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The "Direct Structural Disruption" Hypothesis: Bacteroides fragilis Toxin as a Potentiating Cofactor in MASH
Ju-Eun Hong1, Soonjae Hwang2,3
1Department of Biomedical Laboratory Science, College of Software Digital Healthcare Convergence, Yonsei University MIRAE Campus, Wonju 26493, Republic of Korea.
Toxins
|May 26, 2026
Summary
Enterotoxigenic Bacteroides fragilis toxin (BFT) may directly damage liver structural proteins, driving metabolic dysfunction-associated steatohepatitis (MASH) progression. This "Direct Structural Disruption" hypothesis offers a new therapeutic target for MASH.
Area of Science:
- Gut-liver axis research
- Microbial pathogenesis
- Hepatic steatosis and fibrosis
Background:
- Metabolic dysfunction-associated steatohepatitis (MASH) involves gut-liver axis dysregulation.
- Enterotoxigenic Bacteroides fragilis (ETBF) and its toxin (BFT) disrupt intestinal barriers.
- Systemic effects of BFT on liver pathology are under investigation.
Purpose of the Study:
- To propose the
- Direct Structural Disruption
- hypothesis for BFT's role in MASH.
- To explore BFT's potential to directly impair hepatic structural proteins.
- To identify BFT as a potential therapeutic target in MASH.
Main Methods:
- Review of existing literature on BFT, MASH, and gut-liver axis.
- Hypothesizing molecular mechanisms of BFT-induced liver damage.
- Discussion of diagnostic challenges for systemic BFT detection.
Main Results:
- BFT may systemically target hepatic structural proteins like cadherins.
- This disruption could amplify fibrogenic signaling and hepatic stellate cell activation.
- Current diagnostics face limitations due to BFT's homology with host metalloproteinases.
Conclusions:
- The ETBF-BFT axis is a potential driver of MASH progression via direct structural damage.
- Advanced diagnostics and liver-specific models are needed to validate this hypothesis.
- Targeting the ETBF-BFT axis may offer a novel therapeutic strategy for MASH.
Keywords:
Bacteroides fragilis toxin (BFT)enterotoxigenic Bacteroides fragilis (ETBF)gut–liver axishepatic stellate cells (HSCs)metabolic dysfunction-associated steatohepatitis (MASH)structural disruptionMore Related Videos
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