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Jing Y, Qi L, Zhang X, Zheng L, Yang P, Yin J, Shi Y, Yan S. miR-let-7a inhibits sympathetic nerve remodeling after myocardial infarction by downregulating the expression of nerve growth factor. Open Med (Wars) 2024; 19:20240975. [PMID: 38883335 PMCID: PMC11179384 DOI: 10.1515/med-2024-0975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Revised: 04/15/2024] [Accepted: 05/02/2024] [Indexed: 06/18/2024] Open
Abstract
Objective Sympathetic hyperinnervation following myocardial infarction (MI) is one of the primary causes of ventricular arrhythmias (VAs) after MI. Nerve growth factor (NGF) is a key molecule that induces sympathetic nerve remodeling. Previous studies have confirmed that microRNA (miR)-let-7a interacts with NGF. However, whether miR-let-7a is involved in sympathetic remodeling after MI remains unknown. We aimed to investigate whether miR-let-7a was associated with the occurrence of VA after MI. Methods and results A rat model of myocardial infarction was established using left coronary artery ligation. miR-let-7a expression levels were analyzed by reverse transcription-quantitative PCR. Western blotting was also used to examine NGF expression levels in vivo and in M1 macrophages in vitro. The relationship between miR-let-7a and NGF levels was investigated using a luciferase reporter assay. The results revealed that the expression of miR-let-7a decreased significantly after MI, while NGF expression was significantly upregulated. In addition, overexpression of miR-let-7a effectively inhibited NGF expression in rats, which was also verified in M1 macrophages. Tyrosine hydroxylase and growth-associated protein 43 immunofluorescence results revealed that the administration of a miR-let-7a overexpression lentivirus to rats inhibited sympathetic remodeling after MI. Programmed electrical stimulation, renal sympathetic nerve activity recording, and heart rate variability measurements showed that miR-let-7a overexpression decreased sympathetic activity. Conclusions These findings provide novel insights into the molecular mechanisms by which miR-let-7a and NGF contribute to the progression of sympathetic nerve remodeling after MI. Therefore, miR-let-7a may be a promising therapeutic target to reduce the incidence of arrhythmia following MI.
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Affiliation(s)
- Yanyan Jing
- Department of Cardiology, Yantai Yuhuangding Hospital, Shandong University, Yantai, China
- Department of Cardiology, Shandong Qianfoshan Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Lei Qi
- Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, China
- Department of Cardiology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Medicine and Health Key Laboratory of Cardiac Electrophysiology and Arrhythmia, Shandong, 250014, China
| | - Xueli Zhang
- Department of Cardiology, Shandong Qianfoshan Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Lu Zheng
- Department of Cardiology, Shandong Qianfoshan Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Peijin Yang
- Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, China
- Department of Cardiology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Medicine and Health Key Laboratory of Cardiac Electrophysiology and Arrhythmia, Shandong, 250014, China
| | - Jie Yin
- Department of Cardiology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Medicine and Health Key Laboratory of Cardiac Electrophysiology and Arrhythmia, Shandong, 250014, China
| | - Yugen Shi
- Department of Cardiology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Medicine and Health Key Laboratory of Cardiac Electrophysiology and Arrhythmia, Shandong, 250014, China
| | - Suhua Yan
- Department of Cardiology, Shandong Qianfoshan Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
- Department of Cardiology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Medicine and Health Key Laboratory of Cardiac Electrophysiology and Arrhythmia, 16766 Jingshi Road, Jinan, Shandong, 250014, China
