title: Intraglomerular T cells and monocytes in nephritis: study with monoclonal antibodies.
abstract: Intraglomerular T cells, monocytes, total leucocytes and other mononuclear subsets were sought in renal biopsies from patients with glomerulonephritis, using monoclonal antibodies and immunoperoxidase techniques. Twenty-four biopsies with no significant glomerular proliferation on optical microscopy, thirty-two with only endocapillary hypercellularity, and twenty-one with extra capillary crescentic glomerular disease were studied. Few intra-glomerular leucocytes were seen in the non-proliferative group. In contrast, when compared with this group, biopsies with glomerular hypercellularity and particularly those with crescents showed increased numbers of intra-glomerular total leucocytes and monocytes/macrophages, as well as an excess of T lymphocytes and T cytotoxic/suppressor cells; T helper/inducer lymphocytes were significantly increased only in the crescentic group. Only small numbers of B lymphocytes and NK cells were found in all groups. The numbers of total glomerular T-cells and monocytes per glomerular cross section were highly correlated in the crescentic group. Only idiopathic IgA nephropathy failed to show a significant increase in the numbers of intra-glomerular leucocytes, in comparison with the non-proliferative group, Henoch-Schönlein purpura biopsies in contrast had an excess of both monocytes and T cell subsets. The finding of T lymphocytes as well as monocytes in glomeruli of proliferative nephritis suggests that cellular immune mechanisms may play a role in their pathogenesis, especially when crescents are present.
mesh_terms: D000911:Antibodies, Monoclonal; D000917:Antibody Formation; D001706:Biopsy; D006801:Humans; D007111:Immunity, Cellular; D007678:Kidney Glomerulus / Q000473:pathology*; D009000:Monocytes / Q000032:analysis*; D009393:Nephritis / Q000276:immunology / Q000473:pathology*; D013601:T-Lymphocytes / Q000032:analysis*
chemical_list: D000911:Antibodies, Monoclonal