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Shevelev AY, Kashirina NM, Lipatova LN, Yanushevskaya EV, Peklo MM, Rybalkin IN, Rutkevich PN, Chusovitina OK, Skoblova NA, Skoblov YS, Vlasik TN, Zykov KA. Radioligand Binding Assay for the Simultaneous Determination of β1- and β2-Adrenergic Receptors in Human Blood Cells. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2022. [DOI: 10.1134/s1068162022050211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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2
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Peters EL, Bogaard HJ, Vonk Noordegraaf A, de Man FS. Neurohormonal modulation in pulmonary arterial hypertension. Eur Respir J 2021; 58:13993003.04633-2020. [PMID: 33766951 PMCID: PMC8551560 DOI: 10.1183/13993003.04633-2020] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Accepted: 03/13/2021] [Indexed: 12/15/2022]
Abstract
Pulmonary hypertension is a fatal condition of elevated pulmonary pressures, complicated by right heart failure. Pulmonary hypertension appears in various forms; one of those is pulmonary arterial hypertension (PAH) and is particularly characterised by progressive remodelling and obstruction of the smaller pulmonary vessels. Neurohormonal imbalance in PAH patients is associated with worse prognosis and survival. In this back-to-basics article on neurohormonal modulation in PAH, we provide an overview of the pharmacological and nonpharmacological strategies that have been tested pre-clinically and clinically. The benefit of neurohormonal modulation strategies in PAH patients has been limited by lack of insight into how the neurohormonal system is changed throughout the disease and difficulties in translation from animal models to human trials. We propose that longitudinal and individual assessments of neurohormonal status are required to improve the timing and specificity of neurohormonal modulation strategies. Ongoing developments in imaging techniques such as positron emission tomography may become helpful to determine neurohormonal status in PAH patients in different disease stages and optimise individual treatment responses.
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Affiliation(s)
- Eva L Peters
- Dept of Pulmonology, Amsterdam UMC, Amsterdam, The Netherlands.,Dept of Physiology, Amsterdam UMC, Amsterdam, The Netherlands
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3
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Rodríguez-Serrano M, Rueda Soriano J, Buendía Fuentes F, Osa Sáez AM, Montó Guillot F, D’Ocon Navaza P, Aguero J, Oliver E, Serrano F, Martínez-Dolz L. Cambios en la expresión de adrenoceptores y GRK en pacientes con insuficiencia pulmonar valvular crónica. Rev Esp Cardiol (Engl Ed) 2019. [DOI: 10.1016/j.recesp.2018.05.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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4
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Endothelial Dysfunction in Chronic Heart Failure: Assessment, Findings, Significance, and Potential Therapeutic Targets. Int J Mol Sci 2019; 20:ijms20133198. [PMID: 31261886 PMCID: PMC6651535 DOI: 10.3390/ijms20133198] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Revised: 06/13/2019] [Accepted: 06/25/2019] [Indexed: 12/11/2022] Open
Abstract
Chronic heart failure (CHF) is a complex syndrome that results from structural and functional disturbances that affect the ability of the heart to supply oxygen to tissues. It largely affects and reduces the patient's quality of life, socio-economic status, and imposes great costs on health care systems worldwide. Endothelial dysfunction (ED) is a newly discovered phenomenon that contributes greatly to the pathophysiology of numerous cardiovascular conditions and commonly co-exists with chronic heart failure. However, the literature lacks clarity as to which heart failure patients might be affected, its significance in CHF patients, and its reversibility with pharmacological and non-pharmacological means. This review will emphasize all these points and summarize them for future researchers interested in vascular pathophysiology in this particular patient population. It will help to direct future studies for better characterization of these two phenomena for the potential discovery of therapeutic targets that might reduce future morbidity and mortality in this "at risk" population.
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5
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Rodriguez-Serrano M, Rueda J, Buendía F, Monto F, Aguero J, Osa A, Cano O, Martínez-Dolz L, D'Ocon P. β2-Adrenoceptors and GRK2 as Potential Biomarkers in Patients With Chronic Pulmonary Regurgitation. Front Pharmacol 2019; 10:93. [PMID: 30837872 PMCID: PMC6390728 DOI: 10.3389/fphar.2019.00093] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Accepted: 01/24/2019] [Indexed: 01/11/2023] Open
Abstract
Pulmonary regurgitation (PR) is a frequent complication after repair of congenital heart disease. Three different GRK isoforms (GRK2, GRK5, and GRK3) and two β-adrenoceptors (β1-AR and β2-AR) are present in peripheral blood mononuclear cells (PBMC) and their expression changes as a consequence of the hemodynamic and neurohumoral alterations that occur in some cardiovascular diseases. Therefore, they could be useful as biomarkers in PR. A prospective study was conducted to describe the expression (TaqMan Gene Expression Assays) of β-ARs and GRKs in PBMC isolated (Ficoll® gradient) from patients with severe PR before and after pulmonary valve replacement and establish if this expression correlates to clinical status. 23 patients with severe PR were included and compared with 22 healthy volunteers (controls). PR patients before the PVR had a significantly lower expression of β2-AR (513.8 ± 261.2 mRNA copies) vs. controls (812.5 ± 497.2 mRNA copies), so as GRK2 expression (503.4 ± 364.9 copies vs. 858.1 ± 380.3 mRNA copies). The expression of β2-AR and GRK2 significantly decreases in symptomatic and asymptomatic patients, as well as in patients under treatment with beta-blockers and non-treated patients. The expression of β2-AR and GRK2 in PR patients recovers the normal values after pulmonary valve replacement (754,8 ± 77,1 and 897,8 ± 87,4 copies, respectively). Therefore, changes in the expression of β2-AR and GRK2 in PBMC of PR patients, could be considered as potential biomarkers to determine clinical decisions.
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Affiliation(s)
| | - Joaquín Rueda
- Servicio de Cardiología, Hospital Universitario y Politécnico La Fe, Valencia, Spain
| | - Francisco Buendía
- Servicio de Cardiología, Hospital Universitario y Politécnico La Fe, Valencia, Spain
| | - Fermi Monto
- Departamento de Farmacología, Facultad de Farmacia, Universitat de València, Valencia, Spain.,Estructura de Recerca Interdisciplinar en Biotecnologia i Biomedicina (ERI BIOTECMED), Universitat de València, Valencia, Spain
| | - Jaime Aguero
- Servicio de Cardiología, Hospital Universitario y Politécnico La Fe, Valencia, Spain.,Área de Fisiopatología del Miocardio, Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), Madrid, Spain
| | - Ana Osa
- Servicio de Cardiología, Hospital Universitario y Politécnico La Fe, Valencia, Spain
| | - Oscar Cano
- Servicio de Cardiología, Hospital Universitario y Politécnico La Fe, Valencia, Spain
| | - Luis Martínez-Dolz
- Servicio de Cardiología, Hospital Universitario y Politécnico La Fe, Valencia, Spain
| | - Pilar D'Ocon
- Departamento de Farmacología, Facultad de Farmacia, Universitat de València, Valencia, Spain.,Estructura de Recerca Interdisciplinar en Biotecnologia i Biomedicina (ERI BIOTECMED), Universitat de València, Valencia, Spain
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6
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Rodríguez-Serrano M, Rueda Soriano J, Buendía Fuentes F, Osa Sáez AM, Montó Guillot F, D'Ocon Navaza P, Aguero J, Oliver E, Serrano F, Martínez-Dolz L. Changes in Adrenoceptor and GRK Expression in Patients With Chronic Pulmonary Regurgitation. ACTA ACUST UNITED AC 2018; 72:569-576. [PMID: 30104167 DOI: 10.1016/j.rec.2018.05.030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 05/10/2018] [Indexed: 02/03/2023]
Abstract
INTRODUCTION AND OBJECTIVES Pulmonary regurgitation (PR) is a frequent complication after repair of congenital heart disease. Lymphocyte expression of adrenoceptors (β1 and β2) and kinases (GRK2, GRK3, and GRK5) reflects the neurohumoral changes that occur in heart failure (HF). The main objective of this study was to describe the gene expression of these molecules in circulating lymphocytes in patients with severe PR. METHODS A prospective study was conducted to analyze lymphocyte expression of these molecules in patients with severe PR and compare it with expression in healthy controls and patients with advanced HF. RESULTS We studied 35 patients with severe PR, 22 healthy controls, and 13 patients with HF. Multiple comparisons analysis showed that β2-adrenoceptor gene expression levels were higher in the control group than in patients in the PR and HF groups and that expression in the latter 2 groups was similar (748.49 [rank 1703.87] vs 402.80 [rank 1210.81] vs 287.46 [rank 685.69] P = .001). Similar findings were obtained in gene expression of GRK2 (760.89 [rank 1169.46] vs 445.17 [rank 1190.69] vs 284.09 [rank 585.27] P < .001). There were no differences in expression levels of these molecules according to clinical variables in patients with PR. CONCLUSIONS The gene expression pattern of GRK2 and β2-adrenoceptor as molecular markers of cardiac dysfunction was altered in patients with severe PR compared with controls and was similar to expression in patients with advanced HF.
