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Pan J, Zhang L, Li D, Li Y, Lu M, Hu Y, Sun B, Zhang Z, Li C. Hypoxia-inducible factor-1: Regulatory mechanisms and drug therapy in myocardial infarction. Eur J Pharmacol 2024; 963:176277. [PMID: 38123007 DOI: 10.1016/j.ejphar.2023.176277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2023] [Revised: 11/30/2023] [Accepted: 12/13/2023] [Indexed: 12/23/2023]
Abstract
Myocardial infarction (MI), an acute cardiovascular disease characterized by coronary artery blockage, inadequate blood supply, and subsequent ischemic necrosis of the myocardium, is one of the leading causes of death. The cellular, physiological, and pathological responses following MI are complex, involving multiple intertwined pathological mechanisms. Hypoxia-inducible factor-1 (HIF-1), a crucial regulator of hypoxia, plays a significant role in of the development of MI by modulating the behavior of various cells such as cardiomyocytes, endothelial cells, macrophages, and fibroblasts under hypoxic conditions. HIF-1 regulates various post-MI adaptive reactions to acute ischemia and hypoxia through various mechanisms. These mechanisms include angiogenesis, energy metabolism, oxidative stress, inflammatory response, and ventricular remodeling. With its crucial role in MI, HIF-1 is expected to significantly influence the treatment of MI. However, the drugs available for the treatment of MI targeting HIF-1 are currently limited, and most contain natural compounds. The development of precision-targeted drugs modulating HIF-1 has therapeutic potential for advancing MI treatment research and development. This study aimed to summarize the regulatory role of HIF-1 in the pathological responses of various cells following MI, the diverse mechanisms of action of HIF-1 in MI, and the potential drugs targeting HIF-1 for treating MI, thus providing the theoretical foundations for potential clinical therapeutic targets.
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Affiliation(s)
- Jinyuan Pan
- Innovation Research Institute of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, 250355, China
| | - Lei Zhang
- College of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, 250355, China
| | - Dongxiao Li
- Experimental Center, Shandong University of Traditional Chinese Medicine, Jinan, 250355, China
| | - Yuan Li
- Experimental Center, Shandong University of Traditional Chinese Medicine, Jinan, 250355, China
| | - Mengkai Lu
- Innovation Research Institute of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, 250355, China
| | - Yuanlong Hu
- College of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, 250355, China
| | - Bowen Sun
- Innovation Research Institute of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, 250355, China
| | - Zhiyuan Zhang
- Innovation Research Institute of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, 250355, China
| | - Chao Li
- Qingdao Traditional Chinese Medicine Hospital (Qingdao Hiser Hospital), Qingdao, 266000, China.
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Wang J, Du H, Sun Q, Wan W, Zhang H. The promotion of sestrin2/AMPK signaling by HIF-1α overexpression enhances the damage caused by acute myocardial infarction. BMC Cardiovasc Disord 2023; 23:571. [PMID: 37986153 PMCID: PMC10662688 DOI: 10.1186/s12872-023-03604-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 11/08/2023] [Indexed: 11/22/2023] Open
Abstract
OBJECTIVE Acute myocardial infarction (AMI), is a serious form of coronary heart disease. The present study sought to investigate the impact of HIF-1α on AMI, along with its fundamental mechanism. METHODS Sprague-Dawley (SD) rats were used to conduct an AMI model. 