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Heart Surg Forum. 2019 Jan 28;22(1):E019-E023. doi: 10.1532/hsf.2079.

MiR-29b Inhibits Ventricular Remodeling By Activating Notch Signaling Pathway in the Rat Myocardial Infarction Model.

Author information

1
Department of Child Healthcare, Linyi People's Hospital, NO. 233, Fenghuang Avenue, Jiuqu Community, Hedong District, Linyi City, 276000, Shandong Province, China.
2
Department of Cardiology, Jinan First People’s Hospital, NO. 132, Daming Lake Road, Lixia District, Jinan City, 250000, Shandong Province, China.
3
Department of Pneumology, Jinan Third People’s Hospital, NO. 1, North Street, North Industrial Road, Licheng District, Jinan City, 250101, Shandong Province, China.
4
Department of Cardiology, Jinan Central Hospital Affiliated to Shandong University, NO. 105, Jiefang Road, Lixia District, Jinan City, 250013, Shandong Province, China.

Abstract

BACKGROUND:

To study the effect of miR-29b on myocardial infarction via Notch signaling pathway in rats.

METHODS:

The rat acute myocardial infarction (AMI) models were established and were divided into AMI group, sham group and normal group (N = 10 in each group). HE (Hemotoxylin and eosin) staining was used to detect whether the model was constructed successfully. MiR-29b mimics, inhibitors, mimics negative control (NC) were transfected into H9c2 (2-1) cells. Then, cells were divided into a mimics group, inhibitor group, NC group, and blank group. The relative expression levels of miR-29b, Notch1, DII4 and Hesl were detected by qRT-PCR. The expression of NICD1 was detected by Western blotting.

RESULTS:

The rat AMI model was successfully constructed. Compared with normal and sham groups, the miR-29b expression was down-regulated, while the expression of Notch1, DII4 and Hesl was increased, and the NICD1 protein expression was increased in the myocardial infarction area of the AMI group (P < .05). Compared with the NC and blank groups, the relative expression of Notch1, DII4, Hesl and NICD1 were upregulated in the mimics group (P < .05), whereas the expression of Notch1, DII4, Hesl and NICD1 in the inhibitor group was decreased (P < .05).

CONCLUSION:

MiR-29b inhibited myocardial fibrosis and cardiac hypertrophy by activating the Notch signaling pathway and protected myocardium against myocardial infarction.

PMID:
30802192
DOI:
10.1532/hsf.2079
[Indexed for MEDLINE]

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