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Pigment Cell Melanoma Res ; 23(3): 375-84, 2010 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-20370855

RESUMO

Segmental vitiligo is often ascribed to the neurogenic theory of melanocyte destruction, although data about the initial etiopathological events are scarce. Clinical, histopathological and T-cell phenotypic analyses were performed during the early onset of a segmental vitiligo lesion in a patient with associated halo nevi. Histopathological analysis revealed a lymphocytic infiltrate, mainly composed of CD8+ T-cells and some CD4(+) T-cells around the dermo-epidermal junction. Flow cytometry analysis of resident T-cells revealed a clear enrichment of pro-inflammatory IFN-gamma producing CD8+ T-cells in lesional skin compared to the non-lesional skin. Using human leukocyte antigen-peptide tetramers (MART-1, tyrosinase, gp100), increased numbers of T cells, recognizing melanocyte antigens were found in segmental vitiligo lesional skin, as compared with the non-lesional skin and the blood. Our findings indicate that a CD8+ melanocyte specific T cell-mediated immune response, as observed in generalized vitiligo, also plays a role in segmental vitiligo with associated halo nevi.


Assuntos
Imunofenotipagem , Nevo com Halo/imunologia , Nevo com Halo/patologia , Vitiligo/imunologia , Vitiligo/patologia , Antígenos/imunologia , Biópsia , Linfócitos T CD8-Positivos/imunologia , Linfócitos T CD8-Positivos/patologia , Separação Celular , Humanos , Melanócitos/imunologia , Melanócitos/patologia , Nevo com Halo/sangue , Fenótipo , Pigmentação/imunologia , Pele/imunologia , Pele/patologia , Vitiligo/sangue
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