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Syeda MZ, Fasae MB, Yue E, Ishimwe AP, Jiang Y, Du Z, Yang B, Bai Y. Anthocyanidin attenuates myocardial ischemia induced injury via inhibition of ROS‐JNK‐Bcl‐2 pathway: New mechanism of anthocyanidin action. Phytother Res 2019; 33:3129-3139. [DOI: 10.1002/ptr.6485] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Revised: 07/26/2019] [Accepted: 07/31/2019] [Indexed: 12/15/2022]
Affiliation(s)
- Madiha Zahra Syeda
- Department of Pharmacology (State‐Province Key Laboratories of Biomedicine‐Pharmaceutics of China, Key Laboratory of Cardiovascular Research, Ministry of Education), College of PharmacyHarbin Medical University Harbin P. R. China
| | - Moyondafoluwa Blessing Fasae
- Department of Pharmacology (State‐Province Key Laboratories of Biomedicine‐Pharmaceutics of China, Key Laboratory of Cardiovascular Research, Ministry of Education), College of PharmacyHarbin Medical University Harbin P. R. China
| | - Er Yue
- Department of Pharmacology (State‐Province Key Laboratories of Biomedicine‐Pharmaceutics of China, Key Laboratory of Cardiovascular Research, Ministry of Education), College of PharmacyHarbin Medical University Harbin P. R. China
| | - Alain Prudence Ishimwe
- Department of Pharmacology (State‐Province Key Laboratories of Biomedicine‐Pharmaceutics of China, Key Laboratory of Cardiovascular Research, Ministry of Education), College of PharmacyHarbin Medical University Harbin P. R. China
| | - Yannan Jiang
- Department of Pharmacology (State‐Province Key Laboratories of Biomedicine‐Pharmaceutics of China, Key Laboratory of Cardiovascular Research, Ministry of Education), College of PharmacyHarbin Medical University Harbin P. R. China
- Translational Medicine Research and Cooperation Center of Northern ChinaHeilongjiang Academy of Medical Sciences Harbin P. R. China
| | - Zhimin Du
- Institute of Clinical Pharmacologythe Second Affiliated Hospital, Harbin Medical University (Key Laboratory of Drug Development, Universities of Heilongjiang Province) Harbin P. R. China
| | - Baofeng Yang
- Department of Pharmacology (State‐Province Key Laboratories of Biomedicine‐Pharmaceutics of China, Key Laboratory of Cardiovascular Research, Ministry of Education), College of PharmacyHarbin Medical University Harbin P. R. China
- Translational Medicine Research and Cooperation Center of Northern ChinaHeilongjiang Academy of Medical Sciences Harbin P. R. China
| | - Yunlong Bai
- Department of Pharmacology (State‐Province Key Laboratories of Biomedicine‐Pharmaceutics of China, Key Laboratory of Cardiovascular Research, Ministry of Education), College of PharmacyHarbin Medical University Harbin P. R. China
- Translational Medicine Research and Cooperation Center of Northern ChinaHeilongjiang Academy of Medical Sciences Harbin P. R. China
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Xu X, Liu X, Yu L, Ma J, Yu S, Ni M. Impact of intracoronary nicorandil before stent deployment in patients with acute coronary syndrome undergoing percutaneous coronary intervention. Exp Ther Med 2019; 19:137-146. [PMID: 31853283 PMCID: PMC6909796 DOI: 10.3892/etm.2019.8219] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Accepted: 11/07/2019] [Indexed: 12/29/2022] Open
Abstract
The present study aimed to clarify the effect of bolus intracoronary nicorandil on inflammatory, oxidative and adherent indicators in patients with acute coronary syndrome (ACS) undergoing percutaneous coronary intervention (PCI). This randomized controlled trial (RCT) was performed to detect the inflammation and oxidative stress in intracoronary blood both before and after PCI. In total, 65 consecutive patients undergoing PCI were classified into a nicorandil therapy group (n=32) or a placebo group (n=33). All procedures were performed at Shandong University Qilu Hospital, China, during the period from March, 2016 to May, 2017. Intracoronary blood from patients who received nicorandil therapy during PCI showed no change in soluble CD40 ligand (sCD40L) concentration (1.86±0.08 vs. 1.90±0.09 ng/ml, P=0.12) but a significant increase was noted in the control group (1.87±0.17 vs. 2.82±0.26 ng/ml, P<0.01). This indicated a relative reduction in sCD40L level after PCI in the nicorandil group. We further demonstrated an increase in superoxide dismutase (SOD) activity (29.37±0.81 vs. 31.03±0.60 U/ml, P<0.001) and a reduction in lipid peroxidation (3.84±0.99 vs. 4.23±0.13 U/ml, P=0.001) in the nicorandil group but observed no change in the placebo group. ICAM-1 levels showed no change in the nicorandil group (69.54±6.89 vs. 72.01±8.25 ng/ml, P=0.83) but a significant increase in the control group after PCI in intracoronary blood (56.57±4.96 vs. 76.81±6.88 ng/ml, P=0.002). No changes were found in hs-CRP, TNFα and sVCAM-1 levels in coronary blood for both groups before and after PCI in ACS patients. Our findings demonstrate that intracoronary bolus nicorandil therapy has a significant effect on the inhibition of inflammatory indicators and oxidative stress in patients with ACS during PCI. This suggests a possible medical application of nicorandil for reducing inflammation and oxidative stress.
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Affiliation(s)
- Xingli Xu
- Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital of Shandong University, Jinan, Shandong 250012, P.R. China
| | - Xiaoling Liu
- Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital of Shandong University, Jinan, Shandong 250012, P.R. China
| | - Liwen Yu
- Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital of Shandong University, Jinan, Shandong 250012, P.R. China
| | - Jing Ma
- Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital of Shandong University, Jinan, Shandong 250012, P.R. China
| | - Sufang Yu
- Department of Neurology, The Fourth People's Hospital, Liaocheng, Shandong 252002, P.R. China
| | - Mei Ni
- Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital of Shandong University, Jinan, Shandong 250012, P.R. China
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Antioxidative Property and Molecular Mechanisms Underlying Geniposide-Mediated Therapeutic Effects in Diabetes Mellitus and Cardiovascular Disease. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:7480512. [PMID: 31089416 PMCID: PMC6476013 DOI: 10.1155/2019/7480512] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2018] [Revised: 02/07/2019] [Accepted: 02/13/2019] [Indexed: 02/07/2023]
Abstract
Geniposide, an iridoid glucoside, is a major component in the fruit of Gardenia jasminoides Ellis (Gardenia fruits). Geniposide has been experimentally proved to possess multiple pharmacological actions involving antioxidative stress, anti-inflammatory, antiapoptosis, antiangiogenesis, antiendoplasmic reticulum stress (ERS), etc. In vitro and in vivo studies have further identified the value of geniposide in a spectrum of preclinical models of diabetes mellitus (DM) and cardiovascular disorders. The antioxidative property of geniposide should be attributed to the result of either the inhibition of numerous pathological processes or the activation of various proteins associated with cell survival or a combination of both. In this review, we will summarize the available knowledge on the antioxidative property and protective effects of geniposide in DM and cardiovascular disease in the literature and discuss antioxidant mechanisms as well as its potential applications in clinic.
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The Role of Traditional Chinese Medicine in the Regulation of Oxidative Stress in Treating Coronary Heart Disease. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:3231424. [PMID: 30918578 PMCID: PMC6409025 DOI: 10.1155/2019/3231424] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2018] [Revised: 01/19/2019] [Accepted: 02/04/2019] [Indexed: 02/06/2023]
Abstract
Oxidative stress has been closely related with coronary artery disease. In coronary heart disease (CHD), an excess of reactive oxygen species (ROS) production generates endothelial cell and smooth muscle functional disorders, leading to a disequilibrium between the antioxidant capacity and prooxidants. ROS also leads to inflammatory signal activation and mitochondria-mediated apoptosis, which can promote and increase the occurrence and development of CHD. There are several kinds of antioxidative and small molecular systems of antioxidants, such as β-carotene, ascorbic acid, α-tocopherol, and reduced glutathione (GSH). Studies have shown that antioxidant treatment was effective and decreased the risk of CHD, but the effect of the treatment varies greatly. Traditional Chinese medicine (TCM) has been utilized for thousands of years in China and is becoming increasingly popular all over the world, especially for the treatments of cardiovascular diseases. This review will concentrate on the evidence of the action mechanism of TCM in preventing CHD by modulating oxidative stress-related signaling pathways.
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Shahzad S, Mateen S, Naeem SS, Akhtar K, Rizvi W, Moin S. Syringic acid protects from isoproterenol induced cardiotoxicity in rats. Eur J Pharmacol 2019; 849:135-145. [PMID: 30731086 DOI: 10.1016/j.ejphar.2019.01.056] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2018] [Revised: 01/23/2019] [Accepted: 01/30/2019] [Indexed: 01/26/2023]
Abstract
Identification of pharmacologically potent antioxidant compounds for their use in preventive medicine is thrust area of current research. This study was undertaken with the aim of determining the protective role of syringic acid (SA) on isoproterenol (ISO) induced myocardial infarction (MI) in rats. SA was orally given to rats for 21 days at three different concentrations (12.5, 25 and 50 mg/kg). At 20th and 21st day, rats were subcutaneously injected with ISO and at the end of experimental period, rats were killed. ISO induced myocardial damage was averted by pre-co-treatment of SA, as decrease was found in serum level of marker enzymes (CKMB, LDH, AST, ALT), lipid peroxidation, protein carbonyl (PC) and proinflammatory cytokines (TNFα, IL 6). Furthermore, content of glutathione (GSH) and activities of antioxidant enzymes in heart tissue were significantly raised. Improvement in infarct size and erythrocyte (RBCs) morphology was also observed. The biochemical findings were supported by histopathological outcome and protective effect of SA was found to be dose dependent. The results of our study demonstrated that the cardioprotective potential of SA in rat model of ISO induced MI might be due to anti-lipid peroxidative and endogenous antioxidant system enhancement effects.
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Affiliation(s)
- Sumayya Shahzad
- Department of Biochemistry, Jawaharlal Nehru Medical College, Faculty of Medicine, Aligarh Muslim University, Aligarh 202002, Uttar Pradesh, India
| | - Somaiya Mateen
- Department of Biochemistry, Jawaharlal Nehru Medical College, Faculty of Medicine, Aligarh Muslim University, Aligarh 202002, Uttar Pradesh, India
| | - Syed Shariq Naeem
- Department of Pharmacology, Jawaharlal Nehru Medical College, Faculty of Medicine, Aligarh Muslim University, Aligarh 202002, Uttar Pradesh, India
| | - Kafil Akhtar
- Department of Pathology, Jawaharlal Nehru Medical College, Faculty of Medicine, Aligarh Muslim University, Aligarh 202002, Uttar Pradesh, India
| | - Waseem Rizvi
- Department of Pharmacology, Jawaharlal Nehru Medical College, Faculty of Medicine, Aligarh Muslim University, Aligarh 202002, Uttar Pradesh, India
| | - Shagufta Moin
- Department of Biochemistry, Jawaharlal Nehru Medical College, Faculty of Medicine, Aligarh Muslim University, Aligarh 202002, Uttar Pradesh, India.
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Mitochondrial dynamics in exercise physiology. Pflugers Arch 2019; 472:137-153. [DOI: 10.1007/s00424-019-02258-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2019] [Accepted: 01/17/2019] [Indexed: 12/11/2022]
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Tang B, Ma J, Ha X, Zhang Y, Xing Y. Tumor necrosis factor-alpha upregulated PHLPP1 through activating nuclear factor-kappa B during myocardial ischemia/reperfusion. Life Sci 2018; 207:355-363. [PMID: 29940243 DOI: 10.1016/j.lfs.2018.06.023] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2018] [Revised: 06/19/2018] [Accepted: 06/21/2018] [Indexed: 12/18/2022]
Abstract
AIMS The pleckstrin homology domain leucine-rich repeat protein phosphatase 1 (PHLPP1) specifically regulates phospho-Ser473 of protein kinase B (PKB, Akt) opposing cell survival during myocardial ischemia/reperfusion (I/R). Previous studies demonstrated PHLPP1 expression level was controlled by several mechanisms. However, the regulation mechanism of cardiac PHLPP1 expression following myocardial I/R remains unknown. MAIN METHODS The current study utilized the mouse model of myocardial I/R injury in vivo and the neonatal rat ventricular myocytes (NRVMs) of hypoxia/reoxygenation (H/R) injury in vitro. Expression of PHLPP1, nuclear factor-kappa B (NF-κB) and pNF-κB were determined by western blot. The expression of PHLPP1 and translocation of NF-κB was assessed by immunofluorescence. Chromatin immunoprecipitation (ChIP) assay was used to detect the binding of NF-κB to the promoter region of phlpp1 gene. KEY FINDINGS Myocardial I/R had no effect on cardiac PHLPP1 expression following I/R (30 min/2 h) but decreased after 4 h reperfusion. In vitro, H/R (4 h/1 h) and tumor necrosis factor-alpha (TNF-α)-stimulation resulted in upregulation of PHLPP1 in NRVMs, which was blocked with etanercept. Yet, H2O2-induced oxidative stress had no obvious effect on PHLPP1 expression of NRVMs at early stage but N-acetylcysteine (NAC) pretreatment increased PHLPP1 levels after 4 h H2O2 stimulation. TNF-α and H/R led to both expression and transcriptional activity of NF-κB, accompany with higher expression of PHLPP1. Pyrrolidine dithiocarbamate (PDTC), a NF-κB inhibitor, prevented the response not only in TNF-α-treated cardiomyocytes but also in H/R-treated group. SIGNIFICANCE These results implicated that TNF-α involved in cardiac PHLPP1 upregulation during reoxygenation, which was mediated by NF-κB transcriptional activity.
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Affiliation(s)
- Bin Tang
- Department of International Medical, China-Japan Friendship Hospital, Beijing 100029, China
| | - Jing Ma
- Department of Traditional Chinese Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China
| | - Xiaoqin Ha
- Department of Clinical Laboratory Medicine, Lanzhou General Hospital of Lanzhou Military Region, People's Liberation Army, Key Laboratory of Stem Cell and Gene Drug in Gansu Province, Lanzhou 730000, China
| | - Yuanqiang Zhang
- Department of Histology and Embryology, Fourth Military Medical University, Xi'an 710032, China.
| | - Yuan Xing
- Department of Clinical Laboratory Medicine, Lanzhou General Hospital of Lanzhou Military Region, People's Liberation Army, Key Laboratory of Stem Cell and Gene Drug in Gansu Province, Lanzhou 730000, China.
