miR-582-5p Regulating Notch1 to Reduce Myocardial Ischemia-reperfusion Injury
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摘要:
目的 检测小鼠心肌缺血再灌注和HL-1细胞HR模型后miR-582-5p和Notch1在其中的表达变化,以此探讨miR-582-5p调控Notch1保护心肌的作用。 方法 通过建立小鼠心肌缺血再灌注模型和HL-1细胞氧糖剥夺再复氧模型,使用qPCR检测miR-582-5p和Notch1在小鼠IR和细胞HR后的表达量,继而使用TargetScan网站预测miR-582-5p和Notch1的靶向结合位点,在细胞中转染miR-582-5p和Notch1的Inhibitor和Mimics,再次检测miR-582-5p和Notch1的表达变化,最后使用CCK-8实验检测HL-1细胞转染Inhibitor和Mimics后的细胞活力。 结果 在小鼠IR和HL-1细胞HR后,miR-582-5p表达明显升高(P < 0.01),Notch1表达显著下降(P < 0.001),而在转染Inhibitor后,miR-582-5p明显下调(P < 0.001),同时Notch1显著上调(P = 0.017),并且心肌细胞活力得到显著提高(P = 0.006),而在转染Mimics后结果完全相反。 结论 miR-582-5p可以通过调控Notch1从而保护心肌以此来对抗心肌缺血缺氧。 -
关键词:
- 心肌缺血再灌注 /
- 氧糖剥夺 /
- miR-582-5p /
- Notch1
Abstract:Objective To investigate the role of miR-582-5p in regulating Notch1 to protect myocardium, by detecting the expression changes of miR-582-5p and Notch1 after myocardial ischemia reperfusion and HR model of HL-1 cells in mice. Methods The mouse myocardial ischemia-reperfusion model and HL-1 cell OGD reoxygenation model were established. The expression of miR-582-5p and Notch1 in mouse IR and cell HR was detected by qPCR, and then the targeted binding sites of miR-582-5p and Notch1 were predicted by TargetScan. Inhibitor and mimics of miR-582-5p and Notch1 were transfected into cells, and the expression of miR-582-5p and Notch1 was detected again. Finally, CCK-8 assay was used to detect the cell viability of HL-1 cells transfected with inhibitor and mimics. Results After HR, the expression of miR-582-5p was significantly increased (P < 0.01) and the expression of Notch1 was significantly decreased in IR mouse and HL-1 cells (P < 0.001). After transfection of inhibitor, the expression of miR-582-5p was significantly down-regulated (P < 0.001), while Notch1 was significantly up-regulated (P = 0.017), and the viability of cardiomyocytes was significantly increased (P = 0.006), but the result was opposite after transfection of mimics. Conclusion miR-582-5p can protect myocardium against myocardial ischemia and hypoxia by regulating Notch1. -
Key words:
- Myocardial ischemia-reperfusion /
- Oxygen and glucose deprivation /
- miR-582-5p /
- Notch1
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图 1 miR-582-5p和Notch1在心肌缺血再灌注小鼠心脏组织和HL-1细胞OGD模型中的表达
A:miR-582-5p在MRI小鼠心脏组织中的相对表达量(n = 5); B:miR-582-5p在OGD模型HL-1细胞中的相对表达量(n = 3);C:Notch1在MRI小鼠心脏组织中的相对表达量(n = 5);D:Notch1在OGD模型HL-1细胞中的相对表达量(n = 3)。**P < 0.01,***P < 0.001。
Figure 1. Expression of miR-582-5p and Notch 1 in cardiac tissue and HL-1 cell OGD model of myocardial ischemia-reperfusion mice
图 2 miR-582-5p可靶向Notch1并调控其表达
A:miR-582-5p与Notch1结合位点预测;B:miR-582-5p转染inhibitor和mimics后的相对表达量(n = 3);C:Notch1转染inhibitor和mimics后的相对表达量(n = 3);D:WB检测转染inhibitor后Notch1的表达及定量图(n = 3)。E:WB检测转染mimics后Notch1的表达及定量图(n = 3)。*P < 0.05,**P < 0.01,***P < 0.001。
Figure 2. miR-582-5p targets Notch 1 and regulates its expression
表 1 引物序列
Table 1. Primer sequence
基因名称 上游引物序列(5′- 3′) 下游引物序列(5′- 3′) GAPDH CTCGCCTTTGCCGATCC GAATCCTTCTAGCCCATGCC Notch1 GATGGCCtCAATGGGTACAAG TCGTTGTTGTTGATGTCACAGT miR-582-5p 通用引物 ATACAGTTGTTCAACCAGTTAC U6 通用引物 ATGGACTATCATATGCTTACCGTA -
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