EFFECTS OF MARMIN, A COMPOUND ISOLATED FROM AEGLE MARMELOS CORREA, ON CONTRACTION OF THE GUINEA PIG-ISOLATED TRACHEA
AGUNG ENDRO NUGROHO1, YANCE ANAS1, PUGUH NOVI ARSITO1, JOKO TRI WIBOWO1, SUGENG RIYANTO2 AND MOHAMAD ASPOLLAH SUKARI3
1Department of Pharmacology and Clinical Pharmacy, Faculty of Pharmacy, Universitas Gadjah Mada, Jogjakarta, Indonesia
2Department of Pharmaceutical Chemistry, Faculty of Pharmacy,Universitas Gadjah Mada, Jogjakarta, Indonesia
3Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Selangor, Malaysia
Marmin or 7-(6’,7’-dihydroxygeranyl-oxy)coumarin is a compound isolated from Aegle marmelos Correa. In the study, we examined the effects of marmin on the contraction of guinea pig-isolated trachea stimulated by several inducers, namely histamine, metacholine, compound 48/80. We also evaluated its action against contraction induced by extracellular or intracellular calcium ion. The possibility of marmin to potentiate the relaxation effect of isoprenaline was also studied. Marmin added in the organ bath at 10 min prior to the agonist inhibited the contraction elicited by histamine and metacholine in a concentration-dependent manner. Moreover, marmin antagonized the histamine-induced contraction in competitive manner. Marmin mildly potentiated the relaxation effect of isoprenaline. In the study, marmin abrogated the contraction of tracheal smooth muscle induced by compound 48/80, an inducer of histamine release. Besides, marmin successfully inhibited CaCl2- induced contraction in Ca2+-free Krebs solution. Marmin also inhibited two phases of contraction which were consecutively induced by metacholine and CaCl2 in Ca2+-free Krebs solution. Based on the results we concluded that marmin could inhibit contraction of the guinea-pig tracheal smooth muscle, especially by interfering histamine receptor, inhibiting the histamine release from mast, inhibiting intracellular Ca2+ release from the intracellular store and the Ca2+ influx through voltage-dependent Ca2+ channels.
Keywords: Aegle marmelos Correa, marmin, trachea smooth muscle, guinea pig.
Download Full Text (PDF : 103 kb)
Sumber : Pak. J. Pharm. Sci., Vol.24, No.4, October 2011, pp.427-433