Abstract
Inhibition of inflammatory responses, acceleration of basal cell growth and balanced synthesis of the extracellular matrix (ECM) are important in the healing of open cutaneous wounds. To evaluate the wound-healing effects of Astragali Radix (AR) (the root of Astragalus membranaceus [Fisch.]), experimental open wounds were made on the dorsal side of rats under anesthesia. Boiling water extracts of AR, soaked into a hydrophilic foam dressing, were topically applied to the wounds once a day for 11 consecutive days. The healing process was assessed by scoring macroscopic appearance and measuring the area of the open wounds. Molecular aspects of the healing skin area were also investigated via histological observation indicating cell density and linear alignment of the granulation tissue. The AR extracts significantly accelerated cutaneous wound healing by suppressing inflammation and stimulating basal cell growth in the wound area compared to epidermal growth factor as a positive control. Promotion of basal cell proliferation and angiogenesis by the AR extracts was remarkable in the early stages of wound healing, resulting in a significant reduction in the duration of the wound-healing process. We conclude that extracts of AR could be useful in enhancing cutaneous wound healing.
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