6-姜酚对毛发生长影响的实验研究

Inhibition effect of 6-Gingerol on hair growth

目的探讨生姜提取物6-姜酚对毛发生长的影响。方法将C57BL／6小鼠触须毛囊分别与浓度为0、10、20μg／ml的6-姜酚共培养，5d后测量各组毛干的延长长度；将第4代小鼠触须毛乳头细胞（dermal papillac ells，DPCs）与浓度为O、5、10μg／ml的6-姜酚共培养，3d后采用MTT法测量各组细胞的吸光度A值，同时采用Western blot法检测各组细胞中Bax和Bcl一2蛋白的表达量；在体内实验中，分别采用浓度为0、0．1、1mg／ml的6-姜酚局部涂抹小鼠背部脱毛区皮肤，连续给药10d，大体观察受试区毛发生长情况和计数毛发长度，取材后行HE染色观察毛囊生长密度。结果20μg／ml组的毛干延长长度（0．50±0．08）mm，短于0μg／ml组和10μg／ml组的毛干长度（0．66±0．19）mm和（0．64±0．03）mm，差异有统计学意义（P〈0．05）；与0μg/ml和5μg／ml 2组相比，6-姜酚在10阻g／ml时可明显抑制DPCs的增殖（P〈0．05），同时，该组DPCs内Bax／Bcl-2的比值也明显增高，差异有统计学意义（P〈0．05）；在体内实验中，1mg／ml组中C57BL／6小鼠背部毛发生长密度和生长长度明显小于0mg／ml和0．1mg／ml 2组。结论6-姜酚可抑制毛发生长，其机制可能是通过增加DPCs中Bax／Bcl-2蛋白的比值促进DPCs凋亡而实现。

Objective To investigate the effect of 6-gingerol, the main active component of ginger, on hair shaft elongation in vitro and hair growth in vivo. Methods Firstly, Hair follicles were co- cultured with 3 different concentration of 6-gingerol for 5 days and hair elongation in three groups was measured. Secondly, The proliferative effect of 6-gingerol on DPCs was measured using MTT assay. Thirdly, the expression of Bcl-2 and Bax in DPCs were measured using Western blotting. In vivo study, the influence of 6-gingerol on hair growth in C57BL/6 rats was measured through topical application of 6- gingerol on the dorsal skin of each animal. Results The length of hair shaft in 20 μg/ml 6-Gingerol group （0.50 ±0.08 mm） is less than 0 μg/ml （0.66 ±0.19） mm and 10 μg/ml （0.64 ±0.03） mm 6- Gingerol group （P 〈0.05）. In cell culture, compared to 0 μg/ml and 5 μg/ml 6-Gingerol, 10 μg/ml 6- Gingerol can significantly inhibited the proliferation of DPCs （P 〈 0.05）. Along with the growth inhibition of DPCs by 6-gingerol, the Bax/Bcl-2 ratio increased obviously. In vivo study, the hair length and density decreased a lot after using 1 mg/ml 6-gingerol. Conclusions 6-Gingerol can suppress human hair shaft elongation because it has pro-apoptotic effects on DPCs via increasing Bax/Bel-2 ratio. It might inhibit hair growth by prolonging the telogen stage in vivo.