2,3,5-triphenyl-2H-tetrazolium chloride (TTC) staining was used examine the region of myocardial infract area at various time intervals. Protein expression levels were detected using western blotting. The rats were randomly divided into sham, model, negative control (NC), HIF-1α overexpression (HIF-1α-OE), and HIF-1α-OE+ si-sestrin2 groups. We examined the impact of HIF-1α overexpression on AMI rats using Haematoxylin-Eosin (H&E) staining, TTC staining, enzyme-linked immunosorbent assay (ELISA), TdT-mediated dUTP Nick-End Labeling (TUNEL) assay, and immunohistochemistry (IHC) staining. RESULTS According to the TTC findings, the region affected by myocardial infarction reached its peak at day 14. Based on the results from the western blot analysis, the levels of HIF-1α and sestrin2 were found the minimum on day 28. Subsequently, we discovered that the overexpression of HIF-1α rescued the cardiac function parameters, improved the morphology of myocardial tissue, and mitigated inflammation. Furthermore, the overexpression of HIF-1α led to a reduction in the levels of MDA and an increase in the levels of SOD. Moreover, the overexpression of HIF-1α resulted in a decrease in cellular apoptosis. This result was confirmed by the expression levels of Bcl-2 and Bax. Nevertheless, the defensive impact of elevated HIF-1α expression was somewhat counteracted by the suppression of sestrin2. In terms of mechanism, the overexpression of HIF-1α enhanced the levels of sestrin2 and the protein adenosine monophosphate activated kinase (AMPK). CONCLUSION Our research suggests that the overexpression of HIF-1α may rescue the damage to myocardial tissue, and this effect is associated with the sestrin2/AMPK signaling pathway. Our study provides a novel comprehension of the protective effects of HIF-1α overexpression on AMI.
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Affiliation(s)
- Jie Wang
- Cardiac Intensive Care Unit, Yantaishan Hospital, Yantai, Shandong, China
| | - Honglei Du
- Department of Cardiology, Yantai Yeda Hospital, No.23-1, the Yellow River Road, Yantai economic and Technological Development Zone, Yantai, Shandong, 264006, China
| | - Qing Sun
- Department of Cardiology, Yantaishan Hospital, Yantai, China
| | - Weiping Wan
- Department of Ultrasound, Yantaishan Hospital, Yantai, Shandong, China
| | - Haifeng Zhang
- Department of Cardiology, Yantai Yeda Hospital, No.23-1, the Yellow River Road, Yantai economic and Technological Development Zone, Yantai, Shandong, 264006, China.
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Corradi F, Masini G, Bucciarelli T, De Caterina R. Iron deficiency in myocardial ischaemia: molecular mechanisms and therapeutic perspectives. Cardiovasc Res 2023; 119:2405-2420. [PMID: 37722377 DOI: 10.1093/cvr/cvad146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 05/14/2023] [Accepted: 07/10/2023] [Indexed: 09/20/2023] Open
Abstract
Systemic iron deficiency (SID), even in the absence of anaemia, worsens the prognosis and increases mortality in heart failure (HF). Recent clinical-epidemiological studies, however, have shown that a myocardial iron deficiency (MID) is frequently present in cases of severe HF, even in the absence of SID and without anaemia. In addition, experimental studies have shown a poor correlation between the state of systemic and myocardial iron. MID in animal models leads to severe mitochondrial dysfunction, alterations of mitophagy, and mitochondrial biogenesis, with profound alterations in cardiac mechanics and the occurrence of a fatal cardiomyopathy, all effects prevented by intravenous administration of iron. This shifts the focus to the myocardial state of iron, in the absence of anaemia, as an important factor in prognostic worsening and mortality in HF. There is now epidemiological evidence that SID worsens prognosis and mortality also in patients with acute and chronic coronary heart disease and experimental evidence that MID aggravates acute myocardial ischaemia as well as post-ischaemic remodelling. Intravenous administration of ferric carboxymaltose (FCM) or ferric dextrane improves post-ischaemic adverse remodelling. We here review such evidence, propose that MID worsens ischaemia/reperfusion injury, and discuss possible molecular mechanisms, such as chronic hyperactivation of HIF1-α, exacerbation of cytosolic and mitochondrial calcium overload, amplified increase of mitochondrial [NADH]/[NAD+] ratio, and depletion of energy status and NAD+ content with inhibition of sirtuin 1-3 activity. Such evidence now portrays iron metabolism as a core factor not only in HF but also in myocardial ischaemia.
