Hydrogen Sulfide Attenuates Angiotensin II-Induced Cardiac Fibroblast Proliferation and Transverse Aortic Constriction-Induced Myocardial Fibrosis through Oxidative Stress Inhibition via Sirtuin 3
| Autor: | Yun Chen, Yuqin Wang, Guoliang Meng, Jieru Shen, Shuping Zhang, Lulu Liu, Weiwei Gong |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Dynamins
Aging medicine.medical_specialty Article Subject SIRT3 Transcription Genetic medicine.disease_cause Biochemistry Rats Sprague-Dawley Hydroxyproline chemistry.chemical_compound Mice In vivo Internal medicine Sirtuin 3 medicine Animals Hydrogen Sulfide RNA Small Interfering Sirius Red Cell Proliferation Heart Failure Membrane Potential Mitochondrial Mice Knockout QH573-671 biology Angiotensin II Myocardium Cell Biology General Medicine Fibroblasts Actins Rats Oxidative Stress Endocrinology chemistry Sirtuin biology.protein Myocardial fibrosis RNA Interference Collagen Cytology Oxidative stress Research Article |
| Zdroj: | Oxidative Medicine and Cellular Longevity Oxidative Medicine and Cellular Longevity, Vol 2021 (2021) |
| ISSN: | 1942-0994 1942-0900 |
| Popis: | Sirtuin 3 (SIRT3) is critical in mitochondrial function and oxidative stress. Our present study investigates whether hydrogen sulfide (H2S) attenuated myocardial fibrosis and explores the possible role of SIRT3 on the protective effects. Neonatal rat cardiac fibroblasts were pretreated with NaHS followed by angiotensin II (Ang II) stimulation. SIRT3 was knocked down with siRNA technology. SIRT3 promoter activity and expression, as well as mitochondrial function, were measured. Male wild-type (WT) and SIRT3 knockout (KO) mice were intraperitoneally injected with NaHS followed by transverse aortic constriction (TAC). Myocardium sections were stained with Sirius red. Hydroxyproline content, collagen I and collagen III, α-smooth muscle actin (α-SMA), and dynamin-related protein 1 (DRP1) expression were measured both in vitro and in vivo. We found that NaHS enhanced SIRT3 promoter activity and increased SIRT3 mRNA expression. NaHS inhibited cell proliferation and hydroxyproline secretion, decreased collagen I, collagen III, α-SMA, and DRP1 expression, alleviated oxidative stress, and improved mitochondrial respiration function and membrane potential in Ang II-stimulated cardiac fibroblasts, which were unavailable after SIRT3 was silenced. In vivo, NaHS reduced hydroxyproline content, ameliorated perivascular and interstitial collagen deposition, and inhibited collagen I, collagen III, and DRP1 expression in the myocardium of WT mice but not SIRT3 KO mice with TAC. Altogether, NaHS attenuated myocardial fibrosis through oxidative stress inhibition via a SIRT3-dependent manner. |
| Databáze: | OpenAIRE |
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