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A bile acid blueprint for early-life immune tolerance

Jielong Guo1, Changtao Jiang1

  • 1Department of Immunology, School of Basic Medical Sciences, State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing 100191, China.

Cell Reports
|July 20, 2026
PubMed

Insights

Neonates enriched hyocholic acids, crucial for immune tolerance and gut microbiota development. This promotes protection against inflammatory diseases in early life.

Area of Science:

  • Immunology
  • Microbiology
  • Metabolomics

Background:

  • Early life immune tolerance is critical but not fully understood.
  • Gut microbiota plays a key role in immune system development.
  • Factors influencing early life immune establishment require further investigation.

Purpose of the Study:

  • To investigate the role of specific metabolites in establishing immune tolerance during early life.
  • To understand the impact of these metabolites on gut microbiota colonization.
  • To explore their potential in preventing inflammatory diseases.

Main Methods:

  • Analysis of neonatal metabolites, specifically bile acids.
  • Assessment of gut microbiota composition in neonates.
  • Evaluation of immune responses and susceptibility to inflammatory conditions.

Main Results:

  • Neonates showed selective enrichment of hyocholic acids.
  • Hyocholic acid enrichment promoted immune tolerance establishment.
  • These acids supported normal gut microbiota colonization, conferring protection against inflammation.

Conclusions:

  • Hyocholic acids are key mediators in establishing neonatal immune tolerance.
  • Metabolite-microbiota interactions are vital for early life immune health.
  • Targeting bile acid metabolism may offer therapeutic strategies for inflammatory diseases.

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