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Affiliation(s)
- Francesco Corradi
- Department of Medicine and Aging Sciences, "G. D'Annunzio" University of Chieti-Pescara, Via dei Vestini, 66100, Chieti, Italy
| | - Gabriele Masini
- Chair and Postgraduate School of Cardiology, University of Pisa, Via Savi 10, 56126, Pisa, Italy
| | - Tonino Bucciarelli
- Department of Medicine and Aging Sciences, "G. D'Annunzio" University of Chieti-Pescara, Via dei Vestini, 66100, Chieti, Italy
| | - Raffaele De Caterina
- Chair and Postgraduate School of Cardiology, University of Pisa, Via Savi 10, 56126, Pisa, Italy
- Fondazione VillaSerena per la Ricerca, Viale L. Petruzzi 42, 65013, Città Sant'Angelo, Pescara, Italy
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Piccoli M, Coviello S, Canali ME, Rota P, La Rocca P, Cirillo F, Lavota I, Tarantino A, Ciconte G, Pappone C, Ghiroldi A, Anastasia L. Neu3 Sialidase Activates the RISK Cardioprotective Signaling Pathway during Ischemia and Reperfusion Injury (IRI). Int J Mol Sci 2022; 23:ijms23116090. [PMID: 35682772 PMCID: PMC9181429 DOI: 10.3390/ijms23116090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 05/20/2022] [Accepted: 05/27/2022] [Indexed: 11/29/2022] Open
Abstract
Coronary reperfusion strategies are life-saving approaches to restore blood flow to cardiac tissue after acute myocardial infarction (AMI). However, the sudden restoration of normal blood flow leads to ischemia and reperfusion injury (IRI), which results in cardiomyoblast death, irreversible tissue degeneration, and heart failure. The molecular mechanism of IRI is not fully understood, and there are no effective cardioprotective strategies to prevent it. In this study, we show that activation of sialidase-3, a glycohydrolytic enzyme that cleaves sialic acid residues from glycoconjugates, is cardioprotective by triggering RISK pro-survival signaling pathways. We found that overexpression of Neu3 significantly increased cardiomyoblast resistance to IRI through activation of HIF-1α and Akt/Erk signaling pathways. This raises the possibility of using Sialidase-3 activation as a cardioprotective reperfusion strategy after myocardial infarction.
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Affiliation(s)
- Marco Piccoli
- Laboratory of Stem Cells for Tissue Engineering, IRCCS Policlinico San Donato, Piazza Malan 2, San Donato Milanese, 20097 Milan, Italy; (M.P.); (S.C.); (M.E.C.); (F.C.); (I.L.); (A.T.)
- Institute for Molecular and Translational Cardiology (IMTC), San Donato Milanese, 20097 Milan, Italy; (P.R.); (P.L.R.); (G.C.); (C.P.)
| | - Simona Coviello
- Laboratory of Stem Cells for Tissue Engineering, IRCCS Policlinico San Donato, Piazza Malan 2, San Donato Milanese, 20097 Milan, Italy; (M.P.); (S.C.); (M.E.C.); (F.C.); (I.L.); (A.T.)
- Institute for Molecular and Translational Cardiology (IMTC), San Donato Milanese, 20097 Milan, Italy; (P.R.); (P.L.R.); (G.C.); (C.P.)
| | - Maria Elena Canali
- Laboratory of Stem Cells for Tissue Engineering, IRCCS Policlinico San Donato, Piazza Malan 2, San Donato Milanese, 20097 Milan, Italy; (M.P.); (S.C.); (M.E.C.); (F.C.); (I.L.); (A.T.)
| | - Paola Rota
- Institute for Molecular and Translational Cardiology (IMTC), San Donato Milanese, 20097 Milan, Italy; (P.R.); (P.L.R.); (G.C.); (C.P.)
- Department of Biomedical, Surgical and Dental Sciences, University of Milan, Via Mangiagalli 31, 20097 Milan, Italy
| | - Paolo La Rocca
- Institute for Molecular and Translational Cardiology (IMTC), San Donato Milanese, 20097 Milan, Italy; (P.R.); (P.L.R.); (G.C.); (C.P.)
