Abstract | INTRODUCTION AND OBJECTIVE: METHOD: RESULTS: miR-146a expression and cell viability of H9C2 cells were downregulated under the circumstance of H/R injury. The tendency could be reversed by Dex, which could also upregulate SOD activity and decrease apoptosis, LDH activity, MDA, 78-kDa glucose-regulated protein ( GRP78), and C/EBP homologous protein (CHOP) levels of H9C2 cells. GRP78, CHOP levels, and cell viability were negatively modulated by miR-146a. Dex elevated cell viability, catalase, MnSOD, and NAD(P)H dehydrogenase (NQO1) levels but suppressed apoptosis rate, GRP78, and CHOP levels by increasing miR-146a expression and downregulating ROS, phosphorylation of p38, and extracellular signal-regulated kinases 1/2 levels. By using SB203580 (SB), the p38 mitogen-activated protein kinase (MAPK) inhibitor, Dex or the inhibition of miR-146 upregulated cell viability but downregulated GRP78 and CHOP levels. CONCLUSION: Dex might regulate miR-146a expression, which could further modulate the endoplasmic reticulum stress and oxidative stress and eventually affect the cell viability and apoptosis of myocardial cells injured by H/R via the MAPK signal pathway.
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Authors | Yi Chu, Jiwei Teng, Pin Feng, Hui Liu, Fangfang Wang, Haiyan Wang |
Journal | Pharmacology
(Pharmacology)
Vol. 107
Issue 1-2
Pg. 14-27
( 2022)
ISSN: 1423-0313 [Electronic] Switzerland |
PMID | 34718238
(Publication Type: Journal Article)
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Copyright | © 2021 S. Karger AG, Basel. |
Chemical References |
- Cardiotonic Agents
- MIRN146a microRNA, rat
- MicroRNAs
- Reactive Oxygen Species
- Dexmedetomidine
- Mapk1 protein, rat
- Mitogen-Activated Protein Kinase 1
- Mitogen-Activated Protein Kinase 3
- p38 Mitogen-Activated Protein Kinases
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Topics |
- Animals
- Apoptosis
(drug effects)
- Cardiotonic Agents
(pharmacology)
- Cell Hypoxia
- Cell Line
- Cell Survival
(drug effects)
- Dexmedetomidine
(pharmacology)
- Endoplasmic Reticulum Stress
(drug effects)
- MAP Kinase Signaling System
(drug effects)
- MicroRNAs
(antagonists & inhibitors, genetics, metabolism)
- Mitogen-Activated Protein Kinase 1
(genetics, metabolism)
- Mitogen-Activated Protein Kinase 3
(genetics, metabolism)
- Myocardial Reperfusion Injury
(drug therapy, metabolism)
- Oxidative Stress
(drug effects)
- Rats
- Reactive Oxygen Species
(metabolism)
- Up-Regulation
(drug effects)
- p38 Mitogen-Activated Protein Kinases
(antagonists & inhibitors, metabolism)
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