The Impact of Gut Microbiota on Liver Diseases: Insights into Pathophysiology, Diagnosis, and Emerging Therapeutic Approaches

The gut microbiota plays a pivotal role in maintaining metabolic homeostasis and immune regulation, with its dysregulation increasingly recognized as a critical factor in the pathogenesis of liver diseases. This review explores the intricate interplay between gut microbial composition and liver health, focusing on the gut-liver axis as a key mediator. The disruption of gut barrier integrity and subsequent translocation of microbial products, such as lipopolysaccharides and short-chain fatty acids, contribute to the progression of liver disorders, including non-alcoholic fatty liver disease (NAFLD), alcoholic liver disease (ALD), and cirrhosis. The review also examines the implications of microbial dysbiosis in liver inflammation, fibrosis, and hepatocarcinogenesis, highlighting the diagnostic potential of microbiota profiling and biomarkers. Finally, emerging therapeutic strategies, such as probiotics, prebiotics, fecal microbiota transplantation, and precision microbiome editing, are discussed as promising avenues for intervention. Understanding the bidirectional relationship between the gut microbiota and the liver offers novel insights into disease mechanisms and opens the door for innovative therapeutic approaches in hepatology.