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Bahr F, Ricke-Hoch M, Ponimaskin E, Müller F. Serotonin Receptors in Myocardial Infarction: Friend or Foe? ACS Chem Neurosci 2024; 15:1619-1634. [PMID: 38573542 PMCID: PMC11027101 DOI: 10.1021/acschemneuro.4c00031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 03/12/2024] [Accepted: 03/13/2024] [Indexed: 04/05/2024] Open
Abstract
Acute myocardial infarction (AMI) is one of the leading causes of death worldwide and treatment costs pose a major burden on the global health care system. Despite the variety of treatment options, individual recovery can be still poor and the mortality rate, especially in the first few years after the event, remains high. Therefore, intense research is currently focused on identifying novel target molecules to improve the outcome following AMI. One of the potentially interesting targets is the serotonergic system (5-HT system), not at least because of its connection to mental disorders. It is known that patients suffering from AMI have an increased risk of developing depression and vice versa. This implicates that the 5-HT system can be affected in response to AMI and might thus represent a target structure for patients' treatment. This review aims to highlight the importance of the 5-HT system after AMI by describing the role of individual serotonin receptors (5-HTR) in the regulation of physiological and pathophysiological responses. It particularly focuses on the signaling pathways of the serotonin receptors 1, 2, 4, and 7, which are expressed in the cardiovascular system, during disease onset, and the following remodeling process. This overview also emphasizes the importance of the 5-HT system in AMI etiology and highlights 5-HTRs as potential treatment targets.
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Affiliation(s)
- F.S. Bahr
- Cellular
Neurophysiology, Hannover Medical School, 30625 Hannover, Germany
| | - M. Ricke-Hoch
- Cardiology
and Angiology, Hannover Medical School, 30625 Hannover, Germany
| | - E. Ponimaskin
- Cellular
Neurophysiology, Hannover Medical School, 30625 Hannover, Germany
| | - F.E. Müller
- Cellular
Neurophysiology, Hannover Medical School, 30625 Hannover, Germany
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2
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Wang L, Wang J, Shan Q, Shu H, Guo JM. Involvement of baroreflex deficiency in the age-related loss of estrogen efficacy against cerebral ischemia. Front Aging Neurosci 2023; 15:1167170. [PMID: 37205058 PMCID: PMC10186347 DOI: 10.3389/fnagi.2023.1167170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Accepted: 04/03/2023] [Indexed: 05/21/2023] Open
Abstract
For post-menopausal women, stroke is complicated by the variable effects of estrogen therapy and the age-related therapeutic consequences involved. Estrogen therapy has been shown to have an age-dimorphic effect, which is neuroprotective in young females, but non-neuroprotective, even neurotoxic in acyclic females. We hypothesized that arterial baroreflex (ABR) and its downstream acetylcholine-α7 nicotinic acetylcholine receptor (α7nAChR) anti-inflammatory pathways are involved in estrogen efficacy toward cerebral ischemic damage. Our data showed that estrogen supplements contributed to ABR improvement and neuroprotection in adult, not aged, ovariectomized (OVX) rats. In adult rats, OVX-induced estrogen deficiency aggravated middle cerebral artery occlusion (MCAO), which induced brain infarction and reduced ABR function, with decreased α7nAChR expression of the brain and exaggerated inflammation following MCAO; these effects were significantly prevented by supplementation with estrogen. ABR impairment by sinoaortic denervation partly attenuated the estrogen effect on baroreflex sensitivity (BRS) and ischemic damage in adult rats, as well as α7nAChR expression and inflammatory response. These data suggested that ABR and acetylcholine-α7nAChR anti-inflammatory pathways are involved in the neuroprotection of estrogen in adult OVX rats. In contrast, aged rats exhibited more severe ischemic damage and inflammatory response than adult rats, as well as poorer baroreflex function and lower α7nAChR expression. Estrogen supplements did not improve BRS or confer neuroprotection in aged rats without affecting brain α7nAChR and post-ischemic inflammation. Most importantly, ketanserin restored ABR function and significantly postponed the onset of stroke in aged female strokeprone spontaneously hypertensive rats, whereas estrogen treatment failed to delay the development of stroke. Our findings reveal that estrogen is protective against ischemic stroke (IS) in adult female rats and that ABR played a role in this beneficial action. Dysfunction of ABR and unresponsiveness to estrogen in aged female rats may contribute to a reduced estrogen efficacy against cerebral ischemia.
