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  • Title: Comparative pharmacokinetics between madecassoside and asiaticoside presented in a standardised extract of Centella asiatica, ECa 233 and their respective pure compound given separately in rats.
    Author: Hengjumrut P, Anukunwithaya T, Tantisira MH, Tantisira B, Khemawoot P.
    Journal: Xenobiotica; 2018 Jan; 48(1):18-27. PubMed ID: 28001462.
    Abstract:
    1. ECa 233, the standardised extract of Centella asiatica, contains not less than 80% triterpenoid glycosides, in a madecassoside:asiaticoside ratio of 1.5 (±0.5):1. 2. The pharmacokinetic comparison of madecassoside and asiaticoside was performed in rats following intravenous and oral administration of ECa 233, or an equivalent dose of the individual compounds. Blood, tissues, urine and faeces were collected after dosing to determine drug and metabolite levels using liquid chromatography-tandem mass spectrometry. 3. Our study demonstrated that plasma levels of madecassoside, and to a lesser extent asiaticoside, were higher after administration of ECa 233 than the corresponding values for the pure compounds. There was a bidirectional interconversion between asiaticoside and madecassoside consistent with the increased exposure of madecassoside and asiaticoside in ECa 233. 4. Both madecassoside and asiaticoside appeared to be widely distributed in several organs and metabolized extensively; following intravenous administration of either compound, approximately 80-90% of the dose was recovered as madecassic acid and asiatic acid in the faeces.
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