The protective role of melanin against UV damage in human skin

Photochem Photobiol. 2008 May-Jun;84(3):539-49. doi: 10.1111/j.1751-1097.2007.00226.x.

Abstract

Human skin is repeatedly exposed to UVR that influences the function and survival of many cell types and is regarded as the main causative factor in the induction of skin cancer. It has been traditionally believed that skin pigmentation is the most important photoprotective factor, as melanin, besides functioning as a broadband UV absorbent, has antioxidant and radical scavenging properties. Besides, many epidemiological studies have shown a lower incidence for skin cancer in individuals with darker skin compared to those with fair skin. Skin pigmentation is of great cultural and cosmetic importance, yet the role of melanin in photoprotection is still controversial. This article outlines the major acute and chronic effects of UVR on human skin, the properties of melanin, the regulation of pigmentation and its effect on skin cancer prevention.

Publication types

  • Research Support, N.I.H., Intramural
  • Review

MeSH terms

  • Humans
  • Melanins / physiology*
  • Melanins / radiation effects
  • Radiation-Protective Agents*
  • Skin / radiation effects*
  • Skin Neoplasms / etiology
  • Skin Neoplasms / prevention & control*
  • Sunburn / etiology
  • Sunburn / prevention & control*
  • Ultraviolet Rays / adverse effects*

Substances

  • Melanins
  • Radiation-Protective Agents