title: Ultrastructural documentation of HLA-DR antigen reactivity in normal human acrosyringial epithelium.
abstract: We have observed that monoclonal antibodies directed against human Ia-like antigens react with a subset of epidermal keratinocytes as well as Langerhans cells in normal human skin. Membrane reactivity for HLA-DR antigen in flattened ductal keratinocytes and in adjacent cuticular cells forming the acrosyringial lumen was observed using immunoelectron microscopy. It should be recognized that Ia-positive acrosyringial keratinocytes represent a potential source of contamination in methods designed to study and isolate Langerhans cells using antibodies directed against HLA-DR antigens. Teleologic considerations of HLA-DR antigen expression in the acrosyringium are discussed.
mesh_terms: D000328:Adult; D004817:Epidermis / Q000276:immunology / Q000648:ultrastructure*; D006684:HLA-DR Antigens; D000949:Histocompatibility Antigens Class II / Q000032:analysis*; D006801:Humans; D007124:Immunoenzyme Techniques; D008297:Male; D008854:Microscopy, Electron
chemical_list: D006684:HLA-DR Antigens; D000949:Histocompatibility Antigens Class II