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  • Title: First histopathological and immunophenotypic analysis of early dynamic events in a patient with segmental vitiligo associated with halo nevi.
    Author: van Geel NA, Mollet IG, De Schepper S, Tjin EP, Vermaelen K, Clark RA, Kupper TS, Luiten RM, Lambert J.
    Journal: Pigment Cell Melanoma Res; 2010 Jun; 23(3):375-84. PubMed ID: 20370855.
    Abstract:
    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.
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