Glutaredoxin 1 mediates the protective effect of steady laminar flow on endothelial cells against oxidative stress-induced apoptosis via inhibiting Bim View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2017-11-14

AUTHORS

Yao Li, Meng Ren, Xiaoqun Wang, Xingxing Cui, Hongmei Zhao, Chuanrong Zhao, Jing Zhou, Yanan Guo, Yi Hu, Chen Yan, Bradford Berk, Jing Wang

ABSTRACT

Endothelial cell apoptosis induced by oxidative stress is an early event in the development of atherosclerosis. Several antioxidant enzymes which can cope with oxidative stress are up-regulated by the anti-atherogenic laminar blood flow often seen in straight or unbranched regions of blood vessels. However, the molecular mechanism responsible for flow-induced beneficial effects is incompletely understood. Here we report the role of glutaredoxin 1 (Grx1), an antioxidant enzyme, in flow-mediated protective effect in endothelial cells. Specifically, we found that Grx1 is markedly up-regulated by the steady laminar flow. Increasing Grx1 reduces the pro-apoptotic protein Bim expression through regulating Akt-FoxO1 signaling and also attenuates H2O2-induced Bim activation via inhibiting JNK phosphorylation, subsequently preventing the apoptosis of endothelial cells. Grx1 knockdown abolishes the inhibitory effect of steady laminar flow on Bim. The inhibitory effect of Grx1 on Bim is dependent on Grx1′s thioltransferase activity. These findings indicate that Grx1 induction plays a key role in mediating the protective effect of laminar blood flow and suggest that Grx1 may be a potential therapeutic target for atherosclerosis. More... »

PAGES

15539

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/s41598-017-15672-3

DOI

http://dx.doi.org/10.1038/s41598-017-15672-3

DIMENSIONS

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PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/29138498


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