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Ke J, Zhu C, Zhang Y, Zhang W. Anti-Arrhythmic Effects of Linalool via Cx43 Expression in a Rat Model of Myocardial Infarction. Front Pharmacol 2020; 11:926. [PMID: 32670059 PMCID: PMC7329979 DOI: 10.3389/fphar.2020.00926] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Accepted: 06/08/2020] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Lavender is a traditional therapy for different heart symptoms including palpitation, which comprises an important symptom of cardiac arrhythmias. This experiment was designed to evaluate the antiarrhythmic effects of linalool using an experimental model of arrhythmia following myocardial infarction in rats. The underlying electrophysiological mechanism through cardiac connexin 43 (Cx43) expression was also investigated. METHODS Fifty male Sprague-Dawley rats were divided into five equal groups. The first group was considered as the normal control group; MI was induced by ligation of the left anterior descending artery (LAD) in the second group. The other three groups received metoprolol (100 mg/kg/day) or linalool (50 or 100 mg/kg/day) for seven days before LAD ligation. The arrhythmia score, isolated myocyte resting potential, histological changes, and cardiac Cx43 expression levels were evaluated. RESULTS In the MI group, there was a significant increase in the arrhythmia score but a marked decrease in resting membrane potential relative to the control; these changes were prevented by the administration of metoprolol or linalool. The histological changes were also minimized in the groups treated with these substances compared to the untreated MI group. The western blot and real-time PCR results showed that the protein expression of Cx43 in the infarct zone of the rat hearts was significantly higher in the MI groups receiving metoprolol or linalool compared with the untreated MI group. CONCLUSION Linalool was shown to be able to dose-dependently decrease the incidence of arrhythmias in a rat model of myocardial infarction. We propose that the key mechanism behind this antiarrhythmic effect is probably the prevention of decreased Cx43 expression following MI.
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Affiliation(s)
- Jianlin Ke
- Second Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Canzhan Zhu
- Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | | | - Wenlong Zhang
- Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
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Hu H, Xuan Y, Xue M, Cheng W, Wang Y, Li X, Yin J, Li X, Yang N, Shi Y, Yan S. Semaphorin 3A attenuates cardiac autonomic disorders and reduces inducible ventricular arrhythmias in rats with experimental myocardial infarction. BMC Cardiovasc Disord 2016; 16:16. [PMID: 26787044 PMCID: PMC4719212 DOI: 10.1186/s12872-016-0192-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Accepted: 01/08/2016] [Indexed: 01/14/2023] Open
Abstract
BACKGROUND To investigate the effects of semaphorin 3A (sema 3A) on cardiac autonomic regulation and subsequent ventricular arrhythmias (VAs) in post-infarcted hearts. METHOD AND RESULTS In order to explore the functions of sema 3A in post-infarcted hearts, lentivirus-Sema 3A-shRNA and negative control vectors were delivered to the peri-infarcted myocardium rats respectively. Meanwhile, recombinant sema 3A and control (0.9% NaCl solution) were injected intravenously into infarcted rats to test the therapeutic potential of sema 3A. Results indicated that levels of sema 3A were higher in post-infarcted hearts compared with sham rats. However, sema 3A silencing leaded to sympathetic hyperinnervation, increased myocardial norepinephrine (NE) content and inducible VAs. Conversely, the intravenous administration of sema 3A to infarcted rats reduced sympathetic nerve sprouting, improved cardiac autonomic regulation, and decreased the incidence of inducible VAs. However, both infarct size and cardiac function were similar among infarcted hearts. CONCLUSIONS The upregulation and administration of sema 3A exerted beneficial effects on infarction-induced cardiac autonomic disorders by increasing cardiac electrical stability and reducing VAs. Sema 3A might be a potential therapeutic agent for cardiac autonomic abnormalities induced arrhythmias.
