Affiliation:
1. School of Biotechnology and Biomolecular Sciences UNSW Sydney Sydney New South Wales Australia
2. Department of Medicine Faculty of Medicine University Malaya Kuala Lumpur Malaysia
3. Department of Paediatrics Faculty of Medicine University Malaya Kuala Lumpur Malaysia
4. Prince of Wales Clinical School Faculty of Medicine University of New South Wales Kuala Lumpur Malaysia
Abstract
AbstractBackgroundATG16L1 plays a fundamental role in the degradative intracellular pathway known as autophagy, being a mediator of inflammation and microbial homeostasis. The variant rs2241880 can diminish these capabilities, potentially contributing to inflammatory bowel disease (IBD) pathogenesis.ObjectivesTo perform an updated meta‐analysis on the association between ATG16L1 rs2241880 and IBD susceptibility by exploring the impact of age, ethnicity, and geography. Moreover, to investigate the association between rs2241880 and clinical features.MethodsLiterature searches up until September 2022 across 7 electronic public databases were performed for all case‐control studies on ATG16L1 rs2241880 and IBD. Pooled odds ratios (ORP) and 95% CI were calculated under the random effects model.ResultsOur analyses included a total of 30,606 IBD patients, comprising 21,270 Crohn's disease (CD) and 9336 ulcerative colitis (UC) patients, and 33,329 controls. ATG16L1 rs2241880 was significantly associated with CD susceptibility, where the A allele was protective (ORP: 0.74, 95% CI: 0.72–0.77, p‐value: <0.001), while the G allele was a risk factor (ORP: 1.23, 95% CI: 1.09–1.39, p‐value: 0.001), depending on the minor allele frequencies observed in this multi‐ancestry study sample. rs2241880 was predominantly relevant in Caucasians from North America and Europe, and in Latin American populations. Importantly, CD patients harbouring the G allele were significantly more predisposed to perianal disease (ORP: 1.21, 95% CI: 1.07–1.38, p‐value: 0.003).ConclusionsATG16L1 rs2241880 (G allele) is a consistent risk factor for IBD in Caucasian cohorts and influences clinical outcomes. As its role in non‐Caucasian populations remains ambiguous, further studies in under‐reported populations are necessary.
Funder
University of New South Wales
Pancare Foundation
Australian Government
Universiti Malaya
Cancer Australia
Subject
Gastroenterology,Oncology