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Light, including ultraviolet.

Emanual Maverakis1, Yoshinori Miyamura, Michael P Bowen

  • 1Department of Dermatology, School of Medicine, University of California at Davis, Sacramento, CA 95816, USA. emaverakis@yahoo.com

Journal of Autoimmunity
|December 19, 2009
PubMed
Summary
This summary is machine-generated.

Ultraviolet (UV) light impacts skin immunity, causing inflammation or acting as phototherapy. UV radiation

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Area of Science:

  • Dermatology
  • Immunology
  • Photobiology

Background:

  • Ultraviolet (UV) radiation significantly influences the skin's immune system.
  • UV exposure can trigger inflammatory responses, leading to allergies or autoimmune conditions.
  • Conversely, UV radiation serves as a phototherapy to mitigate specific immune reactions.

Purpose of the Study:

  • To review the multifaceted effects of UV radiation on the cutaneous immune system.
  • To elucidate the mechanisms behind UV-induced skin reactions, including inflammatory, autoimmune, and phototoxic responses.
  • To highlight the dual role of UV light in both pathogenic and therapeutic contexts within skin immunity.

Main Methods:

  • Review of existing literature on UV radiation and skin immunology.
  • Analysis of molecular and cellular mechanisms of UV-induced skin alterations.
  • Categorization of UV-induced skin reactions, focusing on immune system involvement.

Main Results:

  • UV radiation's effects stem from its ability to ionize molecules and chemically alter skin components.
  • UV exposure can induce DNA damage, leading to apoptosis or potentially exacerbating autoimmune responses.
  • UV radiation triggers keratinocytes to release cytokines and chemokines, recruiting immune cells and potentially causing photoallergic reactions.

Conclusions:

  • UV radiation profoundly impacts skin immunity through diverse chemical and cellular pathways.
  • Understanding these UV-induced reactions is crucial for managing skin conditions ranging from cancer to allergies and autoimmune diseases.
  • The dual nature of UV light necessitates careful consideration in both therapeutic applications and understanding disease pathogenesis.