1
|
Neumann J, Hofmann B, Dhein S, Gergs U. Role of Dopamine in the Heart in Health and Disease. Int J Mol Sci 2023; 24:ijms24055042. [PMID: 36902474 PMCID: PMC10003060 DOI: 10.3390/ijms24055042] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 02/25/2023] [Accepted: 03/02/2023] [Indexed: 03/08/2023] Open
Abstract
Dopamine has effects on the mammalian heart. These effects can include an increase in the force of contraction, and an elevation of the beating rate and the constriction of coronary arteries. Depending on the species studied, positive inotropic effects were strong, very modest, or absent, or even negative inotropic effects occurred. We can discern five dopamine receptors. In addition, the signal transduction by dopamine receptors and the regulation of the expression of cardiac dopamine receptors will be of interest to us, because this might be a tempting area of drug development. Dopamine acts in a species-dependent fashion on these cardiac dopamine receptors, but also on cardiac adrenergic receptors. We will discuss the utility of drugs that are currently available as tools to understand cardiac dopamine receptors. The molecule dopamine itself is present in the mammalian heart. Therefore, cardiac dopamine might act as an autocrine or paracrine compound in the mammalian heart. Dopamine itself might cause cardiac diseases. Moreover, the cardiac function of dopamine and the expression of dopamine receptors in the heart can be altered in diseases such as sepsis. Various drugs for cardiac and non-cardiac diseases are currently in the clinic that are, at least in part, agonists or antagonists at dopamine receptors. We define the research needs in order to understand dopamine receptors in the heart better. All in all, an update on the role of dopamine receptors in the human heart appears to be clinically relevant, and is thus presented here.
Collapse
Affiliation(s)
- Joachim Neumann
- Institut für Pharmakologie und Toxikologie, Medizinische Fakultät, Martin-Luther-Universität Halle-Wittenberg, 06097 Halle, Germany
- Correspondence: ; Tel.: +49-345-557-1686; Fax: +49-345-557-1835
| | - Britt Hofmann
- Herzchirurgie, Medizinische Fakultät, Martin-Luther-Universität Halle-Wittenberg, 06097 Halle, Germany
| | - Stefan Dhein
- Medizinische Fakultät, Rudolf-Boehm-Institut für Pharmakologie und Toxikologie, Universität Leipzig, 04107 Leipzig, Germany
| | - Ulrich Gergs
- Institut für Pharmakologie und Toxikologie, Medizinische Fakultät, Martin-Luther-Universität Halle-Wittenberg, 06097 Halle, Germany
| |
Collapse
|
2
|
Nakamura S, Numata G, Yamaguchi T, Tokiwa H, Higashikuni Y, Nomura S, Sasano T, Takimoto E, Komuro I. Endoplasmic reticulum stress-activated nuclear factor-kappa B signaling pathway induces the upregulation of cardiomyocyte dopamine D1 receptor in heart failure. Biochem Biophys Res Commun 2022; 637:247-253. [DOI: 10.1016/j.bbrc.2022.11.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Accepted: 11/11/2022] [Indexed: 11/16/2022]
|
3
|
Li H, Wei Y, Xi Y, Jiao L, Wen X, Wu R, Chang G, Sun F, Hao J. DR1-CSE/H 2S pathway upregulates autophagy and inhibits H9C2 cells damage induced by high glucose. Acta Cardiol 2022:1-13. [PMID: 36197015 DOI: 10.1080/00015385.2022.2119663] [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: 11/01/2022]
Abstract
In the cardiovascular system, long-term high glucose (HG) can lead to cardiomyocyte damage. Hydrogen sulfide (H2S) reduces cell autophagy in cardiomyocytes. Dopamine 1 receptors (DR1), a specific binding receptor for dopamine, which has a significant regulatory effect on cardiomyocytes. However, it is unclear whether DR1 inhibits HG-induced cardiomyocyte damage by regulating endogenous H2S production and the level of cell autophagy. The present data indicated that the expression of DR1 and cystathionine-γ-lyase (CSE, a key enzyme for endogenous H2S production) and H2S content were significantly reduced in HG-induced cardiomyocytes, which was reversed by SKF38393 (an agonist of DR1). NaHS (an exogenous H2S donor) only increased H2S content and the expression of CSE with no effect on DR1 expression. HG reduced cell viability, the expression of Bcl-2 and Beclin1, the production of autophagosomes and LC3 II/I ratio and increased the cell apoptotic ratio, the expression of cleaved caspase-3, cleaved caspase-9, cytochrome c, P62, and p-mTOR/t-mTOR ratio. SKF38393 and NaHS reversed the effects of HG. PPG (an inhibitor of CSE) and 3MA (an inhibitor of autophagy) abolished the beneficial effect of SKF38393. In addition, AICAR (an agonist of AMPK) and Rapamycin (an inhibitor of mTOR) increased the production of autophagosomes but decreased the p-mTOR/t-mTOR ratio, which was similar to the effects of SKF38393 and 3MA. Our findings suggest that DR1 reduces the HG-induced cardiomyocyte damage via up-regulating the CSE/H2S pathway, which increases cell autophagy by inhibiting the activation of mTOR.
Collapse
Affiliation(s)
- Hongzhu Li
- School of Medicine, Xiamen University, Xiamen, China.,Department of Pathophysiology, Harbin Medical University, Harbin, China
| | - Yaxin Wei
- Department of Pathophysiology, Harbin Medical University, Harbin, China.,Department of Pathology, Northeast Yunnan Regional Central Hospital, Zhaotong, China
| | - Yuxin Xi
- Department of Pathophysiology, Harbin Medical University, Harbin, China
| | - Lijie Jiao
- School of Medicine, Xiamen University, Xiamen, China
| | - Xin Wen
- Department of Pathophysiology, Harbin Medical University, Harbin, China
| | - Ren Wu
- Department of Pathophysiology, Harbin Medical University, Harbin, China
| | - Guiquan Chang
- Department of Pathophysiology, Harbin Medical University, Harbin, China
| | - Fengqi Sun
- Department of Pathophysiology, Harbin Medical University, Harbin, China
| | - Jinghui Hao
- Department of Pathophysiology, Harbin Medical University, Harbin, China
| |
Collapse
|
4
|
Li H, Wu R, Xi Y, Li H, Chang G, Sun F, Wei C, Jiao L, Wen X, Zhang G, Zaid A, Hao J. Dopamine 1 receptors inhibit apoptosis via activating CSE/H 2 S pathway in high glucose-induced vascular endothelial cells. Cell Biol Int 2022; 46:1098-1108. [PMID: 35293655 DOI: 10.1002/cbin.11794] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 01/10/2022] [Accepted: 03/07/2022] [Indexed: 11/08/2022]
Abstract
High glucose (HG) induced dysfunction of vascular endothelial cells plays a crucial role in the development of diabetic vascular complications. Inhibition of cystathionine γ-synthase/hydrogen sulfide (CSE/H2 S) pathway is one of the causes of vascular endothelial cells injury induced by HG. Dopamine D1 receptors (DR1) are widely expressed and regulate important physiological functions in the vascular system. However, the effect of DR1 inhibition on HG-induced vascular endothelial apoptosis by regulating CSE/H2 S pathway is unclear. Therefore, we aimed to determine if DR1 can regulate the CSE/H2 S pathway and the effect of DR1 on HG-induced apoptosis in human umbilical vein endothelial cells (HUVECs). In this study, we found that HG treatment significantly decreased the expression of DR1 and CSE and the endogenous content of H2 S, DR1 agonist SKF 38393 reversed these effect, while NaHS only increased CSE expression and the endogenous H2 S production and had no effect on DR1 expression. Meanwhile, HG significantly raised intracellular calcium concentration ([Ca2+ ]i ), SKF 38393 further increased HG-induced [Ca2+ ]i . In addition, HG increased LDH activity, MDA and ROS contents, apoptotic rate, the expression of cleaved caspase-3, -9 and Cytochrome C and the activity of phosphorylated-IκBα (p-IκBα) and phosphorylated-NF-κB (p-NF-κB), reduced cell viability, SOD activity and Bcl-2 expressions. SKF 38393 and NaHS markedly reversed the effect of HG. The effect of SKF 38393 was similar to NAC (an inhibitor of oxidative stress) or PDTC (a NF-kB inhibitor). Taken together, DR1 up-regulate CSE/H2 S pathway by increasing [Ca2+ ]i , which inhibits HG-induced apoptosis via down-regulating NF-κB/IκBα pathway in vascular endothelial cells. This article is protected by copyright. All rights reserved.
