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Microbiota Signals during the Neonatal Period Forge Life-Long Immune Responses

Bryan Phillips-Farfán1, Fernando Gómez-Chávez2,3,4, Edgar Alejandro Medina-Torres5

  • 1Laboratorio de Nutrición Experimental, Instituto Nacional de Pediatría, México City 04530, Mexico.

International Journal of Molecular Sciences
|August 7, 2021
PubMed

Insights

The human microbiota influences early immune development and long-term health through microbial products like SCFAs and PSA. Understanding these molecules is key to managing immune responses and preventing disease.

Area of Science:

  • Immunology
  • Microbiology
  • Human Health

Background:

  • The gut microbiota plays a crucial role in the development of the human immune system, impacting health and disease throughout life.
  • Microbial metabolites, including short-chain fatty acids (SCFAs), formyl peptides (FPs), polysaccharide A (PSA), polyamines (PAs), sphingolipids (SLPs), and aryl hydrocarbon receptor (AhR) ligands, are key mediators of host-microbe interactions.

Purpose of the Study:

  • To elucidate the diverse roles of microbial products in regulating immunological development and host immunity.
  • To highlight the specific functions of various microbial metabolites in modulating immune responses from early life.

Main Methods:

  • Literature review and synthesis of existing research on microbial products and their immunological effects.
  • Analysis of the mechanisms by which SCFAs, FPs, PSA, PAs, SLPs, and AhR ligands interact with host immune pathways.

Main Results:

  • SCFAs, produced from fiber fermentation, exhibit anti-inflammatory properties.
  • PSA from B. fragilis modulates immune protein expression and cytokine production.
  • PAs are vital for neonatal immunity and gut-brain axis regulation.
  • SLPs act as signaling molecules in cell proliferation and immune regulation.
  • AhR ligands contribute to immune tolerance by interacting with immune cells.

Conclusions:

  • Microbial products are essential regulators of early immunological development with lasting health implications.
  • Targeting these microbial metabolites offers potential therapeutic strategies for immune-related disorders.

Keywords:
gut microbiotamicrobial metabolitesneonatal immune system

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