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Population‐Specific Susceptibility to Crohn's Disease and Ulcerative Colitis; Dominant and Recessive Relative Risks in the Japanese Population

Population‐Specific Susceptibility to Crohn's Disease and Ulcerative Colitis; Dominant and... Crohn's disease (CD), a type of chronic inflammatory bowel disease (IBD), is commonly found in European and East Asian countries. The calculated heritability of CD appears to be higher than that of ulcerative colitis (UC), another type of IBD. Recent genome‐wide association studies (GWAS) have identified more than thirty CD‐associated genes/regions in the European population. In the East Asian population, however, a clear association between CD and an associated gene has only been detected with TNFSF15. In order to determine if CD susceptibility differs geographically, nine SNPs from seven of the European CD‐associated genomic regions were selected for analysis. The genotype frequencies for these SNPs were compared among the 380 collected Japanese samples, which consisted of 212 IBD cases and 168 controls. We detected a significant association of both CD and UC with only the TNFSF15 gene. Analysis by the modified genotype relative risk test (mGRR) indicated that the risk allele of TNFSF15 is dominant for CD, but is recessive for UC. These results suggest that CD and UC susceptibility differs between the Japanese and European populations. Furthermore, it is also likely that CD and UC share a causative factor which exhibits a different dominant/recessive relative risk in the Japanese population. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Annals of Human Genetics Wiley

Population‐Specific Susceptibility to Crohn's Disease and Ulcerative Colitis; Dominant and Recessive Relative Risks in the Japanese Population

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References (55)

Publisher
Wiley
Copyright
Copyright © 2010 Wiley Subscription Services
ISSN
0003-4800
eISSN
1469-1809
DOI
10.1111/j.1469-1809.2010.00567.x
pmid
20367632
Publisher site
See Article on Publisher Site

Abstract

Crohn's disease (CD), a type of chronic inflammatory bowel disease (IBD), is commonly found in European and East Asian countries. The calculated heritability of CD appears to be higher than that of ulcerative colitis (UC), another type of IBD. Recent genome‐wide association studies (GWAS) have identified more than thirty CD‐associated genes/regions in the European population. In the East Asian population, however, a clear association between CD and an associated gene has only been detected with TNFSF15. In order to determine if CD susceptibility differs geographically, nine SNPs from seven of the European CD‐associated genomic regions were selected for analysis. The genotype frequencies for these SNPs were compared among the 380 collected Japanese samples, which consisted of 212 IBD cases and 168 controls. We detected a significant association of both CD and UC with only the TNFSF15 gene. Analysis by the modified genotype relative risk test (mGRR) indicated that the risk allele of TNFSF15 is dominant for CD, but is recessive for UC. These results suggest that CD and UC susceptibility differs between the Japanese and European populations. Furthermore, it is also likely that CD and UC share a causative factor which exhibits a different dominant/recessive relative risk in the Japanese population.

Journal

Annals of Human GeneticsWiley

Published: Jan 1, 2010

Keywords: ;

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