Genetic and Epigenetic Influences on Stress-Related Disorders

Stress-related disorders such as depression, anxiety and post-traumatic stress arise from complex interactions between inherited genetic variation and environmentally driven epigenetic modifications. Core components include polymorphisms in genes that regulate the glucocorticoid receptor pathway, notably FKBP5, which encodes the co-chaperone FKBP51, and upstream regulators such as SKA2. Genetic variants can alter receptor sensitivity and gene expression dynamics, while epigenetic marks—principally DNA methylation—modulate transcriptional responsiveness to stress hormones. These mechanisms operate across multiple tissues, from the hypothalamic-pituitary-adrenal (HPA) axis to cortical and limbic brain regions, shaping hormone release, neuronal connectivity and synaptic plasticity. Ageing, early-life adversity and prolonged glucocorticoid exposure further sculpt the epigenome, reinforcing maladaptive stress circuits or, conversely, resilience. Advances in molecular profiling and cellular models have illuminated how gene–environment interplay drives individual vulnerability, suggesting avenues for targeted interventions and biomarkers of treatment response.

Research from Nature Portfolio

Recent studies have revealed that dysregulation of secretory autophagy in microglia, governed by SKA2 and FKBP5 signalling, amplifies interleukin-1β release and neuroinflammatory cascades, ultimately precipitating hippocampal neurodegeneration. This work provides mechanistic insight into how stress-axis genes intersect with innate immune processes in the brain. Additional investigations into major depressive disorder have demonstrated that a functional single-nucleotide polymorphism in intron 7 of FKBP5, coupled with allele-specific DNA methylation levels, predicts volumetric reductions in prefrontal, parietal and cingulate cortices. A foundational meta-analysis of common FKBP5 variants across tens of thousands of individuals has confirmed modest but reproducible associations between specific alleles and depression risk, underscoring the gene’s contribution to emotional regulation networks.

Genetic and Epigenetic Influences on Stress-Related Disorders publication trend

The graph below shows the total number of articles in genetic and epigenetic influences on stress-related disorders across all publications each year (not limited to Nature Index journals).

Technical terms

Epigenetics: heritable and dynamic modifications to chromatin or DNA that regulate gene expression without altering the nucleotide sequence.

DNA methylation: addition of methyl groups to cytosine residues in CpG dinucleotides, often leading to transcriptional repression.

Single-nucleotide polymorphism (SNP): a variation at a single base pair in the genome that can influence gene function or regulation.

FKBP5: gene encoding the co-chaperone protein FKBP51, which modulates glucocorticoid receptor sensitivity and stress responses.

HPA axis: hypothalamic-pituitary-adrenal axis, a central neuroendocrine system that orchestrates stress hormone release and adaptation to threat.

References

1. SKA2 regulated hyperactive secretory autophagy drives neuroinflammation-induced neurodegeneration. Nature Communications (2024).
2. DNA methylation patterns of FKBP5 regulatory regions in brain and blood of humanized mice and humans. Molecular Psychiatry (2024).
3. Associations of psychiatric disease and ageing with FKBP5 expression converge on superficial layer neurons of the neocortex. Acta Neuropathologica (2023).
4. Deep phenotyping reveals CRH and FKBP51-dependent behavioral profiles following chronic social stress exposure in male mice. Neuropsychopharmacology (2024).
5. Influence of FKBP5 polymorphism and DNA methylation on structural changes of the brain in major depressive disorder. Scientific Reports (2017).
6. Common variants in FKBP5 gene and major depressive disorder (MDD) susceptibility: a comprehensive meta-analysis. Scientific Reports (2016).