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Target intelligence / Profile preview
Gastrointestinal microbiome–host immune system interaction
- Molecular classification
- Other (microbial ecosystem, immune system component)
01
Overview
The gastrointestinal microbiome–host immune system interaction refers to the complex, bidirectional relationship between the diverse community of microorganisms in the gastrointestinal tract (bacteria, viruses, fungi) and the host's immune system. The microbiome educates and shapes both innate and adaptive immunity, influencing responses to pathogens, inflammatory processes, and immune homeostasis. Microbial metabolites (such as short-chain fatty acids) and antigens modulate immune signaling, while the immune system, in turn, maintains microbiota composition and compartmentalization. Dysregulation of this axis is implicated in inflammatory, autoimmune, infectious, metabolic, and malignant diseases.
- Other names
- gut–immune axisgut microbiota–immune system interactiongut microbiome–immunity interfacegut–immune crosstalk
02
Mechanism of action
Modulate microbial composition and metabolites (short-chain fatty acids, tryptophan-derived molecules). Influence immune cell differentiation (Tregs, Th17, B cells, IgA production). Enhance or suppress inflammatory pathways. Interact with pattern recognition receptors (e.g., TLRs on immune cells).
03
Biological functions
Regulation of immune responseInflammatory signalingMaintenance of immune homeostasisNutrient metabolism and absorptionBarrier function (intestinal and immunological barriers)
04
Disease associations
Inflammatory diseases (e.g., IBD, Crohn's disease, ulcerative colitis)Autoimmune diseases (e.g., multiple sclerosis, type 1 diabetes)Metabolic diseases (e.g., obesity, diabetes)InfectionCancer (via immune modulation and inflammation)AllergyOther (immunodeficiency, neurodegeneration, cardiovascular disease)
05
Safety considerations
Risk of opportunistic infection with broad-spectrum antibioticsPotential exacerbation of autoimmunity with microbiome-immune imbalanceUnpredictable responses to microbiota-targeted interventionsRisk of transmitting pathogens with fecal transplants
06
Interacting drugs
Probiotics
5 more in the full profile.
07
Biomarkers
Microbiota composition (16S rRNA sequencing)Fecal short-chain fatty acid levelsSerum and fecal immunoglobulin A (IgA)Inflammatory cytokine levelsImmune cell profiling (e.g., Treg populations, Th17 responses)
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