ACNE vulgaris is increasingly understood as an environmentally modulated inflammatory disease, with emerging evidence highlighting the role of the exposome in shaping disease onset, severity, and progression. This integrative framework captures the cumulative impact of environmental, lifestyle, psychosocial, and biological exposures across the lifespan, offering a broader lens for understanding acne beyond traditional pathophysiology.
Exposome and Acne Pathophysiology
The exposome encompasses a wide range of external and internal factors, including pollution, radiation, climate conditions, occupational exposures, diet, smoking, cosmetic use, and psychosocial stress. These influences interact dynamically with intrinsic biological systems, contributing to the heterogeneity and fluctuating course observed in acne vulgaris.
Central to this process is the sebaceous gland, described as a key sensor of exposomal signals. It integrates metabolic, immune, microbial, and neuroendocrine inputs, translating environmental exposures into inflammatory responses within the pilosebaceous unit. This positions the sebaceous gland as a critical mediator linking external triggers to clinical disease expression.
Molecular Mechanisms Linking Exposome to Acne
At the molecular level, genetic susceptibility and epigenetic reprogramming play a pivotal role in modulating individual responses to environmental exposures. Noncoding RNA networks further contribute by regulating inflammatory and metabolic pathways, enabling sustained responses to external stimuli.
Microbial ecosystems within the skin also interact with exposomal factors, influencing immune responses and contributing to acne development. Together, these mechanisms illustrate how environmental inputs are biologically embedded, leading to persistent inflammation and clinical manifestations.
Health Equity and Acne Outcomes
Beyond biological mechanisms, the exposome framework highlights the impact of social determinants of health on acne burden. Structural and socioeconomic inequalities can shape exposure to environmental risk factors, access to care, and ultimately disease severity.
This perspective underscores the importance of incorporating health equity into acne management strategies. Community-level prevention approaches, particularly those that are low cost and accessible, may help reduce disparities while complementing established therapeutic interventions.
Reference
Grafanaki K et al. Exposome involvement in the development of acne vulgaris. Front Immunol. 2026;17:1779036.
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