- Department of Biomedical Sciences for Health, University of Milan, Via Mangiagalli 31, 20097 Milan, Italy
| | - Federica Cirillo
- Laboratory of Stem Cells for Tissue Engineering, IRCCS Policlinico San Donato, Piazza Malan 2, San Donato Milanese, 20097 Milan, Italy; (M.P.); (S.C.); (M.E.C.); (F.C.); (I.L.); (A.T.)
- Institute for Molecular and Translational Cardiology (IMTC), San Donato Milanese, 20097 Milan, Italy; (P.R.); (P.L.R.); (G.C.); (C.P.)
| | - Ivana Lavota
- Laboratory of Stem Cells for Tissue Engineering, IRCCS Policlinico San Donato, Piazza Malan 2, San Donato Milanese, 20097 Milan, Italy; (M.P.); (S.C.); (M.E.C.); (F.C.); (I.L.); (A.T.)
- Institute for Molecular and Translational Cardiology (IMTC), San Donato Milanese, 20097 Milan, Italy; (P.R.); (P.L.R.); (G.C.); (C.P.)
| | - Adriana Tarantino
- Laboratory of Stem Cells for Tissue Engineering, IRCCS Policlinico San Donato, Piazza Malan 2, San Donato Milanese, 20097 Milan, Italy; (M.P.); (S.C.); (M.E.C.); (F.C.); (I.L.); (A.T.)
- Institute for Molecular and Translational Cardiology (IMTC), San Donato Milanese, 20097 Milan, Italy; (P.R.); (P.L.R.); (G.C.); (C.P.)
- Faculty of Medicine and Surgery, University Vita-Salute San Raffaele, Via Olgettina 58, 20097 Milan, Italy
| | - Giuseppe Ciconte
- Institute for Molecular and Translational Cardiology (IMTC), San Donato Milanese, 20097 Milan, Italy; (P.R.); (P.L.R.); (G.C.); (C.P.)
- Arrhythmology Department, IRCCS Policlinico San Donato, Piazza Malan 2, San Donato Milanese, 20097 Milan, Italy
| | - Carlo Pappone
- Institute for Molecular and Translational Cardiology (IMTC), San Donato Milanese, 20097 Milan, Italy; (P.R.); (P.L.R.); (G.C.); (C.P.)
- Faculty of Medicine and Surgery, University Vita-Salute San Raffaele, Via Olgettina 58, 20097 Milan, Italy
- Arrhythmology Department, IRCCS Policlinico San Donato, Piazza Malan 2, San Donato Milanese, 20097 Milan, Italy
| | - Andrea Ghiroldi
- Laboratory of Stem Cells for Tissue Engineering, IRCCS Policlinico San Donato, Piazza Malan 2, San Donato Milanese, 20097 Milan, Italy; (M.P.); (S.C.); (M.E.C.); (F.C.); (I.L.); (A.T.)
- Institute for Molecular and Translational Cardiology (IMTC), San Donato Milanese, 20097 Milan, Italy; (P.R.); (P.L.R.); (G.C.); (C.P.)
- Correspondence: (A.G.); (L.A.); Tel.: +39-02-2643-7746 (A.G.); +39-02-2643-7756 (L.A.)
| | - Luigi Anastasia
- Laboratory of Stem Cells for Tissue Engineering, IRCCS Policlinico San Donato, Piazza Malan 2, San Donato Milanese, 20097 Milan, Italy; (M.P.); (S.C.); (M.E.C.); (F.C.); (I.L.); (A.T.)
- Institute for Molecular and Translational Cardiology (IMTC), San Donato Milanese, 20097 Milan, Italy; (P.R.); (P.L.R.); (G.C.); (C.P.)