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Affiliation(s)
| | - Joaquín Rueda Soriano
- Servicio de Cardiología, Hospital Universitario y Politécnico La Fe, Valencia, Spain
| | | | - Ana M Osa Sáez
- Servicio de Cardiología, Hospital Universitario y Politécnico La Fe, Valencia, Spain
| | - Fermí Montó Guillot
- Departamento de Farmacología, Facultad de Farmacia, Universitat de València, Burjassot, Valencia, Spain; Estructura de Recerca Interdisciplinar en Biotecnologia i Biomedicina (ERI BIOTECMED), Universitat de València, Burjassot, Valencia, Spain
| | - Pilar D'Ocon Navaza
- Departamento de Farmacología, Facultad de Farmacia, Universitat de València, Burjassot, Valencia, Spain; Estructura de Recerca Interdisciplinar en Biotecnologia i Biomedicina (ERI BIOTECMED), Universitat de València, Burjassot, Valencia, Spain
| | - Jaume Aguero
- Servicio de Cardiología, Hospital Universitario y Politécnico La Fe, Valencia, Spain; Área de Fisiopatología del Miocardio, Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), Madrid, Spain
| | - Eduardo Oliver
- Área de Fisiopatología del Miocardio, Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), Madrid, Spain
| | - Félix Serrano
- Servicio de Cirugía Cardiaca, Hospital Universitario y Politécnico La Fe, Valencia, Spain
| | - Luis Martínez-Dolz
- Servicio de Cardiología, Hospital Universitario y Politécnico La Fe, Valencia, Spain
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7
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Saygin D, Wanner N, Rose JA, Naga Prasad SV, Tang WHW, Erzurum S, Asosingh K. Relative quantification of beta-adrenergic receptor in peripheral blood cells using flow cytometry. Cytometry A 2018; 93:563-570. [PMID: 29573550 DOI: 10.1002/cyto.a.23358] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 02/12/2018] [Accepted: 02/19/2018] [Indexed: 11/11/2022]
Abstract
Beta-adrenergic receptors (β-ARs) play a critical role in many diseases. Quantification of β-AR density may have clinical implications in terms of assessing disease severity and identifying patients who could potentially benefit from beta-blocker therapy. Classical methods for β-AR quantification are based on labor-intensive and time-consuming radioligand binding assays. Here, we report optimization of a flow cytometry-based method utilizing a biotinylated β-AR ligand alprenolol as a probe and use of this method to quantify relative receptor expression in healthy controls (HC). Quantum™ MESF beads were used for quantification in absolute fluorescence units. The probe was chemically modified by adding a spacer moiety between biotin and alprenolol to stabilize receptor binding, thus preventing binding decay. Testing of three different standard cell fixation and permeabilization methods (formaldehyde fixation and saponin, Tween-20, or Triton-X 100 permeabilization) showed that the formaldehyde/Triton-X 100 method yielded the best results. β-AR expression was significantly higher in granulocytes compared to mononuclear cells. These data show that flow cytometric quantification of relative β-AR expression in circulating leukocytes is a suitable technology for large-scale clinical application. © 2018 International Society for Advancement of Cytometry.
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Affiliation(s)
- Didem Saygin
- Department of Pathobiology, Lerner Research Institute Cleveland Clinic, Cleveland, Ohio
| | - Nicholas Wanner
- Department of Pathobiology, Lerner Research Institute Cleveland Clinic, Cleveland, Ohio
| | - Jonathan A Rose
- Department of Internal Medicine, Beth Israel Deaconess Medical Center Harvard Medical School, Boston, Massachusetts
| | | | - W H Wilson Tang
- Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio.,Department of Cardiovascular Medicine, Cleveland Clinic, Cleveland, Ohio
| | - Serpil Erzurum
- Department of Pathobiology, Lerner Research Institute Cleveland Clinic, Cleveland, Ohio.,Respiratory Institute, Cleveland Clinic, Cleveland, Ohio
| | - Kewal Asosingh
- Department of Pathobiology, Lerner Research Institute Cleveland Clinic, Cleveland, Ohio.,Flow Cytometry Core Lerner Research Institute Cleveland Clinic, Cleveland, Ohio
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8
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Wang YY, Mesirca P, Marqués-Sulé E, Zahradnikova A, Villejoubert O, D'Ocon P, Ruiz C, Domingo D, Zorio E, Mangoni ME, Benitah JP, Gómez AM. RyR2R420Q catecholaminergic polymorphic ventricular tachycardia mutation induces bradycardia by disturbing the coupled clock pacemaker mechanism. JCI Insight 2017; 2:91872. [PMID: 28422759 DOI: 10.1172/jci.insight.91872] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Accepted: 03/09/2017] [Indexed: 01/14/2023] Open
Abstract
Catecholaminergic polymorphic ventricular tachycardia (CPVT) is a lethal genetic arrhythmia that manifests syncope or sudden death in children and young adults under stress conditions. CPVT patients often present bradycardia and sino-atrial node (SAN) dysfunction. However, the mechanism remains unclear. We analyzed SAN function in two CPVT families and in a novel knock-in (KI) mouse model carrying the RyR2R420Q mutation. Humans and KI mice presented slower resting heart rate. Accordingly, the rate of spontaneous intracellular Ca2+ ([Ca2+]i) transients was slower in KI mouse SAN preparations than in WT, without any significant alteration in the "funny" current (If ). The L-type Ca2+ current was reduced in KI SAN cells in a [Ca2+]i-dependent way, suggesting that bradycardia was due to disrupted crosstalk between the "voltage" and "Ca2+" clock, and the mechanisms of pacemaking was induced by aberrant spontaneous RyR2- dependent Ca2+ release. This finding was consistent with a higher Ca2+ leak during diastolic periods produced by long-lasting Ca2+ sparks in KI SAN cells. Our results uncover a mechanism for the CPVT-causing RyR2 N-terminal mutation R420Q, and they highlight the fact that enhancing the Ca2+ clock may slow the heart rhythm by disturbing the coupling between Ca2+ and voltage clocks.
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Affiliation(s)
- Yue Yi Wang
- UMR-S 1180, Inserm, Université Paris-Sud, Université Paris-Saclay, Châtenay-Malabry, France
| | - Pietro Mesirca
- UMR-5203, CNRS, INSERM U1191, Institut de Génomique Fonctionnelle, Département de Physiologie, Université de Montpellier, Montpellier, France
| | - Elena Marqués-Sulé
- UMR-S 1180, Inserm, Université Paris-Sud, Université Paris-Saclay, Châtenay-Malabry, France.,Physiotherapy Department
| | - Alexandra Zahradnikova
- UMR-S 1180, Inserm, Université Paris-Sud, Université Paris-Saclay, Châtenay-Malabry, France
| | - Olivier Villejoubert
- UMR-S 1180, Inserm, Université Paris-Sud, Université Paris-Saclay, Châtenay-Malabry, France
| | - Pilar D'Ocon
- ERI BIOTECMED and Department of Pharmacology School, University of Valencia, Valencia, Spain
| | | | - Diana Domingo
- Cardiology Department, Hospital Universitario y Politécnico La Fe, Valencia, Spain
| | - Esther Zorio
- Cardiology Department, Hospital Universitario y Politécnico La Fe, Valencia, Spain
| | - Matteo E Mangoni
- UMR-5203, CNRS, INSERM U1191, Institut de Génomique Fonctionnelle, Département de Physiologie, Université de Montpellier, Montpellier, France
| | - Jean-Pierre Benitah
- UMR-S 1180, Inserm, Université Paris-Sud, Université Paris-Saclay, Châtenay-Malabry, France
| | - Ana María Gómez
- UMR-S 1180, Inserm, Université Paris-Sud, Université Paris-Saclay, Châtenay-Malabry, France
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9
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Changes in the expression of α 1B -adrenoceptor in peripheral mononuclear cells correlates with blood pressure and plasmatic homocysteine. Biomed Pharmacother 2017; 88:721-727. [DOI: 10.1016/j.biopha.2017.01.061] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Revised: 01/02/2017] [Accepted: 01/10/2017] [Indexed: 11/22/2022] Open
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10
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Affiliation(s)
- Joshua G Travers
- From The Heart Institute, Division of Molecular Cardiovascular Biology, Cincinnati Children's Hospital Medical Center, OH
| | - Allison E Schafer
- From The Heart Institute, Division of Molecular Cardiovascular Biology, Cincinnati Children's Hospital Medical Center, OH
| | - Burns C Blaxall
- From The Heart Institute, Division of Molecular Cardiovascular Biology, Cincinnati Children's Hospital Medical Center, OH.
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11
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Rose JA, Wanner N, Cheong HI, Queisser K, Barrett P, Park M, Hite C, Naga Prasad SV, Erzurum S, Asosingh K. Flow Cytometric Quantification of Peripheral Blood Cell β-Adrenergic Receptor Density and Urinary Endothelial Cell-Derived Microparticles in Pulmonary Arterial Hypertension. PLoS One 2016; 11:e0156940. [PMID: 27270458 PMCID: PMC4896479 DOI: 10.1371/journal.pone.0156940] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Accepted: 05/23/2016] [Indexed: 01/08/2023] Open
Abstract
Pulmonary arterial hypertension (PAH) is a heterogeneous disease characterized by severe angiogenic remodeling of the pulmonary artery wall and right ventricular hypertrophy. Thus, there is an increasing need for novel biomarkers to dissect disease heterogeneity, and predict treatment response. Although β-adrenergic receptor (βAR) dysfunction is well documented in left heart disease while endothelial cell-derived microparticles (Ec-MPs) are established biomarkers of angiogenic remodeling, methods for easy large clinical cohort analysis of these biomarkers are currently absent. Here we describe flow cytometric methods for quantification of βAR density on circulating white blood cells (WBC) and Ec-MPs in urine samples that can be used as potential biomarkers of right heart failure in PAH. Biotinylated β-blocker alprenolol was synthesized and validated as a βAR specific probe that was combined with immunophenotyping to quantify βAR density in circulating WBC subsets. Ec-MPs obtained from urine samples were stained for annexin-V and CD144, and analyzed by a micro flow cytometer. Flow cytometric detection of alprenolol showed that βAR density was decreased in most WBC subsets in PAH samples compared to healthy controls. Ec-MPs in urine was increased in PAH compared to controls. Furthermore, there was a direct correlation between Ec-MPs and Tricuspid annular plane systolic excursion (TAPSE) in PAH patients. Therefore, flow cytometric quantification of peripheral blood cell βAR density and urinary Ec-MPs may be useful as potential biomarkers of right ventricular function in PAH.
