ArticleCommunications biology2025
TRIM2 inhibits apoptosis by ubiquitinating BNIP3 to protect the intestine against ischemia-reperfusion injury in mice.
Article in Communications biology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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Who cites it
1 citing paper in PubMed.
- TRIM47 drives metabolic reprogramming and tumor progression in Nasopharyngeal Carcinoma via K48-linked ubiquitination and degradation of SDHB.Cellular and molecular life sciences : CMLS · 2026Article
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Authors and funding
13 authors.
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Abstract
Intestinal damage following interrupted blood flow and its return (intestinal ischemia/reperfusion injury) is a serious medical problem occurring in various clinical situations. While the death of intestinal epithelial cells is a key factor, the precise reasons behind this cell death are not fully known. In this study, we identified significant downregulation of an E3 ubiquitin ligase TRIM2 in mouse models of this injury and in cells mimicking the condition. Genetic deletion of TRIM2 promotes intestinal apoptosis and worsens injury severity in studies using only male mice. We discovered that TRIM2 directly interacts with the pro-apoptotic protein Bcl2-interacting protein 3 (BNIP3) and mediates K48-linked polyubiquitination of BNIP3 at lysine 130 (K130), leading to its proteasomal degradation. Mutation of BNIP3 at K130 to arginine (K130R) abolished TRIM2-mediated ubiquitination, increased BNIP3 stability, and led to increased cell death after oxygen deprivation and restoration (hypoxia/reoxygenation). Increasing BNIP3 levels counteract the protective effect of boosting TRIM2 in intestinal epithelial cells, while lowering BNIP3 mimics the protection seen with more TRIM2. Therefore, TRIM2 protects against intestinal injury by inhibiting apoptosis through the ubiquitination and degradation of BNIP3. Targeting this TRIM2-BNIP3 axis offers possibilities for developing future treatments for intestinal ischemia/reperfusion injury.
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