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Figueroa-Valverde L, Rosas-Nexticapa M, Alvarez-Ramirez M, Melgarejo-Gutiérrez M, Mateu-Armand V, Garcimarrero-Espino A. Biological Activity of a Coumarin Derivative on Heart Failure Using an Ischemia/Reperfusion Injury Model. Drug Res (Stuttg) 2024; 74:47-52. [PMID: 38232750 DOI: 10.1055/a-2228-4258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2024]
Abstract
Heart failure is a health problem worldwide. There are some drugs for it, including digoxin, spironolactone, captopril, and valsartan, but some of these drugs can produce secondary effects, such as arrhythmia, cough, hyperkalemia, hyponatremia and hypotension. The aim of this research was to evaluate the biological activity of coumarin (2H-chromen-2-one) and its derivatives (3BrAcet-C, 3-4Br-Ph-C, 4-CN-7D-C, 4-Me-7-Ph-C and 6Br-3-D-C) against ischemia/reperfusion injury as a therapeutic alternative for heart failure. In addition, the biological activity of the coumarin derivative 4-Me-7-Ph-C on left ventricular pressure (LVP) was determined in the absence or presence of ouabain and nifedipine at a dose of 1 nM using an isolated rat heart model. The results showed that i) the coumarin derivative 4-Me-7-Ph-C significantly decreased the infarct area (p+=+0.05) compared with 3BrAcet-C, 3-4Br-Ph-C, 4-CN-7D-C, and 6Br-3-D-C; and ii) 4-Me-7-Ph-C increased LVP in a dose-dependent manner, which effect was inhibited by nifedipine. These data suggest that coumarin 4-Me-7-Ph-C may act as a type-L calcium channel activator, so it could be a good agent to treat heart failure.
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Affiliation(s)
- Lauro Figueroa-Valverde
- Laboratory of Pharmaco-Chemistry, Faculty of Chemical Biological Sciences, University Autonomous of Campeche, Campeche, Camp., Mexico
| | | | | | | | - Virginia Mateu-Armand
- Faculty of Nutrition, Universidad Veracruzana, Unidad del Bosque Xalapa Veracruz, Mexico
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Figueroa-Valverde L, Rosas-Nexticapa M, Alvarez-Ramirez M, López-Ramos M, Díaz-Cedillo F, Mateu-Armad MV. Evaluation of Biological Activity Exerted by Dibenzo[b,e]Thiophene-11(6H)-One on Left Ventricular Pressure Using an Isolated Rat Heart Model. Drug Res (Stuttg) 2023. [PMID: 36858071 DOI: 10.1055/a-1995-6351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
Abstract
BACKGROUND Some studies show that some Dibenzo derivatives can produce changes in the cardiovascular system; however, its molecular mechanism is not very clear. OBJECTIVE The objective of this investigation was to evaluate the inotropic activity of ten Dibenzo derivatives (compounds 1 to 10) on either perfusion pressure or left ventricular pressure. METHODS Biological activity produced by the Dibenzo derivatives on either perfusion pressure or coronary resistance was evaluated using an isolated rat heart. In addition, the molecular mechanism of biological activity produced by compound 4 (Dibenzo[b,e]thiophene-11(6H)-one) on left ventricular pressure was determined using both Bay-k8644 and nifedipine as pharmacological tools in an isolated rat heart model. RESULTS The results showed that Dibenzo[b,e]thiophene-11(6H)-one increases perfusion pressure and coronary resistance at a dose of 0.001 nM. Besides, other data display that Dibenzo[b,e]thiophene-11(6H)-one increases left ventricular pressure in a dose-dependent manner (0.001 to 100 nM) and this effect was similar to biological activity produced by Bay-k8644 drug on left ventricular pressure. However, the effect exerted by Dibenzo[b,e]thiophene-11(6H)-one was inhibited in the presence of nifedipine at a dose of 1 nM. CONCLUSIONS All these data suggest that Dibenzo[b,e]thiophene-11(6H)-one increase left ventricular pressure through calcium channel activation. In this way, Dibenzo[b,e]thiophene-11(6H)-one could be a good candidate as positive inotropic agent to heart failure.
