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Stewart LC, Wainman L, Ahmadian M, Duffy J, Seethaler R, Mueller PJ, Eves ND, West CR. The left ventricle increases contractility in response to baroreceptor unloading, which is sympathetically mediated in the anesthetized rat. J Appl Physiol (1985) 2024; 137:136-144. [PMID: 38813608 DOI: 10.1152/japplphysiol.00722.2023] [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: 10/09/2023] [Revised: 05/16/2024] [Accepted: 05/24/2024] [Indexed: 05/31/2024] Open
Abstract
Contemporary discussion of the baroreflex includes the efferent vascular-sympathetic and cardiovagal arms. Since sympathetic postganglionic neurons also innervate the left ventricle (LV), it is often assumed that the LV produces a sympathetically mediated increase in contractility during baroreceptor unloading, but this has not been characterized using a load-independent index of contractility. We aimed to determine 1) whether LV contractility increases in response to baroreceptor unloading and 2) whether such increases are mediated via the sympathetic or parasympathetic arm of the autonomic nervous system. Ten male Wistar rats were anesthetized (urethane) and instrumented with arterial and LV pressure-volume catheters to measure mean arterial pressure (MAP) and load-independent LV contractility [maximal rate of increase in pressure adjusted to end-diastolic volume (PAdP/dtmax)], respectively. Rats were placed in a servo-controlled lower-body negative pressure (LBNP) chamber to reduce MAP by 10% for 60 s to mechanically unload baroreceptors under control conditions. LBNP was repeated in each animal following infusions of cardiac autonomic blockers using esmolol (sympathetic), atropine (parasympathetic), and esmolol + atropine. Under control conditions, PAdP/dtmax increased during baroreceptor unloading (26 ± 6 vs. 31 ± 9 mmHg·s-1·μL-1, P = 0.031). During esmolol, there was no increase in LV contractility during baroreceptor unloading (11 ± 2 vs. 12 ± 2, P = 0.125); however, during atropine, there was an increase in LV contractility during baroreceptor unloading (26 ± 6 vs. 31 ± 9, P = 0.019). During combined esmolol and atropine, there was a small increase in contractility versus control (13 ± 3 vs. 15 ± 4, P = 0.046). Our results demonstrate that, in anesthetized rats, LV contractility increases in response to baroreceptor unloading, which is largely sympathetically mediated.NEW & NOTEWORTHY This study empirically demonstrates a sympathetically mediated increase in LV contractility in response to baroreceptor unloading using a load-independent index of cardiac contractility in the anesthetized rat.
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Affiliation(s)
- Liam C Stewart
- Centre for Chronic Disease Prevention and Management, University of British Columbia, Kelowna, British Columbia, Canada
- Centre for Heart, Lung & Vascular Health, University of British Columbia, Kelowna, British Columbia, Canada
- Faculty of Medicine, Department of Cellular & Physiological Sciences, University of British Columbia, Vancouver, British Columbia, Canada
- International Collaboration on Repair Discoveries, University of British Columbia, Vancouver, British Columbia, Canada
| | - Liisa Wainman
- Centre for Chronic Disease Prevention and Management, University of British Columbia, Kelowna, British Columbia, Canada
- Centre for Heart, Lung & Vascular Health, University of British Columbia, Kelowna, British Columbia, Canada
- Faculty of Medicine, Department of Cellular & Physiological Sciences, University of British Columbia, Vancouver, British Columbia, Canada
- International Collaboration on Repair Discoveries, University of British Columbia, Vancouver, British Columbia, Canada
| | - Mehdi Ahmadian
- Centre for Chronic Disease Prevention and Management, University of British Columbia, Kelowna, British Columbia, Canada
- Centre for Heart, Lung & Vascular Health, University of British Columbia, Kelowna, British Columbia, Canada
- Faculty of Education, School of Kinesiology, University of British Columbia, Vancouver, British Columbia, Canada
- International Collaboration on Repair Discoveries, University of British Columbia, Vancouver, British Columbia, Canada
| | - Jennifer Duffy
- Centre for Chronic Disease Prevention and Management, University of British Columbia, Kelowna, British Columbia, Canada
- Centre for Heart, Lung & Vascular Health, University of British Columbia, Kelowna, British Columbia, Canada
- Faculty of Medicine, Department of Cellular & Physiological Sciences, University of British Columbia, Vancouver, British Columbia, Canada
