# The role of Clostridium butyricum and its metabolites in modulating gut mucosal immunity: implications for viral infections and inflammatory diseases

## TL;DR

This review explores how Clostridium butyricum and its metabolites boost gut immunity, offering potential treatments for viral and inflammatory diseases.

## Contribution

The paper introduces a new 'gut-centric hypothesis' linking probiotic action to antiviral immunity through C. butyricum.

## Key findings

- C. butyricum enhances mucosal immunity via short-chain fatty acids and interferon induction.
- The bacterium modulates inflammasome signaling and regulatory immune populations.
- It shows therapeutic promise for viral infections and inflammatory conditions.

## Abstract

With global viral emergence and increasing antiviral resistance, there is an urgent need for innovative immunomodulatory strategies. Gut microbiota modulation has gained attention as a promising therapeutic approach. Clostridium butyricum (C. butyricum) plays a pivotal role in shaping microbial composition, preserving intestinal barrier integrity, and enhancing mucosal immunity. Its major metabolites, short-chain fatty acids (SCFAs), further strengthen mucosal defenses and exert antiviral and anti-inflammatory effects. This review proposes a unified “gut-centric hypothesis” that intestinal barrier integrity, microbial homeostasis, and mucosal immune balance collectively determine the host’s resilience to viral invasion and inflammation. The collective findings delineate a mechanistic axis whereby C. butyricum orchestrates antiviral and anti-inflammatory immunity through the induction of type I/III interferons, modulation of inflammasome signaling, and expansion of regulatory immune populations, reinforcing its therapeutic promise. This review provides a new conceptual framework linking probiotic action to antiviral immunity, identifying C. butyricum as a potential next-generation microbial therapeutic for viral and inflammatory diseases.

Infographic showing a gut barrier cross-section in the center with signaling pathways involving Clostridium butyricum, immune cells, and butyrate production. The outer ring illustrates ten organs and related diseases, including lungs with pneumonia, blood vessel with vasculitis, pancreas with acute pancreatitis, brain with Alzheimer's disease, muscles and bones with arthritis, skin with herpes simplex, intestine with inflammatory bowel disease, liver with steatohepatitis, reproductive organ with HIV, and kidneys with nephrotic syndrome. Text and icons detail the gut-immune-organ axis and diseases linked to barrier impairment.