Collapse
Affiliation(s)
- Hongzhu Li
- School of Medicine, Xiamen University, Xiamen, 361100, Fujian, China.,Department of Pathophysiology, Harbin Medical University, Harbin, 150081, Heilongjiang, China
| | - Ren Wu
- Department of Pathophysiology, Harbin Medical University, Harbin, 150081, Heilongjiang, China
| | - Yuxin Xi
- Department of Pathophysiology, Harbin Medical University, Harbin, 150081, Heilongjiang, China
| | - Hongxia Li
- Department of Pathophysiology, Harbin Medical University, Harbin, 150081, Heilongjiang, China
| | - Guiquan Chang
- Department of Pathophysiology, Harbin Medical University, Harbin, 150081, Heilongjiang, China
| | - Fengqi Sun
- Department of Pathophysiology, Harbin Medical University, Harbin, 150081, Heilongjiang, China
| | - Can Wei
- Department of Pathophysiology, Harbin Medical University, Harbin, 150081, Heilongjiang, China
| | - Lijie Jiao
- School of Medicine, Xiamen University, Xiamen, 361100, Fujian, China
| | - Xin Wen
- Department of Pathophysiology, Harbin Medical University, Harbin, 150081, Heilongjiang, China
| | - Gensheng Zhang
- Department of Critical Care Medicine, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310009, Zhejiang, China
| | - Altaany Zaid
- Faculty of Medicine, Yarmouk University, Irbid, Jordan
| | - Jinghui Hao
- Department of Pathophysiology, Harbin Medical University, Harbin, 150081, Heilongjiang, China
| |
Collapse
|
5
|
Zhong R, Zhang F, Yang Z, Li Y, Xu Q, Lan H, Lang S, Cyganek L, Burgermeister E, El-Battrawy I, Zhou X, Akin I, Borggrefe M. Regulation of Ion Channel Function in Human-Induced Pluripotent Stem Cell-Derived Cardiomyocytes by Cancer Cell Secretion Through DNA Methylation. Front Cardiovasc Med 2022; 9:839104. [PMID: 35265687 PMCID: PMC8899119 DOI: 10.3389/fcvm.2022.839104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 01/28/2022] [Indexed: 12/24/2022] Open
Abstract
Background Cardiac dysfunction including arrhythmias appear frequently in patients with cancers, which are expected to be caused mainly by cardiotoxic effects of chemotherapy. Experimental studies investigating the effects of cancer cell secretion without chemotherapy on ion channel function in human cardiomyocytes are still lacking. Methods The human-induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs) generated from three healthy donors were treated with gastrointestinal (GI) cancer (AGS and SW480 cells) medium for 48 h. The qPCR, patch-clamp, western blotting, immunostaining, dot blotting, bisulfite sequence, and overexpression of the ten-eleven translocation (TET) enzyme were performed for the study. Results After treated with cancer cell secretion, the maximum depolarization velocity and the action potential amplitude were reduced, the action potential duration prolonged, peak Na+ current, and the transient outward current were decreased, late Na+ and the slowly activating delayed rectifier K+ current were increased. Changes of mRNA and protein level of respective channels were detected along with altered DNA methylation level in CpG island in the promoter regions of ion channel genes and increased protein levels of DNA methyltransferases. Phosphoinositide 3-kinase (PI3K) inhibitor attenuated and transforming growth factor-β (TGF-β) mimicked the effects of cancer cell secretion. Conclusions GI cancer cell secretion could induce ion channel dysfunction, which may contribute to occurrence of arrhythmias in cancer patients. The ion channel dysfunction could result from DNA methylation of ion channel genes via activation of TGF-β/PI3K signaling. This study may provide new insights into pathogenesis of arrhythmia in cancer patients.
Collapse
Affiliation(s)
- Rujia Zhong
- First Department of Medicine, Medical Faculty Mannheim, University Medical Centre Mannheim (UMM), University of Heidelberg, Mannheim, Germany
| | - Feng Zhang
- First Department of Medicine, Medical Faculty Mannheim, University Medical Centre Mannheim (UMM), University of Heidelberg, Mannheim, Germany
| | - Zhen Yang
- First Department of Medicine, Medical Faculty Mannheim, University Medical Centre Mannheim (UMM), University of Heidelberg, Mannheim, Germany
| | - Yingrui Li
- First Department of Medicine, Medical Faculty Mannheim, University Medical Centre Mannheim (UMM), University of Heidelberg, Mannheim, Germany
| | - Qiang Xu
- First Department of Medicine, Medical Faculty Mannheim, University Medical Centre Mannheim (UMM), University of Heidelberg, Mannheim, Germany
| | - Huan Lan
- Key Laboratory of Medical Electrophysiology of Ministry of Education and Medical Electrophysiological Key Laboratory of Sichuan Province, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, China
| | - Siegfried Lang
- First Department of Medicine, Medical Faculty Mannheim, University Medical Centre Mannheim (UMM), University of Heidelberg, Mannheim, Germany
- DZHK (German Center for Cardiovascular Research), Partner Site, Mannheim, Germany
| | - Lukas Cyganek
- Stem Cell Unit, Clinic for Cardiology and Pneumology, University Medical Center Göttingen, Göttingen, Germany
- DZHK (German Center for Cardiovascular Research), Partner Site, Göttingen, Germany
| | - Elke Burgermeister
- Second Department of Medicine, Faculty of Medicine, University Medical Centre Mannheim (UMM), University of Heidelberg, Mannheim, Germany
| | - Ibrahim El-Battrawy
- First Department of Medicine, Medical Faculty Mannheim, University Medical Centre Mannheim (UMM), University of Heidelberg, Mannheim, Germany
- DZHK (German Center for Cardiovascular Research), Partner Site, Mannheim, Germany
| | - Xiaobo Zhou
- First Department of Medicine, Medical Faculty Mannheim, University Medical Centre Mannheim (UMM), University of Heidelberg, Mannheim, Germany
- Key Laboratory of Medical Electrophysiology of Ministry of Education and Medical Electrophysiological Key Laboratory of Sichuan Province, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, China
- DZHK (German Center for Cardiovascular Research), Partner Site, Mannheim, Germany
- *Correspondence: Xiaobo Zhou
| | - Ibrahim Akin
- First Department of Medicine, Medical Faculty Mannheim, University Medical Centre Mannheim (UMM), University of Heidelberg, Mannheim, Germany
- DZHK (German Center for Cardiovascular Research), Partner Site, Mannheim, Germany
| | - Martin Borggrefe
- First Department of Medicine, Medical Faculty Mannheim, University Medical Centre Mannheim (UMM), University of Heidelberg, Mannheim, Germany
- DZHK (German Center for Cardiovascular Research), Partner Site, Mannheim, Germany
| |
Collapse
|
6
|
Li H, Sun F, Bai S, Chang G, Wu R, Wei Y, Wen X, Xi Y, Hao J, Zaid A. The DR1‑CSE/H 2S system inhibits renal fibrosis by downregulating the ERK1/2 signaling pathway in diabetic mice. Int J Mol Med 2022; 49:7. [PMID: 34779492 PMCID: PMC8651227 DOI: 10.3892/ijmm.2021.5062] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 11/01/2021] [Indexed: 11/16/2022] Open
Abstract
Glomerular mesangial cell (MC) proliferation and extracellular matrix deposition are the main pathological changes in diabetic nephropathy. Hydrogen sulfide (H2S) inhibits the proliferation of MCs. Dopamine 1 receptors (DR1) are expressed in MCs and serve important physiological roles. However, it is unclear whether DR1 activation inhibits MC proliferation by increasing endogenous H2S. The present study found that the production of H2S and the expression of DR1 and cystathionine‑γ‑lyase (CSE) were decreased in the renal tissues of diabetic mice and high glucose (HG)‑induced MCs. SKF38393 (a DR1 agonist) increased the production of H2S and the expression of DR1 and CSE and NaHS (an exogenous H2S donor) only increased H2S production and CSE expression but not DR1 expression. HG increased the thickness of the glomerular basement membrane, cell viability and proliferation, the expression of cyclin D1, PCNA, collagen 1 and α‑smooth muscle actin and the activity of phosphorylated ERK1/2 and decreased the expression of P21 and MMP9. SKF38393 and NaHS reversed the effects of HG. PPG (a CSE inhibitor) abolished the beneficial effects of SKF38393. The beneficial effects of SKF38393 were similar to those of PD98059 (an ERK1/2 inhibitor). Taken together, the findings suggested that the DR1‑CSE/H2S pathway activation attenuated diabetic MC proliferation and extracellular matrix deposition by downregulating the ERK1/2 signaling pathway.
