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Wang Y, Shi Q, Li M, Zhao M, Reddy Gopireddy R, Teoh JP, Xu B, Zhu C, Ireton KE, Srinivasan S, Chen S, Gasser PJ, Bossuyt J, Hell JW, Bers DM, Xiang YK. Intracellular β 1-Adrenergic Receptors and Organic Cation Transporter 3 Mediate Phospholamban Phosphorylation to Enhance Cardiac Contractility. Circ Res 2021; 128:246-261. [PMID: 33183171 PMCID: PMC7856104 DOI: 10.1161/circresaha.120.317452] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
RATIONALE β1ARs (β1-adrenoceptors) exist at intracellular membranes and OCT3 (organic cation transporter 3) mediates norepinephrine entry into cardiomyocytes. However, the functional role of intracellular β1AR in cardiac contractility remains to be elucidated. OBJECTIVE Test localization and function of intracellular β1AR on cardiac contractility. METHODS AND RESULTS Membrane fractionation, super-resolution imaging, proximity ligation, coimmunoprecipitation, and single-molecule pull-down demonstrated a pool of β1ARs in mouse hearts that were associated with sarco/endoplasmic reticulum Ca2+-ATPase at the sarcoplasmic reticulum (SR). Local PKA (protein kinase A) activation was measured using a PKA biosensor targeted at either the plasma membrane (PM) or SR. Compared with wild-type, myocytes lacking OCT3 (OCT3-KO [OCT3 knockout]) responded identically to the membrane-permeant βAR agonist isoproterenol in PKA activation at both PM and SR. The same was true at the PM for membrane-impermeant norepinephrine, but the SR response to norepinephrine was suppressed in OCT3-KO myocytes. This differential effect was recapitulated in phosphorylation of the SR-pump regulator phospholamban. Similarly, OCT3-KO selectively suppressed calcium transients and contraction responses to norepinephrine but not isoproterenol. Furthermore, sotalol, a membrane-impermeant βAR-blocker, suppressed isoproterenol-induced PKA activation at the PM but permitted PKA activation at the SR, phospholamban phosphorylation, and contractility. Moreover, pretreatment with sotalol in OCT3-KO myocytes prevented norepinephrine-induced PKA activation at both PM and the SR and contractility. CONCLUSIONS Functional β1ARs exists at the SR and is critical for PKA-mediated phosphorylation of phospholamban and cardiac contractility upon catecholamine stimulation. Activation of these intracellular β1ARs requires catecholamine transport via OCT3.
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MESH Headings
- Adrenergic beta-Agonists/pharmacology
- Adrenergic beta-Antagonists/pharmacology
- Animals
- Calcium-Binding Proteins/metabolism
- Cell Membrane/metabolism
- Cells, Cultured
- Cyclic AMP-Dependent Protein Kinases/metabolism
- Female
- Heart Rate
- Male
- Mice, Inbred C57BL
- Mice, Knockout
- Myocardial Contraction/drug effects
- Myocytes, Cardiac/drug effects
- Myocytes, Cardiac/metabolism
- Organic Cation Transport Proteins/genetics
- Organic Cation Transport Proteins/metabolism
- Phosphorylation
- Rabbits
- Rats
- Rats, Sprague-Dawley
- Receptors, Adrenergic, beta-1/genetics
- Receptors, Adrenergic, beta-1/metabolism
- Receptors, Adrenergic, beta-2/genetics
- Receptors, Adrenergic, beta-2/metabolism
- Sarcoplasmic Reticulum/metabolism
- Signal Transduction
- Mice
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Affiliation(s)
- Ying Wang
- Department of Pharmacology, University of California at Davis (Y.W., Q.S., M.L., M.Z., R.R.G., J.-P.T., B.X., C.Z., K.E.I., S.S., J.B., J.W.H., D.M.B., Y.K.X.)
| | - Qian Shi
- Department of Pharmacology, University of California at Davis (Y.W., Q.S., M.L., M.Z., R.R.G., J.-P.T., B.X., C.Z., K.E.I., S.S., J.B., J.W.H., D.M.B., Y.K.X.)
| | - Minghui Li
- Department of Pharmacology, University of California at Davis (Y.W., Q.S., M.L., M.Z., R.R.G., J.-P.T., B.X., C.Z., K.E.I., S.S., J.B., J.W.H., D.M.B., Y.K.X.)
