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Area of Science:

  • Neuroscience
  • Microbiology
  • Developmental Psychology

Background:

  • The gut microbiota-brain axis is crucial for development.
  • Early life is a critical window for brain and gut microbiota maturation.
  • Limited research explores these associations in young children.

Purpose of the Study:

  • To investigate associations between gut microbiota characteristics and cognition/temperament in children aged 0-3 years.
  • To analyze these associations at global (diversity), ecological (networks), and subject-wise levels.
  • To identify specific microbial features linked to cognitive and temperamental traits.

Main Methods:

  • Accelerated longitudinal design in typically developing children (0-3 years).
  • Analysis of gut microbiota: diversity measures, microbial networks, longitudinal trajectories.
  • Assessment of cognitive and temperamental development.

Main Results:

  • Associations between gut microbiota and cognition/temperament varied by analytical approach.
  • Diversity and network measures were mainly associated with cognition.
  • Subject-wise trajectories were primarily linked to temperament.
  • Ruminococcus bromii showed significant associations with multiple cognitive domains.
  • Interplay between language ability and social behaviors emerged.

Conclusions:

  • Gut microbiota composition and dynamics are associated with early cognitive and temperamental development.
  • Different analytical levels reveal distinct microbial associations.
  • Age-appropriate gut microbiota is vital for optimal early brain development.
  • Findings suggest a convergence on language and social behavior development.