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首页> 外文期刊>Journal of biochemical and molecular toxicology >17β-Estradiol regulates the expression of antioxidant enzymes in myocardial cells by increasing Nrf2 translocation
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17β-Estradiol regulates the expression of antioxidant enzymes in myocardial cells by increasing Nrf2 translocation

机译:17β-雌二醇通过增加Nrf2易位来调节心肌细胞中抗氧化酶的表达

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摘要

The transcription factor-E2-related factor 2 (Nrf2) is an important regulator against the process of oxidative stress. It can effectively scavenge oxygen-free radicals within cells to maintain homeostasis. In this study, we cultured primary myocardial cells, established the hypoxia/reoxygenation (H/R) model to simulate myocardial ischemia/reperfusion injury, and examined effects of 17β-estradiol (E2) on the quantitative changes of Nrf2 in cytosolic and nuclear extracts, the mRNA expression of heme oxygenase 1 (HO-1), superoxide dismutase (Cu/Zn-SOD), glutathione S transferase (GST), and glutamate cysteine ligase amide (GCL) of each model group by Western blot assays and reverse transcription polymerase chain reaction, to investigate the effects of E2 against H/R/injury in cultured myocardial cells. The present study shows that E2 can upregulate Nrf2 in nuclear extracts and increase the expression of HO-1, Cu/Zn-SOD, GST, and GCL significantly during H/R injury. Hence, our present findings suggest that E2 exhibits its antioxidant role by upregulating Nrf2 in nuclear extracts.
机译:转录因子-E2相关因子2(Nrf2)是抵抗氧化应激过程的重要调节剂。它可以有效清除细胞内的氧自由基以维持体内平衡。在这项研究中,我们培养了原代心肌细胞,建立了缺氧/复氧(H / R)模型来模拟心肌缺血/再灌注损伤,并研究了17β-雌二醇(E2)对胞浆和核提取物中Nrf2定量变化的影响。蛋白质印迹法和逆转录法检测各模型组血红素加氧酶1(HO-1),超氧化物歧化酶(Cu / Zn-SOD),谷胱甘肽S转移酶(GST)和谷氨酸半胱氨酸连接酶酰胺(GCL)的mRNA表达聚合酶链反应,以研究E2对培养的心肌细胞中H / R /损伤的影响。本研究表明,E2能在H / R损伤过程中显着上调核提取物中的Nrf2并显着增加HO-1,Cu / Zn-SOD,GST和GCL的表达。因此,我们目前的发现表明,E2通过上调核提取物中的Nrf2发挥抗氧化作用。

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