[Immunopathological study in membranoproliferative glomerulonephritis].

In 39 renal percutaneous biopsies, practiced to 31 patients with membranoproliferative glomerulonephritis (GMP) with subendothelial deposits (DSE), a study with immunofluorescence technique and light microscopy was carried out. In all cases, heavy granular deposits of C3 were detected in the loops of the glomerular capillaries and in a variable proportion of cases, deposits of IgM, IgA, C3PA (factor B) and C1q of similar aspect and localizacion were found. These findings suggest immunologic pathogenesis.