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Zefirov TL, Khisamieva LI, Khabibrakhmanov II, Ziyatdinova NI, Zefirov AL. α 2C-Adrenergic Receptor Blockade Inhibits Langendorff-Isolated Rat Heart Work. Bull Exp Biol Med 2023; 175:612-615. [PMID: 37864587 DOI: 10.1007/s10517-023-05911-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Indexed: 10/23/2023]
Abstract
We studied the effect of selective α2C-adrenergic receptor antagonist JP-1302 in concentrations of 10-9-10-6 M on inotropy, chronotropy, and coronary flow in the Langendorff-isolated rat heart. JP-1302 in all studied concentrations decreased the left-ventricular myocardium force contraction, HR, and coronary flow. The maximum inotropic, chronotropic, and vascular effects were observed when the antagonist was applied to the perfused solution in a concentration of 10-7 M. The least pronounced decrease in the studied parameters was observed at JP-1302 concentrations of 10-8 and 10-9 M. The obtained data indicate the participation of this subtype of α2-adrenergic receptors in the regulation of activity of isolated adult rats heart.
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Affiliation(s)
- T L Zefirov
- Department of Human Health Protection, Kazan (Volga region) Federal University, Kazan, Republic of Tatarstan, Russia.
| | - L I Khisamieva
- Department of Human Health Protection, Kazan (Volga region) Federal University, Kazan, Republic of Tatarstan, Russia
| | - I I Khabibrakhmanov
- Department of Human Health Protection, Kazan (Volga region) Federal University, Kazan, Republic of Tatarstan, Russia
| | - N I Ziyatdinova
- Department of Human Health Protection, Kazan (Volga region) Federal University, Kazan, Republic of Tatarstan, Russia
| | - A L Zefirov
- Department of Normal Physiology, Kazan State Medical University, Ministry of Health of the Russian Federation, Kazan, Republic of Tatarstan, Russia
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2
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Zheng H, Peri L, Ward GK, Sanders KM, Ward SM. Cardiac PDGFRα + interstitial cells generate spontaneous inward currents that contribute to excitability in the heart. FASEB J 2023; 37:e22929. [PMID: 37086093 PMCID: PMC10402933 DOI: 10.1096/fj.202201712r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 03/06/2023] [Accepted: 04/05/2023] [Indexed: 04/23/2023]
Abstract
The cell types and conductance that contribute to normal cardiac functions remain under investigation. We used mice that express an enhanced green fluorescent protein (eGFP)-histone 2B fusion protein driven off the cell-specific endogenous promoter for Pdgfra to investigate the distribution and functional role of PDGFRα+ cells in the heart. Cardiac PDGFRα+ cells were widely distributed within the endomysium of atria, ventricle, and sino-atrial node (SAN) tissues. PDGFRα+ cells formed a discrete network of cells, lying in close apposition to neighboring cardiac myocytes in mouse and Cynomolgus monkey (Macaca fascicularis) hearts. Expression of eGFP in nuclei allowed unequivocal identification of these cells following enzymatic dispersion of muscle tissues. FACS purification of PDGFRα+ cells from the SAN and analysis of gene transcripts by qPCR revealed that they were a distinct population of cells that expressed gap junction transcripts, Gja1 and Gjc1. Cardiac PDGFRα+ cells generated spontaneous transient inward currents (STICs) and spontaneous transient depolarizations (STDs) that reversed at 0 mV. Reversal potential was maintained when ECl = -40 mV. [Na+ ]o replacement and FTY720 abolished STICs, suggesting they were due to a non-selective cation conductance (NSCC) carried by TRPM7. PDGFRα+ cells also express β2 -adrenoceptor gene transcripts, Adrb2. Zinterol, a selective β2 -receptor agonist, increased the amplitude and frequency of STICs, suggesting these cells could contribute to adrenergic regulation of cardiac excitability. PDGFRα+ cells in cardiac muscles generate inward currents via an NSCC. STICs generated by these cells may contribute to the integrated membrane potentials of cardiac muscles, possibly affecting the frequency of pacemaker activity.
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Affiliation(s)
- Haifeng Zheng
- Department of Physiology & Cell Biology, University of Nevada, Reno School of Medicine, Reno, NV, 89557, USA
| | - Lauren Peri
- Department of Physiology & Cell Biology, University of Nevada, Reno School of Medicine, Reno, NV, 89557, USA
| | - Grace K. Ward
- Department of Physiology & Cell Biology, University of Nevada, Reno School of Medicine, Reno, NV, 89557, USA
| | - Kenton M. Sanders
- Department of Physiology & Cell Biology, University of Nevada, Reno School of Medicine, Reno, NV, 89557, USA
| | - Sean M. Ward
- Department of Physiology & Cell Biology, University of Nevada, Reno School of Medicine, Reno, NV, 89557, USA
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Ke F, Kuang W, Hu X, Li C, Ma W, Shi D, Li X, Wu Z, Zhou Y, Liao Y, Qiu Z, Zhou Z. A novel vaccine targeting β1-adrenergic receptor. Hypertens Res 2023:10.1038/s41440-023-01265-3. [PMID: 36997634 DOI: 10.1038/s41440-023-01265-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 02/24/2023] [Accepted: 02/28/2023] [Indexed: 03/31/2023]
Abstract
Beta-blockers are widely used in the treatment of hypertension, heart failure and ischemic heart disease. However, unstandardized medication results in diverse clinical outcomes in patients. The main causes are unattained optimal doses, insufficient follow-up and patients' poor adherence. To improve the medication inadequacy, our team developed a novel therapeutic vaccine targeting β1-adrenergic receptor (β1-AR). The β1-AR vaccine named ABRQβ-006 was prepared by chemical conjugation of a screened β1-AR peptide with Qβ virus like particle (VLP). The antihypertensive, anti-remodeling and cardio-protective effects of β1-AR vaccine were evaluated in different animal models. The ABRQβ-006 vaccine was immunogenic that induced high titers of antibodies against β1-AR epitope peptide. In the NG-nitro-L-arginine methyl ester (L-NAME) + Sprague Dawley (SD) hypertension model, ABRQβ-006 lowered systolic blood pressure about 10 mmHg and attenuated vascular remodeling, myocardial hypertrophy and perivascular fibrosis. In the pressure-overload transverse aortic constriction (TAC) model, ABRQβ-006 significantly improved cardiac function, decreased myocardial hypertrophy, perivascular fibrosis and vascular remodeling. In the myocardial infarction (MI) model, ABRQβ-006 effectively improved cardiac remodeling, reduced cardiac fibrosis and inflammatory infiltration, which was superior to metoprolol. Moreover, no significant immune-mediated damage was observed in immunized animals. The ABRQβ-006 vaccine targeting β1-AR showed the effects on hypertension and heart rate control, myocardial remodeling inhibition and cardiac function protection. These effects could be differentiated in different types of diseases with diverse pathogenesis. ABRQβ-006 could be a novel and promising method for the treatment of hypertension and heart failure with different etiologies.
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Impact of mirabegron versus solifenacin on autonomic function and arterial stiffness in female overactive bladder syndrome: a randomized controlled trial. Sci Rep 2022; 12:14219. [PMID: 35987885 PMCID: PMC9392788 DOI: 10.1038/s41598-022-18391-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Accepted: 08/10/2022] [Indexed: 11/17/2022] Open
Abstract
The study aims to elucidate the impact of mirabegron versus solifenacin on autonomic function and peripheral arterial conditions in women with overactive bladder syndrome (OAB). All consecutive women with OAB were randomized to receive 12 weeks of mirabegron 25 mg or solifenacin 5 mg once per day. Heart rate variability, cardio-ankle vascular index, ankle-brachial pressure index, blood pressure, and heart rate were compared between the two groups. There were 87 women (mirabegron, n = 43; and solifenacin, n = 44) who completed 12-week treatment and underwent heart rate variability examination. Systolic blood pressure (median: − 4.5 to − 5.5 mmHg) and diastolic blood pressure (median: − 0.5 to − 3.5 mmHg) decreased after solifenacin treatment, and heart rate (median: + 2 bpm) increased after mirabegron treatment, despite of no between-group difference. In addition, posttreatment heart rate variability, cardio-ankle vascular index, and ankle-brachial pressure index did not differ compared with baseline; and there were no between-group differences. In conclusion, solifenacin might decrease blood pressure, and mirabegron might increase heart rate. Nonetheless, there were no significant impacts of 12-week mirabegron versus solifenacin treatment on autonomic function and arterial stiffness.
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Characterization of Chicken α2A-Adrenoceptor: Molecular Cloning, Functional Analysis, and Its Involvement in Ovarian Follicular Development. Genes (Basel) 2022; 13:genes13071113. [PMID: 35885896 PMCID: PMC9315859 DOI: 10.3390/genes13071113] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 06/17/2022] [Accepted: 06/17/2022] [Indexed: 01/21/2023] Open
Abstract
Adrenoceptors are suggested to mediate the functions of norepinephrine (NE) and epinephrine (EPI) in the central nervous system (CNS) and peripheral tissues in vertebrates. Compared to mammals, the functionality and expression of adrenoceptors have not been well characterized in birds. Here, we reported the structure, expression, and functionality of chicken functional α2A-adrenoceptor, named ADRA2A. The cloned chicken ADRA2A cDNA is 1335 bp in length, encoding the receptor with 444 amino acids (a.a.), which shows high amino acid sequence identity (63.4%) with its corresponding ortholog in humans. Using cell-based luciferase reporter assays and Western blot, we demonstrated that the ADRA2A could be activated by both NE and EPI through multiple signaling pathways, including MAPK/ERK signaling cascade. In addition, the mRNA expression of ADRA2A is found to be expressed abundantly in adult chicken tissues including thyroid, lung, ovary and adipose from the reported RNA-Seq data sets. Moreover, the mRNA expression of ADRA2A is also found to be highly expressed in the granulosa cells of 6–8 mm and F5 chicken ovarian follicles, which thus supports that ADRA2A signaling may play a role in ovarian follicular growth and differentiation. Taken together, our data provide the first proof that the α2A-adrenoceptor is functional in birds involving avian ovarian follicular development.
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Zefirov TL, Ziyatdinova NI, Kuptsova AM, Zefirov AL. Effect of Clonidine Hydrochloride on Isolated Newborn Rat Heart. Bull Exp Biol Med 2021; 172:121-124. [PMID: 34855077 DOI: 10.1007/s10517-021-05347-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Indexed: 11/26/2022]
Abstract
The concentration dependenies of the chronotropic response and changes in blood supply to the isolated heart of 7-day-old newborn rats induced by application of α2-adrenergic receptor agonist clonidine hydrochloride in concentrations of 10-9-10-6 M were revealed. The minimum concentration of α2-adrenergic receptor agonist caused tachycardia, while higher concentrations led to bradycardia. The maximum effect manifesting in a decrease in coronary flow was recorded at the minimum concentration of the agonist, while the highest concentration had no effect on the coronary flow. When comparing these results with those obtained in control adult rats, we found that the most pronounced differences in the chronotropic effects were observed after addition of the minimum concentration of the α2-adrenergic receptor agonist: bradycardia in adult rats and tachycardia in newborns. The maximum differences in coronary flow parameters were observed after addition of α2-adrenergic receptor agonist in the maximum concentration that induced a two-phase response in adult rats and had no effect on the blood supply in newborns.
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Affiliation(s)
- T L Zefirov
- Department of Human Health Protection, Kazan (Volga region) Federal University, Kazan, Republic of Tatarstan, Russia.
| | - N I Ziyatdinova
- Department of Human Health Protection, Kazan (Volga region) Federal University, Kazan, Republic of Tatarstan, Russia
| | - A M Kuptsova
- Department of Human Health Protection, Kazan (Volga region) Federal University, Kazan, Republic of Tatarstan, Russia
| | - A L Zefirov
- Department of Normal Physiology, Kazan State Medical University, Ministry of the Health of the Russian Federation, Kazan, Republic of Tatarstan, Russia
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Boulet LM, Atwater TL, Brown CV, Shafer BM, Vermeulen TD, Cotton PC, Day TA, Foster GE. Sex differences in the coronary vascular response to combined chemoreflex and metaboreflex stimulation in healthy humans. Exp Physiol 2021; 107:16-28. [PMID: 34788486 DOI: 10.1113/ep090034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Accepted: 11/08/2021] [Indexed: 12/18/2022]
Abstract
NEW FINDINGS What is the central question of this study? Coronary blood flow in healthy humans is controlled by both local metabolic signalling and adrenergic activity: does the integration of these signals during acute hypoxia and adrenergic activation differ between sexes? What are the main findings and its importance? Both males and females exhibit an increase in coronary blood velocity in response to acute hypoxia, a response that is constrained by adrenergic stimulation in males but not females. These findings suggest that coronary blood flow control differs between males and females. ABSTRACT Coronary hyperaemia is mediated through multiple signalling pathways, including local metabolic messengers and adrenergic stimulation. This study aimed to determine whether the coronary vascular response to adrenergic stressors is different between sexes in normoxia and hypoxia. Young, healthy participants (n = 32; 16F) underwent three randomized trials of isometric handgrip exercise followed by post-exercise circulatory occlusion (PECO) to activate the muscle metaboreflex. End-tidal P O 2 was controlled at (1) normoxic levels throughout the trial, (2) 50 mmHg for the duration of the trial (hypoxia trial), or (3) 50 mmHg only during PECO (mixed trial). Mean left anterior descending coronary artery velocity (LADVmean ; transthoracic Doppler echocardiography), heart rate and blood pressure were assessed at baseline and during PECO. In normoxia, there was no change in LADVmean or cardiac workload induced by PECO in males and females. Acute hypoxia increased baseline LADVmean to a greater extent in males compared with females (P < 0.05), despite a similar increase in cardiac workload. The change in LADVmean induced by PECO was similar between sexes in normoxia (P = 0.31), greater in males during the mixed trial (male: 12.8 (7.7) cm/s vs. female: 8.1 (6.3) cm/s; P = 0.02) and reduced in males but not females in acute hypoxia (male: -4.8 (4.5) cm/s vs. female: 0.8 (6.2) cm/s; P = 0.006). In summary, sex differences in the coronary vasodilatory response to hypoxia were observed, and metaboreflex activation during hypoxia caused a paradoxical reduction in coronary blood velocity in males but not females.