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Penna C, Sorge M, Femminò S, Pagliaro P, Brancaccio M. Redox Aspects of Chaperones in Cardiac Function. Front Physiol 2018; 9:216. [PMID: 29615920 PMCID: PMC5864891 DOI: 10.3389/fphys.2018.00216] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Accepted: 02/26/2018] [Indexed: 12/14/2022] Open
Abstract
Molecular chaperones are stress proteins that allow the correct folding or unfolding as well as the assembly or disassembly of macromolecular cellular components. Changes in expression and post-translational modifications of chaperones have been linked to a number of age- and stress-related diseases including cancer, neurodegeneration, and cardiovascular diseases. Redox sensible post-translational modifications, such as S-nitrosylation, glutathionylation and phosphorylation of chaperone proteins have been reported. Redox-dependent regulation of chaperones is likely to be a phenomenon involved in metabolic processes and may represent an adaptive response to several stress conditions, especially within mitochondria, where it impacts cellular bioenergetics. These post-translational modifications might underlie the mechanisms leading to cardioprotection by conditioning maneuvers as well as to ischemia/reperfusion injury. In this review, we discuss this topic and focus on two important aspects of redox-regulated chaperones, namely redox regulation of mitochondrial chaperone function and cardiac protection against ischemia/reperfusion injury.
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Affiliation(s)
- Claudia Penna
- Department of Clinical and Biological Sciences, University of Torino, Torino, Italy
| | - Matteo Sorge
- Department of Molecular Biotechnology and Health Sciences, University of Torino, Torino, Italy
| | - Saveria Femminò
- Department of Clinical and Biological Sciences, University of Torino, Torino, Italy
| | - Pasquale Pagliaro
- Department of Clinical and Biological Sciences, University of Torino, Torino, Italy
| | - Mara Brancaccio
- Department of Molecular Biotechnology and Health Sciences, University of Torino, Torino, Italy
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Femminò S, Penna C, Bessone F, Caldera F, Dhakar N, Cau D, Pagliaro P, Cavalli R, Trotta F. α-Cyclodextrin and α-Cyclodextrin Polymers as Oxygen Nanocarriers to Limit Hypoxia/Reoxygenation Injury: Implications from an In Vitro Model. Polymers (Basel) 2018; 10:polym10020211. [PMID: 30966247 PMCID: PMC6414891 DOI: 10.3390/polym10020211] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 02/14/2018] [Accepted: 02/16/2018] [Indexed: 01/20/2023] Open
Abstract
The incidence of heart failure (HF) is increasing worldwide and myocardial infarction (MI), which follows ischemia and reperfusion (I/R), is often at the basis of HF development. Nanocarriers are interesting particles for their potential application in cardiovascular disease. Impaired drug delivery in ischemic disease is challenging. Cyclodextrin nanosponges (NS) can be considered innovative tools for improving oxygen delivery in a controlled manner. This study has developed new α-cyclodextrin-based formulations as oxygen nanocarriers such as native α-cyclodextrin (α-CD), branched α-cyclodextrin polymer (α-CD POLY), and α-cyclodextrin nanosponges (α-CD NS). The three different α-CD-based formulations were tested at 0.2, 2, and 20 µg/mL to ascertain their capability to reduce cell mortality during hypoxia and reoxygenation (H/R) in vitro protocols. H9c2, a cardiomyoblast cell line, was exposed to normoxia (20% oxygen) or hypoxia (5% CO2 and 95% N2). The different formulations, applied before hypoxia, induced a significant reduction in cell mortality (in a range of 15% to 30%) when compared to samples devoid of oxygen. Moreover, their application at the beginning of reoxygenation induced a considerable reduction in cell death (12% to 20%). α-CD NS showed a marked efficacy in controlled oxygenation, which suggests an interesting potential for future medical application of polymer systems for MI treatment.
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Affiliation(s)
- Saveria Femminò
- Department of Clinical and Biological Sciences, University of Turin, 10043 Orbassano, Italy.
| | - Claudia Penna
- Department of Clinical and Biological Sciences, University of Turin, 10043 Orbassano, Italy.
| | - Federica Bessone
- Department of Drug Science and Technology, University of Turin, 10125 Turin, Italy.
| | - Fabrizio Caldera
- Department of Chemistry, University of Turin, 10125 Turin, Italy.
| | - Nilesh Dhakar
- Department of Chemistry, University of Turin, 10125 Turin, Italy.
| | - Daniele Cau
- Department of Clinical and Biological Sciences, University of Turin, 10043 Orbassano, Italy.
| | - Pasquale Pagliaro
- Department of Clinical and Biological Sciences, University of Turin, 10043 Orbassano, Italy.
| | - Roberta Cavalli
- Department of Drug Science and Technology, University of Turin, 10125 Turin, Italy.
| | - Francesco Trotta
- Department of Chemistry, University of Turin, 10125 Turin, Italy.
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Xia Y, Liu Y, Xia T, Li X, Huo C, Jia X, Wang L, Xu R, Wang N, Zhang M, Li H, Wang X. Activation of volume-sensitive Cl- channel mediates autophagy-related cell death in myocardial ischaemia/reperfusion injury. Oncotarget 2018; 7:39345-39362. [PMID: 27322431 PMCID: PMC5129937 DOI: 10.18632/oncotarget.10050] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Accepted: 06/03/2016] [Indexed: 12/19/2022] Open
Abstract
Excessive reactive oxygen species (ROS) plays an important role in myocardial ischemia/reperfusion (I/R) injury, which triggers not only myocardial cellular apoptosis but also autophagy-related cell death, in which volume-sensitive outwardly rectifying (VSOR) Cl− channel-activated by ROS contributes to cell apoptotic volume decrease, playing an incipient incident of cellular apoptosis. However, whether VSOR Cl− channel concurrently participates in autophagy-related cell death regulation remains unclear. To illuminate the issue, studies underwent in myocardial vitro and vivo I/R model. Rats were performed to ischemia 30 minutes and subsequent reperfusion 24-96 hours, ROS scavenger (NAC), VSOR Cl− channel blocker (DCPIB) and autophagy inhibitor (3MA) were administered respectively. Results showed that oxidative stress, LC3-II stain and inflammation in myocardial tissue were markedly increased, lysosome associated membrane protein-2 (LAMP2) were significantly reduced with I/R group as compared with sham group, reperfusion significantly led to damage in myocardial tissue and heart function, whereas the disorder could be rescued through these agents. Moreover, primary neonatal rat cardiomyocytes hypoxia/reoxygenation model were administered, results showed that VSOR Cl− channel-activated by reoxygenation could cause both cell volume decrease and intracellular acidification, which further increased LC3 and depleted of LAMP2, resulting in autophagy-related cell death. Interestingly, VSOR Cl− channel-blocked by DCPIB could stably maintain the cell volume, intracellular pH, abundant LAMP2 and autophagic intensity regardless of ROS intension derived from reoxygenation injury or adding H2O2. These results first demonstrate that VSOR Cl− channel-activated is a pivotal event to trigger autophagy-related death, which reveals a novel therapeutic target to decrease myocardial I/R injury.
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Affiliation(s)
- Yuesheng Xia
- Department of Geriatrics, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Yan Liu
- Department of Geriatrics, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Tong Xia
- Department of Preventive Medicine, Sun Yat-sen University, Guangzhou, China
| | - Xing Li
- Department of Geriatrics, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Cong Huo
- Department of Geriatrics, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Xin Jia
- Department of Geriatrics, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Lin Wang
- Department of Geriatrics, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Rong Xu
- Department of Geriatrics, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Ning Wang
- Department of Geriatrics, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Mingming Zhang
- Department of Cardiology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Hong Li
- Department of Geriatrics, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Xiaoming Wang
- Department of Geriatrics, Xijing Hospital, Fourth Military Medical University, Xi'an, China
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Regulation of protein function by S-nitrosation and S-glutathionylation: processes and targets in cardiovascular pathophysiology. Biol Chem 2017; 398:1267-1293. [DOI: 10.1515/hsz-2017-0150] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Accepted: 08/07/2017] [Indexed: 02/07/2023]
Abstract
AbstractDecades of chemical, biochemical and pathophysiological research have established the relevance of post-translational protein modifications induced by processes related to oxidative stress, with critical reflections on cellular signal transduction pathways. A great deal of the so-called ‘redox regulation’ of cell function is in fact mediated through reactions promoted by reactive oxygen and nitrogen species on more or less specific aminoacid residues in proteins, at various levels within the cell machinery. Modifications involving cysteine residues have received most attention, due to the critical roles they play in determining the structure/function correlates in proteins. The peculiar reactivity of these residues results in two major classes of modifications, with incorporation of NO moieties (S-nitrosation, leading to formation of proteinS-nitrosothiols) or binding of low molecular weight thiols (S-thionylation, i.e. in particularS-glutathionylation,S-cysteinylglycinylation andS-cysteinylation). A wide array of proteins have been thus analyzed in detail as far as their susceptibility to either modification or both, and the resulting functional changes have been described in a number of experimental settings. The present review aims to provide an update of available knowledge in the field, with a special focus on the respective (sometimes competing and antagonistic) roles played by proteinS-nitrosations andS-thionylations in biochemical and cellular processes specifically pertaining to pathogenesis of cardiovascular diseases.
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Ma L, Zhu J, Gao Q, Rebecchi MJ, Wang Q, Liu L. Restoring Pharmacologic Preconditioning in the Aging Heart: Role of Mitophagy/Autophagy. J Gerontol A Biol Sci Med Sci 2017; 72:489-498. [PMID: 27565512 DOI: 10.1093/gerona/glw168] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Accepted: 07/27/2016] [Indexed: 12/16/2022] Open
Abstract
We previously reported that pretreatment with the potent antioxidant TEMPOL improves mitochondrial function and restores preconditioning in the aging heart. Because mitophagy is implicated in cardiac preconditioning and declines with age, this study was designed to investigate how age influences mitophagy in response to preconditioning and whether TEMPOL pretreatment improves it. Old (22-24 months) rats were pretreated with or without 4-week TEMPOL and compared with young (4-6 months) untreated rats. Cardioprotection induced by isoflurane (ISO) in vivo and in isolated cardiomyocytes in vitro was assessed following ischemia/reperfusion and simulated hypoxia/reoxygenation, respectively. Mitophagy was determined by comparing the levels/subcellular locations of key mitophagic markers using Western blotting and immunofluorescence techniques. ISO preconditioned the young but not old heart in vivo and in vitro. Aging impaired ISO-induced mitochondrial accumulation of PINK1 and Parkin, as well as mitochondrial ubiquitination, and baseline and ISO-induced autophagic flux assessed by LC3 puncta, membrane associated LC3-II and p62. Pretreatment with TEMPOL improved these processes and restored ISO preconditioning. Inhibition of autophagy abolished ISO-induced protection in cardiomyocytes from young and TEMPOL pretreated old rats. Thus, antioxidant pretreatment significantly improves mitophagic response to ISO in old myocardium, which may contribute to restoration of cardioprotection in senescent animals.
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Affiliation(s)
- Li Ma
- Department of Anesthesiology, School of Medicine, Stony Brook University, New York
| | - Jiang Zhu
- Department of Anesthesiology, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, People's Republic of China
| | - Qun Gao
- Department of Anesthesiology, School of Medicine, Stony Brook University, New York
| | - Mario J Rebecchi
- Department of Anesthesiology, School of Medicine, Stony Brook University, New York
| | - Qiang Wang
- Department of Anesthesiology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, People's Republic of China
| | - Lixin Liu
- Department of Anesthesiology, School of Medicine, Stony Brook University, New York
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Ding Y, Gao BB, Zhou L, Ye XH, Li H, Lai L, Huang JY. Clinical implications of plasma Nogo-A levels in patients with coronary heart disease. Arch Med Sci 2017; 13:771-777. [PMID: 28721144 PMCID: PMC5510510 DOI: 10.5114/aoms.2016.58713] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Accepted: 12/28/2015] [Indexed: 11/28/2022] Open
Abstract
INTRODUCTION Nogo-A is an important neurite growth-regulatory protein in the adult and developing nervous system. Recently, increasing evidence has shown that Nogo-A plays important roles in cardiac development and may act as a potential indicator for heart failure. In addition, increased oxidative stress has been found in individuals with cardiovascular diseases. However, not much is known regarding the expression levels of Nogo-A and reactive oxygen species (ROS) in patients with coronary heart disease (CHD). Therefore, we sought to investigate the relationship between Nogo-A, ROS levels and CHD. MATERIAL AND METHODS The plasma Nogo-A and ROS concentrations of 122 acute coronary syndrome (ACS), 101 unstable angina pectoris (UAP), and 21 acute myocardial infarction (AMI) patients and 56 healthy controls were measured by enzyme-linked immunosorbent assay (ELISA). We further generated a receiver operating characteristic (ROC) curve to assess the diagnostic accuracy of Nogo-A and ROS in CHD. RESULTS The Nogo-A and ROS levels were significantly higher in patients with CHD than those in healthy controls. In addition, multivariate logistic regression analysis revealed that the level of Nogo-A (odds ratio (OR) = 1.624, 95% confidence interval: 1.125-2.293, p = 0.009) is a risk factor for prediction of CHD. Nogo-A has diagnostic value, with an optimal threshold of 5.466 ng/ml for maximized diagnostic performance (59% sensitivity and 78.6% specificity, area under curve, p < 0.05). However, ROS concentration is not a risk factor for prediction of CHD (OR = 0.999, 95% confidence interval: 0.997-1.001, p = 0.320). CONCLUSIONS Increased plasma Nogo-A level may be associated with CHD.
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Affiliation(s)
- Yu Ding
- Hangzhou First People's Hospital, Nanjing Medical University, Hangzhou, China
| | - Bei-Bei Gao
- Hangzhou First People's Hospital, Nanjing Medical University, Hangzhou, China
| | - Liang Zhou
- Hangzhou First People's Hospital, Nanjing Medical University, Hangzhou, China
| | - Xian-Hua Ye
- Hangzhou First People's Hospital, Nanjing Medical University, Hangzhou, China
| | - Hong Li
- Hangzhou First People's Hospital, Nanjing Medical University, Hangzhou, China
| | - Lei Lai
- Hangzhou First People's Hospital, Nanjing Medical University, Hangzhou, China
| | - Jin-Yu Huang
- Hangzhou First People's Hospital, Nanjing Medical University, Hangzhou, China
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Santa-Helena E, Teixeira S, Castro MRD, Cabrera DDC, D'Oca CDRM, D'Oca MGM, Votto APS, Nery LEM, Gonçalves CAN. Protective role of the novel hybrid 3,5-dipalmitoyl-nifedipine in a cardiomyoblast culture subjected to simulated ischemia/reperfusion. Biomed Pharmacother 2017; 92:356-364. [PMID: 28554131 DOI: 10.1016/j.biopha.2017.05.091] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Revised: 05/22/2017] [Accepted: 05/22/2017] [Indexed: 12/21/2022] Open
Abstract
This work investigated the acute effects of the calcium channel blocker nifedipine and its new fatty hybrid derived from palmitic acid, 3,5-dipalmitoyl-nifedipine, compared to endocannabinoid anandamide during the process of inducing ischemia and reperfusion in cardiomyoblast H9c2 heart cells. The cardiomyoblasts were treated in 24 or 96-well plates (according to the test being performed) and maintaining the treatment until the end of hypoxia induction. The molecules were tested at concentrations of 10 and 100μM, cells were treated 24h after assembling the experimental plates and immediately before the I/R. Cell viability, apoptosis and necrosis, and generation of reactive oxygen species were evaluated. Nifedipine and 3,5-dipalmitoyl-nifedipine were used to assess radical scavenging potential and metal chelation. All tested molecules managed to reduce the levels of reactive oxygen species compared to the starvation+vehicle group. In in vitro assays, 3,5-dipalmitoyl-nifedipine showed more antioxidant activity than nifedipine. These results indicate the ability of this molecule to act as a powerful ROS scavenger. Cell viability was highest when cells were induced to I/R by both concentrations of anandamide and the higher concentration of DPN. These treatments also reduced cell death. Therefore, it was demonstrated that the process of hybridization of nifedipine with two palmitic acid chains assigns a greater cardioprotective effect to this molecule, thereby reducing the damage caused by hypoxia and reoxygenation in cardiomyoblast cultures.