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Affiliation(s)
- Lauro Figueroa-Valverde
- Laboratory of Pharmaco-Chemistry, Faculty of Chemical Biological Sciences, University Autonomous of Campeche, Campeche, Camp., México
| | - Marcela Rosas-Nexticapa
- Facultad de Nutrición, Universidad Veracruzana, Médicos y Odontologos, Unidad del Bosque Xalapa Veracruz, México
| | - Magdalena Alvarez-Ramirez
- Facultad de Nutrición, Universidad Veracruzana, Médicos y Odontologos, Unidad del Bosque Xalapa Veracruz, México
| | - Maria López-Ramos
- Laboratory of Pharmaco-Chemistry, Faculty of Chemical Biological Sciences, University Autonomous of Campeche, Campeche, Camp., México
| | - Francisco Díaz-Cedillo
- Escuela Nacional de Ciencias Biológicas del Instituto Politécnico Nacional. Santo Tomas, México
| | - Maria Virginia Mateu-Armad
- Facultad de Nutrición, Universidad Veracruzana, Médicos y Odontologos, Unidad del Bosque Xalapa Veracruz, México
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G-Protein-Coupled Estrogen Receptor Expression in Rat Uterine Artery Is Increased by Pregnancy and Induces Dilation in a Ca2+ and ERK1/2 Dependent Manner. Int J Mol Sci 2022; 23:ijms23115996. [PMID: 35682675 PMCID: PMC9180712 DOI: 10.3390/ijms23115996] [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: 04/26/2022] [Revised: 05/23/2022] [Accepted: 05/23/2022] [Indexed: 02/04/2023] Open
Abstract
Increasing levels of estrogens across gestation are partly responsible for the physiological adaptations of the maternal vasculature to pregnancy. The G protein-coupled estrogen receptor (GPER) mediates acute vasorelaxing effects in the uterine vasculature, which may contribute to the regulation of uteroplacental blood flow. The aim of this study was to investigate whether GPER expression and vasorelaxation may occur following pregnancy. Elucidation of the functional signalling involved was also investigated. Radial uterine and third-order mesenteric arteries were isolated from non-pregnant (NP) and pregnant rats (P). GPER mRNA levels were determined and—concentration–response curve to the GPER-specific agonist, G1 (10−10–10−6 M), was assessed in arteries pre-constricted with phenylephrine. In uterine arteries, GPER mRNA expression was significantly increased and vasorelaxation to G1 was significantly enhanced in P compared with NP rats. Meanwhile, in mesenteric arteries, there was a similar order of magnitude in NP and P rats. Inhibition of L-type calcium channels and extracellular signal-regulated kinases 1/2 significantly reduced vasorelaxation triggered by G1 in uterine arteries. Increased GPER expression and GPER-mediated vasorelaxation are associated with the advancement of gestation in uterine arteries. The modulation of GPER is exclusive to uterine arteries, thus suggesting a physiological contribution of GPER toward the regulation of uteroplacental blood flow during pregnancy.
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Rouver WDN, Ferreira CRS, Delgado NTB, Santos RLD. Surgically induced deficiency of sex hormones modulates coronary vasodilation by estradiol in hypertension. J Basic Clin Physiol Pharmacol 2020; 32:215-223. [PMID: 34005843 DOI: 10.1515/jbcpp-2020-0042] [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: 02/07/2020] [Accepted: 10/30/2020] [Indexed: 11/15/2022]
Abstract
OBJECTIVES The effect of oestrogen in hormonal dysfunction is not clear, especially in the coronary vascular bed. This study aimed at estradiol action (E2) in the coronary vascular bed from sham-operated and gonadectomized female and male spontaneously hypertensive rats (SHRs). METHODS Male and female SHRs had their mean arterial pressure (MAP) and baseline coronary perfusion pressure (CPP) determined. The effects of E2 (10 μM) were evaluated in isolated hearts by in bolus infusion before and after endothelium denudation (0.25 μM sodium deoxycholate) or perfusion with 100 μM NG-nitro-l-arginine methyl ester (L-NAME), 2.8 μM indomethacin, 0.75 μM clotrimazole, L-NAME after endothelium denudation, L-NAME plus indomethacin, or 4 mM tetraethylammonium (TEA). RESULTS MAP was higher in males than in females, with gonadectomy increasing in females and reducing in males. CPP was higher in female group, remaining unaltered after gonadectomy. E2-induced vasorelaxation was observed in all groups, with no differences having been found between sexes even after gonadectomy. Perfusion with TEA, L-NAME, L-NAME plus indomethacin, and L-NAME after endothelium removal attenuated the relaxing response in all groups. Clotrimazole inhibited vasorelaxation only in female groups, and indomethacin did so only in gonadectomized groups. Endothelium participation was confirmed in female groups and in the gonadectomized male group. CONCLUSIONS Our results indicated that the vasodilator effect of E2 was mediated by an indirect mechanism - via endothelium - as well as by direct action - via vascular smooth muscle - in both groups. The characterization of these mechanisms in coronary arteries might shed light on the functional basis of hormonal dysfunction symptoms in hypertension.