Collapse
MESH Headings
- 2,3,4,5-Tetrahydro-7,8-dihydroxy-1-phenyl-1H-3-benzazepine/pharmacology
- Animals
- Cell Line
- Cell Proliferation
- Collagen/metabolism
- Cystathionine gamma-Lyase/metabolism
- Diabetes Mellitus, Experimental/metabolism
- Diabetes Mellitus, Experimental/pathology
- Diabetes Mellitus, Type 1/metabolism
- Diabetes Mellitus, Type 1/pathology
- Female
- Fibrosis
- Glucose/pharmacology
- Hydrogen Sulfide/metabolism
- Kidney/metabolism
- Kidney/pathology
- MAP Kinase Signaling System/physiology
- Male
- Mesangial Cells/drug effects
- Mesangial Cells/pathology
- Mice, Inbred C57BL
- Receptors, Dopamine D1/agonists
- Receptors, Dopamine D1/metabolism
- Mice
Collapse
Affiliation(s)
- Hongzhu Li
- Department of Pathophysiology, School of Medicine, Xiamen University, Xiamen, Fujian 361100, P.R. China
- Department of Pathophysiology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Fengqi Sun
- Department of Pathophysiology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Shuzhi Bai
- Department of Pathophysiology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Guiquan Chang
- Department of Pathophysiology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Ren Wu
- Department of Pathophysiology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Yaxin Wei
- Department of Pathophysiology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Xin Wen
- Department of Pathophysiology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Yuxin Xi
- Department of Pathophysiology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Jinghui Hao
- Department of Pathophysiology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Altaany Zaid
- Faculty of Medicine, Yarmouk University, Irbid 21163, Jordan
| |
Collapse
|
7
|
Xi Y, Wen X, Zhang Y, Jiao L, Bai S, Shi S, Chang G, Wu R, Sun F, Hao J, Li H. DR1 Activation Inhibits the Proliferation of Vascular Smooth Muscle Cells through Increasing Endogenous H 2S in Diabetes. Aging Dis 2022; 13:910-926. [PMID: 35656112 PMCID: PMC9116912 DOI: 10.14336/ad.2021.1104] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Accepted: 11/04/2021] [Indexed: 11/09/2022] Open
Abstract
Tissue ischemia and hypoxia caused by the abnormal proliferation of smooth muscle cells (SMCs) in the diabetic state is an important pathological basis for diabetic microangiopathy. Studies in recent years have shown that the chronic complications of diabetes are related to the decrease of endogenous hydrogen sulfide (H2S) in diabetic patients, and it has been proven that H2S can inhibit the proliferation of vascular SMCs (VSMCs). Our study showed that the endogenous H2S content and the expression of cystathionine gamma-lyase (CSE), which is the key enzyme of H2S production, were decreased in arterial SMCs of diabetic mice. The expression of PCNA and Cyclin D1 was increased, and the expression of p21 was decreased in the diabetic state. After administration of dopamine 1-like receptors (DR1) agonist SKF38393 and exogenous H2S donor NaHS, the expression of CSE was increased and the change in proliferation-related proteins caused by diabetes was reversed. It was further verified by cell experiments that SKF38393 activated calmodulin (CaM) by increasing the intracellular calcium ([Ca2+]i) concentration, which activated the CSE/H2S pathway, enhancing the H2S content in vivo. We also found that SKF38393 and NaHS inhibited insulin-like growth factor-1 (IGF-1)/IGF-1R and heparin-binding EGF-like growth factor (HB-EGF)/EGFR, as well as their downstream PI3K/Akt, JAK2/STAT3 and ERK1/2 pathways. Taken together, our results suggest that DR1 activation up-regulates the CSE/H2S system by increasing Ca2+-CaM binding, which inhibits the IGF-1/IGF-1R and HB-EGF/EGFR pathways, thereby decreasing their downstream PI3K/Akt, JAK2/STAT3 and ERK1/2 pathways to achieve the effect of inhibiting HG-induced VSMCs proliferation.
Collapse
Affiliation(s)
- Yuxin Xi
- Department of Pathophysiology, Harbin Medical University, Harbin, Heilongjiang, China.
| | - Xin Wen
- Department of Pathophysiology, Harbin Medical University, Harbin, Heilongjiang, China.
| | - Yuanzhou Zhang
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Lijie Jiao
- School of Medicine, Xiamen University, Xiamen, Fujian, China.
| | - Shuzhi Bai
- Department of Pathophysiology, Harbin Medical University, Harbin, Heilongjiang, China.
| | - Sa Shi
- Department of Pathophysiology, Harbin Medical University, Harbin, Heilongjiang, China.
| | - Guiquan Chang
- Department of Pathophysiology, Harbin Medical University, Harbin, Heilongjiang, China.
| | - Ren Wu
- Department of Pathophysiology, Harbin Medical University, Harbin, Heilongjiang, China.
| | - Fengqi Sun
- Department of Pathophysiology, Harbin Medical University, Harbin, Heilongjiang, China.
| | - Jinghui Hao
- Department of Pathophysiology, Harbin Medical University, Harbin, Heilongjiang, China.
| | - Hongzhu Li
- Department of Pathophysiology, Harbin Medical University, Harbin, Heilongjiang, China.
- School of Medicine, Xiamen University, Xiamen, Fujian, China.
- Correspondence should be addressed to: Dr. Hongzhu Li, School of Medicine, Xiamen University, Xiamen, Fujian, China. .
| |
Collapse
|
8
|
Wen X, Xi Y, Zhang Y, Jiao L, Shi S, Bai S, Sun F, Chang G, Wu R, Hao J, Li H. DR1 activation promotes vascular smooth muscle cell apoptosis via up-regulation of CSE/H 2 S pathway in diabetic mice. FASEB J 2021; 36:e22070. [PMID: 34859931 DOI: 10.1096/fj.202101455r] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 11/07/2021] [Accepted: 11/12/2021] [Indexed: 12/20/2022]
Abstract
The important role of hydrogen sulfide (H2 S) as a novel gasotransmitter in inhibiting proliferation and promoting apoptosis of vascular smooth muscle cells (VSMCs) has been widely recognized. The dopamine D1 receptor (DR1), a G protein coupled receptor, inhibits atherosclerosis by suppressing VSMC proliferation. However, whether DR1 contributes to VSMC apoptosis via the induction of endogenous H2 S in diabetic mice is unclear. Here, we found that hyperglycemia decreased the expressions of DR1 and cystathionine-γ-lyase (CSE, a key enzyme for endogenous H2 S production) and reduced endogenous H2 S generation in mouse arteries and cultured VSMCs. DR1 agonist SKF38393 increased DR1 and CSE expressions and stimulated endogenous H2 S generation. Sodium hydrosulfide (NaHS, a H2 S donor) increased CSE expressions and H2 S generation but had no effect on DR1 expression. In addition, high glucose (HG) increased VSMC apoptosis, up-regulated IGF-1-IGF-1R and HB-EGF-EGFR, and stimulated ERK1/2 and PI3K-Akt pathways. Overexpression of DR1, the addition of SKF38393 or supply of NaHS further promoted VSMC apoptosis and down-regulated the above pathways. Knock out of CSE or the addition of the CSE inhibitor poly propylene glycol diminished the effect of SKF38393. Moreover, calmodulin (CaM) interacted with CSE in VSMCs; HG increased intracellular Ca2+ concentration and induced CaM expression, further strengthened the interaction of CaM with CSE in VSMCs, which were further enhanced by SKF38393. CaM inhibitor W-7, inositol 1,4,5-trisphosphate (IP3 ) inhibitor 2-APB, or ryanodine receptor inhibitor tetracaine abolished the stimulatory effect of SKF38393 on CaM expression and intracellular Ca2+ concentration. Taken together, these results suggest that DR1 up-regulates CSE/H2 S signaling by inducing the Ca2+ -CaM pathway followed by down-regulations of IGF-1-IGF-1R and HB-EGF-EGFR and their downstream ERK1/2 and PI3K-Akt, finally promoting the apoptosis of VSMCs in diabetic mice.
