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Studies on the anti-asthmatic and antitussive properties of aqueous leaf extract of Bryophyllum pinnatum in rodent species

查看全文 作　　者：Edward O [1,2]Salami;Raymond I [1,2]Ozolua;Stephen O [1,2]Okpo;Gerald I [3]Eze;Dickson O [4]Uwaya 高影响力作者 机构地区：[1]Department of Pharmacology and Toxicology;[2]Faculty of Pharmacy,University of Benin;[3]Department of Anatomy,School of Basic Medical Sciences,University of Benin;[4]Department of Pharmacology and Toxicology,Faculty of Pharmacy,University of Benin高影响力机构 出　　处：《Asian Pacific Journal of Tropical Medicine》索引2013年第6卷第6期,共5页高影响力期刊 摘　　要：Objective:To evaluate the antiasthmatic and antitussive properties of the aqueous leaf extract of Bryophyilum pinnatum {B.pinnatum)(BP) Lam.Methods:Ovalbiunin-sensilized guinea pigs which were treated with BP for 21 consecutive days were exposed to 0.2%histamine aerosol in a glass chamber.Mucus viscosity,white blood cell and lymphocyte counts and tracheal wall morphometry were measured.Bouts of cough were counted pre and post acute exposure of extract-treated(X7 d) guinea pigs to 7.5%citric acid aerosol in a chamber.Phenol red expectoration was estimated in mice after 7 d of daily administration of BP.Results:Doses of 200 and 400 mg/kg/day(×21 d) BP significantly increased the time for guinea pigs to experience preconvulsive dyspnoea.BP and salbutamol(0.5 mg/kg/day×21 d) reduced mucus viscosity in the sensitized group to values comparable with controls.White blood cell,lymphocyte counts and tracheal morphometry were not significantly altered.Both doses of BP also significantly reduced the bouts of cough but only 400 mg/kg/day significantly inhibited the amount of phenol red secreted.Conclusions:BP has demonstrated antiasthmatic and antitussive properties in these rodent models.These properties may underscore its use in Nigerian ethnomedicine. 关 键 词：Bryophyllum pinnatum ANTIASTHMATIC ANTITUSSIVE AIRWAY HISTOLOGY
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