Abstract
The effect of topical application of phytoconstituents (fraction I, II and III) fractionated from a hydroalcohol extract of the bark of the plant, Terminalia arjuna, was assessed on the healing of rat dermal wounds using in vivo models. The results indicated a statistically significant increase in the tensile strength of the incision wounds and the percent epithelialization of excision wounds compared with control (p < 0.05). However, topical treatment with fraction I, consisting mainly of tannins, was found to demonstrate a maximum increase in the tensile strength of incision wounds. Even with respect to excision wounds, the fastest rate of epithelialization was seen with fraction I. Hexosamine estimation of granulation tissue obtained from excision wounds revealed an increase in the hexosamine content with fraction I compared with the control. In addition, fraction I from the hydroalcohol extract of Arjuna bark possessed antimicrobial activity against tested microorganisms such as Pseudomonas aeruginosa, Escherichia coli, Staphylococcus aureus, Streptococcus pyogenes but not Candida albicans. These results strongly document the beneficial effects of fraction I, consisting mainly of tannins, of Terminalia arjuna in the acceleration of the healing process. Thus, the present study validates the claim made with respect to the plant as well as corroborating the astringent effect of tannins by drawing the tissues closer together.
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