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Wu J, Wu Z, Kuang W, Shi D, Yang Y, Li X, Huang J, Li X, Liao Y, Zhou Z, Qiu Z. Combined vaccines against angiotensin II receptor type 1 and alpha 1D-adrenergic receptor for hypertension. J Hypertens 2024; 42:1184-1196. [PMID: 38690916 DOI: 10.1097/hjh.0000000000003710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2024]
Abstract
PURPOSE Compared with monotherapy, combination therapy with multiple antihypertensive drugs has demonstrated superior efficacy in the management of hypertension. The aim of this study was to explore the efficacy of multitarget combined vaccines in achieving simultaneous antihypertensive and target organ protection effects. METHODS Our team has developed ATRQβ-001 and ADRQβ-004 vaccines targeting Ang II type 1 receptor (AT1R) and α1D-adrenergic receptor (α1D-AR), respectively. In NG-nitroarginine methyl ester ( l -NAME) + abilities spontaneously hypertensive rats (SHRs) model, SHRs were simultaneously inoculated with ATRQβ-001 and ADRQβ-004 vaccines. Histological and biochemical analyses were performed to evaluate the antihypertensive effects and target organ protection of the ATRQβ-001 and ADRQβ-004 combined vaccines in comparison with those of the single vaccine. RESULTS Both ATRQβ-001 and ADRQβ-004 vaccines induced robust antibody production, resulting in persistent high antibody titers in rats. Notably, the combined administration of both vaccines significantly decreased SBP in SHRs compared with treatment with a single vaccine, both before and after l -NAME administration. Furthermore, the combined vaccine regimen demonstrated superior efficacy in protecting against vascular remodeling, myocardial hypertrophy and fibrosis, and kidney injury in SHRs. Mechanistically, the combined vaccines exhibited significantly downregulated the expression of angiotensin II type 1 receptor (AT1R) and α1D-adrenergic receptor (α1D-AR). Importantly, no apparent immune-related adverse effects were observed in animals immunized with the combined vaccines. CONCLUSION Preliminary findings from this investigation suggest that co-administration of the novel ATRQβ-001 and ADRQβ-004 vaccines holds potential as a groundbreaking therapeutic strategy for managing hypertension.
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Affiliation(s)
- Jiacheng Wu
- Department of Cardiology, Union Hospital, Tongji Medical college, Huazhong University of Science and Technology
- Hubei Key Laboratory of Biological Targeted Therapy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology
- Hubei Engineering Research Center for Immunological Diagnosis and Therapy of Cardiovascular Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology
| | - Zhijie Wu
- Department of Cardiology, Union Hospital, Tongji Medical college, Huazhong University of Science and Technology
- Hubei Key Laboratory of Biological Targeted Therapy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology
- Hubei Engineering Research Center for Immunological Diagnosis and Therapy of Cardiovascular Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology
| | - Wenlong Kuang
- Department of Cardiology, Traditional Chinese and Western Medicine Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
- Department of Cardiology, Wuhan No.1 Hospital, Wuhan, Hubei, China
| | - Dingyang Shi
- Department of Cardiology, Union Hospital, Tongji Medical college, Huazhong University of Science and Technology
- Hubei Key Laboratory of Biological Targeted Therapy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology
- Hubei Engineering Research Center for Immunological Diagnosis and Therapy of Cardiovascular Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology
| | - Yulu Yang
- Department of Cardiology, Union Hospital, Tongji Medical college, Huazhong University of Science and Technology
- Hubei Key Laboratory of Biological Targeted Therapy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology
- Hubei Engineering Research Center for Immunological Diagnosis and Therapy of Cardiovascular Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology
| | - Xin Li
- Department of Cardiology, Union Hospital, Tongji Medical college, Huazhong University of Science and Technology
- Hubei Key Laboratory of Biological Targeted Therapy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology
- Hubei Engineering Research Center for Immunological Diagnosis and Therapy of Cardiovascular Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology
| | - Jianwu Huang
- Department of Cardiology, Union Hospital, Tongji Medical college, Huazhong University of Science and Technology
- Hubei Key Laboratory of Biological Targeted Therapy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology
- Hubei Engineering Research Center for Immunological Diagnosis and Therapy of Cardiovascular Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology
| | - Xuehan Li
- Department of Cardiology, Union Hospital, Tongji Medical college, Huazhong University of Science and Technology
- Hubei Key Laboratory of Biological Targeted Therapy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology
- Hubei Engineering Research Center for Immunological Diagnosis and Therapy of Cardiovascular Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology
| | - Yuhua Liao
- Department of Cardiology, Union Hospital, Tongji Medical college, Huazhong University of Science and Technology
- Hubei Key Laboratory of Biological Targeted Therapy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology
- Hubei Engineering Research Center for Immunological Diagnosis and Therapy of Cardiovascular Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology
| | - Zihua Zhou
- Department of Cardiology, Union Hospital, Tongji Medical college, Huazhong University of Science and Technology
- Hubei Key Laboratory of Biological Targeted Therapy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology
- Hubei Engineering Research Center for Immunological Diagnosis and Therapy of Cardiovascular Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology
| | - Zhihua Qiu
- Department of Cardiology, Union Hospital, Tongji Medical college, Huazhong University of Science and Technology
- Hubei Key Laboratory of Biological Targeted Therapy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology
- Hubei Engineering Research Center for Immunological Diagnosis and Therapy of Cardiovascular Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology
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van Gastel J, Leysen H, Boddaert J, Vangenechten L, Luttrell LM, Martin B, Maudsley S. Aging-related modifications to G protein-coupled receptor signaling diversity. Pharmacol Ther 2020; 223:107793. [PMID: 33316288 DOI: 10.1016/j.pharmthera.2020.107793] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Accepted: 11/26/2020] [Indexed: 02/06/2023]
Abstract
Aging is a highly complex molecular process, affecting nearly all tissue systems in humans and is the highest risk factor in developing neurodegenerative disorders such as Alzheimer's and Parkinson's disease, cardiovascular disease and Type 2 diabetes mellitus. The intense complexity of the aging process creates an incentive to develop more specific drugs that attenuate or even reverse some of the features of premature aging. As our current pharmacopeia is dominated by therapeutics that target members of the G protein-coupled receptor (GPCR) superfamily it may be prudent to search for effective anti-aging therapeutics in this fertile domain. Since the first demonstration of GPCR-based β-arrestin signaling, it has become clear that an enhanced appreciation of GPCR signaling diversity may facilitate the creation of therapeutics with selective signaling activities. Such 'biased' ligand signaling profiles can be effectively investigated using both standard molecular biological techniques as well as high-dimensionality data analyses. Through a more nuanced appreciation of the quantitative nature across the multiple dimensions of signaling bias that drugs possess, researchers may be able to further refine the efficacy of GPCR modulators to impact the complex aberrations that constitute the aging process. Identifying novel effector profiles could expand the effective pharmacopeia and assist in the design of precision medicines. This review discusses potential non-G protein effectors, and specifically their potential therapeutic suitability in aging and age-related disorders.