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Affiliation(s)
- Lei Wang
- Department of Orthopedics, 960th Hospital of PLA, Jinan, Shandong, China
| | - Jia Wang
- Health Service Department, 960th Hospital of PLA, Jinan, Shandong, China
| | - Qing Shan
- Department of Clinical Pharmacy, Weifang Medical University, Weifang, Shandong, China
| | - He Shu
- Department of Clinical Pharmacy, 960th Hospital of PLA, Jinan, Shandong, China
| | - Jin-Min Guo
- Department of Clinical Pharmacy, 960th Hospital of PLA, Jinan, Shandong, China
- *Correspondence: Jin-Min Guo,
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3
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Olbrich S, Preller KH, Vollenweider FX. LSD and ketanserin and their impact on the human autonomic nervous system. Psychophysiology 2021; 58:e13822. [PMID: 33772794 DOI: 10.1111/psyp.13822] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 01/23/2021] [Accepted: 02/15/2021] [Indexed: 12/25/2022]
Abstract
The interest in lysergic acid diethylamide (LSD) has sparked again due to its supposed positive effects on psychopathological conditions. Yet, most research focuses on the actions of LSD on the central nervous system. The interaction with the autonomic nervous system (ANS) has been neglected so far. Therefore, the aim was to assess the effects of LSD and the serotonin 2A receptor antagonist ketanserin on the ANS as assessed by heart rate variability (HRV) measures and their correlation with subjective drug-induced effects in a randomized, placebo-controlled crossover trial. Thus, ANS activity was derived from electrocardiogram recordings after intake of placebo, LSD or ketanserin, and LSD by calculating R-peak-based measures of sympathetic and parasympathetic activity. Repeated measure ANOVA and partial correlation for HRV measures and subjective experience questionnaires were performed. LSD predominantly increased sympathetic activity, while ketanserin counteracted this effect on the ANS via an increase of parasympathetic tone. Sympathetic activity was positively and parasympathetic activity negatively associated with psychedelic effects of LSD. Furthermore, Placebo HRV measures predicted subjective experiences after LSD intake. The association between trait ANS activity and LSD-induced subjective experiences may serve as a candidate biomarker set for the effectiveness of LSD in the treatment of psychopathological conditions.
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Affiliation(s)
- Sebastian Olbrich
- Department of Psychiatry, Psychotherapy and Psychosomatics, University Hospital of Zurich, Zurich, Switzerland
| | - Katrin H Preller
- Department of Psychiatry, Psychotherapy and Psychosomatics, University Hospital of Zurich, Zurich, Switzerland
| | - Franz X Vollenweider
- Department of Psychiatry, Psychotherapy and Psychosomatics, University Hospital of Zurich, Zurich, Switzerland
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4
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Lu J, Wu W. Cholinergic modulation of the immune system - A novel therapeutic target for myocardial inflammation. Int Immunopharmacol 2021; 93:107391. [PMID: 33548577 DOI: 10.1016/j.intimp.2021.107391] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 12/26/2020] [Accepted: 01/09/2021] [Indexed: 12/11/2022]
Abstract
The immune system and the nervous system depend on each other for their fine tuning and working, thus cooperating to maintain physiological homeostasis and prevent infections. The cholinergic system regulates the mobilization, differentiation, secretion, and antigen presentation of adaptive and innate immune cells mainly through α7 nicotinic acetylcholine receptors (α7nAChRs). The neuro-immune interactions are established and maintained by the following mechanisms: colocalization of immune and neuronal cells at defined anatomical sites, expression of the non-neuronal cholinergic system by immune cells, and the acetylcholine receptor-mediated activation of intracellular signaling pathways. Based on these immunological mechanisms, the protective effects of cholinergic system in animal models of diseases were summarized in this paper, such as myocardial infarction/ischemia-reperfusion, viral myocarditis, and endotoxin-induced myocardial damage. In addition to maintaining hemodynamic stability and improving the energy metabolism of the heart, both non-neuronal acetylcholine and neuronal acetylcholine in the heart can alleviate myocardial inflammation and remodeling to exert a significant cardioprotective effect. The new findings on the role of cholinergic agonists and vagus nerve stimulation in immune regulation are updated, so as to develop improved approaches to treat inflammatory heart disease.