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Affiliation(s)
- Jonathan A. Rose
- Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, Ohio, United States of America
| | - Nicholas Wanner
- Department of Pathobiology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Hoi I. Cheong
- Department of Pathobiology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Kimberly Queisser
- Department of Pathobiology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Patrick Barrett
- Flow Cytometry Core, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Margaret Park
- Department of Pathobiology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Corrine Hite
- Department of Pathobiology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Sathyamangla V. Naga Prasad
- Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Serpil Erzurum
- Department of Pathobiology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
- Respiratory Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Kewal Asosingh
- Department of Pathobiology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
- * E-mail:
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12
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Tian X, Guo R, Zhang Y, Xu L, Liu X, Hou Y. Effects of the Sympathetic Nervous System on Regulatory T Cell and T Helper 1 Chemokine Expression in Patients with Acute Coronary Syndrome. Neuroimmunomodulation 2016; 23:168-178. [PMID: 27764833 DOI: 10.1159/000448660] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Accepted: 07/20/2016] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE To observe the effects of sympathetic overactivity on the immune system involved in the imbalance of T helper (Th) lymphocytes, we investigated the correlation between autonomic dysregulation and the generation of regulatory T (Treg) and Th1 chemokines in patients with acute coronary syndrome (ACS). METHODS Blood samples obtained from patients with coronary artery disease and controls were analyzed for levels of Th1 and Treg cells and their associated cytokines by flow cytometry. In addition, the activity of the cyclic adenosine monophosphate (cAMP), the levels of norepinephrine (NE), epinephrine (EPI) and serum cytokines, and the activity of protein kinase A (PKA) were analyzed by Western blot, radioimmunoassay, high-performance liquid chromatography and enzyme-linked immunoassay, respectively. All subjects were evaluated for heart rate variability (HRV). RESULTS Levels of Th1 cells and T-bet (a T-box transcription factor), NE, EPI, cAMP and PKA significantly increased (all p < 0.01) whereas HRV and levels of Treg cells and STAT5 decreased (all p < 0.01) in ACS patients compared to patients with stable angina and controls. The disorder of Th1 and Treg cells is closely related to the activation of cAMP-PKA induced by hyperactivity of the sympathetic system. CONCLUSIONS This study showed that the abnormalities in specific subsets of CD4+ T cells are associated with sympathetic hyperactivity in ACS patients. It may provide surprising insights into the pathogenesis of arteriosclerosis, involving the regulation of the sympathetic nervous system on immune inflammation.
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Affiliation(s)
- Xiuqing Tian
- Department of Cardiology, Qianfoshan Hospital, Shandong University, Jinan, China
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13
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β2- and β1-Adrenoceptor Expression Exhibits a Common Regulatory Pattern With GRK2 and GRK5 in Human and Animal Models of Cardiovascular Diseases. J Cardiovasc Pharmacol 2015; 66:478-86. [DOI: 10.1097/fjc.0000000000000299] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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14
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Song B, Li T, Chen S, Yang D, Luo L, Wang T, Han X, Bai L, Ma A. Correlations between MTP and ROS Levels of Peripheral Blood Lymphocytes and Readmission in Patients with Chronic Heart Failure. Heart Lung Circ 2015; 25:296-302. [PMID: 26631827 DOI: 10.1016/j.hlc.2015.09.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Revised: 08/12/2015] [Accepted: 09/03/2015] [Indexed: 11/15/2022]
Abstract
BACKGROUND Peripheral blood lymphocytes exhibit changes that parallel those in failing cardiomyocytes. We hypothesised that mitochondrial transmembrane potential (MTP) and reactive oxygen species (ROS) levels of lymphocytes are associated with serum NT-proBNP and short-term prognosis in patients with chronic heart failure (CHF). METHODS Fifty-four CHF patients and 30 controls were enrolled in this prospective study. Mitochondrial transmembrane potential and ROS levels of lymphocytes were evaluated by flow cytometry and reported as the JC-1 fluorescence ratio and DCF fluorescence intensity, respectively. Serum NT-proBNP levels and biochemical parameters were also examined. All the participants received follow-up to evaluate clinical end-points after eight months. RESULTS Chronic heart failure patients had higher levels of DCF fluorescence intensity of lymphocytes and serum NT-proBNP, as well as lower levels of JC-1 fluorescence ratios compared with those of controls (all P<0.05). A closer relationship was found between Lg(DCF fluorescence intensity of lymphocytes) or JC-1 fluorescence ratio of lymphocytes and Lg(NT-proBNP) (both P<0.05) in CHF patients. During the eight-month follow-up period, 14 CHF patients (25.9%) were readmitted for severe HF, but none died. A logistic regression analysis showed that both ROS level and MTP of the lymphocytes were independent predictors (B=7.03, P=0.006; B= - 0.32, P=0.029, respectively) of readmission of CHF patients. CONCLUSIONS In CHF patients at low risk, MTP and ROS levels of the lymphocytes showed a significant change that is associated with serum NT-proBNP and patient readmission.
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Affiliation(s)
- Bingxue Song
- Department of Cardiovascular Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China; Shaanxi Key Laboratory of Molecular Cardiology (Xi'an Jiaotong University), Xi'an, Shaanxi, China; Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education, Xi'an, Shaanxi, China
| | - Tao Li
- Department of Cardiovascular Medicine, Xi'an Central Hospital, Xi'an, Shaanxi, China
| | - Shuping Chen
- Department of Cardiovascular Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China; Shaanxi Key Laboratory of Molecular Cardiology (Xi'an Jiaotong University), Xi'an, Shaanxi, China; Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education, Xi'an, Shaanxi, China
| | - Dandan Yang
- Department of Cardiovascular Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China; Shaanxi Key Laboratory of Molecular Cardiology (Xi'an Jiaotong University), Xi'an, Shaanxi, China; Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education, Xi'an, Shaanxi, China
| | - Ling Luo
- Department of Cardiovascular Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China; Shaanxi Key Laboratory of Molecular Cardiology (Xi'an Jiaotong University), Xi'an, Shaanxi, China; Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education, Xi'an, Shaanxi, China
| | - Tingzhong Wang
- Department of Cardiovascular Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China; Shaanxi Key Laboratory of Molecular Cardiology (Xi'an Jiaotong University), Xi'an, Shaanxi, China; Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education, Xi'an, Shaanxi, China
| | - Xiu Han
- Department of Cardiovascular Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China; Shaanxi Key Laboratory of Molecular Cardiology (Xi'an Jiaotong University), Xi'an, Shaanxi, China; Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education, Xi'an, Shaanxi, China
| | - Ling Bai
- Department of Cardiovascular Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China; Shaanxi Key Laboratory of Molecular Cardiology (Xi'an Jiaotong University), Xi'an, Shaanxi, China; Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education, Xi'an, Shaanxi, China.
| | - Aiqun Ma
- Department of Cardiovascular Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China; Shaanxi Key Laboratory of Molecular Cardiology (Xi'an Jiaotong University), Xi'an, Shaanxi, China; Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education, Xi'an, Shaanxi, China.
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In vivo β-adrenergic receptor responsiveness: ethnic differences in the relationship with symptoms of depression and fatigue. Int J Behav Med 2015; 21:843-50. [PMID: 24114717 DOI: 10.1007/s12529-013-9359-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
BACKGROUND Depressive symptoms and fatigue frequently overlap in clinical samples and the general population. The link of depressive symptoms and fatigue with increased risk of cardiovascular disease has been partly explained by shared biological mechanisms including sympathetic overactivity. Prolonged sympathetic overactivity downregulates the responsiveness of the β-adrenergic receptor (β-AR), a receptor that mediates several end-organ sympathetic responses. PURPOSE The authors studied whether depression and fatigue are related to reduced β-AR responsiveness within the human body (in vivo) in an ethnically diverse sample of African and Caucasian Americans. METHODS The chronotropic25 dose (CD25) was used to determine in vivo β-AR responsiveness in 93 healthy participants. Psychometric measures included the Center of Epidemiological Studies-Depression Scale and the Multidimensional Fatigue Symptom Inventory. RESULTS Hierarchical regression analyses (adjusted for age, gender, body mass index, blood pressure, smoking, and ethnicity) revealed that mental fatigue was significantly related to reduced β-AR responsiveness (i.e., higher CD25 values) in the whole sample. Moderation analyses indicated significant ethnicity × depression/fatigue interactions. Depressive symptoms, total fatigue, emotional fatigue, mental fatigue, and physical fatigue were related to reduced β-AR responsiveness in Caucasian American but not in African Americans. CONCLUSIONS Our findings suggest that symptoms of depression and fatigue are related to decreased in vivo β-AR responsiveness in Caucasian Americans. The lack of this association in African Americans highlights the importance for considering ethnicity as a potential moderator in research focusing on associations between psychological variables and cardiovascular function.
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Vicente D, Montó F, Oliver E, Buendía F, Rueda J, Agüero J, Almenar L, Barettino D, D'Ocon P. Myocardial and lymphocytic expression of eNOS and nNOS before and after heart transplantation: Relationship to clinical status. Life Sci 2013; 93:108-15. [DOI: 10.1016/j.lfs.2013.05.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2013] [Revised: 05/16/2013] [Accepted: 05/29/2013] [Indexed: 12/26/2022]
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17
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Rengo G, Galasso G, Femminella GD, Parisi V, Zincarelli C, Pagano G, De Lucia C, Cannavo A, Liccardo D, Marciano C, Vigorito C, Giallauria F, Ferrara N, Furgi G, Filardi PP, Koch WJ, Leosco D. Reduction of lymphocyte G protein-coupled receptor kinase-2 (GRK2) after exercise training predicts survival in patients with heart failure. Eur J Prev Cardiol 2013; 21:4-11. [PMID: 23689525 DOI: 10.1177/2047487313491656] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
BACKGROUND Increased cardiac G protein-coupled receptor kinase-2 (GRK2) expression has a pivotal role at inducing heart failure (HF)-related β-adrenergic receptor (βAR) dysfunction. Importantly, abnormalities of βAR signalling in the failing heart, including GRK2 overexpression, are mirrored in circulating lymphocytes and correlate with HF severity. Exercise training has been shown to exert several beneficial effects on the failing heart, including normalization of cardiac βAR function and GRK2 protein levels. In the present study, we evaluated whether lymphocyte GRK2 levels and short-term changes of this kinase after an exercise training programme can predict long-term survival in HF patients. METHODS For this purpose, we prospectively studied 193 HF patients who underwent a 3-month exercise training programme. Lymphocyte GRK2 protein levels, plasma N-terminal pro-brain natriuretic peptide, and norepinephrine were measured at baseline and after training along with clinical and functional parameters (left ventricular ejection fraction, NYHA class, and peak-VO2). Cardiac-related mortality was evaluated during a mean follow-up period of 37 ± 20 months. RESULTS Exercise was associated with a significant reduction of lymphocyte GRK2 protein levels (from 1.29 ± 0.52 to 1.16 ± 0.65 densitometric units, p < 0.0001). Importantly, exercise related changes of GRK2 (delta values) robustly predicted survival in our study population. Interestingly, HF patients who did not show reduced lymphocyte GRK2 protein levels after training presented the poorest outcome. CONCLUSIONS Our data offer the first demonstration that changes of lymphocyte GRK2 after exercise training can strongly predict outcome in advanced HF.