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Affiliation(s)
- Jaana van Gastel
- Receptor Biology Lab, Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium; Faculty of Pharmacy, Biomedical and Veterinary Science, University of Antwerp, Antwerp, Belgium
| | - Hanne Leysen
- Receptor Biology Lab, Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium; Faculty of Pharmacy, Biomedical and Veterinary Science, University of Antwerp, Antwerp, Belgium
| | - Jan Boddaert
- Molecular Pathology Group, Faculty of Medicine and Health Sciences, Laboratory of Cell Biology and Histology, Antwerp, Belgium
| | - Laura Vangenechten
- Receptor Biology Lab, Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
| | - Louis M Luttrell
- Division of Endocrinology, Diabetes & Medical Genetics, Medical University of South Carolina, USA
| | - Bronwen Martin
- Faculty of Pharmacy, Biomedical and Veterinary Science, University of Antwerp, Antwerp, Belgium
| | - Stuart Maudsley
- Receptor Biology Lab, Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium; Faculty of Pharmacy, Biomedical and Veterinary Science, University of Antwerp, Antwerp, Belgium.
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Li C, Yan X, Wu D, Zhang K, Liang X, Pan Y, Zhou Y, Chen F, Chen X, Yang S, Zhou Z, Wei Y, Liao Y, Qiu Z. Vaccine Targeted Alpha 1D-Adrenergic Receptor for Hypertension. Hypertension 2019; 74:1551-1562. [PMID: 31607175 DOI: 10.1161/hypertensionaha.119.13700] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The α1-AR (α1 adrenergic receptor) blockers currently on the market cannot meet clinical needs because of low-selectivity for subtypes of α1-ARs, short half-life, and uncertain role in cardiovascular end point events. The study sought to find a vaccine specifically against α1D-AR (α1D-adrenergic receptor) for treating hypertension. A short peptide ADR-004 (cgiteeagy) belonging to α1D-AR was screened, and the ADRQβ-004 vaccine was produced and injected into spontaneously hypertensive rats model (including a short-term study, 10 weeks, and a long-term observation study, 39 weeks) and NG-nitro-l-arginine methyl ester + spontaneously hypertensive rats model (15 weeks). The antihypertensive effect and target organ protection of the ADRQβ-004 vaccine were carefully evaluated. The possible immune-mediated damage was detected in normal vaccinated Sprague Dawley rats. The ADR-004 peptide has perfect immunogenicity, and the ADRQβ-004 vaccine could induce strong antibody production. In the short-term study, the ADRQβ-004 vaccine averagely decreased the systolic blood pressure of spontaneously hypertensive rats up to 15 mm Hg and that of NG-nitro-l-arginine methyl ester+spontaneously hypertensive rats up to 29 mm Hg. In the long-term observation model, the antihypertensive effect of the ADRQβ-004 vaccine was quite stable, and the average decline of systolic blood pressure was 22 mm Hg. The ADRQβ-004 vaccine effectively prevented vascular structural remodeling, cardiac hypertrophy and fibrosis, and renal injury of hypertensive animals, superior to prazosin at renal level. Moreover, the ADRQβ-004 vaccine obviously downregulated the expression of α1D-AR, but not α1A-AR. Additionally, no significant immune-mediated damage was detected in immunized animals. The present results demonstrate that the ADRQβ-004 vaccine may provide a novel and promising method for the treatment of hypertension.
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Affiliation(s)
- Chang Li
- From the Department of Cardiology (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Institute of Cardiology (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Key Lab of Molecular Biological Targeted Therapies of the Ministry of Education (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiaole Yan
- From the Department of Cardiology (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Institute of Cardiology (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Key Lab of Molecular Biological Targeted Therapies of the Ministry of Education (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Danyu Wu
- From the Department of Cardiology (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Institute of Cardiology (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Key Lab of Molecular Biological Targeted Therapies of the Ministry of Education (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Kai Zhang
- From the Department of Cardiology (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Institute of Cardiology (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Key Lab of Molecular Biological Targeted Therapies of the Ministry of Education (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xin Liang
- Medical Statistics Office, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China (X.L.)
| | - Yajie Pan
- From the Department of Cardiology (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Institute of Cardiology (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Key Lab of Molecular Biological Targeted Therapies of the Ministry of Education (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yanzhao Zhou
- From the Department of Cardiology (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Institute of Cardiology (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Key Lab of Molecular Biological Targeted Therapies of the Ministry of Education (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Fen Chen
- From the Department of Cardiology (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Institute of Cardiology (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Key Lab of Molecular Biological Targeted Therapies of the Ministry of Education (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiao Chen
- From the Department of Cardiology (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Institute of Cardiology (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Key Lab of Molecular Biological Targeted Therapies of the Ministry of Education (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Shijun Yang
- From the Department of Cardiology (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Institute of Cardiology (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Key Lab of Molecular Biological Targeted Therapies of the Ministry of Education (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zihua Zhou
- From the Department of Cardiology (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Institute of Cardiology (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Key Lab of Molecular Biological Targeted Therapies of the Ministry of Education (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yumiao Wei
- From the Department of Cardiology (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Institute of Cardiology (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Key Lab of Molecular Biological Targeted Therapies of the Ministry of Education (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yuhua Liao
- From the Department of Cardiology (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Institute of Cardiology (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Key Lab of Molecular Biological Targeted Therapies of the Ministry of Education (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zhihua Qiu
- From the Department of Cardiology (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Institute of Cardiology (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Key Lab of Molecular Biological Targeted Therapies of the Ministry of Education (C.L., X.Y., D.W., K.Z., Y.P., Y.Z., F.C., X.C., S.Y., Z.Z., Y.W., Y.L., Z.Q.), Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Aguilera-Méndez A, Espino-García R, Toledo-López ZJ, Hernández-Gallegos Z, Villafaña-Rauda S, Nieto-Aguilar R, Serrato-Ochoa D, Manuel-Jacobo GC. Biotin improves relaxation of rat aortic rings in combination with antihypertensive drugs. PHARMANUTRITION 2019. [DOI: 10.1016/j.phanu.2019.100147] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Yang LK, Tao YX. Physiology and pathophysiology of the β 3-adrenergic receptor. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2018; 161:91-112. [PMID: 30711031 DOI: 10.1016/bs.pmbts.2018.09.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The β3-adrenergic receptor (β3-AR) is an important regulator of various physiological functions, such as thermogenesis in brown adipose tissue, lipolysis in white adipose tissue, negative inotropic effect in cardiomyocyte, and relaxation in blood vessel. The activation of β3-AR by its agonists is shown to have metabolic (antiobesity and antidiabetic) and cardiovascular effects in animal models, highlighting β3-AR as a potential therapeutic target in the treatment of several human diseases. Moreover, a substantial number of studies performed on different populations have identified some β3-AR polymorphic variants associated with obesity, diabetes, cardiovascular diseases, and other disorders. The clinical phenotypes and functional characteristics of these variants provide insights into potential pathophysiological roles of β3-AR in the development of these diseases.
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Affiliation(s)
- Li-Kun Yang
- Department of Anatomy, Physiology and Pharmacology, College of Veterinary Medicine, Auburn University, Auburn, AL, United States
| | - Ya-Xiong Tao
- Department of Anatomy, Physiology and Pharmacology, College of Veterinary Medicine, Auburn University, Auburn, AL, United States.
