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Related Experiment Videos

Photoprotection by melanin.

N Kollias1, R M Sayre, L Zeise

  • 1Wellman Laboratories of Photomedicine, Massachusetts General Hospital, Boston 02114.

Journal of Photochemistry and Photobiology. B, Biology
|May 1, 1991
PubMed
Summary
This summary is machine-generated.

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Epidermal melanin pigmentation (EMP) offers photoprotection, but its effectiveness varies by evaluation method. More research is needed on melanin

Area of Science:

  • Photobiology
  • Dermatology
  • Biochemistry

Background:

  • Melanin and epidermal melanin pigmentation (EMP) are key photoprotective agents.
  • Understanding melanin's interaction with UV radiation is crucial for skin health.
  • Current knowledge gaps exist regarding melanin's optical properties and quantitative measurement.

Purpose of the Study:

  • To summarize current information on melanin and EMP as photoprotective agents.
  • To review UV radiation attenuation methods and photoprotection efficacy.
  • To discuss the role of pigmentation in UV acclimatization and skin cancer incidence.

Main Methods:

  • Review of melanin chemistry, biochemistry, and UV interaction.
  • Analysis of UV attenuation mechanisms based on skin structure and constituents.

Related Experiment Videos

  • Evaluation of photoprotection using minimum erythema dose (MED) and skin cancer incidence as endpoints.

    • Main Results:

    • Epidermal melanin pigmentation (EMP) provides photoprotection, but its extent is endpoint-dependent.
    • Minimum erythema dose (MED) is a sensitive but impractical endpoint for photoprotection studies.
    • Skin cancer incidence is a sensitive endpoint, but studies are impractical for laboratory settings.

    Conclusions:

    • While EMP protects the skin, its efficacy varies significantly with the chosen evaluation endpoint.
    • Further research is required to determine melanin's absorption and scattering coefficients and refractive index.
    • Development of quantitative measurement methods for EMP is urgently needed.