3种倍半萜化合物抑制妇科肿瘤细胞增殖活性及其作用机制探讨

目的：观察菊科植物中分离出的3种倍半萜化合物异土木香内酯、1-氧-乙酰大花旋覆花内酯和大花旋覆花内酯对体外培养的人子宫颈癌HeLa细胞、人子宫内膜癌HEC-1细胞、人卵巢透明细胞癌SHIN3及HOC-21细胞和人卵巢囊腺癌HAC-2细胞增殖的影响，研究这3种倍半萜化合物的体外抑制肿瘤细胞增殖作用及其结构与活性之间的构效关系，进而探讨3种倍半萜化合物的体外抑制肿瘤细胞增殖的可能机制。方法：以HeLa、HEC-1、SHIN3、HOC-21和HAC-2细胞为研究对象，利用四唑盐（MTT）比色法检测3种倍半萜化合物对上述5种妇科肿瘤细胞增殖的抑制作用；利用流式细胞术检测异土木香内脂对HeLa细胞凋亡的影响。结果：异土木香内酯对上述5种肿瘤细胞的增殖均有明显的抑制作用，1-氧-乙酰大花旋覆花内酯和大花旋覆花内酯即使在100μmol／L的高浓度下，对5种妇科肿瘤细胞的增殖不显示抑制活性；流式细胞学检查发现异土木香内脂处理后的HeLa细胞出现凋亡现象。结论：提示A-环开环可能是导致桉叶烷型倍半萜内酯的体外抑制肿瘤细胞增殖作用消失或减弱的原因；异土木香内酯抑制肿瘤细胞增殖作用有可能是通过诱导肿瘤细胞凋亡机制而实现的。

Study of the anti-proliferative activity and mechanism of three sesquiterpene compounds on gynecologic tumor cell lines

OBJECTIVE:Three sesquiterpene lactones 1-O-acetylbritannilactone,isoalantolactone and britannilactone were isolated from the roots of Inula helenium and the flowers of Inula japonica.The antitumor activities of the three sesquiterpenoids in the cell lines of HeLa,HEC-1,SHIN3,HOC-21 and HAC-2 were measured,and the relationship between structure and activity and the possible mechanisms were explored.METHODS:The effect of three sesquiterpene lactones on five cell lines was measured by MTT assay in vitro.The ap...