Collapse
Affiliation(s)
- Xin Wen
- Department of Pathophysiology, Harbin Medical University, Harbin, China
| | - Yuxin Xi
- Department of Pathophysiology, Harbin Medical University, Harbin, China
| | - Yuanzhou Zhang
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Lijie Jiao
- School of Medicine, Xiamen University, Xiamen, China
| | - Sa Shi
- Department of Pathophysiology, Harbin Medical University, Harbin, China
| | - Shuzhi Bai
- Department of Pathophysiology, Harbin Medical University, Harbin, China
| | - Fengqi Sun
- Department of Pathophysiology, Harbin Medical University, Harbin, China
| | - Guiquan Chang
- Department of Pathophysiology, Harbin Medical University, Harbin, China
| | - Ren Wu
- Department of Pathophysiology, Harbin Medical University, Harbin, China
| | - Jinghui Hao
- Department of Pathophysiology, Harbin Medical University, Harbin, China
| | - Hongzhu Li
- Department of Pathophysiology, Harbin Medical University, Harbin, China.,School of Medicine, Xiamen University, Xiamen, China
| |
Collapse
|
9
|
Zhang L, Xu AL, Yang S, Zhao BS, Wang T. In vitro screening and toxic mechanism exploring of leading components with potential hepatotoxicity of Herba Epimedii extracts. Toxicol In Vitro 2019; 62:104660. [PMID: 31629066 DOI: 10.1016/j.tiv.2019.104660] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 09/11/2019] [Accepted: 09/19/2019] [Indexed: 11/15/2022]
Abstract
Herba Epimedii is a famous Chinese edible herb, and due to its potential hepatotoxic effects, the safety associated with this herb has attracted a great deal of attention. In this study, the components of four types of the Herba Epimedii extracts were identified by HPLC-MS/MS. Among these components, 11 components that were present in all four extracts and could be obtained as reference substances were evaluated for their ability of cytotoxicity in HL-7702 and HepG2 cells, resulting in the identification of icarisid I and sagittatoside A as the most relevant with respect to the toxicity of the extracts. The targeted toxicological effects were further investigated using a series of correlated biological indicators to elucidate potentially hepatotoxic mechanisms. The results showed that the extracts and the selected compounds had varying degrees of influence on the leakage of ALT, AST and LDH; the activity of SOD, GSH and MDA; the increase in intercellular ROS; and the decrease in MMP. Among the tested substances, the ethanol extracts exhibited stronger hepatotoxicity, with icarisid I and sagittatoside A correlating with this toxic effect, and the hepatoxic mechanisms of which may be associated with damaged cell structure, increased oxidative stress and induction of apoptosis.
Collapse
Affiliation(s)
- Lin Zhang
- Beijing Research Institute of Chinese Medicine, Beijing University of Chinese Medicine, Chaoyang District, Beijing 10029, People's Republic of China
| | - An-Long Xu
- School of Life Science, Beijing University of Chinese Medicine, Chaoyang District, Beijing 10029, People's Republic of China.
| | - Song Yang
- Beijing Research Institute of Chinese Medicine, Beijing University of Chinese Medicine, Chaoyang District, Beijing 10029, People's Republic of China
| | - Bao-Sheng Zhao
- Beijing Research Institute of Chinese Medicine, Beijing University of Chinese Medicine, Chaoyang District, Beijing 10029, People's Republic of China
| | - Ting Wang
- Beijing Research Institute of Chinese Medicine, Beijing University of Chinese Medicine, Chaoyang District, Beijing 10029, People's Republic of China.
| |
Collapse
|
10
|
Dopamine outside the brain: The eye, cardiovascular system and endocrine pancreas. Pharmacol Ther 2019; 203:107392. [PMID: 31299315 DOI: 10.1016/j.pharmthera.2019.07.003] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 07/05/2019] [Indexed: 01/11/2023]
Abstract
Dopamine (DA) and DA receptors (DR) have been extensively studied in the central nervous system (CNS), but their role in the periphery is still poorly understood. Here we summarize data on DA and DRs in the eye, cardiovascular system and endocrine pancreas, three districts where DA and DA-related drugs have been studied and the expression of DR documented. In the eye, DA modulates ciliary blood flow and aqueous production, which impacts on intraocular pressure and glaucoma. In the cardiovascular system, DA increases blood pressure and heart activity, mostly through a stimulation of adrenoceptors, and induces vasodilatation in the renal circulation, possibly through D1R stimulation. In pancreatic islets, beta cells store DA and co-release it with insulin. D1R is mainly expressed in beta cells, where it stimulates insulin release, while D2R is expressed in both beta and delta cells (in the latter at higher level), where it inhibits, respectively, insulin and somatostatin release. The formation of D2R-somatostatin receptor 5 heteromers (documented in the CNS), might add complexity to the system. DA may exert both direct autocrine effects on beta cells, and indirect paracrine effects through delta cells and somatostatin. Bromocriptine, an FDA approved drug for diabetes, endowed with both D1R (antagonistic) and D2R (agonistic) actions, may exert complex effects, resulting from the integration of direct effects on beta cells and paracrine effects from delta cells. A full comprehension of peripheral DA signaling deserves further studies that may generate innovative therapeutic drugs to manage conditions such as glaucoma, cardiovascular diseases and diabetes.
Collapse
|
11
|
Gao J, Gao F. Dopamine D1 receptors induce apoptosis of osteosarcoma cells via changes of MAPK pathway. Clin Exp Pharmacol Physiol 2018; 44:1166-1168. [PMID: 28699280 DOI: 10.1111/1440-1681.12814] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 07/02/2017] [Accepted: 07/03/2017] [Indexed: 11/30/2022]
Abstract
This study explored the effects and mechanisms of dopamine D1 receptors (DR1) activation on the apoptosis of osteosarcoma cells (OS732).The DR1 agonist SKF-38393 decreased the viability of OS732 cells and increased their rate of apoptosis, whereas the DR1 antagonist SCH-23390 abolished the effects of SKF-38393. In OS732 cells, overexpression of DR1 increased the rate of apoptosis, caspase-9 and -3 expression, and the release of cytochrome c (Cyt c), reduced Bcl-2 expression, inhibited extracellular signal-regulated kinase 1/2 (ERK1/2) phosphorylation, and induced phosphorylation of p38 mitogen-activated protein kinase (p38 MAPK) and c-Jun N-terminal kinase (JNK). These results suggest that activation of DR1 induces osteosarcoma cell apoptosis via changes to the MAPK pathway.
Collapse
Affiliation(s)
- Jun Gao
- Department of Orthopeadic Surgery, The First Hospital of Harbin, Harbin, China
| | - Feng Gao
- Department of Orthopaedic Surgery of Emergency, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| |
Collapse
|
12
|
Zhang P, Hu C, Li Y, Wang Y, Gao L, Lu K, Chang G, Li Y, Qin S, Zhang D. Vangl2 is essential for myocardial remodeling activated by Wnt/JNK signaling. Exp Cell Res 2018; 365:33-45. [PMID: 29454802 DOI: 10.1016/j.yexcr.2018.02.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Revised: 02/07/2018] [Accepted: 02/14/2018] [Indexed: 01/25/2023]
Abstract
The Wnt/JNK pathway, responsible for tissue polarity in cardiogenesis in vertebrates, has been shown to play numerous roles during differentiation and development of cardiac myocytes. Van Gogh-like-2 (Vangl2) is a core component that regulates the induction of polarized cellular and tissue morphology during animal development. However, little is known about Wnt/JNK signaling pathway in the process of myocardial remodeling. In present study, we found that activation of Wnt/JNK signaling by Wnt5a stimulates enlargement of cardiomyocyte surface area. The hypertrophic features were inhibited in Vangl2 depleted cells. Meanwhile, Wnt/JNK activation induced cytoskeleton rearrangement but failed to activate these effects in cells lacking Vangl2. Moreover, Wnt/JNK activation significantly increased the cell apoptosis by mediating the mitochondrial permeability transition pore (mPTP) dysfunction, whereas knockdown of Vangl2 partly reversed these effects. These results suggest that activation of Wnt/JNK signaling stimulates myocardial remodeling (cell morphological changes, apoptosis and mitochondrial dysfunction), in which Vangl2 may play an essential role.
Collapse
Affiliation(s)
- Peng Zhang
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, No. 1 Yixueyuan Road, Yuzhong District, Chongqing 400016, PR China; Center for Perinatal Biology, Division of Pharmacology, Department of Basic Sciences, Loma Linda University School of Medicine, Loma Linda, CA 92350, USA
| | - Chunxiao Hu
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, No. 1 Yixueyuan Road, Yuzhong District, Chongqing 400016, PR China
| | - Yongyong Li
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, No. 1 Yixueyuan Road, Yuzhong District, Chongqing 400016, PR China
| | - Ying Wang
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, No. 1 Yixueyuan Road, Yuzhong District, Chongqing 400016, PR China
| | - Lei Gao
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, No. 1 Yixueyuan Road, Yuzhong District, Chongqing 400016, PR China
| | - Kai Lu
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, No. 1 Yixueyuan Road, Yuzhong District, Chongqing 400016, PR China
| | - Guanglei Chang
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, No. 1 Yixueyuan Road, Yuzhong District, Chongqing 400016, PR China
| | - Yong Li
- Center for Perinatal Biology, Division of Pharmacology, Department of Basic Sciences, Loma Linda University School of Medicine, Loma Linda, CA 92350, USA
| | - Shu Qin
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, No. 1 Yixueyuan Road, Yuzhong District, Chongqing 400016, PR China
| | - Dongying Zhang
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, No. 1 Yixueyuan Road, Yuzhong District, Chongqing 400016, PR China.