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Affiliation(s)
- Jing Lu
- Department of Cardiology, The First Affiliated Hospital of Guangxi Medical University, Shuangyong Road 6, Nanning, Guangxi Zhuang Autonomous Region 530021, PR China.
| | - Weifeng Wu
- Department of Cardiology, The First Affiliated Hospital of Guangxi Medical University, Shuangyong Road 6, Nanning, Guangxi Zhuang Autonomous Region 530021, PR China; Key Laboratory of Longevity and Aging-related Diseases of Chinese Ministry of Education, Center for Translational Medicine, Guangxi Medical University, Shuangyong Road 22, Nanning, Guangxi Zhuang Autonomous Region 530021, PR China.
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5
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Li CC, Qiu XT, Sun Q, Zhou JP, Yang HJ, Wu WZ, He LF, Tang CE, Zhang GG, Bai YP. Endogenous reduction of miR-185 accelerates cardiac function recovery in mice following myocardial infarction via targeting of cathepsin K. J Cell Mol Med 2018; 23:1164-1173. [PMID: 30450725 PMCID: PMC6349160 DOI: 10.1111/jcmm.14016] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 08/27/2018] [Accepted: 09/14/2018] [Indexed: 12/15/2022] Open
Abstract
Angiogenesis is critical for re‐establishing the blood supply to the surviving myocardium after myocardial infarction (MI) in patients with acute coronary syndrome (ACS). MicroRNAs are recognised as important epigenetic regulators of endothelial function. The aim of this study was to determine the roles of microRNAs in angiogenesis. Eighteen circulating microRNAs including miR‐185‐5p were differently expressed in plasma from patients with ACS by high‐throughput RNA sequencing. The expressional levels of miR‐185‐5p were dramatically reduced in hearts isolated from mice following MI and cultured human umbilical vein endothelial cells (HUVECs) under hypoxia, as determined by fluorescence in situ hybridisation and quantitative RT‐PCR. Evidence from computational prediction and luciferase reporter gene activity indicated that cathepsin K (CatK) mRNA is a target of miR‐185‐5p. In HUVECs, miR‐185‐5p mimics inhibited cell proliferations, migrations and tube formations under hypoxia, while miR‐185‐5p inhibitors performed the opposites. Further, the inhibitory effects of miR‐185‐5p up‐regulation on cellular functions of HUVECs were abolished by CatK gene overexpression, and adenovirus‐mediated CatK gene silencing ablated these enhancive effects in HUVECs under hypoxia. In vivo studies indicated that gain‐function of miR‐185‐5p by agomir infusion down‐regulated CatK gene expression, impaired angiogenesis and delayed the recovery of cardiac functions in mice following MI. These actions of miR‐185‐5p agonists were mirrored by in vivo knockdown of CatK in mice with MI. Endogenous reductions of miR‐185‐5p in endothelial cells induced by hypoxia increase CatK gene expression to promote angiogenesis and to accelerate the recovery of cardiac function in mice following MI.
