ABSTRACT
Objective: To study the effect of Yinhuangshen essential oil in mice of solar dermatitis model by ultraviolet (UVB). Method: Sixty SPF BALB/c female mice were randomly divided into blank group, model group, Minlixiao group, and large and small-dose Yinhuangshen essential oil groups. Except for blank group, model group was given 0.25 mL·cm-2 normal saline on the back every day. The Minlixiao group was given Min Lixiao every day. Low-dose Yinhuangshen essential oil group was given 0.125 mL·cm-2, and large-dose group was given 0.25 mL·cm-2, once a day, and the corresponding drugs were given continuously for 8 days. Except for blank group, all of the other groups were irradiated for 1.5 hours at 15 cm away from 308 nm UVB lamp on the 6th day. One hour and 24 hours after irradiation, mice were given corresponding drug once, and skin was observed 48 hours later. Contents of nitric oxide (NO), nitric oxide synthase (NOS) and tumor necrosis factor-alpha (TNF-α) in some local skin homogenates were measured. The histopathological changes were observed by htoxylin eosin(HE) staining. Result: Compared with blank group, skin of model group was reddish, swollen and ulcerated, epithelium and adnexal were absent, a large number of inflammatory cells and necrosis were adhered to the surface, the local histopathological changes significantly (Pα were significantly increased (Pα in the skin tissue of Minlixiao group and Yinhuangshen essential oil group were significantly decreased, and it could remarkable reduce the pathological changes in local tissue morphology (PConclusion: Yinhuangshen essential oil has a good effect in preventing and treating solar dermatitis.