局部应用他克莫司对异种毛囊移植的影响

Effect of topical tacrolimus on xenogeneic hair follicle transplantation

目的 探讨建立人-大鼠异种毛囊移植的可行性及局部辅助应用他克莫司的效果.方法 以人头皮毛囊为供体,Wistar大鼠为受体,将黑色人头皮毛囊种植于白色Wistar大鼠背部,进行异种毛囊移植.实验分两组：局部外用他克莫司组（A组）,空白对照组（B组）.观察毛囊存活时间及形态学变化.结果 A组异种移植毛囊平均存活（49.9±7.1）d,而B组异种移植毛囊平均存活（13.1±1.2）d.A组异种移植毛囊最长存活可达65 d,而B组异种移植毛囊最长存活仅为15 d.通过对比可以看出,局部用药可以显著延长异种移植毛囊的存活时间,但是仅靠局部用药仍无法避免排斥反应的发生.结论 依赖生长期毛囊的自身免疫赦免功能及辅助外用他克莫司抑制免疫排斥反应,可明显延长人-鼠异种毛囊移植的存活时间.

Objective To study the effect of topical tacrolimus （FK506） on the survival of the xenogeneic transplanted hair follicles from human scalp to Wistar rats. Methods In our study, Wistar rats were used as recipients and human as donor. The black hair follicles of human scalp were harvested, and then the xenogeneic grafts were transplanted to white Wistar rats on the back. 20 couples of rats were divided in 2 groups： topical tacrolimus group （group A）, and blank control group （group B）. After operaton, we compared the survival time of hair follicles and their histologic outcomes in order to verify the practicability of xenogeneic transplantion of hair follicles, and the topical application of tacrolimus results.Results The mean survival time of group A was longer [（49. 9 ±7. 1） days] as compared to group B [（13. 1±1. 2） days]. The longest survival time was 65 days in group A and 14 days in group B, respectively. By comparison of the results we found that topical tacrolimus prolonged the survival time of the xenotransplanted hair follicles significantly and that tropical medication could not avoid rejection. Conclusions The immune privilege function dependent on the hair follicle anagen and axillary topical tacrolimus, can prolong the survival time of the xenogeneic transplanted hair follicles in rats significantly.