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American Journal of Pathology, Vol 94, 271-284, Copyright © 1979 by American Society for Investigative Pathology

REGULAR ARTICLES

The presence and possible role of monocyte infiltration in human chronic proliferative glomerulonephritides. Light microscopic, immunofluorescence, and histochemical correlations

G Monga, G Mazzucco, GB di Belgiojoso and G Busnach

Twenty-seven cases of chronic glomerulonephritis with proliferative pattern (11 cases of primary mixed IgG-IgM cryoglobulinemia, 8 cases of SLE, and 8 cases of primary membranoproliferative glomerulonephritis) were studied with particular attention to the glomerular monocyte infiltration. The latter, detected by means of nonspecific esterase technique, was compared with the presence of hyaline thrombi and intraluminal immunoglobulin lumps. Monocyte infiltration was heavy and almost constant in cryoglobulinemia, less important in SLE, and practically absent in membranoproliferative glomerulonephritis. By means of immunofluorescence technique on paraffin embedded material, monocytes are shown to contain IgG and IgM, suggesting a phagocytic activity on some types of immune complexes. Since monocytes are migrant cells, and therefore easily removable from the glomeruli by the bloodstream, it seems that they could be responsible for regression of glomerular hypercellularity as reported in some patients with cryoglobulinemia showing clinical improvement.


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Copyright © 1979 by the American Society for Investigative Pathology.