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Affiliation(s)
- Eduarda Santa-Helena
- Graduate Program in Physiological Sciences, Comparative Animal Physiology, Institute of Biological Sciences, Universidade Federal do Rio Grande, FURG, Rio Grande, RS, Brazil; Institute of Biological Sciences, Universidade Federal do Rio Grande, FURG, Rio Grande, RS, Brazil
| | - Stefanie Teixeira
- Institute of Biological Sciences, Universidade Federal do Rio Grande, FURG, Rio Grande, RS, Brazil
| | - Micheli Rosa de Castro
- Graduate Program in Physiological Sciences, Comparative Animal Physiology, Institute of Biological Sciences, Universidade Federal do Rio Grande, FURG, Rio Grande, RS, Brazil
| | - Diego da Costa Cabrera
- Kolbe Organic Synthesis Laboratory, School of Chemistry and Food, FURG, Rio Grande, RS, Brazil
| | | | - Marcelo G Montes D'Oca
- Kolbe Organic Synthesis Laboratory, School of Chemistry and Food, FURG, Rio Grande, RS, Brazil
| | - Ana Paula S Votto
- Graduate Program in Physiological Sciences, Comparative Animal Physiology, Institute of Biological Sciences, Universidade Federal do Rio Grande, FURG, Rio Grande, RS, Brazil; Institute of Biological Sciences, Universidade Federal do Rio Grande, FURG, Rio Grande, RS, Brazil
| | - Luiz Eduardo Maia Nery
- Graduate Program in Physiological Sciences, Comparative Animal Physiology, Institute of Biological Sciences, Universidade Federal do Rio Grande, FURG, Rio Grande, RS, Brazil; Institute of Biological Sciences, Universidade Federal do Rio Grande, FURG, Rio Grande, RS, Brazil.
| | - Carla Amorim Neves Gonçalves
- Graduate Program in Physiological Sciences, Comparative Animal Physiology, Institute of Biological Sciences, Universidade Federal do Rio Grande, FURG, Rio Grande, RS, Brazil; Institute of Biological Sciences, Universidade Federal do Rio Grande, FURG, Rio Grande, RS, Brazil
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Shanmugam G, Narasimhan M, Conley RL, Sairam T, Kumar A, Mason RP, Sankaran R, Hoidal JR, Rajasekaran NS. Chronic Endurance Exercise Impairs Cardiac Structure and Function in Middle-Aged Mice with Impaired Nrf2 Signaling. Front Physiol 2017; 8:268. [PMID: 28515695 PMCID: PMC5413495 DOI: 10.3389/fphys.2017.00268] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Accepted: 04/11/2017] [Indexed: 12/18/2022] Open
Abstract
Nuclear factor erythroid 2 related factor 2 (Nrf2) signaling maintains the redox homeostasis and its activation is shown to suppress cardiac maladaptation. Earlier we reported that acute endurance exercise (2 days) evoked antioxidant cytoprotection in young WT animals but not in aged WT animals. However, the effect of repeated endurance exercise during biologic aging (WT) characterized by an inherent deterioration in Nrf2 signaling and pathological aging (pronounced oxidative susceptibility-Nrf2 absence) in the myocardium remains elusive. Thus, the purpose of our study was to determine the effect of chronic endurance exercise-induced cardiac adaptation in aged mice with and without Nrf2. Age-matched WT and Nrf2-null mice (Nrf2-/-) (>22 months) were subjected to 6 weeks chronic endurance exercise (25 meter/min, 12% grade). The myocardial redox status was assessed by expression of antioxidant defense genes and proteins along with immunochemical detection of DMPO-radical adduct, GSH-NEM, and total ubiquitination. Cardiac functions were assessed by echocardiography and electrocardiogram. At sedentary state, loss of Nrf2 resulted in significant downregulation of antioxidant gene expression (Nqo1, Ho1, Gclm, Cat, and Gst-α) with decreased GSH-NEM immuno-fluorescence signals. While Nrf2-/- mice subjected to CEE showed an either similar or more pronounced reduction in the transcript levels of Gclc, Nqo1, Gsr, and Gst-α in relation to WT littermates. In addition, the hearts of Nrf2-/- on CEE showed a substantial reduction in specific antioxidant proteins, G6PD and CAT along with decreased GSH, a pronounced increase in DMPO-adduct and the total ubiquitination levels. Further, CEE resulted in a significant upregulation of hypertrophy genes (Anf, Bnf, and β-Mhc) (p < 0.05) in the Nrf2-/- hearts in relation to WT mice. Moreover, the aged Nrf2-/- mice exhibited a higher degree of cardiac remodeling in association with a significant decrease in fractional shortening, pronounced ST segment, and J wave elevation upon CEE compared to age-matched WT littermates. In conclusion, our findings indicate that while the aged WT and Nrf2 knockout animals both exhibit hypertrophy after CEE, the older Nrf2 knockouts showed ventricular remodeling coupled with profound cardiac functional abnormalities and diastolic dysfunction.
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Affiliation(s)
- Gobinath Shanmugam
- Cardiac Aging and Redox Signaling Laboratory, Division of Molecular and Cellular Pathology, Department of Pathology, University of Alabama at BirminghamBirmingham, AL, USA
| | - Madhusudhanan Narasimhan
- Department of Pharmacology and Neuroscience, Texas Tech University Health Sciences CenterLubbock, TX, USA
| | - Robbie L. Conley
- Cardiac Aging and Redox Signaling Laboratory, Division of Molecular and Cellular Pathology, Department of Pathology, University of Alabama at BirminghamBirmingham, AL, USA
| | - Thiagarajan Sairam
- PSG Center for Molecular Medicine and Therapeutics, PSG Institute of Medical Sciences and Research, PSG HospitalsCoimbatore, India
| | - Ashutosh Kumar
- Immunity, Inflammation, and Disease Laboratory, NIEHS/NIHRaleigh, NC, USA
| | - Ronald P. Mason
- Immunity, Inflammation, and Disease Laboratory, NIEHS/NIHRaleigh, NC, USA
| | - Ramalingam Sankaran
- PSG Center for Molecular Medicine and Therapeutics, PSG Institute of Medical Sciences and Research, PSG HospitalsCoimbatore, India
| | - John R. Hoidal
- Division of Pulmonary, Department of Medicine, University of Utah School of MedicineSalt Lake City, UT, USA
| | - Namakkal S. Rajasekaran
- Cardiac Aging and Redox Signaling Laboratory, Division of Molecular and Cellular Pathology, Department of Pathology, University of Alabama at BirminghamBirmingham, AL, USA
- PSG Center for Molecular Medicine and Therapeutics, PSG Institute of Medical Sciences and Research, PSG HospitalsCoimbatore, India
- Division of Cardiovascular Medicine, Department of Medicine, University of Utah School of MedicineSalt Lake City, UT, USA
- Center for Free Radical Biology, University of Alabama at BirminghamBirmingham, AL, USA
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Tullio F, Penna C, Cabiale K, Femminò S, Galloni M, Pagliaro P. Cardioprotective effects of calcitonin gene-related peptide in isolated rat heart and in H9c2 cells via redox signaling. Biomed Pharmacother 2017; 90:194-202. [PMID: 28364596 DOI: 10.1016/j.biopha.2017.03.043] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Revised: 03/10/2017] [Accepted: 03/14/2017] [Indexed: 02/02/2023] Open
Abstract
The calcitonin-gene-related-peptide (CGRP) release is coupled to the signaling of Angeli's salt in determining vasodilator effects. However, it is unknown whether CGRP is involved in Angeli's salt cardioprotective effects and which are the mechanisms of protection. We aimed to determine whether CGRP is involved in myocardial protection induced by Angeli's salt. We also analyzed the intracellular signaling pathway activated by CGRP. Isolated rat hearts were pre-treated with Angeli's salt or Angeli's salt plus CGRP8-37, a specific CGRP-receptor antagonist, and subjected to ischemia (30-min) and reperfusion (120-min). Moreover, we studied CGRP-induced protection during oxidative stress (H2O2) and hypoxia/reoxygenation protocols in H9c2 cardiomyocytes. Cell vitality and mitochondrial membrane potential (ΔYm, MMP) were measured using MTT and JC-1 dyes. Angeli's salt reduced infarct size and ameliorated post-ischemic cardiac function via a CGRP-receptor-dependent mechanism. Pre-treatment with CGRP increased H9c2 survival upon challenging with either H2O2 (redox stress) or hypoxia/reoxygenation (H/R stress). Under these stress conditions, reduction in MMP and cell death were partly prevented by CGRP. These CGRP beneficial effects were blocked by CGRP8-37. During H/R stress, pre-treatment with either CGRP-receptor, protein kinase C (PKC) or mitochondrial KATP channel antagonists, and pre-treatment with an antioxidant (2-mercaptopropionylglycine) blocked the protection mediated by CGRP. In conclusion, CGRP is involved in the cardioprotective effects of Angeli's salt. In H9c2 cardiomyocytes, CGRP elicits PKC-dependent and mitochondrial-KATP-redox-dependent mechanisms. Hence, CGRP is an important factor in the redox-sensible cardioprotective effects of Angeli's salt.
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Affiliation(s)
- Francesca Tullio
- Department of Clinical and Biological Sciences, University of Turin, Italy
| | - Claudia Penna
- Department of Clinical and Biological Sciences, University of Turin, Italy.
| | - Karine Cabiale
- Department of Clinical and Biological Sciences, University of Turin, Italy; Department of Veterinary Science, University of Torino, Italy
| | - Saveria Femminò
- Department of Clinical and Biological Sciences, University of Turin, Italy
| | - Marco Galloni
- Department of Veterinary Science, University of Torino, Italy
| | - Pasquale Pagliaro
- Department of Clinical and Biological Sciences, University of Turin, Italy.
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Deidda M, Madonna R, Mango R, Pagliaro P, Bassareo PP, Cugusi L, Romano S, Penco M, Romeo F, Mercuro G. Novel insights in pathophysiology of antiblastic drugs-induced cardiotoxicity and cardioprotection. J Cardiovasc Med (Hagerstown) 2017; 17 Suppl 1 Special issue on Cardiotoxicity from Antiblastic Drugs and Cardioprotection:e76-e83. [PMID: 27755245 DOI: 10.2459/jcm.0000000000000373] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Despite advances in supportive and protective therapy for myocardial function, heart failure caused by various clinical conditions, including cardiomyopathy due to antineoplastic therapy, remains a major cause of morbidity and mortality. Because of the limitations associated with current therapies, investigators have been searching for alternative treatments that can effectively repair the damaged heart and permanently restore its function. Damage to the heart can result from both traditional chemotherapeutic agents, such as anthracyclines, and new targeted therapies, such as trastuzumab. Because of this unresolved issue, investigators are searching for alternative therapeutic strategies. In this article, we present state-of-the-art technology with regard to the genomic and epigenetic mechanisms underlying cardiotoxicity and cardioprotection, the role of anticancer in influencing the redox (reduction/oxidation) balance and the function of stem cells in the repair/regeneration of the adult heart. These findings, although not immediately transferable to clinical applications, form the basis for the development of personalized medicine based on the prevention of cardiotoxicity with the use of genetic testing. Proteomics, metabolomics and investigations on reactive oxygen species-dependent pathways, particularly those that interact with the production of NO and energy metabolism, appear to be promising for the identification of early markers of cardiotoxicity and for the development of cardioprotective agents. Finally, autologous cardiac stem and progenitor cells may represent future contributions in the field of myocardial protection and recovery in the context of antiblastic therapy.
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Affiliation(s)
- Martino Deidda
- aDepartment of Medical Sciences 'M. Aresu', University of Cagliari, Cagliari bInstitute of Cardiology, Center of Excellence on Aging, 'G. d'Annunzio' University, Chieti cDepartment of Systems Medicine, University of Rome 'Tor Vergata', Rome dDepartment of Clinical and Biological Sciences, University of Turin, Orbassano eDepartment of Clinical Medicine, Public Health, Life and Environment Sciences, University of L'Aquila, L'Aquila, Italy
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Momordica charantia polysaccharides ameliorate oxidative stress, hyperlipidemia, inflammation, and apoptosis during myocardial infarction by inhibiting the NF-κB signaling pathway. Int J Biol Macromol 2017; 97:544-551. [PMID: 28109806 DOI: 10.1016/j.ijbiomac.2017.01.074] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Revised: 01/02/2017] [Accepted: 01/15/2017] [Indexed: 01/07/2023]
Abstract
The polysaccharide extract of Momordica charantia has various biological activities; however, its effect on endothelial dysfunction in myocardial infarction remains unclear. To elucidate this, myocardial infarction was induced in rats using isoproterenol (ISP). Pretreatment with M. charantia polysaccharides (MCP; 150 or 300mg/kg) for 25days significantly inhibited increases in heart weight, the heart-weight-to-body-weight ratio, and infarction size, and ameliorated the increased serum levels of aspartate transaminase, creatine kinase, lactate dehydrogenase, total cholesterol, triglycerides, very-low-density lipoprotein cholesterol, low-density lipoprotein cholesterol, and high-density lipoprotein cholesterol. In addition, MCP enhanced the activity of superoxide dismutase, catalase, and non-protein sulfhydryls, and decreased the level of lipid peroxidation. Moreover, MCP pretreatment downregulated the expression of proinflammatory cytokines (tumor necrosis factor alpha, interleukin (IL)-6, and IL-10), inflammatory markers (nitric oxide, myeloperoxidase, and inducible nitric oxide synthase), and apoptotic markers (caspase-3 and BAX), and upregulated Bcl-2 expression. Pretreatment with MCP reduced myonecrosis, edema, and inflammatory cell infiltration, and restored cardiomyocytes architecture. This myocardial protective effect could be related to the enhancement of the antioxidant defense system through the nuclear factor kappa B (NF-kB) pathways, and to anti-apoptosis through regulation of Bax, caspase-3, and Bcl-2.