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The Effect of Chronic NO Synthase Inhibition on the Vasoactive and Structural Properties of Thoracic Aorta, NO Synthase Activity, and Oxidative Stress Biomarkers in Young SHR. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2018; 2018:2502843. [PMID: 30050647 PMCID: PMC6046115 DOI: 10.1155/2018/2502843] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Revised: 05/10/2018] [Accepted: 05/24/2018] [Indexed: 12/12/2022]
Abstract
Although the role of nitric oxide (NO) in essential hypertension is still unclear, the effects of long-term NO deficiency have not yet been investigated during the critical juvenile period in spontaneously hypertensive rats (SHR). We aimed to analyze the effects of chronic NO synthase (NOS) inhibition on systolic blood pressure (sBP), vasoactivity, morphological changes and superoxide level in the thoracic aorta (TA), NOS activity in different tissues, and general biomarkers of oxidative stress in plasma of young SHR. Four-week-old SHR were treated with NG-nitro-L-arginine methyl ester (L-NAME, 50 mg/kg/day, p.o.) for 4-5 weeks. L-NAME treatment induced a transient sBP increase only, and surprisingly, slightly inhibited endothelium-dependent relaxation of TA. Hereby, the inhibition of NOS activity varied from tissue to tissue, ranging from the lowest in the TA and the kidney to the highest in the brain stem. In spite of an increased sensitivity of adrenergic receptors, the maximal adrenergic contraction of TA was unchanged, which was associated with changes in elastin arrangement and an increase in wall thickness. The production of reactive oxygen species in the TA was increased; however, the level of selected biomarkers of oxidative stress did not change. Our findings proved that the TA of young SHR responded to chronic NO deficiency by the development of adaptive mechanisms on the functional (preserved NO-derived vasorelaxation, unincreased contraction) and molecular (preserved NOS activity) level.
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López-Canales OA, Castillo-Hernandez MC, Vargas-Robles H, Rios A, López-Canales JS, Escalante B. Role of adenylyl cyclase in reduced β-adrenoceptor-mediated vasorelaxation during maturation. ACTA ACUST UNITED AC 2017; 49:S0100-879X2016000700605. [PMID: 27383122 PMCID: PMC4942227 DOI: 10.1590/1414-431x20165285] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Accepted: 05/06/2016] [Indexed: 11/25/2022]
Abstract
Beta-adrenergic receptor (βAR)-dependent blood vessel relaxation is impaired in older animals and G protein activation has been suggested as the causative mechanism. Here, we investigated the role of βAR subtypes (β1AR, β2AR, and β3AR) and cAMP in maturation-dependent vasorelaxation impairment. Aortic rings from 15 Sprague-Dawley male rats (3 or 9 weeks old) were harvested and left intact or denuded of the endothelium. Vascular relaxation in aortic rings from younger and older groups was compared in the presence of βAR subtype agonists and antagonists along with cAMP and cGMP antagonists. Isolated aortic rings were used to evaluate relaxation responses, protein expression was evaluated by western blot or real time PCR, and metabolites were measured by ELISA. Expression of βAR subtypes and adenylyl cyclase was assessed, and cAMP activity was measured in vascular tissue from both groups. Isoproterenol- and BRL744-dependent relaxation in aortic rings with and without endothelium from 9-week-old rats was impaired compared with younger rats. The β1AR antagonist CGP20712A (10-7 M) did not affect isoproterenol or BRL744-dependent relaxation in arteries from either group. The β2AR antagonist ICI-118,551 (10-7 M) inhibited isoproterenol-dependent aortic relaxation in both groups. The β3AR antagonist SR59230A (10-7 M) inhibited isoproterenol- and BRL744-dependent aortic ring relaxation in younger but not in older rats. All βAR subtypes were expressed in both groups, although β3AR expression was lower in the older group. Adenylyl cyclase (SQ 22536) or protein kinase A (H89) inhibitors prevented isoproterenol-induced relaxation in younger but not in older rats. Production of cAMP was reduced in the older group. Adenylyl cyclase III and RyR3 protein expression was higher in the younger group. In conclusion, altered expression of β3AR and adenylyl cyclase III may be responsible for reduced cAMP production in the older group.
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Affiliation(s)
- O A López-Canales
- Molecular Biomedicine Department, Center of Research and Advanced Studies, Unidad Zacatenco, Mexico City, Mexico
| | - M C Castillo-Hernandez
- Pharmacology Department, Superior School of Medicine, Polytechnic National Institute, Mexico City, Mexico
| | - H Vargas-Robles
- Molecular Biomedicine Department, Center of Research and Advanced Studies, Unidad Zacatenco, Mexico City, Mexico
| | - A Rios
- Center of Research and Advanced Studies, Monterrey, Nuevo León, Mexico
| | - J S López-Canales
- Pharmacology Department, Superior School of Medicine, Polytechnic National Institute, Mexico City, Mexico.,Perinatology National Institute "Isidro Espinosa de los Reyes", Mexico City, Mexico
| | - B Escalante
- Center of Research and Advanced Studies, Monterrey, Nuevo León, Mexico
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8
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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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9
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Bencze M, Behuliak M, Vavřínová A, Zicha J. Altered contractile responses of arteries from spontaneously hypertensive rat: The role of endogenous mediators and membrane depolarization. Life Sci 2016; 166:46-53. [DOI: 10.1016/j.lfs.2016.10.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Revised: 09/19/2016] [Accepted: 10/05/2016] [Indexed: 11/25/2022]
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10
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Yang J, Villar VAM, Armando I, Jose PA, Zeng C. G Protein-Coupled Receptor Kinases: Crucial Regulators of Blood Pressure. J Am Heart Assoc 2016; 5:JAHA.116.003519. [PMID: 27390269 PMCID: PMC5015388 DOI: 10.1161/jaha.116.003519] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Jian Yang
- Department of Nutrition, Daping Hospital, The Third Military Medical University, Chongqing, China Department of Cardiology, Chongqing Key Laboratory for Hypertension, Chongqing Institute of Cardiology, Chongqing Cardiovascular Clinical Research Center, Daping Hospital, The Third Military Medical University, Chongqing, China
| | - Van Anthony M Villar
- Division of Renal Diseases & Hypertension, Department of Medicine, The George Washington University School of Medicine and Health Sciences, Washington, DC
| | - Ines Armando
- Division of Renal Diseases & Hypertension, Department of Medicine, The George Washington University School of Medicine and Health Sciences, Washington, DC
| | - Pedro A Jose
- Division of Renal Diseases & Hypertension, Department of Medicine, The George Washington University School of Medicine and Health Sciences, Washington, DC Department of Pharmacology and Physiology, The George Washington University School of Medicine and Health Sciences, Washington, DC
| | - Chunyu Zeng
- Department of Cardiology, Chongqing Key Laboratory for Hypertension, Chongqing Institute of Cardiology, Chongqing Cardiovascular Clinical Research Center, Daping Hospital, The Third Military Medical University, Chongqing, China
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11
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Alves-Wagner AB, Mori RC, Sabino-Silva R, Fatima LA, da Silva Alves A, Britto LR, D'Agord Schaan B, Machado UF. Beta-adrenergic blockade increases GLUT4 and improves glycemic control in insulin-treated diabetic Wistar rats. Auton Neurosci 2015; 193:108-16. [DOI: 10.1016/j.autneu.2015.10.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Revised: 10/25/2015] [Accepted: 10/27/2015] [Indexed: 12/20/2022]
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12
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Increased β2-adrenergic vasorelaxation at the early phase of endotoxemic shock in rats. Vascul Pharmacol 2015; 72:181-9. [PMID: 25921926 DOI: 10.1016/j.vph.2015.04.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Revised: 03/09/2015] [Accepted: 04/20/2015] [Indexed: 12/15/2022]
Abstract
BACKGROUND AND PURPOSE The early management of the cardiovascular dysfunction of septic shock is critical as it is associated with a poor outcome. Although the use of catecholamines is a common therapy in this syndrome, no data are available on the involvement of β-adrenoceptor (β-AR) subtypes and only few studies report an alteration of β-adrenergic-induced vasodilation in septic shock. The purpose of the study was to evaluate vascular β1, β2 and β3-AR expression and function in an endotoxemic rat model. EXPERIMENTAL APPROACH Endotoxemia was induced in rats by intravenous injection of lipopolysaccharide (LPS). β1, β2 and β3-AR mRNA expression was evaluated by RT-PCR in aorta and vascular β1, β2 and β3-AR responses were determined on conducting (aorta) and/or resistance (mesenteric and renal) arteries by constructing relaxation curves in response to different β-AR agonists. RESULTS The maximal effect of isoproterenol decreased by 31 to 61% in the three vascular beds of LPS-treated rats compared to controls. In aortas from LPS-treated rats, β1 and β3-AR mRNA expression was decreased and associated to a reduced β1 and β3-induced vasodilation. Conversely, albeit β2-AR mRNA was unchanged, the maximal β2-AR-induced vasodilation increased by 49% in aortas from LPS-treated rats compared to controls. This increase was not affected by endothelium removal but was abolished in the presence of a β2-AR antagonist or an adenylate cyclase inhibitor. CONCLUSIONS In endotoxemia, β2-AR vasodilation was increased by a potential recruitment of β2-AR located on smooth muscle cells. This study suggests that vascular β2-AR should be a putative new therapeutic target in septic shock.