- Faculty of Medicine and Surgery, University Vita-Salute San Raffaele, Via Olgettina 58, 20097 Milan, Italy
- Correspondence: (A.G.); (L.A.); Tel.: +39-02-2643-7746 (A.G.); +39-02-2643-7756 (L.A.)
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Dabravolski SA, Sukhorukov VN, Kalmykov VA, Orekhov NA, Grechko AV, Orekhov AN. Heat Shock Protein 90 as Therapeutic Target for CVDs and Heart Ageing. Int J Mol Sci 2022; 23:ijms23020649. [PMID: 35054835 PMCID: PMC8775949 DOI: 10.3390/ijms23020649] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 01/04/2022] [Accepted: 01/06/2022] [Indexed: 12/13/2022] Open
Abstract
Cardiovascular diseases (CVDs) are the leading cause of death globally, representing approximately 32% of all deaths worldwide. Molecular chaperones are involved in heart protection against stresses and age-mediated accumulation of toxic misfolded proteins by regulation of the protein synthesis/degradation balance and refolding of misfolded proteins, thus supporting the high metabolic demand of the heart cells. Heat shock protein 90 (HSP90) is one of the main cardioprotective chaperones, represented by cytosolic HSP90a and HSP90b, mitochondrial TRAP1 and ER-localised Grp94 isoforms. Currently, the main way to study the functional role of HSPs is the application of HSP inhibitors, which could have a different way of action. In this review, we discussed the recently investigated role of HSP90 proteins in cardioprotection, atherosclerosis, CVDs development and the involvements of HSP90 clients in the activation of different molecular pathways and signalling mechanisms, related to heart ageing.
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Affiliation(s)
- Siarhei A. Dabravolski
- Department of Clinical Diagnostics, Vitebsk State Academy of Veterinary Medicine [UO VGAVM], 7/11 Dovatora Str., 210026 Vitebsk, Belarus
- Correspondence:
| | - Vasily N. Sukhorukov
- Laboratory of Cellular and Molecular Pathology of Cardiovascular System, AP Avtsyn Research Institute of Human Morphology, 3 Tsyurupy Str., 117418 Moscow, Russia; (V.N.S.); (V.A.K.)
- Laboratory of Medical Genetics, Russian Medical Research Center of Cardiology, Institute of Experimental Cardiology, 15-a 3-rd Cherepkovskaya Str., 121552 Moscow, Russia
| | - Vladislav A. Kalmykov
- Laboratory of Cellular and Molecular Pathology of Cardiovascular System, AP Avtsyn Research Institute of Human Morphology, 3 Tsyurupy Str., 117418 Moscow, Russia; (V.N.S.); (V.A.K.)
- Laboratory of Angiopathology, Institute of General Pathology and Pathophysiology, Russian Academy of Medical Sciences, 125315 Moscow, Russia
| | - Nikolay A. Orekhov
- Institute for Atherosclerosis Research, 4-1-207 Osennyaya Str., 121609 Moscow, Russia; (N.A.O.); (A.N.O.)
| | - Andrey V. Grechko
- Federal Research and Clinical Center of Intensive Care Medicine and Rehabilitology, 14-3 Solyanka Str., 109240 Moscow, Russia;
| | - Alexander N. Orekhov
- Institute for Atherosclerosis Research, 4-1-207 Osennyaya Str., 121609 Moscow, Russia; (N.A.O.); (A.N.O.)
