Antimicrobial and anti-inflammatory potential of Angelica dahurica and Rheum officinale extract accelerates wound healing in Staphylococcus aureus-infected wounds

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Abstract

Wound infection is a serious clinical problem, and the most common infection-causing bacteria are Staphylococcus aureus and Pseudomonas aeruginosa. Angelica dahurica and Rheum officinale extract (ARE) was reported to accelerate excisional wound healing in rats. In this study, we investigated the therapeutic effects of ARE on bacterial-infected wounds. Thirty Sprague-Dawley rats were divided into three groups: normal saline (NS), ARE, and biomycin ointment (BO). Full-thickness dorsal excisions in all the rats were infected with 108 colony-forming units of S. aureus; the treatments were applied once daily for 7 days. Results showed that the residual wound area in ARE group was smaller than those in NS and BO groups. TBCs on wound sites gradually decreased in ARE and BO groups. The body temperature and plasma inflammatory cytokines (TNF-α, IL-6) levels increased after bacterial infection at 24 h in all groups. After treatment, BT and inflammatory cytokines levels decreased in ARE group. Histological observations showed ARE group exhibited earlier scab formation, denser dermal granulation tissue, thicker epidermis, and more angiogenesis markers than the other groups. In conclusion, ARE accelerated wound healing in S. aureus-infected wounds. We proposed ARE exhibited potential antimicrobial and anti-inflammatory effects and stimulated angiogenesis, thus improving healing in infected wounds.

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Yang, W. T., Ke, C. Y., Wu, W. T., Tseng, Y. H., & Lee, R. P. (2020). Antimicrobial and anti-inflammatory potential of Angelica dahurica and Rheum officinale extract accelerates wound healing in Staphylococcus aureus-infected wounds. Scientific Reports, 10(1). https://doi.org/10.1038/s41598-020-62581-z

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