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| Guedes,D.N.; Silva,D.F.; Barbosa-Filho,J.M.; Medeiros,I.A.. |
| The vasorelaxing activity of rotundifolone (ROT), a major constituent (63.5%) of the essential oil of Mentha x villosa, was tested in male Wistar rats (300-350 g). In isolated rat aortic rings, increasing ROT concentrations (0.3, 1, 10, 100, 300, and 500 µg/ml) inhibited the contractile effects of 1 µM phenylephrine and of 80 or 30 mM KCl (IC50 values, reported as means ± SEM = 184 ± 6, 185 ± 3 and 188 ± 19 µg/ml, N = 6, respectively). In aortic rings pre-contracted with 1 µM phenylephrine, the smooth muscle-relaxant activity of ROT was inhibited by removal of the vascular endothelium (IC50 value = 235 ± 7 µg/ml, N = 6). Furthermore, ROT inhibited (pD2 = 6.04, N = 6) the CaCl2-induced contraction in depolarizing medium in a concentration-dependent manner.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ca2+ mobilization; Rat aortic rings; Rotundifolone; Vasorelaxation; Mentha x villosa. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004001200014 |
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| Ameer,O.Z.; Salman,I.M.; Siddiqui,M.J.A.; Yam,M.F.; Sriramaneni,R.N.; Sadikun,A.; Ismail,Z.; Shah,A.M.; Asmawi,M.Z.. |
| We investigated the vascular responses and the blood pressure reducing effects of different fractions obtained from the methanol extract of Loranthus ferrugineus Roxb. (F. Loranthaceae). By means of solvent-solvent extraction, L. ferrugineus methanol extract (LFME) was successively fractionated with chloroform, ethyl acetate and n-butanol. The ability of these LFME fractions to relax vascular smooth muscle against phenylephrine (PE)- and KCl-induced contractions in isolated rat aortic rings was determined. In another set of experiments, LFME fractions were tested for blood pressure lowering activity in anesthetized adult male Sprague-Dawley rats (250-300 g, 14-18 weeks). The n-butanol fraction of LFME (NBF-LFME) produced a significant... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Loranthus ferrugineus; N-butanol fraction; Cardiovascular effect; Aortic ring; Vasorelaxation; Terpenoid. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2010000200009 |
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| Lozano-Cuenca,J.; Valencia-Hernández,I.; López-Canales,O.A.; Flores-Herrera,H.; López-Mayorga,R.M.; Castillo-Henkel,E.F.; López-Canales,J.S.. |
| Metabolic syndrome is a multifaceted condition associated with a greater risk of various disorders (e.g., diabetes and heart disease). In a rat model of metabolic syndrome, an acute in vitro application of rosuvastatin causes relaxation of aortic rings. Since the outcome of a subchronic rosuvastatin treatment is unknown, the present study explored its effect on acetylcholine-induced vasorelaxation of aortic rings from rats with metabolic syndrome. Animals were submitted to a 16-week treatment, including a standard diet, a cafeteria-style diet (CAF-diet), or a CAF-diet with daily rosuvastatin treatment (10 mg/kg). After confirming the development of metabolic syndrome in rats, aortic segments were extracted from these animals (those treated with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rosuvastatin; Metabolic syndrome; Rat aorta; Vasorelaxation; NO; K+ channel. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2020000200607 |
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| Lozano-Cuenca,J.; González-Hernández,A.; López-Canales,O.A.; Villagrana-Zesati,J.R.; Rodríguez-Choreão,J.D.; Morín-Zaragoza,R.; Castillo-Henkel,E.F.; López-Canales,J.S.. |
| Clobenzorex is a metabolic precursor of amphetamine indicated for the treatment of obesity. Amphetamines have been involved with cardiovascular side effects such as hypertension and pulmonary arterial hypertension. The aim of the present study was to investigate whether the direct application of 10–9–10–5 M clobenzorex on isolated phenylephrine-precontracted rat aortic rings produces vascular effects, and if so, what mechanisms may be involved. Clobenzorex produced an immediate concentration-dependent vasorelaxant effect at the higher concentrations (10–7.5–10–5 M). The present outcome was not modified by 10–6 M atropine (an antagonist of muscarinic acetylcholine receptors), 3.1×10–7 M glibenclamide (an ATP-sensitive K+ channel blocker), 10–3 M... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Clobenzorex; Rat aorta; Vasorelaxation; NO-cGMP; PKG pathway; K+ channels. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2017000900605 |
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