JOURNAL ARTICLE

Effects of Hibiscus rosa sinensis L (Malvaceae) on wound healing activity: a preclinical study in a Sprague Dawley rat

B Shivananda Nayak, S Sivachandra Raju, F A Orette, A V Chalapathi Rao
International Journal of Lower Extremity Wounds 2007, 6 (2): 76-81
17558005
Hibiscus rosa sinensis (H rosa sinensis), a plant product, has been used for the treatment of a variety of diseases as well as to promote wound healing. The wound-healing activity of the ethanol extract of H rosa sinensis flower was determined in rats, using excision, incision, and dead space wound models and is presented in this report. The animals were randomly divided into 2 groups of 6 each in all the models. Test group animals in each model were treated with the ethanol extract of H rosa sinensis orally by mixing in drinking water (120 mg kg(-1) day(-1)), and the control group animals were maintained with plain drinking water. Healing was assessed by the rate of wound contraction, period of epithelialization, tensile strength (skin breaking strength), granulation tissue weight, and hydroxyproline content. The antimicrobial activity of the flower extract against selected microorganisms that infect the wounds was also assessed. Animals treated with the extract exhibited an 86% reduction in the wound area compared with controls, who exhibited a 75% reduction. The extract-treated animals were found to epithelize their wounds significantly faster than controls (P < .002) and have shown significantly higher skin-breaking strength than controls (P < .002). The dry and wet weight of granulation tissue and hydroxyproline content were also increased significantly when compared with controls. The reported observations suggest H rosa sinensis aids wound healing in the rat model.

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