Summary
This study used a diet-induced obesity rat model to investigate mechanisms linking high-fat diet consumption to intestinal epithelial barrier dysfunction. Through metabolomic profiling and organoid assays, the authors identified uridine diphosphate (UDP) as a stool metabolite enriched under high-fat feeding that impairs epithelial regeneration via P2Y6 receptor signalling. P2Y6 antagonism reversed UDP-mediated epithelial dysfunction, suggesting a mechanistic link between diet-dependent metabolite production, barrier impairment, and obesity-associated inflammation.
Regional applicability
This is a mechanistic laboratory study in rats with in vitro validation; direct applicability to United Kingdom population nutrition or clinical practice requires human translational studies. The findings are relevant to understanding pathways underlying obesity-related metabolic dysfunction globally, but the UDP–P2Y6 axis would need confirmation in human studies to inform UK dietary or therapeutic interventions.
Key measures
Weight gain, oral glucose tolerance, blood lipopolysaccharide levels, junctional protein expression (Claudin-3, -4, Desmoglein-2), microbial phylogenetic diversity via 16S-rRNA sequencing, metabolomic profiling of stool, epithelial regeneration in organoid assays, P2Y6 receptor antagonism with MRS2578
Outcomes reported
The study identified uridine diphosphate (UDP) as a diet-derived metabolite enriched in high-fat diet stool samples that impairs intestinal epithelial regeneration through P2Y6 receptor signalling. Pharmacological P2Y6 inhibition attenuated UDP-induced epithelial regeneration loss, linking this mechanism to obesity-associated low-grade inflammation.
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