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Li Y, Liu H, Peng W, Song Z. Nicorandil improves clinical outcomes in patients with stable angina pectoris requiring PCI: a systematic review and meta-analysis of 14 randomized trials. Expert Rev Clin Pharmacol 2018; 11:855-865. [PMID: 30079778 DOI: 10.1080/17512433.2018.1508342] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Yiliang Li
- Department of Neurology, The Third Xiangya Hospital, Central South University, Changsha, China
- Clinical Medicine, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Hai Liu
- Third Department of Cardiac Surgery, First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Wei Peng
- Department of Cardiology, The Central Hospital of Loudi Affiliated to the University of South China, Loudi, China
| | - Zhi Song
- Department of Neurology, The Third Xiangya Hospital, Central South University, Changsha, China
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Connexin 43 and ATP-sensitive potassium channels crosstalk: a missing link in hypoxia/ischemia stress. Cell Tissue Res 2017; 371:213-222. [PMID: 29185069 DOI: 10.1007/s00441-017-2736-3] [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: 07/27/2017] [Accepted: 11/06/2017] [Indexed: 12/28/2022]
Abstract
Connexin 43 (Cx43) is a gap junction protein expressed in various tissues and organs of vertebrates. Besides functioning as a gap junction, Cx43 also regulates diverse cellular processes like cell growth and differentiation, cell migration, cell survival, etc. Cx43 is critical for normal cardiac functioning and is therefore abundantly expressed in cardiomyocytes. On the other hand, ATP-sensitive potassium (KATP) channels are metabolic sensors converting metabolic changes into electrical activity. These channels are important in maintaining the neurotransmitter release, smooth muscle relaxation, cardiac action potential repolarization, normal physiology of cellular repolarization, insulin secretion and immune function. Cx43 and KATP channels are part of the same signaling pathway, regulating cell survival during stress conditions and ischemia/hypoxia preconditioning. However, the underlying molecular mechanism for their combined role in ischemia/hypoxia preconditioning is largely unknown. The current review focuses on understanding the molecular mechanism responsible for the coordinated role of Cx43 and KATP channel protein in protecting cardiomyocytes against ischemia/hypoxia stress.
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Zhang YQ, Tian F, Zhou Y, Chen YD, Li B, Ma Q, Zhang Y. Nicorandil attenuates carotid intimal hyperplasia after balloon catheter injury in diabetic rats. Cardiovasc Diabetol 2016; 15:62. [PMID: 27059601 PMCID: PMC4826484 DOI: 10.1186/s12933-016-0377-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Accepted: 03/25/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Diabetic patients suffer from undesired intimal hyperplasia after angioplasty. Nicorandil has a trend to reduce the rate of target lesion revascularization. However, whether nicorandil inhibits intimal hyperplasia and the possible mechanisms underlying it remain to be determined. We aimed at assessing the effect of nicorandil on intimal hyperplasia in diabetic rats. METHODS After intraperitoneal injection of streptozotocin (STZ, 50 mg/kg), balloon injury model was established in carotid arteries of diabetic rats. Rats were randomized to vehicle, nicorandil (15 mg/kg/day) or 5-hydroxydecanoate (5-HD, 10 mg/kg/day), a mitochondrial ATP-sensitive potassium channel (mitoKATP channel)-selective antagonist. Perivascular delivery of εPKC siRNA was conducted to determine the role of εPKC pathway in intimal hyperplasia. In hyperglycemia environment (25 mM glucose), primary culture of vascular smooth muscle cells (VSMCs) were treated with nicorandil or 5-HD. Cell proliferation and cell migration were analyzed. RESULTS Intimal hyperplasia significantly increased 14 days after balloon injury in diabetic rats (p < 0.01). Nicorandil inhibited intima development, reduced inflammation and prevented cell proliferation in balloon-injured arteries (p < 0.01). The protective effects of nicorandil were reversed by 5-HD (p < 0.05). εPKC was activated in balloon-injured arteries (p < 0.01). Nicorandil inhibited εPKC activation by opening mitoKATP channel. Perivascular delivery of εPKC siRNA inhibited intimal hyperplasia, inflammation and cell proliferation (p < 0.01). High glucose-induced VSMCs proliferation and migration were inhibited by nicorandil. εPKC activation induced by high glucose was also inhibited by nicorandil and that is partially reversed by 5-HD. εPKC knockdown prevented VSMCs proliferation and migration (p < 0.01). CONCLUSIONS Our study demonstrates that nicorandil inhibits intimal hyperplasia in balloon-injured arteries in diabetic rats. Nicorandil also prevents VSMCs proliferation and migration induced by high glucose. The beneficial effect of nicorandil is conducted via opening mitoKATP channel and inhibiting εPKC activation.