- International Collaboration on Repair Discoveries, University of British Columbia, Vancouver, British Columbia, Canada
| | - Rudolph Seethaler
- School of Engineering, University of British Columbia Okanagan, Kelowna, British Columbia, Canada
| | - Patrick J Mueller
- Department of Physiology, School of Medicine, Wayne State University, Detroit, Michigan, United States
| | - Neil D Eves
- Centre for Heart, Lung & Vascular Health, University of British Columbia, Kelowna, British Columbia, Canada
- Faculty of Health and Social Development, School of Health and Exercise Sciences, University of British Columbia, Kelowna, British Columbia, Canada
| | - Christopher R West
- Centre for Chronic Disease Prevention and Management, University of British Columbia, Kelowna, British Columbia, Canada
- Centre for Heart, Lung & Vascular Health, University of British Columbia, Kelowna, British Columbia, Canada
- Faculty of Medicine, Department of Cellular & Physiological Sciences, University of British Columbia, Vancouver, British Columbia, Canada
- International Collaboration on Repair Discoveries, University of British Columbia, Vancouver, British Columbia, Canada
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Florman JT, Alkema MJ. Co-transmission of neuropeptides and monoamines choreograph the C. elegans escape response. PLoS Genet 2022; 18:e1010091. [PMID: 35239681 PMCID: PMC8932558 DOI: 10.1371/journal.pgen.1010091] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 03/18/2022] [Accepted: 02/11/2022] [Indexed: 11/19/2022] Open
Abstract
Co-localization and co-transmission of neurotransmitters and neuropeptides is a core property of neural signaling across species. While co-transmission can increase the flexibility of cellular communication, understanding the functional impact on neural dynamics and behavior remains a major challenge. Here we examine the role of neuropeptide/monoamine co-transmission in the orchestration of the C. elegans escape response. The tyraminergic RIM neurons, which coordinate distinct motor programs of the escape response, also co-express the neuropeptide encoding gene flp-18. We find that in response to a mechanical stimulus, flp-18 mutants have defects in locomotory arousal and head bending that facilitate the omega turn. We show that the induction of the escape response leads to the release of FLP-18 neuropeptides. FLP-18 modulates the escape response through the activation of the G-protein coupled receptor NPR-5. FLP-18 increases intracellular calcium levels in neck and body wall muscles to promote body bending. Our results show that FLP-18 and tyramine act in different tissues in both a complementary and antagonistic manner to control distinct motor programs during different phases of the C. elegans flight response. Our study reveals basic principles by which co-transmission of monoamines and neuropeptides orchestrate in arousal and behavior in response to stress.
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Affiliation(s)
- Jeremy T. Florman
- Department of Neurobiology, UMass Chan Medical School, Worcester, Massachusetts, United States of America
| | - Mark J. Alkema
- Department of Neurobiology, UMass Chan Medical School, Worcester, Massachusetts, United States of America
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Makowska K, Gonkowski S. Changes Caused by Low Doses of Bisphenol A (BPA) in the Neuro-Chemistry of Nerves Located in the Porcine Heart. Animals (Basel) 2021; 11:ani11030780. [PMID: 33799766 PMCID: PMC7999793 DOI: 10.3390/ani11030780] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 03/07/2021] [Accepted: 03/08/2021] [Indexed: 12/20/2022] Open
Abstract
Simple Summary Bisphenol A (BPA) is a substance commonly used in the plastics industry, which is a part of many everyday items. It may leach from plastics and penetrate food, water, soil and air. It is known that BPA negatively affects living organisms. It impairs the functions of the intestine, neurons, reproductive organs, endocrine glands and immune cells. Previous studies have also reported that BPA negatively influences the cardiovascular system, leading to heart arrhythmia, intensification of atherosclerosis, blood hypertension and increased risk of a heart attack. However, many aspects of the influence of BPA on the heart are still poorly understood. One of these aspects is the BPA impact on heart innervation. Therefore, this article aimed to investigate the influence of low doses of BPA on the number of nerves containing selected active substances