| |
Collapse
|
13
|
Gao J, Zhang C, Gao F, Li H. The effect and mechanism of dopamine D1 receptors on the proliferation of osteosarcoma cells. Mol Cell Biochem 2017; 430:31-36. [PMID: 28181134 DOI: 10.1007/s11010-017-2951-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Accepted: 01/17/2017] [Indexed: 12/19/2022]
Abstract
The physiological and pathological roles of dopamine D1 receptors (DR1) in the regulation of functions in tissues and organs have been recognized. However, whether DR1 are expressed in the osteosarcoma cells and inhibit the proliferation of these cells is unknown. In the present study, we found that DR1 were expressed in the osteosarcoma cells (OS732 cells). SKF-38393 (DR1 agonist) and the overexpression of DR1 decreased the proliferation of OS732 cells; SCH-23390 (DR1 antagonist) and the knockdown of DR1 increased the proliferation of OS732 cells, and both SCH-23390 and the knockdown of DR1 abolished the effect of SKF-38393 on the proliferation of OS732 cells. In addition, SKF-38393 down-regulated the phosphorylation of ERK1/2, PI3K, and Akt; SCH-23390 up-regulated the phosphorylation of ERK1/2, PI3K, and Akt, and SCH-23390 cancelled the effect of SKF-38393. The effect of SKF-38393 on the phosphorylation of ERK1/2, PI3K, and Akt and the proliferation of OS732 cells was similar to PD98059 (an ERK inhibitor) or LY294002 (a PI3K inhibitor), respectively. In conclusion, our results suggest that DR1 are expressed in the osteosarcoma cells and inhibit the proliferation of osteosarcoma cells by the down-regulation of the ERK1/2 and PI3K-Akt pathways. These findings provide a novel target for the treatment of the osteosarcoma.
Collapse
Affiliation(s)
- Jun Gao
- Department of Orthopeadic Surgery, The First Hospital of Harbin, Harbin, 150010, China
| | - Chao Zhang
- Department of Emergency, Heilongjiang Provincial Hospital, Harbin, 150036, China
| | - Feng Gao
- Department of Orthopaedic Surgery of Emergency, The Second Affiliated Hospital of Harbin Medical University, Harbin, 150081, China
| | - Hongzhu Li
- Department of Pathophysiology, Harbin Medical University, Baojian Road, Harbin, 150081, China.
| |
Collapse
|
14
|
Li H, Mani S, Wu L, Fu M, Shuang T, Xu C, Wang R. The interaction of estrogen and CSE/H 2S pathway in the development of atherosclerosis. Am J Physiol Heart Circ Physiol 2016; 312:H406-H414. [PMID: 27986657 DOI: 10.1152/ajpheart.00245.2016] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2016] [Revised: 12/05/2016] [Accepted: 12/07/2016] [Indexed: 12/24/2022]
Abstract
Both estrogen and hydrogen sulfide (H2S) have been shown to inhibit the development of atherosclerosis. We previously reported that cystathionine γ-lyase knockout (CSE-KO) male mice develop atherosclerosis earlier than male wild-type (WT) mice. The present study investigated the interaction of CSE/H2S pathway and estrogen on the development of atherosclerosis in female mice. Plasma estrogen levels were significantly lower in female CSE-KO mice than in female WT mice. NaHS treatment had no effect on plasma estrogen levels in both WT and CSE-KO female mice. After CSE-KO and WT female mice were fed with atherogenic diet for 12 wk, plasma lipid levels were significantly increased and triglyceride levels decreased compared with those of control diet-fed mice. Atherogenic diet induced more atherosclerotic lesion, oxidative stress, intracellular adhesion molecule-1 (ICAM-1), and NF-κB in CSE-KO mice than in WT mice. Estrogen treatment of atherogenic diet-fed WT mice attenuated hypercholesterolemia, oxidative stress, ICAM-1 expression, and NF-κB in WT mice but not in atherogenic diet-fed CSE-KO mice. Furthermore, H2S production in both the liver and vascular tissues was enhanced by estrogen in WT mice but not in CSE-KO mice. It is concluded that the antiatherosclerotic effect of estrogen is mediated by CSE-generated H2S. This study provides new insights into the interaction of H2S and estrogen signaling pathways on the regulation of cardiovascular functions.NEW & NOTEWORTHY Female cystathionine γ-lyase (CSE)-knockout mice have significantly lower plasma estrogen levels and more severe early atherosclerotic lesion than female wild-type mice. H2S production in liver and vascular tissues is enhanced by estrogen via its stimulatory effect on CSE activity. The antiatherosclerotic effect of estrogen is mediated by CSE-generated H2S.
Collapse
Affiliation(s)
- Hongzhu Li
- Department of Biology, Lakehead University, Thunder Bay, Ontario, Canada.,Department of Pathophysiology, Harbin Medical University, Harbin, People's Republic of China
| | - Sarathi Mani
- Department of Biology, Lakehead University, Thunder Bay, Ontario, Canada
| | - Lingyun Wu
- Cardiovascular and Metabolic Research Unit, Laurentian University, Sudbury, Ontario, Canada.,Health Sciences North Research Institute, Sudbury, Ontario, Canada; and
| | - Ming Fu
- Cardiovascular and Metabolic Research Unit, Laurentian University, Sudbury, Ontario, Canada
| | - Tian Shuang
- Cardiovascular and Metabolic Research Unit, Laurentian University, Sudbury, Ontario, Canada.,Department of Biology, Laurentian University, Sudbury, Ontario, Canada
| | - Changqing Xu
- Department of Pathophysiology, Harbin Medical University, Harbin, People's Republic of China
| | - Rui Wang
- Department of Biology, Lakehead University, Thunder Bay, Ontario, Canada; .,Cardiovascular and Metabolic Research Unit, Laurentian University, Sudbury, Ontario, Canada.,Department of Biology, Laurentian University, Sudbury, Ontario, Canada
| |
Collapse
|
15
|
Wei C, Li H, Wang Y, Peng X, Shao H, Li H, Bai S, Xu C. Exogenous spermine inhibits hypoxia/ischemia-induced myocardial apoptosis via regulation of mitochondrial permeability transition pore and associated pathways. Exp Biol Med (Maywood) 2016; 241:1505-15. [PMID: 27190250 DOI: 10.1177/1535370216643417] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Accepted: 03/13/2016] [Indexed: 12/19/2022] Open
Abstract
Myocardial infarction (MI) is associated with a high mortality rate, which is attributed to the effects of myocyte loss that occurs as a result of ischemia-induced cell death. Very few therapies can effectively prevent or delay the effects of ischemia. Polyamines (PAs) are polycations required for cell growth and division, and their use may prevent cell loss. The aim of this study was to investigate the relationship between hypoxia/ischemia (H/I)-induced cell apoptosis and PA metabolism and to investigate the ability of spermine to limit H/I injury in cardiomyocytes by blocking the mitochondrial apoptotic pathway. Neonatal rat cardiomyocytes were placed under hypoxic conditions for 24 h after being subjected to 5 μM of spermine as a pretreatment therapy. H/I induced PA catabolism, which was indicated by a 1.3-fold up-regulation of spermidine/spermine N(1)-acetyltransferase expression. Exogenous spermine significantly reduced H/I-induced cell death rate (60 ± 2 to 36 ± 2%) and apoptosis rate (42 ± 2 to 21 ± 2%); it also attenuated lactate dehyodrogenase and creatine kinase leakage (440 ± 13 and 336 ± 16 U/L to 275 ± 15 and 235 ± 13 U/L). Furthermore, it decreases calcium overload (3.8 ± 0.2 to 2.2 ± 0.1 a.u.). Moreover, spermine pretreatment remarkably decreased cytochrome c release from the mitochondria to the cytosol, lowering the expression of cleaved caspase-3 and -9. With spermine pretreatment, there was an increase in Bcl-2 levels and phosphorylation of ERK1/2, phosphoinositide 3-kinase, Akt, and GSK-3β, preserving mitochondrial membrane potential and inducing an mitochondrial permeability transition pore opening. In conclusion, H/I decreased endogenous spermine concentrations in cardiomyocytes, which ultimately induced apoptosis. The addition of exogenous spermine effectively prevented myocyte cell death.
