Objective To investigate effects of smoking on Ecadherin (Ecd) expression of injury and repair of respiratory tract epithelium by observation of dynamic expression of Ecd on epithelial cells of respiratory tract in smoking mice.

• 目的通过观察吸烟小鼠呼吸道上皮细胞上皮钙粘附素（E?cd）表达的动态变化，探讨吸烟对呼吸道上皮细胞E?cd表达的影响。