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Affiliation(s)
- Lindsey M Boulet
- Centre for Heart, Lung, and Vascular Health, School of Health and Exercise Sciences, University of British Columbia, British Columbia, Kelowna, Canada
| | - Taylor L Atwater
- Centre for Heart, Lung, and Vascular Health, School of Health and Exercise Sciences, University of British Columbia, British Columbia, Kelowna, Canada
| | - Courtney V Brown
- Centre for Heart, Lung, and Vascular Health, School of Health and Exercise Sciences, University of British Columbia, British Columbia, Kelowna, Canada
| | - Brooke M Shafer
- Centre for Heart, Lung, and Vascular Health, School of Health and Exercise Sciences, University of British Columbia, British Columbia, Kelowna, Canada
| | - Tyler D Vermeulen
- Centre for Heart, Lung, and Vascular Health, School of Health and Exercise Sciences, University of British Columbia, British Columbia, Kelowna, Canada
| | - Paul C Cotton
- Centre for Heart, Lung, and Vascular Health, School of Health and Exercise Sciences, University of British Columbia, British Columbia, Kelowna, Canada
| | - Trevor A Day
- Department of Biology, Faculty of Science and Technology, Mount Royal University, Calgary, Alberta, Canada
| | - Glen E Foster
- Centre for Heart, Lung, and Vascular Health, School of Health and Exercise Sciences, University of British Columbia, British Columbia, Kelowna, Canada
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A new perspective on cardiovascular drift during prolonged exercise. Life Sci 2021; 287:120109. [PMID: 34717912 DOI: 10.1016/j.lfs.2021.120109] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 10/18/2021] [Accepted: 10/25/2021] [Indexed: 11/21/2022]
Abstract
Prolonged exercise induces cardiovascular drift, which is characterized by decreasing mean arterial pressure (MAP), stroke volume and heart rate increase. Cardiovascular drift has been debated for a long time. Although the exact mechanisms underlying cardiovascular drift are still unknown, two theories have been proposed. The first is that increased skin blood flow displaces blood volume from central circulation to the periphery, which reduces stroke volume. According to this theory, the rise in heart rate is presumably responding to the drop in stroke volume and MAP. The alternative theory is that an increase in heart rate is due to an increase in sympathetic nervous activity causing reducing time at diastole, and therefore stroke volume. It may be difficult to determine a single robust factor accounting for cardiovascular drift, due to the broad range of circumstances. The primary focus of this review is to elucidate our understanding of cardiovascular drift during prolonged exercise through nitric oxide and force-frequency relationship. We highlight for the very first time that cardiovascular drift (in some conditions and within a specific time period) may be considered as a protective strategy against potential damage that could be induced by the intense and prolonged contraction of the myocardium.
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Birnbaumer P, Traninger H, Sattler MC, Borenich A, Hofmann P. Pattern of the Heart Rate Performance Curve in Subjects with Beta-Blocker Treatment and Healthy Controls. J Funct Morphol Kinesiol 2021; 6:jfmk6030061. [PMID: 34287331 PMCID: PMC8293437 DOI: 10.3390/jfmk6030061] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 07/08/2021] [Accepted: 07/11/2021] [Indexed: 11/16/2022] Open
Abstract
(1): Heart rate performance curve (HRPC) in incremental exercise was shown to be not uniform, causing false intensity estimation applying percentages of maximal heart rate (HRmax). HRPC variations are mediated by β-adrenergic receptor sensitivity. The aim was to study age and sex dependent differences in HRPC patterns in adults with β-blocker treatment (BB) and healthy controls (C). (2): A total of 535 (102 female) BB individuals were matched 1:1 for age and sex (male 59 ± 11 yrs, female 61 ± 11 yrs) in C. From the maximum incremental cycle ergometer exercise a first and second heart rate (HR) threshold (Th1 and Th2) was determined. Based on the degree of the deflection (kHR), HRPCs were categorized as regular (downward deflection (kHR > 0.1)) and non-regular (upward deflection (kHR < 0.1), linear time course). (3): Logistic regression analysis revealed a higher odds ratio to present a non-regular curve in BB compared to C (females showed three times higher odds). The odds for non-regular HRPC in BB versus C decreased with older age (OR interaction = 0.97, CI = 0.94-0.99). Maximal and submaximal performance and HR variables were significantly lower in BB (p < 0.05). %HRmax was significantly lower in BB versus C at Th2 (male: 77.2 ± 7.3% vs. 80.8 ± 5.0%; female: 79.2 ± 5.1% vs. 84.0 ± 4.3%). %Pmax at Th2 was similar in BB and C. (4): The HRPC pattern in incremental cycle ergometer exercise is different in individuals receiving β-blocker treatment compared to healthy individuals. The effects were also dependent on age and sex. Relative HR values at Th2 varied substantially depending on treatment. Thus, the percentage of Pmax seems to be a stable and independent indicator for exercise intensity prescription.
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Affiliation(s)
- Philipp Birnbaumer
- Institute of Human Movement Science, Sport & Health, University of Graz, 8010 Graz, Austria; (P.B.); (M.C.S.)
| | - Heimo Traninger
- ZARG Centre for Outpatient Rehabilitation, 8021 Graz, Austria;
| | - Matteo C. Sattler
- Institute of Human Movement Science, Sport & Health, University of Graz, 8010 Graz, Austria; (P.B.); (M.C.S.)
| | - Andrea Borenich
- Department of Production and Operations Management, University of Graz, 8010 Graz, Austria;
| | - Peter Hofmann
- Institute of Human Movement Science, Sport & Health, University of Graz, 8010 Graz, Austria; (P.B.); (M.C.S.)
- Correspondence: ; Tel.: +43-316-380-3903
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Peter AK, Walker CJ, Ceccato T, Trexler CL, Ozeroff CD, Lugo KR, Perry AR, Anseth KS, Leinwand LA. Cardiac Fibroblasts Mediate a Sexually Dimorphic Fibrotic Response to β-Adrenergic Stimulation. J Am Heart Assoc 2021; 10:e018876. [PMID: 33998248 PMCID: PMC8483546 DOI: 10.1161/jaha.120.018876] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Background Biological sex is an important modifier of cardiovascular disease and women generally have better outcomes compared with men. However, the contribution of cardiac fibroblasts (CFs) to this sexual dimorphism is relatively unexplored. Methods and Results Isoproterenol (ISO) was administered to rats as a model for chronic β‐adrenergic receptor (β‐AR)‐mediated cardiovascular disease. ISO‐treated males had higher mortality than females and also developed fibrosis whereas females did not. Gonadectomy did not abrogate this sex difference. To determine the cellular contribution to this phenotype, CFs were studied. CFs from both sexes had increased proliferation in vivo in response to ISO, but CFs from female hearts proliferated more than male cells. In addition, male CFs were significantly more activated to myofibroblasts by ISO. To investigate potential regulatory mechanisms for the sexually dimorphic fibrotic response, β‐AR mRNA and PKA (protein kinase A) activity were measured. In response to ISO treatment, male CFs increased expression of β1‐ and β2‐ARs, whereas expression of both receptors decreased in female CFs. Moreover, ISO‐treated male CFs had higher PKA activity relative to vehicle controls, whereas ISO did not activate PKA in female CFs. Conclusions Chronic in vivo β‐AR stimulation causes fibrosis in male but not female rat hearts. Male CFs are more activated than female CFs, consistent with elevated fibrosis in male rat hearts and may be caused by higher β‐AR expression and PKA activation in male CFs. Taken together, our data suggest that CFs play a substantial role in mediating sex differences observed after cardiac injury.
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Affiliation(s)
- Angela K Peter
- BioFrontiers Institute University of Colorado Boulder CO.,Department of Molecular, Cellular and Developmental Biology University of Colorado Boulder CO
| | - Cierra J Walker
- BioFrontiers Institute University of Colorado Boulder CO.,Materials Science and Engineering Program University of Colorado Boulder Boulder CO
| | - Tova Ceccato
- BioFrontiers Institute University of Colorado Boulder CO.,Department of Molecular, Cellular and Developmental Biology University of Colorado Boulder CO
| | - Christa L Trexler
- BioFrontiers Institute University of Colorado Boulder CO.,Department of Molecular, Cellular and Developmental Biology University of Colorado Boulder CO
| | - Christopher D Ozeroff
- BioFrontiers Institute University of Colorado Boulder CO.,Department of Molecular, Cellular and Developmental Biology University of Colorado Boulder CO
| | | | - Amy R Perry
- BioFrontiers Institute University of Colorado Boulder CO
| | - Kristi S Anseth
- BioFrontiers Institute University of Colorado Boulder CO.,Department of Chemical and Biological Engineering University of Colorado Boulder CO
| | - Leslie A Leinwand
- BioFrontiers Institute University of Colorado Boulder CO.,Department of Molecular, Cellular and Developmental Biology University of Colorado Boulder CO
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11
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Spinelli L, Imbriaco M, Giugliano G, Nappi C, Gaudieri V, Riccio E, Pisani A, Trimarco B, Cuocolo A. Focal reduction in left ventricular 123I-metaiodobenzylguanidine uptake and impairment in systolic function in patients with Anderson-Fabry disease. J Nucl Cardiol 2021; 28:641-649. [PMID: 31087266 DOI: 10.1007/s12350-019-01734-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Revised: 03/21/2019] [Accepted: 04/15/2019] [Indexed: 11/24/2022]
Abstract
BACKGROUND Abnormalities of cardiac sympathetic innervation have been demonstrated in Anderson-Fabry disease (AFD). We aimed to investigate the relationship between regional left ventricular (LV) denervation and regional function abnormalities. METHODS Twenty-four AFD patients (43.7 ± 12.8 years) were studied by 123I-metaiodobenzylguanidine (MIBG) cardiac imaging and speckle-tracking echocardiography. Segmental tracer uptake was estimated according to 0 to 4 score, and total defect score (TDS) was calculated for each patient. RESULTS Segmental longitudinal strain worsened as MIBG uptake score increased (P < 0.001). By ROC analysis, a segmental longitudinal strain > - 16.2% predicted a segmental MIBG uptake score ≥1, with 79.7% sensitivity and 65.3% specificity. Segmental MIBG uptake defects were found in 13 out 24 AFD patients. LV mass index (60.8 ± 10.1 vs. 41.4 ± 9.8 g/h2.7), relative wall thickness (0.51 ± 0.06 vs. 0.40 ± 0.06), systolic pulmonary artery pressure (35.2 ± 6.7 vs. 27.2 ± 4.2 mmHg), and longitudinal strain (- 14.3 ± 2.7 vs. -19.4 ± 1.8%) were significantly higher in patients with segmental defect (all P < 0.01). At multivariate linear regression analysis, global longitudinal strain was independently associated with TDS (B = 3.007, 95% confidence interval 1.384 to 4.630, P = 0.001). CONCLUSIONS Reduced cardiac MIBG uptake reflects the severity of cardiac involvement in AFD patients. LV longitudinal function impairment seems to be an earlier disease feature than regional myocardial denervation.
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Affiliation(s)
- Letizia Spinelli
- Department of Advanced Biomedical Sciences, Federico II University of Naples, Via Pansini, 5, 80131, Naples, Italy.
| | - Massimo Imbriaco
- Department of Advanced Biomedical Sciences, Federico II University of Naples, Via Pansini, 5, 80131, Naples, Italy
| | - Giuseppe Giugliano
- Department of Advanced Biomedical Sciences, Federico II University of Naples, Via Pansini, 5, 80131, Naples, Italy
| | - Carmela Nappi
- Department of Advanced Biomedical Sciences, Federico II University of Naples, Via Pansini, 5, 80131, Naples, Italy
| | - Valeria Gaudieri
- Department of Advanced Biomedical Sciences, Federico II University of Naples, Via Pansini, 5, 80131, Naples, Italy
| | - Eleonora Riccio
- Department of Public Health, Nephrology Unit, Federico II University of Naples, Via Pansini, 5, 80131, Naples, Italy
| | - Antonio Pisani
- Department of Public Health, Nephrology Unit, Federico II University of Naples, Via Pansini, 5, 80131, Naples, Italy
| | - Bruno Trimarco
- Department of Advanced Biomedical Sciences, Federico II University of Naples, Via Pansini, 5, 80131, Naples, Italy
| | - Alberto Cuocolo
- Department of Advanced Biomedical Sciences, Federico II University of Naples, Via Pansini, 5, 80131, Naples, Italy
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12
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Cojocariu SA, Maștaleru A, Sascău RA, Stătescu C, Mitu F, Leon-Constantin MM. Neuropsychiatric Consequences of Lipophilic Beta-Blockers. ACTA ACUST UNITED AC 2021; 57:medicina57020155. [PMID: 33572109 PMCID: PMC7914867 DOI: 10.3390/medicina57020155] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 02/04/2021] [Accepted: 02/06/2021] [Indexed: 12/21/2022]
Abstract
Beta-blockers are a class of drugs with important benefits in cardiovascular pathology. In this paper, we aim to highlight their adverse and therapeutic effects in the neuropsychiatric field. With respect to permeability, we would like to mention that most beta-blockers are lipophilic and can cross the blood–brain barrier. Observational studies show the presence of neuropsychiatric side effects when taking beta-blockers, and is the reason for which caution is recommended in their use in patients with depressive syndrome. From a therapeutic point of view, most current evidence is for the use of beta-blockers in migraine attacks, essential tremor, and akathisia. Beta-blockers appear to be effective in the treatment of aggressive behavior, beneficial in the prevention of posttraumatic stress syndrome and may play a role in the adjuvant treatment of obsessive–compulsive disorder, which is refractory to standard therapy. In conclusion, the relationship between beta-blockers and the central nervous system appears as a two-sided coin. Summarizing the neuropsychiatric side effects of beta-blockers, we suggest that clinicians pay special attention to the pharmacological properties of different beta-blockers.