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Affiliation(s)
- Hesheng Hu
- Department of Cardiology, Shandong Provincial Qianfoshan Hospital, Shandong University, 250014, Jinan, China.
| | - Yongli Xuan
- Department of Cardiology, Shandong Provincial Qianfoshan Hospital, Shandong University, 250014, Jinan, China.
| | - Mei Xue
- Department of Cardiology, Shandong Provincial Qianfoshan Hospital, Shandong University, 250014, Jinan, China.
| | - Wenjuan Cheng
- Department of Cardiology, Shandong Provincial Qianfoshan Hospital, Shandong University, 250014, Jinan, China.
| | - Ye Wang
- Department of Cardiology, Shandong Provincial Qianfoshan Hospital, Shandong University, 250014, Jinan, China.
| | - Xinran Li
- Department of Cardiology, Shandong Provincial Qianfoshan Hospital, Shandong University, 250014, Jinan, China.
| | - Jie Yin
- Department of Cardiology, Shandong Provincial Qianfoshan Hospital, Shandong University, 250014, Jinan, China.
| | - Xiaolu Li
- Department of Cardiology, Shandong Provincial Qianfoshan Hospital, Shandong University, 250014, Jinan, China.
| | - Na Yang
- Department of Cardiology, Shandong Provincial Qianfoshan Hospital, Shandong University, 250014, Jinan, China.
| | - Yugen Shi
- Department of Cardiology, Shandong Provincial Qianfoshan Hospital, Shandong University, 250014, Jinan, China.
| | - Suhua Yan
- Department of Cardiology, Shandong Provincial Qianfoshan Hospital, Shandong University, 250014, Jinan, China.
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Hu H, Xuan Y, Wang Y, Xue M, Suo F, Li X, Cheng W, Li X, Yin J, Liu J, Yan S. Targeted NGF siRNA delivery attenuates sympathetic nerve sprouting and deteriorates cardiac dysfunction in rats with myocardial infarction. PLoS One 2014; 9:e95106. [PMID: 24755692 PMCID: PMC3995702 DOI: 10.1371/journal.pone.0095106] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Accepted: 03/24/2014] [Indexed: 01/23/2023] Open
Abstract
Nerve growth factor (NGF) is involved in nerve sprouting, hyper-innervation, angiogenesis, anti-apoptosis, and preservation of cardiac function after myocardial infarction (MI). Positively modulating NGF expression may represent a novel pharmacological strategy to improve post-infarction prognosis. In this study, lentivirus encoding NGF short interfering RNA (siRNA) was prepared, and MI was modeled in the rat using left anterior descending coronary artery ligation. Rats were randomly grouped to receive intramyocardial injection of lentiviral solution containing NGF-siRNA (n = 19, MI-SiNGF group), lentiviral solution containing empty vector (n = 18, MI-GFP group) or 0.9% NaCl solution (n = 18, MI-control group), or to receive thoracotomy and pericardiotomy (n = 17, sham-operated group). At 1, 2, 4, and 8 wk after transduction, rats in the MI-control group had higher levels of NGF mRNA and protein than those in the sham-operated group, rats in the MI-GFP group showed similar levels as the MI-control group, and rats in the MI-SiNGF group had lower levels compared to the MI-GFP group, indicating that MI model was successfully established and NGF siRNA effectively inhibited the expression of NGF. At 8 wk, echocardiographic and hemodynamic studies revealed a more severe cardiac dysfunction in the MI-siRNA group compared to the MI-GFP group. Moreover, rats in the MI-siRNA group had lower mRNA and protein expression levels of tyrosine hydroxylase (TH) and growth-associated protein 43-positive nerve fibers (GAP-43) at both the infarcted border and within the non-infarcted left ventricles (LV). NGF silencing also reduced the vascular endothelial growth factor (VEGF) expression and decreased the arteriolar and capillary densities at the infarcted border compared to the MI-GFP group. Histological analysis indicated a large infarcted size in the MI-SiNGF group. These findings suggested that endogenous NGF silencing attenuated sympathetic nerve sprouting and angiogenesis, enlarged the infarct size, aggravated cardiac dysfunction, and potentially contributed to an unfavorable prognosis after MI.