taking part in neuronal stimuli conduction located in the porcine heart apex. The results indicate that even relatively low doses of BPA are not neutral to the cardiovascular system, because they affect the neurochemical characterization of nerves in the heart. These changes may underlie the negative effects of BPA on the heart. Abstract Bisphenol A (BPA) contained in plastics used in the production of various everyday objects may leach from these items and contaminate food, water and air. As an endocrine disruptor, BPA negatively affects many internal organs and systems. Exposure to BPA also contributes to heart and cardiovascular system dysfunction, but many aspects connected with this activity remain unknown. Therefore, this study aimed to investigate the impact of BPA in a dose of 0.05 mg/kg body weight/day (in many countries such a dose is regarded as a tolerable daily intake–TDI dose of BPA–completely safe for living organisms) on the neurochemical characterization of nerves located in the heart wall using the immunofluorescence technique. The obtained results indicate that BPA (even in such a relatively low dose) increases the number of nerves immunoreactive to neuropeptide Y, substance P and tyrosine hydroxylase (used here as a marker of sympathetic innervation). However, BPA did not change the number of nerves immunoreactive to vesicular acetylcholine transporter (used here as a marker of cholinergic structures). These observations suggest that changes in the heart innervation may be at the root of BPA-induced circulatory disturbances, as well as arrhythmogenic and/or proinflammatory effects of this endocrine disruptor. Moreover, changes in the neurochemical characterization of nerves in the heart wall may be the first sign of exposure to BPA.
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Affiliation(s)
- Krystyna Makowska
- Department of Clinical Diagnostics, Faculty of Veterinary Medicine, University of Warmia and Mazury in Olsztyn, Oczapowskiego 14, 10-957 Olsztyn, Poland
- Correspondence: ; Tel.: +48-44895234460
| | - Slawomir Gonkowski
- Department of Clinical Physiology, Faculty of Veterinary Medicine, University of Warmia and Mazury in Olsztyn, Oczapowskiego 13, 10-957 Olsztyn, Poland;
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Xie Y, Hu J, Zhang X, Li C, Zuo Y, Xie S, Zhang Z, Zhu S. Neuropeptide Y Induces Cardiomyocyte Hypertrophy via Attenuating miR-29a-3p in Neonatal Rat Cardiomyocytes. Protein Pept Lett 2021; 27:878-887. [PMID: 32297569 DOI: 10.2174/0929866527666200416144459] [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: 12/19/2019] [Revised: 03/02/2020] [Accepted: 03/05/2020] [Indexed: 02/08/2023]
Abstract
BACKGROUND Neuropeptide Y (NPY) has been well known to induce Cardiomyocyte Hypertrophy (CH), which is possibly caused by disruption of cardiac cell energy balance. As mitochondria is losely related to energy metabolism, in this study, we investigated the changes in mitochondrial Dynamics-related protein (Drp1) expression under the action of NPY. miRNA-29a, a endogenous noncoding small molecule RNA which is involved in many cardiac diseases, by using a bioinformatics tool, we found a potential binding site of miRNA-29a on the Drp1 mRNA, and suggesting that miRNA-29a might play a regulatory role. OBJECTIVE To investigate the role of miR-29a-3p in the process of NPY-induced CH, and further explore it's predicted relationship with Drp1. METHODS The expression levels of miR-29a-3p and Atrial Natriuretic Peptide (ANP) were performed by the method of fluorescence quantitative PCR, in addition, expression of Drp1 in treated and control groups were performed by western blot analysis.] Results: We found NPY leads to the CH and up-regulation of ANP expression levels. We also found significant up-regulation of Drp1 expression and down-regulation of miR-29a-3p expression in NPY-treated cells. The decrease in miR-29a-3p expression may lead the increase expression level of Drp1. We found that the expression of ANP increased after NPY treatment. When Drp1 protein was silenced, the high expression of ANP was inhibited. CONCLUSION In this study, we found up-regulation of Drp1 in cells treated with NPY. Drp1 mRNA is a predicted target for miR-29a-3p, and the expression of Drp1 was attenuated by miR-29a-3p. Therefore, NPY leads to down-regulation of miR-29a-3p expression, up-regulation of Drp1 expression, and NPY leads to CH. Correspondingly, miR-29a-3p can counteract the effects of NPY. This may be a new way, which could be used in diagnosis and treatment plan for CH.
