Research Progress on the Changes of Intestinal Barrier and Possible Mechanism after Traumatic Central Nervous System Injury

Traumatic central nervous system injury can cause imbalance in intestinal microenvironmental homeostasis by disrupting intestinal barrier function, while the disturbed intestinal microenvironment can react on the central nervous system and aggravate the secondary injury of it. A large number of studies suggest that the intestinal barrier plays an important role in the pathophysiological process of traumatic central nervous system injury and can be an important target for the action of central nervous system injury. This paper reviews the structural and functional changes of intestinal microbial, chemical, mechanical and immune barriers after traumatic central nervous system injury and their bidirectional interaction with the central nervous system, summarizes the possible mechanisms leading to the disruption of intestinal barrier, including malnutrition, ischemia-reperfusion injury, inflammatory response and the release of neurotransmitters and hormones, to provide theoretical basis and new ideas for the development of research on the intestinal microenvironment after traumatic central nervous injury.