Epigenetic Mechanisms of Early Life Stress and Behavioral Outcomes
Summary
Early life stress can induce persistent epigenetic modifications in the developing brain, shaping long‐term behavioural trajectories. Mechanisms include alterations in DNA methylation, histone post‐translational modifications and non‐coding RNA expression that regulate key genes involved in stress responses, neurotrophic support and synaptic plasticity. Such modifications commonly target the glucocorticoid receptor gene, modulating hypothalamic–pituitary–adrenal axis sensitivity, as well as neurotrophic factors such as BDNF that govern neuronal growth and connectivity. Rodent models of maternal separation and human studies of childhood adversity converge on a model whereby environmental challenges during critical windows establish molecular “scars” in prefrontal and limbic circuits. These scars can manifest as anxiety, depression, cognitive impairments or altered social behaviours, and in some instances are transmitted across generations via germline and behavioural pathways. Understanding these epigenetic signatures offers avenues for early interventions and the development of biomarkers to predict vulnerability or resilience.
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Epigenetic Mechanisms of Early Life Stress and Behavioral Outcomes publication trend
The graph below shows the total number of articles in epigenetic mechanisms of early life stress and behavioral outcomes across all publications each year (not limited to Nature Index journals).
Technical terms
Epigenetics: Heritable changes in gene activity that do not depend on DNA sequence alterations.
DNA methylation: The covalent attachment of a methyl group to cytosine bases, often silencing gene expression.
Histone modification: Post‐translational chemical changes to histone proteins that influence chromatin structure and transcriptional activity.
MicroRNA (miRNA): Small non‐coding RNA molecules that regulate gene expression by targeting messenger RNAs.
Glucocorticoid receptor (NR3C1): A nuclear receptor that mediates cellular responses to stress hormones, affecting gene transcription.
Brain-derived neurotrophic factor (BDNF): A growth factor essential for neuronal development, synaptic plasticity and survival.
References
- The epigenome under pressure: On regulatory adaptation to chronic stress in the brain. Current Opinion in Neurobiology (2023).
- The Relationships Between Stress, Mental Disorders, and Epigenetic Regulation of BDNF. International Journal of Molecular Sciences (2020).
- Early Life Stress, Physiology, and Genetics: A Review. Frontiers in Psychology (2019).
- Sex-Specific and Strain-Dependent Effects of Early Life Adversity on Behavioral and Epigenetic Outcomes. Frontiers in Psychiatry (2013).
- Maternal Stress Induces Epigenetic Signatures of Psychiatric and Neurological Diseases in the Offspring. PLOS ONE (2013).
- Influence of Early Stress on Social Abilities and Serotonergic Functions across Generations in Mice. PLOS ONE (2011).
- Perinatal programming of emotional brain circuits: an integrative view from systems to molecules. Frontiers in Neuroscience (2014).
- Inheritable Effect of Unpredictable Maternal Separation on Behavioral Responses in Mice. Frontiers in Behavioral Neuroscience (2011).
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