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Affiliation(s)
- Sabina Alexandra Cojocariu
- Department of Medical Specialties (I), Faculty of Medicine, “Grigore T Popa” University of Medicine and Pharmacy, University Street nr 16, 700115 Iasi, Romania; (S.A.C.); (R.A.S.); (C.S.); (F.M.); (M.M.L.-C.)
| | - Alexandra Maștaleru
- Department of Medical Specialties (I), Faculty of Medicine, “Grigore T Popa” University of Medicine and Pharmacy, University Street nr 16, 700115 Iasi, Romania; (S.A.C.); (R.A.S.); (C.S.); (F.M.); (M.M.L.-C.)
- Clinical Rehabilitation Hospital–Cardiovascular Rehabilitation Clinic, Pantelimon Halipa Street nr 14, 700661 Iasi, Romania
- Correspondence:
| | - Radu Andy Sascău
- Department of Medical Specialties (I), Faculty of Medicine, “Grigore T Popa” University of Medicine and Pharmacy, University Street nr 16, 700115 Iasi, Romania; (S.A.C.); (R.A.S.); (C.S.); (F.M.); (M.M.L.-C.)
- Institute of Cardiovascular Disease “Prof. Dr. George. I.M. Georgescu”, Carol I Boulevard nr 50, 700503 Iasi, Romania
| | - Cristian Stătescu
- Department of Medical Specialties (I), Faculty of Medicine, “Grigore T Popa” University of Medicine and Pharmacy, University Street nr 16, 700115 Iasi, Romania; (S.A.C.); (R.A.S.); (C.S.); (F.M.); (M.M.L.-C.)
- Institute of Cardiovascular Disease “Prof. Dr. George. I.M. Georgescu”, Carol I Boulevard nr 50, 700503 Iasi, Romania
| | - Florin Mitu
- Department of Medical Specialties (I), Faculty of Medicine, “Grigore T Popa” University of Medicine and Pharmacy, University Street nr 16, 700115 Iasi, Romania; (S.A.C.); (R.A.S.); (C.S.); (F.M.); (M.M.L.-C.)
- Clinical Rehabilitation Hospital–Cardiovascular Rehabilitation Clinic, Pantelimon Halipa Street nr 14, 700661 Iasi, Romania
| | - Maria Magdalena Leon-Constantin
- Department of Medical Specialties (I), Faculty of Medicine, “Grigore T Popa” University of Medicine and Pharmacy, University Street nr 16, 700115 Iasi, Romania; (S.A.C.); (R.A.S.); (C.S.); (F.M.); (M.M.L.-C.)
- Clinical Rehabilitation Hospital–Cardiovascular Rehabilitation Clinic, Pantelimon Halipa Street nr 14, 700661 Iasi, Romania
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Post-weaning protein malnutrition induces myocardial dysfunction associated with oxidative stress and altered calcium handling proteins in adult rats. J Physiol Biochem 2021; 77:261-272. [PMID: 33555533 DOI: 10.1007/s13105-021-00792-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 01/22/2021] [Indexed: 10/22/2022]
Abstract
Hypercaloric low-protein diet may lead to a state of malnutrition found in the low-income population of Northeastern Brazil. Although malnutrition during critical periods in the early life is associated with cardiovascular diseases in adulthood, the mechanisms of cardiac dysfunction are still unclear. Here we studied the effects of post-weaning malnutrition due to low protein intake induced by a regional basic diet on the cardiac contractility of young adult rats. In vivo arterial hemodynamic and in vitro myocardial contractility were evaluated in 3-month-old rats. Additionally, protein content of the sarcoplasmic reticulum Ca(2+)-ATPase (SERCA), total phospholamban (PLB) and phosphorylated at serine 16 (p-Ser(16)-PLB), α2-subunit of the Na(+)/K(+)-ATPase (α2-NKA), and Na(+)/Ca(2+) exchanger (NXC) and in situ production of superoxide anion (O2(-)) were measured in the heart. Blood pressure and heart rate increased in the post-weaning malnourished (PWM) rats. Moreover, malnutrition decreased twitch force and inotropic responses of the isolated cardiac muscle. Protein expression of SERCA, PLB/SERCA, and p-Ser(16)-PLB/PLB ratios and α2-NKA were decreased without changing NCX. The contraction dependent on transsarcolemmal calcium influx was unchanged but responsiveness to Ca(2+) and tetanic peak contractions were impaired in the PWM group. Myocardial O2(-) production was significantly increased by PWM. Our data demonstrated that this hypercaloric low-protein diet in rats is associated with myocardial dysfunction, altered expression of major calcium handling proteins, and increased local oxidative stress. These findings reinforce the attention needed for pediatric care, since chronic malnutrition in early life is related to increased cardiovascular risk in adulthood. Graphical Abstract.
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Nisimura LM, Bousquet P, Muccillo F, Tibirica E, Garzoni LR. Tyrosine hydroxylase and β2-adrenergic receptor expression in leukocytes of spontaneously hypertensive rats: putative peripheral markers of central sympathetic activity. ACTA ACUST UNITED AC 2020; 53:e9615. [PMID: 33146287 PMCID: PMC7643929 DOI: 10.1590/1414-431x20209615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Accepted: 08/27/2020] [Indexed: 11/21/2022]
Abstract
The sympathetic nervous system (SNS) plays a fundamental role in the pathophysiology of cardiovascular diseases, including primary arterial hypertension. In this study, we aimed to investigate whether the expression of the rate-limiting enzyme in catecholamine synthesis, tyrosine hydroxylase (TH), and the β2-adrenergic receptor (β2-AR) in immune cells from peripheral blood, reflect central SNS activity in spontaneously hypertensive rats (SHR). TH expression in the lower brainstem and adrenal glands and β2-AR expression in the lower brainstem were analyzed by western blot analyses. In the leukocytes, TH and β2-AR expression was evaluated by flow cytometry before and after chronic treatment with the centrally-acting sympathoinhibitory drug clonidine. Western blot analyses showed increased TH and β2-AR expression in the lower brainstem and increased TH in adrenal glands from SHR compared to normotensive Wistar Kyoto rats (WKY). Lower brainstem from SHR treated with clonidine presented reduced TH and β2-AR levels, and adrenal glands had decreased TH expression compared to SHR treated with vehicle. Flow cytometry showed that the percentage of leukocytes that express β2-AR is higher in SHR than in WKY. However, the percentage of leukocytes that expressed TH was higher in WKY than in SHR. Moreover, chronic treatment with clonidine normalized the levels of TH and β2-AR in leukocytes from SHR to similar levels of those of WKY. Our study demonstrated that the percentage of leukocytes expressing TH and β2-AR was altered in arterial hypertension and can be modulated by central sympathetic inhibition with clonidine treatment.
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Affiliation(s)
- L M Nisimura
- Laboratório de Inovações em Terapias, Ensino e Bioprodutos, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brasil.,Laboratório de Investigação Cardiovascular, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brasil
| | - P Bousquet
- Department of Pharmacology, Faculty of Medicine, University of Strasbourg, Strasbourg, France
| | - F Muccillo
- Instituto Nacional de Cardiologia, Ministério da Saúde, Rio de Janeiro, RJ, Brasil
| | - E Tibirica
- Laboratório de Investigação Cardiovascular, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brasil.,Instituto Nacional de Cardiologia, Ministério da Saúde, Rio de Janeiro, RJ, Brasil
| | - L R Garzoni
- Laboratório de Inovações em Terapias, Ensino e Bioprodutos, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brasil
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Hamedi A, Sakhteman A, Moheimani SM. An In Silico Approach Towards Investigation of Possible Effects of Essential Oils Constituents on Receptors Involved in Cardiovascular Diseases (CVD) and Associated Risk Factors (Diabetes Mellitus and Hyperlipidemia). Cardiovasc Hematol Agents Med Chem 2020; 19:32-42. [PMID: 32386501 DOI: 10.2174/1871524920666200510013039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2019] [Revised: 03/17/2020] [Accepted: 04/02/2020] [Indexed: 11/22/2022]
Abstract
AIM Aromatherapy products, hydrosol beverages and distillates containing essential oils are widely used for cardiovascular conditions. Investigation of the possible activity of their major constituents with the cardiovascular-related receptors may lead to developing new therapeutics. It also may prevent unwanted side effects and drug-herb interactions. MATERIALS AND METHODS A list of 243 volatile molecules (mainly monoterpene and sesquiterpene) was prepared from a literature survey in Scopus and PubMed (2000-2019) on hydrosols and essential oils which are used for Cardiovascular Diseases (CVD) and its risk factors (diabetes mellitus and hyperlipidemia). The PDB files of the receptors (229 native PDB files) included alpha-glucosidase, angiotensin- converting enzymes, beta-2 adrenergic receptor, glucocorticoid, HMG-CoA reductase, insulin, mineralocorticoid, potassium channel receptors and peroxisome proliferator-activated receptoralpha, were downloaded from Protein Data Bank. An in silico study using AutoDock 4.2 and Vina in parallel mode was performed to investigate possible interaction of the molecules with the receptors. Drug likeliness of the most active molecules was investigated using DruLiTo software. RESULTS Spathulenol, bisabolol oxide A, bisabolone oxide, bergapten, bergamotene, dill apiole, pcymene, methyl jasmonate, pinocarveol, intermedeol, α-muurolol, S-camphor, ficusin, selinen-4-ol, iso-dihydrocarveol acetate, 3-thujanone, linanool oxide and cadinol isomers made a better interaction with some of the named receptors. All of the named molecules had an acceptable dug likeliness except for α-bergamotene. In addition, all of the named molecules had the ability to pass the bloodbrain barrier and it is possible to produce unwanted side effects. CONCLUSION Some ingredients of essential oils might be active on cardiovascular-related receptors.
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Affiliation(s)
- Azadeh Hamedi
- Department of Pharmacognosy, Medicinal Plants Processing Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Amirhossein Sakhteman
- Department of Medicinal Chemistry, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran
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Cobos-Puc L, Urbina-Ruiz P, Pacheco-Rosado J, Aguayo-Morales H, Sánchez-López A, Centurión D. Cardiovascular Responses to 5-hydroxytryptamine in Methimazole-induced Hypothyroid Pithed Rats. Arch Med Res 2020; 51:310-316. [PMID: 32284200 DOI: 10.1016/j.arcmed.2020.03.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2019] [Revised: 12/31/2019] [Accepted: 03/30/2020] [Indexed: 10/24/2022]
Abstract
BACKGROUND Patients suffering from hypothyroidism tend to develop diastolic hypertension. 5-Hydroxytryptamine (5-HT) is an amine that contributes to the maintenance of the blood pressure through central and peripheral 5-HT receptors. Curiously, the hypothyroidism alters the density of the 5-HT receptors in rodent brains. AIM OF THE STUDY Analyze the effect of the methimazole-induced hypothyroidism on the peripheral cardiovascular responses elicited by 5-HT. METHODS The vasopressor and tachycardic responses to 5-HT (3-300 μg/kg), and the vasodepressor responses to 5-HT, 5-carboxamidotryptamine (5-CT, 0.001-0.1 μg/kg), isoprenaline (0.03-1 μg/kg) and acetylcholine (ACh, 0.03-3 μg/kg), during an infusion of methoxamine, were determined in pithed hypothyroid rats. RESULTS The tachycardic and vasopressor responses to 5-HT and the vasodepressor responses to 5-CT and ACh remained unaffected, the vasodepressor response to 5-HT reduced, and the vasodepressor response to isoprenaline enhanced and reduced at the lowest and highest dose, respectively. CONCLUSION These results suggest that hypothyroidism impairs the vasodepressor response to 5-HT, which could contribute to hypothyroidism-induced hypertension.
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Affiliation(s)
- Luis Cobos-Puc
- Departamento de Farmacobiología, Centro de Investigación y de Estudios Avanzados del IPN, Ciudad de México, México; Departamento de Biotecnología, Facultad de Ciencias Químicas, Universidad Autónoma de Coahuila, Coahuila, México
| | - Pablo Urbina-Ruiz
- Departamento de Farmacobiología, Centro de Investigación y de Estudios Avanzados del IPN, Ciudad de México, México; Departamento de Fisiología, Escuela Nacional de Ciencias Biológicas del Instituto Politécnico Nacional, Unidad Profesional Adolfo López Mateos, Mexico
| | - Jorge Pacheco-Rosado
- Departamento de Fisiología, Escuela Nacional de Ciencias Biológicas del Instituto Politécnico Nacional, Unidad Profesional Adolfo López Mateos, Mexico
| | - Hilda Aguayo-Morales
- Departamento de Farmacobiología, Centro de Investigación y de Estudios Avanzados del IPN, Ciudad de México, México; Departamento de Biotecnología, Facultad de Ciencias Químicas, Universidad Autónoma de Coahuila, Coahuila, México
| | - Araceli Sánchez-López
- Departamento de Farmacobiología, Centro de Investigación y de Estudios Avanzados del IPN, Ciudad de México, México
| | - David Centurión
- Departamento de Farmacobiología, Centro de Investigación y de Estudios Avanzados del IPN, Ciudad de México, México.
