Beyond maternal care: The effects of extra-maternal influences within the maternal environment on offspring

Samantha C Lauby1, Alison S Fleming2, Patrick O McGowan3

  • 1Department of Biological Sciences, University of Toronto Scarborough Campus, Scarborough, ON, Canada; Department of Cell and Systems Biology, University of Toronto, Toronto, ON, Canada.

Insights

Early life experiences, including maternal care and environmental factors like temperature, significantly shape offspring neurodevelopment and behavior. Epigenetic mechanisms play a key role in these persistent developmental programming effects.

Area of Science:

  • Neuroscience
  • Developmental Biology
  • Epigenetics

Background:

  • Early-life environment profoundly impacts offspring neuroendocrine function, neurotransmitter systems, and behavior.
  • Rodent models indicate maternal care influences offspring 'developmental programming' via epigenetic gene regulation.
  • Understanding epigenetic regulation is crucial for adaptation and altered developmental trajectories.

Purpose of the Study:

  • To discuss non-maternal factors influencing offspring developmental programming.
  • To highlight early-life temperature variations and genotype x environment interactions as key influences.
  • To provide recommendations for future research on early-life influences on brain and behavior.

Main Methods:

  • Review of accumulating evidence, including the authors' research.
  • Focus on epigenetic regulation as a biological mechanism.
  • Analysis of genotype x environment interactions and temperature variations.

Main Results:

  • Early-life maternal care is a significant factor in developmental programming.
  • Non-maternal factors, such as temperature and genotype, also exert direct or interactive influences.
  • These early-life factors lead to persistent changes in offspring brain and behavior.

Conclusions:

  • Early-life maternal care and extra-maternal influences are critical for long-term neurodevelopmental outcomes.
  • Future research should investigate the interplay of these factors.
  • Understanding these mechanisms is key to addressing developmental alterations.

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