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Xu R, Fu J, Hu Y, Yang X, Tao X, Chen L, Huang K, Fu Q. Roflumilast-Mediated Phosphodiesterase 4D Inhibition Reverses Diabetes-Associated Cardiac Dysfunction and Remodeling: Effects Beyond Glucose Lowering. Diabetes 2022; 71:1660-1678. [PMID: 35594380 DOI: 10.2337/db21-0898] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 05/02/2022] [Indexed: 11/13/2022]
Abstract
Patients with type 2 diabetes have a substantial risk of developing cardiovascular disease. Phosphodiesterase 4 (PDE4) dysregulation is of pathophysiological importance in metabolic disorders. For determination of the role of PDE4 in diabetic cardiac dysfunction, mice fed with a high-fat diet (HFD) were treated by pharmacological inhibition of PDE4 or cardiac specific knocking down of PDE4D. Mice on HFD developed diabetes and cardiac dysfunction with increased cardiac PDE4D5 expression. PDE4 inhibitor roflumilast can reverse hyperglycemia and cardiac dysfunction, accompanied by the decrease of PDE4D expression and increase of muscle specific miRNA miR-1 level in hearts. Either cardiac specific PDE4D knockdown or miR-1 overexpression significantly reversed cardiac dysfunction in HFD mice, despite persistence of hyperglycemia. Findings of gain- and loss-of-function studies of PDE4D in cardiomyocytes indicated that inhibition of insulin-induced PDE4D protected cardiac hypertrophy by preserving miR-1 expression in cardiomyocytes through promoting cAMP-CREB-Sirt1 signaling-induced SERCA2a expression. We further revealed that insulin also induced PDE4D expression in cardiac fibroblasts, which causes cardiac fibrosis through TGF-β1 signaling-mediated miR-1 reduction. Importantly, the expression of PDE4D5 was increased in human failing hearts of individuals with diabetes. These studies elucidate a novel mechanism by which hyperinsulinemia-induced cardiac PDE4D expression contributes to diabetic cardiac remodeling through reducing the expression of miR-1 and upregulation of miR-1 target hypertrophy and fibrosis-associated genes. Our study suggests a therapeutic potential of PDE4 inhibitor roflumilast in preventing or treating cardiac dysfunction in diabetes in addition to lowering glucose.
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Affiliation(s)
- Rui Xu
- Department of Pharmacology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Key Laboratory for Drug Target Research and Pharmacodynamic Evaluation of Hubei Province, Wuhan, China
| | - Jing Fu
- Department of Pharmacology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Key Laboratory for Drug Target Research and Pharmacodynamic Evaluation of Hubei Province, Wuhan, China
| | - Yuting Hu
- Department of Pharmacology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiaoyan Yang
- Department of Pharmacology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Key Laboratory for Drug Target Research and Pharmacodynamic Evaluation of Hubei Province, Wuhan, China
| | - Xiang Tao
- Department of Pharmacology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Clinical Center of Human Gene Research, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Long Chen
- Clinical Center of Human Gene Research, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Kai Huang
- Clinical Center of Human Gene Research, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qin Fu
- Department of Pharmacology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Key Laboratory for Drug Target Research and Pharmacodynamic Evaluation of Hubei Province, Wuhan, China
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The mitochondrial signaling peptide MOTS-c improves myocardial performance during exercise training in rats. Sci Rep 2021; 11:20077. [PMID: 34635713 PMCID: PMC8505603 DOI: 10.1038/s41598-021-99568-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Accepted: 09/22/2021] [Indexed: 01/01/2023] Open
Abstract
Cardiac remodeling is a physiological adaptation to aerobic exercise and which is characterized by increases in ventricular volume and the number of cardiomyocytes. The mitochondrial derived peptide MOTS-c functions as an important regulator in physical capacity and performance. Exercise elevates levels of endogenous MOTS-c in circulation and in myocardium, while MOTS-c can significantly enhance exercise capacity. However, the effects of aerobic exercise combined with MOTS-c on cardiac structure and function are unclear. We used pressure–volume conductance catheter technique to examine cardiac function in exercised rats with and without treatment with MOTS-c. Surprisingly, MOTS-c improved myocardial mechanical efficiency, enhanced cardiac systolic function, and had a tendency to improve the diastolic function. The findings suggest that using exercise supplements could be used to modulate the cardiovascular benefits of athletic training.
