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1.
European J Med Plants ; 2022 Mar; 33(3): 8-17
Artigo | IMSEAR | ID: sea-219474

RESUMO

Aims: Propolis is a resinous substance accumulated by bees from resinous plants material, produced by different botanical processes. It has been used since ancient times for its therapeutic benefits. The chemical composition of propolis is mostly influenced by the geographic zone and also by botanic sources that the honey bee has used. In this sense, the aim of this study was to analyse the phytochemical profile and pharmacological activity of a sample of propolis from Ecuador. Methodology: Chemical composition was analyzed by using gas chromatography coupled to mass spectrometry (GC/MS). The anti-inflammatory activity was determined by ear edema induced by 12-O-tetradecanoylphorbol-13 acetate and antinociceptive activity was analyzed by using writhing test induced by acetic acid. Results: The chemical composition showed the presence of sugars, fatty acids, flavonoids and triterpenes in the sample. The analysis of the relative abundance of the detected signals suggested that triterpenes represent 25.38% of the total components of the mixture and 9,19-cyclo-9-beta-lanostane-24-on-3-beta-iloxyl (cycloartenol), the majority compound. Propolis induced a maximun inhibition (77.2 %) in TPA model at a dose of 3 mg/ear, reducing dermal edema, cellular infiltration and ear thickness induced by TPA. Also, it produced a dose-related inhibition of acetic acid-induced writhing response with a maximal antinociceptive effect (49.5%) at dose of 500 mg/kg po. Conclusion: The chemical analysis showed a predominant triterpene profile, being cycloartenol the majority compound in the sample and its anti-inflammatory and antinociceptive activities were confirmed by in vivo models.

2.
Acta physiol. pharmacol. ther. latinoam ; 43(3/4): 58-64, 1993. tab, graf
Artigo em Inglês | LILACS | ID: lil-144459

RESUMO

Los presentes experimentos han analizado: a) la Presión Arterial (PA) y la función renal en ratas un riñón-un clip (IRIC) dos semanas después de la estenosis arterial; b) efecto de la inhibición de la ciclooxigenasa (CO) sobre la PA y la regluación de la función renal durante el período hipertensivo. Se estudiaron tres grupos de ratas utilizando animales sin anestesia, con libertad de movimiento y crónicamente instrumentados: grupo "Sham" (con operación simulada), Clip 0.31mm de luz, Clip 0.29mm de luz. Los animales fueron examinados antes (período Control) y durante la infusión de indometacina (IND, 5 mg/Kg por la cánula aórtica, n = 11 en cada grupo). La efectiva inhibición de la CO por IND fue confirmada por la determinación de prostaglandín E2 (PGE) en orina. La PA Control (mmH, media ñ ES) difirió significativamente entre los grupos (P < 0.001): Sham, 114 ñ 3; Clip 0.31, l35 ñ 2; Clip 0.29, 154 ñ 4 y los valores no variaron la infusión de IND, sugiriendo que la participación de los eicosanoides derivados de la CO, particularmente la PGE2, en la regulación de la hemodinamia renal de las ratas sham e hipertensas no es significativa. La excreción de sodio fue menor en el período Control de las ratas Clip 0.29 (P<0.01). El significativo efecto natriurético observado en este grupo Clip 0.29 por la infusión de IND sugiere la contribución de um metabolito del AA para el manejo renal del sodio en la hipertensión renovascular más severa


Assuntos
Ratos , Animais , Masculino , Hipertensão Renovascular/fisiopatologia , Indometacina/farmacologia , Rim/fisiologia , Dinoprostona/urina , Hipertensão Renovascular/urina , Potássio/urina , Pressão Arterial , Sódio/urina , Taxa de Filtração Glomerular , Fatores de Tempo
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