alexa Abnormal expression of MHC class II and ICAM-1 by melanocytes in vitiligo.
Biochemistry

Biochemistry

Biochemistry & Analytical Biochemistry

Author(s): al Badri AM, Foulis AK, Todd PM, Gariouch JJ, Gudgeon JE,

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Abstract The relationship between damage to cutaneous melanocytes and antimelanocyte autoimmunity in vitiligo is unclear. We have demonstrated abnormal expression of MHC class II molecules by perilesional melanocytes in 13/21 patients with vitiligo and a six-fold increase in the number expressing the intercellular adhesion molecule ICAM-1. These molecules have important roles in normal antigen presentation and activation of helper T lymphocytes, and their expression by melanocytes may contribute to the abnormal immune response in vitiligo. MHC class II is not expressed by melanocytes in psoriasis and is unlikely to be induced in vitiligo by cytokines released from activated non-melanocyte-specific T lymphocytes. This article was published in J Pathol and referenced in Biochemistry & Analytical Biochemistry

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