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Affiliation(s)
- Giuseppe Rengo
- Fondazione S. Maugeri, Istituto di Telese, Benevento, Italy
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18
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Targeting the β-Adrenergic Receptor System Through G-Protein–Coupled Receptor Kinase 2: A New Paradigm for Therapy and Prognostic Evaluation in Heart Failure. Circ Heart Fail 2012; 5:385-91. [DOI: 10.1161/circheartfailure.112.966895] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Abstract
OBJECTIVE Several stress-related states and conditions that are considered to involve sympathetic overactivation are accompanied by increased circulating levels of inflammatory immune markers. Prolonged sympathetic overactivity involves increased stimulation of the β-adrenergic receptor (β-AR). Although prior research suggests that one mechanism by which sympathetic stimulation may facilitate inflammation is via β-AR activation, little work has focused on the relationship between circulating inflammatory immune markers and β-AR function within the human body (in vivo). We examined whether decreased β-AR sensitivity, an indicator of prolonged β-adrenergic overactivation and a physiological component of chronic stress, is related to elevated levels of inflammatory immune markers. METHODS Ninety-three healthy participants aged 19 to 51 years underwent the chronotropic 25 dose isoproterenol test to determine in vivo β-AR function. Circulating levels of C-reactive protein, interleukin 6, and soluble tumor necrosis factor receptor 1 were determined. RESULTS β-AR sensitivity was lower in people with higher C-reactive protein concentrations (r = 0.326, p = .003). That relationship remained significant after controlling for sociodemographic and health variables such as age, sex, ethnicity, body mass index, mean arterial blood pressure, heart rate, leisure-time exercise, and smoking status. No significant relationship was found between chronotropic 25 dose and interleukin 6 or soluble tumor necrosis factor receptor 1. CONCLUSIONS This study demonstrates a link between in vivo β-adrenergic receptor function and selected circulating inflammatory markers (CRP) in humans. Future studies in specific disease states may be promising.
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Cuniberti B, Badino P, Odore R, Girardi C, Re G. Effects induced by exercise on lymphocyte β-adrenergic receptors and plasma catecholamine levels in performance horses. Res Vet Sci 2012; 92:116-20. [DOI: 10.1016/j.rvsc.2010.11.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2008] [Revised: 10/04/2010] [Accepted: 11/08/2010] [Indexed: 10/18/2022]
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Abstract
G protein-coupled receptors (GPCRs) represent the largest family of membrane receptors and are responsible for regulating a wide variety of physiological processes. This is accomplished via ligand binding to GPCRs, activating associated heterotrimeric G proteins and intracellular signaling pathways. G protein-coupled receptor kinases (GRKs), in concert with β-arrestins, classically desensitize receptor signal transduction, thus preventing hyperactivation of GPCR second-messenger cascades. As changes in GRK expression have featured prominently in many cardiovascular pathologies, including heart failure, myocardial infarction, hypertension, and cardiac hypertrophy, GRKs have been intensively studied as potential diagnostic or therapeutic targets. Herein, we review our evolving understanding of the role of GRKs in cardiovascular pathophysiology.
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Affiliation(s)
- Stephen L Belmonte
- Aab Cardiovascular Research Institute, University of Rochester School of Medicine and Dentistry, 601 Elmwood Avenue, Rochester, NY 14642, USA
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22
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Schmidt M, Michel MC. How can 1 + 1 = 3? β2-adrenergic and glucocorticoid receptor agonist synergism in obstructive airway diseases. Mol Pharmacol 2011; 80:955-8. [PMID: 21914841 DOI: 10.1124/mol.111.075481] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
For a long time it was believed that β(2)-adrenergic receptor agonists used in the treatment of obstructive airway diseases worked primarily on airway smooth muscle cells, causing relaxation, whereas glucocorticoids primarily improved airway function via their anti-inflammatory action, indicating that their clinical synergism occurred at the organism rather than the cellular level. However, it is now becoming clear that both drug classes can affect airway function at multiple levels, including an integrated effect on several cell types. This article summarizes data on the molecular interaction between the two receptor systems, particularly with relevance to phenomena of β(2)-adrenergic receptor desensitization and glucocorticoid insensitivity in the airways. These molecular interactions may contribute to the observed clinical synergism between both drug classes in the treatment of obstructive airway diseases.
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Affiliation(s)
- Martina Schmidt
- Department of Molecular Pharmacology, University of Groningen, Groningen, the Netherlands
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beta-Adrenoceptor and GRK3 expression in human lymphocytes is related to blood pressure and urinary albumin excretion. J Hypertens 2010; 28:1281-9. [PMID: 20216086 DOI: 10.1097/hjh.0b013e3283383564] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE The objective of our work was to analyze if changes in the expression of beta-adrenoceptors (beta-ARs) and G-protein-coupled receptor kinases (GRKs) in human lymphocytes - a practical surrogate for myocardial or vascular cells - are related to the hypertensive state and its clinical consequences. METHODS Real-time quantitative RT-PCR was employed to evaluate the expression of the three beta-ARs (beta1, beta2, beta3) and three GRKs (GRK2, GRK3, GRK5) in human lymphocytes obtained from both normotensive and hypertensive patients, some of whom had been treated with blockers of the renin-angiotensin system. Office blood pressure, 24-h ambulatory blood pressure, urinary albumin excretion and serum biochemical profile were also recorded. RESULTS AND CONCLUSIONS beta1-AR expression levels were higher in circulating lymphocytes from hypertensive patients (2-DeltaDeltaCt = 2.135 +/- 0.4252*, vs. control group), but this difference was not observed when these patients were treated with blockers of the renin-angiotensin system. beta1-AR levels directly correlated (r2 = 0.5711, P = 0.0185) with urinary albumin excretion in microalbuminuric patients, which relates alterations of this receptor to cardiovascular risk. An inverse correlation was observed between the expression levels of beta2-AR and diastolic blood pressure (r2 = 0.2078, P = 0.0031), suggesting that beta2-AR levels in lymphocytes mirror their expression in vascular cells, in which beta2-AR-mediated relaxation regulates vascular resistance. mRNA levels for GRK3 were inversely correlated with systolic and diastolic blood pressure (day, night and 24 h), which suggests a protective role for GRK3 in the regulation of human blood pressure, as supported by previous findings in transgenic mice.
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24
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Bonita RE, Raake PW, Otis NJ, Chuprun JK, Spivack T, Dasgupta A, Whellan DJ, Mather PJ, Koch WJ. Dynamic changes in lymphocyte GRK2 levels in cardiac transplant patients: a biomarker for left ventricular function. Clin Transl Sci 2010; 3:14-8. [PMID: 20443948 DOI: 10.1111/j.1752-8062.2010.00176.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
G protein-coupled receptor kinase 2 (GRK2), which is upregulated in the failing human myocardium, appears to have a role in heart failure (HF) pathogenesis. In peripheral lymphocytes, GRK2 expression has been shown to reflect myocardial levels. This study represents an attempt to define the role for GRK2 as a potential biomarker of left ventricular function in HF patients. We obtained blood from 24 HF patients before and after heart transplantation and followed them for up to 1 year, also recording hemodynamic data and histological results from endomyocardial biopsies. We determined blood GRK2 protein by Western blotting and enzyme-linked immunosorbent assay. GRK2 levels were obtained before transplant and at first posttransplant biopsy. GRK2 levels significantly declined after transplant and remained low over the course of the study period. After transplantation, we found that blood GRK2 significantly dropped and remained low consistent with improved cardiac function in the transplanted heart. Blood GRK2 has potential as a biomarker for myocardial function in end-stage HF.
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Affiliation(s)
- Raphael E Bonita
- Department of Medicine, Division of Cardiology, Thomas Jefferson University, Philadelphia, PA, USA
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25
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Campanile A, Iaccarino G. G-protein-coupled receptor kinases in cardiovascular conditions: focus on G-protein-coupled receptor kinase 2, a gain in translational medicine. Biomark Med 2009; 3:525-40. [DOI: 10.2217/bmm.09.50] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
With increasing knowledge of the regulatory mechanisms of G-protein-coupled receptor signaling in heart physiology, many studies have focused on the role of this system in cardiovascular disease. In recent years, scientists have moved their attention from the receptors to their regulatory proteins: the G-protein-coupled receptor kinases. This class of protein is indispensable for terminating signaling of G-protein-coupled receptors through receptor desensitization and downregulation. This article attempts to assemble the currently available information regarding G-protein-coupled receptor kinases and their role in cardiovascular disease and, in particular, the potential employment of G-protein-coupled receptor kinase 2 as biomarker of cardiac dysfunction.
