The changes of epidermal cell proportion in skins derived from fetus with different embryonic gestational ages (EGA), children and adult were studied.

• 结 果 胚龄门刁1周胎儿皮肤表皮基底层细胞pl整合素和K19表达阳性。 其表皮外层可观察到K10阳性细胞，并随胚龄增加，K10阳性细胞层数增多。