Collapse
Affiliation(s)
- Can Wei
- Department of Pathophysiology, Harbin Medical University, Harbin 150081, China The Key Laboratory of Cardiovascular Medicine Research (Harbin Medical University), Ministry of Education, Harbin 150081, China
| | - Hongzhu Li
- Department of Pathophysiology, Harbin Medical University, Harbin 150081, China
| | - Yuehong Wang
- Department of Pathophysiology, Harbin Medical University, Harbin 150081, China
| | - Xue Peng
- Department of Pathophysiology, Harbin Medical University, Harbin 150081, China
| | - Hongjiang Shao
- Department of Pathophysiology, Harbin Medical University, Harbin 150081, China
| | - Hongxia Li
- Department of Pathophysiology, Harbin Medical University, Harbin 150081, China
| | - Shuzhi Bai
- Department of Pathophysiology, Harbin Medical University, Harbin 150081, China
| | - Changqing Xu
- Department of Pathophysiology, Harbin Medical University, Harbin 150081, China The Key Laboratory of Cardiovascular Medicine Research (Harbin Medical University), Ministry of Education, Harbin 150081, China
| |
Collapse
|
16
|
Wang W, Zhao L, Bai F, Zhang T, Dong H, Liu L. The protective effect of dopamine against OGD/R injury-induced cell death in HT22 mouse hippocampal cells. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2016; 42:176-182. [PMID: 26867202 DOI: 10.1016/j.etap.2016.01.020] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Revised: 01/21/2016] [Accepted: 01/23/2016] [Indexed: 06/05/2023]
Abstract
Previous studies have shown that levo-dopamine (L-dopa) can improve the consciousness of certain patients with prolonged coma after cerebral ischemia-reperfusion injury, and promote cell growth in vivo. This study aimed to investigate whether L-dopa, which is used clinically to treat Parkinson's disease, might also ameliorate ischemia-reperfusion injury-induced cell death. The oxygen-glucose deprivation and re-oxygenation (OGD/R) model was used to mimic the ischemia-reperfusion pathological process in vitro. HT22 cells were treated with dopamine hydrochloride at different times (i.e., 2 h prior to OGD, during the period of OGD, during the period of R, and throughout the period of OGD/R) and at different concentrations (i.e., 25 μM, 50 μM, 100 μM). Lactate dehydrogenase (LDH) release, flow cytometry-annexin V, and propidium iodide staining with light microscopy showed that dopamine hydrochloride (added during re-oxygenation) promoted cell proliferation and facilitated maintenance of normal cell morphology. However, when present during oxygen-glucose deprivation for 18 h and present throughout OGD/R, dopamine hydrochloride increased cell damage as manifested by shrinkage, rounding up, and reduced viability. In conclusion, dopamine protected HT22 cells from OGD/R injury-induced cell death only at a particular point in time, suggesting that it may be useful for treating severe ischemia-reperfusion brain injury.
Collapse
Affiliation(s)
- Wenzhu Wang
- Institute of Rehabilitation Medicine of China, Chinese Institute of Rehabilitation Science, China Rehabilitation Research Center, Beijing, PR China; Beijing Key Laboratory of Neural Injury and Rehabilitation, PR China
| | - Lixi Zhao
- Institute of Rehabilitation Medicine of China, Chinese Institute of Rehabilitation Science, China Rehabilitation Research Center, Beijing, PR China; Beijing Key Laboratory of Neural Injury and Rehabilitation, PR China
| | - Fan Bai
- Institute of Rehabilitation Medicine of China, Chinese Institute of Rehabilitation Science, China Rehabilitation Research Center, Beijing, PR China; Beijing Key Laboratory of Neural Injury and Rehabilitation, PR China
| | - Tong Zhang
- Beijing Bo Ai Hospital, China Rehabilitation Research Center, Beijing, PR China; School of Rehabilitation Medicine, Capital Medical University, Beijing, PR China
| | - Hao Dong
- Beijing Bo Ai Hospital, China Rehabilitation Research Center, Beijing, PR China; Institute of Rehabilitation Medicine of China, Chinese Institute of Rehabilitation Science, China Rehabilitation Research Center, Beijing, PR China
| | - Lixu Liu
- Beijing Bo Ai Hospital, China Rehabilitation Research Center, Beijing, PR China; School of Rehabilitation Medicine, Capital Medical University, Beijing, PR China.
| |
Collapse
|
17
|
Li H, Zhang C, Sun W, Li L, Wu B, Bai S, Li H, Zhong X, Wang R, Wu L, Xu C. Exogenous hydrogen sulfide restores cardioprotection of ischemic post-conditioning via inhibition of mPTP opening in the aging cardiomyocytes. Cell Biosci 2015; 5:43. [PMID: 26229588 PMCID: PMC4520088 DOI: 10.1186/s13578-015-0035-9] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Accepted: 07/20/2015] [Indexed: 11/15/2022] Open
Abstract
The physiological and pathological roles of hydrogen sulfide (H2S) in the regulation of cardiovascular functions have been recognized. H2S protects against the hypoxia/reoxygenation (H/R)-induced injury and apoptosis of cardiomyocytes, and ischemic post-conditioning (PC) plays an important role in cardioprotection from H/R injury in neonatal cardiomyocytes but not in aging cardiomyocytes. Whether H2S is involved in the recovery of PC-induced cardioprotection in aging cardiomyocytes is unclear. In the present study, we found that both H/R and PC decreased cystathionine-γ-lyase (CSE) expression and the production rate of H2S. Supplementation of NaHS protected against H/R-induced apoptosis, the expression of cleaved caspase-3 and cleaved caspase-9, the release of cytochrome c (Cyt c), and mPTP opening. The addition of NaHS also counteracted the reduction of cell viability caused by H/R and increased the phosphorylation of ERK1/2, PI3K, Akt, GSK-3β and mitochondrial membrane potential. Additionally, NaHS increased Bcl-2 expression, promoted PKC-ε translocation to the cell membrane, and activated mitochondrial ATP-sensitive K channels (mitoKATP). PC alone did not provide cardioprotection in H/R-treated aging cardiomyocytes, which was significantly restored by the supplementation of NaHS. In conclusion, our results suggest that exogenous H2S restores PC-induced cardioprotection via the inhibition of mPTP opening by the activation of the ERK1/2-GSK-3β, PI3K-Akt-GSK-3β and PKC-ε-mitoKATP pathways in aging cardiomyocytes. These findings provide a novel target for the treatment of aging ischemic cardiomyopathy.
Collapse
Affiliation(s)
- Hongzhu Li
- Department of Pathophysiology, Harbin Medical University, Baojian Road, Harbin, 150081 China ; The Key Laboratory of Cardiovascular Medicine Research (Harbin Medical University), Ministry of Education, Harbin, 150086 China
| | - Chao Zhang
- Department of Emergency, Heilongjiang Provincial Hospital, Harbin, 150036 China
| | - Weiming Sun
- Department of Pathophysiology, Harbin Medical University, Baojian Road, Harbin, 150081 China
| | - Lina Li
- Department of Pathophysiology, Harbin Medical University, Baojian Road, Harbin, 150081 China
| | - Bo Wu
- Department of Pathophysiology, Harbin Medical University, Baojian Road, Harbin, 150081 China
| | - Shuzhi Bai
- Department of Pathophysiology, Harbin Medical University, Baojian Road, Harbin, 150081 China
| | - Hongxia Li
- Department of Pathophysiology, Harbin Medical University, Baojian Road, Harbin, 150081 China
| | - Xin Zhong
- Department of Pathophysiology, Harbin Medical University, Baojian Road, Harbin, 150081 China ; The Key Laboratory of Cardiovascular Medicine Research (Harbin Medical University), Ministry of Education, Harbin, 150086 China
| | - Rui Wang
- Department of Biology, Lakehead University, Thunder Bay, ON P7B 5E1 Canada
| | - Lingyun Wu
- Department of Health Science, Lakehead University, Thunder Bay, ON P7B 5E1 Canada
| | - Changqing Xu
- Department of Pathophysiology, Harbin Medical University, Baojian Road, Harbin, 150081 China ; The Key Laboratory of Cardiovascular Medicine Research (Harbin Medical University), Ministry of Education, Harbin, 150086 China
| |
Collapse
|
18
|
Water Extract of Fructus Hordei Germinatus Shows Antihyperprolactinemia Activity via Dopamine D2 Receptor. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2014; 2014:579054. [PMID: 25254056 PMCID: PMC4164367 DOI: 10.1155/2014/579054] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Revised: 07/29/2014] [Accepted: 08/14/2014] [Indexed: 11/25/2022]
Abstract
Objective. Fructus Hordei Germinatus is widely used in treating hyperprolactinemia (hyperPRL) as a kind of Chinese traditional herb in China. In this study, we investigated the anti-hyperPRL activity of water extract of Fructus Hordei Germinatus (WEFHG) and mechanism of action. Methods. Effect of WEFHG on serum prolactin (PRL), estradiol (E2), progesterone (P), follicle-stimulating hormone (FSH), luteinizing hormone (LH), and hypothalamus protein kinase A (PKA) and cyclic adenosine monophosphate (cAMP) levels of hyperPRL rats were investigated. And effect of WEFHG on PRL secretion, D2 receptors, and dopamine transporters (DAT) was studied in MMQ, GH3, and PC12 cells, respectively. Results. WEFHG reduced the secretion of PRL in hyperPRL rats effectively. In MMQ cell, treatment with WEFHG at 1–5 mg/mL significantly suppressed PRL secretion and synthesis. Consistent with a D2-action, WEFHG did not affect PRL in rat pituitary lactotropic tumor-derived GH3 cells that lack the D2 receptor expression but significantly increased the expression of D2 receptors and DAT in PC12 cells. In addition, WEFHG reduced the cAMP and PKA levels of hypothalamus in hyperPRL rats significantly. Conclusions. WEFHG showed anti-hyperPRL activity via dopamine D2 receptor, which was related to the second messenger cAMP and PKA.