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Fumagalli C, Maurizi N, Marchionni N, Fornasari D. β-blockers: Their new life from hypertension to cancer and migraine. Pharmacol Res 2019; 151:104587. [PMID: 31809852 DOI: 10.1016/j.phrs.2019.104587] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Revised: 12/02/2019] [Accepted: 12/02/2019] [Indexed: 12/28/2022]
Abstract
The pharmacological class of β-blockers includes a plea of molecules with largely different pharmacokinetic and pharmacodynamic characteristics with a protective effect that may span far beyond the cardiovascular system. Although all these compounds share the pharmacological blockade of the adrenergic receptors, each of them is characterized by specific pharmacological properties, including selectivity of action depending on the adrenergic receptors subtypes, intrinsic sympathomimetic activity (ISA), lipid solubility, pharmacokinetic profile, and also other ancillary properties that impact their clinical effect. Their use in the treatment of hypertension has been extensively debated and at the moment a class indication is not present. However, in specific niche of patients, such as in those young individuals in which hypertension is mainly driven by a sympathetic hyperactivation, strong evidence pose β-Blockers as a highly reasonable first-line treatment. Lipophilic β-blockers, specifically propranolol and metoprolol, can cross the Blood Brain Barrier and have a Class A indication for the prophylactic treatment of migraine attacks. Moreover, since β-adrenergic receptors affect the proliferative process of both cancer and immune cells, their blockade has been associated with metastasis reduction in several epithelial and solid organ tumors posing β-Blockers as a new attractive, inexpensive and relatively safe therapeutic strategy in patients with several types of cancer. However, further dedicated prospective, randomized, placebo-controlled studies are needed to determine the real efficacy of these compounds.
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Affiliation(s)
- Carlo Fumagalli
- Cardiothoracovascular Department, Azienda Ospedaliero-Universitaria Careggi, University of Florence, Italy
| | - Niccolò Maurizi
- Cardiothoracovascular Department, Azienda Ospedaliero-Universitaria Careggi, University of Florence, Italy; Hopital du Valais, Department of Internal Medicine, Sion, Switzerland.
| | - Niccolò Marchionni
- Cardiothoracovascular Department, Azienda Ospedaliero-Universitaria Careggi, University of Florence, Italy
| | - Diego Fornasari
- Department of Medical Biotechnology and Translational Medicine, Università degli Studi di Milano, Italy
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Abstract
Objective: Omentin is a recently identified novel adipocytokine mainly expressed in the epicardial adipose tissue. Although it has favorable effects on cardiovascular disease, the impact of omentin on the hearts is still an understudied issue. The aim of the present study was to investigate the possible effects of omentin on isolated rat heart. Methods: Using the Langendorff method, 28 adult male Sprague–Dawley rat hearts were isolated and perfused with modified Krebs–Henseleit solution (mK–Hs). Concentrations of 100, 200, and 400 ng/mL omentin were given to the hearts for 30 min. The control group (n=7) was perfused with mK–Hs alone. Gene expressions in the left ventricle tissue were determined by real-time polymerase chain reaction. Left ventricular cyclic adenosine monophosphate and cyclic guanosine monophosphate (cGMP) concentrations were determined by using enzyme-linked immunosorbent assay. Results: All concentrations of omentin significantly decreased left ventricular developed pressure and maximal rate of pressure development that are the indexes of cardiac contractility. At the same time, omentin decreased both phosphoinositide 3-kinase γ (PI3Kγ) and sarcolemmal L-type Ca2+ channel (CaV1.2) mRNA levels. Moreover, this peptide at concentrations of 200 and 400 ng/mL increased endothelial nitric oxide synthase (eNOS) mRNA. Furthermore, concentrations of 200 and 400 ng/mL omentin increased the amount of cGMP. Conclusion: We conclude that acute omentin treatment decreases cardiac contractility. Elevated eNOS mRNA and cGMP levels with reduced CaV1.2 mRNA are likely to lead to negative inotropy.
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Studying β 1 and β 2 adrenergic receptor signals in cardiac cells using FRET-based sensors. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2019; 154:30-38. [PMID: 31266653 DOI: 10.1016/j.pbiomolbio.2019.06.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 06/10/2019] [Accepted: 06/17/2019] [Indexed: 12/17/2022]
Abstract
Cyclic 3'-5' adenosine monophosphate (cAMP) is a key modulator of cardiac function. Thanks to the sophisticated organization of its pathway in distinct functional units called microdomains, cAMP is involved in the regulation of both inotropy and chronotropy as well as transcription and cardiac death. While visualization of cAMP microdomains can be achieved thanks to cAMP-sensitive FRET-based sensors, the molecular mechanisms through which cAMP-generating stimuli are coupled to distinct functional outcomes are not well understood. One possibility is that each stimulus activates multiple microdomains in order to generate a spatiotemporal code that translates into function. To test this hypothesis here we propose a series of experimental protocols that allow to simultaneously follow cAMP or Protein Kinase A (PKA)-dependent phosphorylation in different subcellular compartments of living cells. We investigate the responses of β Adrenergic receptors (β1AR and β2AR) challenged with selective drugs that enabled us to measure the actions of each receptor independently. At the whole cell level, we used a combination of co-culture with selective βAR stimulation and were able to molecularly separate cardiac fibroblasts from neonatal rat ventricular myocytes based on their cAMP responses. On the other hand, at the subcellular level, these experimental protocols allowed us to dissect the relative weight of β1 and β2 adrenergic receptors on cAMP signalling at the cytosol and outer mitochondrial membrane of NRVMs. We propose that experimental procedures that allow the collection of multiparametric data are necessary in order to understand the molecular mechanisms underlying the coupling between extracellular signals and cellular responses.
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Effects of renal denervation on blood-pressure response to hemorrhagic shock in spontaneously hypertensive rats. Chin J Traumatol 2018; 21:293-300. [PMID: 30342984 PMCID: PMC6235792 DOI: 10.1016/j.cjtee.2018.09.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Revised: 03/31/2018] [Accepted: 04/19/2018] [Indexed: 02/04/2023] Open
Abstract
PURPOSE Renal denervation (RD) has been demonstrated to be an effective approach to reduce blood pressure for those with resistant hypertension. Yet, we aimed to explore the effect and possible mechanism of RD on blood-pressure response to hemorrhagic shock in spontaneously hypertensive rats. METHODS A total of 48 male spontaneously hypertensive rats were randomized to three groups: study group, sham-operation group and control group. RD was achieved by cutting off renal nerves and swabbing phenol on it. Ten weeks after RD, 8 rats in each group were sacrificed to collect the kidney and heart tissues. The remaining rats were subjected to an operation to induce hemorrhagic shock which would lead to 40% loss of total blood volume, and observed for 120 min. The serum concentration of norepinephrine was measured before and three weeks after RD. RESULTS The blood-pressure and norepinephrine levels were reduced significantly after RD (p < 0.05). Systolic blood pressure and diastolic blood pressure of the surgery group were higher than those in the sham and control groups at 15, 30 and 45 min after hemorrhagic shock (p < 0.05), while no significant difference was observed at 60, 90 and 120 min (p > 0.05). Additionally, the beta-1 adrenergic receptor (β1-AR) in the study group was significantly higher than those in the other two groups (p < 0.05) after hemorrhagic shock. CONCLUSION This study demonstrated that RD could to some extent improve blood-pressure response to hemorrhagic shock in an established model of severe hemorrhagic shock in spontaneously hypertensive rats. The mechanism might be associated with up-regulation of β1-AR.
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Vermeulen TD, Boulet LM, Stembridge M, Williams AM, Anholm JD, Subedi P, Gasho C, Ainslie PN, Feigl EO, Foster GE. Influence of myocardial oxygen demand on the coronary vascular response to arterial blood gas changes in humans. Am J Physiol Heart Circ Physiol 2018; 315:H132-H140. [PMID: 29600897 DOI: 10.1152/ajpheart.00689.2017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
It remains unclear if the human coronary vasculature is inherently sensitive to changes in arterial Po2 and Pco2 or if coronary vascular responses are the result of concomitant increases in myocardial O2 consumption/demand ([Formula: see text]). We hypothesized that the coronary vascular response to Po2 and Pco2 would be attenuated in healthy men when [Formula: see text] was attenuated with β1-adrenergic receptor blockade. Healthy men (age: 25 ± 1 yr, n = 11) received intravenous esmolol (β1-adrenergic receptor antagonist) or volume-matched saline in a double-blind, randomized crossover study and were exposed to poikilocapnic hypoxia, isocapnic hypoxia, and hypercapnic hypoxia. Measurements made at baseline and after 5 min of steady state at each gas manipulation included left anterior descending coronary blood velocity (LADV; Doppler echocardiography), heart rate, and arterial blood pressure. LADV values at the end of each hypoxic condition were compared between esmolol and placebo. The rate-pressure product (RPP) and left ventricular mechanical energy (MELV) were calculated as indexes of [Formula: see text]. All gas manipulations augmented RPP, MELV, and LADV, but only RPP and MELV were attenuated (4-18%) after β1-adrenergic receptor blockade ( P < 0.05). Despite attenuated RPP and MELV responses, β1-adrenergic receptor blockade did not attenuate the mean LADV vasodilatory response compared with placebo during poikilocapnic hypoxia (29.4 ± 2.2 vs. 27.3 ± 1.6 cm/s) and isocapnic hypoxia (29.5 ± 1.5 vs. 30.3 ± 2.2 cm/s). Hypercapnic hypoxia elicited a feedforward coronary dilation that was blocked by β1-adrenergic receptor blockade. These results indicate a direct influence of arterial Po2 on coronary vascular regulation that is independent of [Formula: see text]. NEW & NOTEWORTHY In humans, arterial hypoxemia led to an increase in epicardial coronary artery blood velocity. β1-Adrenergic receptor blockade did not diminish the hypoxemic coronary response despite reduced myocardial O2 demand. These data indicate hypoxemia can regulate coronary blood flow independent of myocardial O2 consumption. A plateau in the mean left anterior descending coronary artery blood velocity-rate-pressure product relationship suggested β1-adrenergic receptor-mediated, feedforward epicardial coronary artery dilation. In addition, we observed a synergistic effect of Po2 and Pco2 during hypercapnic hypoxia.
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Affiliation(s)
- Tyler D Vermeulen
- Centre for Heart, Lung, and Vascular Health, School of Health and Exercise Science, University of British Columbia , Kelowna, British Columbia , Canada
| | - Lindsey M Boulet
- Centre for Heart, Lung, and Vascular Health, School of Health and Exercise Science, University of British Columbia , Kelowna, British Columbia , Canada
| | - Mike Stembridge
- Cardiff School of Sport, Cardiff Metropolitan University , Cardiff , United Kingdom
| | - Alexandra M Williams
- Centre for Heart, Lung, and Vascular Health, School of Health and Exercise Science, University of British Columbia , Kelowna, British Columbia , Canada
| | | | | | - Chris Gasho
- Loma Linda University , Loma Linda, California
| | - Philip N Ainslie
- Centre for Heart, Lung, and Vascular Health, School of Health and Exercise Science, University of British Columbia , Kelowna, British Columbia , Canada
| | - Eric O Feigl
- Department of Physiology and Biophysics, University of Washington , Seattle, Washington
| | - Glen E Foster
- Centre for Heart, Lung, and Vascular Health, School of Health and Exercise Science, University of British Columbia , Kelowna, British Columbia , Canada
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22
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The hemodynamic response to constant dobutamine infusion: the effect of ADRB1 389 polymorphism and sex. Pharmacogenet Genomics 2018; 28:139-146. [PMID: 29768300 DOI: 10.1097/fpc.0000000000000338] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
OBJECTIVES Prolonged activation of the β-1 adrenergic receptor (ADRB1) is associated with receptor desensitization. This process has been suggested to have important pathophysiological and clinical implications in conditions such as congestive heart failure. The contribution of genetic factors to this process is a subject of ongoing research. We have previously shown that the ADRB1 389 polymorphism affects the response to incremental dose infusion of the ADRB agonist dobutamine. The aim of the current study was to determine whether the ADRB1 389 polymorphism affects the hemodynamic response to constant dose infusion of dobutamine in healthy patients. PATIENTS AND METHODS Healthy patients were recruited according to their ADRB1 49 and 389 genotypes [15 Arg389Arg, 10 Gly389Arg, and 10 Gly389Gly patients (all Ser49Ser), 21 men and 14 women]. Following a standardized protocol of dose increase, 6 mcg/kg/min dobutamine was infused over 2 h. Heart rate (HR), blood pressure (BP), and active plasma renin (PR) were measured. Standardized exercise (1 min) was performed at three time points during infusion. RESULTS In all patients, resting systolic BP was significantly decreased during infusion [144.4±11.5 vs. 140.3±12.2 mmHg (mean±SD), P=0.007]. There was no change in HR, and PR following 120 min of dobutamine infusion. ADRB1 389 genotypes were not associated with HR, systolic BP, and PR changes during dobutamine infusion (all P>0.05, repeated measures analysis of variance). Sex was associated with response to dobutamine. Among women, but not in men, resting HR significantly increased, and diastolic blood pressure (DBP) significantly decreased during dobutamine infusion [HR: 76.0±7.3 to 86.3±17.5 beats per minute (P=0.023), and DBP 78.5±8.49 mmHg to 72.36±6.16 (P=0.041) (repeated measures analysis of variance)]. CONCLUSION In healthy patients, the ADRB1 389 genotype was not associated with hemodynamic changes during constant dobutamine infusion. In women, but not in men, HR significantly increased and DBP decreased during 2 h of infusion.
