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Understanding the interaction between melatonin and bifidobacteria.

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Human milk

Keywords:
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Area of Science:

  • Microbiology
  • Human Physiology
  • Molecular Biology

Background:

  • The gut microbiota, a complex microbial community, forms at birth and is influenced by factors like breastfeeding.
  • Human milk contains melatonin, a hormone crucial for regulating sleep-wake cycles and establishing circadian rhythms in newborns.
  • Understanding the interaction between milk components and infant gut microbes is vital for infant health.

Purpose of the Study:

  • To investigate the molecular interactions between human melatonin and bifidobacteria-rich infant gut microbiota.
  • To explore how melatonin influences the function and gene expression of infant gut bacteria.

Main Methods:

  • Utilized in vitro assays to assess molecular communication.
  • Employed functional genomic approaches to analyze microbial responses.

Main Results:

  • Melatonin induced distinct functional impacts on bifidobacterial species at both transcriptional and phenotypic levels.
  • Observed species-dependent effects of melatonin on microbial adhesion to intestinal cells.

Conclusions:

  • Bifidobacterium bifidum exhibited the most significant molecular interaction with melatonin among the tested bifidobacterial taxa.
  • Melatonin plays a key role in modulating the infant gut microbiota composition and function, particularly through interactions with specific bifidobacteria.