- Nanjing First Hospital, Nanjing Medical University, China (M.L., S.C.)
| | - Meimi Zhao
- Department of Pharmacology, University of California at Davis (Y.W., Q.S., M.L., M.Z., R.R.G., J.-P.T., B.X., C.Z., K.E.I., S.S., J.B., J.W.H., D.M.B., Y.K.X.)
- Department of Pharmaceutical Toxicology, China Medical University (M.Z.)
| | - Raghavender Reddy Gopireddy
- Department of Pharmacology, University of California at Davis (Y.W., Q.S., M.L., M.Z., R.R.G., J.-P.T., B.X., C.Z., K.E.I., S.S., J.B., J.W.H., D.M.B., Y.K.X.)
| | - Jian-Peng Teoh
- Department of Pharmacology, University of California at Davis (Y.W., Q.S., M.L., M.Z., R.R.G., J.-P.T., B.X., C.Z., K.E.I., S.S., J.B., J.W.H., D.M.B., Y.K.X.)
| | - Bing Xu
- Department of Pharmacology, University of California at Davis (Y.W., Q.S., M.L., M.Z., R.R.G., J.-P.T., B.X., C.Z., K.E.I., S.S., J.B., J.W.H., D.M.B., Y.K.X.)
- VA Northern California Health Care System, Mather, CA (B.X., Y.K.X.)
| | - Chaoqun Zhu
- Department of Pharmacology, University of California at Davis (Y.W., Q.S., M.L., M.Z., R.R.G., J.-P.T., B.X., C.Z., K.E.I., S.S., J.B., J.W.H., D.M.B., Y.K.X.)
| | - Kyle E Ireton
- Department of Pharmacology, University of California at Davis (Y.W., Q.S., M.L., M.Z., R.R.G., J.-P.T., B.X., C.Z., K.E.I., S.S., J.B., J.W.H., D.M.B., Y.K.X.)
| | - Sanghavi Srinivasan
- Department of Pharmacology, University of California at Davis (Y.W., Q.S., M.L., M.Z., R.R.G., J.-P.T., B.X., C.Z., K.E.I., S.S., J.B., J.W.H., D.M.B., Y.K.X.)
| | - Shaoliang Chen
- Nanjing First Hospital, Nanjing Medical University, China (M.L., S.C.)
| | - Paul J Gasser
- Department of Biomedical Sciences, Marquette University, Milwaukee, WI (P.J.G.)
| | - Julie Bossuyt
- Department of Pharmacology, University of California at Davis (Y.W., Q.S., M.L., M.Z., R.R.G., J.-P.T., B.X., C.Z., K.E.I., S.S., J.B., J.W.H., D.M.B., Y.K.X.)
| | - Johannes W Hell
- Department of Pharmacology, University of California at Davis (Y.W., Q.S., M.L., M.Z., R.R.G., J.-P.T., B.X., C.Z., K.E.I., S.S., J.B., J.W.H., D.M.B., Y.K.X.)
| | - Donald M Bers
- Department of Pharmacology, University of California at Davis (Y.W., Q.S., M.L., M.Z., R.R.G., J.-P.T., B.X., C.Z., K.E.I., S.S., J.B., J.W.H., D.M.B., Y.K.X.)
| | - Yang K Xiang
- Department of Pharmacology, University of California at Davis (Y.W., Q.S., M.L., M.Z., R.R.G., J.-P.T., B.X., C.Z., K.E.I., S.S., J.B., J.W.H., D.M.B., Y.K.X.)
- VA Northern California Health Care System, Mather, CA (B.X., Y.K.X.)
