Bronchial epithelial cell extracellular vesicles ameliorate epithelial-mesenchymal transition in COPD pathogenesis by alleviating M2 macrophage polarization

He, Shengyang; Chen, Duanni; Hu, Mengyun; Zhang, Li; Liu, Caihong; Traini, Daniela; Grau, Georges E.; Zeng, Zhengpeng; Lu, Junjuan; Zhou, Guanzhi; Xie, Lihua; Sun, Shenghua