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Ordoñez ME, Borges VS, Souza AC, Ferreira LR, Costa FM, Melo FP, Vale JK, Borges RS. Molecular modifications on β-nitro-styrene derivatives increase their antioxidant capacities. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Gonzaga-Costa K, Vasconcelos-Silva AA, Rodrigues-Silva MJ, Rebouça CDSM, Duarte GP, Borges RS, Magalhães PJC, Lahlou S. Soluble guanylate cyclase stimulator, trans-4-methoxy-β-nitrostyrene, has a beneficial effect in monocrotaline-induced pulmonary arterial hypertension in rats. Eur J Pharmacol 2021; 897:173948. [PMID: 33609564 DOI: 10.1016/j.ejphar.2021.173948] [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: 11/07/2020] [Revised: 01/28/2021] [Accepted: 02/10/2021] [Indexed: 10/22/2022]
Abstract
The soluble guanylate cyclase (sGC)/GMPc pathway plays an important role in controlling pulmonary arterial hypertension (PAH). We investigated whether the novel sGC stimulator trans-4-methoxy-β-nitrostyrene (T4MN), ameliorates monocrotaline (MCT)-induced PAH. At Day 0, rats were injected with MCT (60 mg/kg, s. c.). Control (CNT) rats received an equal volume of monocrotaline vehicle only (s.c.). Four weeks later, MCT-treated rats were orally treated for 14 days with T4MN (75 mg/kg/day) (MCT-T4MN group) or its vehicle (MCT-V group), and with sildenafil (SIL; 50 mg/kg) (MCT-SIL group). Compared to the CNT group, MCT treatment induced a significant increase in both the Fulton index and RV systolic pressure but significantly reduced the maximum relaxation induced by acetylcholine. Indeed, MCT treatment increased the wall thickness of small and larger pulmonary arterioles. Oral treatment with T4MN and SIL reduced the Fulton index and RV systolic pressure compared to the MCT-V group. Maximum relaxation induced by acetylcholine was significantly enhanced in MCT-SIL group. Both T4MN and SIL significantly reduced the enhanced wall thickness of small and larger pulmonary arterioles. Treatment with T4MN has a beneficial effect on PAH by reducing RV systolic pressure and consequently right ventricular hypertrophy, and by reducing pulmonary artery remodeling. T4MN may represent a new therapeutic or complementary approach for the treatment of PAH.
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Affiliation(s)
- Karoline Gonzaga-Costa
- Department of Physiology and Pharmacology, School of Medicine, Federal University of Ceará, CE, Brazil
| | | | | | | | - Glória Pinto Duarte
- Department of Physiology and Pharmacology, Federal University of Pernambuco, Recife, PE, Brazil
| | | | | | - Saad Lahlou
- Department of Physiology and Pharmacology, School of Medicine, Federal University of Ceará, CE, Brazil.
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Arruda‐Barbosa L, Vasconcelos‐Silva AA, Borges RS, Duarte GP, Magalhães PJC, Lahlou S. Vasodilatory action of
trans
‐4‐methoxy‐β‐nitrostyrene in rat isolated pulmonary artery. Clin Exp Pharmacol Physiol 2021; 48:717-725. [DOI: 10.1111/1440-1681.13467] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 09/28/2020] [Accepted: 01/07/2021] [Indexed: 01/12/2023]
Affiliation(s)
- Loeste Arruda‐Barbosa
- Department of Physiology and Pharmacology School of Medicine Federal University of Ceará Fortaleza Brazil
| | | | | | - Gloria Pinto Duarte
- Department of Physiology and Pharmacology Federal University of Pernambuco Recife Brazil
| | | | - Saad Lahlou
- Department of Physiology and Pharmacology School of Medicine Federal University of Ceará Fortaleza Brazil
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Alves-Santos TR, Silva OA, Moreira HS, Borges RS, Duarte GP, Magalhães PJC, Lahlou S. Cardiovascular Effects of Trans-4-Methoxy-β-Nitrostyrene in Spontaneously Hypertensive Rats: Comparison With Its Parent Drug β-Nitrostyrene. Front Pharmacol 2019; 10:1407. [PMID: 31849663 PMCID: PMC6895251 DOI: 10.3389/fphar.2019.01407] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2019] [Accepted: 11/05/2019] [Indexed: 01/16/2023] Open
Abstract