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Affiliation(s)
- Wender do Nascimento Rouver
- Department of Physiological Science, Federal University of Espirito Santo - UFES, Vitoria, Espirito Santo, Brazil
| | | | | | - Roger Lyrio Dos Santos
- Department of Physiological Science, Federal University of Espirito Santo - UFES, Vitoria, Espirito Santo, Brazil
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Cunha TRD, Giesen JAS, Rouver WN, Costa ED, Grando MD, Lemos VS, Bendhack LM, Santos RLD. Effects of progesterone treatment on endothelium-dependent coronary relaxation in ovariectomized rats. Life Sci 2020; 247:117391. [PMID: 32017871 DOI: 10.1016/j.lfs.2020.117391] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 01/22/2020] [Accepted: 01/30/2020] [Indexed: 12/24/2022]
Abstract
AIM Although progesterone (P4) has a beneficial effect on the cardiovascular system, P4 actions on the coronary bed have not yet been fully elucidated. This study evaluated the effect of progesterone treatment on endothelium-dependent coronary vascular reactivity in Wistar rats. MAIN METHODS Eight-week-old adult rats were divided into Sham, Ovariectomized (OVX), Ovariectomized and progesterone treated (OVX P4). The OVX P4 group received daily doses of progesterone (2 mg/kg/day). Vascular reactivity was assessed by a modified Langendorff technique. The intensity of eNOS, Akt, and gp91phox protein expression was quantified by Western blotting. Superoxide anion (O2●-) and hydrogen peroxide (H2O2) production was measured by dihydroethidium and 2',7'-dichlorofluorescein, respectively. KEY FINDINGS Treatment with P4 was able to prevent the reduction in baseline coronary perfusion pressure induced by ovariectomy. We observed that endothelium-dependent coronary vasodilation was reduced in the OVX group and potentiated in the OVX P4 group. Following the inhibition of the nitric oxide (NO) pathway, the bradykinin-induced relaxing response was potentiated in the OVX P4 group. With regard to the combined inhibition of NO and prostanoids pathways, the OVX P4 group showed a greater relaxing response, similar to what was found upon individual inhibition of NO. After the combined inhibition of NO, prostanoids and epoxyeicosatrienoic acids' pathways, the vasodilatory response induced by BK was abolished in all groups. SIGNIFICANCE Treatment with P4 prevented oxidative stress induced by ovariectomy. These results suggest that progesterone has a beneficial action on the coronary vascular bed.
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Affiliation(s)
- Tagana Rosa da Cunha
- Department of Physiological Sciences, Health Sciences Center, Federal University of Espirito Santo, Vitoria, ES, Brazil
| | | | - Wender Nascimento Rouver
- Department of Physiological Sciences, Health Sciences Center, Federal University of Espirito Santo, Vitoria, ES, Brazil
| | - Eduardo Damasceno Costa
- Department of Physiology and Biophysics, Biological Sciences Institute, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Marcella Daruge Grando
- Faculty of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Virgínia Soares Lemos
- Department of Physiology and Biophysics, Biological Sciences Institute, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Lusiane Maria Bendhack
- Faculty of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Roger Lyrio Dos Santos
- Department of Physiological Sciences, Health Sciences Center, Federal University of Espirito Santo, Vitoria, ES, Brazil.