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Affiliation(s)
- Chuan-Chang Li
- Department of Geriatric Medicine, Xiangya Hospital, Central South University, Changsha, China.,National Clinical Research Center for Geriatric Disorder, Xiangya Hospital, Central South University, Changsha, China
| | - Xue-Ting Qiu
- Department of Geriatric Medicine, Xiangya Hospital, Central South University, Changsha, China
| | - Quan Sun
- Department of Cardiovascular Medicine, Xiangya Hospital, Central South University, Changsha, China
| | - Ji-Peng Zhou
- National Clinical Research Center for Geriatric Disorder, Xiangya Hospital, Central South University, Changsha, China
| | - Hui-Jun Yang
- Department of Cardiovascular Medicine, Xiangya Hospital, Central South University, Changsha, China
| | - Wan-Zhou Wu
- Department of Geriatric Medicine, Xiangya Hospital, Central South University, Changsha, China
| | - Ling-Fang He
- Department of Geriatric Medicine, Xiangya Hospital, Central South University, Changsha, China
| | - Can-E Tang
- Institute of Medical Science Research, Xiangya Hospital, Central South University, Changsha, China
| | - Guo-Gang Zhang
- National Clinical Research Center for Geriatric Disorder, Xiangya Hospital, Central South University, Changsha, China.,Department of Cardiovascular Medicine, Xiangya Hospital, Central South University, Changsha, China
| | - Yong-Ping Bai
- Department of Geriatric Medicine, Xiangya Hospital, Central South University, Changsha, China.,National Clinical Research Center for Geriatric Disorder, Xiangya Hospital, Central South University, Changsha, China
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6
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Zhu ML, Yin YL, Ping S, Yu HY, Wan GR, Jian X, Li P. Berberine promotes ischemia-induced angiogenesis in mice heart via upregulation of microRNA-29b. Clin Exp Hypertens 2017; 39:672-679. [PMID: 28722488 DOI: 10.1080/10641963.2017.1313853] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND Berberine has several preventive effects on cardiovascular diseases. Increased expression of miR-29b has been reported to attenuate cardiac remodeling after myocardial infarction (MI). We hypothesized that berberine via an miR-29b-dependent mechanism promotes angiogenesis and improves heart functions in mice after MI. METHODS The MI model was established in mice by ligation of left anterior descending coronary artery. The expression of miR-29b was examined by RT-qPCR. Angiogenesis was assessed by immunohistochemistry. RESULTS Berberine increased miR-29b expression and promoted cell proliferations and migrations in cultured endothelial cells, which were abolished by miR-29b antagomir or AMP-activated protein kinase inhibitor compound C. In mice following MI, administration of berberine significantly increased miR-29b expressional level, promoted angiogenesis, reduced infarct size, and improved heart functions after 14 postoperative days. Importantly, these in vivo effects of berberine were ablated by antagonism of miR-29b. CONCLUSION Berberine via upregulation of miR-29b promotes ischemia-induced angiogenesis and improves heart functions.
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Affiliation(s)
- Mo-Li Zhu
- a College of Pharmacy , Xinxiang Medical University , Xinxiang , Henan , China
| | - Ya-Ling Yin
- b School of Basic Medical Sciences , Xinxiang Medical University , Xinxiang , Henan , China
| | - Song Ping
- a College of Pharmacy , Xinxiang Medical University , Xinxiang , Henan , China
| | - Hai-Ya Yu
- c Department of Neurology , The People's Hospital of Xishui County , Huangang , Hubei , China
| | - Guang-Rui Wan
- a College of Pharmacy , Xinxiang Medical University , Xinxiang , Henan , China
| | - Xu Jian
- a College of Pharmacy , Xinxiang Medical University , Xinxiang , Henan , China
| | - Peng Li
- a College of Pharmacy , Xinxiang Medical University , Xinxiang , Henan , China
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7
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Zhou NQ, Liu N, Li P, Ping S, Peng QS, Shi WD. Tert-butylhydroquinone promotes angiogenesis and improves heart functions in rats after myocardial infarction. Clin Exp Hypertens 2017; 39:402-408. [PMID: 28534651 DOI: 10.1080/10641963.2016.1259322] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
BACKGROUND Hypertension is an increased risk of heart failure and acute myocardial infarction (MI). Tert-butylhydroquinone (tBHQ), as an antioxidant, shows multiple cardioprotective actions including the reduction in blood pressure. The aim of this study was to investigate whether and how tBHQ improves heart functions in rats. METHODS The MI model was established in WKY and spontaneously hypertensive rats (SHRs) by ligation of left anterior descending coronary artery. Akt phosphorylation was examined by western blot in human umbilical vein endothelial cells (HUVECs) or in rats. Angiogenesis was assessed by immunohistochemistry and immunofluorescence. Heart function was determined by echocardiography. RESULTS tBHQ increased Akt phosphorylation, promoted cell proliferations and migrations in HUVECs, which were abolished by Akt inhibitor wortmannin. In SHRs following MI, administration of tBHQ significantly increased Akt phosphorylation, promoted angiogenesis, reduced infarct size, and improved heart functions after 14 postoperative days. Importantly, these in vivo effects of tBHQ were ablated by wortmannin in SHRs. CONCLUSION tBHQ via Akt activation promotes ischemia-induced angiogenesis and improves heart functions in hypertensive rats. In perspectives, the application of tBHQ should be considered in patients with ischemic diseases such as MI and stroke.
