Autophagy, Barrier Function, and Beyond: The Science of Gut Integrity

In this episode of Lion’s Digest – Advances in GI and Hepatology, Dr. Matthew Coates sits down with Dr. Prashant Nighot to explore the intricate biology of autophagy, intestinal permeability, and tight junction regulation—and how these processes shape gastrointestinal and liver health.Dr. Nighot shares his expertise on how autophagy, the cell’s internal recycling and quality-control system, plays a critical role in maintaining epithelial integrity and barrier function. The discussion highlights how disruptions in autophagy can lead to increased gut permeability (“leaky gut”), altered tight junction dynamics, and downstream inflammation.The conversation dives into the translational relevance of this work, focusing on how these mechanisms contribute to the pathogenesis of inflammatory bowel disease and chronic liver disease. Dr. Nighot explains how impaired barrier function may serve as a key link between luminal factors, immune activation, and systemic disease.The episode also explores practical and emerging areas of interest, including the impact of fasting and exercise on autophagy pathways, and whether these interventions may have therapeutic implications. Dr. Nighot provides insights into his current research, including ongoing efforts to better understand how modulation of autophagy and tight junctions could lead to novel treatment strategies.This episode bridges basic science and clinical relevance, offering a compelling look at how cellular processes influence disease—and how they may be harnessed to improve patient outcomes.Topics discussed include:The fundamentals of autophagy and its role in cellular healthThe relationship between barrier dysfunction and inflammationImplications for IBD and liver diseaseThe effects of fasting and exercise on autophagyCurrent and future directions in translational research