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Affiliation(s)
- Alfonso Campanile
- Dipartimento di Medicina Clinica, Scienze Cardiovascolari ed Immunologiche, Federico II University, Via Sergio Pansini 5, Edificio 2, 80131 Napoli, Italy
| | - Guido Iaccarino
- Dipartimento di Medicina Clinica, Scienze Cardiovascolari ed Immunologiche, Federico II University, Via Sergio Pansini 5, Edificio 2, 80131 Napoli, Italy
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26
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Agüero J, Almenar L, D'Ocon P, Oliver E, Montó F, Rueda J, Vicente D, Martínez-Dolz L, Salvador A. Myocardial and peripheral lymphocytic transcriptomic dissociation of beta-adrenoceptors and G protein-coupled receptor kinases in heart transplantation. J Heart Lung Transplant 2009; 28:1166-71. [PMID: 19782607 DOI: 10.1016/j.healun.2009.06.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2009] [Revised: 06/06/2009] [Accepted: 06/06/2009] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND The genetic expression of adrenergic receptors plays an important pathophysiologic role in heart failure. G protein-coupled receptor kinases (GRKs) desensitize the beta-receptor to catecholaminergic stimulation. It has been suggested that their mRNA expression in peripheral lymphocytes could mirror the changes in their myocardial expression in the failing heart, but this relationship between the myocyte and lymphocyte has not been studied in heart transplantation (HT). The objective of this study was to analyze adrenergic receptor and GRK mRNA expression in myocardium and lymphocytes and their correlation. METHODS Twenty-three HT patients without evidence of acute rejection or echocardiographic dysfunction were assessed. Myocardial biopsy samples and peripheral blood lymphocytes were obtained, and alpha(1)- and beta-adrenoceptor subtype and GRK subtype mRNA was analyzed using reverse transcript-polymerase chain reaction (RT-PCR). RESULTS Mean age was 45 +/- 15 years, with a median of time since HT of 205 (351) days. In biopsies, the beta(1)/beta(2)-adrenoceptor ratio was 57%/42%, and GRK5 was the most commonly expressed, followed by GRK2. In lymphocytes, the beta(1)/beta(2) ratio was 3%/96%, whereas GRK2 mRNA expression was greater than that of other subtypes. There was no correlation between myocardial and lymphocyte parameters. There were no correlations with clinical variables, but lymphocyte beta(2) and GRK2 were increased with time since HT. CONCLUSIONS In the transplanted heart, there is no correlation between mRNA expression of adrenoceptors and GRKs in myocardium and peripheral lymphocytes. With time since transplant, mRNA expression of lymphocyte but not myocardial beta(2)-adrenoceptor and GRK2 increases. Therefore, this dissociation between myocardial and lymphocyte mRNA expression limits the potential use of peripheral blood samples for diagnosis of graft dysfunction.
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Affiliation(s)
- Jaime Agüero
- Heart Failure and Transplant Unit, Department of Cardiology, La Fe University Hospital, Plaza Mestre Vicente Ballester 2-13, Valencia, Spain.
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27
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SCOTT JESSICAM, WARBURTON DARRENE. Mechanisms Underpinning Exercise-Induced Changes in Left Ventricular Function. Med Sci Sports Exerc 2008; 40:1400-7. [PMID: 18614953 DOI: 10.1249/mss.0b013e318172cf10] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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28
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Yu XY, Lin SG, Wang XM, Liu Y, Zhang B, Lin QX, Yang M, Zhou SF. Evidence for coexistence of three beta-adrenoceptor subtypes in human peripheral lymphocytes. Clin Pharmacol Ther 2007; 81:654-8. [PMID: 17361123 DOI: 10.1038/sj.clpt.6100154] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Peripheral circulating lymphocytes are easily accessible cells for investigating changes in beta-adrenergic receptors (ADRBs) in humans, but previous reports indicate that these cells only express ADRB2. This study aimed to investigate whether ADRB1 and ADRB3 were expressed in peripheral lymphocytes and the changes of ADRBs in congestive heart failure. Our study demonstrates that ADRB1, ADRB2, and ADRB3 coexist in human peripheral lymphocytes, with differential binding property and expression level. Patients with congestive heart failure had significantly decreased total ADRB density and mRNA levels of ADRB1 and ADRB2 genes, but not ADRB3, compared with healthy subjects. The levels of mRNA of ADRB1 and ADRB2 in peripheral lymphocytes from patients with congestive heart disease were significantly increased after drug treatment. Our study, for the first time, indicates that human peripheral lymphocytes coexpress ADRB1, ADRB2, and ADRB3, which has important implications for precisely predicting clinical response to drug therapy in congestive heart failure.
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MESH Headings
- Adrenergic beta-Agonists/metabolism
- Adrenergic beta-Agonists/pharmacology
- Adrenergic beta-Antagonists/metabolism
- Adrenergic beta-Antagonists/pharmacology
- Adult
- Binding, Competitive/drug effects
- Blotting, Western
- Female
- Humans
- In Vitro Techniques
- Lymphocytes/metabolism
- Male
- Propanolamines/metabolism
- RNA, Messenger/biosynthesis
- RNA, Messenger/genetics
- Radioligand Assay
- Receptors, Adrenergic, beta-1/drug effects
- Receptors, Adrenergic, beta-1/metabolism
- Receptors, Adrenergic, beta-2/drug effects
- Receptors, Adrenergic, beta-2/metabolism
- Receptors, Adrenergic, beta-3/drug effects
- Receptors, Adrenergic, beta-3/metabolism
- Reverse Transcriptase Polymerase Chain Reaction
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Affiliation(s)
- Xi-Yong Yu
- Department of Clinical Pharmacology, Guangdong Provincial People's Hospital, Guangdong Provincial Cardiovascular Institute, Guangzhou, China, and School of Life Sciences, Queensland University of Technology, Brisbane, Australia.
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29
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Hata JA, Williams ML, Schroder JN, Lima B, Keys JR, Blaxall BC, Petrofski JA, Jakoi A, Milano CA, Koch WJ. Lymphocyte levels of GRK2 (betaARK1) mirror changes in the LVAD-supported failing human heart: lower GRK2 associated with improved beta-adrenergic signaling after mechanical unloading. J Card Fail 2006; 12:360-8. [PMID: 16762799 DOI: 10.1016/j.cardfail.2006.02.011] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2005] [Revised: 02/23/2006] [Accepted: 02/24/2006] [Indexed: 01/08/2023]
Abstract
BACKGROUND In human heart failure, increased expression of G protein-coupled receptor kinases (GRKs) causes the loss of beta-adrenergic receptor (betaAR) signaling and function. Mechanical unloading with a left ventricular assist device (LVAD) promotes reverse remodeling, which includes restoration of betaAR responsiveness. We tested the hypothesis that LVAD support of the failing human heart alters the expression and activity of GRKs and we sought to determine whether changes in myocardial GRKs could be tracked in lymphocytes. METHODS AND RESULTS Paired samples of human LV tissue (n = 12) and blood were obtained at the time of LVAD implantation (heart failure) and subsequent cardiac transplantation (LVAD). betaAR signaling was quantified by receptor density and adenylyl cyclase activity. Immunoblotting and real-time reverse transcription polymerase chain reaction were used to measure GRK2 and GRK5 protein and mRNA levels. Rhodopsin phosphorylation was used to assess total GRK activity. Consistent with reverse remodeling, betaAR density and signaling were restored to nonfailing levels after LVAD support. GRK2 protein levels were significantly reduced 55% after LVAD support and GRK2 mRNA was similarly reduced. In contrast, GRK5 protein and mRNA levels were unchanged. Total myocardial GRK activity was reduced similar to the drop in GRK2 expression. In lymphocytes, GRK2 protein levels were decreased after LVAD support and there was a significant positive correlation between myocardial and lymphocyte GRK2 levels in both heart failure and LVAD samples. CONCLUSION The changes in myocardial GRK2 expression and activity that are mirrored in lymphocytes provide a possible mechanism for the restoration of betaAR signaling and reverse remodeling after mechanical unloading in the failing heart. Moreover, lymphocytes may provide a surrogate marker of myocardial GRK2 in these patients.
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Affiliation(s)
- Jonathan A Hata
- Department of Surgery, Duke University Medical Center, Durham, North Carolina, USA
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30
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Janský L, Matoušková E, Stránská E. Thermogenic action of catecholamines in human peripheral blood mononuclear cells. J Therm Biol 2006. [DOI: 10.1016/j.jtherbio.2005.11.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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31
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Iaccarino G, Barbato E, Cipolletta E, De Amicis V, Margulies KB, Leosco D, Trimarco B, Koch WJ. Elevated myocardial and lymphocyte GRK2 expression and activity in human heart failure. Eur Heart J 2005; 26:1752-8. [PMID: 16055494 DOI: 10.1093/eurheartj/ehi429] [Citation(s) in RCA: 150] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
AIMS The G protein-coupled receptor kinase-2 (GRK2 or beta-ARK1) regulates beta-adrenergic receptors (beta-ARs) in the heart, and its cardiac expression is elevated in human heart failure (HF). We sought to determine whether myocardial levels and activity of GRK2 could be monitored using white blood cells, which have been used to study cardiac beta-ARs. Moreover, we were interested in determining whether GRK2 levels in myocardium and lymphocytes may be associated with beta-AR dysfunction and HF severity. METHODS AND RESULTS In myocardial biopsies from explanted failing human hearts, GRK activity was inversely correlated with beta-AR-mediated cAMP production (R(2)=-0.215, P<0.05, n=24). Multiple regression analysis confirmed that GRK activity participates with beta-AR density to regulate catecholamine-sensitive cAMP responses. Importantly, there was a direct correlation between myocardial and lymphocytes GRK2 activity (R(2)=0.5686, P<0.05, n=10). Lymphocyte GRK activity was assessed in HF patients with various ejection fractions (EFs) (n=33), and kinase activity was significantly higher in patients with lower EFs and was higher with increasing NYHA class (P<0.001). CONCLUSION Myocardial GRK2 expression and activity are mirrored by lymphocyte levels of this kinase, and its elevation in HF is associated with the loss of beta-AR responsiveness and appears to increase with disease severity. Therefore, lymphocytes may provide a surrogate for monitoring cardiac GRK2 in human HF.
