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An overview of basic pathophysiological interactions between gut bacteria and their host.

Mathilde Simonson1,2, Thomas Simonson3, Estelle Nobécourt1,2

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Summary

The gut microbiome (GMB) aids digestion and immunity by breaking down fiber into metabolites that regulate host genes. GMB alterations are linked to diseases, highlighting its crucial role in health.

Keywords:
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Area of Science:

  • Microbiology
  • Human Physiology
  • Metabolomics

Background:

  • The human gut microbiome (GMB) comprises numerous bacterial species crucial for host physiology.
  • Commensal bacteria metabolize dietary fiber, producing compounds with dual chemical and signaling functions.
  • GMB plays a role in maintaining the intestinal barrier and modulating the host immune system.

Purpose of the Study:

  • To review the fundamental mechanisms of gut bacteria-host interactions.
  • To explore the role of gut bacteria metabolites in host gene regulation and homeostasis.
  • To examine the relationship between microbiome composition, dysbiosis, and immune modulation.

Main Methods:

  • Literature review of recent and seminal articles on GMB-host interactions.
  • Focus on gut bacteria, their metabolites, and their influence on host gene expression.
  • Analysis of microbiome composition, intestinal homeostasis, and immune responses.

Main Results:

  • Gut bacteria metabolites act as both chemical agents and signaling molecules.
  • Metabolites influence host gene expression, impacting physiology and homeostasis.
  • Gut microbiome composition and its alterations (dysbiosis) are linked to various pathologies.

Conclusions:

  • The GMB is integral to human health, influencing metabolism, immunity, and intestinal barrier function.
  • Understanding GMB-host metabolite interactions is key to addressing GMB-related diseases.
  • Further research into metabolite chemistry and host gene regulation is warranted.