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Affiliation(s)
- Yuxin Xie
- Department of Forensic Medicine, Medical College of Soochow University, Suzhou, Jiangsu 215123, China
| | - Jun Hu
- Department of Forensic Medicine, Medical College of Soochow University, Suzhou, Jiangsu 215123, China
| | - Xincai Zhang
- Department of Forensic Medicine, Medical College of Soochow University, Suzhou, Jiangsu 215123, China
| | - Chunxiao Li
- Department of Forensic Expertise, De'an Hospital, Changzhou, Jiangsu 213000, China
| | - Yuanyi Zuo
- Department of Forensic Medicine, Medical College of Soochow University, Suzhou, Jiangsu 215123, China
| | - Shining Xie
- Department of Forensic Medicine, Medical College of Soochow University, Suzhou, Jiangsu 215123, China
| | - Zhixiang Zhang
- Department of Forensic Medicine, Medical College of Soochow University, Suzhou, Jiangsu 215123, China
| | - Shaohua Zhu
- Department of Forensic Medicine, Medical College of Soochow University, Suzhou, Jiangsu 215123, China
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Wang J, Hao D, Zeng L, Zhang Q, Huang W. Neuropeptide Y mediates cardiac hypertrophy through microRNA-216b/FoxO4 signaling pathway. Int J Med Sci 2021; 18:18-28. [PMID: 33390770 PMCID: PMC7738963 DOI: 10.7150/ijms.51133] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/26/2020] [Accepted: 10/13/2020] [Indexed: 01/13/2023] Open
Abstract
Cardiac hypertrophy (CH) is a major risk factor for heart failure accompanied by maladaptive cardiac remodeling. The role and potential mechanism of neuropeptide Y (NPY) in CH are still unclear. We will explore the role and the mechanism of NPY inactivation (NPY-I) in CH caused by pressure overload. Abdominal aortic constriction (AAC) was used to induce CH model in rats. NPY or angiotensin II (Ang II) was used to trigger CH model in vitro in neonatal rat ventricular myocytes (NRVMs). We found that NPY was increased in the heart and plasma of hypertrophic rats. However, Ang II did not increase NPY expression in cardiomyocytes. NPY-I attenuated CH as decreasing CH-related markers (ANP, BNP and β-MHC mRNA) level, reducing cell surface area, and restoring cardiac function. NPY inactivation increased miR-216b and decreased FoxO4 expression in CH heart. Moreover, NPY decreased miR-216b and increased FoxO4 expression in NRVMs which were reversed by NPY type 1 receptor (NPY1R) antagonist BIBO3304. MiR-216b mimic and FoxO4 siRNA (small interfering RNA) inhibited NPY/Ang II-induced myocardial hypertrophy in vitro. Meanwhile, BIBO3304 reversed the pro-hypertrophy effect of NPY in vitro. Collectively, NPY deficiency attenuated CH by NPY1R-miR-216b-FoxO4 axis. These findings suggested that NPY would be a potential therapeutic target for the prevention and treatment of cardiac hypertrophy.
