title: Gene-diet interactions and their impact on colorectal cancer risk.
abstract: A number of studies have evaluated the role of gene-diet interaction in the etiology of colorectal cancer (CRC). Historically, these studies focused on established dietary risk factors and genes involved in their metabolism. However, results from these candidate gene studies were inconsistent, possibly due to multiple testing and publication bias. In recent years, genome-wide association studies have identified a number of CRC susceptibility loci, and subsequent meta-analyses have observed limited evidence that diet may modify the risk associated with these susceptibility loci. Statistical techniques have been recently developed to evaluate the presence of interaction across the entire genome; results from these genome-wide studies have demonstrated limited evidence of interaction and have failed to replicate results from candidate gene studies and those using established susceptibility loci. However, larger sample sizes are likely needed to elucidate modest or weak interaction in genome-wide studies of gene-diet interaction.
authors.affiliation: Department of Epidemiology, Harvard School of Public Health, Boston, MA, 02115.
authors.forename: Elizabeth D
authors.initials: ED
authors.lastname: Kantor
authors.affiliation: Department of Epidemiology, Harvard School of Public Health, Boston, MA, 02115 ; Department of Nutrition, Harvard School of Public Health, Boston, MA, 02115.
authors.forename: Edward L
authors.initials: EL
authors.lastname: Giovannucci
keywords: Diet; colorectal cancer; gene-environment interaction; genes; review
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