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Koshman YE, Wilsey AS, Bird BM, Sadilek S, Weisbecker DA, Ebert PA, Polakowski JS, Gintant GA, Mittelstadt SW, Foley CM. Automated blood sampling in canine telemetry studies: Enabling enhanced assessments of cardiovascular liabilities and safety margins. J Pharmacol Toxicol Methods 2021; 111:107109. [PMID: 34416395 DOI: 10.1016/j.vascn.2021.107109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
INTRODUCTION A successful integration of automated blood sampling (ABS) into the telemetry instrumented canine cardiovascular model is presented in this study. This combined model provides an efficient means to quickly gain understanding of potential effects on key cardiovascular parameters in dog while providing a complete Pharmacokinetic/Pharmacodynamic (PK/PD) profile for discovery compounds without handling artifacts, reducing the need for a separate pharmacokinetic study. METHODS Male beagle dogs were chronically implanted with telemetry devices (PhysioTel™ model D70-PCTP) and vascular access ports (SPMID-GRIDAC-5NC). BASi Culex-L automated blood sampling (Bioanalytical Systems, Inc) system was used to collect blood samples at multiple time points. A series of four use cases utilizing four different test compounds and analytical endpoints are described to illustrate some of the potential applications of the technique. RESULTS In the four presented use cases, automated blood sampling in telemetry instrumented dogs provides simultaneous cardiovascular (heart rate, arterial blood pressure, and left ventricular pressure), electrophysiological assessment (QTc, PR, and QRS intervals), body temperature, and animal activity, while collecting multiple blood samples for drug analysis. CONCLUSION The combination of automated blood sampling with cardiovascular telemetry monitoring is a novel capability designed to support safety pharmacology cardiovascular assessment of discovery molecules. By combining telemetry and high-fidelity ABS, the model provides an enhanced PK/PD understanding of drug-induced hemodynamic and electrocardiographic effects of discovery compounds in conscious beagles in the same experimental session. Importantly, the model can reduce the need for a separate pharmacokinetic study (positive reduction 3R impact), reduces compound syntheses requirements, and shorten development timelines. Furthermore, implementation of this approach has also improved animal welfare by reducing the animal handling during a study, thereby reducing stress and associated data artifacts (positive refinement 3R impact).
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Affiliation(s)
- Yevgeniya E Koshman
- AbbVie Inc., 1 North Waukegan Rd., North Chicago, IL 60064, United States of America.
| | - Amanda S Wilsey
- AbbVie Inc., 1 North Waukegan Rd., North Chicago, IL 60064, United States of America
| | - Brandan M Bird
- AbbVie Inc., 1 North Waukegan Rd., North Chicago, IL 60064, United States of America
| | - Sabine Sadilek
- AbbVie Inc., 1 North Waukegan Rd., North Chicago, IL 60064, United States of America
| | - Debra A Weisbecker
- AbbVie Inc., 1 North Waukegan Rd., North Chicago, IL 60064, United States of America
| | - Paige A Ebert
- AbbVie Inc., 1 North Waukegan Rd., North Chicago, IL 60064, United States of America
| | - James S Polakowski
- AbbVie Inc., 1 North Waukegan Rd., North Chicago, IL 60064, United States of America
| | - Gary A Gintant
- AbbVie Inc., 1 North Waukegan Rd., North Chicago, IL 60064, United States of America
| | - Scott W Mittelstadt
- AbbVie Inc., 1 North Waukegan Rd., North Chicago, IL 60064, United States of America
| | - C Michael Foley
- AbbVie Inc., 1 North Waukegan Rd., North Chicago, IL 60064, United States of America
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Mika D, Fischmeister R. Cyclic nucleotide signaling and pacemaker activity. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2021; 166:29-38. [PMID: 34298001 DOI: 10.1016/j.pbiomolbio.2021.07.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 06/21/2021] [Accepted: 07/13/2021] [Indexed: 01/01/2023]
Abstract
The sinoatrial node (SAN) is the natural pacemaker of the heart, producing the electrical impulse that initiates every heart beat. Its activity is tightly controlled by the autonomic nervous system, and by circulating and locally released factors. Neurohumoral regulation of heart rate plays a crucial role in the integration of vital functions and influences behavior and ability to respond to changing environmental conditions. At the cellular level, modulation of SAN activity occurs through intracellular signaling pathways involving cyclic nucleotides: cyclic AMP (cAMP) and cyclic GMP (cGMP). In this Review, dedicated to Professor Dario DiFrancesco and his accomplishements in the field of cardiac pacemaking, we summarize all findings on the role of cyclic nucleotides signaling in regulating the key actors of cardiac automatism, and we provide an up-to-date review on cAMP- and cGMP-phosphodiesterases (PDEs), compellingly involved in this modulation.