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Affiliation(s)
- Jinghao Wang
- Department of Pharmacy, the First Affiliated Hospital, Jinan University, Guangzhou 510630, China
| | - Dan Hao
- Department of Cardiology, the First Hospital of Harbin, Harbin 150010, China
| | - Lingfeng Zeng
- Department of Pharmacy, the First Affiliated Hospital, Jinan University, Guangzhou 510630, China
| | - Qianhui Zhang
- Department of Pharmacology, Harbin Medical University-Daqing, Daqing, Heilongjiang 163319, China
| | - Wei Huang
- Department of Pharmacology, Harbin Medical University-Daqing, Daqing, Heilongjiang 163319, China
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Haj-Yehia E, Mertens RW, Kahles F, Rückbeil MV, Rau M, Moellmann J, Biener M, Almalla M, Schroeder J, Giannitsis E, Katus HA, Marx N, Lehrke M. Peptide YY (PYY) Is Associated with Cardiovascular Risk in Patients with Acute Myocardial Infarction. J Clin Med 2020; 9:E3952. [PMID: 33291235 PMCID: PMC7762108 DOI: 10.3390/jcm9123952] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 12/02/2020] [Accepted: 12/03/2020] [Indexed: 02/07/2023] Open
Abstract
AIMS Recent studies have found circulating concentrations of the gastrointestinal hormone GLP-1 to be an excellent predictor of cardiovascular risk in patients with myocardial infarction. This illustrates a yet not appreciated crosstalk between the gastrointestinal and cardiovascular systems, which requires further investigation. The gut-derived hormone Peptide YY (PYY) is secreted from the same intestinal L-cells as GLP-1. Relevance of PYY in the context of cardiovascular disease has not been explored. In this study, we aimed to investigate PYY serum concentrations in patients with acute myocardial infarction and to evaluate their association with cardiovascular events. MATERIAL AND METHODS PYY levels were assessed in 834 patients presenting with acute myocardial infarction (553 Non-ST-Elevation Myocardial Infarction (NSTEMI) and 281 ST-Elevation Myocardial Infarction (STEMI)) at the time of hospital admission. The composite outcomes of first occurrence of cardiovascular death, nonfatal myocardial infarction, nonfatal stroke (3-P-MACE), and all-cause mortality were assessed with a median follow-up of 338 days. RESULTS PYY levels were significantly associated with age and cardiovascular risk factors, including hypertension, diabetes, and kidney function in addition to biomarkers of heart failure (NT-pro BNP) and inflammation (hs-CRP). Further, PYY was significantly associated with 3-P-MACE (HR: 1.7; 95% CI: 1-2.97; p = 0.0495) and all-cause mortality (HR: 2.69; 95% CI: 1.61-4.47; p = 0.0001) by univariable Cox regression analyses, which was however lost after adjusting for multiple confounders. CONCLUSIONS PYY levels are associated with parameters of cardiovascular risk as well as cardiovascular events and mortality in patients presenting with acute myocardial infarction. However, this significant association is lost after adjustment for further confounders.
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Affiliation(s)
- Elias Haj-Yehia
- Department of Internal Medicine I-Cardiology, University Hospital Aachen, Pauwelsstraße 30, 52074 Aachen, Germany; (E.H.-Y.); (R.W.M.); (F.K.); (M.R.); (J.M.); (M.A.); (J.S.); (N.M.)
| | - Robert Werner Mertens
- Department of Internal Medicine I-Cardiology, University Hospital Aachen, Pauwelsstraße 30, 52074 Aachen, Germany; (E.H.-Y.); (R.W.M.); (F.K.); (M.R.); (J.M.); (M.A.); (J.S.); (N.M.)
| | - Florian Kahles
- Department of Internal Medicine I-Cardiology, University Hospital Aachen, Pauwelsstraße 30, 52074 Aachen, Germany; (E.H.-Y.); (R.W.M.); (F.K.); (M.R.); (J.M.); (M.A.); (J.S.); (N.M.)
| | - Marcia Viviane Rückbeil
- Department of Medical Statistics, University Hospital Aachen, Pauwelsstraße 19, 52074 Aachen, Germany;
| | - Matthias Rau
- Department of Internal Medicine I-Cardiology, University Hospital Aachen, Pauwelsstraße 30, 52074 Aachen, Germany; (E.H.-Y.); (R.W.M.); (F.K.); (M.R.); (J.M.); (M.A.); (J.S.); (N.M.)
| | - Julia Moellmann
- Department of Internal Medicine I-Cardiology, University Hospital Aachen, Pauwelsstraße 30, 52074 Aachen, Germany; (E.H.-Y.); (R.W.M.); (F.K.); (M.R.); (J.M.); (M.A.); (J.S.); (N.M.)
| | - Moritz Biener
- Department of Cardiology, Angiology, and Pneumology, Heidelberg University Hospital, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany; (M.B.); (E.G.); (H.A.K.)
| | - Mohammad Almalla
- Department of Internal Medicine I-Cardiology, University Hospital Aachen, Pauwelsstraße 30, 52074 Aachen, Germany; (E.H.-Y.); (R.W.M.); (F.K.); (M.R.); (J.M.); (M.A.); (J.S.); (N.M.)