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Chen X, Liang J, Bin W, Luo H, Yang X. Anti-hyperlipidemic, Anti-inflammatory, and Ameliorative Effects of DRP1 Inhibition in Rats with Experimentally Induced Myocardial Infarction. Cardiovasc Toxicol 2021; 21:1000-1011. [PMID: 34472022 DOI: 10.1007/s12012-021-09691-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Accepted: 08/17/2021] [Indexed: 10/20/2022]
Abstract
This study aims to investigate the biological role of DRP1 in myocardial infarction (MI) in concert with hyperlipidemia (HL). Based on the available literatures, 10 genes related to MI with HL (HL-MI) were screened and detected in clinical samples. High-fat diet (HFD) was used to establish HL rat models, after which the rats were subcutaneously injected with PBS or isoproterenol hydrochloride to induce acute MI. Then, rats with HL-MI were injected with pcDNA3.1, pcDNA3.1-DRP1, sh-NC, or sh-DRP1. Serum levels of total cholesterol (TC), triglycerides (TG), high-density lipoprotein-cholesterol (HDL-C), and low-density lipoprotein-cholesterol (LDL-C) were measured. Cardiac function was evaluated by detecting left ventricular fractional shortening (LVFS) and left ventricular ejection fraction (LVEF). Infarct size and histopathological changes were assessed as well as myocardial apoptosis and collagen deposition. The concentration of IL-6, IL-1β, and TNF-α in rat serum and cardiac tissues was also measured by ELISA. Mitochondrial function was shown by measuring the morphology, mitochondrial membrane potential (MMP), and intracellular reactive oxygen species (ROS) level. Pro-apoptotic proteins (Bax, caspase-1, and cleaved caspase-1) and NLRP3 inflammasome activation were also assessed. The expressions of the 10 genes were measured in clinical samples and DRP1 was selected for further experiments with significantly upregulated expression in MI patients. HFD-induced rats showed increased body weight, concurrent with higher levels of TG, TC, and LDL-C and lower HDL-C level. Compared with the BD-PBS group, the HFD-PBS group presented higher mRNA and protein expression levels of DRP1, exacerbated cardiac functions, enlarged infarct size, loss of cardiomyocytes, and disordered island cardiomyocytes. In the HL-MI rat model, injection of pcDNA3.1-DRP1 enhanced the levels of serum lipids and inflammation cytokines, induced loss of a number of cardiomyocytes and collagen deposition, and decreased LVFS and LVEF, while injection of sh-DRP1 ameliorated myocardial injuries, inflammation, and cardiomyocyte apoptosis and fibrosis. In coronary artery endothelial cells from the rats, loss of MMP was observed in the HFD-MI, LV-NC, LV-DRP1, and sh-NC groups and concomitantly, the sh-DRP1group showed increased MMP and decreased levels of mitochondrial ROS, cytochrome C, pro-apoptotic proteins, and NLRP3. Inhibition of DRP1 markedly suppressed HL, systematic inflammation, and myocardial injuries induced by HL-MI through partly restoring mitochondrial function and reducing NLRP3 expression.
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Affiliation(s)
- Xiehui Chen
- Shenzhen Longhua District Central Hospital (The Affiliated Central Hospital of Shenzhen Longhua District, Guangdong Medical University), Shenzhen, 518110, Guangdong, People's Republic of China.
| | - Jinjie Liang
- Department of Geriatrics Cardiovascular Medicine, Fuwai Hospital Chinese Academy of Medical Sciences, No. 12, Langshan Road, Nanshan District, Shenzhen, 518112, Guangdong, People's Republic of China
| | - Wugang Bin
- Department of Geriatrics Cardiovascular Medicine, Fuwai Hospital Chinese Academy of Medical Sciences, No. 12, Langshan Road, Nanshan District, Shenzhen, 518112, Guangdong, People's Republic of China
| | - Hongmin Luo
- Shenzhen RealOmics (Biotech) Co., Ltd., Shenzhen, 518081, Guangdong, People's Republic of China
| | - Xu Yang
- Shenzhen RealOmics (Biotech) Co., Ltd., Shenzhen, 518081, Guangdong, People's Republic of China