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Affiliation(s)
- Nan-Qian Zhou
- a Department of Ultrasound, China-Japan Union Hospital , Jilin University , Changchun , China
| | - Ning Liu
- b Central Laboratory, the Second Hospital , Jilin University , Changchun , China
| | - Peng Li
- c Department of Pharmacology, College of Pharmacy , Xinxiang Medical University , Xinxiang , China
| | - Song Ping
- c Department of Pharmacology, College of Pharmacy , Xinxiang Medical University , Xinxiang , China
| | - Qi-Sheng Peng
- d Key Laboratory of Zoonosis, Ministry of Education, Institute of Zoonosis , Jilin University , Changchun , China
| | - Wei-Dong Shi
- a Department of Ultrasound, China-Japan Union Hospital , Jilin University , Changchun , China
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8
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Guo JM, Zhang L, Niu XC, Shu H, Wang L, Su DF, Zhang Y, Liu AJ, Zhu DQ, Xu JJ. Involvement of arterial baroreflex and nicotinic acetylcholine receptor α7 subunit pathway in the protection of metformin against stroke in stroke-prone spontaneously hypertensive rats. Eur J Pharmacol 2017; 798:1-8. [PMID: 28132912 DOI: 10.1016/j.ejphar.2017.01.035] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Revised: 01/20/2017] [Accepted: 01/25/2017] [Indexed: 10/20/2022]
Abstract
Stroke is a leading cause of mortality and disability worldwide. There is growing evidence that metformin (Met) has potent neuroprotective effects; however, its mechanisms remain unclear. We examined the role of the arterial baroreflex and cholinergic-α7 nicotinic acetylcholine receptor (α7nAChR) anti-inflammory pathway in the beneficial effects of Met against stroke. Stroke-prone spontaneously hypertensive rats (SHRSP) were used to observe stroke development indicated by lifespan of SHRSP and the ischemic injury induced by permanent middle cerebral artery occlusion (MCAO). Sinoaortic denervation was used to inactivate the arterial baroreflex. MCAO were also performed in α7nAChR knockout (KO) mice. Briefly, Met increased the life span of SHRSP and reduced the infarct area induced by MCAO. Met also improved the function of arterial baroreflex. The beneficial effects of Met on stroke were markedly attenuated by blunting the arterial baroreflex. Met up-regulated the expression of vesicular acetylcholine transporter (VAChT) and α7nAChR, down-regulated the level of pro-inflammtory cytokines in serum and peri-infarct of ischemic brain. Arterial baroreflex dysfunction decreased the expression of VAchT and α7nAChR, showed upward tendency in the level of pro-inflammtory cytokines. Most importantly, arterial baroreflex dysfunction nearly abolished such effect of Met on cholinergic signaling. In addition, the α7nAChR KO mice also had significantly worse ischemic damage induced by MCAO, and neuroprotection of Met disappeared in α7nAChR KO mice. In conclusion, Met improved the arterial baroreflex function, and then enhancing cholinergic anti-inflammatory pathway in an α7nAChR-dependent manner, thereby effectively prevent ischemic induced brain injury and delayed stroke onset in SHRSP.
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Affiliation(s)
- Jin-Min Guo
- Department of Pharmacology, Jinan Military General Hospital, Jinan, Shandong, China
| | - Li Zhang
- Department of Pharmacology, Jinan Military General Hospital, Jinan, Shandong, China
| | - Xue-Cai Niu
- Department of Radiotheropy, The Forth Hospital of Jinan City, Jinan, Shandong, China
| | - He Shu
- Department of Pharmacology, Jinan Military General Hospital, Jinan, Shandong, China
| | - Lei Wang
- Department of Orthopaedics, Jinan Military General Hospital, Jinan, Shandong, China
| | - Ding-Feng Su
- Department of Pharmacology, School of Pharmacy, Second Military Medical University, Shanghai, China
| | - Ying Zhang
- Department of Pharmacology, School of Pharmacy, Second Military Medical University, Shanghai, China
| | - Ai-Jun Liu
- Department of Pharmacology, School of Pharmacy, Second Military Medical University, Shanghai, China
| | - De-Qiu Zhu
- Division of Pharmacy, Tongji Hospital, Tongji University School of Medicine, 389 Xin Cun Road, Shanghai 200065, China.
| | - Jian-Jiang Xu
- Department of Pharmacology, Jinan Military General Hospital, Jinan, Shandong, China.
