Targeting the gut-brain axis: microbial interventions for neurological disorders

The pathogenesis of neurological disorders involves complex interactions among genetic, environmental, immunological, and metabolic factors. Characterized by high disability rates and prolonged disease courses, these conditions impose a significant burden on patients and society. As a dynamic and modifiable component of the internal environment, gut microbiota plays a central role in the onset and progression of neurological disorders through the "gut-brain axis." Bidirectional communication occurs between gut microbiota and the central nervous system via neural, immune, and endocrine pathways. This interplay regulates blood-brain barrier integrity, modulates neuroinflammatory responses, and maintains neurotransmitter balance, thereby influencing disease progression. This review systematically summarizes current evidence on the role of gut microbiota in representative neurological disorders, such as traumatic brain injury, stroke, and epilepsy, and critically evaluates the therapeutic potential of microbiota-targeted interventions, including fecal microbiota transplantation, ketogenic diets, and probiotics. Collectively, this review provides novel insights into disease pathogenesis and highlights innovative microbiome-based therapeutic strategies for the prevention and management of neurological diseases.