Rs6983267

From SNPedia

rs6983267 is a SNP on chromosome 8q24, associated with increased risk for prostate cancer in several studies. In studies dividing the 8q24 region, this SNP falls in region 3.

In a study of over 3,600 Caucasians with prostate cancer, rs6983267 is one of five SNPs used (with family history as a sixth factor) to cumulatively predict overall risk. On their own, the rs6983267(G;G) and (G;T) risk genotypes yield an odds ratio for developing prostate cancer of 1.37 (CI: 1.18-1.59, p=3.4-10e-5) and may account for 22.2% of population attributable risk.10.1056/NEJMoa075819

The increased risk of developing prostate cancer associated with rs6983267 now appears to be independent of the risk associated with it's close neighbor, rs1447295. The odds ratio for heterozygotes is estimated to be 1.26 (CI: 1.13 - 1.41), and for homozygotes, 1.58 (CI: 1.40 - 1.78), compared to the homozygote rs6983267(T;T) genotype. [PMID 17401363]

[1] The rs1447295 location could be responsible for about seven percent of prostate cancer cases in white men of north European descent. Thus, taken together with rs6983267, these two genetic changes could account for as much as one quarter of prostate cancer cases in white men. The increased risk conferred by these loci was observed for all age groups studied.

cancer related according to this blog

We estimate that the population attributable risk of the new locus, marked by rs6983267, is higher than the locus marked by rs1447295 (21% vs. 9%) [PMID 17826675]

In a study of 1,563 patients of European ancestry, this SNP was designated as the representative of a prostate cancer risk region termed "locus 2", with an odds ratio of 1.70 (CI: 1.39-2.07) for carriers of a risk genotype. Two other regions of chromosome 8q24 were also studied.[PMID 17925536]

In follow-up studies looking at disease severity (and not just overall risk), this SNP is reported to account for the risk (from region 3) of advanced prostate cancer. A meta-analysis of 10+ studies comprising over 15,000 prostate cancer patients concluded that the odds ratio for rs6983267(G) allele carriers is 1.25 (CI: 1.24-1.26).[PMID 18231127]]

A study of 561 patients with colon cancer has found that rs6983267(G;T) and (G;G) genotypes have an age-adjusted odds ratio of 1.39 (CI:1.03-1.88) and 1.68 (CI:1.21-2.33), respectively, for the development of that disease compared to (T;T) genotypes.[PMID 18268117]

[PMID 17618284] rs6983267 P = 1.27 x 10(-14) (allelic test) overall, with odds ratios (ORs) of 1.27 (95% confidence interval (c.i.): 1.16-1.39) and 1.47 (95% c.i.: 1.34-1.62) for heterozygotes and rare homozygotes, respectively with colorectal adenoma

[PMID 18056436]] associated with risk of colorectal cancer: Inheriting the risk variant at both this SNP and rs4779584 is estimated to increase the overall risk of developing colorectal cancer about 3 fold. The authors of this study are quoted as saying that "the lifetime risk [of bowel cancer] is about 5% in the UK so it's going up to 7% or so if you've got both bad copies of a variant." nature

[PMID 18362937] rs6983267 confirmed to increase risk for colorectal cancer in a study of 4,000 UK cases.

[PMID 18268117] rs6983267 confirmed to increase risk for colorectal cancer in a study of 561 patients.

[PMID 18535017] rs6983267 confirmed to increase risk for colorectal adenomas in a pooled analysis of 2,500+ cases.

[PMID 18990762] rs6983267 associated with smoking-related upper aerodigestive tract cancers including oropharynx and larynx, also lung cancer and liver cancer, but it was inversely associated with bladder cancer (OR 0.335, CI: 0.14-0.83).

[PMID 18726982] In a study of Japanese men, the rs6983267(G) allele did not show significant association with susceptibility to prostate cancer (PC vs. non-PC: p = 0.967, OR 1.00; CI: 0.83-1.21). However, it was associated with disease in non-aggressive PC (non-aggressive PC vs. normal controls: p = 0.0068, OR 1.43; CI: 1.10-1.85).

cancer-genetics these snps influence genetic risk for prostate cancer

• the haplotype rs6983267 rs1016343 rs4242384
• rs7501939
• rs1859962
• rs2660753
• rs9364554
• rs6465657
• rs10993994
• rs7931342
• rs2735839
• rs5945619
• rs10993994

GWAS
SNP	rs6983267
PubMedID	[PMID 17401363]
Condition	Prostate cancer
Gene	Intergenic
Risk Allele	G
pValue	9.00E-013
OR	1.26
95% CI	1.13-1.41