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Lauro FV, Francisco DC, Marcela RN, Virginia MA, Alejandra GEE, Maria LR, Lenin HH, Yaritza BB, Jhair CT. Synthesis and Biological Activity of a Bis-steroid-Methanocyclobutanaphthalene- dione Derivative against Ischemia/Reperfusion Injury via Calcium Channel Activation. Antiinflamm Antiallergy Agents Med Chem 2019; 19:393-412. [PMID: 31580254 PMCID: PMC7579317 DOI: 10.2174/1871523018666191003152854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2019] [Revised: 08/12/2019] [Accepted: 08/20/2019] [Indexed: 11/22/2022]
Abstract
BACKGROUND There is some experimental data on the effect exerted by some steroid derivatives against ischemia/reperfusion injury; however, the molecular mechanism is very confusing, perhaps this phenomenon could be due to the protocols used and/or differences in the chemical structure of each one of the steroid derivatives. OBJECTIVES The aim of this study was to synthesize a new bis-steroid-methanocyclobutanaphthalene- dione derivative using some tools chemical. METHODOLOGY The biological activity exerted by the bis-steroid-methanocyclobutanaphthalene- dione derivative against ischemia/reperfusion injury was evaluated in an isolated heart model using noradrenaline, milrinone, dobutamine, levosimendan, and Bay-K- 8644 as controls. In addition, other alternative experiments were carried out to evaluate the biological activity induced by the bis-steroid-methanocyclobuta-naphthalene-dione derivative against left ventricular pressure in the absence or presence of nifedipine. RESULTS The results showed that 1) the bis-steroid-methanocyclobuta-naphthalene-dione derivative significantly decreases the ischemia-reperfusion injury translated as a decrease in the the infarct area in a similar manner to levosimendan drug; 2) both bis-steroidmethanocyclobuta- naphthalene-dione and Bay-K-8644 increase the left ventricular pressure and 3) the biological activity exerted by bis-steroid-methanocyclobuta-naphthalenedione derivative against left ventricular pressure is inhibited by nifedipine. CONCLUSION In conclusion, the bis-steroid-methanocyclobuta-naphthalene-dione derivative decreases the area of infarction and increases left ventricle pressure via calcium channels activation; this phenomenon could constitute a new therapy for ischemia/reperfusion injury.
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Affiliation(s)
- Figueroa-Valverde Lauro
- Laboratory of Pharmaco-Chemistry at the Faculty of Chemical Biological Sciences of the University Autonomous of Campeche, Av. Agustin Melgar s/n, Col Buenavista C.P.24039 Campeche Cam., Mexico
| | - Diaz-Cedillo Francisco
- Escuela Nacional de Ciencias Biologicas del Instituto Politecnico Nacional, Prol, Carpio y Plan de Ayala s/n Col. Santo Tomas, D.F. C.P. 11340, Mexico
| | - Rosas-Nexticapa Marcela
- Facultad de Nutricion, Universidad Veracruzana, Medicos y Odontologos s/n, 91010, Xalapa, Veracruz, Mexico
| | - Mateu-Armand Virginia
- Facultad de Nutricion, Universidad Veracruzana, Medicos y Odontologos s/n, 91010, Xalapa, Veracruz, Mexico
| | | | - Lopez-Ramos Maria
- Laboratory of Pharmaco-Chemistry at the Faculty of Chemical Biological Sciences of the University Autonomous of Campeche, Av. Agustin Melgar s/n, Col Buenavista C.P.24039 Campeche Cam., Mexico
| | - Hau-Heredia Lenin
- Laboratory of Pharmaco-Chemistry at the Faculty of Chemical Biological Sciences of the University Autonomous of Campeche, Av. Agustin Melgar s/n, Col Buenavista C.P.24039 Campeche Cam., Mexico
| | - Borges-Ballote Yaritza
- Laboratory of Pharmaco-Chemistry at the Faculty of Chemical Biological Sciences of the University Autonomous of Campeche, Av. Agustin Melgar s/n, Col Buenavista C.P.24039 Campeche Cam., Mexico
| | - Cabrera-Tuz Jhair
- Laboratory of Pharmaco-Chemistry at the Faculty of Chemical Biological Sciences of the University Autonomous of Campeche, Av. Agustin Melgar s/n, Col Buenavista C.P.24039 Campeche Cam., Mexico
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Machuki J, Zhang H, Harding S, Sun H. Molecular pathways of oestrogen receptors and β-adrenergic receptors in cardiac cells: Recognition of their similarities, interactions and therapeutic value. Acta Physiol (Oxf) 2018; 222. [PMID: 28994249 PMCID: PMC5813217 DOI: 10.1111/apha.12978] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Revised: 09/07/2017] [Accepted: 10/02/2017] [Indexed: 12/18/2022]
