Resveratrol Upregulates Cardiac SDF-1 in Mice with Acute Myocardial Infarction through the Deacetylation of Cardiac p53.

Resveratrol Upregulates Cardiac SDF-1 in Mice with Acute Myocardial Infarction through the Deacetylation of Cardiac p53.
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DOI:
10.1371/journal.pone.0128978
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发表时间:
2015
期刊:
影响因子:
3.7
通讯作者:
Yue-Jin Y
Yue-Jin Y
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Hong W;Tatsuo S;Shou-Dong W;Qian Z;Jian-Feng H;Jue W;Chen J;Hai-Yan Q;Yue-Jin Y

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我们之前证明,白藜芦醇 (RSV) 给药会导致心脏基质细胞衍生因子 (SDF)-1 上调,并可以增强急性心肌梗死 (AMI) 小鼠干细胞的动员。然而,在 AMI 和 RSV 给药情况下参与 SDF-1 调节的上游信号转导仍不清楚。由于 RSV 是沉默调节蛋白 1 (SIRT1) 激活剂,而 SIRT 蛋白充当脱乙酰酶,因此我们研究了 SIRT1 在 SDF-1 上调中的作用及其后续影响。 在缺氧和血清剥夺条件下对 H9C2 心肌细胞进行的体外实验表明,p53 在 SDF-1 的上游发挥作用。 SIRT1沉默后RSV不能有效调节SDF-1,表明其依赖于SIRT1。随后,雄性 C57BL/6 小鼠被分为四组:1) 假手术组、2) MI、3) MI+RSV 组和 4) MI+RSV 加烟酰胺(SIRT 脱乙酰酶活性抑制剂)(MI+RSV+NAM)。与假手术小鼠相比,AMI 引起心脏 p53 水平轻微升高,并导致 SIRT1 显着下调和 p53 乙酰化或激活。与MI小鼠相比,MI+RSV给药改善了心脏SDF-1水平并逆转了SIRT1的减少和p53的激活。此外,我们观察到 MI+RSV 小鼠的心脏功能障碍较少,并确定 NAM 消除了 RSV 的作用。 RSV 部分通过 SIRT1 正常化/p53 失活途径增强 AMI 后心脏 SDF-1 的排泄。
We previously demonstrated that resveratrol (RSV) administration causes cardiac stromal cell-derived factor (SDF)-1 upregulation and can enhance the mobilization of stem cells in mice with acute myocardial infarction (AMI). However, the upstream signal transduction involved in SDF-1 regulation in the setting of AMI and RSV administration remains unclear. Because RSV is a sirtuin 1 (SIRT1) activator and SIRT proteins act as deacetylases, we investigated the role of SIRT1 in SDF-1 upregulation and its subsequent effects. In vitro experiments with H9C2 cardiomyocytes under hypoxia and serum-deprivation conditions showed that p53 acted upstream of SDF-1. RSV could not regulate SDF-1 effectively after SIRT1 silencing, indicating that it is dependent on SIRT1. Subsequently, male C57BL/6 mice were divided into four groups: 1) sham, 2) MI, 3) MI+RSV, and 4) MI+RSV plus nicotinamide, an inhibitor of the deacetylase activity of SIRT (MI+RSV+NAM). Compared with the sham mice, AMI caused a slight increase in the cardiac p53 level and resulted in significant SIRT1 downregulation and p53 acetylation or activation. Compared with the MI mice, MI+RSV administration improved the cardiac SDF-1 level and reversed the reduction of SIRT1 and the activation of p53. Furthermore, we observed less cardiac dysfunction in MI+RSV mice and determined that NAM abolished the effects of RSV. RSV enhances cardiac SDF-1 excretion after AMI partially through a SIRT1 normalization/p53 inactivation pathway.
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