Collapse
|
19
|
Li H, Wei C, Gao J, Bai S, Li H, Zhao Y, Li H, Han L, Tian Y, Yang G, Wang R, Wu L, Xu C. Mediation of dopamine D2 receptors activation in post-conditioning-attenuated cardiomyocyte apoptosis. Exp Cell Res 2014; 323:118-130. [DOI: 10.1016/j.yexcr.2013.12.028] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2013] [Revised: 12/18/2013] [Accepted: 12/31/2013] [Indexed: 02/08/2023]
|
20
|
Vettel C, Hottenrott MC, Spindler R, Benck U, Schnuelle P, Tsagogiorgas C, Krämer BK, Hoeger S, El-Armouche A, Wieland T, Yard BA. Dopamine and Lipophilic Derivates Protect Cardiomyocytes against Cold Preservation Injury. J Pharmacol Exp Ther 2013; 348:77-85. [DOI: 10.1124/jpet.113.207001] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
|
21
|
Gao J, Guo J, Li H, Bai S, Li H, Wu B, Wang L, Xi Y, Tian Y, Yang G, Wang R, Wu L, Xu C, Li H. Involvement of dopamine D2 receptors activation in ischemic post-conditioning-induced cardioprotection through promoting PKC-ε particulate translocation in isolated rat hearts. Mol Cell Biochem 2013; 379:267-76. [DOI: 10.1007/s11010-013-1648-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2013] [Accepted: 04/11/2013] [Indexed: 11/30/2022]
|
22
|
Piao L, Fang YH, Parikh KS, Ryan JJ, D'Souza KM, Theccanat T, Toth PT, Pogoriler J, Paul J, Blaxall BC, Akhter SA, Archer SL. GRK2-mediated inhibition of adrenergic and dopaminergic signaling in right ventricular hypertrophy: therapeutic implications in pulmonary hypertension. Circulation 2012; 126:2859-69. [PMID: 23124027 DOI: 10.1161/circulationaha.112.109868] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
BACKGROUND The cause and consequences of impaired adrenergic signaling in right ventricular failure/hypertrophy (RVH) are poorly understood. We hypothesized that G protein-coupled receptor kinase-2 (GRK2)-mediated uncoupling of β-adrenergic receptor signaling impairs inotropic reserve. The implications of right ventricular (RV) adrenergic remodeling for inotrope selection and the therapeutic benefit of interrupting Gβγ-GRK2 interaction, using gallein, were tested. METHODS AND RESULTS Chamber-specificity and cellular localization of adrenergic remodeling were compared in rodent RVH associated with pulmonary arterial hypertension (PAH-RVH; SU5416+chronic-hypoxia or Monocrotaline) versus pulmonary artery banding-induced RVH (PAB-RVH). Results were corroborated in RV arrays from 10 PAH patients versus controls. Inotropic reserve was assessed in RV- and left ventricular-Langendorff models and in vivo. Gallein therapy (1.8 mg/kg/day ×2-weeks) was assessed. Despite similar RVH, cardiac output (58.3±4.9 versus 82.9±4.8 mL/min; P<0.001) and treadmill distance (41.5±11.6 versus 244.1±12.4 m; P<0.001) were lower in PAH-RVH versus PAB-RVH. In PAH-RVH versus PAB-RVH there was greater downregulation of β1-, α1- and dopamine-1 receptors, more left ventricular involvement, and greater impairment of RV contractile reserve. RV GRK2 activity increased in parallel with a reduction in both adrenergic receptor expression and inotrope-stimulated cAMP levels (P<0.01). β1-receptor downregulation also occurred in human PAH-RVH. Dobutamine was superior to dopamine as an RV inotrope, both ex vivo and in vivo. CONCLUSIONS GRK2-mediated desensitization-downregulation of adrenergic and dopaminergic receptors impairs inotropic reserve in PAH-RVH. Acute inotropic support in RVH is best accomplished by dobutamine, reflecting its better coupling to adenylyl cyclase and the reliance of dopamine on dopamine-1-receptor signaling, which is impaired in RVH. Inhibiting Gβγ-GRK2 interactions has therapeutic benefit in RVH.
Collapse
Affiliation(s)
- Lin Piao
- Section of Cardiology, Department of Medicine, University of Chicago Medical Center, University of Chicago, Chicago, IL 60637, USA
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
23
|
Li H, Mani S, Cao W, Yang G, Lai C, Wu L, Wang R. Interaction of hydrogen sulfide and estrogen on the proliferation of vascular smooth muscle cells. PLoS One 2012; 7:e41614. [PMID: 22870237 PMCID: PMC3411693 DOI: 10.1371/journal.pone.0041614] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2012] [Accepted: 06/22/2012] [Indexed: 12/24/2022] Open
Abstract
Hydrogen sulfide (H(2)S) can be endogenously generated from cystathionine gamma-lyase (CSE) in cardiovascular system, offering a cardiovascular protection. It is also known that the lower risk of cardiovascular diseases in female is partially attributed to the protective effect of estrogen. The current study explores the interaction of H(2)S and estrogen on smooth muscle cell (SMC) growth. In the present study, we found that the proliferation of cultured vascular SMCs isolated from wild-type mice (WT-SMCs) was inhibited, but that from CSE gene knockout mice (CSE-KO-SMCs) increased, by estrogen treatments. The expression of estrogen receptor α (ERα), but not ERβ, was significantly decreased in CSE-KO-SMCs compared with that in WT-SMCs. Exogenously applied H(2)S markedly increased ERα but not ERβ expression. In addition, the inhibition of ER activation and knockdown of ERα expression in WT-SMCs or the overexpression of ERα in CSE-KO-SMCs reversed the respective effects of estrogen on cell proliferation. The expression of cyclin D1 was reduced in WT-SMCs but increased in CSE-KO-SMCs after estrogen treatments, which was reversed by knockdown of ERα in WT-SMCs or overexpression of ERα in CSE-KO-SMCs, respectively. The overexpression of cyclin D1 in WT-SMCs or knockdown of cyclin D1 expression in CSE-KO-SMCs reversed the effects of estrogen on cell proliferation. These results suggest that H(2)S mediates estrogen-inhibited proliferation of SMCs via selective activation of ERα/cyclin D1 pathways.
Collapse
Affiliation(s)
- Hongzhu Li
- Department of Biology, Lakehead University, Thunder Bay, Canada
- Department of Pathophysiology, Harbin Medical University, Harbin, China
| | - Sarathi Mani
- Department of Biology, Lakehead University, Thunder Bay, Canada
| | - Wei Cao
- Department of Health Science, Lakehead University, Thunder Bay, Canada
| | - Guangdong Yang
- The School of Kinesiology, Lakehead University, Thunder Bay, Canada
| | - Christopher Lai
- Northern Ontario School of Medicine, Lakehead University, Thunder Bay, Canada
| | - Lingyun Wu
- Department of Health Science, Lakehead University, Thunder Bay, Canada
| | - Rui Wang
- Department of Biology, Lakehead University, Thunder Bay, Canada
- Department of Pathophysiology, Harbin Medical University, Harbin, China
- * E-mail:
| |
Collapse
|
24
|
Li HZ, Guo J, Gao J, Han LP, Jiang CM, Li HX, Bai SZ, Zhang WH, Li GW, Wang LN, Li H, Zhao YJ, Lin Y, Tian Y, Yang GD, Wang R, Wu LY, Yang BF, Xu CQ. Role of dopamine D2 receptors in ischemia/reperfusion induced apoptosis of cultured neonatal rat cardiomyocytes. J Biomed Sci 2011; 18:18. [PMID: 21324201 PMCID: PMC3050795 DOI: 10.1186/1423-0127-18-18] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2010] [Accepted: 02/16/2011] [Indexed: 11/25/2022] Open
Abstract
Background Myocardial ischemia/reperfusion injury is the major cause of morbidity and mortality for cardiovascular diseases. Dopamine D2 receptors are expressed in cardiac tissues. However, the roles of dopamine D2 receptors in myocardial ischemia/reperfusion injury and cardiomyocyte apoptosis are unclear. Here we investigated the effects of both dopamine D2 receptors agonist (bromocriptine) and antagonist (haloperidol) on apoptosis of cultured neonatal rat ventricular myocytes induced by ischemia/reperfusion injury. Methods Myocardial ischemia/reperfusion injury was simulated by incubating primarily cultured neonatal rat cardiomyocytes in ischemic (hypoxic) buffer solution for 2 h. Thereafter, these cells were incubated for 24 h in normal culture medium. Results Treatment of the cardiomyocytes with 10 μM bromocriptine significantly decreased lactate dehydrogenase activity, increased superoxide dismutase activity, and decreased malondialdehyde content in the culture medium. Bromocriptine significantly inhibited the release of cytochrome c, accumulation of [Ca2+]i, and apoptosis induced by ischemia/reperfusion injury. Bromocriptine also down-regulated the expression of caspase-3 and -9, Fas and Fas ligand, and up-regulated Bcl-2 expression. In contrast, haloperidol (10 μM) had no significant effects on the apoptosis of cultured cardiomyocytes under the aforementioned conditions. Conclusions These data suggest that activation of dopamine D2 receptors can inhibit apoptosis of cardiomyocytes encountered during ischemia/reperfusion damage through various pathways.
