Promethease Report

rs4363657 is a SNP in the SLCO1B1 gene, a gene which encodes a protein involved in the liver's uptake of certain drugs, including the statins used to lower cholesterol levels. rs4363657 in nearly complete linkage disequilibrium with rs4149056 SNP (r<sup>2</sup>=0.97), which has been linked to statin metabolism. rs4149056(C) odds ratio for myopathy among 20,000 individuals taking either 40 or 80mg of simvastatin daily was 4.5 (CI: 2.6-7.7) per copy of the C allele, and 16.9 (CI: 4.7-61.1) in (C;C) as compared with (T;T) homozygotes. See also rs4149056 for a more detailed description of the effect of SLCO1B1 gene SNPs on the metabolism of many drugs.

[http://spittoon.23andme.com/2008/10/13/snpwatch-two-groups-discover-dna-variations-linked-to-male-pattern-baldness/ spitoon] rs2180439(T;T) have 2x increased odds of male pattern baldness.

This SNP influences skin pigmentation. The allele p.A111T, rs1426654(A), indicates light-skinned european ancestry. [PMID 16847698, PMID 16357253] It appears as if this SNP is a relatively new one in human evolution; one estimate is that the rs1426654(A) allele, in other words, light skin pigmentation, spread through the European population around 6,000 - 12,000 years ago. Prior to that, 'European ancestors' were most likely relatively brown-skinned.

rs4146894, a SNP in the PLEKHA1 gene, is associated with increased risk for age related macular degeneration based on a study of 118 Caucasians. The odds ratio for risk of AMD was 9.1 (CI: 4.0-20.9, p=0.0001) for the AA genotype and 2.6 (CI: 1.3-5.5, p=0.04) for the AG genotype. The risk is increased further by the status of two other chromosome 10 SNPs, rs10490924 and rs11200638.

This SNP, located in an intron of the LOXL1 gene, was initially reported to be associated with exfoliation glaucoma. However, it was shown in the same study to no longer be significant once two other SNPs, which cause actual changes in the LOXL1 protein, were identified. More specifically, the risk allele rs2165241(T) was found to be associated with glaucoma only because it effectively predicted (with 90% probability) the actual high-risk haplotype consisting of rs1048661(G) and rs3825942(C), as oriented with respect to their entries in dbSNP. rs2165241 was significantly associated with XFG and XFS (p=4.13x10e-9 for an additive model, heterozygote odds ratio = 4.42 (CI: 2.3-8.5), homozygote odds ratio = 34.19 (CI: 4.48-261), with the rs2165241 (T) allele being the risk allele, found in 8...

rs4149056 is a SNP in the SLCO1B1 gene, which encodes the 'organic anion transporting polypeptide 1B1' (OATP1B1) protein. This protein, found primarily in the liver, regulates the uptake of numerous drugs and natural compounds. The rs4149056(C) allele gives rise to an amino acid change (from valine to alanine at residue 174) which has reduced uptake/transport activity. Therefore, drugs metabolized by OATP1B1 tend to build up to higher circulating concentrations than they would otherwise.. The drugs known (or in some cases, thought) to be transported less well by the variant OATP1B1 protein encoded by the rs4149056(C) allele include: *Several cholesterol lowering statins, generally leading to reduced inhibitory effects on liver cholesterol synthesis and possibly worse side effects, by such ...

rs601338 is found on chromosome 19 in the alpha(1,2)-fucosyltransferase FUT2 gene. The wild-type rs601338(G) encodes the 'Secretor' (Se) allele, while rs601338(A) encodes the 'nonsecretor' (se) allele. A study of 115 Swedish adults concluded that rs601338(A;A) homozygotes have genetic immunity to infection by the Norwalk norovirus, a major (and contagious) cause of acute gastroenteritis worldwide among adults.(PMID 12692541) (PMID 16306606)

This SNP (C/T) is in 5' region of the HLA-C gene, 35 kb away from transcription initiation in or around the HLA-C gene. 'People with this tiny sequence variation, dubbed rs9264942, appear to have up to 90% less virus in their systems than those who carry other polymorphisms. About 10% of Europeans appear to carry two copies of rs9264942, which leads to an average 90% viral load reduction. About 50% of Europeans carry one copy, which gives a 60% reduction. By comparison, less than 40% of people of African descent appear to carry a single copy of the polymorphism.' [http://www.newscientist.com/article/dn12297-genetic-variation-may-lower-hiv-load-by-90.html Genetic variation may lower HIV load by 90%] They are referring to the (C;C) genotype giving a 90% reduction and the (C;T) giving a 60% r...