Abstract
Oestrogen receptors (ERs) and β-adrenergic receptors (βARs) play important roles in the cardiovascular system. Moreover, these receptors are expressed in cardiac myocytes and vascular tissues. Numerous experimental observations support the hypothesis that similarities and interactions exist between the signalling pathways of ERs (ERα, ERβ and GPR30) and βARs (β1 AR, β2 AR and β3 AR). The recently discovered oestrogen receptor GPR30 shares structural features with the βARs, and this forms the basis for the interactions and functional overlap. GPR30 possesses protein kinase A (PKA) phosphorylation sites and PDZ binding motifs and interacts with A-kinase anchoring protein 5 (AKAP5), all of which enable its interaction with the βAR pathways. The interactions between ERs and βARs occur downstream of the G-protein-coupled receptor, through the Gαs and Gαi proteins. This review presents an up-to-date description of ERs and βARs and demonstrates functional synergism and interactions among these receptors in cardiac cells. We explore their signalling cascades and the mechanisms that orchestrate their interactions and propose new perspectives on the signalling patterns for the GPR30 based on its structural resemblance to the βARs. In addition, we explore the relevance of these interactions to cell physiology, drugs (especially β-blockers and calcium channel blockers) and cardioprotection. Furthermore, a receptor-independent mechanism for oestrogen and its influence on the expression of βARs and calcium-handling proteins are discussed. Finally, we highlight promising therapeutic avenues that can be derived from the shared pathways, especially the phosphatidylinositol-3-OH kinase (PI3K/Akt) pathway.
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Affiliation(s)
- J.O. Machuki
- Department of Physiology; Xuzhou Medical University; Xuzhou China
| | - H.Y. Zhang
- Department of Physiology; Xuzhou Medical University; Xuzhou China
| | - S.E. Harding
- National Heart and Lung Institute; Imperial College; London UK
| | - H. Sun
- Department of Physiology; Xuzhou Medical University; Xuzhou China
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Debortoli AR, Rouver WDN, Delgado NTB, Mengal V, Claudio ERG, Pernomian L, Bendhack LM, Moysés MR, Santos RLD. GPER modulates tone and coronary vascular reactivity in male and female rats. J Mol Endocrinol 2017; 59:171-180. [PMID: 28733475 DOI: 10.1530/jme-16-0117] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Accepted: 06/23/2017] [Indexed: 12/11/2022]
Abstract
Compared with age-matched men, premenopausal women are largely protected from coronary artery disease, a difference that is lost after menopause. The effects of oestrogens are mediated by the activation of nuclear receptors (ERα and ERβ) and by the G protein-coupled oestrogen receptor (GPER). This study aims to evaluate the potential role of GPER in coronary circulation in female and male rats. The baseline coronary perfusion pressure (CPP) and the concentration-response curve with a GPER agonist (G-1) were evaluated in isolated hearts before and after the blockade of GPER. GPER, superoxide dismutase (SOD-2), catalase and gp91phox protein expression were assessed by Western blotting. Superoxide production was evaluated 'in situ' via dihydroethidium fluorescence (DHE). GPER blockade significantly increased the CPP in both groups, demonstrating the modulation of coronary tone by GPER. G-1 causes relaxation of the coronary bed in a concentration-dependent manner and was significantly higher in female rats. No differences were detected in GPER, SOD-2 and catalase protein expression. However, gp91phox expression and DHE fluorescence were higher in male rats, indicating elevated superoxide production. Therefore, GPER plays an important role in modulating coronary tone and reactivity in female and male rats. The observed differences in vascular reactivity may be related to the higher superoxide production in male rats. These findings help to elucidate the role of GPER-modulating coronary circulation, providing new information to develop a potential therapeutic target for the treatment of coronary heart disease.
