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  • Title: Production of two novel monoclonal antibodies against human renal glomeruli and their application to the immunohistochemical investigation of crescentic glomerulonephritis.
    Author: Kohda Y, Takeya M, Arima S, Nakayama M, Sato T, Takahashi K.
    Journal: J Pathol; 1994 Jan; 172(1):45-52. PubMed ID: 7931826.
    Abstract:
    Two monoclonal antibodies (MAbs) against human renal glomeruli, HEP1 and HBM1, were produced using isolated human glomeruli as an antigen. Immunohistochemical and immunoelectron microscopic analyses revealed that the recognition site of HEP1 is the cell surface of the visceral glomerular epithelial cells. HEP1 showed no reaction in the renal interstitium or in other tissues. HBM1 recognized an antigen present in the basal lamina of the renal glomeruli, Bowman's capsule, and partly in the basement membrane of renal tubules, but it was not reactive with the mesangial matrix or renal interstitium. The isotype of both MAbs was IgG1, k. The molecular weights of their corresponding antigens were 127-177 and 220 kD, respectively. Besides human tissues, HEP1 also showed cross-reactions with antigens in the visceral glomerular epithelial cells of various animals other than mice. HBM1 recognized human antigen only. Using both MAbs, eight cases of crescentic glomerulonephritis were examined immunohistochemically. As a result, it was demonstrated that the crescents may not be formed by visceral glomerular epithelial cells. From this study, these two MAbs appear to be useful markers for the evaluation of renal glomerular disorders.
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