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Affiliation(s)
- Ying Qian Zhang
- Department of Cardiology, Chinese PLA General Hospital, 28 Fuxing Rd, Beijing, 100853, China
| | - Feng Tian
- Department of Cardiology, Chinese PLA General Hospital, 28 Fuxing Rd, Beijing, 100853, China
| | - Ying Zhou
- Department of Cardiology, Chinese PLA General Hospital, 28 Fuxing Rd, Beijing, 100853, China
| | - Yun Dai Chen
- Department of Cardiology, Chinese PLA General Hospital, 28 Fuxing Rd, Beijing, 100853, China.
| | - Bo Li
- Department of Cardiology, Chinese PLA General Hospital, 28 Fuxing Rd, Beijing, 100853, China
| | - Qiang Ma
- Department of Cardiology, Chinese PLA General Hospital, 28 Fuxing Rd, Beijing, 100853, China
| | - Ying Zhang
- Department of Cardiology, Chinese PLA General Hospital, 28 Fuxing Rd, Beijing, 100853, China
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Qiu J, Zhou S, Liu Q. Phosphorylated AMP-activated protein kinase slows down the atrial fibrillation progression by activating Connexin43. Int J Cardiol 2016; 208:56-7. [PMID: 26828380 DOI: 10.1016/j.ijcard.2016.01.201] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Accepted: 01/15/2016] [Indexed: 12/25/2022]
Affiliation(s)
- Jie Qiu
- Department of Cardiology/Cardiac Catheterisation Lab, Second Xiangya Hospital, Central South University, Changsha City, Hunan Province 410011, China
| | - Shenghua Zhou
- Department of Cardiology/Cardiac Catheterisation Lab, Second Xiangya Hospital, Central South University, Changsha City, Hunan Province 410011, China
| | - Qiming Liu
- Department of Cardiology/Cardiac Catheterisation Lab, Second Xiangya Hospital, Central South University, Changsha City, Hunan Province 410011, China.
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Mohamed SS, Ahmed LA, Attia WA, Khattab MM. Nicorandil enhances the efficacy of mesenchymal stem cell therapy in isoproterenol-induced heart failure in rats. Biochem Pharmacol 2015; 98:403-11. [PMID: 26453143 DOI: 10.1016/j.bcp.2015.10.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Accepted: 10/02/2015] [Indexed: 12/14/2022]
Abstract
Stem cell transplantation has emerged as a promising technique for regenerative medicine in cardiovascular therapeutics. However, the results have been less than optimal. The aim of the present study was to investigate whether nicorandil could offer an additional benefit over bone marrow-derived mesenchymal stem cell therapy in isoproterenol-induced myocardial damage and its progression to heart failure in rats. Isoproterenol was injected subcutaneously for 2 consecutive days at doses of 85 and 170 mg/kg/day, respectively. Nicorandil (3 mg/kg/day) was then given orally with or without a single intravenous bone marrow-derived mesenchymal stem cell administration. Electrocardiography and echocardiography were recorded 2 weeks after the beginning of treatment. Rats were then sacrificed and the ventricle was isolated for estimation of tumor necrosis factor-alpha, vascular endothelial growth factor and transforming growth factor-beta. Moreover, protein expressions of caspase-3, connexin-43 as well as endothelial and inducible nitric oxide synthases were evaluated. Finally, histological studies of myocardial fibrosis and blood vessel density were performed and cryosections were done for estimation cell homing. Combined nicorandil/bone marrow-derived mesenchymal stem cell therapy provided an additional improvement compared to cell therapy alone toward reducing isoproterenol-induced cardiac hypertrophy, fibrosis and inflammation. Notably, combined therapy induced significant increase in angiogenesis and cell homing and prevented isoproterenol-induced changes in contractility and apoptotic markers. In conclusion, combined nicorandil/bone marrow-derived mesenchymal stem cell therapy was superior to cell therapy alone toward preventing isoproterenol-induced heart failure in rats through creation of a supportive environment for mesenchymal stem cells.
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Affiliation(s)
- Sarah S Mohamed
- Pharmacology and Toxicology Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt.
| | - Lamiaa A Ahmed
- Pharmacology and Toxicology Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt.
| | - Wael A Attia
- Pediatric Department, Pediatric Cardiology Unit, Abou EL-Reesh Children Hospital, Cairo, Egypt.
| | - Mahmoud M Khattab
- Pharmacology and Toxicology Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt.