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Thu VT, Kim HK. Majonoside-R2 Postconditioning Protects Cardiomyocytes Against Hypoxia/Reoxygenation Injury by Attenuating the Expression of HIF1 α and Activating RISK Pathway. J Med Food 2021; 24:1222-1229. [PMID: 34714126 DOI: 10.1089/jmf.2021.k.0083] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Reoxygenation of hypoxic cardiac myocytes can paradoxically induce myocardial injury and affect the recovery processes. Pharmacological postconditioning is an efficient strategy used in clinical practice that protects cardiomyocytes from hypoxia/reoxygenation (HR) injury. Natural products or foods have been known to possess effective cardioprotective properties. Majonoside-R2 (MR2) is a dominant saponin component of Vietnamese ginseng that has several biological effects. In this study, we evaluated the protective effect of MR2 on HR-stimulated cardiomyocytes and investigated the related molecular mechanisms. H9C2 cardiomyocytes were exposed to HR conditions with or without MR2 supplementation. Samples from experimental groups were used to analyze the expression of apoptosis- and activating reperfusion injury salvage kinase (RISK)-related factors in response to HR injury by using enzyme-linked immunosorbent assay, real-time polymerase chain reaction, and Western blotting. Post-treatment, MR2 enhanced cell viability under HR conditions. We found that MR2 suppressed the expression of hypoxia-inducible factor 1-alpha (HIF1α) and transforming growth factor beta 1 (TGFβ1), modulated Akt/GSK3ß/cAMP response element-binding signaling, and regulated gene expression related to apoptosis (B cell lymphoma-extra-large [Bcl-xl], Bcl-2 homologous killer [Bak], Bcl-2 associated X [Bax], and connexin 43 [Cnx43]). Thus, the present findings demonstrate that MR2 protects cardiomyocytes against HR injury by suppressing the expression of HIF1α and activating the RISK pathway.
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Affiliation(s)
- Vu Thi Thu
- Center for Life Science Research, Faculty of Biology, and VNU University of Science, Vietnam National Univeristy, Hanoi, Vietnam.,The Key Laboratory of Enzyme and Protein Technology, VNU University of Science, Vietnam National Univeristy, Hanoi, Vietnam
| | - Hyoung Kyu Kim
- Cardiovascular and Metabolic Research Center and Inje University, Busan, Korea.,Smart Marine Therapeutic Center, Inje University, Busan, Korea
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Datta Chaudhuri R, Banik A, Mandal B, Sarkar S. Cardiac-specific overexpression of HIF-1α during acute myocardial infarction ameliorates cardiomyocyte apoptosis via differential regulation of hypoxia-inducible pro-apoptotic and anti-oxidative genes. Biochem Biophys Res Commun 2021; 537:100-108. [PMID: 33388412 DOI: 10.1016/j.bbrc.2020.12.084] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Accepted: 12/24/2020] [Indexed: 11/25/2022]
Abstract
HIF-1α acts as the cellular rheostat for oxygen sensing in cardiomyocytes. Overexpression of HIF-1α in the heart during acute myocardial infarction (MI) is known to attenuate cardiac dysfunction by upregulating pro-angiogenic HIF-1α target genes. However, the effect of HIF-1α overexpression on hypoxic cardiomyocyte apoptosis still remains obscure. In this study, we report for the first time that myocardium-targeted nanotized HIF-1α overexpression during MI downregulates cardiomyocyte apoptosis. HIF-1α overexpression attenuates bnip3-mediated apoptosis indirectly by promoting HO-1-induced anti-oxidant response. Chromatin immunoprecipitation experiment revealed that HIF-1α overexpression in hypoxic cardiomyocytes increases binding of HIF-1α to the hypoxia-responsive element in the promoter of its target anti-oxidant gene ho-1 which is known to attenuate ROS accumulation. ROS accumulation in hypoxic cardiomyocytes causes cysteine oxidation of the DNA-binding p50 subunit of NFκB, which hampers NFκB binding to κB-responsive genes like bnip3. Downregulated oxidative stress due to HIF-1α overexpression leads to decline in cysteine oxidation of NFκBp50, causing NFκB to bind to the promoter of bnip3 as a transcriptional repressor. Therefore HIF-1α overexpression-mediated attenuation of cardiomyocyte apoptosis occurs by transcriptional repression of bnip3 by NFκB. Our study thus reveals that downregulation of bnip3-mediated cardiomyocyte apoptosis occurs via ho-1 upregulation upon HIF-1α overexpression during MI, despite both being HIF-1α target genes. The cross-regulation of HIF-1α and NFκB-mediated pathways effectively downregulates apoptosis due to HIF-1α overexpression during MI, which can be exploited for possible therapeutic intervention.
