Methods: Human ovarian cancer cell line COC1 was cultured in medium containing ATRA in different concentrations in vitro. Cell proliferation inhibition was tested by MTT assay.

• 方法：选用人卵巢癌细胞株COC1进行体外培养，以不同浓度的ATRA处理COC1细胞，四甲基偶氮唑蓝（MTT）比色法检测细胞增殖抑制情况；