論文

査読有り
2015年4月

Epalrestat increases glutathione, thioredoxin, and heme oxygenase-1 by stimulating Nrf2 pathway in endothelial cells

REDOX BIOLOGY
  • Kaori Yama
  • ,
  • Keisuke Sato
  • ,
  • Natsuki Abe
  • ,
  • Yu Murao
  • ,
  • Ryosuke Tatsunami
  • ,
  • Yoshiko Tampo

4
開始ページ
87
終了ページ
96
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1016/j.redox.2014.12.002
出版者・発行元
ELSEVIER SCIENCE BV

Epalrestat ([PS) is the only aldose reductase inhibitor that is currently available for the treatment of diabetic neuropathy. Recently, we found that [PS at near-plasma concentration increases the intracellular levels of glutathione (GSH) in rat Schwann cells. GSH plays a crucial role in protecting endothelial cells from oxidative stress, thereby preventing vascular diseases. Here we show that [PS increases GSH levels in not only Schwann cells but also endothelial cells. Treatment of bovine aortic endothelial cells (BAECs), an in vitro model of the vascular endothelium, with EPS caused a dramatic increase in intracellular GSH levels. This was concomitant with the up-regulation of glutamate cysteine ligase, an enzyme catalyzing the first and rate-limiting step in tie novo GSH synthesis. Moreover, EPS stimulated the expression of thiorecloxin and heme oxygenase-1, which have important redox regulatory functions in endothelial cells. Nuclear factor erythroid 2-related factor 2 (Nr12) is a key transcription factor that regulates the expression of antioxidant genes. [PS increased nuclear Nr12 levels in BAECs. NrI2 knockdown by siRNA suppressed the [PS-induced glutamate cysteine ligase, thiorecloxin-1, and he me oxygenase-1 expression. Interestingly, LY294002, an inhibitor of phosphatidylinositol 3-kinase, abolished the [PS-stimulated GSH synthesis, suggesting that the kinase is associated with Nr12 activation induced by EPS. Furthermore, [PS reduced the cytotoxicity induced by H202 and tert-butylhydroperoxide, indicating that [PS plays a role in protecting cells from oxidative stress. Taken together, the results provide evidence that [PS exerts new beneficial effects on endothelial cells by increasing GSH, thioredoxin, and heme oxygenase-1 levels through the activation of Nr12. We suggest that EPS has the potential to prevent several vascular diseases caused by oxidative stress. c 2014 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (Iii p:// (TIT ativecommons.orgilicenses by-nc-nd/3.(1

Web of Science ® 被引用回数 : 13

リンク情報
DOI
https://doi.org/10.1016/j.redox.2014.12.002
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/25529839
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000350813800010&DestApp=WOS_CPL

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