What the study found
The study found that intestinal epithelial cells and the mucosal barrier were disrupted during experimental autoimmune encephalomyelitis (EAE, a mouse model used to study multiple sclerosis). This disruption was associated with inhibition of mitochondrial oxidative phosphorylation, or OXPHOS, the process cells use to make energy.
Why the authors say this matters
The authors conclude that their findings suggest a potential mechanism by which gut microbiota dysbiosis in EAE mice compromises intestinal epithelial integrity and disrupts the mucosal barrier. They also connect this to bowel syndrome in multiple sclerosis, which they describe as a prevalent and debilitating symptom that impairs quality of life.
What the researchers tested
The researchers used a multi-omics approach, including proteomic analysis and metabolomic analysis. They examined small intestinal epithelial cells and cecal contents from EAE mice to look for changes in OXPHOS-related proteins and microbial metabolites.
What worked and what didn't
Proteomic analysis showed altered OXPHOS complexes, with a pronounced decrease in cytochrome c oxidase and ATP synthase subunits in small intestinal epithelial cells. Metabolomic analysis found an enrichment of phenyllactic acid, a phenolic acid typically produced by Lactobacillus murinus, in the cecal contents of EAE mice. The findings indicate that phenyllactic acid downregulates OXPHOS protein complexes and restrains maximal mitochondrial respiration.
What to keep in mind
The abstract describes findings from experimental autoimmune encephalomyelitis, not from human patients. The available summary does not describe additional experimental limitations or whether the mechanism was tested beyond the mouse model.
Key points
- Intestinal epithelial cells and the mucosal barrier were disrupted during EAE induction.
- The disruption was linked to inhibition of mitochondrial oxidative phosphorylation (OXPHOS).
- Cytochrome c oxidase and ATP synthase subunits were decreased in small intestinal epithelial cells.
- Phenyllactic acid was enriched in the cecal contents of EAE mice.
- The study indicates that phenyllactic acid downregulates OXPHOS complexes and reduces maximal mitochondrial respiration.
Disclosure
- Research title:
- Microbial metabolite linked to epithelial damage in EAE
- Authors:
- Eunike Tiffany, Panida Sittipo, Chanyoung Lee, Ju Yeon Lee, Soojin Lee, Yun Kyung Lee
- Institutions:
- Burapha University, Chungnam National University, Korea Basic Science Institute, Soonchunhyang University, Soonchunhyang University, Soonchunhyang University, Soonchunhyang University
- Publication date:
- 2026-02-26
- OpenAlex record:
- View
Get the weekly research newsletter
Stay current with peer-reviewed research without reading academic papers — one filtered digest, every Friday.