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Affiliation(s)
- Angelina Rafaela Debortoli
- Department of Physiological SciencesHealth Sciences Center, Federal University of Espirito Santo, Vitoria, Brazil
| | - Wender do Nascimento Rouver
- Department of Physiological SciencesHealth Sciences Center, Federal University of Espirito Santo, Vitoria, Brazil
| | | | - Vinicius Mengal
- Department of Physiological SciencesHealth Sciences Center, Federal University of Espirito Santo, Vitoria, Brazil
| | | | - Laena Pernomian
- Department of Physics and ChemistryFaculty of Pharmaceutical Sciences from Ribeirão Preto, University of São Paulo, São Paulo, Brazil
| | - Lusiane Maria Bendhack
- Department of Physics and ChemistryFaculty of Pharmaceutical Sciences from Ribeirão Preto, University of São Paulo, São Paulo, Brazil
| | - Margareth Ribeiro Moysés
- Department of Physiological SciencesHealth Sciences Center, Federal University of Espirito Santo, Vitoria, Brazil
| | - Roger Lyrio Dos Santos
- Department of Physiological SciencesHealth Sciences Center, Federal University of Espirito Santo, Vitoria, Brazil
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Santos RL, Lima JT, Rouver WN, Moysés MR. Deficiency of sex hormones does not affect 17-ß-estradiol-induced coronary vasodilation in the isolated rat heart. ACTA ACUST UNITED AC 2016; 49:e5058. [PMID: 27074167 PMCID: PMC4833220 DOI: 10.1590/1414-431x20165058] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Accepted: 02/04/2016] [Indexed: 11/22/2022]
Abstract
The relaxation of coronary arteries by estrogens in the coronary vascular beds of
naive and hypertensive rats has been well described. However, little is known about
this action in gonadectomized rats. We investigated the effect of 17-ß-estradiol (E2)
in coronary arteries from gonadectomized rats, as well as the contributions of
endothelium-derived factors and potassium channels. Eight-week-old female and male
Wistar rats weighing 220-300 g were divided into sham-operated and gonadectomized
groups (n=9−12 animals per group). The baseline coronary perfusion pressure (CPP) was
determined, and the vasoactive effects of 10 μM E2 were assessed by bolus
administration before and after endothelium denudation or by perfusion with
NG-nitro-L-arginine methyl ester (L-NAME), indomethacin, clotrimazole,
L-NAME plus indomethacin, L-NAME plus clotrimazole or tetraethylammonium (TEA). The
CPP differed significantly between the female and sham-operated male animals.
Gonadectomy reduced the CPP only in female rats. Differences in E2-induced relaxation
were observed between the female and male animals, but male castration did not alter
this response. For both sexes, the relaxation response to E2 was, at least partly,
endothelium-dependent. The response to E2 was reduced only in the sham-operated
female rats treated with L-NAME. However, in the presence of indomethacin,
clotrimazole, L-NAME plus indomethacin or L-NAME plus clotrimazole, or TEA, the E2
response was significantly reduced in all groups. These results highlight the
importance of prostacyclin, endothelium-derived hyperpolarizing factor, and potassium
channels in the relaxation response of coronary arteries to E2 in all groups, whereas
nitric oxide may have had an important role only in the sham-operated female
group.
