Objective To explore the possible mechanism of injury by smoking, and the effect of cigarette smoke extract (CSE) on Ecadherin (ECD) expression in airway epithelial cells (AEC) was observed.

• 目的观察香烟烟雾提取物（CSE）对气道上皮细胞（AEC）、上皮钙粘附素（ECD）表达的影响，探讨其表达变化在吸烟致AEC损伤中的作用。