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Montó F, Arce C, Noguera MA, Ivorra MD, Flanagan J, Roller M, Issaly N, D'Ocon P. Action of an extract from the seeds of Fraxinus excelsior L. on metabolic disorders in hypertensive and obese animal models. Food Funct 2014; 5:786-96. [PMID: 24573510 DOI: 10.1039/c3fo60539f] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nuzhenide and GI3, the principal secoiridoids of an extract obtained from the seeds of Fraxinus excelsior L. (FXE), are believed to be the active compounds responsible for the previously reported hypoglycemic effects of this extract. In this study, the effects of FXE were studied in two animal models which are representative of metabolic disorders: spontaneously hypertensive rats (SHR) and obese Zucker rats. SHR were acutely treated (oral gavage) with different doses of FXE. In addition, SHR and Zucker rats were chronically fed (20 or 5 weeks, respectively) with standard chow supplemented with FXE. Acute treatment with FXE (200 mg per kg body weight) decreased systolic blood pressure as in the case with captopril (50 mg per kg body weight). Chronic treatment with FXE at 100 mg per kg body weight per day, a dose equivalent to that showing hypoglycemic activity in humans, resulted in a significant decrease in glycemia (-16.3%), triglyceridemia (-33.4%) and body weight (-8.1%) in Zucker rats as well as a significant decrease in SBP in SHR (-6.7%), with a concomitant improvement in endothelial function in both strains. The broad-ranging effects of FXE may be due to a unique compositional profile that could be useful to prevent the metabolic syndrome, characterized by obesity, insulin resistance, glucose intolerance, hypertriglyceridemia and elevated blood pressure.
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Affiliation(s)
- Fermí Montó
- Departamento de Farmacología, Facultat de Farmàcia, Universitat de València, Avda. Vicent Andrés Estelles s/n, Burjassot, 46100 Valencia, Spain.
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14
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Flacco N, Segura V, Perez-Aso M, Estrada S, Seller JF, Jiménez-Altayó F, Noguera MA, D'Ocon P, Vila E, Ivorra MD. Different β-adrenoceptor subtypes coupling to cAMP or NO/cGMP pathways: implications in the relaxant response of rat conductance and resistance vessels. Br J Pharmacol 2014; 169:413-25. [PMID: 23373597 DOI: 10.1111/bph.12121] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2012] [Revised: 01/07/2013] [Accepted: 01/18/2013] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND AND PURPOSE To analyse the relative contribution of β1 -, β2 - and β3 -adrenoceptors (Adrb) to vasodilatation in conductance and resistance vessels, assessing the role of cAMP and/or NO/cGMP signalling pathways. EXPERIMENTAL APPROACH Rat mesenteric resistance artery (MRA) and aorta were used to analyse the Adrb expression by real-time-PCR and immunohistochemistry, and for the pharmacological characterization of Adrb-mediated activity by wire myography and tissue nucleotide accumulation. KEY RESULTS The mRNAs and protein for all Adrb were identified in endothelium and/or smooth muscle cells (SMCs) in both vessels. In MRA, Adrb1 signalled through cAMP, Adrb3 through both cAMP and cGMP, but Adrb2, did not activate nucleotide formation; isoprenaline relaxation was inhibited by propranolol (β1 , β2 ), CGP20712A (β1 ), and SQ22536 (adenylyl cyclase inhibitor), but not by ICI118,551 (β2 ), SR59230A (β3 ), ODQ (soluble guanylyl cyclase inhibitor), L-NAME or endothelium removal. In aorta, Adrb1 signalled through cAMP, while β2 - and β3 -subtypes through cGMP; isoprenaline relaxation was inhibited by propranolol, ICI118,551, ODQ, L-NAME, and to a lesser extent, by endothelium removal. CL316243 (β3 -agonist) relaxed aorta, but not MRA. CONCLUSION AND IMPLICATION Despite all three Adrb subtypes being found in both vessels, Adrb1, located in SMCs and acting through the adenylyl cyclase/cAMP pathway, are primarily responsible for vasodilatation in MRA. However, Adrb-mediated vasodilatation in aorta is driven by endothelial Adrb2 and Adrb3, but also by the Adrb2 present in SMCs, and is coupled to the NO/cGMP pathway. These results could help to understand the different physiological roles played by Adrb signalling in regulating conductance and resistance vessels.
