23 research outputs found
Atividade antimicrobiana de subfrações padronizadas da planta Arrabidaea chica Verl.
Este estudo analisou o potencial terapêutico de extratos e subfrações padronizadas da planta amazônica Arrabidaea chica, visando seu uso tópico como medicamento e eficácia comprovada em doenças cutâneas
Urinary Biotinidase and Alanine Excretion in Patients with Insulin-Dependent Diabetes Mellitus
Peer Reviewe
Aberrant splicing and missense mutations cause steroid 21-hydroxylase [P-450(C21)] deficiency in humans: possible gene conversion products.
Inhibition of histamine-induced bronchospasm in guinea pigs treated with Cecropia glaziovi Sneth and correlation with the in vitro activity in tracheal muscles
A standardized aqueous extract (AE) and a purified fraction (BuF) of Cecropia glaziovi Sneth leaves were tested in unrestrained guinea pigs challenged with histamine. Changes of the respiratory pressure and rate were recorded in a whole body plethysmograph before and after treatment. the concentration of histamine necessary to produce bronchospasm was increased by five-fold following administration of AE (1.0 g/kg p.o.), and by two-fold after treatment with the semi-purified procyanidin/flavonoids enriched BuF (0.1 g/kg p.o.). Both effects were blocked by previous treatment with propranolol (10.0 mg/kg i.p.). in vitro incubation of BuF (0.1-1.0 mg/ml) decreased by 13-55% the maximal response of guinea pig tracheal muscle to histamine, without significant change of EC50. the results confirmed old reports on the useful pulmonary effects of Cecropia extracts. the bronchodilation observed in vivo seems to be related to beta-adrenergic activity observed in vitro only with high concentrations of the purified extract. (C) 2007 Elsevier GmbH. All rights reserved.Universidade Federal de São Paulo, Dept Pharmacol, Nat Prod Sect, Escola Paulista Med, BR-04044020 São Paulo, BrazilUniversidade Federal de São Paulo, Dept Pharmacol, Nat Prod Sect, Escola Paulista Med, BR-04044020 São Paulo, BrazilWeb of Scienc