Abstract
In a telescoped model of antiglomerular basement membrane (GBM) antibody induced nephritis, Lewis strain rats were injected in the footpad with rabbit IgG on day 0 and then given a single intravenous injection of rabbit anti-rat GBM antibody on day 5. Proteinuria developed within 24 h and renal histology 7 days later showed a focal or diffuse proliferative glomerulonephritis. In this study rats treated as above were given Cyclosporin A (CyA) 20 mg/kg daily by intraperitoneal injection from day 0 or from day 5. Rats given CyA plus anti-GBM antibody developed extensive glomerular infiltration with polymorphs and glomerular thrombosis, lesions not seen with unmodified anti-GBM nephritis or in rats who received CyA alone. The mechanism by which CyA given prior to or at the onset of immunological insult in this model worsens glomerular injury is unclear.
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