Common Genetic Variants Account for Differences in Gene Expression Among Ethnic Groups

Overview

Journal Nat Genet

Specialty Genetics

Date 2007 Jan 9

PMID 17206142

Citations 264

Authors

Richard S Spielman

Laurel A Bastone

Joshua T Burdick

Michael Morley

Warren J Ewens

Vivian G Cheung

Affiliations

Soon will be listed here.

Abstract

Variation in DNA sequence contributes to individual differences in quantitative traits, but in humans the specific sequence variants are known for very few traits. We characterized variation in gene expression in cells from individuals belonging to three major population groups. This quantitative phenotype differs significantly between European-derived and Asian-derived populations for 1,097 of 4,197 genes tested. For the phenotypes with the strongest evidence of cis determinants, most of the variation is due to allele frequency differences at cis-linked regulators. The results show that specific genetic variation among populations contributes appreciably to differences in gene expression phenotypes. Populations differ in prevalence of many complex genetic diseases, such as diabetes and cardiovascular disease. As some of these are probably influenced by the level of gene expression, our results suggest that allele frequency differences at regulatory polymorphisms also account for some population differences in prevalence of complex diseases.

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