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Affiliation(s)
- Ratul Datta Chaudhuri
- Department of Zoology, University of Calcutta, 35, Ballygunge Circular Road, Kolkata, 700019, India.
| | - Anirban Banik
- Department of Zoology, University of Calcutta, 35, Ballygunge Circular Road, Kolkata, 700019, India.
| | - Biswajit Mandal
- Department of Zoology, University of Calcutta, 35, Ballygunge Circular Road, Kolkata, 700019, India.
| | - Sagartirtha Sarkar
- Department of Zoology, University of Calcutta, 35, Ballygunge Circular Road, Kolkata, 700019, India.
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Zou H, Liu G. Inhibition of endoplasmic reticulum stress through activation of MAPK/ERK signaling pathway attenuates hypoxia-mediated cardiomyocyte damage. J Recept Signal Transduct Res 2020; 41:532-537. [PMID: 33023351 DOI: 10.1080/10799893.2020.1831534] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Huanxue Zou
- Department of Cardiology, Yuyao People’s Hospital, Yuyao, China
| | - Gang Liu
- Department of Cardiology, Yuyao People’s Hospital, Yuyao, China
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Xin T, Lv W, Liu D, Jing Y, Hu F. Opa1 Reduces Hypoxia-Induced Cardiomyocyte Death by Improving Mitochondrial Quality Control. Front Cell Dev Biol 2020; 8:853. [PMID: 32984338 PMCID: PMC7483501 DOI: 10.3389/fcell.2020.00853] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Accepted: 08/10/2020] [Indexed: 12/14/2022] Open
Abstract
Mitochondrial dysfunction contributes to cardiovascular disorders, especially post-infarction cardiac injury, through incompletely characterized mechanisms. Among the latter, increasing evidence points to alterations in mitochondrial quality control, a range of adaptive responses regulating mitochondrial morphology and function. Optic atrophy 1 (Opa1) is a mitochondrial inner membrane GTPase known to promote mitochondrial fusion. In this study, hypoxia-mediated cardiomyocyte damage was induced to mimic post-infarction cardiac injury in vitro. Loss- and gain-of-function assays were then performed to evaluate the impact of Opa1 expression on mitochondrial quality control and cardiomyocyte survival and function. Hypoxic stress reduced cardiomyocyte viability, impaired contractile/relaxation functions, and augmented the synthesis of pro-inflammatory mediators. These effects were exacerbated by Opa1 knockdown, and significantly attenuated by Opa1 overexpression. Mitochondrial quality control was disturbed by hypoxia, as reflected by multiple mitochondrial deficits; i.e., increased fission, defective fusion, impaired mitophagy, decreased biogenesis, increased oxidative stress, and blunted respiration. By contrast, overexpression of Opa1 normalized mitochondrial quality control and sustained cardiomyocyte function. We also found that ERK, AMPK, and YAP signaling can regulate Opa1 expression. These results identify Opa1 as a novel regulator of mitochondrial quality control and highlight a key role for Opa1 in protecting cardiomyocytes against post-infarction cardiac injury.
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Affiliation(s)
- Ting Xin
- Department of Cardiology, Tianjin First Center Hospital, Tianjin, China
| | - Wei Lv
- Department of Cardiology, Tianjin First Center Hospital, Tianjin, China
| | - Dongmei Liu
- Department of Cardiology, Tianjin First Center Hospital, Tianjin, China
| | - Yongle Jing
- Department of Cardiology, Tianjin First Center Hospital, Tianjin, China
| | - Fang Hu
- Department of Cardiology, Tianjin First Center Hospital, Tianjin, China
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