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69
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Wang L, Zhang Y, Wan H, Jin W, Yu L, Zhou H, Yang J. Glycyrrhetinic acid protects H9c2 cells from oxygen glucose deprivation-induced injury through the PI3K/AKt signaling pathway. J Nat Med 2016; 71:27-35. [PMID: 27406329 DOI: 10.1007/s11418-016-1023-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Accepted: 06/27/2016] [Indexed: 12/24/2022]
Abstract
Glycyrrhetinic acid (GA) is an ingredient of triterpene saponins found in Gancao (Radix Glycyrrhizae). Here, we investigated the protective effects of GA in H9c2 cells, and explored its possible mechanism of action. Different concentrations of GA were used to treat H9c2 cells under oxygen glucose deprivation. We analyzed cell necrosis and apoptosis using optical microscopy, Hoechst 33342 staining, FITC-annexin V/PI double-staining and lactate dehydrogenase (LDH), creatine kinase-MB (CK-MB) and interleukin (IL)-1β assays. Changes in related pro-apoptosis and anti-apoptosis proteins were detected by Western blot. Optical microscopy showed that GA improved cell morphology, including cell shrinkage, cauliflower-like membrane blebbing, and even some cell debris. Meanwhile, GA also ameliorated cell nuclei characteristics such as nucleus size, chromatin condensation and bright staining from Hoechst 33342 staining. GA also lowered the apoptotic rate and the levels of LDH, CK-MB and IL-1β in a dose-dependent manner. Furthermore, GA treatment increased Bcl-2 protein expression and decreased caspase-8 and Bax protein expression, while elevating the Bcl-2/Bax ratio. GA preconditioning increased p-AKt protein expression; however, after adding LY 294002, the p-AKt expression decreased obviously. Our results demonstrated that GA could protect H9c2 cells from apoptosis in a dose-dependent manner, and the potential mechanism might be related to the PI3K/AKt signaling pathway.
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Affiliation(s)
- Liqin Wang
- Zhejiang Chinese Medical University, 548 Binwen Road, Hangzhou, 310053, Zhejiang, People's Republic of China
| | - Yuyan Zhang
- Zhejiang Chinese Medical University, 548 Binwen Road, Hangzhou, 310053, Zhejiang, People's Republic of China
| | - Haitong Wan
- Zhejiang Chinese Medical University, 548 Binwen Road, Hangzhou, 310053, Zhejiang, People's Republic of China
| | - Weifeng Jin
- Zhejiang Chinese Medical University, 548 Binwen Road, Hangzhou, 310053, Zhejiang, People's Republic of China
| | - Li Yu
- Zhejiang Chinese Medical University, 548 Binwen Road, Hangzhou, 310053, Zhejiang, People's Republic of China
| | - Huifen Zhou
- Zhejiang Chinese Medical University, 548 Binwen Road, Hangzhou, 310053, Zhejiang, People's Republic of China
| | - Jiehong Yang
- Zhejiang Chinese Medical University, 548 Binwen Road, Hangzhou, 310053, Zhejiang, People's Republic of China.
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Donato M, Goyeneche MA, Garces M, Marchini T, Pérez V, Del Mauro J, Höcht C, Rodríguez M, Evelson P, Gelpi RJ. Myocardial triggers involved in activation of remote ischaemic preconditioning. Exp Physiol 2016; 101:708-16. [PMID: 27028009 DOI: 10.1113/ep085535] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Accepted: 03/22/2016] [Indexed: 12/15/2022]
Abstract
NEW FINDINGS What is the central question of this study? Ischaemia-reperfusion of peripheral tissues protects the heart from subsequent myocardial ischaemia-reperfusion injury, a phenomenon referred to as remote ischaemic preconditioning (rIPC). This study evaluated the possible myocardial triggers of rIPC. What is the main finding and its importance? Remote ischaemic preconditioning reduces infarct size through a vagal pathway and a mechanism involving phosphorylation of Akt and endothelial nitric oxide synthase, opening of mitochondrial ATP-dependent K(+) channels and an increase in mitochondrial H2 O2 production. All these phenomena occur before the myocardial ischaemia; hence, they could act as 'triggers' of rIPC. It has been proposed that remote ischaemic preconditioning (rIPC) activates a parasympathetic neural pathway. However, the myocardial intracellular mechanism of rIPC remains unclear. Here, we characterized some of the intracellular signals participating as rIPC triggers. Isolated rat hearts were subjected to 30 min of global ischaemia and 120 min of reperfusion (Non-rIPC group). In a second group, before the isolation of the heart, an rIPC protocol (three cycles of hindlimb ischaemia-reperfusion) was performed. The infarct size was measured with tetrazolium staining. Expression/phosphorylation of Akt and endothelial nitric oxide synthase (eNOS) and mitochondrial H2 O2 production were evaluated at the end of the rIPC protocol, before myocardial ischaemia-reperfusion. The rIPC significantly decreased the infarct size and induced Akt and eNOS phosphorylation. The protective effect on infarct size was abolished by cervical vagal section, l-NAME (an NO synthesis inhibitor) and 5-hydroxydecanoate (a mitochondrial ATP-dependent K(+) channel blocker). Mitochondrial production of H2 O2 was increased by rIPC, whereas it was abolished by cervical vagal section, l-NAME and 5-hydroxydecanoate. We conclude that rIPC activates a parasympathetic vagal pathway and a mechanism involving the phosphorylation of Akt and eNOS, the opening of mitochondrial ATP-dependent K(+) channels and the release of H2 O2 by the mitochondria. All these phenomena occur before myocardial ischaemia and could act as triggers of rIPC.
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Affiliation(s)
- Martín Donato
- Institute of Cardiovascular Pathophysiology (INFICA), Department of Pathology, Faculty of Medicine, University of Buenos Aires, Argentina.,Institute of Biochemistry and Molecular Medicine (IBIMOL, UBA-CONICET), Faculty of Medicine, University of Buenos Aires, Argentina
| | - María A Goyeneche
- Institute of Cardiovascular Pathophysiology (INFICA), Department of Pathology, Faculty of Medicine, University of Buenos Aires, Argentina
| | - Mariana Garces
- Institute of Biochemistry and Molecular Medicine (IBIMOL, UBA-CONICET), Faculty of Pharmacy and Biochemistry, University of Buenos Aires, Argentina
| | - Timoteo Marchini
- Institute of Biochemistry and Molecular Medicine (IBIMOL, UBA-CONICET), Faculty of Pharmacy and Biochemistry, University of Buenos Aires, Argentina
| | - Virginia Pérez
- Institute of Cardiovascular Pathophysiology (INFICA), Department of Pathology, Faculty of Medicine, University of Buenos Aires, Argentina.,Institute of Biochemistry and Molecular Medicine (IBIMOL, UBA-CONICET), Faculty of Medicine, University of Buenos Aires, Argentina
| | - Julieta Del Mauro
- Department of Pharmacology, Faculty of Pharmacy and Biochemistry, University of Buenos Aires, Argentina
| | - Christian Höcht
- Department of Pharmacology, Faculty of Pharmacy and Biochemistry, University of Buenos Aires, Argentina
| | - Manuel Rodríguez
- Institute of Cardiovascular Pathophysiology (INFICA), Department of Pathology, Faculty of Medicine, University of Buenos Aires, Argentina.,Institute of Biochemistry and Molecular Medicine (IBIMOL, UBA-CONICET), Faculty of Medicine, University of Buenos Aires, Argentina
| | - Pablo Evelson
- Institute of Biochemistry and Molecular Medicine (IBIMOL, UBA-CONICET), Faculty of Pharmacy and Biochemistry, University of Buenos Aires, Argentina
| | - Ricardo J Gelpi
- Institute of Cardiovascular Pathophysiology (INFICA), Department of Pathology, Faculty of Medicine, University of Buenos Aires, Argentina.,Institute of Biochemistry and Molecular Medicine (IBIMOL, UBA-CONICET), Faculty of Medicine, University of Buenos Aires, Argentina
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The Role of Mitochondrial Reactive Oxygen Species in Cardiovascular Injury and Protective Strategies. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2016; 2016:8254942. [PMID: 27200148 PMCID: PMC4856919 DOI: 10.1155/2016/8254942] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/21/2016] [Revised: 03/29/2016] [Accepted: 03/30/2016] [Indexed: 12/14/2022]
Abstract
Ischaemia/reperfusion (I/R) injury of the heart represents a major health burden mainly associated with acute coronary syndromes. While timely coronary reperfusion has become the established routine therapy in patients with ST-elevation myocardial infarction, the restoration of blood flow into the previously ischaemic area is always accompanied by myocardial injury. The central mechanism involved in this phenomenon is represented by the excessive generation of reactive oxygen species (ROS). Besides their harmful role when highly generated during early reperfusion, minimal ROS formation during ischaemia and/or at reperfusion is critical for the redox signaling of cardioprotection. In the past decades, mitochondria have emerged as the major source of ROS as well as a critical target for cardioprotective strategies at reperfusion. Mitochondria dysfunction associated with I/R myocardial injury is further described and ultimately analyzed with respect to its role as source of both deleterious and beneficial ROS. Furthermore, the contribution of ROS in the highly investigated field of conditioning strategies is analyzed. In the end, the vascular sources of mitochondria-derived ROS are briefly reviewed.
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Guarini G, Kiyooka T, Ohanyan V, Pung YF, Marzilli M, Chen YR, Chen CL, Kang PT, Hardwick JP, Kolz CL, Yin L, Wilson GL, Shokolenko I, Dobson JG, Fenton R, Chilian WM. Impaired coronary metabolic dilation in the metabolic syndrome is linked to mitochondrial dysfunction and mitochondrial DNA damage. Basic Res Cardiol 2016; 111:29. [PMID: 27040114 DOI: 10.1007/s00395-016-0547-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Accepted: 03/09/2016] [Indexed: 12/11/2022]
Abstract
Mitochondrial dysfunction in obesity and diabetes can be caused by excessive production of free radicals, which can damage mitochondrial DNA. Because mitochondrial DNA plays a key role in the production of ATP necessary for cardiac work, we hypothesized that mitochondrial dysfunction, induced by mitochondrial DNA damage, uncouples coronary blood flow from cardiac work. Myocardial blood flow (contrast echocardiography) was measured in Zucker lean (ZLN) and obese fatty (ZOF) rats during increased cardiac metabolism (product of heart rate and arterial pressure, i.v. norepinephrine). In ZLN increased metabolism augmented coronary blood flow, but in ZOF metabolic hyperemia was attenuated. Mitochondrial respiration was impaired and ROS production was greater in ZOF than ZLN. These were associated with mitochondrial DNA (mtDNA) damage in ZOF. To determine if coronary metabolic dilation, the hyperemic response induced by heightened cardiac metabolism, is linked to mitochondrial function we introduced recombinant proteins (intravenously or intraperitoneally) in ZLN and ZOF to fragment or repair mtDNA, respectively. Repair of mtDNA damage restored mitochondrial function and metabolic dilation, and reduced ROS production in ZOF; whereas induction of mtDNA damage in ZLN reduced mitochondrial function, increased ROS production, and attenuated metabolic dilation. Adequate metabolic dilation was also associated with the extracellular release of ADP, ATP, and H2O2 by cardiac myocytes; whereas myocytes from rats with impaired dilation released only H2O2. In conclusion, our results suggest that mitochondrial function plays a seminal role in connecting myocardial blood flow to metabolism, and integrity of mtDNA is central to this process.
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Affiliation(s)
- Giacinta Guarini
- Cardio-Thoracic and Vascular Department, University of Pisa, Pisa, Italy
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, 4209 State Route 44, Rootstown, OH, 44272, USA
| | - Takahiko Kiyooka
- Division of Cardiology, Tokai University Oiso Hospital, Oiso, Japan
| | - Vahagn Ohanyan
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, 4209 State Route 44, Rootstown, OH, 44272, USA
| | - Yuh Fen Pung
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, 4209 State Route 44, Rootstown, OH, 44272, USA
- Department of Biomedical Science, University of Nottingham, Semenyih, Malaysia
| | - Mario Marzilli
- Cardio-Thoracic and Vascular Department, University of Pisa, Pisa, Italy
| | - Yeong Renn Chen
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, 4209 State Route 44, Rootstown, OH, 44272, USA
| | - Chwen Lih Chen
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, 4209 State Route 44, Rootstown, OH, 44272, USA
| | - Patrick T Kang
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, 4209 State Route 44, Rootstown, OH, 44272, USA
| | - James P Hardwick
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, 4209 State Route 44, Rootstown, OH, 44272, USA
| | - Christopher L Kolz
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, 4209 State Route 44, Rootstown, OH, 44272, USA
| | - Liya Yin
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, 4209 State Route 44, Rootstown, OH, 44272, USA
| | - Glenn L Wilson
- Department of Cell Biology and Neuroscience, University of South Alabama, Mobile, USA
| | - Inna Shokolenko
- Department of Biomedical Sciences, University of South Alabama, Mobile, USA
| | - James G Dobson
- Department of Microbiology and Physiological Systems, University of Massachusetts, Boston, USA
| | - Richard Fenton
- Department of Microbiology and Physiological Systems, University of Massachusetts, Boston, USA
| | - William M Chilian
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, 4209 State Route 44, Rootstown, OH, 44272, USA.
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Tang Y, Li S, Zhang P, Zhu J, Meng G, Xie L, Yu Y, Ji Y, Han Y. Soy Isoflavone Protects Myocardial Ischemia/Reperfusion Injury through Increasing Endothelial Nitric Oxide Synthase and Decreasing Oxidative Stress in Ovariectomized Rats. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2016; 2016:5057405. [PMID: 27057277 PMCID: PMC4753344 DOI: 10.1155/2016/5057405] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Revised: 12/29/2015] [Accepted: 12/31/2015] [Indexed: 01/16/2023]
Abstract
There is a special role for estrogens in preventing and curing cardiovascular disease in women. Soy isoflavone (SI), a soy-derived phytoestrogen, has similar chemical structure to endogenous estrogen-estradiol. We investigate to elucidate the protective mechanism of SI on myocardial ischemia/reperfusion (MI/R) injury. Female SD rats underwent bilateral ovariectomy. One week later, rats were randomly divided into several groups, sham ovariectomy (control group), ovariectomy with MI/R, or ovariectomy with sham MI/R. Other ovariectomy rats were given different doses of SI or 17β-estradiol (E2). Four weeks later, they were exposed to 30 minutes of left coronary artery occlusion followed by 6 or 24 hours of reperfusion. SI administration significantly reduced myocardial infarct size and improved left ventricle function and restored endothelium-dependent relaxation function of thoracic aortas after MI/R in ovariectomized rats. SI also decreased serum creatine kinase and lactate dehydrogenase activity, reduced plasma malonaldehyde, and attenuated oxidative stress in the myocardium. Meanwhile, SI increased phosphatidylinositol 3 kinase (PI3K)/Akt/endothelial nitric oxide synthase (eNOS) signal pathway. SI failed to decrease infarct size of hearts with I/R in ovariectomized rats if PI3K was inhibited. Overall, these results indicated that SI protects myocardial ischemia/reperfusion injury in ovariectomized rats through increasing PI3K/Akt/eNOS signal pathway and decreasing oxidative stress.
