MitoTEMPO Prevents Oxalate Induced Injury in NRK-52E Cells via Inhibiting Mitochondrial Dysfunction and Modulating Oxidative Stress

作者：Zhang, Jiaqiao; Wang, Qing; Xu, Chuou; Lu, Yuchao; Hu, Henglong; Qin, Baolong; Wang, Yufeng; He, Deng; Li, Cong; Yu, Xiao; Wang, Shaogang^*; Liu, Jihong

来源：Oxidative Medicine and Cellular Longevity, 2017, 2017: 7528090.

DOI：10.1155/2017/7528090

• NADPH OXIDASE
• EPITHELIAL-CELLS
• CRYSTAL DEPOSITION
• EXPRESSION
• KIDNEY
• OSTEOPONTIN
• NEPHROLITHIASIS
• HYPEROXALURIA
• SUPEROXIDE
• ACTIVATION

As one of the major risks for urolithiasis, hyperoxaluria can be caused by genetic defect or dietary intake. And high oxalate induced renal epithelial cells injury is related to oxidative stress and mitochondrial dysfunction. Here, we investigated whether MitoTEMPO, a mitochondria-targeted antioxidant, could protect against oxalate mediated injury in NRK-52E cells via inhibiting mitochondrial dysfunction and modulating oxidative stress. MitoSOX Red was used to determine mitochondrial ROS (mtROS) production. Mitochondrial membrane potential (Delta psi m) and quantification of ATP synthesis weremeasured to evaluate mitochondrial function. The protein expression of Nox4, Nox2, and p22 was also detected to explore the effect of oxalate and MitoTEMPO on NADPH oxidase. Our results revealed that pretreatment with MitoTEMPO significantly inhibited oxalate induced lactate dehydrogenase (LDH) and malondialdehyde(MDA) release and decreased oxalate induced mtROS generation. Further, Mito TEMPO pretreatment restored disruption of Delta psi m and decreased ATP synthesis mediated by oxalate. In addition, MitoTEMPO altered the protein expression ofNox4 and p22 and decreased the protein expression of IL-6 and osteopontin (OPN) induced by oxalate. We concluded that MitoTEMPO may be a new candidate to protect against oxalate induced kidney injury as well as urolithiasis.

• 出版日期2017
• 单位华中科技大学