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Affiliation(s)
- N Flacco
- Departament de Farmacologia, Facultat de Farmacia, Universitat de Valencia, Burjassot, Spain
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15
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Queiroz ACC, Sousa JCS, Cavalli AAP, Silva ND, Costa LAR, Tobaldini E, Montano N, Silva GV, Ortega K, Mion D, Tinucci T, Forjaz CLM. Post-resistance exercise hemodynamic and autonomic responses: Comparison between normotensive and hypertensive men. Scand J Med Sci Sports 2014; 25:486-94. [DOI: 10.1111/sms.12280] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/28/2014] [Indexed: 01/04/2023]
Affiliation(s)
- A. C. C. Queiroz
- Exercise Hemodynamic Laboratory; School of Physical Education and Sport; University of São Paulo; São Paulo Brazil
| | - J. C. S. Sousa
- Exercise Hemodynamic Laboratory; School of Physical Education and Sport; University of São Paulo; São Paulo Brazil
| | - A. A. P. Cavalli
- Exercise Hemodynamic Laboratory; School of Physical Education and Sport; University of São Paulo; São Paulo Brazil
| | - N. D. Silva
- Exercise Hemodynamic Laboratory; School of Physical Education and Sport; University of São Paulo; São Paulo Brazil
| | - L. A. R. Costa
- Exercise Hemodynamic Laboratory; School of Physical Education and Sport; University of São Paulo; São Paulo Brazil
| | - E. Tobaldini
- Department of Biomedical and Clinical Sciences “L. Sacco”, Medicine and Physiopathology; L. Sacco Hospital; University of Milan; Milan Italy
| | - N. Montano
- Department of Biomedical and Clinical Sciences “L. Sacco”, Medicine and Physiopathology; L. Sacco Hospital; University of Milan; Milan Italy
| | - G. V. Silva
- Hypertension Unit; General Hospital; University of São Paulo; São Paulo Brazil
| | - K. Ortega
- Hypertension Unit; General Hospital; University of São Paulo; São Paulo Brazil
| | - D. Mion
- Hypertension Unit; General Hospital; University of São Paulo; São Paulo Brazil
| | - T. Tinucci
- Exercise Hemodynamic Laboratory; School of Physical Education and Sport; University of São Paulo; São Paulo Brazil
- Hypertension Unit; General Hospital; University of São Paulo; São Paulo Brazil
| | - C. L. M. Forjaz
- Exercise Hemodynamic Laboratory; School of Physical Education and Sport; University of São Paulo; São Paulo Brazil
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16
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Oliver E, Flacco N, Arce C, Ivorra MD, D'Ocon MP, Noguera MA. Changes in adrenoceptors and G-protein-coupled receptor kinase 2 in L-NAME-induced hypertension compared to spontaneous hypertension in rats. J Vasc Res 2014; 51:209-20. [PMID: 24942010 DOI: 10.1159/000360400] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Accepted: 01/31/2014] [Indexed: 11/19/2022] Open
Abstract
This work compares the expression of adrenoceptors (ARs) and G-protein-coupled receptor kinase (GRK) 2 (RT-PCR and immunoblotting) and functional responses in conductance (aorta) and resistance vessels (mesenteric resistance arteries; MRA) in two different models of rat hypertension: hypertension induced by chronic treatment with L-NAME (N(G)-nitro-L-arginine methyl-ester) (L-NAME-treated rats; LNHR), and genetically induced hypertension (spontaneously hypertensive rats; SHR). Changes found in the aorta, but not in the MRA, were: (1) a loss of contractile capacity, more evidently in α1-AR-mediated contraction, and an impairment of endothelium-dependent vasorelaxation, with both changes occurring independently of the hypertensive model; (2) a diminished sensitivity to α1-AR-induced vasoconstriction along with increased β2-AR-mediated vasodilation in LNHR, and (3) a lower expression of ARs and GRK2 in LNHR. The two latter changes are the opposite of those previously found in aortas of SHR. In the MRA of LNHR, a diminished sensitivity to isoprenaline, in parallel with a reduced expression of β1-AR, was observed without changes in GRK2 expression. In the MRA of SHR, the increased GRK2 expression was not accompanied by significant changes in either β-AR expression or the vasorelaxant potency of isoprenaline. The present results highlight that changes in AR function differ not only between vessels but also between hypertensive models. Moreover, they suggest that changes in GRK2 expression could contribute to regulating β2-AR function in conductance vessels but not β1-AR function in resistance vessels.
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Affiliation(s)
- Eduardo Oliver
- Departamento de Farmacología, Facultad de Farmacia, Universitat de València, Valencia, Spain
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17
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Perez-Aso M, Flacco N, Carpena N, Montesinos MC, D'Ocon P, Ivorra MD. β-Adrenoceptors differentially regulate vascular tone and angiogenesis of rat aorta via ERK1/2 and p38. Vascul Pharmacol 2014; 61:80-9. [PMID: 24768830 DOI: 10.1016/j.vph.2014.04.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2014] [Revised: 04/11/2014] [Accepted: 04/12/2014] [Indexed: 01/14/2023]
Abstract
β-Adrenoceptors (β-ARs) modulate ERK1/2 and p38 in different cells, but little is known about the contribution of these signaling pathways to the function of β-ARs in vascular tissue. Immunoblotting analysis of rat aortic rings, primary endothelial (ECs) and smooth muscle cells (SMCs) isolated from aorta showed that β-AR stimulation with isoprenaline activated p38 in aortic rings and in both cultured cell types, whereas it had a dual effect on ERK1/2 phosphorylation, decreasing it in ECs while increasing it in SMCs. These effects were reversed by propranolol, which by itself increased p-ERK1/2 in ECs. Isoprenaline β-AR mediated vasodilation of aortic rings was potentiated by the ERK1/2 inhibitor, U0126, in the presence or absence of endothelium or L-NAME, whereas inhibition of p38 had no impact. Isoprenaline moderately decreased sprouting from aorta rings in the Matrigel angiogenesis assay; conversely propranolol not only prevented isoprenaline inhibition, but stimulated angiogenesis. ERK1/2 inhibition decreased angiogenesis, while a dramatic stimulation was observed by p38 blockade. Our results suggest that ERK1/2 activation after β-ARs stimulation in the smooth muscle hinders the vasodilator effect of isoprenaline, but in the endothelium β-ARs decreases ERK1/2 and increases p38 activity reducing therefore angiogenesis.
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Affiliation(s)
- Miguel Perez-Aso
- Departament de Farmacologia, Facultat de Farmàcia, Universitat de València, 46100 Burjassot, Spain
| | - Nicla Flacco
- Departament de Farmacologia, Facultat de Farmàcia, Universitat de València, 46100 Burjassot, Spain
| | - Nuria Carpena
- Departament de Farmacologia, Facultat de Farmàcia, Universitat de València, 46100 Burjassot, Spain
| | - M Carmen Montesinos
- Departament de Farmacologia, Facultat de Farmàcia, Universitat de València, 46100 Burjassot, Spain; Institut de Reconociment Molecular i Desenvolupament Tecnològic, Centre Mixte Universitat Politècnica de València - Universitat de València, Spain
| | - Pilar D'Ocon
- Departament de Farmacologia, Facultat de Farmàcia, Universitat de València, 46100 Burjassot, Spain
| | - M Dolores Ivorra
- Departament de Farmacologia, Facultat de Farmàcia, Universitat de València, 46100 Burjassot, Spain.
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18
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Pintérová M, Behuliak M, Kuneš J, Zicha J. Involvement of BKCa and KV potassium channels in cAMP-induced vasodilatation: their insufficient function in genetic hypertension. Physiol Res 2014; 63:275-85. [PMID: 24397812 DOI: 10.33549/physiolres.932718] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Spontaneously hypertensive rats (SHR) are characterized by enhanced sympathetic vasoconstriction, whereas their vasodilator mechanisms are relatively attenuated compared to their high BP. The objective of our in vivo study was to evaluate whether the impaired function of BKCa and/or KV channels is responsible for abnormal cAMP-induced vasodilatation in genetic hypertension. Using conscious SHR and normotensive WKY rats we have shown that under the basal conditions cAMP overproduction elicited by the infusion of beta-adrenoceptor agonist (isoprenaline) caused a more pronounced decrease of baseline blood pressure (BP) in SHR compared to WKY rats. Isoprenaline infusion prevented BP rises induced by acute NO synthase blockade in both strains and it also completely abolished the fully developed BP response to NO synthase blockade. These cAMP-induced vasodilator effects were diminished by the inhibition of either BKCa or KV channels in SHR but simultaneous blockade of both K(+) channel types was necessary in WKY rats. Under basal conditions, the vasodilator action of both K(+) channels was enhanced in SHR compared to WKY rats. However, the overall contribution of K(+) channels to cAMP-induced vasodilator mechanisms is insufficient in genetic hypertension since a concurrent activation of both K(+) channels by cAMP overproduction is necessary for the prevention of BP rise elicited by acute NO/cGMP deficiency in SHR. This might be caused by less effective activation of these K(+) channels by cAMP in SHR. In conclusion, K(+) channels seem to have higher activity in SHR, but their vasodilator action cannot match sufficiently the augmented vasoconstriction in this hypertensive strain.