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Affiliation(s)
- Delphine Mika
- Université Paris-Saclay, Inserm, UMR-S, 1180, Châtenay-Malabry, France.
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Gao L, Wang Y, Zhang W, Zhu X, Gao Q, Xiao Y, Chen K, Liu F, Chen L. Novel in vivo and in vitro mechanisms of positive inotropic effect of atractylodin. Clin Exp Pharmacol Physiol 2021; 48:686-696. [PMID: 32931027 DOI: 10.1111/1440-1681.13406] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 09/01/2020] [Accepted: 09/06/2020] [Indexed: 11/28/2022]
Abstract
This study was to investigate the inotropic effect of atractylodin and its underlying mechanism. The cardiac pressure-volume loop (P-V loop), Langendroff-perfused isolated rat heart, patch-clamp, Ca2+ transient and western blot techniques were used. The results demonstrated that atractylodin (3 mg/kg, ip) remarkably increased the left ventricular stroke work, cardiac output, stroke volume, heart rate, ejection fraction, end-systolic pressure, peak rates of rise and fall of left ventricular pressures (+dP/dtmax , -dP/dtmax ), the slopes of end-systolic pressure-volume relationship (also named as end-systolic elastance, Ees) and reducing end-systolic volume and end-diastolic volume in the in vivo rat study. Also, atractylodin (3 mg/kg, ip) significantly decreased diastolic blood pressure and the arterial elastance (Ea) without significant systolic blood pressure change. In addition, atractylodin (0.1, 1, 10 µmol/L) also increased the isolated rat heart left ventricular developed pressure which is the difference between the systolic and diastolic pressure in non-pacing and pacing modes. Furthermore, JMV-2959 (1 μmol/L), a ghrelin receptor unbiased antagonist, blocked the increased left ventricular developed pressure of atractylodin in isolated rat hearts. Finally, atractylodin (5 µmol/L) increased the amplitude of Ca2+ transient by enhancing SERCA2a activity, the sarcoplasmic reticulum Ca2+ content and the phosphorylation of phospholamban at 16-serine. These results demonstrated that atractylodin had a positive inotropic effect by enhancing SERCA2a activity which might be mediated by acting ghrelin receptor in myocardium. In conclusion, atractylodin which had the positive inotropic effect and decreased diastolic blood pressure might serve as an agent for the treatment of heart failure in clinical settings.