Collapse
Affiliation(s)
- Hong-zhu Li
- Department of Pathophysiology, Harbin Medical University, Harbin, PR China
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
25
|
Li GW, Xing WJ, Bai SZ, Hao JH, Guo J, Li HZ, Li HX, Zhang WH, Yang BF, Wu LY, Wang R, Yang GD, Xu CQ. The calcium-sensing receptor mediates hypoxia-induced proliferation of rat pulmonary artery smooth muscle cells through MEK1/ERK1,2 and PI3K pathways. Basic Clin Pharmacol Toxicol 2010; 108:185-93. [PMID: 21073657 DOI: 10.1111/j.1742-7843.2010.00639.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Activation of the calcium-sensing receptor (CaSR) leads to an increase of intracellular calcium concentration and alteration of cellular activities. High level of intracellular calcium is involved in hypoxia-induced proliferation of pulmonary arterial smooth muscle cells (PASMCs). However, whether the CaSR is expressed in PAMSCs and is related to the hypoxia-induced proliferation of PASMCs is unclear. In this study, the expression and distribution of CaSRs were detected by RT-PCR, western blotting and immunofluorescence; the intracellular concentration of free calcium ([Ca(2+) ](i) ) was determined by confocal laser scanning microscopy; cell proliferation was tested using an MTT and BrdU incorporation assay; cell cycle analysis was carried out using a flow cytometric assay; and the expression of proliferating cell nuclear antigen (PCNA), extracellular signal-regulated protein kinase 1,2 (ERK1,2) and AKT were analysed by western blotting. We observed that both CaSR mRNA and protein were expressed in rat PASMCs. Lowering of oxygen from 21% to 2.5% led to increased [Ca(2+) ](i) and CaSR expression. This condition of hypoxia also stimulated PASMCs proliferation accompanying with increased phosphorylation of ERK1,2 and AKT. GdCl(3) (an agonist of CaSR) or NPS2390 (an antagonist of CaSR) amplified or weakened the effect of hypoxia, respectively. PD98059 (a MEK1 inhibitor) or LY294002 (a PI3K inhibitors) decreased the up-regulation of PCNA expression and the increase of the cell proliferation index induced by hypoxia and GdCl(3) in PASMCs. Our results suggest that CaSR is expressed in rat PASMCs, and that CaSR activation through MEK1/ERK1,2 and PI3 kinase pathways is involved in hypoxia-induced proliferation of PASMCs.
Collapse
Affiliation(s)
- Guang-Wei Li
- Department of Pathophysiology, Harbin Medical University, Harbin, China
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
26
|
Cavallotti C, Mancone M, Bruzzone P, Sabbatini M, Mignini F. Dopamine receptor subtypes in the native human heart. Heart Vessels 2010; 25:432-7. [DOI: 10.1007/s00380-009-1224-4] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
|
27
|
Apoptotic effect of sonodynamic therapy mediated by hematoporphyrin monomethyl ether on C6 glioma cells in vitro. Acta Neurochir (Wien) 2009; 151:1655-61. [PMID: 19597759 DOI: 10.1007/s00701-009-0456-5] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2009] [Accepted: 06/23/2009] [Indexed: 12/16/2022]
Abstract
PURPOSE Sonodynamic therapy (SDT) is a new method for treating cancer by inducing cell necrosis and/or apoptosis. However, the molecular mechanisms of cell apoptosis after SDT treatment remain unclear. In this study we investigated the apoptotic effect and mechanisms of SDT mediated by hematoporphyrin monomethyl ether (HMME) on C6 glioma cells in vitro. METHODS The time of ultrasound irradiation was optimized by MTT. The apoptotic rate, generation of ROS (reactive oxygen species), and mitochondrial membrane potential (MMP) were detected by flow cytometry, and expressions of apoptosis proteins were measured by Western blot after SDT treatment. RESULTS The results displayed that treatment of C6 glioma cells with SDT resulted in the occurrence of apoptosis, which was associated with the production of ROS and loss of MMP. The results also showed that protein expression of Bax, caspase-9, and caspase-3 significantly increased, protein expression of Bcl-2 and Fas-L significantly decreased, and Fas protein expression was unchanged after SDT treatment. CONCLUSIONS Our results suggested that the mitochondrial signal pathway may play a pivotal role in the apoptosis induced by SDT in C6 glioma cells.
Collapse
|
28
|
Li H, Shi S, Sun YH, Zhao YJ, Li QF, Li HZ, Wang R, Xu CQ. Dopamine D2 receptor stimulation inhibits angiotensin II-induced hypertrophy in cultured neonatal rat ventricular myocytes. Clin Exp Pharmacol Physiol 2008; 36:312-8. [PMID: 18986329 DOI: 10.1111/j.1440-1681.2008.05064.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
1. Myocardial hypertrophy is a common pathological change that accompanies cardiovascular disease. Dopamine D2 receptors have been demonstrated in cardiovascular tissues. However, the pathophysiological involvement of D2 receptors in myocardial hypertrophy is unclear. Therefore, the effects of the D2 receptor agonist bromocriptine and the D2 receptor antagonist haloperidol on angiotensin (Ang) II- or endothelin (ET)-1-induced hypertrophy of cultured neonatal rat ventricular myocytes were investigated in the present study. 2. Protein content and protein synthesis, determined by examining [(3)H]-leucine uptake, were used as estimates of cardiomyocyte hypertrophy. The expression of D2 receptor protein in neonatal rat ventricular myocytes was determined using western blotting. Changes in [Ca(2+)](i) in cardiomyocytes were observed by laser scanning confocal microscopy. 3. Angiotensin II and ET-1, both at 10 nmol/L, induced myocyte hypertrophy, as demonstrated by increased protein content and synthesis, [Ca(2+)](i) levels, protein kinase C (PKC) activity and phosphorylation of extracellular signal-regulated kinase, c-Jun N-terminal kinase and mitogen-activated protein kinase (MAPK) p38 (p38). Concomitant treatment of cells with 10 nmol/L AngII plus 10 micromol/L bromocriptine significantly inhibited cardiomyocyte hypertrophy, MAPK phosphorylation and PKC activity in the membrane, as well as [Ca(2+)](i) signalling pathways, compared with the effects of AngII alone. In addition, 10 micromol/L bromocriptine significantly inhibited cardiomyocyte hypertrophy induced by 10 nmol/L ET-1. However, pretreatment with haloperidol (10 micromol/L) had no significant effects on cardiomyocyte hypertrophy induced by either AngII or ET-1. 4. In conclusion, D2 receptor stimulation inhibits AngII-induced hypertrophy of cultured neonatal rat ventricular myocytes via inhibition of MAPK, PKC and [Ca(2+)](i) signalling pathways.
Collapse
Affiliation(s)
- Hong Li
- Department of Pathophysiology, Second Affiliated Hospital of Harbin Medical University, China
| | | | | | | | | | | | | | | |
Collapse
|
29
|
Errata. Basic Clin Pharmacol Toxicol 2008. [DOI: 10.1111/j.1742-7843.2007.246_1.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
|
30
|
|
31
|
Errata. Basic Clin Pharmacol Toxicol 2008. [DOI: 10.1111/j.1742-7843.2007.246_2.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|