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Affiliation(s)
- M Pintérová
- Institute of Physiology, Academy of Sciences of the Czech Republic, Prague, Czech Republic.
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Segura V, Pérez-Aso M, Montó F, Carceller E, Noguera MA, Pediani J, Milligan G, McGrath IC, D’Ocon P. Differences in the signaling pathways of α(1A)- and α(1B)-adrenoceptors are related to different endosomal targeting. PLoS One 2013; 8:e64996. [PMID: 23717684 PMCID: PMC3663791 DOI: 10.1371/journal.pone.0064996] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2012] [Accepted: 04/20/2013] [Indexed: 01/14/2023] Open
Abstract
AIMS To compare the constitutive and agonist-dependent endosomal trafficking of α(1A)- and α(1B)-adrenoceptors (ARs) and to establish if the internalization pattern determines the signaling pathways of each subtype. METHODS Using CypHer5 technology and VSV-G epitope tagged α(1A)- and α(1B)-ARs stably and transiently expressed in HEK 293 cells, we analyzed by confocal microscopy the constitutive and agonist-induced internalization of each subtype, and the temporal relationship between agonist induced internalization and the increase in intracellular calcium (determined by FLUO-3 flouorescence), or the phosphorylation of ERK1/2 and p38 MAP kinases (determined by Western blot). RESULTS AND CONCLUSIONS Constitutive as well as agonist-induced trafficking of α(1A) and α(1B) ARs maintain two different endosomal pools of receptors: one located close to the plasma membrane and the other deeper into the cytosol. Each subtype exhibited specific characteristics of internalization and distribution between these pools that determines their signaling pathways: α(1A)-ARs, when located in the plasma membrane, signal through calcium and ERK1/2 pathways but, when translocated to deeper endosomes, through a mechanism sensitive to β-arrestin and concanavalin A, continue signaling through ERK1/2 and also activate the p38 pathway. α(1B)-ARs signal through calcium and ERK1/2 only when located in the membrane and the signals disappear after endocytosis and by disruption of the membrane lipid rafts by methyl-β-cyclodextrin.
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Affiliation(s)
- Vanessa Segura
- Departamento de Farmacología, Facultad de Farmacia, Universitat de València, Valencia, Spain
| | - Miguel Pérez-Aso
- Departamento de Farmacología, Facultad de Farmacia, Universitat de València, Valencia, Spain
| | - Fermí Montó
- Departamento de Farmacología, Facultad de Farmacia, Universitat de València, Valencia, Spain
| | - Elena Carceller
- Departamento de Farmacología, Facultad de Farmacia, Universitat de València, Valencia, Spain
| | - María Antonia Noguera
- Departamento de Farmacología, Facultad de Farmacia, Universitat de València, Valencia, Spain
| | - John Pediani
- Molecular Pharmacology Group, Institute of Molecular, Cell and Systems Biology, College of Medical, Veterinary and Life Sciences. University of Glasgow, Glasgow, United Kingdom
- Autonomic Physiology Unit, School of Life Sciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Graeme Milligan
- Molecular Pharmacology Group, Institute of Molecular, Cell and Systems Biology, College of Medical, Veterinary and Life Sciences. University of Glasgow, Glasgow, United Kingdom
| | - Ian Christie McGrath
- Autonomic Physiology Unit, School of Life Sciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Pilar D’Ocon
- Departamento de Farmacología, Facultad de Farmacia, Universitat de València, Valencia, Spain
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Bojic T, Sudar E, Mikhailidis D, Alavantic D, Isenovic E. The role of G protein coupled receptor kinases in neurocardiovascular pathophysiology. Arch Med Sci 2012; 8:970-7. [PMID: 23319968 PMCID: PMC3542506 DOI: 10.5114/aoms.2012.29996] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2012] [Revised: 06/14/2012] [Accepted: 06/29/2012] [Indexed: 12/15/2022] Open
Abstract
In coronary artery disease the G protein related kinases (GRKs) play a role in desensitization of β-adrenoreceptors (AR) after coronary occlusion. Targeted deletion and lowering of cardiac myocyte GRK-2 decreases the risk of post-ischemic heart failure (HF). Studies carried out in humans confirm the role of GRK-2 as a marker for the progression of HF after myocardial infarction (MI). The level of GRK-2 could be an indicator of β-AR blocker efficacy in patients with acute coronary syndrome. Elevated levels of GRK-2 are an early ubiquitous consequence of myocardial injury. In hypertension an increased level of GRK-2 was reported in both animal models and human studies. The role of GRKs in vagally mediated disorders such as vasovagal syncope and atrial fibrillation remains controversial. The role of GRKs in the pathogenesis of neurocardiological diseases provides an insight into the molecular pathogenesis process, opens potential therapeutic options and suggests new directins for scientific research.
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Affiliation(s)
- Tijana Bojic
- Institute of Nuclear Sciences Vinča, University of Belgrade, Laboratory of Radiobiology and Molecular Genetics, Belgrade, Serbia
| | - Emina Sudar
- Institute of Nuclear Sciences Vinča, University of Belgrade, Laboratory of Radiobiology and Molecular Genetics, Belgrade, Serbia
| | - Dimitri Mikhailidis
- Department of Clinical Biochemistry (Vascular Disease Prevention Clinics), Royal Free Hospital Campus, University College London Medical School, UK
| | - Dragan Alavantic
- Institute of Nuclear Sciences Vinča, University of Belgrade, Laboratory of Radiobiology and Molecular Genetics, Belgrade, Serbia
| | - Esma Isenovic
- Institute of Nuclear Sciences Vinča, University of Belgrade, Laboratory of Radiobiology and Molecular Genetics, Belgrade, Serbia
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Martínez-Revelles S, Caracuel L, Márquez-Martín A, Dantas A, Oliver E, D'Ocon P, Vila E. Increased endothelin-1 vasoconstriction in mesenteric resistance arteries after superior mesenteric ischaemia-reperfusion. Br J Pharmacol 2012; 165:937-50. [PMID: 21806604 PMCID: PMC3312490 DOI: 10.1111/j.1476-5381.2011.01617.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2010] [Revised: 07/05/2011] [Accepted: 07/12/2011] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND AND PURPOSE Endothelin-1 (ET-1) plays an important role in the maintenance of vascular tone. We aimed to evaluate the influence of superior mesenteric artery (SMA) ischaemia-reperfusion (I/R) on mesenteric resistance artery vasomotor function and the mechanism involved in the changes in vascular responses to ET-1. EXPERIMENTAL APPROACH SMA from male Sprague-Dawley rats was occluded (90 min) and following reperfusion (24h), mesenteric resistance arteries were dissected. Vascular reactivity was studied using wire myography. Protein and mRNA expression, superoxide anion (O(2) (•-) ) production and ET-1 plasma concentration were evaluated by immunofluorescence, real-time quantitative PCR, ethidium fluorescence and elisa, respectively. KEY RESULTS I/R increased ET-1 plasma concentration, ET-1-mediated vasoconstriction and ET(B) mRNA expression, and down-regulated ET(A) mRNA expression. Immunofluorescence confirmed mRNA results and revealed an increase in ET(B) receptors in the mesenteric resistance artery media layer after I/R. Therefore, the ET(B) receptor agonist sarafotoxin-6 induced a contraction that was inhibited by the ET(B) receptor antagonist BQ788 only in vessels, with and without endothelium, from I/R rats. Furthermore, BQ788 potentiated ET-1 vasoconstriction only in sham rats. Endothelium removal in rings from I/R rats unmasked the inhibition of ET-1 vasoconstriction by BQ788. Endothelium removal, N(ω) -nitro-L-arginine methyl ester and superoxide dismutase abolished the differences in ET-1 vasoconstriction between sham and I/R rats. We also found that I/R down-regulates endothelial NOS mRNA expression and concomitantly enhanced O(2) (•-) production by increasing NADPH oxidase 1 (NOX-1) and p(47phox) mRNA. CONCLUSIONS AND IMPLICATIONS Mesenteric I/R potentiated the ET-1-mediated vasoconstriction by a mechanism that involves up-regulation of muscular ET(B) receptors and decrease in NO bioavailability.
