The association of post-traumatic stress disorder with accelerated aging

Abstract

Post-traumatic stress disorder (PTSD) is increasingly recognized as a multisystem condition associated with accelerated biological aging. However, the heterogeneity of aging trajectories and causal mechanisms remain poorly defined. This commentary critically synthesizes evidence linking PTSD to telomere attrition, epigenetic age acceleration, chronic inflammation, and increased dementia risk, while emphasizing that most data are cross-sectional and causal inference is limited. We propose a working hypothesis of four hypothetical aging subtypes (telomere/inflammaging-dominant, epigenetic-dominant, neurodegeneration-dominant, and resilient) as a heuristic framework to guide future research. We argue that without recognizing this heterogeneity, translational efforts will remain suboptimal. The priority for future studies is longitudinal multi-biomarker designs with cluster analyses to empirically validate or refute the proposed subtypes. Effective interventions may mitigate these effects, but direct evidence for reversibility of biological aging markers is currently lacking.

Keywords: Post-traumatic stress disorder, accelerated aging, epigenetic clock, inflammaging, dementia