Rs2308327

rs2308327, also known as K178R, is a SNP in the MGMT gene. The more common allele, rs2308327(A), encodes a lysine (K) at codon 178, while the (G) allele encodes an arginine (R).

In a pooled analysis of 200+ lung cancer patients, the rs2308327(G) allele was reported to provide a protective effect against lung cancer, and furthermore, more (G) alleles meant more protection, particularly for smokers. The odds ratios reported (p=0.003) were 0.67 (CI: 0.45-1.01) for heterozygotes, and 0.10 (CI: 0.01-0.94) for rs2308327(G;G) homozygotes.

In a study of 300+ colon cancer cases, rs2308327(G), in linkage disequilibrium with the previously reported MGMT Ile(143)Val rs2308321 SNP, had an inverse association with colorectal cancer risk (odds ratio 0.52, CI: 0.35-0.78, unadjusted p(trend) = 0.0003 for the additive model).