From Lasers to Longevity: Exploring Energy-Based Devices as Senotherapeutic Tools in Dermatology

Background: Cutaneous aging is a multifactorial process, increasingly understood through the lens of cellular senescence, a state of stable cell cycle arrest accompanied by a pro-inflammatory secretory phenotype that disrupts tissue homeostasis. Recent research has highlighted the accumulation of senescent dermal fibroblasts as a key contributor to age-related skin changes, including loss of elasticity, collagen degradation, and impaired regeneration. Objective: This review explores the emerging hypothesis that energy-based devices (EBDs), particularly lasers, may act as senotherapeutic tools by targeting cellular senescence pathways in aging skin. We examine the molecular and histological effects of laser therapy in relation to known biomarkers of senescence and evaluate their potential role in regenerative dermatology. Methods: We conducted a review of published studies on fractional lasers, red-light therapies, and other EBDs, focusing on their impact on fibroblast activity, extracellular matrix remodeling, and senescence-associated markers such as p16INK4a, p21Cip1, telomerase, and SASP-related cytokines. Comparative analysis with pharmacologic senotherapeutics was also performed. Results: Preclinical and clinical data suggest that specific EBDs can modulate dermal aging at the molecular level by enhancing mitochondrial activity, increasing type III collagen synthesis, reducing senescence-related gene expression, and promoting fibroblast turnover. In contrast to systemic senolytics, lasers provide localized and titratable interventions with a favorable safety profile. Conclusions: Energy-based devices, particularly fractional lasers and red-light systems, hold promise as non-invasive senotherapeutic interventions in dermatology. By modulating senescence-associated pathways, EBDs may offer not only cosmetic improvement but also biological rejuvenation. Further mechanistic studies and biomarker-based trials are warranted to validate this paradigm and refine treatment protocols for longevity-oriented skin therapies.