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Pigmentation01:19

Pigmentation

The color of the skin is influenced by a number of pigments, including melanin, carotene, and hemoglobin. Recall that melanin is produced by cells called melanocytes, which are found scattered throughout the stratum basale of the epidermis. The melanin is transferred to the keratinocytes via melanosomes.
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Pharmacologic Induction of Epidermal Melanin and Protection Against Sunburn in a Humanized Mouse Model
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Published on: September 7, 2013

Hereditary photodermatoses.

Dennis H Oh1, Graciela Spivak

  • 1Department of Dermatology, University of California at San Francisco, USA.

Advances in Experimental Medicine and Biology
|August 7, 2010
PubMed
Summary
This summary is machine-generated.

Photodermatoses are abnormal skin reactions to sunlight. This chapter details hereditary conditions causing photosensitivity, including DNA repair defects and UV-sensitive syndrome.

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Area of Science:

  • Dermatology
  • Genetics
  • Photobiology

Background:

  • Photodermatoses involve abnormal skin reactions to sunlight (photons).
  • Causes include DNA repair defects, chemical/drug interactions, and immune responses.
  • Hereditary conditions significantly contribute to photodermatoses.

Purpose of the Study:

  • To describe photodermatoses associated with hereditary conditions.
  • To categorize these hereditary photodermatoses.
  • To highlight UV-sensitive syndrome.

Main Methods:

  • Review of literature on hereditary photodermatoses.
  • Classification based on underlying causes (metabolic, idiopathic, genetic).
  • Focus on DNA repair pathways and cancer suppressor genes.

Main Results:

  • Hereditary photodermatoses are classified into metabolic, idiopathic, and genetic groups.
  • Genetic causes include DNA repair pathway abnormalities and cancer suppressor gene defects.
  • UV-sensitive syndrome is a recently identified condition.

Conclusions:

  • Hereditary factors play a crucial role in photodermatoses.
  • Understanding these genetic links is vital for diagnosis and management.
  • Further research into conditions like UV-sensitive syndrome is warranted.