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Affiliation(s)
- Li Gao
- Jiangsu key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
- Taizhou Fourth People's Hospital, Taizhou, China
| | - Yuwei Wang
- Jiangsu key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
| | - Wenhui Zhang
- Jiangsu key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
| | - Xiaojia Zhu
- Jiangsu key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
| | - Qianwen Gao
- Jiangsu key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
| | - Yujie Xiao
- Jiangsu key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
| | - Kesu Chen
- Department of Respiratory, Inpatient Wards for Senior Cadres, General Hospital of Eastern Theater Command, PLA, Nanjing, China
| | - Fuming Liu
- First Affiliated Hospital, Nanjing University of Chinese Medicine, Nanjing, China
| | - Long Chen
- Jiangsu key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
- Institute of Chinese Medicine of Taizhou China Medical City, Taizhou, China
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Koshman YE, Wilsey AS, Bird BM, Sadilek S, Weisbecker DA, Ebert PA, Polakowski JS, Gintant GA, Mittelstadt SW, Foley CM. Automated blood sampling in canine telemetry studies: Enabling enhanced assessments of cardiovascular liabilities and safety margins. J Pharmacol Toxicol Methods 2021; 109:107066. [DOI: 10.1016/j.vascn.2021.107066] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 04/02/2021] [Accepted: 04/03/2021] [Indexed: 01/06/2023]
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Colombe AS, Pidoux G. Cardiac cAMP-PKA Signaling Compartmentalization in Myocardial Infarction. Cells 2021; 10:cells10040922. [PMID: 33923648 PMCID: PMC8073060 DOI: 10.3390/cells10040922] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 04/02/2021] [Accepted: 04/13/2021] [Indexed: 02/07/2023] Open
Abstract
Under physiological conditions, cAMP signaling plays a key role in the regulation of cardiac function. Activation of this intracellular signaling pathway mirrors cardiomyocyte adaptation to various extracellular stimuli. Extracellular ligand binding to seven-transmembrane receptors (also known as GPCRs) with G proteins and adenylyl cyclases (ACs) modulate the intracellular cAMP content. Subsequently, this second messenger triggers activation of specific intracellular downstream effectors that ensure a proper cellular response. Therefore, it is essential for the cell to keep the cAMP signaling highly regulated in space and time. The temporal regulation depends on the activity of ACs and phosphodiesterases. By scaffolding key components of the cAMP signaling machinery, A-kinase anchoring proteins (AKAPs) coordinate both the spatial and temporal regulation. Myocardial infarction is one of the major causes of death in industrialized countries and is characterized by a prolonged cardiac ischemia. This leads to irreversible cardiomyocyte death and impairs cardiac function. Regardless of its causes, a chronic activation of cardiac cAMP signaling is established to compensate this loss. While this adaptation is primarily beneficial for contractile function, it turns out, in the long run, to be deleterious. This review compiles current knowledge about cardiac cAMP compartmentalization under physiological conditions and post-myocardial infarction when it appears to be profoundly impaired.
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Wang YW, Gao QW, Xiao YJ, Zhu XJ, Gao L, Zhang WH, Wang RR, Chen KS, Liu FM, Huang HL, Chen L. Bay 60-7550, a PDE2 inhibitor, exerts positive inotropic effect of rat heart by increasing PKA-mediated phosphorylation of phospholamban. Eur J Pharmacol 2021; 901:174077. [PMID: 33798601 DOI: 10.1016/j.ejphar.2021.174077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 03/21/2021] [Accepted: 03/26/2021] [Indexed: 10/21/2022]
Abstract
This study investigated the hemodynamic effect of Bay 60-7550, a phosphodiesterase type 2 (PDE2) inhibitor, in healthy rat hearts both in vivo and ex vivo and its underlying mechanisms. In vivo rat left ventricular pressure-volume loop, Langendorff isolated rat heart, Ca2+ transient of left ventricular myocyte and Western blot experiments were used in this study. The results demonstrated that Bay 60-7550 (1.5 mg/kg, i. p.) increased the in vivo rat heart contractility by enhancing stroke work, cardiac output, stroke volume, end-diastolic volume, heart rate, and ejection fraction. The simultaneous aortic pressure recording indicated that the systolic blood pressure was increased and diastolic blood pressure was decreased by Bay 60-7550. Also, the arterial elastance which is proportional to the peripheral vessel resistance was significantly decreased. Bay 60-7550 (0.001, 0.01, 0.1, 1 μmol/l) also enhanced the left ventricular development pressure in non-paced and paced modes with a decrease of heart rate in non-paced model. Bay 60-7550 (1 μmol/l) increased SERCA2a activity and SR Ca2+ content and reduced SR Ca2+ leak rate. Furthermore, Bay 60-7550 (0.1 μmol/l) increased the phosphorylation of phospholamban at 16-serine without significantly changing the phosphorylation levels of phospholamban at 17-threonine and RyR2. Bay 60-7550 increased the rat heart contractility and reduced peripheral arterial resistance may be mediated by increasing the phosphorylation of phospholamban and dilating peripheral vessels. PDE2 inhibitors which result in a positive inotropic effect and a decrease in peripheral resistance might serve as a target for developing agents for the treatment of heart failure in clinical settings.
