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Photoaging: pathogenesis, prevention, and treatment
S Kang1, G J Fisher, J J Voorhees
1Department of Dermatology, University of Michigan Medical Center, Ann Arbor, Michigan 48109, USA.
Clinics in Geriatric Medicine
|September 6, 2001
Summary
Sun exposure causes premature skin aging (photoaging), leading to wrinkles and skin damage. Topical tretinoin (all-trans retinoic acid) is effective for both treating and preventing photoaging.
Area of Science:
- Dermatology and photobiology, focusing on skin aging mechanisms.
Background:
- Premature skin aging, or photoaging, is primarily caused by cumulative ultraviolet (UV) radiation exposure.
- Clinically, photoaging manifests as wrinkles, uneven pigmentation, and loss of skin elasticity, with primary histologic changes in dermal connective tissue.
Purpose of the Study:
- To explain the mechanisms of UV-induced dermal damage in photoaging.
- To identify therapeutic targets for photoaging prevention.
- To summarize evidence on the preventative and therapeutic effects of topical tretinoin (all-trans retinoic acid).
Main Methods:
- Review of research on UV radiation's effects on skin.
- Analysis of studies elucidating photoaging pathophysiology.
- Examination of clinical and histological data from human volunteer studies.
Main Results:
- UV radiation induces significant dermal connective tissue alterations, leading to clinical signs of photoaging.
- Understanding photoaging mechanisms has identified key targets for prevention strategies.
- Topical tretinoin (all-trans retinoic acid) demonstrates efficacy in both treating and preventing photoaging.
Conclusions:
- Topical tretinoin is the only approved agent for photoaging treatment and shows preventative capabilities.
- Evidence from human studies supports tretinoin's role in managing UV-induced skin aging.