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Intestinal 'Infant-Type' Bifidobacteria Mediate Immune System Development in the First 1000 Days of Life

Chunxiu Lin1, Yugui Lin2, Heng Zhang3

  • 1State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China.

Nutrients
|April 12, 2022
PubMed

Insights

Early gut bacteria, especially Bifidobacteria, are crucial for educating the infant immune system during the first 1000 days. They promote immune tolerance and reduce inflammation, impacting long-term health.

Area of Science:

  • Microbiology
  • Immunology
  • Neonatal Health

Background:

  • Immune system development starts early, but the role of gut microbiota in neonatal immune education is understudied.
  • Bifidobacteria are key gut microbes in breastfed infants, metabolizing human milk oligosaccharides.
  • This metabolism influences the gut environment and stimulates neonatal immune maturation.

Purpose of the Study:

  • To review the role of infant-type Bifidobacterium species in educating the neonatal immune system.
  • To explore the mechanisms by which these bacteria induce immune tolerance and reduce intestinal inflammation.
  • To highlight the critical "first 1000 days" window for immune programming.

Main Methods:

  • Literature review focusing on Bifidobacteria and neonatal immunity.
  • Analysis of metabolic activities of Bifidobacteria, including short-chain fatty acid production.
  • Synthesis of current research on Bifidobacteria administration for immune health.

Main Results:

  • Infant-type Bifidobacteria play a vital role in educating the neonatal immune system.
  • These bacteria promote immune tolerance and suppress intestinal inflammation through specific mechanisms.
  • Metabolites like short-chain fatty acids are key mediators of these immune effects.

Conclusions:

  • The first 1000 days represent a critical period for Bifidobacteria to shape neonatal immunity.
  • Modulating gut microbiota with infant-type Bifidobacteria can prevent immune-mediated disorders.
  • Further research into these mechanisms can inform therapeutic strategies for infant immune health.

Keywords:
human milk oligosaccharidesimmune toleranceimmune-mediated disordersinfant-type bifidobacteriaintestinal inflammationintestinal microecologyneonatal immune systemsthe first 1000 days of life

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