Abstract
The mechanisms by which intercurrent bacterial infections are associated with increased tissue injury in some forms of glomerulonephritis may include complement activation by bacteria and subsequent increased glomerular neutrophil (PMN) infiltration. We have studied the effect of complement activation after cobra venom factor (CVF) in anti-glomerular basement membrane (GBM) antibody-mediated disease. A single injection of CVF 24 h before the administration of heterologous nephrotoxic globulin (NTG) to Sprague-Dawley rats resulted in greatly increased albuminuria in some animals on the second day of this model. This phenomenon was reproducible and depended on the presence of circulating PMN and complement. We have previously shown that the administration of CVF on days 9 and 11 of the HgCl2 model in inbred Brown Norway rats, resulted in increased albuminuria in all animals at day 17 (p less than 0.05). The administration of small amounts of CVF with consequent complement activation in antibody-mediated disease represents a model for the increased injury seen after infection in human disease.
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