Expression of HLA-DR and T6 antigens on keratinocytes and dendritic cells. A comparative immunohistochemical study.
The number, morphology, and distribution of cells with dendritic processes in the epidermis and dermis, as well as the expression of HLA-DR and T6 antigen on keratinocytes in 66 skin biopsy specimens have been studied. In the epidermis, OKT6+ cells with slender dendritic processes predominated in the upper layers and outnumbered OKIa1+ cells with dendritic processes, which were only fragmentarily stained and present throughout all layers. In the dermis, OKIa1+ cells with dendritic processes outnumbered OKT6+ cells with dendritic processes. Cases showing keratinocytic positivity for OKIa1 contained very few epidermal OKIa1+ cells with dendritic processes; cases showing surface staining of keratinocytes with OKT6 contained high numbers of epidermal OKT6+ cells with dendritic processes. We suggest that OKT6 and OKIa1 label distinctive subpopulations of epidermal and dermal dendritic cells and, as such provide complementary data.
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Drijkoningen
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De Wolf-Peeters
J J
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van den Oord
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Degreef
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Desmet
D000911:Antibodies, Monoclonal / Q000276:immunology; D000945:Antigens, Differentiation, T-Lymphocyte; D000954:Antigens, Surface / Q000032:analysis*; D000078404:Epidermal Cells; D004817:Epidermis / Q000276:immunology*; D006684:HLA-DR Antigens; D000949:Histocompatibility Antigens Class II / Q000032:analysis*; D006801:Humans; D007124:Immunoenzyme Techniques; D007633:Keratins; D007801:Langerhans Cells / Q000276:immunology*; D012871:Skin Diseases / Q000276:immunology*
D000911:Antibodies, Monoclonal; D000945:Antigens, Differentiation, T-Lymphocyte; D000954:Antigens, Surface; D006684:HLA-DR Antigens; D000949:Histocompatibility Antigens Class II; D007633:Keratins