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Affiliation(s)
- Guido Iaccarino
- Department of Medicina Clinica Scienze Cardiovascolari ed Immunologiche, Federico II University, Via Pansini 5, 80131 Naples, Italy
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Waters WW, Platts SH, Mitchell BM, Whitson PA, Meck JV. Plasma volume restoration with salt tablets and water after bed rest prevents orthostatic hypotension and changes in supine hemodynamic and endocrine variables. Am J Physiol Heart Circ Physiol 2004; 288:H839-47. [PMID: 15486040 DOI: 10.1152/ajpheart.00220.2004] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Head-down bed rest changes the values of many cardiovascular and endocrine variables and also elicits significant hypovolemia. Because previous studies had not controlled for hypovolemia, it is unknown whether the reported changes were primary effects of bed rest or secondary effects of bed rest-induced hypovolemia. We hypothesized that restoring plasma volume with salt tablets and water after 12 days of head-down bed rest would result in an absence of hemodynamic and endocrine changes and a reduced incidence of orthostatic hypotension. In 10 men, we measured changes from pre-bed-rest to post-bed-rest in venous and arterial pressures; heart rate; stroke volume; cardiac output; vascular resistance; plasma norepinephrine, epinephrine, vasopressin, renin activity (PRA), and aldosterone responses to different tilt levels (0 degrees, -10 degrees, 20 degrees, 30 degrees, and 70 degrees); and plasma volume and platelet alpha2- and lymphocyte beta2-adrenoreceptor densities and affinities (0 degrees tilt only). Fluid loading at the end of bed rest restored plasma volume and resulted in the absence of post-bed-rest orthostatic hypotension and changes in supine hemodynamic and endocrine variables. Fluid loading did not prevent post-bed-rest increases in beta2-adrenoreceptor density or decreases in the aldosterone-to-PRA ratio (P = 0.05 for each). Heart rate, epinephrine, and PRA responses to upright tilt after bed rest were increased (P < 0.05), despite the fluid load. These results suggest that incidents of orthostatic hypotension and many of the changes in supine hemodynamic and endocrine variables in volume-depleted bed-rested subjects occur secondarily to the hypovolemia. Despite normovolemia after bed rest, beta2-adrenoreceptors were upregulated, and heart rate, epinephrine, and PRA responses to tilt were augmented, indicating that these changes are independent of volume depletion.
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Affiliation(s)
- Wendy W Waters
- Human Adaptation and Countermeasures Office, Wyle Laboratories, Inc., Houston, Texas, USA
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Yingxin P, Jiang S, Xiaoyong Q, Hao X, Chunli R, Dongmei Y, Zhiqin G, Shiling Z, Min W. Regulation of the catecholamine beta-adrenergic system in ventricular remodeling of hypertension. ACTA ACUST UNITED AC 2004; 45:285-96. [PMID: 15090705 DOI: 10.1536/jhj.45.285] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Differences in structural remodeling are believed to be influenced by hormonal systems in hypertension. The objective of the present study was to investigate the change in the circulating catecholamine beta-adrenergic system in the left ventricle remodeling process in hypertensives. One hundred and thirty-four men (mean age, 53 years) had essential hypertension and underwent echocardiography before treatment. Normal morphology (n = 26) and concentric remodeling (n = 41) were defined by a relative wall thickness at diastole (RWT) of < 0.44 and > or = 0.44, respectively, and concentric hypertrophy (n = 28) and eccentric hypertrophy (n = 39) by a left ventricular mass index (LVMI) of < 150 g/m(2) and > or = 150 g/m(2), respectively. Forty healthy males were studied as normal controls. Plasma levels of norepinephrine (NE) and epinephrine (E) were measured by high performance liquid chromatography. The density of lymphocyte beta-adrenoceptors (beta-AR) and the content of intralymphocyte cyclic AMP (cAMP) in peripheral blood were measured using (3)H-dihydroalpneol as a ligand and protein binding assay, respectively. The plasma levels of NE and E in the 4 groups of patients with essential hypertension were significantly increased compared with the control group. The density of lymphocyte beta-AR and the content of intralymphocyte cAMP of peripheral blood in the normal morphology, concentric remodeling, and concentric hypertrophy groups were significantly higher than those in the control group, while the values in the eccentric hypertrophy group were significantly lower than those in the control group. Among the 4 groups, the plasma levels of NE and E had increased the most in the normal morphology group, followed in decreasing order by the concentric remodeling, concentric hypertrophy, and eccentric hypertrophy groups; the density of lymphocyte beta-AR and the content of intralymphocyte cAMP of peripheral blood in the normal morphology, concentric remodeling, and concentric hypertrophy groups increased while they decreased in the eccentric hypertrophy group in patients with essential hypertension. The catecholamine beta-adrenergic system appears to be related to left ventricular remodeling of hypertension. In this process, catecholamines increased continually. The density of beta-AR and the content of cAMP in peripheral lymphocytes increased at first and then decreased.
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Affiliation(s)
- Peng Yingxin
- Department of Cardiology, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
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Meck JV, Waters WW, Ziegler MG, deBlock HF, Mills PJ, Robertson D, Huang PL. Mechanisms of postspaceflight orthostatic hypotension: low alpha1-adrenergic receptor responses before flight and central autonomic dysregulation postflight. Am J Physiol Heart Circ Physiol 2003; 286:H1486-95. [PMID: 14670816 DOI: 10.1152/ajpheart.00740.2003] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Although all astronauts experience symptoms of orthostatic intolerance after short-duration spaceflight, only approximately 20% actually experience presyncope during upright posture on landing day. The presyncopal group is characterized by low vascular resistance before and after flight and low norepinephrine release during orthostatic stress on landing day. Our purpose was to determine the mechanisms of the differences between presyncopal and nonpresyncopal groups. We studied 23 astronauts 10 days before launch, on landing day, and 3 days after landing. We measured pressor responses to phenylephrine injections; norepinephrine release with tyramine injections; plasma volumes; resting plasma levels of chromogranin A (a marker of sympathetic nerve terminal release), endothelin, dihydroxyphenylglycol (DHPG, an intracellular metabolite of norepinephrine); and lymphocyte beta(2)-adrenergic receptors. We then measured hemodynamic and neurohumoral responses to upright tilt. Astronauts were separated into two groups according to their ability to complete 10 min of upright tilt on landing day. Compared with astronauts who were not presyncopal on landing day, presyncopal astronauts had 1). significantly smaller pressor responses to phenylephrine both before and after flight; 2). significantly smaller baseline norepinephrine, but significantly greater DHPG levels, on landing day; 3). significantly greater norepinephrine release with tyramine on landing day; and 4). significantly smaller norepinephrine release, but significantly greater epinephrine and arginine vasopressin release, with upright tilt on landing day. These data suggest that the etiology of orthostatic hypotension and presyncope after spaceflight includes low alpha(1)-adrenergic receptor responsiveness before flight and a remodeling of the central nervous system during spaceflight such that sympathetic responses to baroreceptor input become impaired.
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Affiliation(s)
- Janice V Meck
- Human Adaptation and Countermeasures Office, Space and Life Sciences Directorate, National Aeronautics and Space Administrattion Johnson Space Center, Houston, TX 77058, USA.
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Girdler SS, Sherwood A, Hinderliter AL, Leserman J, Costello NL, Straneva PA, Pedersen CA, Light KC. Biological correlates of abuse in women with premenstrual dysphoric disorder and healthy controls. Psychosom Med 2003; 65:849-56. [PMID: 14508031 DOI: 10.1097/01.psy.0000088593.38201.cd] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To examine the biological correlates associated with histories of sexual or physical abuse in women meeting DSM criteria for premenstrual dysphoric disorder (PMDD) and in healthy, non-PMDD controls. METHODS Twenty-eight women with prospectively confirmed PMDD were compared with 28 non-PMDD women for cardiovascular and neuroendocrine measures at rest and in response to mental stressors, and for beta-adrenergic receptor responsivity, during both the follicular and luteal phase of the menstrual cycle. Structured interview was used to assess psychiatric history and prior sexual and physical abuse experiences. All subjects were free of current psychiatric comorbidity and medication use. RESULTS More PMDD women had prior sexual and physical abuse experiences than controls (20 vs. 10, respectively). Relative to nonabused PMDD women, PMDD women with prior abuse (sexual or physical) exhibited significantly lower resting norepinephrine (NE) levels and significantly greater beta1- and beta2-adrenoceptor responsivity and greater luteal phase NE reactivity to mental stress. For non-PMDD control women, abuse was associated with blunted cortisol, cardiac output, and heart rate reactivity to mental stress relative to nonabused controls. CONCLUSIONS The results of this initial study suggest that a history of prior abuse is associated with alterations in physiological reactivity to subsequent mental stress in women, but that the biological correlates of abuse may be different for PMDD vs. non-PMDD women.
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Affiliation(s)
- Susan S Girdler
- Department of Psychiatry, University of North Carolina at Chapel Hill, North Carolina 27599-7175, USA.
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Schmidt-Rhode P, Brunke B, Schröer H, Obert K, Schlegel K, Sturm G, Schulz KD, von Wichert P. Behaviour of beta 2-adrenoceptors on lymphocytes under continuous and pulsatile tocolysis with Fenoterol. J Perinat Med 2003; 31:47-51. [PMID: 12661144 DOI: 10.1515/jpm.2003.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The present study investigates the population of beta 2-receptors on lymphocytes in pregnant women with premature labor between the 29th and 34th week of pregnancy. The population of receptors on lymphocytes correlates with that on the myometrium, which is not accessible for study during pregnancy. Fourteen patients received a pulsatile tocolysis, while ten women received a continuous tocolysis with Fenoterol. Assuming an equal population of receptors in both groups before commencement of therapy, the numbers of receptors in the patients with continuous tocolysis fell to about 35% of the initial value after 72 hours. Under pulsatile tocolysis, the numbers of receptors remained unchanged for a period of three days and was still only just below 70% of the initial value by the seventh day. Our data demonstrate that continuous administration of the short-acting beta 2-agonist Fenoterol resulted in a substantial loss of beta 2-adrenoceptors on lymphocytes. In contrast, intermittent administration of the same beta 2-adrenergic agonist prevented the onset of receptor down-regulation in pregnant women with preterm labor. Further studies are required to investigate the impact of the decreased loss of beta 2-adrenoceptor density on the good clinical experience with intermittent tocolysis.
