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Maternal care as a model for experience-dependent chromatin plasticity?
1Douglas Hospital Research Center, 6875 LaSalle Boulevard, Montréal, Québec H4H 1R3, Canada. michael.meaney@mcgill.ca
Trends in Neurosciences
|August 2, 2005
Summary
Maternal care significantly impacts offspring stress responses and gene expression, leading to lasting cognitive and behavioral changes. This environmental programming in rodents offers insights into potential human interventions.
Area of Science:
- Neuroscience
- Developmental Psychology
- Molecular Biology
Background:
- Maternal care quality influences long-term child development.
- Deprived environments can cause persistent cognitive and behavioral issues.
- Underlying mechanisms linking early life experiences to adult outcomes remain unclear.
Purpose of the Study:
- To explore the molecular mechanisms of environmental programming by maternal care.
- To understand how rodent maternal behavior alters offspring stress responses.
- To review the long-term implications and potential reversal of these effects.
Main Methods:
- Review of existing rodent studies on maternal behavior and offspring development.
- Analysis of molecular mechanisms, including gene expression and the hypothalamic-pituitary-adrenal axis.
- Discussion of environmental programming and its downstream effects.
Main Results:
- Rodent maternal behavior induces lasting changes in offspring stress reactivity.
- These changes are associated with stable alterations in gene expression ("environmental programming").
- The hypothalamic-pituitary-adrenal axis is a key pathway affected by this programming.
Conclusions:
- Environmental programming via maternal care has profound, long-lasting effects on offspring.
- Understanding these mechanisms in rodents may inform future human interventions.
- Reversal strategies for environmental programming are being explored in rodent models.