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Affiliation(s)
- S Martínez-Revelles
- Departament de Farmacologia, Terapèutica i Toxicologia, Facultat de Medicina, Universitat Autònoma de Barcelona, Bellaterra, Spain
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López-Islas I, López-Sánchez P, Ibarra M, Gallardo-Ortiz IA, Terrón JA. Effect of inter-renal aortic coarctation-induced hypertension on function and expression of vascular α(1A)- and α(1D)-adrenoceptors. Can J Physiol Pharmacol 2011; 90:1-12. [PMID: 22149309 DOI: 10.1139/y11-099] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We investigated the effect of inter-renal aortic coarctation on the function and expression of vascular α(1A)- and α(1D)-adrenoceptors and plasma angiotensin II (ATII) in rats. Male Wistar rats, either sham operated (SO), or with aortic coarctation for 7 (AC7) and 14 days (AC14) were used for agonist-induced pressor responses in vehicle (physiological saline)- and antagonist-treated anesthetized animals, immunoblot analysis (α(1A)- and α(1D)-adrenoceptor in aorta and caudal arteries), and immunoassay (plasma ATII). The α(1D)-adrenoceptor antagonist, BMY-7378 (BMY) blocked noradrenaline-induced responses in the order SO > AC7 ≫ AC14; in contrast, the α(1A)-adrenoceptor antagonist RS-100329 (RS), produced a marginal shift to the right of the dose-response curve to noradrenaline, along with a strong decrease of the maximum pressor effect in the order SO > AC7 = AC14. The potency of the α(1A)-adrenoceptor agonist A-61603 increased in rats with AC14, and responses were inhibited by RS in the order AC14 > AC7 > SO. In aorta, α(1D)-adrenoceptor protein increased in AC7 and decreased in AC14; α(1A)-adrenoreceptor protein increased in the caudal artery of AC7 and returned to control values in AC14. Plasma ATII increased in AC7 and AC14, compared with SO rats. These results suggest an early and direct relationship between ATII and α(1D)-adrenoreceptors in the development of hypertension in this experimental model.
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Affiliation(s)
- Inés López-Islas
- Departamento de Farmacología, Centro de Investigación y de Estudios Avanzados del IPN, Apartado postal 14-740, Zacatenco 07000, México DF, Mexico
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Abstract
Catecholamines play a key role in the regulation of cardiovascular function, classically through ß(1/2)-adrenoreceptors (AR) activation. After ß(3)-AR cloning in the late 1980s, convincing evidence for ß(3)-AR expression and function in cardiovascular tissues recently initiated a reexamination of their involvement in the pathophysiology of cardiovascular diseases. Their upregulation in diseased cardiovascular tissues and resistance to desensitization suggest they may be attractive therapeutic targets. They may substitute for inoperant ß(1/2)-AR to mediate vasodilation in diabetic or atherosclerotic vessels. In cardiac ventricle, their contractile effects are functionally antipathetic to those of ß(1/2)-AR; in normal heart, ß(3)-ARs may mediate a moderate negative inotropic effect, but in heart failure, it may protect against adverse effects of excessive catecholamine stimulation by action on excitation-contraction coupling, electrophysiology, or remodelling. Thus, prospective studies in animals and patients at different stages of heart failure should lead to identify the best therapeutic window to use ß(3)-AR agonists and/or antagonists.
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Agüero J, Almenar L, Montó F, Oliver E, Sánchez-Lázaro I, Vicente D, Martínez-Dolz L, D'Ocon P, Rueda J, Salvador A. Myocardial G protein receptor-coupled kinase expression correlates with functional parameters and clinical severity in advanced heart failure. J Card Fail 2011; 18:53-61. [PMID: 22196842 DOI: 10.1016/j.cardfail.2011.10.008] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2010] [Revised: 09/04/2011] [Accepted: 10/07/2011] [Indexed: 01/08/2023]
Abstract
BACKGROUND In heart failure (HF), sympathetic hyperactivation induces deleterious effects in myocardial β-adrenergic signaling, with receptor down-regulation and desensitization mediated by G protein receptor-coupled kinases (GRKs). We hypothesised that changes in GRK isoforms may be associated with clinical status in advanced HF, using the Interagency Registry for Mechanically Assisted Circulatory Support (INTERMACS) scale. METHODS We included 31 patients with advanced HF undergoing transplantation. According to INTERMACS profiles, mRNA and protein levels of GRK isoforms in left ventricular (LV) myocardium were analyzed and compared with nonfailing LV samples. RESULTS In failing LV myocardium, GRK2 and GRK5 (but not GRK3) protein was up-regulated compared with control samples. Among HF patients, an increase in GRK2 and GRK5 mRNA and protein abundance was observed in β-agonist-treated patients (vs β-blockers: P < .05) and in higher-risk INTERMACS status (profiles 2 and 3 vs 4 and 5: P < .05). A significant negative correlation of GRK2 expression with LV stroke volume supported these findings. CONCLUSIONS Increased GRK2 correlates with clinical severity using the INTERMACS scale and LV stroke volume, supporting it as a potential target in advanced HF. These changes are paralleled by GRK5 expression in the failing myocardium, suggesting a relevant role in human HF.
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Affiliation(s)
- Jaime Agüero
- Heart Failure and Transplant Unit, Department of Cardiology, La Fe University Hospital, Valencia, Spain.
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25
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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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Secemsky E, Lange D, Waters DD, Goldschlager NF, Hsue PY. Hemodynamic and Arrhythmogenic Effects of Cocaine in Hypertensive Individuals. J Clin Hypertens (Greenwich) 2011; 13:744-9. [DOI: 10.1111/j.1751-7176.2011.00520.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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27
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Abstract
Dopamine is an important regulator of systemic blood pressure via multiple mechanisms. It affects fluid and electrolyte balance by its actions on renal hemodynamics and epithelial ion and water transport and by regulation of hormones and humoral agents. The kidney synthesizes dopamine from circulating or filtered L-DOPA independently from innervation. The major determinants of the renal tubular synthesis/release of dopamine are probably sodium intake and intracellular sodium. Dopamine exerts its actions via two families of cell surface receptors, D1-like receptors comprising D1R and D5R, and D2-like receptors comprising D2R, D3R, and D4R, and by interactions with other G protein-coupled receptors. D1-like receptors are linked to vasodilation, while the effect of D2-like receptors on the vasculature is variable and probably dependent upon the state of nerve activity. Dopamine secreted into the tubular lumen acts mainly via D1-like receptors in an autocrine/paracrine manner to regulate ion transport in the proximal and distal nephron. These effects are mediated mainly by tubular mechanisms and augmented by hemodynamic mechanisms. The natriuretic effect of D1-like receptors is caused by inhibition of ion transport in the apical and basolateral membranes. D2-like receptors participate in the inhibition of ion transport during conditions of euvolemia and moderate volume expansion. Dopamine also controls ion transport and blood pressure by regulating the production of reactive oxygen species and the inflammatory response. Essential hypertension is associated with abnormalities in dopamine production, receptor number, and/or posttranslational modification.