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Affiliation(s)
- R L Santos
- Departamento de Ciências Fisiológicas Centro de Ciências da Saúde, Universidade Federal do Espírito Santo, Vitória, ES, Brasil
| | - J T Lima
- Departamento de Ciências Fisiológicas Centro de Ciências da Saúde, Universidade Federal do Espírito Santo, Vitória, ES, Brasil
| | - W N Rouver
- Departamento de Ciências Fisiológicas Centro de Ciências da Saúde, Universidade Federal do Espírito Santo, Vitória, ES, Brasil
| | - M R Moysés
- Departamento de Ciências Fisiológicas Centro de Ciências da Saúde, Universidade Federal do Espírito Santo, Vitória, ES, Brasil
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Vignon-Zellweger N, Relle K, Rahnenführer J, Schwab K, Hocher B, Theuring F. Endothelin-1 overexpression and endothelial nitric oxide synthase knock-out induce different pathological responses in the heart of male and female mice. Life Sci 2014; 118:219-25. [DOI: 10.1016/j.lfs.2013.12.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2013] [Revised: 11/23/2013] [Accepted: 12/04/2013] [Indexed: 01/08/2023]
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Figueroa-Valverde L, Díaz-Cedillo F, García-Cervera E, Pool Gómez E, López-Ramos M, Rosas-Nexticapa M, Martinez-Camacho R. Positive inotropic activity induced by a dehydroisoandrosterone derivative in isolated rat heart model. Arch Pharm Res 2013; 36:1270-8. [PMID: 23821476 DOI: 10.1007/s12272-013-0166-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2012] [Accepted: 10/25/2012] [Indexed: 11/28/2022]
Abstract
Experimental studies indicate that some steroid derivatives have inotropic activity; nevertheless, there is scarce information about the effects of the dehydroisoandrosterone and its derivatives at cardiovascular level. In addition, to date the cellular site and mechanism of action of dehydroisoandrosterone at cardiovascular level is very confusing. In order, to clarify those phenomena in this study, a dehydroisoandrosterone derivative was synthesized with the objective of to evaluate its activity on perfusion pressure and coronary resistance and compare this phenomenon with the effect exerted by dehydroisoandrosterone. The Langendorff technique was used to measure changes on perfusion pressure and coronary resistance in an isolated rat heart model in absence or presence of dehydroisoandrosterone and its derivative. Additionally, to characterize the molecular mechanism involved in the inotropic activity induced by dehydroisoandrosterone derivative was evaluated by measuring left ventricular pressure in absence or presence of following compounds; flutamide, prazosin, metoprolol and nifedipine. The results showed that dehydroisoandrosterone derivative significantly increased the perfusion pressure and coronary resistance in comparison with the control conditions and dehydroisoandrosterone. Additionally, other data indicate that dehydroisoandrosterone derivative increase left ventricular pressure in a dose-dependent manner [1 × 10(-9)-1 × 10(-4) mmol]; nevertheless, this phenomenon was significantly inhibited by nifedipine at a dose of 1 × 10(-6) mmol. In conclusion, these data suggest that dehydroisoandrosterone derivative induces positive inotropic activity through of activation the L-type calcium channel.
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Affiliation(s)
- L Figueroa-Valverde
- Laboratory of Pharmaco-Chemistry at the Faculty of Chemical Biological Sciences of the University Autonomic of Campeche, Av. Agustín Melgar s/n, C.P. 24039, Col. Buenavista, CAM, Mexico,
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Fatty Acid Oxidation and Cardiovascular Risk during Menopause: A Mitochondrial Connection? J Lipids 2012; 2012:365798. [PMID: 22496981 PMCID: PMC3306973 DOI: 10.1155/2012/365798] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2011] [Accepted: 10/17/2011] [Indexed: 01/16/2023] Open
Abstract
Menopause is a consequence of the normal aging process in women. This fact implies that the physiological and biochemical alterations resulting from menopause often blur with those from the aging process. It is thought that menopause in women presents a higher risk for cardiovascular disease although the precise mechanism is still under discussion. The postmenopause lipid profile is clearly altered, which can present a risk factor for cardiovascular disease. Due to the role of mitochondria in fatty acid oxidation, alterations of the lipid profile in the menopausal women will also influence mitochondrial fatty acid oxidation fluxes in several organs. In this paper, we propose that alterations of mitochondrial bioenergetics in the heart, consequence from normal aging and/or from the menopausal process, result in decreased fatty acid oxidation and accumulation of fatty acid intermediates in the cardiomyocyte cytosol, resulting in lipotoxicity and increasing the cardiovascular risk in the menopausal women.
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