Yazarlar : Lim U, Wilkens LR, Monroe KR, et al

Yayın : Int J Cancer

Pubmed Linki : http://www.ncbi.nlm.nih.gov/pubmed/22511254

Konu : Tıbbi Onkoloji

Literatür İçeriği :  

Abstract

Obesity is a leading contributor to colorectal cancer risk. We investigated whether the risk variants identified in genome-wide association studies of body mass index (BMI) and waist size are associated with colorectal cancer risk, independently of the effect of obesity phenotype due to a shared etiology. Twenty four SNPs in 15 loci (BDNF, FAIM2, FTO, GNPDA2, KCTD15, LYPLAL1, MC4R, MSRA, MTCH2, NEGR1, NRXN3, SEC16B, SH2B1, TFAP2B, and TMEM18) were genotyped in a case-control study of 2,033 colorectal cancer cases and 9,640 controls nested within the Multiethnic Cohort Study, as part of the Population Architecture using Genomics and Epidemiology (PAGE) consortium. Risk alleles for two obesity SNPs were associated with colorectal cancer risk - KCTD15 rs29941 [odds ratio (OR) for C allele = 0.90, 95% confidence interval (CI) 0.83-0.98; p = 0.01] and MC4R rs17782313 (OR for C allele = 1.12, 95% CI 1.02-1.22; p = 0.02). These associations were independent of the effect of BMI. However, none of the results remained significant after adjustment for multiple comparisons. No heterogeneity was observed across race/ethnic groups. Our findings suggest that the obesity risk variants are not likely to affect the risk of colorectal cancer substantially.

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