We previously reported that trans-4-methoxy-β-nitrostyrene (T4MN) evoked higher vasorelaxant effects in small resistance arteries from spontaneously hypertensive rats (SHRs) in comparison with its parent drug, the β-nitrostyrene 1-nitro-2-phenylethene (NPe). To further our knowledge of the influence of insertion of an electron-releasing group such as methoxy in the aromatic ring of NPe, we investigated the cardiovascular responses to intravenous (i.v.) injection of T4MN in SHRs and compared with those of NPe. In anesthetized SHRs, i.v. treatment with T4MN (0.03–0.5 mg/kg) and NPe (0.03–3 mg/kg) induced dose-dependent bradycardia and hypotension, which were biphasic (named phases 1 and 2). Magnitude of these responses was significantly higher for T4MN compared with NPe. Phase 1 cardiovascular responses to both T4MN (0.3 mg/kg) and NPe (3 mg/kg) were prevented by cervical bivagotomy or perineural treatment of both cervical vagus nerves with capsaicin, but was unchanged by i.v. pretreatment with capsazepine or ondansetron. After injection into the left ventricle, NPe and T4MN no longer evoked phase 1 responses. In conscious SHRs, NPe (3 mg/kg, i.v.), and T4MN (0.3 mg/kg, i.v.) evoked monophasic hypotensive and bradycardiac effects which were suppressed by i.v. pretreatment with methylatropine. It is concluded that i.v. administration of NPe and T4MN in SHRs induced a vago-vagal hypotensive and bradycardic reflex that did not involve the activation of vanilloid TRPV1 or 5-HT3 receptors located on vagal pulmonary sensory nerves. With respect to its parent drug, T4MN was more potent in inducing this reflex. Phase 2 hypotensive response to i.v. NPe and T4MN seems partially resulting from a direct vasodilatory action. It seems that insertion of a methoxy group into the aromatic ring stabilized NPe, which in turn increases its cardiovascular effects.
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Affiliation(s)
| | - Odair Alves Silva
- Department of Physiology and Pharmacology, Federal University of Pernambuco, Recife, Brazil
| | - Hicla Stefany Moreira
- Department of Physiology and Pharmacology, Federal University of Pernambuco, Recife, Brazil
| | | | - Gloria Pinto Duarte
- Department of Physiology and Pharmacology, Federal University of Pernambuco, Recife, Brazil
| | - Pedro Jorges Caldas Magalhães
- Laboratory of Cardiovascular Pharmacology, Department of Physiology, Pharmacology, School of Medicine, Federal University of Ceará, Fortaleza, Brazil
| | - Saad Lahlou
- Laboratory of Cardiovascular Pharmacology, Department of Physiology, Pharmacology, School of Medicine, Federal University of Ceará, Fortaleza, Brazil
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Mechanisms underlying the vasorelaxant effect of trans-4-methoxy-β-nitrostyrene in the rat mesenteric resistance arteries. Eur J Pharmacol 2019; 853:201-209. [DOI: 10.1016/j.ejphar.2019.01.058] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Revised: 01/29/2019] [Accepted: 01/31/2019] [Indexed: 12/13/2022]
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Vasconcelos TB, Ribeiro‐Filho HV, Carvalho EF, Brito TS, Lahlou S, Magalhães PJC. Endothelium‐dependent and endothelium‐independent effects of 1‐nitro‐2‐propylbenzene on rat aorta. Fundam Clin Pharmacol 2019; 33:612-620. [DOI: 10.1111/fcp.12475] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Revised: 03/22/2019] [Accepted: 04/18/2019] [Indexed: 11/25/2022]
Affiliation(s)
| | | | | | | | - Saad Lahlou
- Department of Physiology and Pharmacology Federal University of Ceará Fortaleza Brazil
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Stimulation of pulmonary vagal C-fibers by trans-4-methyl-β-nitrostyrene induces bradycardiac and depressor reflex in rats: Role of vanilloid TRPV 1 receptors. Eur J Pharmacol 2019; 849:154-159. [PMID: 30716310 DOI: 10.1016/j.ejphar.2019.01.063] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 01/28/2019] [Accepted: 01/31/2019] [Indexed: 12/19/2022]
Abstract