| | - Jörg Schroeder
- Department of Internal Medicine I-Cardiology, University Hospital Aachen, Pauwelsstraße 30, 52074 Aachen, Germany; (E.H.-Y.); (R.W.M.); (F.K.); (M.R.); (J.M.); (M.A.); (J.S.); (N.M.)
| | - Evangelos Giannitsis
- Department of Cardiology, Angiology, and Pneumology, Heidelberg University Hospital, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany; (M.B.); (E.G.); (H.A.K.)
| | - Hugo Albert Katus
- Department of Cardiology, Angiology, and Pneumology, Heidelberg University Hospital, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany; (M.B.); (E.G.); (H.A.K.)
| | - Nikolaus Marx
- Department of Internal Medicine I-Cardiology, University Hospital Aachen, Pauwelsstraße 30, 52074 Aachen, Germany; (E.H.-Y.); (R.W.M.); (F.K.); (M.R.); (J.M.); (M.A.); (J.S.); (N.M.)
| | - Michael Lehrke
- Department of Internal Medicine I-Cardiology, University Hospital Aachen, Pauwelsstraße 30, 52074 Aachen, Germany; (E.H.-Y.); (R.W.M.); (F.K.); (M.R.); (J.M.); (M.A.); (J.S.); (N.M.)
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Tan CMJ, Green P, Tapoulal N, Lewandowski AJ, Leeson P, Herring N. The Role of Neuropeptide Y in Cardiovascular Health and Disease. Front Physiol 2018; 9:1281. [PMID: 30283345 PMCID: PMC6157311 DOI: 10.3389/fphys.2018.01281] [Citation(s) in RCA: 115] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Accepted: 08/24/2018] [Indexed: 12/20/2022] Open
Abstract
Neuropeptide Y (NPY) is an abundant sympathetic co-transmitter, widely found in the central and peripheral nervous systems and with diverse roles in multiple physiological processes. In the cardiovascular system it is found in neurons supplying the vasculature, cardiomyocytes and endocardium, and is involved in physiological processes including vasoconstriction, cardiac remodeling, and angiogenesis. It is increasingly also implicated in cardiovascular disease pathogenesis, including hypertension, atherosclerosis, ischemia/infarction, arrhythmia, and heart failure. This review will focus on the physiological and pathogenic role of NPY in the cardiovascular system. After summarizing the NPY receptors which predominantly mediate cardiovascular actions, along with their signaling pathways, individual disease processes will be considered. A thorough understanding of these roles may allow therapeutic targeting of NPY and its receptors.
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Affiliation(s)
- Cheryl M J Tan
- Oxford Cardiovascular Clinical Research Facility, Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Peregrine Green
- Department of Physiology, Anatomy and Genetics, Burdon Sanderson Cardiac Science Centre, University of Oxford, Oxford, United Kingdom
| | - Nidi Tapoulal
- Department of Physiology, Anatomy and Genetics, Burdon Sanderson Cardiac Science Centre, University of Oxford, Oxford, United Kingdom
| | - Adam J Lewandowski
- Oxford Cardiovascular Clinical Research Facility, Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Paul Leeson
- Oxford Cardiovascular Clinical Research Facility, Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Neil Herring
- Department of Physiology, Anatomy and Genetics, Burdon Sanderson Cardiac Science Centre, University of Oxford, Oxford, United Kingdom
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NPY Impairs Cell Viability and Mitochondrial Membrane Potential Through Ca2+ and p38 Signaling Pathways in Neonatal Rat Cardiomyocytes. J Cardiovasc Pharmacol 2018; 70:52-59. [PMID: 28437279 DOI: 10.1097/fjc.0000000000000493] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
NPY is involved in stress cardiomyopathy. However, the associated mechanism for NPY-induced stress cardiomyopathy remains unclear. In this study, we aimed to explore potential cell signaling pathways that are related to NPY-mediated cell viability in neonatal rat cardiomyocytes. We found that NPY induced cell viability suppression in cultured cardiomyocytes in a dose-dependent manner. After NPY treatment, expression of CaN and p-CAMKII increased significantly, and phosphorylation of p38 but not ERK and JNK was changed. Moreover, NPY treatment significantly increased PGC-1α (the key factor of mitochondrial biogenesis and energy metabolism) expression but decreased mitochondrial membrane potential in cultured cardiomyocytes. More importantly, the blockage of CaN, CAMKII, and p38 signaling pathways by their inhibitors could rescue the reduced cell viability and mitochondrial membrane potential in NPY-treated cardiomyocytes. Collectively, our data demonstrated that NPY mediated cell viability and mitochondrial membrane potential in cardiomyocytes through CaN, CAMKII, and p38 signaling pathways.
