Abstract
Neuropathy, retinopathy, and nephropathy, known as the triopathy of diabetes, are the consequences of microvascular complications of diabetes. The present study aimed to investigate the potential protective effects of oleanolic acid (OA) administration against diabetic nephropathy considering biochemical and histopathological parameters. The rats with fasting blood glucose levels of 200 mg/dl and above were considered diabetic after induction of diabetes via injecting STZ. The other half of the rats were not injected with STZ (healthy rats). Both healthy and diabetic rats were then divided randomly into two subgroups to be administered with either OA (5 mg/kg) with 1 ml tap water by oral gavage or 1 ml tap water in the same route for 21 days. Serum urea-N, Ca, P, and Mg as well as renal tissue MDA, SOD, NF-κB, IL-6, IL-18, AMPK, YKL-40, and KIM-1 levels were measured. OA administration partially decreased levels of serum urea-N and P, as well as levels of renal tissue MDA and inflammation markers (NF-κB, IL-6, IL-18, YKL-40, and KIM-1) in the diabetic rats. It also partially increased serum Ca and renal tissue AMPK levels in diabetic rats. These positive effects were also seen in renal tissue histopathology. OA treatment partially alleviated renal damage inflammatory and oxidative profiles in diabetic rats.
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