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Affiliation(s)
- Hesheng Hu
- School of Medicine, Shandong University, Jinan, China
- Department of Cardiology, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan, China
| | - Yongli Xuan
- School of Medicine, Shandong University, Jinan, China
| | - Ye Wang
- Department of Cardiology, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan, China
| | - Mei Xue
- Department of Cardiology, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan, China
| | - Fei Suo
- School of Medicine, Shandong University, Jinan, China
- Department of Cardiology, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan, China
| | - Xiaolu Li
- Department of Cardiology, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan, China
| | - Wenjuan Cheng
- School of Medicine, Shandong University, Jinan, China
- Department of Cardiology, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan, China
| | - Xinran Li
- School of Medicine, Shandong University, Jinan, China
| | - Jie Yin
- School of Medicine, Shandong University, Jinan, China
| | - Ju Liu
- Medical Research Center, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan, China
| | - Suhua Yan
- Department of Cardiology, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan, China
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Xue M, Xuan YL, Wang Y, Hu HS, Li XL, Suo F, Li XR, Cheng WJ, Yan SH. Exogenous nerve growth factor promotes the repair of cardiac sympathetic heterogeneity and electrophysiological instability in diabetic rats. Cardiology 2013; 127:155-63. [PMID: 24356397 DOI: 10.1159/000355535] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2013] [Accepted: 09/07/2013] [Indexed: 11/19/2022]
Abstract
OBJECTIVES Diabetic cardiac autonomic neuropathy can lead to an increased incidence of ventricular arrhythmias (VAs). However, few data are available regarding the pathogenesis and therapy of the VAs accompanying diabetic cardiac autonomic neuropathy. We aimed to explore whether or not exogenous nerve growth factor (NGF) can reduce the sympathetic heterogeneity and the incidence of VAs in diabetes mellitus (DM). METHODS Male Wistar rats were randomly divided into 3 groups: controls, rats with DM with saline infused into the left stellate ganglion (LSG), i.e. the DS group and rats with DM with NGF infused into the LSG, i.e. the DN group. After 28 weeks, all rats were subjected to electrophysiological experiments. Sympathetic innervations and NGF were studied by immunostaining, RT-PCR or Western blot analysis. RESULTS The incidence of inducible VAs was significantly higher in the DS group than in the control group, but was markedly decreased in the DN group. In the DS group, the tyrosine hydroxylase (TH) and NGF expression were significantly lower than in the other groups, and significant proximal-distal heterogeneities existed regarding the TH and NGF expression in the left ventricle, but were markedly repaired in the DN group. CONCLUSIONS NGF intervention in the LSG can reduce the heterogeneity of cardiac sympathetic innervations and the incidence of VAs in diabetic rats.
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Affiliation(s)
- Mei Xue
- Department of Cardiology, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan, P.R. China
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Zhang S, Zhang M, Goldstein S, Li Y, Ge J, He B, Ruiz G. The effect of c-fos on acute myocardial infarction and the significance of metoprolol intervention in a rat model. Cell Biochem Biophys 2013; 65:249-55. [PMID: 23054911 DOI: 10.1007/s12013-012-9428-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Over-expression of c-fos may play a role in some diseases. Research pertaining to the expression of c-fos in acute myocardial ınfarction (AMI) is rare, and the detailed role of c-fos in AMI has not been reported. Therefore, the purpose of this project was to elucidate the detailed effect of c-fos on AMI rats and evaluate the effect of a metoprolol intervention. An AMI rat model was established for the purposes of this study. The expression of c-fos in AMI was evaluated via immunohistochemical analysis and in situ hybridization. Simultaneously, we investigated the effect of c-fos on AMI rats via medicinal treatment with c-fos monoclonal antibody, isoproterenol, and metoprolol. Positive c-Fos protein expression and c-fos mRNA expression in cardiomyocytes were increased at 1, 3, 7, and 10 days after ligation in AMI rats compared with a sham-operated group. Peak expression occurred at 3 days after ligation. The weight percentage fraction of infarct size was decreased in rats treated with c-fos monoclonal antibody compared with the control normal saline treatment group. The weight percentage fraction of infarction size was increased after c-fos was increased via the administration of isoproterenol. c-Fos protein expression and the infarct size in rats treated with metoprolol were also decreased compared with the control normal saline treatment group. The results showed that c-fos expression rapidly increased after coronary ligation; c-fos plays an important role in myocardial lesions and is likely to be involved in the pathogenesis of AMI as well. Metoprolol can inhibit the expression of c-fos and has a positive therapeutic effect on rats after AMI; the involvement effect of metoprolol on myocardial infarction might be correlated with its effect on the inhibition of c-fos.