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Van Iterson EH, Snyder EM, Johnson BD, Olson TP. Influence of the Metaboreflex on Pulmonary Vascular Capacitance in Heart Failure. Med Sci Sports Exerc 2017; 48:353-62. [PMID: 26414317 DOI: 10.1249/mss.0000000000000775] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
PURPOSE An impaired metaboreflex is associated with abnormal ventilatory and peripheral vascular function in heart failure (HF), whereas its influence on cardiac function or pulmonary vascular pressure remains unclear. We aimed to assess whether metabolite-sensitive neural feedback (metaboreflex) from locomotor muscles via postexercise regional circulatory occlusion (RCO) attenuates pulmonary vascular capacitance (GXCAP) and/or circulatory power (CircP) in patients with HF. METHODS Eleven patients with HF (NYHA class, I/II; ages, 51 ± 15 yr; ejection fraction, 32% ± 9%) and 11 age- and gender-matched controls (ages, 43 ± 9 yr) completed three cycling sessions (4 min, 60% peak oxygen uptake (V˙O2)). Session 1 was a control trial including normal recovery (NR). Session 2 or 3 included bilateral upper thigh pressure tourniquets inflated suprasystolic at end of exercise (RCO) for 2-min recovery with or without inspired CO2 (RCO + CO2) (randomized). Mean arterial pressure, HR, and V˙O2 were continuously measured. Estimates of central hemodynamics; CircP = (V˙O2 × mean arterial pressure)/weight; oxygen pulse index (O2pulseI = (V˙O2/HR)/body surface area); and GXCAP = O2pulseI × end-tidal partial pressure CO2 were calculated. RESULTS At rest and end of exercise, CircP and GXCAP were lower in HF versus those in controls (P < 0.05), with no differences between transients (P > 0.05). At 2-min recovery, GXCAP was lower during RCO versus that during NR in both groups (72 ± 23 vs 98 ± 20 and 73 ± 34 vs 114 ± 35 mL·beat·mm Hg·m, respectively; P < 0.05), whereas CircP did not differ between transients (P > 0.05). Differences (% and Δ) between baseline and 2-min recovery among transients suggest that metaboreflex attenuates GXCAP in HF. Differences (% and Δ) between baseline and 2-min recovery among transients suggest that metaboreflex may attenuate CircP in controls. CONCLUSIONS The present observations suggest that locomotor muscle metaboreflex activation may influence CircP in controls but not in HF. However, metaboreflex activation may evoke decreases in GXCAP (increased pulmonary vascular pressures) in HF and controls.
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Affiliation(s)
- Erik H Van Iterson
- 1Department of Kinesiology, University of Minnesota, Minneapolis, MN; 2Cardiovascular Medicine Division, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA; and 3Division of Cardiovascular Diseases, Mayo Clinic, Rochester, MN
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Chen PS, Chen LS, Fishbein MC, Lin SF, Nattel S. Role of the autonomic nervous system in atrial fibrillation: pathophysiology and therapy. Circ Res 2014; 114:1500-15. [PMID: 24763467 PMCID: PMC4043633 DOI: 10.1161/circresaha.114.303772] [Citation(s) in RCA: 524] [Impact Index Per Article: 52.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Autonomic nervous system activation can induce significant and heterogeneous changes of atrial electrophysiology and induce atrial tachyarrhythmias, including atrial tachycardia and atrial fibrillation (AF). The importance of the autonomic nervous system in atrial arrhythmogenesis is also supported by circadian variation in the incidence of symptomatic AF in humans. Methods that reduce autonomic innervation or outflow have been shown to reduce the incidence of spontaneous or induced atrial arrhythmias, suggesting that neuromodulation may be helpful in controlling AF. In this review, we focus on the relationship between the autonomic nervous system and the pathophysiology of AF and the potential benefit and limitations of neuromodulation in the management of this arrhythmia. We conclude that autonomic nerve activity plays an important role in the initiation and maintenance of AF, and modulating autonomic nerve function may contribute to AF control. Potential therapeutic applications include ganglionated plexus ablation, renal sympathetic denervation, cervical vagal nerve stimulation, baroreflex stimulation, cutaneous stimulation, novel drug approaches, and biological therapies. Although the role of the autonomic nervous system has long been recognized, new science and new technologies promise exciting prospects for the future.
