Objective:To investigate the effect of 9 cis RA on the differentiation and apoptosis of human lung squamous carcinoma cell lines(L78 and A2).

• 目的 :研究 9 顺 维甲酸 (9 cis RA)对人肺鳞癌L78细胞、A2细胞分化和凋亡的影响。