Abstract
The effect of the immunosuppressive agent cyclosporin A (Cy A) on the renal injury in acute serum sickness was examined in rabbits. Serum sickness was induced in 23 untreated NZW rabbits by a single intravenous injection of bovine serum albumin (BSA) 250 mg/kg with E. coli endotoxin (5 micrograms/kg): BSA was eliminated after 8.6 +/- 0.16 days (mean +/- s.e. (mean]; proteinuria occurred in 19 (84%) and glomerular proliferation in 20 (87%) rabbits. When Cy A (15 or 25 mg/kg) was given daily by intramuscular injection, starting either 2 days before or at the time of induction of acute serum sickness, proteinuria was profoundly reduced and glomerular proliferation was inhibited. Even when rabbits were first treated with Cy A (25 mg/kg) 5 days after the induction of disease proteinuria and glomerular proliferation were similarly inhibited. When the treated animals were compared with controls there were no differences in the following: time to elimination of BSA, amount or size of circulating immune complexes, fall in serum C3 at immune elimination, or deposition of immune reactants in the glomeruli. These results show that Cy A inhibits the renal injury of acute serum sickness and indicate that T cells may play a role in mediating the nephritis in this condition.
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Selected References
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