Danggui-shaoyao-san, a traditional Chinese medicine prescription,alleviates the orthodonti

Danggui-shaoyao-san, a traditional Chinese medicine prescription,alleviates the orthodontic pain and inhibits neuronal and microglia activation

Li Hongshi;Gu Zexu;Wu Li'an;Xia Liang;Zhou Kecheng;E Lingling;Wang Dongsheng

【期刊名称】《中华医学杂志（英文版）》 【年(卷),期】2014(127)020

【摘要】Background The pain caused by orthodontic treatment has been considered as tough problems in orthodontic practice.Danggui-shaoyao-san (DSS) is a traditional Chinese medicine (TCM) prescription which has long been used for pain treatment and possesses antioxidative,cognitive enhancing and antidepressant effects.We raise the hypothesis that DSS exerts analgesic effect for orthodontic pain via inhibiting the activations of neuron and microglia.Methods DSS was given twice a day from day 5 prior to experimental tooth movement (ETM).Directed face grooming and vacuous chewing movements (VCM) were evaluated.Immunofluorescent histochemistry and Western blot analysis were used to quantify the Iba-1 (microglia activation) and Fos (neuronal activation) expression levels in the trigeminal spinal nucleus caudalis (Vc).Results ETM significantly increased directed face grooming and VCM which reached the peak at post-operative day (POD) 1 and gradually decreased to the baseline at POD 7.However,a drastic peak increase of Fos expression in Vc was observed at 4 hours and gradually