Methods Cheek skin samples of SD rats at different ages were collected, fixed and sectioned.LEF-1 expression at different periods was detected by immunohistochemistry.

• 方法 选取处于毛发周期各阶段的触须毛囊，采用免疫组织化学的方法检测LEF-1在各时期毛囊中的表达及变化。