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Affiliation(s)
- Yan Tang
- Key Laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University, Nanjing 210029, China
| | - Shuangyue Li
- Key Laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University, Nanjing 210029, China
| | - Ping Zhang
- Department of Gynaecology, The First Public Hospital of Zhangjiagang, Zhangjiagang 215699, China
| | | | - Guoliang Meng
- Key Laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University, Nanjing 210029, China
- Department of Pharmacology, School of Pharmacy, Nantong University, Nantong 226001, China
| | - Liping Xie
- Key Laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University, Nanjing 210029, China
| | - Ying Yu
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Yong Ji
- Key Laboratory of Cardiovascular Disease and Molecular Intervention, Nanjing Medical University, Nanjing 210029, China
| | - Yi Han
- Department of Geriatrics, First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
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74
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Tuncay E, Turan B. Intracellular Zn(2+) Increase in Cardiomyocytes Induces both Electrical and Mechanical Dysfunction in Heart via Endogenous Generation of Reactive Nitrogen Species. Biol Trace Elem Res 2016; 169:294-302. [PMID: 26138011 DOI: 10.1007/s12011-015-0423-3] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Accepted: 06/23/2015] [Indexed: 12/23/2022]
Abstract
Oxidants increase intracellular free Zn(2+) concentration ([Zn(2+)]i) in ventricular myocytes, which contributes to oxidant-induced alterations in excitation-contraction coupling (ECC). However, it is not clear whether increased [Zn(2+)]i in cardiomyocytes via increased reactive nitrogen species (RNS) has a role on heart function under pathological conditions, such as hyperglycemia. In this study, first we aimed to investigate the role of increased [Zn(2+)]i under in vitro condition in the development of both electrical and mechanical dysfunction of isolated papillary muscle strips from rat heart via exposed samples to a Zn(2+)-ionophore (Zn-pyrithione; 1 μM) for 20 min. Under simultaneous measurement of intracellular action potential and contractile activity in these preparations, Zn-pyrithione exposure caused marked prolongation in action potential repolarization phase and slowdown in both contraction and relaxation rates of twitch activity. Second, in order to demonstrate an association between increased [Zn(2+)]i and increased RNS, we monitored intracellular [Zn(2+)]i under an acute exposure of nitric oxide (NO) donor sodium nitroprusside, SNP, in freshly isolated quiescent cardiomyocytes loaded with FluoZin-3. Resting level of free Zn(2+) is significantly higher in cardiomyocytes under hyperglycemic condition compared to those of the controls, which seems to be associated with increased level of RNS production in hyperglycemic cardiomyocytes. Western blot analysis showed that Zn-pyrithione exposure induced a marked decrease in the activity of protein phosphatase 1 and 2A, member of macromolecular protein complex of cardiac ryanodine receptors, RyR2, besides significant increase in the phosphorylation level of extracellular signal-regulated kinase1/2 as a concentration-dependent manner. Overall, the present data demonstrated that there is a cross-relationship between increased RNS production and increased [Zn(2+)]i level in cardiomyocytes under pathological conditions such as hyperglycemia.
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Affiliation(s)
- Erkan Tuncay
- Department of Biophysics, Ankara University Faculty of Medicine, 06100, Ankara, Turkey
| | - Belma Turan
- Department of Biophysics, Ankara University Faculty of Medicine, 06100, Ankara, Turkey.
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75
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Wang XX, Wang XL, Tong MM, Gan L, Chen H, Wu SS, Chen JX, Li RL, Wu Y, Zhang HY, Zhu Y, Li YX, He JH, Wang M, Jiang W. SIRT6 protects cardiomyocytes against ischemia/reperfusion injury by augmenting FoxO3α-dependent antioxidant defense mechanisms. Basic Res Cardiol 2016; 111:13. [PMID: 26786260 DOI: 10.1007/s00395-016-0531-z] [Citation(s) in RCA: 102] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Accepted: 01/08/2016] [Indexed: 02/05/2023]
Abstract
SIRT6, a member of the NAD(+)-dependent class III deacetylase sirtuin family, has been revealed to play important roles in promoting cellular resistance against oxidative stress. The formation of reactive oxygen species (ROS) and oxidative stress are the crucial mechanisms underlying cellular damage and dysfunction in cardiac ischemia/reperfusion (I/R) injury, but the role of SIRT6 in I/R-induced ROS and oxidative stress is poorly understood. In this study, by using heterozygous SIRT6 knockout (SIRT6(+/-)) mice and cultured neonatal cardiomyocyte models, we investigated how SIRT6 mediates oxidative stress and myocardial injury during I/R. Partial knockout (KO) of SIRT6 aggravated myocardial damage, ventricular remodeling, and oxidative stress in mice subjected to myocardial I/R, whereas restoration of SIRT6 expression by direct cardiac injection of adenoviral constructs encoding SIRT6 reversed these deleterious effects of SIRT6 KO in the ischemic heart. In addition, partial deletion of the SIRT6 gene decreased myocardial functional recovery following I/R in a Langendorff perfusion model. Similarly, the protective effects of SIRT6 were also observed in cultured cardiomyocytes following hypoxia/reoxygenation. Intriguingly, SIRT6 was noticed to up-regulate AMP/ATP and then activate the adenosine 5'-monophosphate-activated protein kinase (AMPK)-forkhead box O3α (FoxO3α) axis and further initiated the downstream antioxidant-encoding gene expression (manganese superoxide dismutase and catalase), thereby decreasing cellular levels of oxidative stress and mediating cardioprotection in the ischemic heart. These results suggest that SIRT6 protects the heart from I/R injury through FoxO3α activation in the ischemic heart in an AMP/ATP-induced AMPK-dependent way, thus upregulating antioxidants and suppressing oxidative stress.
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Affiliation(s)
- Xiao-Xiao Wang
- Molecular Medicine Research Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, People's Republic of China
| | - Xu-Lei Wang
- Molecular Medicine Research Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, People's Republic of China
- School of Life Sciences and Bioengineering, Southwest Jiaotong University, Chengdu, 610031, Sichuan, People's Republic of China
| | - Ming-ming Tong
- Molecular Medicine Research Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, People's Republic of China
| | - Lu Gan
- Molecular Medicine Research Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, People's Republic of China
| | - Huali Chen
- Molecular Medicine Research Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, People's Republic of China
| | - Si-si Wu
- Molecular Medicine Research Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, People's Republic of China
| | - Jia-Xiang Chen
- Molecular Medicine Research Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, People's Republic of China
| | - Ru-Li Li
- Molecular Medicine Research Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, People's Republic of China
| | - Yao Wu
- Molecular Medicine Research Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, People's Republic of China
| | - Heng-yu Zhang
- Department of Cardiology, West China Hospital, West China Medical School, Sichuan University, Chengdu, 610041, People's Republic of China
| | - Ye Zhu
- Department of Cardiology, West China Hospital, West China Medical School, Sichuan University, Chengdu, 610041, People's Republic of China
| | - Yan-xin Li
- Department of Laboratory Medicine, Sichuan Provincial People's Hospital, Chengdu, People's Republic of China
| | - Jin-han He
- Department of Pharmacy, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, People's Republic of China
| | - Meijing Wang
- Division of Cardiovascular and Thoracic Surgery, Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Wei Jiang
- Molecular Medicine Research Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, People's Republic of China.
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76
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Novel Perspectives in Redox Biology and Pathophysiology of Failing Myocytes: Modulation of the Intramyocardial Redox Milieu for Therapeutic Interventions-A Review Article from the Working Group of Cardiac Cell Biology, Italian Society of Cardiology. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2016; 2016:6353469. [PMID: 26881035 PMCID: PMC4736421 DOI: 10.1155/2016/6353469] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/04/2015] [Accepted: 11/16/2015] [Indexed: 12/11/2022]
Abstract
The prevalence of heart failure (HF) is still increasing worldwide, with enormous human, social, and economic costs, in spite of huge efforts in understanding pathogenetic mechanisms and in developing effective therapies that have transformed this syndrome into a chronic disease. Myocardial redox imbalance is a hallmark of this syndrome, since excessive reactive oxygen and nitrogen species can behave as signaling molecules in the pathogenesis of hypertrophy and heart failure, leading to dysregulation of cellular calcium handling, of the contractile machinery, of myocardial energetics and metabolism, and of extracellular matrix deposition. Recently, following new interesting advances in understanding myocardial ROS and RNS signaling pathways, new promising therapeutical approaches with antioxidant properties are being developed, keeping in mind that scavenging ROS and RNS tout court is detrimental as well, since these molecules also play a role in physiological myocardial homeostasis.
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77
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Boero M, Pagliaro P, Tullio F, Pellegrino RM, Palmieri A, Ferbo L, Saglio G, De Gobbi M, Penna C, Roetto A. A comparative study of myocardial molecular phenotypes of two tfr2β null mice: role in ischemia/reperfusion. Biofactors 2015; 41:360-71. [PMID: 26458496 DOI: 10.1002/biof.1237] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Accepted: 09/05/2015] [Indexed: 01/01/2023]
Abstract
Transferrin receptor 2 (Tfr2) is an iron-modulator transcribed in two isoforms, Tfr2α and Tfr2β. The latter is expressed in the heart. We obtained two mouse models with silencing of Tfr2β: one with a normal systemic iron amount (SIA), i.e., Tfr2-KI, and the other, i.e., LCKO-KI, with high SIA due to hepatic Tfr2α silencing. We aimed to assess whether Tfr2β might play a role in myocardial injury and whether Tfr2β silencing might modify proteins of iron metabolism, antioxidant, apoptotic, and survival enzyme activities in the heart undergoing ischemia/reperfusion (I/R). Isolated hearts of wild-type (WT) and Tfr2-null mice were studied before or after an I/R protocol, and proteins/RNA analyzed by Western blot and/or quantitative PCR. Tfr2β increased in WT hearts subject to I/R, and both Tfr2β null mice hearts were protected against I/R injury (about 40% smaller infarct-size compared to WT hearts). RISK kinases (ERK1/2-AKT-PKCε) were found up-regulated after I/R in Tfr2-KI, whereas SAFE enzyme (Stat3) and GSK3β resulted phosphorylated during I/R in LCKO-KI hearts. While HO-1 and HIF-2a were high in both Tfr2β-null mice, Catalase, and proapoptotic factors were upregulated only in LCKO-KI. Finally, Tfr2-KI hearts presented an increased Ferritin-H and a decreased Ferroportin1, whereas LCKO-KI hearts displayed an upregulation of Ferritin-L chain and DMT1/Hamp-RNA. In conclusion, Tfr2β isoform is involved in cardiac iron metabolism and its silencing leads to a protected phenotype (antioxidants, RISK, and/or SAFE upregulation) against I/R challenging. Iron-dependent signals involved in cardioprotection seem to be positively affected by Tfr2β downregulation and subsequent Ferritins upregulation.
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Affiliation(s)
- Martina Boero
- Department of Clinical and Biological Sciences, University of Torino, AOU San Luigi Gonzaga, Orbassano, Torino, Italy
| | - Pasquale Pagliaro
- Department of Clinical and Biological Sciences, University of Torino, AOU San Luigi Gonzaga, Orbassano, Torino, Italy
- Cardiovascular Physiology Lab (Torino), National Institute for Cardiovascular Researches (INRC), Bologna, Italy
| | - Francesca Tullio
- Department of Clinical and Biological Sciences, University of Torino, AOU San Luigi Gonzaga, Orbassano, Torino, Italy
- Cardiovascular Physiology Lab (Torino), National Institute for Cardiovascular Researches (INRC), Bologna, Italy
| | - Rosa M Pellegrino
- Department of Clinical and Biological Sciences, University of Torino, AOU San Luigi Gonzaga, Orbassano, Torino, Italy
| | - Antonietta Palmieri
- Department of Clinical and Biological Sciences, University of Torino, AOU San Luigi Gonzaga, Orbassano, Torino, Italy
| | - Ludovica Ferbo
- Department of Clinical and Biological Sciences, University of Torino, AOU San Luigi Gonzaga, Orbassano, Torino, Italy
| | - Giuseppe Saglio
- Department of Clinical and Biological Sciences, University of Torino, AOU San Luigi Gonzaga, Orbassano, Torino, Italy
| | - Marco De Gobbi
- Department of Clinical and Biological Sciences, University of Torino, AOU San Luigi Gonzaga, Orbassano, Torino, Italy
| | - Claudia Penna
- Department of Clinical and Biological Sciences, University of Torino, AOU San Luigi Gonzaga, Orbassano, Torino, Italy
- Cardiovascular Physiology Lab (Torino), National Institute for Cardiovascular Researches (INRC), Bologna, Italy
| | - Antonella Roetto
- Department of Clinical and Biological Sciences, University of Torino, AOU San Luigi Gonzaga, Orbassano, Torino, Italy
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78
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Sun Y, Xu J, Minobe E, Shimoara S, Hao L, Kameyama M. Regulation of the Cav1.2 cardiac channel by redox via modulation of CaM interaction with the channel. J Pharmacol Sci 2015; 128:137-43. [PMID: 26169579 DOI: 10.1016/j.jphs.2015.06.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Revised: 06/02/2015] [Accepted: 06/16/2015] [Indexed: 02/07/2023] Open
Abstract
Although it has been well documented that redox can modulate Cav1.2 channel activity, the underlying mechanisms are not fully understood. In our study, we examined the effects of redox on Cav1.2 channel activity and on CaM interaction with the Cav1.2 α1 subunit. Dithiothreitol (DTT, 1 mM) in the cell-attached mode decreased, while hydrogen peroxide (H2O2, 1 mM) increased channel activity to 72 and 303%, respectively. The effects of redox were maintained in the inside-out mode where channel activity was induced by CaM + ATP: DTT (1 mM) decreased, while H2O2 (1 mM) increased the channel activity. These results were mimicked by the thioredoxin and oxidized glutathione system. To test whether the redox state might determine channel activity by affecting the CaM interaction with the channel, we examined the effects of DTT and H2O2 on CaM binding to the N- and C-terminal fragments of the channel. We found that DTT concentration-dependently inhibited CaM binding to the C-terminus (IC50 37 μM), but H2O2 had no effect. Neither DTT nor H2O2 had an effect on CaM interaction with the N-terminus. These results suggest that redox-mediated regulation of the Cav1.2 channel is governed, at least partially, by modulation of the CaM interaction with the channel.
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Affiliation(s)
- Yu Sun
- Department of Pharmaceutical Toxicology, School of Pharmacy, China Medical University, Shenyang 110122, China; Department of Physiology, Graduate School of Medical and Dental Sciences, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan
| | - Jianjun Xu
- Department of Physiology, Graduate School of Medical and Dental Sciences, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan
| | - Etsuko Minobe
- Department of Physiology, Graduate School of Medical and Dental Sciences, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan
| | - Shoken Shimoara
- Department of Physiology, Graduate School of Medical and Dental Sciences, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan
| | - Liying Hao
- Department of Pharmaceutical Toxicology, School of Pharmacy, China Medical University, Shenyang 110122, China.
| | - Masaki Kameyama
- Department of Physiology, Graduate School of Medical and Dental Sciences, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan.
