ABSTRACT
Ocimum selloi is an herbal species popularly used in Brazil as antispasmodic. Herein, we report the antispasmodic effect of O. selloi essential oil (OS) in segments of guinea-pig ileum. OS did not reduce the tonus of the ileum. In contrast, OS reduced the contraction induced by carbachol (100 µM), BaCl2 (0.03 M) and low- and high-K(+) concentrations (25 and 60 mM, respectively). OS shifted the concentration-response curve for calcium to the right in a parallel manner. GC/MS analysis showed that OS consists mostly of methyl chavicol (97.57%). These results suggest that OS antispasmodic effect is mediated through calcium channel blockade. In addition, OS effect and mode of action could be accounted for methyl chavicol.
Subject(s)
Ileum/drug effects , Ocimum/chemistry , Oils, Volatile/pharmacology , Parasympatholytics/pharmacology , Plant Oils/pharmacology , Allylbenzene Derivatives , Animals , Anisoles/pharmacology , Female , Gas Chromatography-Mass Spectrometry , Guinea Pigs , In Vitro Techniques , Male , Muscle Contraction/drug effects , Muscle, Smooth/drug effects , Plant Leaves/chemistryABSTRACT
Pimenta racemosa var. racemosa (Mill.) J.W. Moore, is a Caribbean arboreal plant belonging to the family Myrtaceae with a special interest in their leaves for the production of essential oil, commonly known as "Bay-Rum". Steam distillation of fresh leaves collected in April 2012 produced two types of essential oil, one of these resulted lighter than water and was named (AL) and the other one heavier than water (AP). Gas chromatography/mass spectrometry analysis showed the presence of 17 components constituting 99.9 percent for AL, being the major compounds: eugenol (60.4 percent), myrcene (11.7 percent), chavicol (6.0 percent), limonene (5.4 percent) and linalool (4.4 percent); for the AP, 13components were identified (98.3 percent) from which eugenol (82.9 percent) and chavicol (9.3 percent) were in major proportions.
Pimenta racemosa var. racemosa (Mill.) J.W. Moore, es una planta caribeña, arbórea, perteneciente a la familia Myrtaceae y con un especial interés en sus hojas para la producción del aceite esencial comúnmente conocido como Bay-Rum. La destilación por arrastrecon vapor de las hojas frescas colectadas en abril 2012 produjo dos tipos de aceites esenciales, uno ligero (AL) y otro más pesado que elagua (AP). El análisis de sus componentes volátiles por cromatografía de gases/espectrometría de masas mostró 17 componentes lo que constituye el 99,9 por ciento del AL de los cuales los mayoritarios fueron eugenol (60,4 por ciento), mirceno (11,7 por ciento), chavicol (6,0 por ciento), limoneno (5,4 por ciento) ylinalool (4,4 por ciento); para el AP, 13 componentes fueron identificados (98,3 por ciento) de los cuales eugenol (82,9 por ciento) y chavicol (9,3 por ciento) fueron los mayoritarios.