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Tang G, Peng L, Qian G, Wang S, Hu H, Zhang X, Song G, Yao M, Zhai C. WITHDRAWN: Resveratrol increases microRNA-130a expression to promote angiogenesis and improve heart functions in mice after myocardial infarction. Exp Mol Pathol 2016:S0014-4800(16)30047-8. [PMID: 27789328 DOI: 10.1016/j.yexmp.2016.10.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2016] [Revised: 09/22/2016] [Accepted: 10/21/2016] [Indexed: 10/20/2022]
Abstract
This article has been withdrawn at the request of the authors. The Publisher apologizes for any inconvenience this may cause. The full Elsevier Policy on Article Withdrawal can be found at http://www.elsevier.com/locate/withdrawalpolicy.
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Affiliation(s)
- Guanmin Tang
- Department of Cardiology, The First Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang, China
| | - Lei Peng
- Department of Interventional Radiology, Yantai Economic and Technological Developmental Area Hospital, Yantai, China
| | - Gang Qian
- Department of Cardiology, The First Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang, China
| | - Shijun Wang
- Department of Cardiology, The First Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang, China
| | - Huilin Hu
- Department of Cardiology, The First Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang, China
| | - Xiaoping Zhang
- Department of Cardiology, The First Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang, China
| | - Guojie Song
- Department of Cardiology, The First Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang, China
| | - Ming Yao
- Department of Anesthesiology, The First Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang, China
| | - Changlin Zhai
- Department of Cardiology, The First Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang, China.
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Hao C, Huang ZH, Song SW, Shi YQ, Cheng XW, Murohara T, Lu W, Su DF, Duan JL. Arterial baroreflex dysfunction impairs ischemia-induced angiogenesis. J Am Heart Assoc 2014; 3:e000804. [PMID: 24820655 PMCID: PMC4309071 DOI: 10.1161/jaha.114.000804] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Background Endothelium‐derived acetylcholine (eACh) plays an important role in the regulation of vascular actions in response to hypoxia, whereas arterial baroreflex (ABR) dysfunction impairs the eACh system. We investigated the effects of ABR dysfunction on ischemia‐induced angiogenesis in animal models of hindlimb ischemia with a special focus on eACh/nicotinic ACh receptor (nAChR) signaling activation. Methods and Results Male Sprague‐Dawley rats were randomly assigned to 1 of 3 groups that received (1) sham operation (control group), (2) sinoaortic denervation (SAD)‐induced ABR dysfunction (SAD group), or (3) SAD rats on diet with an acetylcholinesterase inhibitor pyridostigmine (30 mg/kg per day, SAD+Pyr group). After 4 weeks of the SAD intervention, unilateral limb ischemia was surgically induced in all animals. At postoperative day 14, SAD rats exhibited impaired angiogenic action (skin temperature and capillary density) and decreased angiogenic factor expressions (vascular endothelial growth factor [VEGF] and hypoxic inducible factor [HIF]‐1α) in ischemic muscles. These changes were restored by acetylcholinesterase inhibition. Rats with ABR dysfunction had lower eACh levels than did control rats, and this effect was recovered in SAD+Pyr rats. In α7‐nAChR knockout mice, pyridostigmine improved ischemia‐induced angiogenic responses and increased the levels of VEGF and HIF‐1α. Moreover, nicotinic receptor blocker inhibited VEGF expression and VEGF receptor 2 phosphorylation (p‐VEGFR2) induced by ACh analog. Conclusions Thus, ABR dysfunction appears to impair ischemia‐induced angiogenesis through the reduction of eACh/α7‐nAChR‐dependent and ‐independent HIF‐1α/VEGF‐VEGFR2 signaling activation.
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Affiliation(s)
- Changning Hao
- Department of Cardiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
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