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Masliukov PM, Moiseev K, Emanuilov AI, Anikina TA, Zverev AA, Nozdrachev AD. Development of neuropeptide Y-mediated heart innervation in rats. Neuropeptides 2016; 55:47-54. [PMID: 26589184 DOI: 10.1016/j.npep.2015.10.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Revised: 10/10/2015] [Accepted: 10/11/2015] [Indexed: 11/24/2022]
Abstract
Neuropeptide Y (NPY) plays a trophic role in the nervous and vascular systems and in cardiac hypertrophy. However, there is no report concerning the expression of NPY and its receptors in the heart during postnatal development. In the current study, immunohistochemistry and Western blot analysis was used to label NPY, and Y1R, Y2R, and Y5R receptors in the heart tissue and intramural cardiac ganglia from rats of different ages (newborn, 10 days old, 20 days old, 30 days old, 60 days old, 1 year old, and 2 years old).The obtained data suggest age-dependent changes of NPY-mediated heart innervation. The density of NPY-immunoreactive (IR) fibers was the least in newborn animals and increased in the first 20 days of life. In the atria of newborn and 10-day-old rats, NPY-IR fibers were more abundant compared with the ventricles. The vast majority of NPY-IR fibers also contained tyrosine hydroxylase, a key enzyme in catecholamine synthesis.The expression of Y1R increased between 10 and 20 days of life. Faint Y2R immunoreactivity was observed in the atria and ventricles of 20-day-old and older rats. In contrast, the highest level of the expression of Y5R was found in newborn pups comparing with more adult rats. All intramural ganglionic neurons were also Y1R-IR and Y5R-IR and Y2R-negative in all studied animals.Thus, the increasing of density of NPY-containing nerve fibers accompanies changes in relation of different subtypes of NPY receptors in the heart during development.
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Affiliation(s)
- Petr M Masliukov
- Department of Normal Physiology, Yaroslavl State Medical University, ul. Revolucionnaya, 5, Yaroslavl 150000, Russia.
| | - Konstantin Moiseev
- Department of Normal Physiology, Yaroslavl State Medical University, ul. Revolucionnaya, 5, Yaroslavl 150000, Russia
| | - Andrey I Emanuilov
- Department of Normal Physiology, Yaroslavl State Medical University, ul. Revolucionnaya, 5, Yaroslavl 150000, Russia
| | - Tatyana A Anikina
- Department of Anatomy, Physiology and Healthcare, Kazan (Volga Region) Federal University, Kremlyovskaya St. 18, Kazan 420008, Russia
| | - Alexey A Zverev
- Department of Anatomy, Physiology and Healthcare, Kazan (Volga Region) Federal University, Kremlyovskaya St. 18, Kazan 420008, Russia
| | - Alexandr D Nozdrachev
- Department of Physiology, Saint Petersburg State University, Universitetskaya nab., 7-9, Saint-Petersburg 199034, Russia
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Lo Vasco VR, Leopizzi M, Puggioni C, Della Rocca C, Businaro R. Neuropeptide Y reduces the expression of PLCB2, PLCD1 and selected PLC genes in cultured human endothelial cells. Mol Cell Biochem 2014; 394:43-52. [PMID: 24903829 DOI: 10.1007/s11010-014-2079-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Accepted: 05/03/2014] [Indexed: 12/11/2022]
Abstract
Endothelial cells (EC) are the first elements exposed to mediators circulating in the bloodstream, and react to stimulation with finely tuned responses mediated by different signal transduction pathways, leading the endothelium to adapt. Neuropeptide Y (NPY), the most abundant peptide in heart and brain, is mainly involved in the neuroendocrine regulation of the stress response. The regulatory roles of NPY depend on many factors, including its enzymatic processing, receptor subtypes and related signal transduction systems, including the phosphoinositide (PI) pathway and related phospholipase C (PI-PLC) family of enzymes. The panel of expression of PI-PLC enzymes differs comparing quiescent versus differently stimulated human EC. Growing evidences indicate that the regulation of the expression of PLC genes, which codify for PI-PLC enzymes, might act as an additional mechanism of control of the PI signal transduction pathway. NPY was described to potentiate the activation of PI-PLC enzymes in different cell types, including EC. In the present experiments, we stimulated human umbilical vein EC using different doses of NPY in order to investigate a possible role upon the expression PLC genes. NPY reduced the overall transcription of PLC genes, excepting for PLCE. The most significant effects were observed for PLCB2 and PLCD1, both isoforms recruited by means of G-proteins and G-protein-coupled receptors. NPY behavior was comparable with other PI-PLC interacting molecules that, beside the stimulation of phospholipase activity, also affect the upcoming enzymes' production acting upon gene expression. That might represent a mode to regulate the activity of PI-PLC enzymes after activation.