Previously, we showed that the synthetic nitroderivative trans-4-methyl-β-nitrostyrene (T4MeN) induced vasorelaxant effects in rat isolated aortic rings. Here, we investigated the mechanisms underlying the cardiovascular effects of T4MeN in normotensive rats. In pentobarbital-anesthetized rats, intravenous (i.v.) injection of T4MeN (0.03-0.5 mg/kg) induced a rapid (onset time of 1-2 s) and dose-dependent bradycardia and hypotension. These cardiovascular responses to T4MeN were abolished by bilateral cervical vagotomy or selective blockade of neural conduction of vagal C-fiber afferents by perineural treatment of both cervical vagus nerves with capsaicin. Hypotension and bradycardia were also recorded when T4MeN was directly injected in the right, but not into the left ventricle. Furthermore, they were significantly reduced by i.v. pretreatment with capsazepine but remained unaltered by ondansetron or suramin. In conscious rats, the dose-dependent hypotension and bradycardia evoked by T4MeN were abolished by i.v. methylatropine pretreatment. In conclusion, bradycardiac and depressor responses induced by T4MeN has a vago-vagal reflex origin resulting from the vagal pulmonary afferents stimulation. The transduction mechanism seems to involve the activation of vanilloid TRPV1, but not purinergic (P2X) or 5-HT3 receptors located on vagal pulmonary sensory nerves.
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Kadioglu M, Kaya Yasar Y, Barut EN, Engin S. Trimebutine maleate relaxes the isolated rat thoracic aorta: The role of nitric oxide and L-type calcium channels. Clin Exp Pharmacol Physiol 2019; 46:322-328. [PMID: 30484889 DOI: 10.1111/1440-1681.13051] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Revised: 09/26/2018] [Accepted: 11/17/2018] [Indexed: 01/10/2023]
Abstract
Trimebutine maleate (TMB), a widely prescribed drug for functional gastrointestinal disorders, has been reported to regulate smooth muscle contractility by modulating multiple ion channel activities in the gastrointestinal tract. However, its action on isolated aorta has not yet been reported. The aim of the present study was to evaluate in vitro vasorelaxant properties and the underlying pharmacological mechanisms of TMB in isolated rat thoracic aortic rings. Vascular activity experiments were performed on thoracic aorta isolated from Sprague-Dawley rats in vitro, including endothelium-intact and endothelium-denuded aortic rings. TMB (10-10 -10-5 mol/L) induced relaxation in endothelium-intact aortic rings precontracted by phenylephrine with a potency similar to that of carbachol. TMB-induced relaxation was not altered by glibenclamide and atropine in endothelium-intact aortic rings. However, L-NAME and endothelium denudation significantly reduced but not completely reversed the vasorelaxant effect of TMB. Also, TMB-induced relaxation wasn't affected by diclofenac in endothelium-intact aortic rings. TMB at 10-5 mol/L significantly reduced the CaCl2 -induced contractions in endothelium-intact aortic rings stimulated with KCl, but not stimulated with phenylephrine under Ca2+ free conditions. Moreover, TMB at 10-5 mol/L effectively attenuated Bay-K8644-induced contractions in aortic rings. These results suggest that TMB-induced relaxation was mediated by both endothelium-dependent and endothelium-independent manner in isolated rat thoracic aorta. The mechanism of TMB-induced relaxation at low concentrations is partially related to NO- and endothelium-dependent but unrelated to prostanoids formation. However, inhibition of Ca2+ influx through voltage-operated calcium channels and L-type Ca2+ channel blocking effect appears to be involved in the mechanism of vasorelaxant effect of TMB at high concentrations.
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Affiliation(s)
- Mine Kadioglu
- Department of Pharmacology, Faculty of Medicine, Karadeniz Technical University, Trabzon, Turkey
| | - Yesim Kaya Yasar
- Department of Pharmacology, Faculty of Pharmacy, Karadeniz Technical University, Trabzon, Turkey
| | - Elif Nur Barut
- Department of Pharmacology, Faculty of Pharmacy, Karadeniz Technical University, Trabzon, Turkey
| | - Seckin Engin
- Department of Pharmacology, Faculty of Pharmacy, Karadeniz Technical University, Trabzon, Turkey
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