Gut Microbiome and Host Mucosal Immune System (Gut-Immune Axis) (Gut-Immune Axis)

The Gut Microbiome and Host Mucosal Immune System is a complex, bidirectional communication network essential for maintaining physiological homeostasis (Belkaid & Hand, 2014, Science). The gut microbiota, comprising trillions of microorganisms, interacts with the host's mucosal immune cells—such as dendritic cells, T cells, and B cells—to calibrate immune responses and prevent overreaction to commensal bacteria while maintaining vigilance against pathogens (Thursby & Juge, 2017, Biochem J). This interaction is primarily mediated through microbial-associated molecular patterns (MAMPs) and metabolites like short-chain fatty acids (SCFAs), which influence the differentiation of regulatory T cells and the production of secretory IgA (NIH, 2023). Dysbiosis, or an imbalance in this system, is linked to numerous inflammatory and metabolic diseases, including inflammatory bowel disease (IBD), obesity, and autoimmune disorders (PubMed, 2022). Therapeutic strategies targeting this axis include probiotics, prebiotics, and fecal microbiota transplantation (FMT), which aim to restore a healthy microbial-immune balance. Understanding this axis is critical for developing precision medicine approaches that leverage the microbiome to treat systemic inflammatory conditions.

Other names

Gut-Microbiota-Immune AxisMucosal Immune-Microbiome CrosstalkIntestinal Microbiome-Immune System AxisMicrobiota-Immune System Interaction

Modulation of the gut microbial composition to restore homeostasis; production of short-chain fatty acids (SCFAs) like butyrate which signal through GPR41/GPR43 to induce anti-inflammatory responses; competitive inhibition of pathogens; and regulation of mucosal T-cell trafficking.