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Updated: Jun 18, 2025
Accelerated Type 1 Diabetes Induction in Mice by Adoptive Transfer of Diabetogenic CD4+ T Cells
Published on: May 6, 2013
Does type 1 diabetes serve as a protective factor against inflammatory bowel disease: A Mendelian randomization study
Ke-Ke Tong1, Yun-Feng Yu1, Xin-Yu Yang2
1The First Hospital of Hunan University of Chinese Medicine, Changsha 410007, Hunan Province, China.
Background:
The impact of type 1 diabetes (T1D) on inflammatory bowel disease (IBD) remains unclear.
Aim:
To analyze the causal relationship between T1D and IBD using Mendelian ran-domization (MR).
Methods:
Single nucleotide polymorphisms were sourced from FinnGen for T1D, IBD, ulcerative colitis (UC) and Crohn's disease (CD). Inverse variance-weighted, MR-Egger, and weighted median tests were used to assess exposure-outcome causality. The MR-Egger intercept was used to assess horizontal pleiotropy. Co-chran's Q and leave-one-out method were used to analyze heterogeneity and sensitivity, respectively.
Results:
Our MR analysis indicated that T1D was associated with a reduced risk of IBD [odds ratio (OR): 0.959; 95% confidence interval (CI): 0.938-0.980; P < 0.001] and UC (OR: 0.960; 95%CI: 0.929-0.992; P = 0.015), with no significant association observed in terms of CD risk (OR: 0.966; 95%CI: 0.913-1.022; P = 0.227). The MR-Egger intercept showed no horizontal pleiotropy (P > 0.05). Cochran's Q and leave-one-out sensitivity analyses showed that the results were not heterogeneous (P > 0.05) and were robust.
Conclusion:
This MR analysis suggests that T1D serves as a potential protective factor against IBD and UC but is independent of CD.
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