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Affiliation(s)
- V R Lo Vasco
- Department Organi di Senso, Policlinico Umberto I, Faculty of Medicina e Odontoiatria, Sapienza University of Rome, viale del Policlinico 155, 00185, Rome, Italy,
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Abstract
Cardiovascular autonomic neuropathy (CAN), in which patients present with damage of autonomic nerve fibres, is one of the most common complications of diabetes. CAN leads to abnormalities in heart rate and vascular dynamics, which are features of diabetic heart failure. Dysregulated neurohormonal activation, an outcome of diabetic neuropathy, has a significant pathophysiological role in diabetes-associated cardiovascular disease. Key players in neurohormonal activation include cardioprotective neuropeptides and their receptors, such as substance P (SP), neuropeptide Y (NPY), calcitonin-gene-related peptide (CGRP), atrial natriuretic peptide (ANP), brain natriuretic peptide (BNP) and C-type natriuretic peptide (CNP). These neuropeptides are released from the peripheral or autonomic nervous system and have vasoactive properties. They are further implicated in cardiomyocyte hypertrophy, calcium homeostasis, ischaemia-induced angiogenesis, protein kinase C signalling and the renin-angiotensin-aldosterone system. Therefore, dysregulation of the expression of neuropeptides or activation of the neuropeptide signalling pathways can negatively affect cardiac homeostasis. Targeting neuropeptides and their signalling pathways might thus serve as new therapeutic interventions in the treatment of heart failure associated with diabetes. This review discusses how neuropeptide dysregulation in diabetes might affect cardiac functions that contribute to the development of heart failure.
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Elevated serum levels of neuropeptide Y in stress cardiomyopathy. Int J Cardiol 2010; 147:155-7. [PMID: 20557961 DOI: 10.1016/j.ijcard.2010.05.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2010] [Accepted: 05/16/2010] [Indexed: 11/20/2022]
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Chottová Dvoráková M, Wiegand S, Pesta M, Slavíková J, Grau V, Reischig J, Kuncová J, Kummer W. Expression of neuropeptide Y and its receptors Y1 and Y2 in the rat heart and its supplying autonomic and spinal sensory ganglia in experimentally induced diabetes. Neuroscience 2008; 151:1016-28. [DOI: 10.1016/j.neuroscience.2007.07.069] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2006] [Revised: 07/12/2007] [Accepted: 12/06/2007] [Indexed: 12/27/2022]
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Abstract
We briefly survey the current knowledge and concepts regarding structure and function of the neuropeptide Y Y2 receptor and its agonists, especially as related to pharmacology of the receptor and its roles in pathological processes. Specific structural features are considered that could be responsible for the known compartmentalization and participation of the receptor in cell and tissue organization. This is further discussed in relation to changes of levels of the Y2 receptor in pathological conditions (especially in epilepsy and drug abuse), to endocytosis and recycling, and to participation in wound healing, retinopathy and angiogenesis. Properties of the receptor and of Y2 agonists are considered and reviewed in connection to the negative regulation of transmitter release, feeding, mood and social behavior. The possible involvement of the Y2 receptor in diabetes, carcinogenesis and bone formation is also reviewed.
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Affiliation(s)
- S L Parker
- Department of Pharmacology, College of Medicine, University of Tennessee Health Science Center, Memphis, TN 38163, USA.
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