779-Microbio-Nicotinic Acid Regulate Colon Regional Identity

Paper Talk · Apr 11, 2026 · 21m

Research in Cell reveals that the biological identity of different colon regions is primarily established by the microbiome rather than being an inherent trait of intestinal stem cells. The study identifies nicotinic acid as a critical microbial metabolite concentrated in the proximal colon that triggers the PPARα signaling pathway to define local cellular characteristics. When the microbiome is depleted via antibiotics or in germ-free environments, this regional specialization is lost, leading to a more uniform and vulnerable intestinal lining. Restoring these microbial signals or the…