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79
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Crisafulli A, Mancardi D, Marongiu E, Rastaldo R, Penna C, Pagliaro P. Preconditioning cardioprotection and exercise performance: a radical point of view. SPORT SCIENCES FOR HEALTH 2015. [DOI: 10.1007/s11332-015-0225-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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80
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Thymoquinone Protects against Myocardial Ischemic Injury by Mitigating Oxidative Stress and Inflammation. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2015; 2015:143629. [PMID: 26101531 PMCID: PMC4458551 DOI: 10.1155/2015/143629] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/05/2014] [Accepted: 02/21/2015] [Indexed: 02/01/2023]
Abstract
The present study was aimed at investigating the cardioprotective activity of thymoquinone (TMQ), an active principle of the herb, Nigella sativa, which is used for the management of various diseases. The present study examined the cardioprotective effect of TMQ in isoproterenol- (ISP-) induced myocardial infarction in rats. Myocardial infarction was induced by two subcutaneous injections of ISP (85 mg/kg) at an interval of 24 hr. TMQ (20 mg/kg) was administered orally for 21 days. ISP-treated rats showed depletion of antioxidants and marker enzymes from myocardium along with lipid peroxidation and enhanced levels of proinflammatory cytokines. ISP also induced histopathological alterations in myocardium. Treatment with TMQ prevented the depletion of endogenous antioxidants and myocyte injury marker enzymes and inhibited lipid peroxidation as well as reducing the levels of proinflammatory cytokines. TMQ pretreatment also reduced myonecrosis, edema, and infiltration of inflammatory cells and showed preservation of cardiomyocytes histoarchitecture. The present study results demonstrate that TMQ exerts cardioprotective effect by mitigating oxidative stress, augmenting endogenous antioxidants, and maintaining structural integrity. The results of the present study indicate that TMQ may serve as an excellent agent alone or as adjuvant to prevent the onset and progression of myocardial injury.
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81
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Zhang YS, Liu B, Luo XJ, Li TB, Zhang JJ, Peng JJ, Zhang XJ, Ma QL, Hu CP, Li YJ, Peng J, Li Q. Nuclear cardiac myosin light chain 2 modulates NADPH oxidase 2 expression in myocardium: a novel function beyond muscle contraction. Basic Res Cardiol 2015; 110:38. [PMID: 25982880 DOI: 10.1007/s00395-015-0494-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Revised: 05/02/2015] [Accepted: 05/08/2015] [Indexed: 12/21/2022]
Abstract
Recent studies demonstrated that NADPH oxidase 2 (NOX2) expression in myocardium after ischemia-reperfusion (IR) is significantly upregulated. However, the underlying mechanisms remain unknown. This study aims to determine if nuclear cardiac myosin light chain 2 (MYL2), a well-known regulatory subunit of myosin, functions as a transcription factor to promote NOX2 expression following myocardial IR in a phosphorylation-dependent manner. We examined the phosphorylation status of nuclear MYL2 (p-MYL2) in a rat model of myocardial IR (left main coronary artery subjected to 1 h ligation and 3 h reperfusion) injury, which showed IR injury and upregulated NOX2 expression as expected, accompanied by elevated H₂O₂ and nuclear p-MYL2 levels; these effects were attenuated by inhibition of myosin light chain kinase (MLCK). Next, we explored the functional relationship of nuclear p-MYL2 with NOX2 expression in H9c2 cell model of hypoxia-reoxygenation (HR) injury. In agreement with our in vivo findings, HR treatment increased apoptosis, NOX2 expression, nuclear p-MYL2 and H₂O₂ levels, and the increases were ameliorated by inhibition of MLCK or knockdown of MYL2. Finally, molecular biology techniques including co-immunoprecipitation (Co-IP), chromatin immunoprecipitation (ChIP), DNA pull-down and luciferase reporter gene assay were utilized to decipher the molecular mechanisms. We found that nuclear p-MYL2 binds to the consensus sequence AGCTCC in NOX2 gene promoter, interacts with RNA polymerase II and transcription factor IIB to form a transcription preinitiation complex, and thus activates NOX2 gene transcription. Our results demonstrate that nuclear MYL2 plays an important role in IR injury by transcriptionally upregulating NOX2 expression to enhance oxidative stress in a phosphorylation-dependent manner.
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Affiliation(s)
- Yi-Shuai Zhang
- Department of Pharmacology, School of Pharmaceutical Sciences, Central South University, Changsha, 410078, China
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82
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Koentges C, Pfeil K, Schnick T, Wiese S, Dahlbock R, Cimolai MC, Meyer-Steenbuck M, Cenkerova K, Hoffmann MM, Jaeger C, Odening KE, Kammerer B, Hein L, Bode C, Bugger H. SIRT3 deficiency impairs mitochondrial and contractile function in the heart. Basic Res Cardiol 2015; 110:36. [PMID: 25962702 DOI: 10.1007/s00395-015-0493-6] [Citation(s) in RCA: 144] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Revised: 04/22/2015] [Accepted: 05/06/2015] [Indexed: 12/19/2022]
Abstract
Sirtuin 3 (SIRT3) is a mitochondrial NAD(+)-dependent deacetylase that regulates energy metabolic enzymes by reversible protein lysine acetylation in various extracardiac tissues. The role of SIRT3 in myocardial energetics and in the development of mitochondrial dysfunction in cardiac pathologies, such as the failing heart, remains to be elucidated. To investigate the role of SIRT3 in the regulation of myocardial energetics and function SIRT3(-/-) mice developed progressive age-related deterioration of cardiac function, as evidenced by a decrease in ejection fraction and an increase in enddiastolic volume at 24 but not 8 weeks of age using echocardiography. Four weeks following transverse aortic constriction, ejection fraction was further decreased in SIRT3(-/-) mice compared to WT mice, accompanied by a greater degree of cardiac hypertrophy and fibrosis. In isolated working hearts, a decrease in cardiac function in SIRT3(-/-) mice was accompanied by a decrease in palmitate oxidation, glucose oxidation, and oxygen consumption, whereas rates of glycolysis were increased. Respiratory capacity and ATP synthesis were decreased in cardiac mitochondria of SIRT3(-/-) mice. HPLC measurements revealed a decrease of the myocardial ATP/AMP ratio and of myocardial energy charge. Using LC-MS/MS, we identified increased acetylation of 84 mitochondrial proteins, including 6 enzymes of fatty acid import and oxidation, 50 subunits of the electron transport chain, and 3 enzymes of the tricarboxylic acid cycle. Lack of SIRT3 impairs mitochondrial and contractile function in the heart, likely due to increased acetylation of various energy metabolic proteins and subsequent myocardial energy depletion.
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Affiliation(s)
- Christoph Koentges
- Division of Cardiology and Angiology I, Heart Center Freiburg University, Hugstetter Str. 55, 79106, Freiburg, Germany
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83
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Lei H, Wu D, Wang JY, Li L, Zhang CL, Feng H, Fu FY, Wu LL. C1q/tumor necrosis factor-related protein-6 attenuates post-infarct cardiac fibrosis by targeting RhoA/MRTF-A pathway and inhibiting myofibroblast differentiation. Basic Res Cardiol 2015; 110:35. [PMID: 25962701 DOI: 10.1007/s00395-015-0492-7] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2015] [Accepted: 05/04/2015] [Indexed: 12/18/2022]
Abstract
C1q/tumor necrosis factor-related protein-6 (CTRP6) is a newly identified adiponectin paralog with modulation effects on metabolism and inflammation. However, the cardiovascular function of CTRP6 remains unknown. This study aimed to determine its role in cardiac fibrosis and explore the possible mechanism. Myocardial infarction (MI) was induced by left anterior descending coronary artery ligation in rats. CTRP6 was mainly expressed in the cytoplasm of adult rat cardiomyocytes and significantly decreased in the border and infarct zones post-MI. Adenovirus-mediated CTRP6 delivery improved cardiac function, attenuated cardiac hypertrophy, alleviated cardiac fibrosis, and inhibited myofibroblast differentiation as well as the expression of collagen I, collagen III, and connective tissue growth factor post-MI. In cultured adult rat cardiac fibroblasts (CFs), exogenous or cardiomyocyte-secreted CTRP6 inhibited, whereas knockdown of CTRP6 facilitated transforming growth factor-β1 (TGF-β1)-induced expression of α-smooth muscle actin, smooth muscle 22α, and profibrotic molecules. CTRP6 had no effect on CFs proliferation but attenuated CFs migration induced by TGF-β1. CTRP6 increased the phosphorylation of AMP-activated protein kinase (AMPK) and Akt in CFs and post-MI hearts. Pretreatment with adenine 9-β-D-arabinofuranoside (AraA), an AMPK inhibitor, or LY294002, a phosphatidylinositol-3-kinase (PI3 K) inhibitor, abolished the protective effect of CTRP6 on TGF-β1-induced profibrotic response. Furthermore, CTRP6 had no effect on TGF-β1-induced Smad3 phosphorylation and nuclear translocation, whereas significantly decreased TGF-β1-induced RhoA activation and myocardin-related transcription factor-A (MRTF-A) nuclear translocation, and these effects were blocked by AMPK or Akt inhibition. In conclusion, CTRP6 attenuates cardiac fibrosis via inhibiting myofibroblast differentiation. AMPK and Akt activation are responsible for the CTRP6-mediated anti-fibrotic effect by targeting RhoA/MRTF-A pathway.
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Affiliation(s)
- Hong Lei
- Department of Physiology and Pathophysiology, Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, and Beijing Key Laboratory of Cardiovascular Receptors Research, Peking University Health Science Center, 38 Xueyuan Road, Haidian District, Beijing, 100191, China
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84
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Victorino VJ, Mencalha AL, Panis C. Post-translational modifications disclose a dual role for redox stress in cardiovascular pathophysiology. Life Sci 2015; 129:42-7. [DOI: 10.1016/j.lfs.2014.11.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Revised: 11/03/2014] [Accepted: 11/11/2014] [Indexed: 02/07/2023]
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85
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Lu K, Wang L, Wang C, Yang Y, Hu D, Ding R. Effects of high-intensity interval versus continuous moderate-intensity aerobic exercise on apoptosis, oxidative stress and metabolism of the infarcted myocardium in a rat model. Mol Med Rep 2015; 12:2374-82. [PMID: 25936391 DOI: 10.3892/mmr.2015.3669] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Accepted: 03/10/2015] [Indexed: 11/06/2022] Open
Abstract
The optimal aerobic exercise training (AET) protocol for patients following myocardial infarction (MI) has remained under debate. The present study therefore aimed to compare the effects of continuous moderate-intensity training (CMT) and high-intensity interval training (HIT) on cardiac functional recovery, and to investigate the potential associated mechanisms in a post-MI rat model. Female Sprague Dawley rats (8-10 weeks old) undergoing MI or sham surgery were subsequently submitted to CMT or HIT, or kept sedentary for eight weeks. Prior to and following AET, echocardiographic parameters and exercise capacity of the rats were measured. Western blotting was used to evaluate the levels of apoptosis and associated signaling pathway protein expression. The concentrations of biomarkers of oxidative stress were also determined by ELISA assay. Messenger (m)RNA levels and activity of the key enzymes for glycolysis and fatty acid oxidation, as well as the rate of adenosine triphosphate (ATP) synthesis, were also measured. Compared with the MI group, exercise capacity and cardiac function were significantly improved following AET, particularly following HIT. Left ventricular ejection fraction and fraction shortening were further improved in the MI-HIT group in comparison to that of the MI-CMT group. The two forms of AET almost equally attenuated apoptosis of the post-infarction myocardium. CMT and HIT also alleviated oxidative stress by decreasing the concentration of malondialdehyde and increasing the concentration of superoxide dismutase and glutathione peroxidase (GPx). In particular, HIT induced a greater increase in the concentration of GPx than that of CMT. AET, and HIT in particular, significantly increased the levels of mRNA and the maximal activity of phosphofructokinase-1 and carnitine palmitoyl transferase-1, as well as the maximal ratio of ATP synthesis. In addition, compared with the MI group, the expression of signaling proteins PI3K, Akt, p38mapk and AMPK was significantly altered in the MI-CMT and MI-HIT groups. HIT was superior to CMT in its ability to improve cardiac function and exercise capability in a post-MI rat model. HIT was also superior to CMT with regard to attenuating oxidative stress and improving glucolipid metabolism of the post-MI myocardium.
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Affiliation(s)
- Kai Lu
- Heart Center, Peking University People's Hospital, Beijing 100044, P.R. China
| | - Li Wang
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Changying Wang
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Yuan Yang
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Dayi Hu
- Heart Center, Peking University People's Hospital, Beijing 100044, P.R. China
| | - Rongjing Ding
- Heart Center, Peking University People's Hospital, Beijing 100044, P.R. China
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Abstract
Reperfusion is mandatory to salvage ischemic myocardium from infarction, but reperfusion per se contributes to injury and ultimate infarct size. Therefore, cardioprotection beyond that by timely reperfusion is needed to reduce infarct size and improve the prognosis of patients with acute myocardial infarction. The conditioning phenomena provide such cardioprotection, insofar as brief episodes of coronary occlusion/reperfusion preceding (ischemic preconditioning) or following (ischemic postconditioning) sustained myocardial ischemia with reperfusion reduce infarct size. Even ischemia/reperfusion in organs remote from the heart provides cardioprotection (remote ischemic conditioning). The present review characterizes the signal transduction underlying the conditioning phenomena, including their physical and chemical triggers, intracellular signal transduction, and effector mechanisms, notably in the mitochondria. Cardioprotective signal transduction appears as a highly concerted spatiotemporal program. Although the translation of ischemic postconditioning and remote ischemic conditioning protocols to patients with acute myocardial infarction has been fairly successful, the pharmacological recruitment of cardioprotective signaling has been largely disappointing to date.
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Affiliation(s)
- Gerd Heusch
- From the Institute for Pathophysiology, West German Heart and Vascular Centre, University of Essen Medical School, Essen, Germany.
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87
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Transient receptor potential melastatin-4 is involved in hypoxia-reoxygenation injury in the cardiomyocytes. PLoS One 2015; 10:e0121703. [PMID: 25836769 PMCID: PMC4383534 DOI: 10.1371/journal.pone.0121703] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2014] [Accepted: 02/18/2015] [Indexed: 12/22/2022] Open
Abstract
Ischemic heart disease still remains the most common cause of cardiac death. During ischemia-reperfusion (I/R), reactive oxygen species (ROS) are produced in excess in cardiac tissue, where they induce cell death. Our previous study showed that 9-phenanthrol (9-Phe), a specific inhibitor of the TRPM4 channel, preserves cardiac contractile function and protects the heart from I/R injury-related infarction in the excised rat heart. Accordingly, we hypothesized that TRPM4 channels are involved in the 9-Phe-mediated cardioprotection against ROS-induced injury. In rats, intravenous 9-Phe mitigated the development of myocardial infarction caused by the occlusion of the left anterior descending artery. Immunohistochemical analysis indicated that TRPM4 proteins are expressed in ventricular myocytes susceptible to I/R injury. Hydrogen peroxide (H2O2) is among the main ROS overproduced during I/R. In the cardiomyocyte cell line H9c2, pretreatment with 9-Phe prevented cell death induced by conditions mimicking I/R, namely 200 μM H2O2 and hypoxia-reoxygenation. Gene silencing of TRPM4 preserved the viability of H9c2 cardiomyocytes exposed to 200 μM H2O2. These results suggest that the cardioprotective effects of 9-Phe are mediated through the inhibition of the TRPM4 channels.
