Autoimmune etiology of generalized vitiligo

I. C. Le Poole, R. M. Luiten

Research output: Chapter in Book/Report/Conference proceedingChapter

107 Scopus citations

Abstract

Vitiligo is characterized by progressive skin depigmentation resulting from an autoimmune response targeting epidermal melanocytes. Melanocytes are particularly immunogenic by virtue of the contents of their melanosomes, generating the complex radical scavenging molecule melanin in a process that involves melanogenic enzymes and structural components, including tyrosinase, MART-1, gp100, TRP-2 and TRP-1. These molecules are also prime targets of the immune response in both vitiligo and melanoma. The immunogenicity of melanosomal proteins can partly be explained by the dual role of melanosomes, involved both in melanin synthesis and processing of exogenous antigens. Melanocytes are capable of presenting antigens in the context of MHC class II, providing HLA-DR+ melanocytes in perilesional vitiligo skin the option of presenting melanosomal antigens in response to trauma and local inflammation. Type I cytokine-mediated immunity to melanocytes in vitiligo involves T cells reactive with melanosomal antigens, similar to T cells observed in melanoma. In vitiligo, however, T cell tuning allows T cells with higher affinity for melanocyte differentiation antigens to enter the circulation after escaping clonal deletion in primary lymphoid organs. The resulting efficacious and progressive autoimmune response to melanocytes provides a roadmap for melanoma therapy.

Original languageEnglish (US)
Title of host publicationDermatologic Immunity
EditorsBrian Nickoloff, Frank Nestle
Pages227-243
Number of pages17
DOIs
StatePublished - Aug 21 2008

Publication series

NameCurrent Directions in Autoimmunity
Volume10
ISSN (Print)1422-2132
ISSN (Electronic)1662-2936

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology
  • Biochemistry, Genetics and Molecular Biology(all)

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  • Cite this

    Le Poole, I. C., & Luiten, R. M. (2008). Autoimmune etiology of generalized vitiligo. In B. Nickoloff, & F. Nestle (Eds.), Dermatologic Immunity (pp. 227-243). (Current Directions in Autoimmunity; Vol. 10). https://doi.org/10.1159/000131485