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β-adrenergic Receptor-stimulated Cardiac Myocyte Apoptosis: Role of Cytochrome P450 ω-hydroxylase. J Cardiovasc Pharmacol 2018; 70:94-101. [PMID: 28768289 DOI: 10.1097/fjc.0000000000000499] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Prolonged or excessive β-adrenergic activation leads to cardiac myocyte loss and heart dysfunction; however, the underlying cellular mechanisms are still unclear. Therefore, we first confirmed the effect of isoproterenol (ISO), a β-adrenergic receptor agonist, on cardiac toxicity using TUNEL and caspase activity assays in cultured rat cardiomyocytes. ISO treatment significantly increased cardiomyocyte apoptosis. Persistent ISO stimulation of cardiomyocytes also increased the expression of CYP4A3, a major CYP450 ω-hydroxylase that produces 20-hydroxyeicosatetraenoic acid (20-HETE) in a time-dependent manner. Next, we examined the effect of ISO and 20-HETE on cardiomyocyte apoptosis using annexin V and propidium iodide staining. Treatment with either 20-HETE or ISO significantly increased cardiomyocyte apoptosis, and inhibition of 20-HETE production using 17-ODYA, a CYP450 ω-hydroxylase inhibitor, dramatically attenuated ISO-induced cardiomyocyte apoptosis. To determine the apoptotic pathway involved, the mitochondrial membrane potential (ΔΨm) was measured by detecting the ratio of JC-1 green/red emission intensity. The results demonstrated that 17-ODYA significantly abolished ISO-induced disruption of ΔΨm and that 20-HETE alone induced a marked disruptive effect on ΔΨm in cardiomyocytes. In addition, 20-HETE-induced disruption of ΔΨm and apoptosis was significantly attenuated by KN93, a CaMKII inhibitor. Taken together, these results demonstrate that 20-HETE treatment induces significant apoptosis via mitochondrial-dependent pathways, and that inhibition of 20-HETE production using 17-ODYA attenuates ISO-induced cardiomyocyte apoptosis.
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Roca R, Esteban P, Zapater P, Inda MDM, Conte AL, Gómez-Escolar L, Martínez H, Horga JF, Palazon JM, Peiró AM. β2‑adrenergic receptor functionality and genotype in two different models of chronic inflammatory disease: Liver cirrhosis and osteoarthritis. Mol Med Rep 2018; 17:7987-7995. [PMID: 29620176 DOI: 10.3892/mmr.2018.8820] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Accepted: 09/28/2017] [Indexed: 11/06/2022] Open
Abstract
The present study was designed to investigate the functional status of β2 adrenoceptors (β2AR) in two models of chronic inflammatory disease: liver cirrhosis (LC) and osteoarthritis (OA). The β2AR gene contains three single nucleotide polymorphisms at amino acid positions 16, 27 and 164. The aim of the present study was to investigate the potential influence of lymphocyte β2AR receptor functionality and genotype in LC and OA patients. Blood samples from cirrhotic patients (n=52, hepatic venous pressure gradient 13±4 mmHg, CHILD 7±2 and MELD 11±4 scores), OA patients (n=30, 84% Kellgren‑Lawrence severity 4 grade, 14% knee replacement joint) and healthy volunteers as control group (n=26) were analyzed. Peripheral blood mononuclear cells (PBMC) were isolated from whole blood and basal and isoproterenol induced adenylate cyclase activity (isoproterenol stimulus from 10‑9 to 10‑4 mM), and β2AR allelic variants (rs1042713, rs1042714, rs1800888) were determined. β2AR functionality was decreased in the two different models of chronic inflammatory disease studied, OA (50% vs. control) and LC (85% vs. control). In these patients, the strength of the β2AR response to adrenergic stimulation was very limited. Adrenergic modulation of PBMC function through the β2AR stimulus is decreased in chronic inflammatory processes including LC and OA, suggesting that the adrenergic system may be important in the development of these processes.
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Affiliation(s)
- Reyes Roca
- Occupational Observatory, Miguel Hernández University (UMH) of Elche, 03202 Elche, Spain
| | - Pablo Esteban
- Occupational Observatory, Miguel Hernández University (UMH) of Elche, 03202 Elche, Spain
| | - Pedro Zapater
- CIBERehd, Carlos III Health Institute, 28029 Madrid, Spain
| | - María-Del-Mar Inda
- Neuropharmacology on Pain (NED) Research Group, ISABIAL‑FISABIO, General Hospital of Alicante, 03010 Alicante, Spain
| | - Anna Lucia Conte
- Occupational Observatory, Miguel Hernández University (UMH) of Elche, 03202 Elche, Spain
| | | | | | - José F Horga
- Clinical Pharmacology, General Hospital of Alicante, 03010 Alicante, Spain
| | - José M Palazon
- Liver Unit, General Hospital of Alicante, 03010 Alicante, Spain
| | - Ana M Peiró
- Clinical Pharmacology, General Hospital of Alicante, 03010 Alicante, Spain
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Rosa GM, Baccino D, Valbusa A, Scala C, Barra F, Brunelli C, Ferrero S. Cardiovascular effects of antimuscarinic agents and beta3-adrenergic receptor agonist for the treatment of overactive bladder. Expert Opin Drug Saf 2018. [PMID: 29542337 DOI: 10.1080/14740338.2018.1453496] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
INTRODUCTION Overactive bladder (OAB) syndrome is common in the general population, particularly in elderly patients. Antimuscarinic drugs (AMs) are considered the mainstay pharmaceutical treatment of OAB whereas β3-adrenoceptor agonists, such as mirabegron, represent a good alternative. Owing to the important role of muscarinic and β3 receptors in cardiovascular (CV) tissue and to the fact that OAB patients often have CV comorbidities, the safety-profile of these drugs constitute an important challenge. AREAS COVERED The aim of this review is to evaluate the CV effects of AMs and mirabegron in OAB. A systematic literature search from inception until December 2017 was performed on PubMed and Medline. EXPERT OPINION AMs are generally considered to have good CV safety profile but, however, they may cause undesirable adverse events, such as dry mouth, constipation. CV AEs are rare but noteworthy, the most common CV consequences related to the use of these drugs are constituted by an increase in HR and QT interval. Mirabegron has similar efficacy and tolerability to AMs but causes less adverse events, with either modest hypertension and modest increase in HR (<5 bpm) being the most commonly reported.
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Affiliation(s)
- Gian Marco Rosa
- a Department of Internal Medicine, Cardiology , Ospedale Policlinico San Martino , Genoa , Italy
| | - Danilo Baccino
- a Department of Internal Medicine, Cardiology , Ospedale Policlinico San Martino , Genoa , Italy
| | - Alberto Valbusa
- a Department of Internal Medicine, Cardiology , Ospedale Policlinico San Martino , Genoa , Italy
| | - Carolina Scala
- b Academic Unit of Obstetrics and Gynecology , Ospedale Policlinico San Martino , Genoa , Italy.,c Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (DiNOGMI) , University of Genoa , Genoa , Italy
| | - Fabio Barra
- b Academic Unit of Obstetrics and Gynecology , Ospedale Policlinico San Martino , Genoa , Italy.,c Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (DiNOGMI) , University of Genoa , Genoa , Italy
| | - Claudio Brunelli
- a Department of Internal Medicine, Cardiology , Ospedale Policlinico San Martino , Genoa , Italy
| | - Simone Ferrero
- b Academic Unit of Obstetrics and Gynecology , Ospedale Policlinico San Martino , Genoa , Italy.,c Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (DiNOGMI) , University of Genoa , Genoa , Italy
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26
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Sales MM, Sousa CV, da Silva Aguiar S, Knechtle B, Nikolaidis PT, Alves PM, Simões HG. An integrative perspective of the anaerobic threshold. Physiol Behav 2017; 205:29-32. [PMID: 29248631 DOI: 10.1016/j.physbeh.2017.12.015] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Revised: 12/13/2017] [Accepted: 12/13/2017] [Indexed: 10/18/2022]
Abstract
The concept of anaerobic threshold (AT) was introduced during the nineteen sixties. Since then, several methods to identify the anaerobic threshold (AT) have been studied and suggested as novel 'thresholds' based upon the variable used for its detection (i.e. lactate threshold, ventilatory threshold, glucose threshold). These different techniques have brought some confusion about how we should name this parameter, for instance, anaerobic threshold or the physiological measure used (i.e. lactate, ventilation). On the other hand, the modernization of scientific methods and apparatus to detect AT, as well as the body of literature formed in the past decades, could provide a more cohesive understanding over the AT and the multiple physiological systems involved. Thus, the purpose of this review was to provide an integrative perspective of the methods to determine AT.
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Affiliation(s)
| | - Caio Victor Sousa
- Graduate Program in Physical Education, Universidade Católica de Brasília, Distrito Federal, Brazil.
| | - Samuel da Silva Aguiar
- Graduate Program in Physical Education, Universidade Católica de Brasília, Distrito Federal, Brazil
| | - Beat Knechtle
- Gesundheitszentrum St. Gallen, St. Gallen, Switzerland; Institute of Primary Care, University of Zurich, Zurich, Switzerland
| | | | | | - Herbert Gustavo Simões
- Graduate Program in Physical Education, Universidade Católica de Brasília, Distrito Federal, Brazil
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Fu Q, Hu Y, Wang Q, Liu Y, Li N, Xu B, Kim S, Chiamvimonvat N, Xiang YK. High-fat diet induces protein kinase A and G-protein receptor kinase phosphorylation of β 2 -adrenergic receptor and impairs cardiac adrenergic reserve in animal hearts. J Physiol 2017; 595:1973-1986. [PMID: 27983752 PMCID: PMC5350441 DOI: 10.1113/jp273314] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Accepted: 11/23/2016] [Indexed: 11/08/2022] Open
Abstract
Key points Patients with diabetes show a blunted cardiac inotropic response to β‐adrenergic stimulation despite normal cardiac contractile reserve. Acute insulin stimulation impairs β‐adrenergically induced contractile function in isolated cardiomyocytes and Langendorff‐perfused hearts. In this study, we aimed to examine the potential effects of hyperinsulinaemia associated with high‐fat diet (HFD) feeding on the cardiac β2‐adrenergic receptor signalling and the impacts on cardiac contractile function. We showed that 8 weeks of HFD feeding leads to reductions in cardiac functional reserve in response to β‐adrenergic stimulation without significant alteration of cardiac structure and function, which is associated with significant changes in β2‐adrenergic receptor phosphorylation at protein kinase A and G‐protein receptor kinase sites in the myocardium. The results suggest that clinical intervention might be applied to subjects in early diabetes without cardiac symptoms to prevent further cardiac complications.
Abstract Patients with diabetes display reduced exercise capability and impaired cardiac contractile reserve in response to adrenergic stimulation. We have recently uncovered an insulin receptor and adrenergic receptor signal network in the heart. The aim of this study was to understand the impacts of high‐fat diet (HFD) on the insulin–adrenergic receptor signal network in hearts. After 8 weeks of HFD feeding, mice exhibited diabetes, with elevated insulin and glucose concentrations associated with body weight gain. Mice fed an HFD had normal cardiac structure and function. However, the HFD‐fed mice displayed a significant elevation of phosphorylation of the β2‐adrenergic receptor (β2AR) at both the protein kinase A site serine 261/262 and the G‐protein‐coupled receptor kinase site serine 355/356 and impaired adrenergic reserve when compared with mice fed on normal chow. Isolated myocytes from HFD‐fed mice also displayed a reduced contractile response to adrenergic stimulation when compared with those of control mice fed normal chow. Genetic deletion of the β2AR led to a normalized adrenergic response and preserved cardiac contractile reserve in HFD‐fed mice. Together, these data indicate that HFD promotes phosphorylation of the β2AR, contributing to impairment of cardiac contractile reserve before cardiac structural and functional remodelling, suggesting that early intervention in the insulin–adrenergic signalling network might be effective in prevention of cardiac complications in diabetes. Patients with diabetes show a blunted cardiac inotropic response to β‐adrenergic stimulation despite normal cardiac contractile reserve. Acute insulin stimulation impairs β‐adrenergically induced contractile function in isolated cardiomyocytes and Langendorff‐perfused hearts. In this study, we aimed to examine the potential effects of hyperinsulinaemia associated with high‐fat diet (HFD) feeding on the cardiac β2‐adrenergic receptor signalling and the impacts on cardiac contractile function. We showed that 8 weeks of HFD feeding leads to reductions in cardiac functional reserve in response to β‐adrenergic stimulation without significant alteration of cardiac structure and function, which is associated with significant changes in β2‐adrenergic receptor phosphorylation at protein kinase A and G‐protein receptor kinase sites in the myocardium. The results suggest that clinical intervention might be applied to subjects in early diabetes without cardiac symptoms to prevent further cardiac complications.
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Affiliation(s)
- Qin Fu
- Department of Pharmacology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,The Key Laboratory for Drug Target Research and Pharmacodynamic Evaluation of Hubei Province, Wuhan, China
| | - Yuting Hu
- Department of Pharmacology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,The Key Laboratory for Drug Target Research and Pharmacodynamic Evaluation of Hubei Province, Wuhan, China
| | - Qingtong Wang
- Department of Pharmacology, University of California, Davis, CA, USA.,Institute of Clinical Pharmacology, Key Laboratory of Anti-inflammatory and Immune Medicine, Ministry of Education, Collaborative Innovation Centre of Anti-inflammatory and Immune Medicine, Anhui Medical University, Hefei, China
| | - Yongming Liu
- Department of Pharmacology, University of California, Davis, CA, USA.,Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Ning Li
- Division of Cardiovascular Medicine, Department of Medicine, University of California, Davis, CA, USA
| | - Bing Xu
- Department of Pharmacology, University of California, Davis, CA, USA
| | - Sungjin Kim
- Department of Pharmacology, University of California, Davis, CA, USA
| | - Nipavan Chiamvimonvat
- Division of Cardiovascular Medicine, Department of Medicine, University of California, Davis, CA, USA.,VA Northern California Healthcare System, Mather, CA, USA
| | - Yang K Xiang
- Department of Pharmacology, University of California, Davis, CA, USA.,Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,VA Northern California Healthcare System, Mather, CA, USA
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Targeting GPCR-Gβγ-GRK2 signaling as a novel strategy for treating cardiorenal pathologies. Biochim Biophys Acta Mol Basis Dis 2017; 1863:1883-1892. [PMID: 28130200 DOI: 10.1016/j.bbadis.2017.01.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Revised: 01/13/2017] [Accepted: 01/18/2017] [Indexed: 02/06/2023]
Abstract
The pathologic crosstalk between the heart and kidney is known as cardiorenal syndrome (CRS). While the specific mechanisms underlying this crosstalk remain poorly understood, CRS is associated with exacerbated dysfunction of either or both organs and reduced survival. Maladaptive fibrotic remodeling is a key component of both heart and kidney failure pathogenesis and progression. G-protein coupled receptor (GPCR) signaling is a crucial regulator of cardiovascular and renal function. Chronic/pathologic GPCR signaling elicits the interaction of the G-protein Gβγ subunit with GPCR kinase 2 (GRK2), targeting the receptor for internalization, scaffolding to pathologic signals, and receptor degradation. Targeting this pathologic Gβγ-GRK2 interaction has been suggested as a possible strategy for the treatment of HF. In the current review, we discuss recent updates in understanding the role of GPCR-Gβγ-GRK2 signaling as a crucial mediator of maladaptive organ remodeling detected in HF and kidney dysfunction, with specific attention to small molecule-mediated inhibition of pathologic Gβγ-GRK2 interactions. Further, we explore the potential of GPCR-Gβγ-GRK2 signaling as a possible therapeutic target for cardiorenal pathologies.
