Myostimulating Effect of the Aqueous Extract of Khaya senegalensis (Desr) A. Juss.(Meliaceae) in Isolated Taenia caeci Contractile Activity

Author(s): A. Souza, J. Aka Kadjo, J. C. Abo Kouakou, Y. Datte-Jacques, F. Traore, B. M'Batchi

Journal Name: Current Bioactive Compounds

Volume 3 , Issue 4 , 2007

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The effects of the aqueous extract of Khaya senegalenis (Desr) A. Juss. (Meliaceae) (EAKS) were evaluated on the contractile activity of the guinea-pig Taenia coli. EAKS in a range of concentrations from 10-8mg/ml to 10-2mg/ml induced an increase of the spontaneous rhythmic contractions and of basal muscular tone, in a concentration-dependent manner (EC50: 6.10-4 mg/ml). With 10- 2mg/ml of the extract, maximal stimulation was obtained. The effects of EAKS were comparable to those induced by acetylcholine (ACh). Moreover, the cholinoceptor antagonist, atropine, applied at a concentration of 10-6 mg/ml inhibited the stimulating effects of ACh. However, atropine did not inhibit the myostimulant action induced by EAKS. In calcium-free solution containing EDTA, a bivalent chelator, at a concentration of 10-3 mM, EAKS had no effect on the guinea-pig isolated Taenia coli. In the same conditions, ACh induced an increase of basal muscular tone. In conclusion, EAKS exerted a stimulating effect in the intestinal smooth muscle. Cholinergic mechanisms may not be involved. The myostimulating action of EAKS could be due to a mobilization of bivalent, mainly calcium flux.

Keywords: Acetylcholine, Contractions, Khaya senegalensis, Smooth muscle, Taenia caeci

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Article Details

Year: 2007
Page: [291 - 294]
Pages: 4
DOI: 10.2174/157340707783220239
Price: $65

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