中国神经再生研究(英文版) ›› 2012, Vol. 7 ›› Issue (33): 2583-2591.

• 原著:周围神经损伤修复保护与再生 • 上一篇    下一篇

葛根素抑制高糖环境氧化应激导致的许旺细胞凋亡

  

  • 收稿日期:2012-08-11 修回日期:2012-10-16 出版日期:2012-11-25 发布日期:2012-11-25

Puerarin prevents high glucose-induced apoptosis of Schwann cells by inhibiting oxidative stress

Yingying Wu1, Bing Xue2, Xiaojin Li3, Hongchen Liu1   

  1. 1 Institute of Stomatology, Chinese PLA General Hospital, Beijing 100853, China
    2 Department of Endocrinology, General Hospital of Shenyang Military Region, Shenyang 110016, Liaoning Province, China
    3 Department of Endocrinology, Chinese PLA General Hospital, Beijing 100853, China
  • Received:2012-08-11 Revised:2012-10-16 Online:2012-11-25 Published:2012-11-25
  • Contact: Hongchen Liu, M.D.,Professor, Chief physician,Institute of Stomatology,Chinese PLA General Hospital, Beijing 100853,China hongchenliu2012@hotmail.com
  • About author:Yingying Wu★, Master,Attending physician, Institute of Stomatology, Chinese PLA General Hospital, Beijing 100853, China

Abstract:

Oxidative stress may be the unifying factor for the injury caused by hyperglycemia in diabetic peripheral neuropathy. Puerarin is the major isoflavonoid derived from Radix puerariae and has been shown to be effective in increasing superoxide dismutase activity. This study sought to investigate the neuroprotective effect of puerarin on high glucose-induced oxidative stress and Schwann cell apoptosis in vitro. Intracellular reactive oxygen radicals and mitochondrial transmembrane potential were detected by flow cytometry analysis. Apoptosis was confirmed by TUNEL and oxidative stress was monitored using an enzyme-linked immunosorbent assay for the DNA marker 8-hydroxy-2-deoxyguanosine. The expression levels of bax and bcl-2 were analyzed by quantitative real-time reverse transcriptase-PCR, while protein expression of cleaved caspase-3 and -9 were analyzed by means of western blotting. Results suggested that puerarin treatment inhibited high glucose-induced oxidative stress, mitochondrial depolarization and apoptosis in a dose-dependent manner. Furthermore, puerarin treatment downregulated Bax expression,upregulated bcl-2 expression and attenuated the activation of caspase-3 and -9. Overall, our results indicated that puerarin antagonized high glucose-induced oxidative stress and apoptosis in Schwann cells.

Key words: puerarin, diabetic peripheral neuropathy, hyperglycemia, Schwann cell, apoptosis, caspase;mitochondrial transmembrane potential, oxidative stress, 8-hydroxy-2-deoxyguanosine, reactive oxygen radical