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30
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Kim KE, Tae HJ, Natalia P, Lee JC, Ahn JH, Park JH, Kim IH, Ohk TG, Park CW, Cho JH, Won MH. Cardiac physiologic regulation of sub-type specific adrenergic receptors in transgenic mice overexpressing β 1- and β 2-adrenergic receptors. Clin Exp Emerg Med 2016; 3:175-180. [PMID: 27752636 PMCID: PMC5065340 DOI: 10.15441/ceem.16.141] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Revised: 04/29/2016] [Accepted: 05/10/2016] [Indexed: 01/28/2023] Open
Abstract
Objective Combination of β1-adrenergic receptor (AR) blockade and β2-AR activation might be a potential novel therapy for treating heart failure. However, use of β-AR agonists and/or antagonists in the clinical setting is controversial because of the lack of information on cardiac inotropic or chronotropic regulation by AR signaling. Methods In this study, we performed hemodynamic evaluation by examining force frequency response (FFR), Frank-Starling relationship, and response to a non-selective β-AR agonist (isoproterenol) in hearts isolated from 6-month-old transgenic (TG) mice overexpressing β1- and β2-ARs (β1- and β2-AR TG mice, respectively). Results Cardiac physiologic consequences of β1- and β2-AR overexpression resulted in similar maximal response to isoproterenol and faster temporary decline of positive inotropic response in β2-AR TG mice. β1-AR TG mice showed a pronounced negative limb of FFR, whereas β2-AR TG mice showed high stimulation frequencies with low contractile depression during FFR. In contrast, Frank-Starling relationship was equally enhanced in both β1- and β2-AR TG mice. Conclusion Hemodynamic evaluation performed in the present showed a difference in β1- and β2-AR signaling, which may be due to the difference in the desensitization of β1- and β2-ARs.
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Affiliation(s)
- Ka Eul Kim
- Department of Biomedical Science, Research Institute of Bioscience and Biotechnology, Hallym University, Chuncheon, Korea
| | - Hyun-Jin Tae
- Department of Emergency Medicine, Kangwon National University School of Medicine, Chuncheon, Korea; Bio-Safety Research Institute, College of Veterinary Medicine, Chonbuk National University, Iksan, Korea
| | - Petrashevskaya Natalia
- CardioPulmonary Genomics Program, Departments of Medicine and Physiology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Jae-Chul Lee
- Department of Neurobiology, Kangwon National University School of Medicine, Chuncheon, Korea
| | - Ji Hyeon Ahn
- Department of Neurobiology, Kangwon National University School of Medicine, Chuncheon, Korea
| | - Joon Ha Park
- Department of Neurobiology, Kangwon National University School of Medicine, Chuncheon, Korea
| | - In Hye Kim
- Department of Neurobiology, Kangwon National University School of Medicine, Chuncheon, Korea
| | - Taek Geun Ohk
- Department of Emergency Medicine, Kangwon National University School of Medicine, Chuncheon, Korea
| | - Chan Woo Park
- Department of Emergency Medicine, Kangwon National University School of Medicine, Chuncheon, Korea
| | - Jun Hwi Cho
- Department of Emergency Medicine, Kangwon National University School of Medicine, Chuncheon, Korea
| | - Moo-Ho Won
- Department of Neurobiology, Kangwon National University School of Medicine, Chuncheon, Korea
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31
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Howell EH, Cameron SJ. Neprilysin inhibition: A brief review of past pharmacological strategies for heart failure treatment and future directions. Cardiol J 2016; 23:591-598. [PMID: 27665860 DOI: 10.5603/cj.a2016.0063] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Revised: 09/13/2016] [Accepted: 08/30/2016] [Indexed: 12/11/2022] Open
Abstract
Heart failure (HF) is a manifestation of aberrant vascular responses and remains a public health concern with a worldwide prevalence of around 23 million and a 5-year mortality numerically equivalent to many cancers. Over the last two decades, mortality from HF reached a plateau with current pharmaceutical agents and mechanical cardiac support. In the last several years, various "novel" pharmaceutical agents have been tested in clinical trials and ultimately met with disappointment, showing only incremental benefit in the treatment of HF. Designing a HF drug with enhanced efficacy over existing agents seemed like a Sisyphean task. Yet again, pharmaceutical chemists have demonstrated their prowess in lateral thinking by developing a vasoactive agent which is a co-crystallized compound of valsartan and sacubitril in a one-to-one molar ratio; the former molecule belongs to a family of agents that are the current standard of care for HF and the latter molecule is a novel agent which inhibits neprilysin - a neutral endopeptidase found in human plasma which alters neurohumoral responses. In July of 2015, a drug which is a combination of valsartan and sacubitril was formally licensed by the United States Food and Drug Administration for the treatment of HF. This review describes the evolution of HF medications focusing on rational drug design with the first HF medication, the beta-adrenergic receptor antagonist. We then discuss the biochemical and physiological properties of sacubitril/valsartan which likely lead to its dramatic ability to ameliorate HF mortality.
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Affiliation(s)
| | - Scott J Cameron
- Department of Medicine, Division of Cardiology, and Aab Institute for Cardiovascular Research, University of Rochester School of Medicine and Dentistry, Rochester, NY, United States.
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Ryan KM, Griffin ÉW, Ryan KJ, Tanveer R, Vanattou-Saifoudine N, McNamee EN, Fallon E, Heffernan S, Harkin A, Connor TJ. Clenbuterol activates the central IL-1 system via the β2-adrenoceptor without provoking inflammatory response related behaviours in rats. Brain Behav Immun 2016; 56:114-29. [PMID: 26928198 DOI: 10.1016/j.bbi.2016.02.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Revised: 02/18/2016] [Accepted: 02/25/2016] [Indexed: 01/09/2023] Open
Abstract
The long-acting, highly lipophilic, β2-adrenoceptor agonist clenbuterol may represent a suitable therapeutic agent for the treatment of neuroinflammation as it drives an anti-inflammatory response within the CNS. However, clenbuterol is also known to increase the expression of IL-1β in the brain, a potent neuromodulator that plays a role in provoking sickness related symptoms including anxiety and depression-related behaviours. Here we demonstrate that, compared to the immunological stimulus lipopolysaccharide (LPS, 250μg/kg), clenbuterol (0.5mg/kg) selectively up-regulates expression of the central IL-1 system resulting in a mild stress-like response which is accompanied by a reduction in locomotor activity and food consumption in rats. We provide further evidence that clenbuterol-induced activation of the central IL-1 system occurs in a controlled and selective manner in tandem with its negative regulators IL-1ra and IL-1RII. Furthermore, we demonstrate that peripheral β2-adrenoceptors mediate the suppression of locomotor activity and food consumption induced by clenbuterol and that these effects are not linked to the central induction of IL-1β. Moreover, despite increasing central IL-1β expression, chronic administration of clenbuterol (0.03mg/kg; twice daily for 21days) fails to induce anxiety or depressive-like behaviour in rats in contrast to reports of the ability of exogenously administered IL-1 to induce these symptoms in rodents. Overall, our findings suggest that clenbuterol or other selective β2-adrenoceptor agonists could have the potential to combat neuroinflammatory or neurodegenerative disorders without inducing unwanted symptoms of depression and anxiety.
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Affiliation(s)
- Karen M Ryan
- Neuroimmunology Research Group, Trinity College Institute of Neuroscience, Department of Physiology & School of Medicine, Trinity College, Dublin 2, Ireland
| | - Éadaoin W Griffin
- Neuroimmunology Research Group, Trinity College Institute of Neuroscience, Department of Physiology & School of Medicine, Trinity College, Dublin 2, Ireland
| | - Katie J Ryan
- Neuroimmunology Research Group, Trinity College Institute of Neuroscience, Department of Physiology & School of Medicine, Trinity College, Dublin 2, Ireland
| | - Riffat Tanveer
- Neuroimmunology Research Group, Trinity College Institute of Neuroscience, Department of Physiology & School of Medicine, Trinity College, Dublin 2, Ireland
| | - Natacha Vanattou-Saifoudine
- Neuropsychopharmacology Research Group, School of Pharmacy and Pharmaceutical Sciences & Trinity College Institute of Neuroscience, Trinity College, Dublin 2, Ireland
| | - Eoin N McNamee
- Neuroimmunology Research Group, Trinity College Institute of Neuroscience, Department of Physiology & School of Medicine, Trinity College, Dublin 2, Ireland
| | - Emer Fallon
- Neuroimmunology Research Group, Trinity College Institute of Neuroscience, Department of Physiology & School of Medicine, Trinity College, Dublin 2, Ireland
| | - Sheena Heffernan
- Neuroimmunology Research Group, Trinity College Institute of Neuroscience, Department of Physiology & School of Medicine, Trinity College, Dublin 2, Ireland
| | - Andrew Harkin
- Neuropsychopharmacology Research Group, School of Pharmacy and Pharmaceutical Sciences & Trinity College Institute of Neuroscience, Trinity College, Dublin 2, Ireland.
| | - Thomas J Connor
- Neuroimmunology Research Group, Trinity College Institute of Neuroscience, Department of Physiology & School of Medicine, Trinity College, Dublin 2, Ireland
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Impact of the canine double-deletion β1 adrenoreceptor polymorphisms on protein structure and heart rate response to atenolol, a β1-selective β-blocker. Pharmacogenet Genomics 2016; 25:427-31. [PMID: 26065525 DOI: 10.1097/fpc.0000000000000152] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
OBJECTIVE β-Adrenergic receptor antagonists are widely utilized for the management of cardiac diseases in dogs. We have recently identified two deletion polymorphisms in the canine adrenoreceptor 1 (ADRB1) gene.We hypothesized that canine ADRB1 deletions would alter the structure of the protein, as well as the heart rate response to the β-adrenergic receptor antagonist, atenolol. The objectives of this study were to predict the impact of these deletions on the predicted structure of the protein and on the heart rate response to atenolol in a population of healthy adult dogs. METHODS Eighteen apparently healthy, mature dogs with (11) and without (seven) ADRB1 deletions were evaluated. The heart rate of the dogs was evaluated with a baseline ambulatory ECG before and 14-21 days after atenolol therapy (1 mg/kg orally q12 h). Minimum, average, and maximum heart rates were compared between groups of dogs (deletions, controls) using an unpaired t-test and within each group of dogs using a paired t-test. The protein structure of ADRB1 was predicted by computer modeling. RESULTS Deletions were predicted to alter the structure of the ADRB1 protein. The heart rates of the dogs with deletions were lower than those of the control dogs (the average heart rates were significantly lower). CONCLUSION ADRB1 deletions appear to have structural and functional consequences. Individual genome-based treatment recommendations could impact the management of dogs with heart disease.
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Hoffmann S, Böhme J, Kube C, Haufe J, Krautwald-Junghanns ME, Abraham G. Differential regulation of the β-adrenoceptor density and cyclic AMP level with age and sex in turkey cardiac chambers. Eur J Pharmacol 2016; 777:88-95. [PMID: 26957056 DOI: 10.1016/j.ejphar.2016.02.065] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Revised: 02/25/2016] [Accepted: 02/26/2016] [Indexed: 11/25/2022]
Abstract
Decreased responses of the heart to β-adrenoceptor stimulation with aging have been shown to occur merely in selected heart chambers in relation to increased catecholamine levels. However, there are no systematic studies that investigate all cardiac chambers with regard to receptor density and cAMP (adenosine 3', 5'-cyclic monophosphate) responses. We used meat-type turkey poults (British United Turkey (B.U.T.) Big 6) with increasing age because their heart seems to decrease in weight in relation to body weight and they are often used as an animal model for heart failure. The receptor density and distribution were quantified by radioligand binding analysis using (-)-[(125)I]-iodocyanopindolol and β-adrenoceptor subtype-specific antagonists (ICI 118.551 and CGP 20712 A) in membranes of four cardiac chambers (right and left atria and ventricles) of 6-week-, 12-week-, 16/21-week-, and 57-week-old B.U.T. BIG 6 turkeys. Receptor function was determined by measuring basal and stimulated cAMP production. In both sexes, the β-adrenoceptor density decreased significantly in all chambers with age without altered β-adrenoceptor subtype distribution. The receptor affinity (KD) to the radioligand was similar in hearts of all age groups. β-adrenoceptor-(isoproterenol and guanosine 5'-triphosphate), G-protein-(NaF) and catalytic unit of adenylate cyclase (forskolin, Mn(2+)) mediated cAMP responses were not chamber-dependent. Indeed, the cAMP level was significantly lower in 57-week-old hearts than in 6-week-, 12-week-, 16/21-week-old hearts. These data suggest that with increasing age and body weight, the β-adrenoceptor signal transduction pathway was highly blunted in all cardiac chambers, occurring by decreased receptor density and cAMP responses.
