title: Cellular localization of class I (HLA-A, B, C) and class II (HLA-DR and DQ) MHC antigens on the epithelial cells of normal human jejunum.
abstract: HLA class I and class II (HLA-DR (human I-E equivalent) and DQ (human I-A equivalent] antigens were localized by immunofluorescence technique on thin frozen sections of normal human jejunum using a panel of monomorphic monoclonal antibodies. HLA class I (A, B and C) and HLA-DR molecules were found in the basolateral membrane of enterocytes; HLA-DR were also detected in a patchy distribution in the apical part of enterocytes; HLA-DQ molecules (the human equivalent of the murine I-A molecular subset) were not detected on normal enterocytes. All three molecules were detected on the membrane of lymphocytes and monocytes present in the lamina propria.
mesh_terms: D002462:Cell Membrane / Q000276:immunology / Q000648:ultrastructure; D004848:Epithelium / Q000276:immunology / Q000648:ultrastructure; D005455:Fluorescent Antibody Technique; D006680:HLA Antigens; D006684:HLA-DR Antigens; D000949:Histocompatibility Antigens Class II; D006801:Humans; D007413:Intestinal Mucosa / Q000276:immunology* / Q000648:ultrastructure; D007583:Jejunum / Q000276:immunology* / Q000648:ultrastructure
chemical_list: D006680:HLA Antigens; D006684:HLA-DR Antigens; D000949:Histocompatibility Antigens Class II