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SUN JIMIN, WANG CHUNMIAO, GUO ZENG, HAO YUYU, XIE YANGJING, GU JIAN, WANG AILING. Reduction of isoproterenol-induced cardiac hypertrophy and modulation of myocardial connexin43 by a KATP channel agonist. Mol Med Rep 2014; 11:1845-50. [DOI: 10.3892/mmr.2014.2988] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2013] [Accepted: 07/21/2014] [Indexed: 11/05/2022] Open
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Buelna-Chontal M, Guevara-Chávez JG, Silva-Palacios A, Medina-Campos ON, Pedraza-Chaverri J, Zazueta C. Nrf2-regulated antioxidant response is activated by protein kinase C in postconditioned rat hearts. Free Radic Biol Med 2014; 74:145-56. [PMID: 24992834 DOI: 10.1016/j.freeradbiomed.2014.06.021] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Revised: 06/19/2014] [Accepted: 06/24/2014] [Indexed: 12/21/2022]
Abstract
Postconditioning (PostC) activates endogenous protective mechanisms that contend against reperfusion injury. Nevertheless, although PostC efficiency in both experimental studies and clinical trials has been demonstrated, a complete picture of the interacting mechanisms, particularly the relationship between kinase signaling and redox maintenance, is still lacking. To unravel such association, in this work we focus on the participation of protein kinase C (PKC) and the transcription factor nuclear factor E2-related factor 2 (Nrf2) in the cardioprotective response elicited by PostC. PostC was performed in an in vivo rat model by applying three repetitive cycles of ischemia and reperfusion (10 s each), followed by evaluation of heart function and infarct size measurements. PKC activation and Nrf2 phosphorylation were evaluated after 10 min of reperfusion, whereas Nrf2 activity and the content and activities of Nrf2-regulated antioxidant proteins were evaluated after 60 min of reperfusion in PostC hearts. Maintenance of heart function and diminution in infarct size concurred with PKC activation and Nrf2 phosphorylation. PKC inhibition diminished Nrf2 phosphorylation and transcriptional activity in association with diminished levels and activities of Nrf2-regulated antioxidant proteins. In conclusion, this study proposes that the novel pathway PKC/Nrf2 participates in the long-term protective mechanisms induced by PostC application by maintaining the antioxidant defense system.
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Affiliation(s)
- Mabel Buelna-Chontal
- Department of Cardiovascular Biomedicine, National Institute of Cardiology I. Ch., Mexico City 14080, DF, Mexico
| | | | - Alejandro Silva-Palacios
- Department of Cardiovascular Biomedicine, National Institute of Cardiology I. Ch., Mexico City 14080, DF, Mexico
| | - Omar-Noel Medina-Campos
- Biology Department, Faculty of Chemistry, National Autonomous University of Mexico, Mexico City, DF, Mexico
| | - José Pedraza-Chaverri
- Biology Department, Faculty of Chemistry, National Autonomous University of Mexico, Mexico City, DF, Mexico
| | - Cecilia Zazueta
- Department of Cardiovascular Biomedicine, National Institute of Cardiology I. Ch., Mexico City 14080, DF, Mexico.
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Han Y, Guo Z, Wang LL, Zhang LZ, Yao TP. Antagonism of endogenous nociceptin/orphanin FQ inhibits infarction-associated ventricular arrhythmias via PKC-dependent mechanism in rats. Br J Pharmacol 2014; 170:614-23. [PMID: 23869704 DOI: 10.1111/bph.12310] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2012] [Revised: 07/02/2013] [Accepted: 07/12/2013] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND AND PURPOSE Evidence indicates nociceptin/orphanin FQ (N/OFQ) may participate in the pathology of cardiac arrhythmias associated with myocardial infarction. But the role of N/OFQ in the arrhythmogenesis in acute myocardial infarction is unclear. The aim of this study was to investigate the effects of endogenous N/OFQ on infarction-associated arrhythmias. EXPERIMENTAL APPROACH The expression of N/OFQ, PKC activity and ventricular arrhythmias in presence and absence of UFP-101, a specific antagonist of N/OFQ receptor, were examined following permanent coronary artery occlusion in anaesthetized rats. The effect of N/OFQ on action potential duration was examined in isolated rat cardiomyocytes. KEY RESULTS It was observed that N/OFQ was increased by 41% in the myocardium after coronary artery occlusion (P < 0.01 vs. control). Pretreatment with UFP-101 (10(-7) mol·kg(-1) , i.v.) reduced the incidence of ventricular ectopic beats by 70% and ventricular tachycardia by 51% respectively (all P < 0.05 vs. control). Meanwhile, PKC activity was elevated in the rats treated with UFP-101 (by 35%, P < 0.05 vs. control). A selective PKC inhibitor, calphostin C, completely abolished the anti-arrhythmic effects of UFP-101 (P < 0.01). N/OFQ (at 10(-11) , 10(-9) and 1 × 10(-7) mol·L(-1) ) shortened the action potential duration by 3% (P > 0.05), 10% (P < 0.05) and 22% (P < 0.01), respectively, via N/OFQ receptor. CONCLUSIONS AND IMPLICATIONS Antagonism of endogenous N/OFQ produces anti-arrhythmic effects on ventricular arrhythmias in acute myocardial infarction, possibly via modulating PKC activity and action potential of myocytes.
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Affiliation(s)
- Y Han
- Department of Anesthesiology, Shanxi Medical University, Second Hospital of Shanxi Medical University, Taiyuan, China
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