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Fukushima N, Sakagoshi N, Ohtake S, Sawa Y, Kawata H, Shirakura R, Nakata S, Shimazu T, Yoshioka T, Matsuda H. Effects of exogenous adrenaline on the number of the beta-adrenergic receptors after brain death in humans. Transplant Proc 2002; 34:2571-4. [PMID: 12431528 DOI: 10.1016/s0041-1345(02)03429-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- N Fukushima
- Department of Surgery, Osaka University Graduate School of Medicine, Suita, Japan
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von Känel R, Mills PJ, Ziegler MG, Dimsdale JE. Effect of beta2-adrenergic receptor functioning and increased norepinephrine on the hypercoagulable state with mental stress. Am Heart J 2002; 144:68-72. [PMID: 12094190 DOI: 10.1067/mhj.2002.123146] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
BACKGROUND Procoagulant stress responses may contribute to atherosclerosis development and acute coronary thrombosis. In the present study, we examined the role of beta2-adrenergic receptor function and plasma catecholamines in the stress-induced increase in the 2 hypercoagulability markers thrombin-antithrombin III (TAT) complex and fibrin D-dimer (DD). METHODS Lymphocyte beta2-adrenoreceptor sensitivity and density were assessed at rest, and plasma levels of TAT, DD, epinephrine, and norepinephrine were measured at rest and in response to a standardized mental stress task in 19 normotensive and mildly hypertensive nonmedicated subjects (mean age 38 years, age range 29 to 48 years). RESULTS The stressor elicited a significant increase in TAT (P =.024), DD (P =.026), and norepinephrine (P =.005). Resting beta2-adrenoreceptor sensitivity (isoproterenol-stimulated cyclic adenosine monophosphate production) plus the norepinephrine change scores (stress minus rest) accounted for 59% of the variance in the absolute TAT increase in response to stress (P =.001). Hypertension status and demographic variables such as sex did not influence the results. CONCLUSIONS Acute mental stress may trigger a hypercoagulable state evidenced by increased thrombin activity and increased fibrin turnover. Beta2-adrenergic receptor sensitivity and plasma catecholamine activity may mediate the procoagulant response to acute stressors. These mechanisms may help explain the adverse impact of mental stress on the cardiovascular system.
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Affiliation(s)
- Roland von Känel
- Department of Psychiatry, University of California, San Diego, Calif 92093-0804, USA
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Lu S, Hoey A. Changes in function of cardiac receptors mediating the effects of the autonomic nervous system in the muscular dystrophy (MDX) mouse. J Mol Cell Cardiol 2000; 32:143-52. [PMID: 10652198 DOI: 10.1006/jmcc.1999.1063] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Adrenergic and muscarinic receptor mediated effects on the force of contraction and heart rate were studied in the isolated left atria and right atria from dystrophin-deficient mdx mice and age matched C57BL/10ScSn (C57) mice, respectively. The pD(2) and pA(2) values of (-)-isoprenaline and CGP 20712A, respectively, were not different in left atria and right atria from mdx and C57 mice. (-)-Phenylephrine produced a small positive inotropic effect on mdx left atria that could be antagonized by prazosin, whereas in C57 left atria no positive inotropic response was seen. In contrast, the positive chronotropic effect of (-)-phenylephrine was reduced in right atria from mdx compared to C57 right atria (P<0.05). The potency and efficacy to carbachol in the presence of (-)-isoprenaline were higher in right atria from mdx compared to C57 mice (P<0.05), although in left atria only a greater efficacy was evident in mdx mice. In left atria, basal force of contraction and maximum Ca(2+)-induced increases in force of contraction were lower from mdx compared to C57 mice (P<0. 001 and P<0.05, respectively). In conclusion, marked changes were demonstrated in the function of alpha1-adrenoceptors and muscarinic receptors, but not in beta1-adrenoceptors in left and right atria from mdx mice.
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MESH Headings
- Animals
- Autonomic Nervous System/metabolism
- Male
- Mice
- Mice, Inbred C57BL
- Mice, Inbred mdx
- Muscular Dystrophies/metabolism
- Receptors, Adrenergic, alpha/metabolism
- Receptors, Adrenergic, alpha/physiology
- Receptors, Adrenergic, beta/metabolism
- Receptors, Adrenergic, beta/physiology
- Receptors, Muscarinic/metabolism
- Receptors, Muscarinic/physiology
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Affiliation(s)
- S Lu
- Department of Biological and Physical Sciences, University of Southern Queensland, Toowoomba, QLD 4350, Australia
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Yu BH, Mills PJ, Ziegler MG, Dimsdale JE. Sympathetic and respiratory responses to hypoxia in essential hypertension. Clin Exp Hypertens 1999; 21:249-62. [PMID: 10225480 DOI: 10.3109/10641969909068665] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
An increased sympathetic nervous response to hypoxia and reduced beta-adrenergic receptor function have been reported in hypertension. This study examines the relationship between hypoxia and beta-adrenergic receptor function in sixteen normotensive and eight hypertensive subjects. We measured the average arterial oxygen saturation and the end tidal carbon dioxide partial pressure in hypertensive and normotensive groups under normoxia and mild isocapnic hypoxia (15% O2, 85% N2). The ratio of isoproterenol-stimulated cAMP to basal cAMP on lymphocytes was measured in the two groups under normoxia. We also measured plasma norepinephrine levels and calculated the "Chronotropic 25 Dose" of isoproterenol in the two groups under normoxia and hypoxia. Hypertensives had higher plasma norepinephrine levels for either breathing condition (F=7.16, p=0.015). Under hypoxia, hypertensives showed a significant decrease in the average arterial oxygen saturation (F=4.92, p=0.038) and higher "Chronotropic 25 Dose" implying decreased beta-adrenergic receptor sensitivity (F=6.30, p=0.011). These results suggest that hypertensives have a diminished ventilatory response and impaired beta-adrenergic response under hypoxia.
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Affiliation(s)
- B H Yu
- Department of Psychiatry, Samsung Medical Center, Sung Kyun Kwan University, College of Medicine, Seoul, Korea
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Lye SJ, Bernstein P, Oskamp M. Is the attenuation of beta-adrenergic agonist efficacy during labor caused by elevated prostaglandin E levels? Am J Obstet Gynecol 1998; 179:1168-74. [PMID: 9822495 DOI: 10.1016/s0002-9378(98)70126-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
OBJECTIVE Our purpose was to investigate whether attenuation of beta-adrenergic agonist efficacy during labor is due to elevated prostaglandin E levels. STUDY DESIGN beta-Receptor function (response to beta-agonist or forskolin) was tested in mononuclear leukocytes collected from women at term before or during labor. beta-Receptor function was also tested in mononuclear leukocytes of nonlaboring patients after in vitro incubation with oxytocin (1 micromol/L), prostaglandin E2 (10 micromol/L), prostaglandin F2alpha (10 micromol/L), or buffer alone. RESULTS Mononuclear leukocytes from women in active labor exhibited a significant attenuation of beta-adrenergic receptor function as a result of reduced adenylyl cyclase activity. This effect could be induced in mononuclear leukocytes from nonlaboring women by preincubation with prostaglandin E but not oxytocin or prostaglandin F. CONCLUSIONS Prostaglandin E induces heterologous desensitization of the beta-adrenergic receptor system in mononuclear leukocytes, comparable to that seen during labor. We speculate that during labor the elevated levels of prostaglandin E may induce similar effects on the myometrium, thereby decreasing the efficacy of beta-agonists as tocolytics.
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Affiliation(s)
- S J Lye
- Program in Development and Fetal Health, Samuel Lunenfeld Research Institute, Department of Obstetrics and Gynaecology, Mount Sinai Hospital, University of Toronto, Toronto, Ontario, Canada
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Mäki T, Toivonen L, Koskinen P, Näveri H, Härkönen M, Leinonen H. Effect of ethanol drinking, hangover, and exercise on adrenergic activity and heart rate variability in patients with a history of alcohol-induced atrial fibrillation. Am J Cardiol 1998; 82:317-22. [PMID: 9708660 DOI: 10.1016/s0002-9149(98)00299-9] [Citation(s) in RCA: 71] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
To elucidate the mechanism of alcohol-induced atrial fibrillation (AF) we studied the heart rate variability and parameters of the adrenergic system during alcohol intake, hangover, and exercise in 6 men (mean age 43 years) prone to alcohol-induced AF, together with 6 age-matched controls. The ambulatory (15 hour) electrocardiogram was recorded and blood samples were taken for lymphocytic beta adrenoceptor, plasma catecholamine, and cyclic adenosine monophosphate (cAMP) measurements before and after alcohol intake (blood alcohol 1.5 per thousand), during hangover, and after a standardized bicycle exercise test. The beta-adrenoceptor density in lymphocytes was unchanged in the control group after alcohol intake or during hangover. Each of the AF patients had an increase in beta-adrenoceptor density after ethanol drinking (mean increase 29%, p <0.05). The hangover or exercise beta-receptor values did not differ from those in corresponding controls. Plasma adrenaline concentration tended to decrease and noradrenaline to increase after drinking and during hangover in both groups. Plasma cAMP levels were lower in patients after drinking than in controls (p <0.05). The exercise values of the adrenergic parameters were very similar in AF patients whether or not preceded by alcohol. Analysis of ambulatory electrocardiography showed a very low rate of ectopic beats in both AF patients and controls. Analysis of heart rate variability revealed a tendency toward an increase in sympathetic/parasympathetic component ratio (low-frequency/high-frequency ratio) in AF patients, but not in controls, after ethanol drinking. In conclusion, no signs of arrhythmogenic cardiac disease were detected in patients with AF to explain the tendency toward AF. Increases in beta-adrenoceptor density and low-frequency/high-frequency ratio during ethanol intoxication in patients with AF suggest an exaggerated sympathetic reaction.
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Affiliation(s)
- T Mäki
- Department of Clinical Chemistry, Helsinki University Central Hospital, Finland
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Fujii N, Homma S, Yamazaki F, Sone R, Shibata T, Ikegami H, Murakami K, Miyazaki H. Beta-adrenergic receptor number in human lymphocytes is inversely correlated with aerobic capacity. THE AMERICAN JOURNAL OF PHYSIOLOGY 1998; 274:E1106-12. [PMID: 9611163 DOI: 10.1152/ajpendo.1998.274.6.e1106] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
In the present study, the relationships between beta-adrenergic receptor (beta-AR) expression and aerobic capacity evaluated by maximal oxygen consumption (.VO2max) and oxygen consumption level at ventilatory threshold (.VO2@VT) were investigated. Seventeen physically untrained and 25 trained men participated in the study. After supine resting, the peripheral blood was sampled for preparation of lymphocytes, the model cell used to analyze the beta-AR state. The total number of beta-AR in lymphocytes (beta-ARtotal) was inversely correlated with the VO2 max (r = -0. 368; P < 0.05) and the VO2@VT (r = -0.359; P < 0.05). Similar relationships were also observed between the number of beta-AR in cell surface and both VO2 max (r = -0.491; P < 0.05) and VO2@VT (r = -0.498; P < 0.05). However, no correlation was obtained between the number of beta-AR in intracellular compartments and either VO2 max or VO2@VT. The beta2-AR mRNA level quantified by the use of competitive reverse transcription-polymerase chain reaction was inversely correlated with VO2@VT (r = -0.567; P < 0.05) and positively correlated with beta-ARtotal (r = 0.521; P < 0.05). These findings suggest that the beta-AR number in lymphocytes is inversely correlated with aerobic capacity. This relationship may be explained by downregulation of beta-AR, including internalization with subsequent degradation of the receptors and inhibition of the beta-AR biosynthesis.
