scholarly journals PLCE1 promotes myocardial ischemia–reperfusion injury in H/R H9c2 cells and I/R rats by promoting inflammation

2019 ◽  
Vol 39 (7) ◽  
Author(s):  
WenHua Li ◽  
Yong Li ◽  
Ying Chu ◽  
WeiMin Wu ◽  
QiuHua Yu ◽  
...  
Keyword(s):  
Myocardial Ischemia ◽  
Ischemia Reperfusion Injury ◽  
Ischemia Reperfusion ◽  
Underlying Mechanism ◽  
H9c2 Cell ◽  
Injury Model ◽  
Tnf Α ◽  
Myocardial Ischemia Reperfusion Injury ◽  
Artery Disease ◽  
Myocardial Ischemia Reperfusion

Abstract Myocardial ischemia–reperfusion (I/R) injury is a major contributor to the morbidity and mortality associated with coronary artery disease. How to ensure the recovery of blood supply to ischemic myocardial tissue while avoiding or reducing I/R injury remains a critical problem in clinical practice. In the present study, we examined the function of phospholipase C ϵ-1 (PLCE1) by an H9c2 H/R (H/R, hypoxia–reoxygenation) model and a rat myocardial I/R injury model. The expression of PLCE1 and its effect on I/R injury-induced inflammatory response as well as its possible underlying mechanism were investigated. Our results have shown that PLCE1 was progressively increased along with the increase in hypoxia time in the H/R H9c2 and HL-1 cells. In myocardial I/R rats, PLCE1 presented a low expression level in the sham group, however, it was increased sharply in the I/R group. Overexpression of PLCE1 promoted the expression of IL-6, TNF-α, and IL-1α, and decreased the expression of IL-10. Knockdown of PLCE1 decreased the expression of IL-6, TNF-α, and IL-1α, and increased the expression of IL-10. Furthermore, overexpression of PLCE1 increased the phosphorylation of p38, ERK1/2, and nuclear factor-κ B (NF-κB) P65 while knockdown of PLCE1 inhibited their phosphorylation. In conclusion, the present study provided evidence that PLCE1 was up-regulated in H/R H9c2 cell and I/R rat. Overexpression of PLCE1 promoted the inflammatoion via activation of the NF-κB signaling pathway.

scholarly journals microRNA-30c promotes myocardial ischemia reperfusion injury by activating SIRT1 mediating NF-κB pathway

2019 ◽  
Author(s):  
Jianfeng Chen ◽  
Shufeng Xue ◽  
Mingming Zhang ◽  
Junlong Wu ◽  
Shouyan Zhang
Keyword(s):  
Myocardial Ischemia ◽  
Reperfusion Injury ◽  
Cell Apoptosis ◽  
Ischemia Reperfusion Injury ◽  
Ischemia Reperfusion ◽  
Myocardial Cell ◽  
Injury Model ◽  
Tnf Α ◽  
Myocardial Ischemia Reperfusion Injury ◽  
Myocardial Ischemia Reperfusion

Abstract Background This study aimed to investigate the effect of miR-30c on myocardial ischemia reperfusion (IR) injury and its underlying molecular mechanisms.Methods In our study, rat myocardial IR injury model was established and hemodynamic examination was performed. Moreover, the myocardial infarct size was detected by TTC staining. The pathologic change of myocardial tissues was measured by HE staining. The myocardial cell apoptosis was measured by TUNEL staining and flow cytometry. The expression of miR-30c and Sirtuin 1 (SIRT1) was detected by qRT-PCR. The levels of IL-1β, IL-6 and TNF-α were detected by ELISA. The expressions of Bax, Bcl-2, caspase-3, p-IκBα, IκBα, p-NF-κB p65, NF-κB p65 and SIRT1 were detected by western blot. The luciferase activity was measured by dual luciferase reporter gene assay. Interaction between miR-30c and SIRT1 were analyzed by RNA immunoprecipitation assay.Results Our results showed that rat myocardial IR injury model was successfully established and IR injury induced myocardial injury in rats. miR-30c increased the levels of IL-1β, IL-6 and TNF-α and myocardial cell apoptosis by activating NF-κB pathway. In addition, we also confirmed that SIRT1 was the target gene of miR-30c. SIRT1 could reverse the effect of miR-30c on the process of inflammation and apoptosis, as well as the activation of NF-κB pathway in myocardial cells.Conclusions Our study demonstrated that miR-30c could promote myocardial ischemia reperfusion injury through activating SIRT1 mediating NF-κB pathway.

scholarly journals Sappanone A Prevents Left Ventricular Dysfunction in a Rat Myocardial Ischemia Reperfusion Injury Model

2020 ◽  
Vol 21 (18) ◽  
pp. 6935
Author(s):  
Woori Jo ◽  
Byung Sun Min ◽  
Hee-Young Yang ◽  
Na-Hye Park ◽  
Kyung-Ku Kang ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Myocardial Ischemia ◽  
Reperfusion Injury ◽  
Ischemia Reperfusion Injury ◽  
Ischemia Reperfusion ◽  
Left Ventricular ◽  
Injury Model ◽  
Myocardial Ischemia Reperfusion Injury ◽  
Myocardial Ischemia Reperfusion ◽  
Systolic And Diastolic Function

The incidence of myocardial infarction, among the causes of cardiovascular morbidity and mortality, is increasing globally. In this study, left ventricular (LV) dysfunction, including LV systolic and diastolic function, was investigated in a rat myocardial ischemia/reperfusion injury model with echocardiography. The homoisoflavanone sappanone A is known for its anti-inflammatory effects. Using echocardiography, we found that sappanone A administration significantly improved LV systolic and diastolic function in a rat myocardial ischemia/reperfusion injury model, especially in the early phase development of myocardial infarction. Based on myocardial infarct size, serum cardiac marker assay, and histopathological evaluation, sappanone A showed higher efficacy at the doses used in our experiments than curcumin and was evaluated for its potential to improve LV function.

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