Objective: To investigate the effect of all?trans retinoic acid (ATRA) and 9?cis retinoic acid (9?cis RA) on the expression of Fas and the sensitivity to anti?Fas induced apotosis in HL-60 cells.

• 目的：探讨全反式维甲酸（ATRA）和9?顺式维甲酸（9?cisRA）对HL?60细胞Fas表达水平及维甲酸对抗Fas抗体诱导的细胞凋亡敏感性的影响。