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Abstract
PURPOSE OF REVIEW Vitamin C is not only an essential nutrient involved in many anabolic pathways, but also an important player of the endogenous antioxidant defense. Low plasma levels are very common in critical care patients and may reflect severe deficiency states. RECENT FINDINGS Vitamin C scavenges reactive oxygen species such as superoxide and peroxynitrite in plasma and cells (preventing damage to proteins, lipids and DNA), prevents occludin dephosphorylation and loosening of the tight junctions. Ascorbate improves microcirculatory flow impairment by inhibiting tumor-necrosis-factor-induced intracellular adhesion molecule expression, which triggers leukocyte stickiness and slugging. Clinical trials in sepsis, trauma and major burns testing high-dose vitamin C show clinical benefit. Restoration of normal plasma levels in inflammatory patients requires the administration of 3 g/day for several days, which is 30 times the daily recommended dose. SUMMARY The recent research on the modulation of oxidative stress and endothelial protection offer interesting therapeutic perspectives, based on the biochemical evidence, with limited or even absent side-effects.
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Affiliation(s)
- Mette M Berger
- aAdult Intensive Care and Burns, University Hospital CHUV, Lausanne, Switzerland bDepartment of Intensive Care, VU University Medical Center, Amsterdam, the Netherlands
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89
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Direct effects of (-)-epicatechin and procyanidin B2 on the respiration of rat heart mitochondria. BIOMED RESEARCH INTERNATIONAL 2015; 2015:232836. [PMID: 25811024 PMCID: PMC4354975 DOI: 10.1155/2015/232836] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/27/2014] [Accepted: 02/03/2015] [Indexed: 12/31/2022]
Abstract
Flavonol (−)-epicatechin and its derived dimer procyanidin B2, present in high amounts in cocoa products, have been shown to exert beneficial effects on the heart and cardiovascular system; however, their mechanism of action has not been fully elucidated. We studied effects of (−)-epicatechin and procyanidin B2 on the oxidative phosphorylation of isolated rat heart mitochondria. (−)-Epicatechin and procyanidin B2 had stimulating effect (up to 30% compared to control) on substrate-driven (State 2) mitochondrial respiration. Their effect was dependent on the respiratory substrates used. (−)-Epicatechin at higher concentrations (from 0.27 µg/mL) significantly decreased (up to 15%) substrate- and ADP-driven (State 3) mitochondrial respiration in case of pyruvate and malate oxidation only. Procyanidin B2 (0.7–17.9 ng/mL) inhibited State 3 respiration rate up to 19%, the most profound effect being expressed with succinate as the substrate. (−)-Epicatechin at concentrations of 0.23 µg/mL and 0.46 µg/mL prevented loss of the cytochrome c from mitochondria when substrate was succinate, supporting the evidence of membrane stabilizing properties of this flavonol. Thus, both (−)-epicatechin and procyanidin B2 directly influenced mitochondrial functions and the observed effects could help to explain cardiometabolic risk reduction ascribed to the consumption of modest amounts of cocoa products.
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90
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Baysa A, Sagave J, Carpi A, Zaglia T, Campesan M, Dahl CP, Bilbija D, Troitskaya M, Gullestad L, Giorgio M, Mongillo M, Di Lisa F, Vaage JI, Valen G. The p66ShcA adaptor protein regulates healing after myocardial infarction. Basic Res Cardiol 2015; 110:13. [DOI: 10.1007/s00395-015-0470-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2014] [Revised: 02/04/2015] [Accepted: 02/06/2015] [Indexed: 10/24/2022]
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91
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Zitta K, Meybohm P, Gruenewald M, Cremer J, Zacharowski KD, Scholz J, Steinfath M, Albrecht M. Profiling of cell stress protein expression in cardiac tissue of cardiosurgical patients undergoing remote ischemic preconditioning: implications for thioredoxin in cardioprotection. J Transl Med 2015; 13:34. [PMID: 25622749 PMCID: PMC4316390 DOI: 10.1186/s12967-015-0403-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Accepted: 01/16/2015] [Indexed: 01/26/2023] Open
Abstract
Background Transient episodes of ischemia in a remote organ (remote ischemic preconditioning, RIPC) can attenuate myocardial ischemia/reperfusion injury but the underlying mechanisms of RIPC in the target organ are still poorly understood. Recent animal studies suggested that the small redox protein thioredoxin may be a potential candidate for preconditioning-induced organprotection. Here we employed a human proteome profiler array to investigate the RIPC regulated expression of cell stress proteins and particularly of thioredoxin in heart tissue of cardiosurgical patients with cardiopulmonary bypass (CPB). Methods RIPC was induced by four 5 minute cycles of transient upper limb ischemia/reperfusion using a blood pressure cuff. Right atrial tissue was obtained from patients receiving RIPC (N = 19) and control patients (N = 19) before and after CPB. Cell stress proteome profiler arrays as well as Westernblotting and ELISA experiments for thioredoxin (Thio-1) were performed employing the respective tissue samples. Results Protein arrays revealed an up-regulation of 26.9% (7/26; CA IX, Cyt C, HSP-60, HSP-70, pJNK, SOD2, Thio-1) of cell stress associated proteins in RIPC tissue obtained before CPB, while 3.8% (1/26; SIRT2) of the proteins were down-regulated. Array results for thioredoxin were verified by semi-quantitative Westernblotting studies which showed a significant up-regulation of thioredoxin protein levels in cardiac tissue samples of RIPC patients taken before CPB (RIPC: 5.36 ± 0.85 a.u.; control: 3.23 ± 0.39 a.u.; P < 0.05). Quantification of thioredoxin levels in tissue of RIPC and control patients by ELISA experiments further confirmed the Westernblotting results (RIPC: 0.30 ± 0.02 ng/mg protein; control: 0.24 ± 0.02 ng/mg protein; P < 0.05). Conclusion We provide evidence for thioredoxin as a RIPC-induced factor in heart tissue of cardiosurgical patients and identified several cell stress associated proteins that are regulated by RIPC and may play a role in RIPC-mediated cardioprotection. Electronic supplementary material The online version of this article (doi:10.1186/s12967-015-0403-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Karina Zitta
- Department of Anaesthesiology and Intensive Care Medicine, University Hospital Schleswig-Holstein, Schwanenweg 21, 24105, Kiel, Germany.
| | - Patrick Meybohm
- Department of Anaesthesiology and Intensive Care Medicine, University Hospital Schleswig-Holstein, Schwanenweg 21, 24105, Kiel, Germany. .,Department of Anaesthesiology, Intensive Care Medicine and Pain Therapy, University Hospital Frankfurt, Frankfurt am Main, Germany.
| | - Matthias Gruenewald
- Department of Anaesthesiology and Intensive Care Medicine, University Hospital Schleswig-Holstein, Schwanenweg 21, 24105, Kiel, Germany.
| | - Jochen Cremer
- Department of Cardiovascular Surgery, University Hospital Schleswig-Holstein, Kiel, Germany.
| | - Kai D Zacharowski
- Department of Anaesthesiology, Intensive Care Medicine and Pain Therapy, University Hospital Frankfurt, Frankfurt am Main, Germany.
| | - Jens Scholz
- Department of Anaesthesiology and Intensive Care Medicine, University Hospital Schleswig-Holstein, Schwanenweg 21, 24105, Kiel, Germany.
| | - Markus Steinfath
- Department of Anaesthesiology and Intensive Care Medicine, University Hospital Schleswig-Holstein, Schwanenweg 21, 24105, Kiel, Germany.
| | - Martin Albrecht
- Department of Anaesthesiology and Intensive Care Medicine, University Hospital Schleswig-Holstein, Schwanenweg 21, 24105, Kiel, Germany.
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92
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Pagliaro P, Penna C. Redox signalling and cardioprotection: translatability and mechanism. Br J Pharmacol 2015; 172:1974-95. [PMID: 25303224 DOI: 10.1111/bph.12975] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Revised: 09/24/2014] [Accepted: 09/30/2014] [Indexed: 12/13/2022] Open
Abstract
The morbidity and mortality from coronary artery disease (CAD) remain significant worldwide. The treatment for acute myocardial infarction has improved over the past decades, including early reperfusion of culprit coronary arteries. Although it is mandatory to reperfuse the ischaemic territory as soon as possible, paradoxically this leads to additional myocardial injury, namely ischaemia/reperfusion (I/R) injury, in which redox stress plays a pivotal role and for which no effective therapy is currently available. In this review, we report evidence that the redox environment plays a pivotal role not only in I/R injury but also in cardioprotection. In fact, cardioprotective strategies, such as pre- and post-conditioning, result in a robust reduction in infarct size in animals and the role of redox signalling is of paramount importance in these conditioning strategies. Nitrosative signalling and cysteine redox modifications, such as S-nitrosation/S-nitrosylation, are also emerging as very important mechanisms in conditioning cardioprotection. The reasons for the switch from protective oxidative/nitrosative signalling to deleterious oxidative/nitrosative/nitrative stress are not fully understood. The complex regulation of this switch is, at least in part, responsible for the diminished or lack of cardioprotection induced by conditioning protocols observed in ageing animals and with co-morbidities as well as in humans. Therefore, it is important to understand at a mechanistic level the reasons for these differences before proposing a safe and useful transition of ischaemic or pharmacological conditioning. Indeed, more mechanistic novel therapeutic strategies are required to protect the heart from I/R injury and to improve clinical outcomes in patients with CAD.
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Affiliation(s)
- P Pagliaro
- Department of Clinical and Biological Sciences, University of Torino, 10043, Orbassano, Turin, Italy
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93
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Farah C, Reboul C. NO Better Way to Protect the Heart during Ischemia-Reperfusion: To be in the Right Place at the Right Time. Front Pediatr 2015; 3:6. [PMID: 25705614 PMCID: PMC4319379 DOI: 10.3389/fped.2015.00006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2015] [Accepted: 01/26/2015] [Indexed: 11/24/2022] Open
Affiliation(s)
- Charlotte Farah
- EA4278, LaPEC, Université d'Avignon , Avignon , France ; UMR-CNRS 9214, INSERM U1046, Université de Montpellier , Montpellier , France
| | - Cyril Reboul
- EA4278, LaPEC, Université d'Avignon , Avignon , France
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Wang Z, Wang Y, Ye J, Lu X, Cheng Y, Xiang L, Chen L, Feng W, Shi H, Yu X, Lin L, Zhang H, Xiao J, Li X. bFGF attenuates endoplasmic reticulum stress and mitochondrial injury on myocardial ischaemia/reperfusion via activation of PI3K/Akt/ERK1/2 pathway. J Cell Mol Med 2014; 19:595-607. [PMID: 25533999 PMCID: PMC4369816 DOI: 10.1111/jcmm.12346] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2014] [Accepted: 05/14/2014] [Indexed: 12/11/2022] Open
Abstract
Extensive research focused on finding effective strategies to prevent or improve recovery from myocardial ischaemia/reperfusion (I/R) injury. Basic fibroblast growth factor (bFGF) has been shown to have therapeutic potential in some heart disorders, including ischaemic injury. In this study, we demonstrate that bFGF administration can inhibit the endoplasmic reticulum (ER) stress and mitochondrial dysfunction induced in the heart in a mouse model of I/R injury. In vitro, bFGF exerts a protective effect by inhibiting the ER stress response and mitochondrial dysfunction proteins that are induced by tert-Butyl hydroperoxide (TBHP) treatment. Both of these in vivo and in vitro effects are related to the activation of two downstream signalling pathways, PI3K/Akt and ERK1/2. Inhibition of these PI3K/Akt and ERK1/2 pathways by specific inhibitors, LY294002 and PD98059, partially reduces the protective effect of bFGF. Taken together, our results indicate that the cardioprotective role of bFGF involves the suppression of ER stress and mitochondrial dysfunction in ischaemic oxidative damage models and oxidative stress-induced H9C2 cell injury; furthermore, these effects underlie the activation of the PI3K/Akt and ERK1/2 signalling pathways.
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Affiliation(s)
- Zhouguang Wang
- Department of Biochemistry and Molecular Biology, College of Basic Medical Science, Jilin University, Changchun, China; School of Pharmacy, Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University, Wenzhou, Zhejiang, China
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95
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Kleinbongard P, Heusch G. Extracellular signalling molecules in the ischaemic/reperfused heart - druggable and translatable for cardioprotection? Br J Pharmacol 2014; 172:2010-25. [PMID: 25204973 DOI: 10.1111/bph.12902] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2014] [Revised: 08/21/2014] [Accepted: 08/29/2014] [Indexed: 12/28/2022] Open
Abstract
In patients with acute myocardial infarction, timely reperfusion is essential to limit infarct size. However, reperfusion also adds to myocardial injury. Brief episodes of ischaemia/reperfusion in the myocardium or on organ remote from the heart, before or shortly after sustained myocardial ischaemia effectively reduce infarct size, provided there is eventual reperfusion. Such conditioning phenomena have been established in many experimental studies and also translated to humans. The underlying signal transduction, that is the molecular identity of triggers, mediators and effectors, is not clear yet in detail, but several extracellular signalling molecules, such as adenosine, bradykinin and opioids, have been identified to contribute to cardioprotection by conditioning manoeuvres. Several trials have attempted the translation of cardioprotection by such autacoids into a clinical scenario of myocardial ischaemia and reperfusion. Adenosine and its selective agonists reduced infarct size in a few studies, but this benefit was not translated into improved clinical outcome. All studies with bradykinin or drugs which increase bradykinin's bioavailability reported reduced infarct size and some of them also improved clinical outcome. Synthetic opioid agonists did not result in a robust infarct size reduction, but this failure of translation may relate to the cardioprotective properties of the underlying anaesthesia per se or of the comparator drugs. The translation of findings in healthy, young animals with acute coronary occlusion/reperfusion to patients of older age, with a variety of co-morbidities and co-medications, suffering from different scenarios of myocardial ischaemia/reperfusion remains a challenge.
