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The Human Microbiome before Birth.

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This summary is machine-generated.

The human microbiota is ancient and aids host health. Pregnancy alters the maternal microbiome, potentially impacting infant gut bacteria due to interventions like C-sections and antibiotics.

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Area of Science:

  • Microbiology
  • Human biology
  • Genetics

Background:

  • The human microbiota, a complex ecosystem of microorganisms, is conserved across hominids, suggesting co-evolution for host fitness.
  • The maternal microbiome undergoes significant shifts during pregnancy, preceding the crucial intergenerational transmission to the infant.
  • Factors such as maternal health and environmental exposures can influence the developing infant microbiome.

Purpose of the Study:

  • To investigate the evolutionary significance of the conserved human microbiota.
  • To understand the dynamic changes in the maternal microbiome during pregnancy.
  • To explore the potential impact of common perinatal interventions on the infant microbiome.

Main Methods:

  • Comparative genomic analysis of hominid microbiomes.
  • Longitudinal sampling and analysis of maternal and infant microbiomes.
  • Assessment of the effects of antibiotics and Cesarean sections on microbial composition.

Main Results:

  • Evidence supports an ancient, selected assembly of the microbiota optimized for host fitness.
  • Pregnancy-induced microbiome alterations precede the intergenerational transfer.
  • Peripartum antibiotic use and Cesarean delivery show potential for unintended consequences on infant microbial colonization.

Conclusions:

  • The conserved nature of the human microbiota highlights its deep evolutionary roots and importance for host health.
  • Pregnancy represents a critical window for microbial exchange and programming of the infant's immune system.
  • Careful consideration of perinatal interventions is necessary to mitigate potential long-term effects on infant microbiome development.