This SNP, in the ACTN3 gene, encodes a premature stop codon in a protein likely to be important in muscle function. The polymorphism alters position 577 of the alpha-actinin-3 protein, and while the most common nucleotide at this position, (C), encodes an arginine (amino acid code R), the stop codon is refered to as X. Hence, the SNP is referred to as R577X, with homozygotes being either RR or XX and heterozygotes being RX. The main report studying a relatively small number of Australian elite (ie ~Olympic) athletes found that, at least in females, the R allele (ie rs1815739(C)) is associated with sprinters, while the X allele (rs1815739(T)) is associated with endurance athletes. No female or Olympic-level sprinters were XX homozygotes (rs1815739(T;T)). The association tended the same way ...

rs6604026 has been reported in a large study to be associated with multiple sclerosis. The risk allele (oriented to the dbSNP entry) is (C); the odds ratio associated with this allele is 1.15 (CI 1.08-1.22).

[omim:PROSTATE CANCER, SUSCEPTIBILITY TO]

rs9886784, a intergenic SNP on chromosome 9, is reported to influence the risk for Alzheimer's disease based on a study of ~1100 Canadian patients. THe risk allele is (A); the odds ratio is 3.23 (CI: 1.79 - 5.84).

This SNP in the GABRA2 gene has been linked to Alcoholism. The effect of this SNP, a synonymous change at amino acid residue 132, is unknown, but it does not change the GABRA2 protein sequence. Carriers of at least one rs279858(G) allele respond slower to the effects of alcohol and are thereby apparently more prone to alcoholism than carriers of two rs279858(A) alleles. Finasteride, an FDA approved drug for the treatment of benign prostatic hypertrophy and a modulator of GABRA2, was shown to have more of a blocking effect on rs279858(A) homozygotes. Note that nearby SNPs have been grouped into a haplotype that shows statistically stronger association with alcohol dependence, namely the haplotype consisting of the rs279871(A) + rs279845(T) + rs279836(A) alleles . 1050 nicotine-dependent ca...

A large study of Caucasian children has identified this SNP in the TBX21 gene (and one other, rs16947078) as defining a haplotype associated with increased risk for allergic asthma. The odds ratio associated with rs11650354(T;T) homozygotes compared to rs11650354(C;C) homozygotes for allergic asthma is reported to be 8.13 (CI: 2.5-26.9). Heterozygotes may be at slightly higher risk.

rs10494366, a SNP in the NOS1AP gene encoding the nitric oxide synthase I protein, accounts for some of the variation seen in abnormal heart rhythms, in particular, the QT interval. Based on studies totaling ~4,000 individuals of Caucasian ancestry, homozygotes for one allele have shorter QT intervals, while homozygotes for the other allele have a longer QT interval. A follow-up study determined that one rs10494366(G) allele was associated with a 3.8-ms (CI: 3.0 - 4.6ms, p=7.8x10(-20)) increase in QT interval duration, and two (G) alleles had twice that increase. No increase in risk for sudden death due to a cardiac problem was associated with this SNP, though. rs10494366 minor homozygotes had a 9.3 msec longer QT interval compared to major homozygotes (p=5.7x10(-5)); rs10918594 minor h...

[http://www.nature.com/ng/journal/vaop/ncurrent/abs/ng2121.html nature] SNP rs1042725 is associated with height (P = 4E-8) in a study involving over 20,000 individuals. The gene harboring this SNP, HMGA2, is a strong biological candidate for having an influence on height, since rare, severe mutations in this gene are known to alter body size in mice and humans. rs1042725 is estimated to explain approx 0.3% of population variation in height in both adults and children (approx 0.4 cm increased adult height per C allele).

rs17576, also known as Gln279Arg or Q279R, is a SNP in exon 6 of the matrix metalloproteinase-9 MMP9 gene. The rs17576(G) allele encodes the Arg (R). In a study of 385 male veterans with greater than 20 pack-years of cigarette smoking, rs17576(G) allele carriers were at higher risk for chronic obstructive pulmonary disease (COPD). The rs17576(G;G) homozygous genotype was at 3-fold increased risk for COPD. A study of 744 Chinese patients with lung cancer found that the rs17576(G;G) genotype was associated with higher risk of lung cancer with metastasis (adjusted OR, 1.79, CI: 1.03-3.08) compared to the (A;A) genotype. rs17576 is also one of two SNPs in the MMP9 gene associated with increased risk for myocardial infarction, but not coronary artery disease. The relatively weak odds ratios for...

rs6457617 has been reported in a large study to be associated with rheumatoid arthritis. This SNP is reported to be the most statistically significant of many SNPs similarly located in the MHC region. The risk allele (oriented to the dbSNP entry) is (T); the odds ratio associated with heterozygotes is 2.36 (CI 1.97-2.84), and for homozygotes, 5.21 (CI 4.31-6.30).