Abstract
Oxidative stress and apoptosis play key role in the pathogenesis of acute kidney injury (AKI). We hypothesize that Astragaloside IV(AS-IV) prevents AKI through inhibiting oxidative stress and apoptosis. The rats were divided into sham control, saline-,vehicle-, or AS-IV-treated groups. AS-IV (20 mg/kg) was orally administered once daily to the rats for 7 consecutive days before terminating the experiments. In ischemia-induced AKI model, experimental rats were subjected to bilateral clamping of the renal arteries for 45 min, followed by reperfusion for 24 h. In contrast-induced AKI model, iopamidol (2.9 g iodine/kg) was administered intravenously into the rats. Renal function, histopathology, oxidative stress and apoptosis were evaluated in these models. Pretreatment with AS-IV significantly decreased blood urea nitrogen, serum creatinine, cystatin C and neutrophil gelatinase-associated lipocalin levels, as well as urinary kidney injury molecule-1 level and tubular injury. AS-IV also reduced oxidative stress and tubular cell apoptosis. The p38 mitogen-activated protein kinase phosphorylation and caspase-3 activity were elevated in kidney tissues from AKI rats, accompanied by an increase in Bax expression and a decrease in Bcl-2 expression at mRNA and protein levels. These changes were prevented by AS-IV pretreatment. Therefore, AS-IV can be developed as a novel therapeutic approach to prevent AKI through targeting inhibition of oxidative stress and apoptosis pathways.
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This work was supported, in part, by grants from National Natural Science Foundation of China, No.81000305 (To Dingkun Gui) and No.30901888 (To Jianhua Huang).
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Dingkun Gui and Jianhua Huang contributed equally to this work.
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Gui, D., Huang, J., Liu, W. et al. Astragaloside IV prevents acute kidney injury in two rodent models by inhibiting oxidative stress and apoptosis pathways. Apoptosis 18, 409–422 (2013). https://doi.org/10.1007/s10495-013-0801-2
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DOI: https://doi.org/10.1007/s10495-013-0801-2