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Archive > Volume 9 Issue 2 > 2017,9(2):134-146. DOI:10.1016/S1674-6384(17)60087-X Prev Next

Original articles

Decomposition and Reformulation of Banxia Baizhu Tianma Decoction: A Vasodilatory Approach

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    Abstract:
    Objective To decompose and reformulate Banxia Baizhu Tianma Decoction (BBT) in order to optimize its ratio for vasodilatory effect. The fingerprints of these six component herbs were also studied via Tri-step FTIR analysis. Methods The herbal components of BBT were extracted separately with different solvents, such as 95% ethanol, 50% ethanol, and distilled water. The vasodilatory effect of the extracts was studied using the in vitro pre-contracted aortic ring model. Among these extracts, the water extracts of Pinellia ternata [PT(W)] and Citri reticulatae [CR(W)], 50% ethanol extracts of Gastrodia elata [GE(50)] and Glycyrrhiza uralensis [GU(50)], and 95% ethanol extracts of Atractylodes macrocephala [AM(E)], and Poria cocos [PC(E)] were selected for the orthogonal stimulus-response compatibility group study due to their high effectiveness in vasodilation. Results The best combination ratio (G2) was GE(50), GU(50), AM(E), PC(E), CR(W), and PT(W) at EC0, EC5, EC5, EC5, EC5, and EC5, with EC50 of (0.06 ± 0.01) mg/mL. Comparison between the vasodilatory effects of extracts derived from G2 and BBT were also studied. From the results, the 50% ethanol extract following G2 ratio was found to be most potent extract with the highest vasodilatory effect compared with other extracts derived from G2 or BBT, with EC50 of (0.05 ± 0.005) mg/mL. Conclusion The optimum ratio and appropriate extraction method for the new BBT formulae are obtained. G2 is determined as the best formulae with the highest potency in producing the vasodilatory effect on isolated rat aortic rings. The results obtained suggest that 50% ethanol is found to be the best solvent to extract the vasoactive compounds of G2 in order to exhibit the highest efficacy of vasodilatory effect.

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    Project Supported:
    Exploratory Research Grant Scheme (ERGS) (203/PFARMASI/6730122) and Universiti Sains Malaysia-Research University Grants (1001/PFARMASI/ 812195)

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