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    Angiotensin‑Converting Enzyme Inhibitory Activity of Senna garrettiana Active Compounds: Potential Markers for Standardized Herbal Medicines

    Fameera Madaka2, Tossaton Charoonratana3★★ Corresponding author

    1. 1Sino‑Thai Traditional Medicine Research Center, Faculty of Pharmacy, Rangsit University.
    2. 2Department of Pharmacognosy, Faculty of Pharmacy, Rangsit University, Lak‑Hok, Muang, Pathum Thani, Thailand ORIGINAL ARTICLE Pharmacogn. Mag. A multifaceted peer reviewed journal in the field of Pharmacognosy and Natural Products.

    CORRESPONDENCE

    Tossaton Charoonratana

    tossaton.ch@rsu.ac.th

    Received: 24-07-2017; Revised: 13-09-2017.

    Volume 14, Issue 57s · pp. S335–S339 · PUBLISHED 10 September 2018 · DOI: 10.4103/pm.pm_325_17

    View on Pharmacogn. Mag. original site ↗

    ABSTRACT

    Background: Fifteen medicinal plants used in traditional Thai herbal medicine (HM) for hypertension treatment were previously tested for their inhibitory activity against an angiotensin‑converting enzyme (ACE). The ethyl acetate extract from one of these medicinal plants, Senna garrettiana, possessed satisfactory ACE inhibitory (ACEi) activity. Objective: For this study, S. garrettiana extract was further subjected to an isolation process to uncover the active compounds with ACEi activity. Materials and Methods: The ethyl acetate fraction was subjected to isolate and purify by column chromatography accompany with the ACEi assay. The structures of all compounds were elucidated using nuclear magnetic resonance spectroscopy. Results: It was found that S. garrettiana extract possessed two active compounds, piceatannol and betulinic acid, which both had good ACEi activity displaying IC50 values of 8.44 µM and 26.77 µM, respectively. Conclusions: These findings show that both compounds can be used as markers for quality control of any standardized HM for hypertension treatment and not just for traditional Thai herbal remedies. Moreover, to the best of our knowledge, this is the first report investigating both compounds for their ACEi activity.

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      Madaka, F., & Charoonratana, T. (2018). Angiotensin‑Converting Enzyme Inhibitory Activity of Senna garrettiana Active Compounds: Potential Markers for Standardized Herbal Medicines. Pharmacognosy Magazine, 14(57s), S335–S339. https://doi.org/10.4103/pm.pm_325_17