Home Bratislava Medical Journal 2017 Bratislava Medical Journal Vol.118, No.6, p.339-346, 2017

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Published Monthly, in English
Founded: 1919
ISSN 0006-9248
(E)ISSN 1336-0345

Impact factor 1.2

 

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Bratislava Medical Journal Vol.118, No.6, p.339-346, 2017

Title: MAPK pathway regulated the cardiomyocyte apoptosis in mice with post-infarction heart failure
Author: Q. Zhang, L. Lu, T. Liang, M. Liu, Z. L. Wang, P. Y. Zhang

Abstract:

BACKGROUND: To explore the role of the MAPK signaling pathway in the cardiomyocyte apoptosis of mice with post-infarction heart failure (HF).
METHODS: Mice were divided into sham and myocardial infarction (MI) groups. Before surgery, the MI group was divided into SB203580 and PBS subgroups. A post-infarction HF model was established by ligating the left anterior descending coronary artery. Ventricular dilatation and cardiac function were observed by small animal echocardiography. The growth of primary cardiomyocytes was observed under an inverted phase contrast microscope. The mRNA and protein expressions of endoplasmic reticulum stress (ERS) markers, GRP78 and CHOP, were detected by qRT-PCR and immunofluorescence assay, respectively.
RESULTS: The MI group had enlarged left ventricle and decreased cardiac function. GRP78 and CHOP protein expressions in myocardial tissues, especially those of SB203580 subgroup, significantly increased (p < 0.05).

The expressions of p-JNK and cleaved caspase 12 proteins, especially those of SB203580 subgroup, were significantly up-regulated. Cardiomyocytes of MI group were significantly more prone to apoptosis (p < 0.05), with SB203580 subgroup being more obvious.
CONCLUSION: MI was accompanied by ERS, probably involving the MAPK signaling pathway. SB203580, a specific inhibitor of this pathway, can relieve cardiomyocyte apoptosis and protect the myocardium by suppressing such stress (Tab. 3, Fig. 7, Ref. 20).



Keywords: myocardial infarction, heart failure, endoplasmic reticulum stress
Published online: 22-Jun-2017
Year: 2017, Volume: 118, Issue: 6 Page From: 339, Page To: 346
doi:10.4149/BLL_2017_065


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