Abstract
Pyelonephritis is the most common urinary tract infection in females, but the pathogenetic mechanisms are not well understood. Reactive oxygen species (ROS) have been implicated as cause of injury in several renal diseases. In this study, we have demonstrated the role of ROS in pathogenesis of pyelonephritis in Balb/c mice. A clear correlation between extent of ROS generation and subsequent lipid peroxidation and DNA damage in kidneys was observed during the course of infection, from 2 to 14 days. Activities of brush border membrane marker enzymes were also significantly altered. Administration of antioxidants, superoxide dismutase, catalase and dimethylsulfoxide significantly reversed the histopathological changes, reduced the extent of lipid peroxidation in renal brush border membrane, and also reversed the altered enzyme activities to near normal situation. These results clearly suggest that interaction of ROS with various cellular organelles in kidneys has a significant deleterious effect, and this could be the underlying mechanism for renal dysfunction in pyelonephritis.
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