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Affiliation(s)
- Peng-Sheng Chen
- Krannert Institute of Cardiology and Division of Cardiology, Department of Medicine, Indiana University School of Medicine, Indianapolis, IN
| | - Lan S. Chen
- Department of Neurology, Indiana University School of Medicine, Indianapolis, IN
| | - Michael C. Fishbein
- Department of Pathology and Laboratory Medicine, UCLA, Los Angeles, California, USA
| | - Shien-Fong Lin
- Krannert Institute of Cardiology and Division of Cardiology, Department of Medicine, Indiana University School of Medicine, Indianapolis, IN
- Institute of Biomedical Engineering, National Chiao Tung University, Hsinchu, Taiwan
| | - Stanley Nattel
- Deartment of Medicine, Montreal Heart Institute and Université de Montréal
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Ng J, Villuendas R, Cokic I, Schliamser JE, Gordon D, Koduri H, Benefield B, Simon J, Murthy SNP, Lomasney JW, Wasserstrom JA, Goldberger JJ, Aistrup GL, Arora R. Autonomic remodeling in the left atrium and pulmonary veins in heart failure: creation of a dynamic substrate for atrial fibrillation. Circ Arrhythm Electrophysiol 2011; 4:388-96. [PMID: 21421805 DOI: 10.1161/circep.110.959650] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
BACKGROUND Atrial fibrillation (AF) is commonly associated with congestive heart failure (CHF). The autonomic nervous system is involved in the pathogenesis of both AF and CHF. We examined the role of autonomic remodeling in contributing to AF substrate in CHF. METHODS AND RESULTS Electrophysiological mapping was performed in the pulmonary veins and left atrium in 38 rapid ventricular-paced dogs (CHF group) and 39 control dogs under the following conditions: vagal stimulation, isoproterenol infusion, β-adrenergic blockade, acetylcholinesterase (AChE) inhibition (physostigmine), parasympathetic blockade, and double autonomic blockade. Explanted atria were examined for nerve density/distribution, muscarinic receptor and β-adrenergic receptor densities, and AChE activity. In CHF dogs, there was an increase in nerve bundle size, parasympathetic fibers/bundle, and density of sympathetic fibrils and cardiac ganglia, all preferentially in the posterior left atrium/pulmonary veins. Sympathetic hyperinnervation was accompanied by increases in β(1)-adrenergic receptor R density and in sympathetic effect on effective refractory periods and activation direction. β-Adrenergic blockade slowed AF dominant frequency. Parasympathetic remodeling was more complex, resulting in increased AChE activity, unchanged muscarinic receptor density, unchanged parasympathetic effect on activation direction and decreased effect of vagal stimulation on effective refractory period (restored by AChE inhibition). Parasympathetic blockade markedly decreased AF duration. CONCLUSIONS In this heart failure model, autonomic and electrophysiological remodeling occurs, involving the posterior left atrium and pulmonary veins. Despite synaptic compensation, parasympathetic hyperinnervation contributes significantly to AF maintenance. Parasympathetic and/or sympathetic signaling may be possible therapeutic targets for AF in CHF.
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Affiliation(s)
- Jason Ng
- Feinberg Cardiovascular Research Institute, Northwestern University-Feinberg School of Medicine, Chicago, IL 60611, USA
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12
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Liang C, Rounds NK, Dong E, Stevens SY, Shite J, Qin F. Alterations by norepinephrine of cardiac sympathetic nerve terminal function and myocardial beta-adrenergic receptor sensitivity in the ferret: normalization by antioxidant vitamins. Circulation 2000; 102:96-103. [PMID: 10880421 DOI: 10.1161/01.cir.102.1.96] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Chronic excessive norepinephrine (NE) causes cardiac sympathetic nerve terminal abnormalities, myocardial beta-adrenergic receptor downregulation, and beta-adrenergic subsensitivity. The present study was carried out to determine whether these changes could be prevented by antioxidants. METHODS AND RESULTS Ferrets were administered either NE (1.33 mg/d) or vehicle by use of subcutaneous pellets for 4 weeks. Animals were simultaneously assigned to receive either antioxidant vitamins (beta-carotene, ascorbic acid, and alpha-tocopherol) or placebo pellets. NE increased plasma NE 4- to 5-fold but had no effect on heart rate, heart weight, arterial pressure, or left ventricular systolic function. However, myocardial NE uptake activity and NE uptake-1 site density were reduced, as well as cardiac neuronal NE, tyrosine hydroxylase, and neuropeptide Y. In addition, there was a decrease in myocardial beta-adrenergic receptor density with a selective decrease of the beta(1)-receptor subtype, reduction of the high-affinity site for isoproterenol, decreased basal adenylyl cyclase activity, and the adenylyl cyclase responses to isoproterenol, Gpp(NH)p, and forskolin. All of these changes were prevented by antioxidant vitamins. The effects of NE on myocardial beta-adrenergic receptor density, NE uptake-1 carrier site density, and neuronal NE were also prevented by superoxide dismutase or Trolox C. CONCLUSIONS The toxic effects of NE on the sympathetic nerve terminals are mediated via the formation of NE-derived oxygen free radicals. Preservation of the neuronal NE reuptake mechanism is functionally important, because the antioxidants also prevented myocardial beta-adrenergic receptor downregulation and postreceptor abnormalities. Thus, antioxidant therapy may be beneficial in heart failure, in which cardiac NE release is increased.
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Affiliation(s)
- C Liang
- Cardiology Unit, Department of Medicine, University of Rochester Medical Center, NY 14642-8679, USA.
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