes, left ventricular hypertrophy, and hypertension. It has also been linked to how well a patient responds to Viagra (sildenafil). Several studies have been unable to replicate one or more of the associations in at least some populations between this SNP and these conditions. The more notable studies include: *rs5443(T) allele carriers are 2-3 fold more likely to be obese in Caucasian, Chinese, and African American populations. *rs5443(T) carriers are clearly at higher risk for hypertension, but this review indicates that whether they are also at incre...

[GWAS:Response to statin therapy]

rs17238540, also known as SNP 29, is located in the HMG-CoA reductase HMGCR gene. The protein encoded by this gene is the target for drugs designed to inhibit its action, in order to lower cholesterol levels. SNPs in the HMGCR gene may affect how well such drugs (typically statins) work. In a study of ~1,500 patients treated with 40mg/d of pravastatin, rs17238540(G;T) heterozgyotes had a mean decrease in total cholesterol of 32.5 mg/dL (0.85 mmol/L), while the mean change for rs17238540(T;T) homozygotes was 41.8 mg/dL (1.09 mmol/L), a reduction in overall efficacy of 22.3% (absolute difference, 9.3 mg/dL, CI: 3.8-14.7 mg/dL, p<.001). The drop in total cholesterol was almost completely due to the decrease in LDL cholesterol, as there was no significant difference in the change in HDL cho...

rs17244841, also known as SNP 12, is located in the HMG-CoA reductase HMGCR gene. The protein encoded by this gene is the target for drugs designed to inhibit its action, in order to lower cholesterol levels. SNPs in the HMGCR gene may affect how well such drugs (typically statins) work. In a study of ~1,500 patients treated with 40mg/d of pravastatin, rs17244841(A;T) heterozgyotes had a mean decrease in total cholesterol of –32.8 mg/dL (–0.85 mmol/L), while the mean change for rs17244841(A;A) homozygotes was –42.0 mg/dL (–1.09 mmol/L), a reduction in overall efficacy of 21.8% (absolute difference, 9.2 mg/dL, CI: 3.8-14.6 mg/dL, p=.001). The drop in total cholesterol was almost completely due to the decrease in LDL...

rs12248560(T) defines the CYP2C19*17 allele, an ultra fast metabolizer phenotype of the CYP2C19 gene. CYP2C19*17 is likely to lead to less effective drug treatment by, for example, proton pump inhibitors (such as omeprazole) and antidepressants. On the other hand, cancer patients who are CYP2C19*17 carriers are more likely to benefit from tamoxifen treatment, presumably because they break it down more rapidly into the antiestrogenic metabolites endoxifen and 4-hydroxytamoxifen. A study of 1,000+ breast cancer patients showed a 0.77x decreased risk of breast cancer for carriers of a CYP2C19*17 allele (CI: 0.65-0.93, p = 0.005). Analysis of a subgroup of such carriers who were using hormone therapy for ten years or longer showed an even stronger effect (odds ratio 0.57, CI: 0.39-0.83, p = 0....

rs6025 represents a SNP in the Factor V F5 gene, encoding a change in the protein from an arginine at position 506 to a glutamine. The resulting rs6025(A) allele encodes a mutation known as the Leiden mutation, R506Q, found in perhaps 3 to 5% of the individuals in most populations. About 1 in 10 individuals harboring the R506Q will experience clinically significant venous thromboembolism in their lifetimes (according to OMIM). Overall, the rs6025(A) allele appears to be necessary but not sufficient for the development of venous thromboembolism. Patients who are rs6025(A;G) heterozygotes but lack other risk-enhancing SNPs have a risk of recurrent deep venous thrombosis equal to patients with no such SNPs. In contrast, patients who are heterozygotes for both rs6025 and the prothrombin rs1799...

rs12762549 and rs11045585 can be used to predict whether docetaxel will induce leukopenia/neutropenia, according to a study of ~100 Japanese patients. When patients were classified into three groups by the scoring system based on the genotypes of these two SNPs, patients with a score of 1 or 2 were shown to have a significantly higher risk of docetaxel-induced leukopenia/neutropenia as compared to those with a score of 0 (P = 0.0000057; odds ratio [OR], 7.00; 95% CI [confidence interval], 2.95-16.59). This prediction system correctly classified 69.2% of severe leukopenia/neutropenia and 75.7% of non-leukopenia/neutropenia into the respective categories. [Effect percentages provided in table are raw population fractions taken from the referenced study based on rs11045585 only. Total populat...

rs2032583 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs2032583 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

rs5443, a SNP in the G-protein beta3 subunit (GNB3) gene that is more commonly known as the C825T variant, has been linked to a number of metabolic conditions including obesity, coronary artery disease, insulin resistance and therefore diabetes, left ventricular hypertrophy, and hypertension. It has also been linked to how well a patient responds to Viagra (sildenafil). Several studies have been unable to replicate one or more of the associations in at least some populations between this SNP and these conditions. The more notable studies include: *rs5443(T) allele carriers are 2-3 fold more likely to be obese in Caucasian, Chinese, and African American populations. *rs5443(T) carriers are clearly at higher risk for hypertension, but this review indicates that whether they are also at incre...

rs2032583 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs2032583 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

rs2032583 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs2032583 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

After taking Acetaminophen (Tylenol®), rs1467558(A;G) individuals have higher alanine aminotransferase (ALT) levels, a sign of liver toxicity, than do (G;G) homozygotes. More studies are needed; there was only 1 (A;A) individual, and he didn't show elevated ALT levels; furthermore, the ALT increases were 'modest' anyway for (A;G) individuals compared to (G;G). see also: 23andMe blog '''Note:''' the orientation of this SNP in SNPedia is as detailed in dbSNP, but in publications (including 23andMe's blog) the orientation is 'flipped', so what's (A;A) in dbSNP is (T;T) as discussed by the 23andMe blog.

rs2235015 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs2032583 is near 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. rs2235015 has an r² value of >0.5 with this group. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported ...

rs2032583 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs2032583 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

rs4148740 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs4148740 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are know...

rs11983225 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs11983225 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are kn...

rs12720067 is a SNP in the ABCB1 gene (also known as the MDR1 gene), which encodes a protein that transports certain molecules across the blood-brain barrier. SNPs in ABCB1 may thus influence the intracerebral concentrations of certain drugs and thus their efficacy or potential for adverse side effects. rs12720067 is one of 9 SNPs found within a tight linkage block (r² >= 0.8 ) such that the minor allele at any one of them predicts (with ~80%+ accuracy) that the other SNPs will also be the minor allele. The list of the 9 SNPs is shown below. When treated for depression with substrates of the protein encoded by ABCB1, carriers of one or two minor alleles at these ABCB1 SNPs have been reported to respond better than non-carriers. The antidepressant drugs that are kn...