|
|
|
|
|
| López-Canales,J.S.; López-Sanchez,P.; Perez-Alvarez,V.M.; Wens-Flores,I.; Polanco,A.C.; Castillo-Henkel,E.; Castillo-Henkel,C.. |
| The relaxant effect of the methyl ester of rosuvastatin was evaluated on aortic rings from male Wistar rats (250-300 g, 6 rats for each experimental group) with and without endothelium precontracted with 1.0 µM phenylephrine. The methyl ester presented a slightly greater potency than rosuvastatin in relaxing aortic rings, with log IC50 values of -6.88 and -6.07 M, respectively. Unlike rosuvastatin, the effect of its methyl ester was endothelium-independent. Pretreatment with 10 µM indomethacin did not inhibit, and pretreatment with 1 mM mevalonate only modestly inhibited the relaxant effect of the methyl ester. Nω-nitro-L-arginine methyl ester (L-NAME, 10 µM), the selective nitric oxide-2 (NO-2) inhibitor 1400 W (10 µM), tetraethylammonium (TEA, 10 mM),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rat aorta; Rosuvastatin methyl ester; Endothelium-independent relaxation; Potassium channels; NOS-2. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2011000500009 |
| |
|
|
| López-Canales,O.A.; Castillo-Hernandez,M.C.; Vargas-Robles,H.; Rios,A.; López-Canales,J.S.; Escalante,B.. |
| Beta-adrenergic receptor (βAR)-dependent blood vessel relaxation is impaired in older animals and G protein activation has been suggested as the causative mechanism. Here, we investigated the role of βAR subtypes (β1AR, β2AR, and β3AR) and cAMP in maturation-dependent vasorelaxation impairment. Aortic rings from 15 Sprague-Dawley male rats (3 or 9 weeks old) were harvested and left intact or denuded of the endothelium. Vascular relaxation in aortic rings from younger and older groups was compared in the presence of βAR subtype agonists and antagonists along with cAMP and cGMP antagonists. Isolated aortic rings were used to evaluate relaxation responses, protein expression was evaluated by western blot or real time PCR, and metabolites were measured by... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Β adrenergic receptors; Vascular tissue; Adenyl cyclase. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2016000700605 |
| |
|
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
|
| López-Canales,J.S.; Lozano-Cuenca,J.; Muãoz-Islas,E.; Aguilar-Carrasco,J.C.; López-Canales,O.A.; López-Mayorga,R.M.; Castillo-Henkel,E.F.; Valencia-Hernández,I.; Castillo-Henkel,C.. |
| Amfepramone (diethylpropion) is an appetite-suppressant drug used for the treatment of overweight and obesity. It has been suggested that the systemic and central activity of amfepramone produces cardiovascular effects such as transient ischemic attacks and primary pulmonary hypertension. However, it is not known whether amfepramone produces immediate vascular effects when applied in vitro to rat aortic rings and, if so, what mechanisms may be involved. We analyzed the effect of amfepramone on phenylephrine-precontracted rat aortic rings with or without endothelium and the influence of inhibitors or blockers on this effect. Amfepramone produced a concentration-dependent vasorelaxation in phenylephrine-precontracted rat aortic rings that was not affected by... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cardiovascular pharmacology; Amfepramone; Obesity; Rat aorta; Nitric oxide; Potassium channels. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2015000600537 |
| |
|
|
|