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Affiliation(s)
- Sandra Hoffmann
- Institute of Pharmacology, Pharmacy and Toxicology, Faculty of Veterinary Medicine, University of Leipzig, d-04103 Leipzig, Germany
| | - Julia Böhme
- Clinic for Birds and Reptiles, Faculty of Veterinary Medicine, University of Leipzig, d-04103 Leipzig, Germany
| | - Christian Kube
- Clinic for Birds and Reptiles, Faculty of Veterinary Medicine, University of Leipzig, d-04103 Leipzig, Germany
| | - Jörg Haufe
- GLU mbH, Rosa-Luxemburg-Damm 1, 15366 Neuenhagen, Germany
| | | | - Getu Abraham
- Institute of Pharmacology, Pharmacy and Toxicology, Faculty of Veterinary Medicine, University of Leipzig, d-04103 Leipzig, Germany.
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Bednarski M, Otto M, Dudek M, Kołaczkowski M, Bucki A, Siwek A, Groszek G, Maziarz E, Wilk P, Sapa J. Synthesis and Pharmacological Activity of a New Series of 1-(1H-Indol-4-yloxy)-3-(2-(2-methoxyphenoxy)ethylamino)propan-2-ol Analogs. Arch Pharm (Weinheim) 2016; 349:211-23. [PMID: 26853441 DOI: 10.1002/ardp.201500234] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Revised: 01/19/2016] [Accepted: 01/20/2016] [Indexed: 12/18/2022]
Abstract
β-Adrenergic receptor antagonists are important therapeutics for the treatment of cardiovascular disorders. In the group of β-blockers, much attention is being paid to the third-generation drugs that possess important ancillary properties besides inhibiting β-adrenoceptors. Vasodilating activity of these drugs is produced through different mechanisms, such as nitric oxide (NO) release, β2 -agonistic action, α1 -blockade, antioxidant action, and Ca(2+) entry blockade. Here, a study on evaluation of the cardiovascular activity of five new compounds is presented. Compound 3a is a methyl and four of the tested compounds (3b-e) are dimethoxy derivatives of 1-(1H-indol-4-yloxy)-3-(2-(2-methoxyphenoxy)ethylamino)propan-2-ol. The obtained results confirmed that the methyl and dimethoxy derivatives of 1-(1H-indol-4-yloxy)-3-(2-(2-methoxyphenoxy)ethylamino)propan-2-ol and their enantiomers possess α1 - and β1 -adrenolytic activities and that the antiarrhythmic and hypotensive effects of the tested compounds are related to their adrenolytic properties.
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Affiliation(s)
- Marek Bednarski
- Faculty of Pharmacy, Department of Pharmacological Screening, Medical College, Jagiellonian University, Krakow, Poland
| | - Monika Otto
- Faculty of Pharmacy, Department of Pharmacological Screening, Medical College, Jagiellonian University, Krakow, Poland
| | - Magdalena Dudek
- Faculty of Pharmacy, Department of Pharmacological Screening, Medical College, Jagiellonian University, Krakow, Poland
| | - Marcin Kołaczkowski
- Faculty of Pharmacy, Department of Pharmaceutical Chemistry, Medical College, Jagiellonian University, Krakow, Poland
| | - Adam Bucki
- Faculty of Pharmacy, Department of Pharmaceutical Chemistry, Medical College, Jagiellonian University, Krakow, Poland
| | - Agata Siwek
- Faculty of Pharmacy, Department of Pharmacobiology, Medical College, Jagiellonian University, Krakow, Poland
| | - Grażyna Groszek
- Faculty of Chemistry, Rzeszów University of Technology, Rzeszów, Poland
| | | | - Piotr Wilk
- Nencki Institute of Experimental Biology, Warszawa, Poland
| | - Jacek Sapa
- Faculty of Pharmacy, Department of Pharmacological Screening, Medical College, Jagiellonian University, Krakow, Poland
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Guo M, Guo G, Ji X. Genetic polymorphisms associated with heart failure: A literature review. J Int Med Res 2016; 44:15-29. [PMID: 26769713 PMCID: PMC5536573 DOI: 10.1177/0300060515604755] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Accepted: 08/03/2015] [Indexed: 12/22/2022] Open
Abstract
Objective To review possible associations reported between genetic variants and the risk, therapeutic response and prognosis of heart failure. Methods Electronic databases (PubMed, Web of Science and CNKI) were systematically searched for relevant papers, published between January 1995 and February 2015. Results Eighty-two articles covering 29 genes and 39 polymorphisms were identified. Conclusion Genetic association studies of heart failure have been highly controversial. There may be interaction or synergism of several genetic variants that together result in the ultimate pathological phenotype for heart failure.
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Affiliation(s)
- Mengqi Guo
- Key Laboratory of Cardiovascular Remodeling and Function Research, Department of Cardiology, Qilu Hospital, Shandong University, Jinan, China
| | - Guanlun Guo
- Hubei Key Laboratory of Advanced Technology of Automotive Components, School of Automotive Engineering, Wuhan University of Technology, Wuhan, China
| | - Xiaoping Ji
- Key Laboratory of Cardiovascular Remodeling and Function Research, Department of Cardiology, Qilu Hospital, Shandong University, Jinan, China
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Maranta F, Spoladore R, Fragasso G. Pathophysiological Mechanisms and Correlates of Therapeutic Pharmacological Interventions in Essential Arterial Hypertension. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2016; 956:37-59. [PMID: 27864806 DOI: 10.1007/5584_2016_169] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Treating arterial hypertension (HT) remains a hard task. The hypertensive patient is often a subject with several comorbidities and metabolic abnormalities. Clinicians everyday have to choose the right drug for the single patient among the different classes of antihypertensives. Apart from lowering blood pressure, a main therapeutic target should be that of counteracting all the possible pathophysiological mechanisms involved in HT itself and in existing/potential comorbidities. All the ancillary positive and negative effects of the administered drugs should be considered: in particular, since hypertensive patients are often glucose intolerant/diabetic, carrier of serum lipids disorder, have already developed atherosclerotic diseases and endothelial dysfunction, they should not be treated with drugs negatively interfering with these conditions but with molecules that, if possible, improve them. The main pathophysiological mechanisms and correlates of therapeutic pharmacological interventions in essential HT are reviewed here.
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Affiliation(s)
- Francesco Maranta
- Clinical Cardiology, Heart Failure Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Roberto Spoladore
- Clinical Cardiology, Heart Failure Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Gabriele Fragasso
- Clinical Cardiology, Heart Failure Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy.
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Grande F, Parisi OI, Mordocco RA, Rocca C, Puoci F, Scrivano L, Quintieri AM, Cantafio P, Ferla S, Brancale A, Saturnino C, Cerra MC, Sinicropi MS, Angelone T. Quercetin derivatives as novel antihypertensive agents: Synthesis and physiological characterization. Eur J Pharm Sci 2015; 82:161-70. [PMID: 26631584 DOI: 10.1016/j.ejps.2015.11.021] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Revised: 11/06/2015] [Accepted: 11/25/2015] [Indexed: 01/27/2023]
Abstract
The antihypertensive flavonol quercetin (Q1) is endowed with a cardioprotective effect against myocardial ischemic damage. Q1 inhibits angiotensin converting enzyme activity, improves vascular relaxation, and decreases oxidative stress and gene expression. However, the clinical application of this flavonol is limited by its poor bioavailability and low stability in aqueous medium. In the aim to overcome these drawbacks and preserve the cardioprotective effects of quercetin, the present study reports on the preparation of five different Q1 analogs, in which all OH groups were replaced by hydrophobic functional moieties. Q1 derivatives have been synthesized by optimizing previously reported procedures and analyzed by spectroscopic analysis. The cardiovascular properties of the obtained compounds were also investigated in order to evaluate whether chemical modification affects their biological efficacy. The interaction with β-adrenergic receptors was evaluated by molecular docking and the cardiovascular efficacy was investigated on the ex vivo Langendorff perfused rat heart. Furthermore, the bioavailability and the antihypertensive properties of the most active derivative were evaluated by in vitro studies and in vivo administration (1month) on spontaneously hypertensive rats (SHRs), respectively. Among all studied Q1 derivatives, only the ethyl derivative reduced left ventricular pressure (at 10(-8)M÷10(-6)M doses) and improved relaxation and coronary dilation. NOSs inhibition by L-NAME abolished inotropism, lusitropism and coronary effects. Chronic administration of high doses of this compound on SHR reduced systolic and diastolic pressure. Differently, the acetyl derivative induced negative inotropism and lusitropism (at 10(-10)M and 10(-8)÷10(-6)M doses), without affecting coronary pressure. Accordingly, docking studies suggested that these compounds bind both β1/β2-adrenergic receptors. Taking into consideration all the obtained results, the replacement of OH with ethyl groups seems to improve Q1 bioavailability and stability; therefore, the ethyl derivative could represent a good candidate for clinical use in hypertension.
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Affiliation(s)
- Fedora Grande
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Arcavacata di Rende, CS, Italy
| | - Ortensia I Parisi
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Arcavacata di Rende, CS, Italy; Department of Informatics, Modeling, Electronics and Systems Engineering, University of Calabria, 87036 Arcavacata di Rende, CS, Italy
| | - Roberta A Mordocco
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Arcavacata di Rende, CS, Italy
| | - Carmine Rocca
- Department of Biology, Ecology and E.S., University of Calabria, 87036 Arcavacata di Rende, CS, Italy
| | - Francesco Puoci
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Arcavacata di Rende, CS, Italy.
| | - Luca Scrivano
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Arcavacata di Rende, CS, Italy
| | - Anna M Quintieri
- Department of Biology, Ecology and E.S., University of Calabria, 87036 Arcavacata di Rende, CS, Italy
| | - Patrizia Cantafio
- Department of Biology, Ecology and E.S., University of Calabria, 87036 Arcavacata di Rende, CS, Italy
| | - Salvatore Ferla
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Wales, UK
| | - Andrea Brancale
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Wales, UK
| | - Carmela Saturnino
- Department of Pharmaceutical and Biomedical Sciences, University of Salerno, 84084 Fisciano, SA, Italy
| | - Maria C Cerra
- Department of Biology, Ecology and E.S., University of Calabria, 87036 Arcavacata di Rende, CS, Italy.
| | - Maria S Sinicropi
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Arcavacata di Rende, CS, Italy
| | - Tommaso Angelone
- Department of Biology, Ecology and E.S., University of Calabria, 87036 Arcavacata di Rende, CS, Italy
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Peculiar Effects of Selective Blockade of α2-Adrenoceptor Subtypes on Cardiac Chronotropy in Newborn Rats. Bull Exp Biol Med 2015; 160:6-8. [DOI: 10.1007/s10517-015-3084-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2014] [Indexed: 10/22/2022]
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40
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Synthesis and biological evaluation of 99mTc-labetalol for β1-adrenoceptor-mediated cardiac imaging. J Radioanal Nucl Chem 2015. [DOI: 10.1007/s10967-015-4622-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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41
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Soler F, Fernández-Belda F, Pérez-Schindler J, Hernández-Cascales J. Single inhibition of either PDE3 or PDE4 unmasks β2-adrenoceptor-mediated inotropic and lusitropic effects in the left but not right ventricular myocardium of rat. Eur J Pharmacol 2015; 765:429-36. [DOI: 10.1016/j.ejphar.2015.09.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Revised: 08/18/2015] [Accepted: 09/01/2015] [Indexed: 02/05/2023]
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Abstract
Physical challenges, emotional arousal, increased physical activity, or changes in the environment can evoke stress, requiring altered activity of visceral organs, glands, and smooth muscles. These alterations are necessary for the organism to function appropriately under these abnormal conditions and to restore homeostasis. These changes in activity comprise the "fight-or-flight" response and must occur rapidly or the organism may not survive. The rapid responses are mediated primarily via the catecholamines, epinephrine, and norepinephrine, secreted from the adrenal medulla. The catecholamine neurohormones interact with adrenergic receptors present on cell membranes of all visceral organs and smooth muscles, leading to activation of signaling pathways and consequent alterations in organ function and smooth muscle tone. During the "fight-or-flight response," the rise in circulating epinephrine and norepinephrine from the adrenal medulla and norepinephrine secreted from sympathetic nerve terminals cause increased blood pressure and cardiac output, relaxation of bronchial, intestinal and many other smooth muscles, mydriasis, and metabolic changes that increase levels of blood glucose and free fatty acids. Circulating catecholamines can also alter memory via effects on afferent sensory nerves impacting central nervous system function. While these rapid responses may be necessary for survival, sustained elevation of circulating catecholamines for prolonged periods of time can also produce pathological conditions, such as cardiac hypertrophy and heart failure, hypertension, and posttraumatic stress disorder. In this review, we discuss the present knowledge of the effects of circulating catecholamines on peripheral organs and tissues, as well as on memory in the brain.
