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| Content Provider | Springer Nature : BioMed Central |
|---|---|
| Author | Zhu, Xi Wu, Yingbiao Zhang, Xiaogang Gu, Wei Ning, Zhongping |
| Abstract | Background Hypoxia/reoxygenation (H/R)-induced cardiomyocyte cell apoptosis is critical in developing myocardial infarction. Stachydrine (STA), an active constituent of Leonurus heterophyllus sweet, could have a protective effect on myocardial H/R injury, which remains unexplored. Therefore, the study aimed to investigate the protective effects and mechanisms of STA on H/R injury of cardiomyocytes. Methods Rat cardiomyocyte H9c2 cells underwent H/R (hypoxia for 4 h and reoxygenation for 12 h). Cells were pretreated with STA (50 µM) 2 h before H/R. Cardiomyocyte injury was evaluated by CCK-8 assay and lactate dehydrogenase (LDH) release. Apoptosis was assessed by TUNEL staining and caspase-3 activity. Oxidative stress was assessed by lipid oxidation product MDA and a ROS-scavenging enzyme SOD in culture media. Western blot was performed to measure the protein expressions of SIRT1, Nrf2, and heme oxygenase-1 (HO-1). Results STA reversed the decrease in cell viability and increased LDH release in H9c2 cells with the H/R insult. STA significantly suppressed oxidative stress, reduced MDA content, and increased SOD activity in H9c2 cells exposed to H/R. STA reduced apoptosis in H9c2 cells exposed to H/R, as evidenced by the reduced TUNEL positive cells and caspase-3 activity. In addition, STA enhanced SIRT1, Nrf2, and HO-1 protein expression in H/R-stimulated H9c2 cells. SIRT1 and Nrf2 involved the protective effect of STA in H/R-exposed H9c2 cells, as the changes in cell viability and caspase-3 activity by STA can be reversed by SIRT1 inhibitor EX-527 or Nrf2 siRNA. Conclusions Our data speculated that STA protects H/R injury and inhibits oxidative stress and apoptosis in cardiomyocytes by activation of the SIRT1-Nrf2 pathway. |
| Related Links | https://cardiothoracicsurgery.biomedcentral.com/counter/pdf/10.1186/s13019-023-02363-6.pdf |
| Ending Page | 8 |
| Page Count | 8 |
| Starting Page | 1 |
| File Format | HTM / HTML |
| ISSN | 17498090 |
| DOI | 10.1186/s13019-023-02363-6 |
| Journal | Journal of Cardiothoracic Surgery |
| Issue Number | 1 |
| Volume Number | 18 |
| Language | English |
| Publisher | BioMed Central |
| Publisher Date | 2023-09-26 |
| Access Restriction | Open |
| Subject Keyword | Cardiac Surgery Thoracic Surgery Hypoxia/reoxygenation (H/R) injury Stachydrine Cardiomyocyte SIRT1 Nrf2 |
| Content Type | Text |
| Resource Type | Article |
| Subject | Surgery Cardiology and Cardiovascular Medicine Pulmonary and Respiratory Medicine |
| Journal Impact Factor | 1.5/2023 |
| 5-Year Journal Impact Factor | 1.6/2023 |
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