Comparative assessment of dermal wound healing potentials of various Trifolium L. extracts and determination of their isoflavone contents as potential active ingredients
2013
Renda, Gülin | Yalçın, Funda N. | Nemutlu, Emirhan | Akkol, Esra Küpeli | Süntar, İpek | Keleş, Hikmet | Ina, Hiroji | Çalış, İhsan | Ersöz, Tayfun
ETHNOPHARMACOLOGICAL RELEVANCE: Trifolium species are used in Turkish folk medicine as a wound healing agent, expectorant, antiseptic, sedative and to alleviate pain in rheumatism. In the present study, the aqueous methanolic extracts (80%) of 13 Trifolium species (Trifolium ambigum, Trifolium arvense var. arvense, Trifolium campestre, Trifolium canescens, Trifolium hybridum var. anatolicum, Trifolium hybridum var. hybridum, Trifolium pannonicum, Trifolium pratense var. pratense, Trifolium purpureum var. purpureum, Trifolium repens var. repens, Trifolium resupinatum var. microcephalum, Trifolium spadiceum and Trifolium trichocephalum) collected from different regions of Anatolia were evaluated for their in vivo wound healing effects. MATERIALS AND METHODS: In vivo wound healing activities of the plant aqueous methanolic extracts were evaluated by linear incision and circular excision wound models subsequent to histopathological analysis. Active constituents were determined by a validated high performance liquid chromatographic method. Precision of the method was performed by the evaluation of intra-day and inter-day variations of the each standard at limits of quantification (LOQ) levels. RESULTS: The aqueous methanolic extracts of Trifolium canescens and Trifolium pretense var. pratense possessed better wound healing activity compared to the other extracts and control groups. The animal groups treated with the Trifolium canescens extract demonstrated increased contraction (48.96%) on excision and a significant increase in wound tensile strength (35.6%) on incision models. The main compounds were detected as genistein and biochanin A for Trifolium canescens. CONCLUSION: The results of the present study revealed the wound healing potential of Trifolium canescens. This might be due to the combined effect of the isoflavones genistein, formononetin, daidzein, and biochanin A present in the extract.
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