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Affiliation(s)
- Song Zhang
- Department of Cardiovascular Diseases, Xinhua Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
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Myocardial infarction induces sympathetic hyperinnervation via a nuclear factor-κB-dependent pathway in rabbit hearts. Neurosci Lett 2013; 535:128-33. [DOI: 10.1016/j.neulet.2012.12.059] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2012] [Revised: 12/18/2012] [Accepted: 12/31/2012] [Indexed: 11/19/2022]
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Wang Y, Liu J, Suo F, Hu HS, Xue M, Cheng WJ, Xuan YL, Yan SH. Metoprolol-Mediated Amelioration of Sympathetic Nerve Sprouting after Myocardial Infarction. Cardiology 2013; 126:50-8. [DOI: 10.1159/000351074] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2013] [Accepted: 03/27/2013] [Indexed: 11/19/2022]
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Wang Y, Xuan YL, Hu HS, Li XL, Xue M, Cheng WJ, Suo F, Yan SH. Risk of Ventricular Arrhythmias after Myocardial Infarction with Diabetes Associated with Sympathetic Neural Remodeling in Rabbits. Cardiology 2012; 121:1-9. [DOI: 10.1159/000336148] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2011] [Accepted: 12/23/2011] [Indexed: 11/19/2022]
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Chen KY, Li YJ, Huang TG, Li YM. Neural remodeling may partly contribute to the abnormality of excitation–contraction coupling in heart failure. Med Hypotheses 2008; 70:112-6. [PMID: 17560046 DOI: 10.1016/j.mehy.2007.04.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2007] [Accepted: 04/03/2007] [Indexed: 10/23/2022]
Abstract
Heart failure (HF) is a major and growing public health problem in the world. About 50% of deaths in HF occur suddenly due to malignant arrhythmia. Therefore, exploring the further mechanisms of chronic HF and finding new therapy targets are essential for the progression of HF treatment. Recently, some published papers suggested that myocardial neural remodeling and abnormal excitation-contraction (EC) coupling might partly contribute to the development of HF and sudden cardiac death. Even though a few studies have demonstrated that the sympathetic nerve system (SNS) may have significant impact on the functional states of myocardial EC coupling through the beta-adrenergic signaling pathway, so far, it still remains unknown that whether neural remodeling affects the EC coupling. Studies from Marks' group demonstrated that 70% of cardiac ryanodine receptors (RyR2), which located on the sarcoplasmic reculum (SR) controlling intracellular Ca(2+) release and muscle contraction in the heart, from failing hearts were abnormal and only 15% exhibited the most severe defects. In addition, Litwin et al. observed that temporal and spatial heterogeneities in local Ca(2+) release events in a rabbit model of HF after myocardial infarction. Because some studies have demonstrated that chronic SNS hyperactivity in HF led to protein kinase A (PKA) hyperphosphorylation of RyR2 in the heart, and the myocardial sympathetic nerve distribution become heterogeneous in the setting of HF. Thus, it is reasonable for us to propose the hypothesis that neural remodeling may partly account for the abnormality of EC coupling in HF.
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Affiliation(s)
- Kang-Yin Chen
- Department of Cardiology, Second Hospital of Tianjin Medical University, Tianjin 300211, China.
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Effects of metoprolol treatment on a disintegrin metalloproteinase expression and extracellular matrix remodeling after myocardial infarction in rats. Chin Med J (Engl) 2007. [DOI: 10.1097/00029330-200709010-00016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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