In vitro cholinomimetic effect of Loranthus ferrugineus in isolated guinea pig ileum

Journal of Acupuncture and Meridian Studies
Omar Z AmeerMohd Z Asmawi

Abstract

This study aimed to elucidate the mechanism(s) of the spasmogenic action of Loranthus ferrugineus in isolated guinea pig ileum. Thus the contractile responses of guinea pig ileum to graded additions of either L. ferrugineus methanol extract or its n-butanol fraction were tested in the presence and absence of various pharmacological interventions. The data showed that L. ferrugineus methanol extract and the n-butanol fraction produced a concentration-dependent spasmogenic effect in isolated guinea pig ileum segments. These effects were significantly inhibited in the presence of 1 microM atropine. In contrast, the response to the lowest concentrations of L. ferrugineus methanol extract (0.25, 0.5 and 1 mg/mL) and n-butanol fraction of L. ferrugineus (0.125, 0.25 and 0.5 mg/mL) were considerably enhanced in the presence of 0.05 microM neostigmine. Neither L. ferrugineus methanol extract nor n-butanol fraction contractile responses were affected upon the incubation of the ileal segments with 100 microM hexamethonium. The results of this study show that the spasmogenic effect of L. ferrugineus is possibly mediated through a direct action on intestinal muscarinic receptors. It is suggested that the bioactive constituents of L. ferrug...Continue Reading

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Citations

Apr 2, 2015·Journal of Pharmacopuncture·Omar Z AmeerMohd Z Asmawi
Aug 23, 2016·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Ya Chee LimSheba R David
Dec 10, 2009·Blood·Tiphaine DejouvencelEduardo Anglés-Cano

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