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Affiliation(s)
- N Fujii
- Gene Experiment Center, Institute of Applied Biochemistry, University of Tsukuba, Tsukuba-City 305, Japan
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Martínez PE, Lopes MTP, Martins MS, Marques AP, Salas CE. Changes in Glucocorticoid Receptor Levels of Bovine Lymphocyte and Neutrophil during Estrous Cycle. Reprod Domest Anim 1998. [DOI: 10.1111/j.1439-0531.1998.tb01316.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Jiang H, Dai G, Feng Z. [Regulation of myocardium beta-adrenoceptors pathway in ventricular remodeling of heart failure patients]. Curr Med Sci 1998; 18:83-6. [PMID: 10806830 DOI: 10.1007/bf02888472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/1997] [Indexed: 10/19/2022]
Abstract
To study the role of myocardium beta-adrenoceptors pathway in ventricular remodeling of heart failure patients. beta-adrenegic receptor density (Bmax) and the content of cAMP were measured in the papillae of left ventricle and blood lymphocyte of 20 patients suffered from heart failure (CHF) (NYHZ classification II to III) Bmax were investigated using 3H-dihydroalpheolol as ligand. cAMP were assessed by competitive immunoassay. Left ventricle mass index (LVMI) were measured using echocardiogram. The results showed that the Bmax and cAMP in failing myocardium significantly negatively correlated with LVMI (r = -0.77, P < 0.01 and r = -0.46 P < 0.05 respectively); the Bmax of myocardium and blood lymphocyte in CHF patients with NYHA III (63 +/- 12 fmol/mgpro and 514 +/- 115 fmol/10(7) cell) significantly lowered than that of NYHA II patients (94 +/- 20 fmol/mgpro and 702 +/- 138 fmol/10(7) cell); and the Bmax of myocardium and blood lymphocyte in patients with abnormal LVMI (62 +/- 12 fmol/mgpro and 516 +/- 122 fmol/10(7) cell) decreased more significantly than that with normal LVMI patients; even in nromal LVMI patients (92 +/- 21 fmol/mgpro and 682 +/- 146 fmol/10(7) cell), the Bmax of blood lymphocyte was already decreased (P < 0.01), when comparing with controls. The intralymphocyte cAMP content sygnificantly decreased than that of controls (P < 0.05). These results indicated that Bmax could reflect the severity of ventricle remodeling and the impairment of myocardium. The regulation of myocardium intracellular messenger transduction was earlier than the pathologic structural change of LV remodeling.
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Affiliation(s)
- H Jiang
- Abteilung für Kadiologie, Xiene Klinik, Tongji Medizinische Universität, Wuhan
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Akiyoshi J, Isogawa K, Tsutsumi T, Kasturagi S, Kohno K, Furuta M, Yamamoto Y, Yamada K, Fujii I. Cholecystokinin tetrapeptide-induced calcium mobilization in T cells of patients with panic disorder, major depression, or schizophrenia. Biol Psychiatry 1997; 42:151-4. [PMID: 9209734 DOI: 10.1016/s0006-3223(97)00249-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- J Akiyoshi
- Department of Neuropsychiatry, Oita Medical University, Japan
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Fujii N, Shibata T, Homma S, Ikegami H, Murakami K, Miyazaki H. Exercise-induced changes in beta-adrenergic-receptor mRNA level measured by competitive RT-PCR. J Appl Physiol (1985) 1997; 82:1926-31. [PMID: 9173960 DOI: 10.1152/jappl.1997.82.6.1926] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Competitive reverse transcription-polymerase chain reaction (RT-PCR) analysis was used to clarify whether dynamic exercise-induced increases in beta-adrenergic-receptor (beta-AR) number in human lymphocytes are accompanied by increases in the beta-AR mRNA level. Sixteen healthy subjects performed cycle ergometry until exhaustion. Before and immediately after exercise, peripheral blood was drawn from a forearm vein for preparation of lymphocytes. Both the beta-AR mRNA level and the beta-AR number were significantly increased by exercise. The changes in beta-AR mRNA level and beta-AR number were significantly correlated (r = 0.63, P < 0.01). This finding suggests that a rapid increase in beta-AR mRNA level might be an early adaptive response of the sympathetic nervous system to dynamic exercise. In vitro incubation of lymphocytes with epinephrine had no effect on beta-AR mRNA levels, nor did adenosine 3',5'-cyclic monophosphate, protein kinase C, or intracellular Ca2+ increase the beta-AR mRNA level in vitro. Therefore, it appears that other mechanisms underlie the exercise-induced elevation of beta-AR mRNA levels in human lymphocytes.
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Affiliation(s)
- N Fujii
- Gene Experiment Center, University of Tsukuba, Japan
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Mills PJ, Ziegler MG, Patterson T, Dimsdale JE, Hauger R, Irwin M, Grant I. Plasma catecholamine and lymphocyte beta 2-adrenergic receptor alterations in elderly Alzheimer caregivers under stress. Psychosom Med 1997; 59:251-6. [PMID: 9178336 DOI: 10.1097/00006842-199705000-00008] [Citation(s) in RCA: 68] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
OBJECTIVE The purpose of this study was to determine the effects of chronic stress on beta-adrenergic physiology in elderly spousal caregivers to Alzheimer patients. METHODS Thirty-seven elderly spousal caregivers and matched noncaregiver controls (mean age 73 years, SD = 6) were studied. Life stress categorization (presence of marked threat) covering the previous 6 months was determined using a semistructured interview based on the Psychiatric Epidemiological Research Inventory and the Life Events and Difficulties Schedule. beta 2-adrenergic receptor sensitivity (isoproterenol-stimulated cyclic AMP accumulation) and density were determined in lymphocytes. RESULTS Caregivers with high life stress had higher plasma norepinephrine levels (p < .04) but no change in plasma cortisol. For beta-receptor sensitivity, 30% of the variance was accounted for by high life stress rating, increased age, being male, and lower norepinephrine (p = .018); 17% of the variance in beta-receptor density was accounted for by plasma norepinephrine (p = .03). CONCLUSIONS The findings demonstrate that chronic high stress may be associated with changes in adrenergic physiology and may provide a mechanism through which chronic stress alters cellular immunity.
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Affiliation(s)
- P J Mills
- Department of Psychiatry, University of California, San Diego, USA
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Wu JR, Chang HR, Chen SS, Huang TY. Circulating noradrenaline and beta-adrenergic receptors in children with congestive heart failure. Acta Paediatr 1996; 85:923-7. [PMID: 8863872 DOI: 10.1111/j.1651-2227.1996.tb14187.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
This study was designed to investigate changes in plasma catecholamine concentrations and the number of beta-adrenoceptors (beta-AR) of circulating lymphocyte in 94 noncyanotic congenital heart patients. In 43 patients with congestive heart failure, beta-AR density was significantly lower (p < 0.001) and plasma noradrenergic levels were significantly higher (p < 0.001) compared with corresponding values in 51 patients without heart failure. A significant negative correlation between lymphocyte beta-AR density and plasma noradrenergic levels was observed (r = -0.61, p < 0.001). The degree of left-to-right shunt and pulmonary pressure was correlated directly with noradrenaline level and inversely with lymphocyte beta-AR density. Both plasma noradrenaline level and lymphocyte beta-AR density return to normal in children with heart failure after surgical repair. Our results support the idea that changes in noradrenaline level and lymphocyte beta-adrenoceptor density occur concurrently with the presence and severity of heart failure in children.
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Affiliation(s)
- J R Wu
- Department of Paediatrics, School of Medicine, Kaohsiung Medical College, Taiwan
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Dzimiri N, Moorji A. Relationship between alterations in lymphocyte and myocardial beta-adrenoceptor density in patients with left heart valvular disease. Clin Exp Pharmacol Physiol 1996; 23:498-502. [PMID: 8800573 DOI: 10.1111/j.1440-1681.1996.tb02768.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
1. We have evaluated the possibility that alterations in lymphocyte beta-adrenoceptor density may be related to changes in the myocardial population in left heart valvular diseases. Receptor density and their binding affinities were estimated using [125I]-iodocyanopindolol. 2. The lymphocyte (LC) beta-adrenoceptor density was 43.4 +/- 5.6 fmol/mg protein in the controls (n = 35) and 81% lower in heart valvular patients (n = 86). In myocardial controls (n = 18), the left ventricular (LV) receptor density was 167.2 +/- 29.8 fmol/mg protein, right ventricular (RV) density was 123.1 +/- 14.6 fmol/mg, left atrial (LA) density was 81.6 +/- 10.5 fmol/mg and right atrial (RA) 108.1 +/- 14.5 fmol/mg. Compared with this group, the receptor density of the study patients (n = 47) decreased by 67, 43, 24 and 32% in the LV, RV, LA and RA, respectively. The decrease in LC was twice that of the average total myocardial receptor density. 3. When patients were classified according to their left ventricular load conditions as having either left ventricular pressure overload (LVP), left ventricular volume overload, mixed lesions (MOL) and no left ventricular overload (mitral stenosis; NOL), the attenuation in LC receptor density reached statistical significance for all four groups, without showing significant difference between the individual groups. In contrast, the decrease in all chambers was predominantly due to volume overload. MOL and NOL exerted intermediate effects that were significant in the LV, while LVP did not contribute to the changes in the LA. 4. Accordingly, the reduction in peripheral beta-adrenoceptor density may reflect the extent to which particularly the volume overload exerts its influence on myocardial beta-adrenoceptors in left heart valvular patients.
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Affiliation(s)
- N Dzimiri
- Biological and Medical Research Department, King Faisal Specialist Hospital, Riyadh, Saudi Arabia
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