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Affiliation(s)
- A William Tank
- Department of Pharmacology & Physiology, University of Rochester Medical Center, Rochester, NY, USA
| | - Dona Lee Wong
- Department of Psychiatry, Harvard Medical School, McLean Hospital, Belmont, MA, USA
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Effects of sex and the common ADRB1 389 genetic polymorphism on the hemodynamic response to dobutamine. Pharmacogenet Genomics 2015; 25:555-63. [PMID: 26313487 DOI: 10.1097/fpc.0000000000000174] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
INTRODUCTION The ADRB1 389 polymorphism affects responses to the β-1 adrenergic receptor (β1AR) agonist in vitro. Previous studies on its effect on the response to dobutamine stress echocardiography were conflicting. In addition, sex differences in the response to dobutamine have been suggested. The aim of this study was to determine whether the ADRB1 389 polymorphism affects the hemodynamic response to dobutamine in healthy individuals including men and women. PARTICIPANTS AND METHODS Healthy individuals were recruited according to their ADRB1 49 and 389 genotypes [15 Arg389Arg, 10 Gly389Arg, and 10 Gly389Gly individuals, (all Ser49Ser), 21 men and 14 women]. Dobutamine was infused at 2, 4, and 6 mcg/kg/min. Standardized exercise was performed during the last minute of each infusion. RESULTS Resting heart rate (HR) response to 6 mcg/kg/min dobutamine (ΔHR) was 4.7-fold larger in Arg389Arg than in Gly389Gly [(mean ± SD) 12.95 ± 6.99, 2.75 ± 1.65 bpm, respectively, PANOVA=0.012]. Renin response to dobutamine (ΔRenin) was 3.9-fold greater in Arg389Arg than in Gly389Gly (PANOVA=0.032). Among Arg389Gly heterozygotes, ΔHR and ΔRenin were not significantly different from either homozygote group. In multivariate analysis for ΔHR variance, significant contributions were observed for genotype (P=0.011), baseline HR (P=0.011), and borderline effect for sex (P=0.049). CONCLUSION In healthy individuals, HR and renin responses to dobutamine were more than three-fold greater among ADRB1 Arg389 compared with Gly389 homozygotes. Future studies on the effect of the ADRB1 389 polymorphism on dobutamine stress echocardiography should compare Arg389 and Gly389 homozygotes.
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Díaz-Araya G, Vivar R, Humeres C, Boza P, Bolivar S, Muñoz C. Cardiac fibroblasts as sentinel cells in cardiac tissue: Receptors, signaling pathways and cellular functions. Pharmacol Res 2015; 101:30-40. [PMID: 26151416 DOI: 10.1016/j.phrs.2015.07.001] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Revised: 06/30/2015] [Accepted: 07/01/2015] [Indexed: 12/24/2022]
Abstract
Cardiac fibroblasts (CF) not only modulate extracellular matrix (ECM) proteins homeostasis, but also respond to chemical and mechanical signals. CF express a variety of receptors through which they modulate the proliferation/cell death, autophagy, adhesion, migration, turnover of ECM, expression of cytokines, chemokines, growth factors and differentiation into cardiac myofibroblasts (CMF). Differentiation of CF to CMF involves changes in the expression levels of various receptors, as well as, changes in cell phenotype and their associated functions. CF and CMF express the β2-adrenergic receptor, and its stimulation activates PKA and EPAC proteins, which differentially modulate the CF and CMF functions mentioned above. CF and CMF also express different levels of Angiotensin II receptors, in particular, AT1R activation increases collagen synthesis and cell proliferation, but its overexpression activates apoptosis. CF and CMF express different levels of B1 and B2 kinin receptors, whose stimulation by their respective agonists activates common signaling transduction pathways that decrease the synthesis and secretion of collagen through nitric oxide and prostacyclin I2 secretion. Besides these classical functions, CF can also participate in the inflammatory response of cardiac repair, through the expression of receptors commonly associated to immune cells such as Toll like receptor 4, NLRP3 and interferon receptor. The activation by their respective agonists modulates the cellular functions already described and the release of cytokines and chemokines. Thus, CF and CMF act as sentinel cells responding to a plethora of stimulus, modifying their own behavior, and that of neighboring cells.
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Affiliation(s)
- G Díaz-Araya
- Laboratory of Molecular Pharmacology, Chemical Pharmacological and Toxicological Department, Faculty of Chemical and Pharmaceutical Sciences, FONDAP Advanced Center for Chronic diseases ACCDiS, University of Chile, Santiago, Chile.
| | - R Vivar
- Laboratory of Molecular Pharmacology, Chemical Pharmacological and Toxicological Department, Faculty of Chemical and Pharmaceutical Sciences, FONDAP Advanced Center for Chronic diseases ACCDiS, University of Chile, Santiago, Chile
| | - C Humeres
- Laboratory of Molecular Pharmacology, Chemical Pharmacological and Toxicological Department, Faculty of Chemical and Pharmaceutical Sciences, FONDAP Advanced Center for Chronic diseases ACCDiS, University of Chile, Santiago, Chile
| | - P Boza
- Laboratory of Molecular Pharmacology, Chemical Pharmacological and Toxicological Department, Faculty of Chemical and Pharmaceutical Sciences, FONDAP Advanced Center for Chronic diseases ACCDiS, University of Chile, Santiago, Chile
| | - S Bolivar
- Laboratory of Molecular Pharmacology, Chemical Pharmacological and Toxicological Department, Faculty of Chemical and Pharmaceutical Sciences, FONDAP Advanced Center for Chronic diseases ACCDiS, University of Chile, Santiago, Chile
| | - C Muñoz
- Laboratory of Molecular Pharmacology, Chemical Pharmacological and Toxicological Department, Faculty of Chemical and Pharmaceutical Sciences, FONDAP Advanced Center for Chronic diseases ACCDiS, University of Chile, Santiago, Chile
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45
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Weir MR. β-Blockers in the Treatment of Hypertension: Are There Clinically Relevant Differences? Postgrad Med 2015; 121:90-8. [DOI: 10.3810/pgm.2009.05.2007] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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46
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Soler F, Fernández-Belda F, Pérez-Schindler J, Handschin C, Fuente T, Hernandez-Cascales J. PDE2 activity differs in right and left rat ventricular myocardium and differentially regulates β2 adrenoceptor-mediated effects. Exp Biol Med (Maywood) 2014; 240:1205-13. [PMID: 25432985 DOI: 10.1177/1535370214560969] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Accepted: 09/30/2014] [Indexed: 11/16/2022] Open
Abstract
The important regulator of cardiac function, cAMP, is hydrolyzed by different cyclic nucleotide phosphodiesterases (PDEs), whose expression and activity are not uniform throughout the heart. Of these enzymes, PDE2 shapes β1 adrenoceptor-dependent cardiac cAMP signaling, both in the right and left ventricular myocardium, but its role in regulating β2 adrenoceptor-mediated responses is less well known. Our aim was to investigate possible differences in PDE2 transcription and activity between right (RV) and left (LV) rat ventricular myocardium, as well as its role in regulating β2 adrenoceptor effects. The free walls of the RV and the LV were obtained from Sprague-Dawley rat hearts. Relative mRNA for PDE2 (quantified by qPCR) and PDE2 activity (evaluated by a colorimetric procedure and using the PDE2 inhibitor EHNA) were determined in RV and LV. Also, β2 adrenoceptor-mediated effects (β2-adrenoceptor agonist salbutamol + β1 adrenoceptor antagonist CGP-20712A) on contractility and cAMP concentrations, in the absence or presence of EHNA, were studied in the RV and LV. PDE2 transcript levels were less abundant in RV than in LV and the contribution of PDE2 to the total PDE activity was around 25% lower in the microsomal fraction of the RV compared with the LV. β2 adrenoceptor activation increased inotropy and cAMP levels in the LV when measured in the presence of EHNA, but no such effects were observed in the RV, either in the presence or absence of EHNA. These results indicate interventricular differences in PDE2 transcript and activity levels, which may distinctly regulate β2 adrenoceptor-mediated contractility and cAMP concentrations in the RV and in the LV of the rat heart.
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Affiliation(s)
- Fernando Soler
- Department of Biochemistry and Molecular Biology A, University of Murcia, 30100 Murcia, Spain
| | | | | | - Christoph Handschin
- Biozentrum, University of Basel, Klingelbergstrasse 50/70, 4056 Basel, Switzerland
| | - Teodomiro Fuente
- Unit of Radiopharmacy, University Hospital Virgen de la Arrixaca, 30120 Murcia, Spain
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Abstract
SIGNIFICANCE Heart failure (HF) is a common end point for many underlying cardiovascular diseases. Down-regulation and desensitization of β-adrenergic receptors (β-AR) caused by G-protein-coupled receptor (GPCR) kinase 2 (GRK2) are prominent features of HF. Recent Advances and Critical Issues: Significant progress has been made to understand the pathological role of GRK2 in the heart both as a GPCR kinase and as a molecule that can exert GPCR-independent effects. Inhibition of cardiac GRK2 has proved to be therapeutic in the failing heart and may offer synergistic and additional benefits to β-blocker therapy. However, the mechanisms of how GRK2 directly contributes to the pathogenesis of HF need further investigation, and additional verification of the mechanistic details are needed before GRK2 inhibition can be used for the treatment of HF. FUTURE DIRECTIONS The newly identified characteristics of GRK2, including the S-nitrosylation of GRK2 and the localization of GRK2 on mitochondria, merit further investigation. They may contribute to it being a pro-death kinase and result in HF under stressed conditions through regulation of intracellular signaling, including cardiac reduction-oxidation (redox) balance. A thorough understanding of the functions of GRK2 in the heart is necessary in order to finalize it as a candidate for drug development.
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Affiliation(s)
- Zheng Maggie Huang
- Department of Pharmacology and Center for Translational Medicine, Temple University School of Medicine , Philadelphia, Pennsylvania
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Hoeker GS, Hood AR, Katra RP, Poelzing S, Pogwizd SM. Sex differences in β-adrenergic responsiveness of action potentials and intracellular calcium handling in isolated rabbit hearts. PLoS One 2014; 9:e111411. [PMID: 25340795 PMCID: PMC4207827 DOI: 10.1371/journal.pone.0111411] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Accepted: 10/02/2014] [Indexed: 11/20/2022] Open
Abstract
Cardioprotection in females, as observed in the setting of heart failure, has been attributed to sex differences in intracellular calcium handling and its modulation by β-adrenergic signaling. However, further studies examining sex differences in β-adrenergic responsiveness have yielded inconsistent results and have mostly been limited to studies of contractility, ion channel function, or calcium handling alone. Given the close interaction of the action potential (AP) and intracellular calcium transient (CaT) through the process of excitation-contraction coupling, the need for studies exploring the relationship between agonist-induced AP and calcium handling changes in female and male hearts is evident. Thus, the aim of this study was to use optical mapping to examine sex differences in ventricular APs and CaTs measured simultaneously from Langendorff-perfused hearts isolated from naïve adult rabbits during β-adrenergic stimulation. The non-selective β-agonist isoproterenol (Iso) decreased AP duration (APD90), CaT duration (CaD80), and the decay constant of the CaT (τ) in a dose-dependent manner (1–316.2 nM), with a plateau at doses ≥31.6 nM. The Iso-induced changes in APD90 and τ (but not CaD80) were significantly smaller in female than male hearts. These sex differences were more significant at faster (5.5 Hz) than resting rates (3 Hz). Treatment with Iso led to the development of spontaneous calcium release (SCR) with a dose threshold of 31.6 nM. While SCR occurrence was similar in female (49%) and male (53%) hearts, the associated ectopic beats had a lower frequency of occurrence (16% versus 40%) and higher threshold (100 nM versus 31.6 nM) in female than male hearts (p<0.05). In conclusion, female hearts had a decreased capacity to respond to β-adrenergic stimulation, particularly under conditions of increased demand (i.e. faster pacing rates and “maximal” levels of Iso effects), however this reduced β-adrenergic responsiveness of female hearts was associated with reduced arrhythmic activity.
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Affiliation(s)
- Gregory S. Hoeker
- Departments of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Ashleigh R. Hood
- Departments of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Rodolphe P. Katra
- Departments of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Steven Poelzing
- Department of Biomedical Engineering, Virginia Tech Carilion Research Institute, Roanoke, Virginia, United States of America
| | - Steven M. Pogwizd
- Departments of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- Biomedical Engineering, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- * E-mail:
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Laukova M, Tillinger A, Novakova M, Krizanova O, Kvetnansky R, Myslivecek J. Repeated immobilization stress increases expression of β3 -adrenoceptor in the left ventricle and atrium of the rat heart. Stress Health 2014; 30:301-9. [PMID: 23878066 DOI: 10.1002/smi.2515] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2012] [Revised: 05/24/2013] [Accepted: 06/21/2013] [Indexed: 11/12/2022]
Abstract
Stress is a contributor of many cardiovascular diseases. Positive inotropic and chronotropic effects of catecholamines are regulated via β-adrenergic receptors (ARs). Many reports exist concerning changes of cardiac β1 - and β2 -ARs in stress, but only a few deal with modulation of cardiac β3 -AR. Our aim was to analyze the expression and binding sites of β1 -, β2 - and β3 -ARs and adenylyl cyclase activity in the left ventricle, and β3 -AR expression and binding in the left atrium of rats exposed to acute and chronic immobilization stress (IMO). The concentration of noradrenaline in the ventricle decreased, while adrenaline increased, especially after repeated IMO. The mRNA and protein levels, and binding sites of β3 -subtype significantly rose following chronic IMO, while all parameters for β2 -AR dropped after single and repeated exposure. Similarly, the mRNA levels and binding sites for β3 -subtype increased in the left atrium as a consequence of chronic IMO. The rise in β3 -subtypes and a drop in β2 -subtypes resulted in inhibition of adenylyl cyclase activity within the left ventricle. Taken together, among other factors, up-regulation of β3 -AR could represent an adaptation mechanism, which might be related to altered physiological function of the left ventricle and atrium during prolonged emotional stress and might serve cardioprotective function during catecholamine overload.
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Affiliation(s)
- Marcela Laukova
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, NY, USA; Institute of Experimental Endocrinology, Slovak Academy of Sciences, Bratislava, Slovakia
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Rapacz A, Pytka K, Sapa J, Kubacka M, Filipek B, Szkaradek N, Marona H. Antiarrhythmic, hypotensive and α1-adrenolytic properties of new 2-methoxyphenylpiperazine derivatives of xanthone. Eur J Pharmacol 2014; 735:10-6. [DOI: 10.1016/j.ejphar.2014.04.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2013] [Revised: 03/26/2014] [Accepted: 04/01/2014] [Indexed: 01/16/2023]
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