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Affiliation(s)
- Yu-Wei Wang
- National Standard Laboratory of Pharmacology for Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Qian-Wen Gao
- National Standard Laboratory of Pharmacology for Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Yu-Jie Xiao
- National Standard Laboratory of Pharmacology for Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Xiao-Jia Zhu
- National Standard Laboratory of Pharmacology for Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Li Gao
- National Standard Laboratory of Pharmacology for Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Wen-Hui Zhang
- National Standard Laboratory of Pharmacology for Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Rong-Rong Wang
- National Standard Laboratory of Pharmacology for Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Ke-Su Chen
- School of Medicine, Nanjing University, Nanjing 210093, China
| | - Fu-Ming Liu
- First Affiliated Hospital, Nanjing University of Chinese Medicine, Nanjing 210029, China
| | - Hui-Li Huang
- Department of Clinical Pharmacy, No. 900 Hospital of the Chinese PLA Joint Support Forces, Fuzhou 350000, China
| | - Long Chen
- National Standard Laboratory of Pharmacology for Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China; Institute of Chinese Medicine of Taizhou China Medical City, Double Tower, China Medical City, Taizhou 225300, China.
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Zhao J, Wang Y, Gao J, Jing Y, Xin W. Berberine Mediated Positive Inotropic Effects on Rat Hearts via a Ca 2+-Dependent Mechanism. Front Pharmacol 2020; 11:821. [PMID: 32581792 PMCID: PMC7289965 DOI: 10.3389/fphar.2020.00821] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Accepted: 05/19/2020] [Indexed: 11/13/2022] Open
Abstract
Previous studies showed that berberine, an alkaloid from Coptis Chinensis Franch, might exert a positive inotropic effect on the heart. However, the underlying mechanisms were unclear. Here, we reported that berberine at 10–20 µM increased the left ventricular (LV) developed pressure and the maximal rate of the pressure rising, and it increased the maximal rate of the pressure descending at 20 µM in Langendorff-perfused isolated rat hearts. These effects diminished with the concentration of berberine increasing to 50 µM. In the concentration range of 50–300 µM, berberine increased the isometric tension of isolated left ventricular muscle (LVM) strips with or without electrical stimulations, and it (30–300 µM) also increased the intracellular Ca2+ level in the isolated LV myocytes. The removal of extracellular Ca2+ hindered the berberine-induced increases in the tension of LVM strips and the intracellular Ca2+ level of LV myocytes. These suggested that berberine might exert its positive inotropic effects via enhancing Ca2+ influx. The blockade of L-type Ca2+ channels (LTCCs) with nifedipine significantly attenuated 300 μM berberine-induced tension increase in LVM strips but not the increase in the intracellular Ca2+ level. Berberine (300 μM) further increased the LVM tension following the treatment with the LTCC opener FPL-64716 (10 μM), indicating an LTCC-independent effect of berberine. Lowering extracellular Na+ attenuated the berberine-induced increases in both the tension of LVM strips and the intracellular Ca2+ level of LV myocytes. In conclusion, berberine might exert a positive inotropic effect on the isolated rat heart by enhancing the Ca2+ influx in LV myocytes; these were extracellular Na+-dependent.
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Affiliation(s)
- Junli Zhao
- College of Pharmaceutical Sciences, Southwest University, Chongqing, China
| | - Yaqian Wang
- College of Pharmaceutical Sciences, Southwest University, Chongqing, China
| | - Jie Gao
- College of Pharmaceutical Sciences, Southwest University, Chongqing, China
| | - Yang Jing
- College of Pharmaceutical Sciences, Southwest University, Chongqing, China
| | - Wenkuan Xin
- College of Pharmaceutical Sciences, Southwest University, Chongqing, China
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