Genetic architecture of the inflammatory bowel diseases across East Asian and European ancestries

  • Chinese Inflammatory Bowel Disease Genetics Consortium
  • , FinnGen
  • , International Inflammatory Bowel Disease Genetics Consortium
  • , Zhanju Liu*
  • , Ruize Liu
  • , Han Gao
  • , Seulgi Jung
  • , Xiang Gao
  • , Ruicong Sun
  • , Xiaoming Liu
  • , Yongjae Kim
  • , Ho Su Lee
  • , Yosuke Kawai
  • , Masao Nagasaki
  • , Junji Umeno
  • , Katsushi Tokunaga
  • , Yoshitaka Kinouchi
  • , Atsushi Masamune
  • , Wenzhao Shi
  • , Chengguo Shen
  • Zhenglin Guo
*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

126 Citations (Scopus)

Abstract

Inflammatory bowel diseases (IBDs) are chronic disorders of the gastrointestinal tract with the following two subtypes: Crohn’s disease (CD) and ulcerative colitis (UC). To date, most IBD genetic associations were derived from individuals of European (EUR) ancestries. Here we report the largest IBD study of individuals of East Asian (EAS) ancestries, including 14,393 cases and 15,456 controls. We found 80 IBD loci in EAS alone and 320 when meta-analyzed with ~370,000 EUR individuals (~30,000 cases), among which 81 are new. EAS-enriched coding variants implicate many new IBD genes, including ADAP1 and GIT2. Although IBD genetic effects are generally consistent across ancestries, genetics underlying CD appears more ancestry dependent than UC, driven by allele frequency (NOD2) and effect (TNFSF15). We extended the IBD polygenic risk score (PRS) by incorporating both ancestries, greatly improving its accuracy and highlighting the importance of diversity for the equitable deployment of PRS.

Original languageEnglish
Pages (from-to)796-806
Number of pages11
JournalNature genetics
Volume55
Issue number5
DOIs
Publication statusPublished - 8-May-2023

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