Neurodevelopmental and Neurobiological Effects of Early Life Stress

Early life stress (ELS) encompasses a spectrum of adverse experiences during critical periods of brain maturation, including neglect, abuse and environmental deprivation. Such stressors can dysregulate the hypothalamic–pituitary–adrenal (HPA) axis, leading to prolonged elevations of stress hormones that interfere with neurotrophin signalling and epigenetic regulation. Structurally, ELS impedes myelination and alters dendritic complexity in regions such as the prefrontal cortex, hippocampus, amygdala and nucleus accumbens. Functionally, it perturbs inhibitory circuits and reward processing pathways, impairs sensory learning and fosters a pro-inflammatory milieu driven by microglial activation. These neurobiological alterations underpin increased susceptibility to mood disorders, cognitive decline and neurodegenerative disease across the life span. Insights from animal models and human imaging have begun to delineate sensitive windows for intervention, reveal sex-dependent vulnerabilities and highlight strategies—ranging from neuroendocrine modulation to circuit-specific therapies—that may ameliorate the enduring impact of early adversity.

Research from Nature Portfolio

Recent studies have identified a stress-sensitive projection linking the basolateral amygdala and nucleus accumbens that co-expresses gamma-aminobutyric acid (GABA) and corticotropin-releasing hormone (CRH). In mice exposed to ELS, this pathway undergoes maladaptive plasticity that suppresses reward-seeking behaviour; targeted inhibition of the projection restores normal reward responses, pointing to a precise circuit mechanism and potential therapeutic node. Complementing these findings, transcriptomic analyses of the ventral tegmental area, nucleus accumbens and prefrontal cortex demonstrate that ELS history primes distinct gene-expression programmes. These programmes involve regulators of synaptic plasticity and cortical maturation, and they amplify sensitivity to subsequent stress, offering a molecular framework for how early adversity shapes long-term behavioural outcomes.

Neurodevelopmental and Neurobiological Effects of Early Life Stress publication trend

The graph below shows the total number of articles in neurodevelopmental and neurobiological effects of early life stress across all publications each year (not limited to Nature Index journals).

Technical terms

Hypothalamic–pituitary–adrenal (HPA) axis: Hormonal cascade governing stress responses, from hypothalamic CRH release to adrenal corticosteroid secretion.

Corticotropin-releasing hormone (CRH): Neuropeptide that initiates the HPA-axis response to stress.

GABAergic interneurons: Inhibitory neurons releasing gamma-aminobutyric acid to regulate circuit excitability.

Epigenetic modifications: Chemical or structural changes to DNA or chromatin that alter gene expression without changing nucleotide sequence.

Microglia: Resident immune cells of the central nervous system that mediate neuroinflammatory responses.

References

1. The evolving neurobiology of early-life stress. Neuron (2025).
2. Stress-induced plasticity of a CRH/GABA projection disrupts reward behaviors in mice. Nature Communications (2023).
3. Early life stress alters transcriptomic patterning across reward circuitry in male and female mice. Nature Communications (2019).
4. Early life adversity as a risk factor for cognitive impairment and Alzheimer’s disease. Translational Neurodegeneration (2023).
5. Perceptual learning deficits mediated by somatostatin releasing inhibitory interneurons of olfactory bulb in an early life stress mouse model. Molecular Psychiatry (2023).