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    Antiradical and antidiabetic properties of standardized extract of Sunderban mangrove Rhizophora mucronata

    Tapas Kumar Sur2★, Alok Kumar Hazra3, Dipankar Bhattacharyya2,4, Avijit Hazra2★ Corresponding author

    1. 1Department of Pharmacology, Institute of Post Graduate Medical Education and Research, India.
    2. 2Department of Chemistry, Quality Testing Laboratory (AYUSH), Vivekananda University, Narendrapur, Kolkata, India.
    3. 3Department of Pharmacology, JNM College of Medicine and Hospital, Kalyani, Nadia, West Bengal, India.

    CORRESPONDENCE

    Tapas Kumar Sur

    Department of Chemistry, Quality Testing Laboratory (AYUSH), Vivekananda University, Narendrapur, Kolkata, India.

    drtapaskumarsur@gmail.com

    Received: 25-02-2014; Revised: 02-05-2014.

    Volume 11, Issue 42 · pp. 389–394 · PUBLISHED 12 March 2015 · DOI: 10.4103/0973-1296.153094

    View on Pharmacogn. Mag. original site ↗

    ABSTRACT

    Background: Mangroves have the ability to grow where no other vascular plants survive. Rhizophora mucronata is a true mangrove and traditionally used to treat diabetes and its allied complications. Objectives: In the present study, we standardized the 80% methanolic standardized extract of R. mucronata leaves (RH) and found out its antiradical and antidiabetic activities. Materials and Methods: The methanolic extract of R. mucronata leaves (RH) was standardized and quantified for phenolics, flavonoinds, gallic acid, quercetin, and coumarin. The reducing abilities and antiradical activities of RH were performed in vitro methods like, 1,1‑diphenyl‑2‑picrylhydrazyl, nitric oxides, superoxides, hydroxyl, and ABTS (2,2’‑azino‑bis‑3‑ethyl benzthiazoline‑6‑sulphonic acid). Thereafter, RH was evaluated for it antidiabetic potentialities on streptozotocin (STZ)‑induced type‑2 diabetes. STZ (90 mg/kg, intraperitoneal) was administered to 2 days old pups to induce diabetes. RH was fed at doses of 50 and 100 mg/kg and glibenclamide (positive control) at 5 mg/kg, when the rats were 6 weeks old and continued for 10 weeks. Fasting glucose was monitored before and after the treatment. Further, lipid peroxides and reduced glutathione level were estimated on rat liver. Results: The results obtained from this study revealed RH possesses flavonoinds and also gallic acid, quercetin, and coumarin. Further, it has antiradical activities. It has also reduced blood glucose level in type‑2 diabetic rats and reduced the formation of lipid peroxidation in liver. RH enhanced the level of glutathione in liver tissue. Conclusion: RH exhibits source of natural antioxidants and great potentialities as an antidiabetic agent by improving the hyperglycemia through its antiradical action.

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      Sur, T. K., Hazra, A. K., Bhattacharyya, D., & Hazra, A. (2015). Antiradical and antidiabetic properties of standardized extract of Sunderban mangrove Rhizophora mucronata. Pharmacognosy Magazine, 11(42), 389–394. https://doi.org/10.4103/0973-1296.153094