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Affiliation(s)
- Ines Armando
- Children’s National Medical Center—Center for Molecular Physiology Research, Washington, District of Columbia
| | - Van Anthony M. Villar
- Children’s National Medical Center—Center for Molecular Physiology Research, Washington, District of Columbia
| | - Pedro A. Jose
- Children’s National Medical Center—Center for Molecular Physiology Research, Washington, District of Columbia
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Pintérová M, Kuneš J, Zicha J. Altered neural and vascular mechanisms in hypertension. Physiol Res 2011; 60:381-402. [PMID: 21615201 DOI: 10.33549/physiolres.932189] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Essential hypertension is a multifactorial disorder which belongs to the main risk factors responsible for renal and cardiovascular complications. This review is focused on the experimental research of neural and vascular mechanisms involved in the high blood pressure control. The attention is paid to the abnormalities in the regulation of sympathetic nervous system activity and adrenoceptor alterations as well as the changes of membrane and intracellular processes in the vascular smooth muscle cells of spontaneously hypertensive rats. These abnormalities lead to increased vascular tone arising from altered regulation of calcium influx through L-VDCC channels, which has a crucial role for excitation-contraction coupling, as well as for so-called "calcium sensitization" mediated by the RhoA/Rho-kinase pathway. Regulation of both pathways is dependent on the complex interplay of various vasodilator and vasoconstrictor stimuli. Two major antagonistic players in the regulation of blood pressure, i.e. sympathetic nervous system (by stimulation of adrenoceptors coupled to stimulatory and inhibitory G proteins) and nitric oxide (by cGMP signaling pathway), elicit their actions via the control of calcium influx through L-VDCC. However, L-type calcium current can also be regulated by the changes in membrane potential elicited by the activation of potassium channels, the impaired function of which was detected in hypertensive animals. The dominant role of enhanced calcium influx in the pathogenesis of high blood pressure of genetically hypertensive animals is confirmed not only by therapeutic efficacy of calcium antagonists but especially by the absence of hypertension in animals in which L-type calcium current was diminished by pertussis toxin-induced inactivation of inhibitory G proteins. Although there is considerable information on the complex neural and vascular alterations in rats with established hypertension, the detailed description of their appearance during the induction of hypertension is still missing.
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Affiliation(s)
- M Pintérová
- Cardiovascular Research Center and Institute of Physiology, Academy of Sciences of the Czech Republic, Prague, Czech Republic.
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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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Segura V, Flacco N, Oliver E, Barettino D, D'Ocon P, Ivorra MD. Alpha1-adrenoceptors in the rat cerebral cortex: new insights into the characterization of alpha1L- and alpha1D-adrenoceptors. Eur J Pharmacol 2010; 641:41-8. [PMID: 20511116 DOI: 10.1016/j.ejphar.2010.05.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2009] [Revised: 04/14/2010] [Accepted: 05/06/2010] [Indexed: 10/19/2022]
Abstract
Among the three alpha(1)-adrenoceptor subtypes (alpha(1A), alpha(1B) and alpha(1D)) a peculiar intracellular localization and poor coupling to membrane signals of cloned alpha(1D)-adrenoceptor have been reported. In addition, the alpha(1L)-adrenoceptor (low affinity for prazosin), a functional phenotype of alpha(1A), has been described. The purpose of this work was to analyze the expression, cellular localization and coupling to membrane signalling (inositol phosphate accumulation) of alpha(1)-adrenoceptor subtypes in a native tissue, the rat cerebral cortex. mRNA for the three subtypes was quantified by real-time RT-PCR (alpha(1D)>alpha(1B)>>alpha(1A)). alpha(1)-Adrenoceptors were also detected by immunoblotting, revealing alpha(1A)- and alpha(1B)-adrenoceptors to be predominantly expressed in the membrane fraction and the alpha(1D)-adrenoceptor to be localized in the cytosolic fraction. Competitive radioligand binding studies revealed the presence of alpha(1D)-adrenoceptor in tissue homogenates, whereas only alpha(1A)- and alpha(1B)-subtypes were detected in membranes. The proportion of alpha(1A)-adrenoceptor increased after treatment with noradrenaline, suggesting differences in agonist-mediated trafficking. Saturation experiments detected high- and low (alpha(1A/L))-prazosin binding sites, the latter of which disappeared on incubation with GppNHp. The alpha(1A/L)-adrenoceptor was heavily implicated in the inositol phosphate response, while the alpha(1D)-subtype did not play a relevant role. These results suggest that the predominant cytosolic localization of alpha(1D)-adrenoceptor lies behind its poor coupling to membrane signalling such as inositol phosphate pathway. The fact that the alpha(1L)-adrenoceptor detected in radioligand binding studies disappeared in the presence of GppNHp implies that it represents a conformational state of the alpha(1A)-adrenoceptor coupled to G-protein.
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Affiliation(s)
- Vanessa Segura
- Departamento de Farmacología, Facultat de Farmàcia, Universitat de València, Avda. Vicent Andrés Estelles s/n, Valencia, Spain
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Alpha(1D)-adrenergic receptor insensitivity is associated with alterations in its expression and distribution in cultured vascular myocytes. Acta Pharmacol Sin 2009; 30:1585-93. [PMID: 19960004 DOI: 10.1038/aps.2009.160] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
AIM It is unclear why alpha(1D)-adrenergic receptors (alpha(1D)-ARs) play a critical role in the mediation of peripheral vascular resistance and blood pressure in situ but function inefficiently when studied in vitro. The present study examined the causes for these inconsistencies in native alpha(1)-adrenergic functional performance between the vascular smooth muscle and myocytes. METHODS The alpha(1)-adrenergic mediated contraction, Ca(2+) signaling and the subcellular receptor distribution were evaluated using the Fluo-4, BODIPY-FL prazosin and subtype-specific antibodies. RESULTS Rat aortic rings and freshly dissociated myocytes displayed contractile and increased intracellular Ca(2+) responses to stimulation with phenylephrine (PE, 10 micromol), respectively. However, the PE-induced responses disappeared completely in cultured aortic myocytes, whereas PE-enhanced Ca(2+) transients were seen in cultured rat cardiac myocytes. Further studies indicated that alpha(1D)-ARs, the major receptor subtype responsible for the alpha(1)-adrenergic regulation of aortic contraction, were distributed both intracellularly and at the cell membrane in freshly dispersed aortic myocytes, similar to the alpha(1A)-AR subcellular localization in the cultured cardiomyocytes. In the cultured aortic myocytes, however, in addition to a marked decrease in their protein expression relative to the aorta, most labeling signals for alpha(1D)-ARs were found in the cytoplasm. Importantly, treating the culture medium with charcoal/dextran caused the reappearance of alpha(1D)-ARs at the cell surface and a partial restoration of the Ca(2+) signal response to PE in approximately 30% of the cultured cells. CONCLUSION Reduction in alpha(1D)-AR total protein expression and disappearance from the cell surface contribute to the insensitivity of cultured vascular smooth muscle cells to alpha(1)-adrenergic receptor activation.
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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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