SIRT3
SOD2
锡尔图因
线粒体
氧化应激
乙酰化
SIRT2
白藜芦醇
细胞生物学
化学
药理学
氧化磷酸化
线粒体ROS
细胞凋亡
西妥因1
生物
生物化学
超氧化物歧化酶
下调和上调
基因
作者
Zhenhua Zeng,Ya-Ting Yang,Xingui Dai,Siqi Xu,Tao Li,Qin Zhang,Ke‐seng Zhao,Zhongqing Chen
标识
DOI:10.1080/14728222.2016.1177023
摘要
Background: Previously, we demonstrated that sirtuin (SIRT)1 plays vital roles in the small intestine (SI), protecting against severe hemorrhagic shock (HS), and that polydatin (PD) can attenuate SI injury via SIRT1 activation.Objective: To explore the role of SIRT3 and mitochondria in SI injury after HS, and explore SIRT3 as a therapeutic target of PD in HS.Methods: An H2O2-induced model of oxidative stress and an HS model were created in IEC-6 cells and Sprague–Dawley rats, respectively. Protein content and activity of SIRT1/3 and SOD2, acetylated-SOD2 level, and mitochondrial morphology/function were determined.Results: Expression and activity of SIRT1/3 were reduced in SI tissue and IEC-6 cells after HS or oxidative stress, accompanied by an increased acetylated-SOD2 level and damaged mitochondria. Treatment with PD or resveratrol restored SIRT1/3 activity considerably, restored SIRT1/3 expression slightly, and reduced acetylated-SOD2 levels, which lead to elevated SOD2 activity and ameliorated mitochondrial function. The addition of 3-TYP (SIRT3 inhibitor) partially blocked the mitochondrial-protective effects of PD, but did not affect increased SIRT1 activity.Conclusions: The SIRT3–SOD2 signaling pathway is involved in mitochondrial dysfunction induced by HS. PD attenuates mitochondrial dysfunction via activation of the SIRT3–SOD2 pathway, and may be a new approach for HS treatment.
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