膳食纤维、肠道微生物与动物健康关系的研究进展OA

Gut microbiota plays a crucial role in animal digestion and absorption,immune regulation,and met-abolic homeostasis,forming a deep symbiotic relationship with the host.Their metabolic products can affect the function of distant organs.Dietary fiber,as a complex carbohydrate that cannot be degraded by the host's di-gestive enzymes but can be utilized by gut microbiota,has biological functions that depend on its interaction with the gut microbiota.The metabolic products such as short-chain fatty acids produced by the fermentation of dietary fiber by gut microbiota can affect the host's intestinal health,body metabolism,reproduction,develop-ment,and aging process by regulating the function of the intestinal epithelial barrier,immune response,and metabolic pathways.At the same time,the digestive capacity and immune status of the animal host also affect the utilization efficiency of dietary fiber and the structure of the gut microbiota.The imbalance of the dynamic symbiotic network,such as insufficient dietary fiber or gut microbiota dysbiosis,can lead to metabolic disor-ders,inflammatory responses,and the occurrence of various diseases.This article systematically expounded the dynamic symbiotic network formed among dietary fiber,gut microbiota,and animal hosts through the mecha-nism of"substrate supply-metabolic regulation-environmental adaptation",and deeply analyzed the complex interaction pathways among dietary fiber,gut microbiota and animal hosts,in order to provide a theoretical ba-sis for animal nutrition regulation and intestinal health management.[Chinese Journal of Animal Nutrition,2026,38(4):2401-2415]