Wound healing properties of a new formulated flavonoid-rich fraction from Jacq. leaves extract.

Wound healing properties of a new formulated flavonoid-rich fraction from Jacq. leaves extract.

Subramanian, Shanthi; Duraipandian, Chamundeeswari; Alsayari, Abdulrhman; Ramachawolran, Gobinath; Wong, Ling Shing; Sekar, Mahendran; Gan, Siew Hua; Subramaniyan, Vetriselvan; Seethalakshmi, S; Jeyabalan, Srikanth; Dhanasekaran, Sivaraman; Chinni, Suresh V; Mat Rani, Nur Najihah Izzati; Wahab, Shadma
Frontiers in pharmacology 2023 Vol. 14 pp. 1096905
52
subramanian2023wound

Abstract

Jacq. () belongs to the family of Sapindaceae, commonly known as "" and is used as a traditional medicine for treating wounds due to its high flavonoids content. However, to date there is no experimental evidence on its flavonoid-rich fraction of formulation as an agent for healing wounds. The present study aimed to evaluate the wound healing effect of ethyl acetate fraction of leaves on dermal wounds. The ethyl acetate fraction was produced from a water-ethanol extract of leaves and was quantitatively evaluated using the HPLC technique. The wound healing ability of the ethyl acetate fraction of ointment (DVFO, 2.5%w/w and 5%w/w) was investigated in rats utilizing an incision and excision paradigm with povidone-iodine ointment (5% w/w) as a control. The percentage of wound closure, hydroxyproline and hexosamine concentrations, tensile strength and epithelialization duration were measured. Subsequently, histopathology analysis of skin samples as well as western blots were performed for collagen type 3 (COL3A1), basic fibroblast growth factor (bFGF) and vascular endothelial growth factor (VEGF). The ethyl acetate fraction of revealed flavonoids with high concentrations of quercetin (6.46% w/w) and kaempferol (0.132% w/w). Compared to the control group, the DVFO (2.5% and 5.0% w/w) significantly accelerated wound healing in both models, as demonstrated by quicker wound contraction, epithelialization, elevated hydroxyproline levels and increased tensile strength. Histopathological investigations also revealed that DVFO treatment improved wound healing by re-epithelialization, collagen formation and vascularization of damaged skin samples. Western blot analysis further demonstrated an up-regulation of COL3A, vascular endothelial growth factor and bFGF protein in wound granulation tissue of the DVFO-treated group ( < 0.01). It is concluded that flavonoid-rich ethyl acetate fraction promotes wound healing by up-regulating the expressions of COL3A, VEGF and bFGF protein in wound granulation tissue. However, extensive clinical and pre-clinical research on the flavonoid-rich fraction of is needed to determine its significant impact in the healing of human wounds.

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