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Affiliation(s)
- P Kleinbongard
- Institute for Pathophysiology, West German Heart and Vascular Center, University School of Medicine Essen, Essen, Germany
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96
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Nabben M, van Bree BWJ, Lenaers E, Hoeks J, Hesselink MKC, Schaart G, Gijbels MJJ, Glatz JFC, da Silva GJJ, de Windt LJ, Tian R, Mike E, Skapura DG, Wehrens XHT, Schrauwen P. Lack of UCP3 does not affect skeletal muscle mitochondrial function under lipid-challenged conditions, but leads to sudden cardiac death. Basic Res Cardiol 2014; 109:447. [PMID: 25344084 DOI: 10.1007/s00395-014-0447-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Revised: 10/07/2014] [Accepted: 10/15/2014] [Indexed: 12/29/2022]
Abstract
UCP3's exact physiological function in lipid handling in skeletal and cardiac muscle remains unknown. Interestingly, etomoxir, a fat oxidation inhibitor and strong inducer of UCP3, is proposed for treating both diabetes and heart failure. We hypothesize that the upregulation of UCP3 upon etomoxir serves to protect mitochondria against lipotoxicity. To evaluate UCP3's role in skeletal muscle (skm) and heart under lipid-challenged conditions, the effect of UCP3 ablation was examined in a state of dysbalance between fat availability and oxidative capacity. Wild type (WT) and UCP3(-/-) mice were subjected to high-fat feeding for 14 days. From day 6 onwards, they were given either saline or etomoxir. Etomoxir treatment induced an increase in markers of lipotoxicity in skm compared to saline. This increase upon etomoxir was similar for both, WT and UCP3(-/-) mice, suggesting that UCP3 does not play a role in protection against lipotoxicity. Interestingly, we observed 25 % mortality in UCP3(-/-)s upon etomoxir administration vs. 11 % in WTs. This increased mortality in UCP3(-/-) compared to WT mice could not be explained by differences in cardiac lipotoxicity, apoptosis, fibrosis (histology, immunohistochemistry), oxidative capacity (respirometry) or function (echocardiography). Electrophysiology demonstrated, however, prolonged QRS and QTc intervals and greater susceptibility to ventricular tachycardia upon programmed electrical stimulation in etomoxir-treated UCP3(-/-)s versus WTs. Isoproterenol administration after pacing resulted in 75 % mortality in UCP3(-/-)s vs. 14 % in WTs. Our results argue against a protective role for UCP3 on skm metabolism under lipid overload, but suggest UCP3 to be crucial in prevention of arrhythmias upon lipid-challenged conditions.
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Affiliation(s)
- Miranda Nabben
- Department of Human Biology, NUTRIM School for Nutrition, Toxicology and Metabolism, Maastricht University Medical Centre, PO Box 616, 6200 MD Maastricht, The Netherlands
| | - Bianca W J van Bree
- Department of Human Biology, NUTRIM School for Nutrition, Toxicology and Metabolism, Maastricht University Medical Centre, PO Box 616, 6200 MD Maastricht, The Netherlands
| | - Ellen Lenaers
- Department of Human Movement Sciences, NUTRIM School for Nutrition, Toxicology and Metabolism, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Joris Hoeks
- Department of Human Biology, NUTRIM School for Nutrition, Toxicology and Metabolism, Maastricht University Medical Centre, PO Box 616, 6200 MD Maastricht, The Netherlands
| | - Matthijs K C Hesselink
- Department of Human Movement Sciences, NUTRIM School for Nutrition, Toxicology and Metabolism, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Gert Schaart
- Department of Human Movement Sciences, NUTRIM School for Nutrition, Toxicology and Metabolism, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Marion J J Gijbels
- Department of Molecular Genetics, CARIM School for Cardiovascular Research, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Jan F C Glatz
- Department of Molecular Genetics, CARIM School for Cardiovascular Research, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Gustavo J J da Silva
- Department of Cardiology, CARIM School for Cardiovascular Research, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Leon J de Windt
- Department of Cardiology, CARIM School for Cardiovascular Research, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Rong Tian
- Department of Anesthesiology and Pain Medicine, Mitochondria and Metabolism Center, University of Washington, Seattle, WA, USA
| | - Elise Mike
- Department of Molecular Physiology and Biophysics and Medicine (Cardiology), Cardiovascular Research Institute, Baylor College of Medicine, Houston, TX, USA
| | - Darlene G Skapura
- Department of Molecular Physiology and Biophysics and Medicine (Cardiology), Cardiovascular Research Institute, Baylor College of Medicine, Houston, TX, USA
| | - Xander H T Wehrens
- Department of Molecular Physiology and Biophysics and Medicine (Cardiology), Cardiovascular Research Institute, Baylor College of Medicine, Houston, TX, USA
| | - Patrick Schrauwen
- Department of Human Biology, NUTRIM School for Nutrition, Toxicology and Metabolism, Maastricht University Medical Centre, PO Box 616, 6200 MD Maastricht, The Netherlands
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97
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Alleman RJ, Katunga LA, Nelson MAM, Brown DA, Anderson EJ. The "Goldilocks Zone" from a redox perspective-Adaptive vs. deleterious responses to oxidative stress in striated muscle. Front Physiol 2014; 5:358. [PMID: 25278906 PMCID: PMC4166897 DOI: 10.3389/fphys.2014.00358] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Accepted: 09/02/2014] [Indexed: 01/17/2023] Open
Abstract
Consequences of oxidative stress may be beneficial or detrimental in physiological systems. An organ system's position on the “hormetic curve” is governed by the source and temporality of reactive oxygen species (ROS) production, proximity of ROS to moieties most susceptible to damage, and the capacity of the endogenous cellular ROS scavenging mechanisms. Most importantly, the resilience of the tissue (the capacity to recover from damage) is a decisive factor, and this is reflected in the disparate response to ROS in cardiac and skeletal muscle. In myocytes, a high oxidative capacity invariably results in a significant ROS burden which in homeostasis, is rapidly neutralized by the robust antioxidant network. The up-regulation of key pathways in the antioxidant network is a central component of the hormetic response to ROS. Despite such adaptations, persistent oxidative stress over an extended time-frame (e.g., months to years) inevitably leads to cumulative damages, maladaptation and ultimately the pathogenesis of chronic diseases. Indeed, persistent oxidative stress in heart and skeletal muscle has been repeatedly demonstrated to have causal roles in the etiology of heart disease and insulin resistance, respectively. Deciphering the mechanisms that underlie the divergence between adaptive and maladaptive responses to oxidative stress remains an active area of research for basic scientists and clinicians alike, as this would undoubtedly lead to novel therapeutic approaches. Here, we provide an overview of major types of ROS in striated muscle and the divergent adaptations that occur in response to them. Emphasis is placed on highlighting newly uncovered areas of research on this topic, with particular focus on the mitochondria, and the diverging roles that ROS play in muscle health (e.g., exercise or preconditioning) and disease (e.g., cardiomyopathy, ischemia, metabolic syndrome).
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Affiliation(s)
- Rick J Alleman
- Departments of Physiology, East Carolina University Greenville, NC, USA ; East Carolina Diabetes and Obesity Institute, East Carolina University Greenville, NC, USA
| | - Lalage A Katunga
- East Carolina Diabetes and Obesity Institute, East Carolina University Greenville, NC, USA ; Pharmacology and Toxicology, Brody School of Medicine, East Carolina University Greenville, NC, USA
| | - Margaret A M Nelson
- East Carolina Diabetes and Obesity Institute, East Carolina University Greenville, NC, USA ; Pharmacology and Toxicology, Brody School of Medicine, East Carolina University Greenville, NC, USA
| | - David A Brown
- Departments of Physiology, East Carolina University Greenville, NC, USA ; East Carolina Diabetes and Obesity Institute, East Carolina University Greenville, NC, USA
| | - Ethan J Anderson
- East Carolina Diabetes and Obesity Institute, East Carolina University Greenville, NC, USA ; Pharmacology and Toxicology, Brody School of Medicine, East Carolina University Greenville, NC, USA
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98
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Agarwal B, Stowe DF, Dash RK, Bosnjak ZJ, Camara AKS. Mitochondrial targets for volatile anesthetics against cardiac ischemia-reperfusion injury. Front Physiol 2014; 5:341. [PMID: 25278902 PMCID: PMC4165278 DOI: 10.3389/fphys.2014.00341] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Accepted: 08/20/2014] [Indexed: 12/15/2022] Open
Abstract
Mitochondria are critical modulators of cell function and are increasingly recognized as proximal sensors and effectors that ultimately determine the balance between cell survival and cell death. Volatile anesthetics (VA) are long known for their cardioprotective effects, as demonstrated by improved mitochondrial and cellular functions, and by reduced necrotic and apoptotic cell death during cardiac ischemia and reperfusion (IR) injury. The molecular mechanisms by which VA impart cardioprotection are still poorly understood. Because of the emerging role of mitochondria as therapeutic targets in diseases, including ischemic heart disease, it is important to know if VA-induced cytoprotective mechanisms are mediated at the mitochondrial level. In recent years, considerable evidence points to direct effects of VA on mitochondrial channel/transporter protein functions and electron transport chain (ETC) complexes as potential targets in mediating cardioprotection. This review furnishes an integrated overview of targets that VA impart on mitochondrial channels/transporters and ETC proteins that could provide a basis for cation regulation and homeostasis, mitochondrial bioenergetics, and reactive oxygen species (ROS) emission in redox signaling for cardiac cell protection during IR injury.
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Affiliation(s)
- Bhawana Agarwal
- Department of Anesthesiology, Medical College of WisconsinMilwaukee, WI, USA
| | - David F. Stowe
- Department of Anesthesiology, Medical College of WisconsinMilwaukee, WI, USA
- Department of Physiology, Medical College of WisconsinMilwaukee, WI, USA
- Cardiovascular Research Center, Medical College of WisconsinMilwaukee, WI, USA
- Zablocki VA Medical CenterMilwaukee, WI, USA
- Department of Biomedical Engineering, Marquette UniversityMilwaukee, WI, USA
| | - Ranjan K. Dash
- Department of Physiology, Medical College of WisconsinMilwaukee, WI, USA
- Department of Biomedical Engineering, Marquette UniversityMilwaukee, WI, USA
- Biotechnology and Bioengineering Center, Medical College of WisconsinMilwaukee, WI, USA
| | - Zeljko J. Bosnjak
- Department of Anesthesiology, Medical College of WisconsinMilwaukee, WI, USA
- Department of Physiology, Medical College of WisconsinMilwaukee, WI, USA
- Cardiovascular Research Center, Medical College of WisconsinMilwaukee, WI, USA
| | - Amadou K. S. Camara
- Department of Anesthesiology, Medical College of WisconsinMilwaukee, WI, USA
- Cardiovascular Research Center, Medical College of WisconsinMilwaukee, WI, USA
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99
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Tota B, Angelone T, Cerra MC. The surging role of Chromogranin A in cardiovascular homeostasis. Front Chem 2014; 2:64. [PMID: 25177680 PMCID: PMC4132265 DOI: 10.3389/fchem.2014.00064] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Accepted: 07/25/2014] [Indexed: 02/06/2023] Open
Abstract
Together with Chromogranin B and Secretogranins, Chromogranin A (CGA) is stored in secretory (chromaffin) granules of the diffuse neuroendocrine system and released with noradrenalin and adrenalin. Co-stored within the granule together with neuropeptideY, cardiac natriuretic peptide hormones, several prohormones and their proteolytic enzymes, CGA is a multifunctional protein and a major marker of the sympatho-adrenal neuroendocrine activity. Due to its partial processing to several biologically active peptides, CGA appears an important pro-hormone implicated in relevant modulatory actions on endocrine, cardiovascular, metabolic, and immune systems through both direct and indirect sympatho-adrenergic interactions. As a part of this scenario, we here illustrate the emerging role exerted by the full-length CGA and its three derived fragments, i.e., Vasostatin 1, catestatin and serpinin, in the control of circulatory homeostasis with particular emphasis on their cardio-vascular actions under both physiological and physio-pathological conditions. The Vasostatin 1- and catestatin-induced cardiodepressive influences are achieved through anti-beta-adrenergic-NO-cGMP signaling, while serpinin acts like beta1-adrenergic agonist through AD-cAMP-independent NO signaling. On the whole, these actions contribute to widen our knowledge regarding the sympatho-chromaffin control of the cardiovascular system and its highly integrated “whip-brake” networks.
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Affiliation(s)
- Bruno Tota
- Department of Biology, Ecology and Earth Sciences, University of Calabria Arcavacata di Rende (CS), Italy
| | - Tommaso Angelone
- Department of Biology, Ecology and Earth Sciences, University of Calabria Arcavacata di Rende (CS), Italy
| | - Maria C Cerra
- Department of Biology, Ecology and Earth Sciences, University of Calabria Arcavacata di Rende (CS), Italy
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100
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Aceros H, Farah G, Noiseux N, Mukaddam-Daher S. Moxonidine modulates cytokine signalling and effects on cardiac cell viability. Eur J Pharmacol 2014; 740:168-82. [PMID: 25036265 DOI: 10.1016/j.ejphar.2014.06.047] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Revised: 06/23/2014] [Accepted: 06/25/2014] [Indexed: 10/25/2022]
Abstract
Regression of left ventricular hypertrophy and improved cardiac function in SHR by the centrally acting imidazoline I1-receptor agonist, moxonidine, are associated with differential actions on circulating and cardiac cytokines. Herein, we investigated cell-type specific I1-receptor (also known as nischarin) signalling and the mechanisms through which moxonidine may interfere with cytokines to affect cardiac cell viability. Studies were performed on neonatal rat cardiomyocytes and fibroblasts incubated with interleukin (IL)-1β (5 ng/ml), tumor necrosis factor (TNF)-α (10 ng/ml), and moxonidine (10(-7) and 10(-5) M), separately and in combination, for 15 min, and 24 and 48 h for the measurement of MAPKs (ERK1/2, JNK, and p38) and Akt activation and inducible NOS (iNOS) expression, by Western blotting, and cardiac cell viability/proliferation and apoptosis by flow cytometry, MTT assay, and Live/Dead assay. Participation of imidazoline I1-receptors and the signalling proteins in the detected effects was identified using imidazoline I1-receptor antagonist and signalling protein inhibitors. The results show that IL-1β, and to a lower extent, TNF-α, causes cell death and that moxonidine protects against starvation- as well as IL-1β -induced mortality, mainly by maintaining membrane integrity, and in part, by improving mitochondrial activity. The protection involves activation of Akt, ERK1/2, p38, JNK, and iNOS. In contrast, moxonidine stimulates basal and IL-1β-induced fibroblast mortality by mechanisms that include inhibition of JNK and iNOS. Thus, apart from their actions on the central nervous system, imidazoline I1-receptors are directly involved in cardiac cell growth and death, and may play an important role in cardiovascular diseases associated with inflammation.
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Affiliation(s)
- Henry Aceros
- Centre Hospitalier de L'Université de Montréal Research Center (CRCHUM), Montreal, Québec, Canada; Department of Pharmacology, Université de Montréal, Montreal, Québec, Canada
| | - Georges Farah
- Centre Hospitalier de L'Université de Montréal Research Center (CRCHUM), Montreal, Québec, Canada; Department of Pharmacology, Université de Montréal, Montreal, Québec, Canada
| | - Nicolas Noiseux
- Centre Hospitalier de L'Université de Montréal Research Center (CRCHUM), Montreal, Québec, Canada; Department of Medicine, Université de Montréal, Montreal, Québec, Canada
| | - Suhayla Mukaddam-Daher
- Centre Hospitalier de L'Université de Montréal Research Center (CRCHUM), Montreal, Québec, Canada; Department of Pharmacology, Université de Montréal, Montreal, Québec, Canada; Department of Medicine, Université de Montréal, Montreal, Québec, Canada.
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