薯蓣皂苷元衍生物抗肿瘤的构效关系研究

为阐明薯蓣皂苷元衍生物的体外抗肿瘤活性的构效关系,基于Bcl-2蛋白小分子抑制剂的三维药效团模型的各药效点的特点,本研究利用autodock4.2将薯蓣皂苷元衍生物和Bcl-2进行了大量对接及分析,选择性的合成了31个化合物,采用MTT法测定了这些化合物对A375、A549、HepG-2和K562等4个肿瘤细胞株的体外抗肿瘤活性。初步的构效关系研究表明,薯蓣皂苷元失F环的26-位脂肪酸酯、芳香酸酯类衍生物几乎没有活性;薯蓣皂苷元三氮唑溴盐类衍生物均具有较好的体外抗肿瘤活性,且三氮唑上连有较大的疏水基团的衍生物的活性更好;薯蓣皂苷元及其失F环的杂环类、薯蓣皂苷元失F环氨基酸酯类衍生物能形成较强氢键、偶极作用的衍生物的活性更好。

Structure-activity relationship of diosgenin derivatives as Bcl-2 antagonists

The purpose of this paper is to clarify the structure-activity relationship of anti-tumor activity of diosgenin derivatives in vitro.Study has found that diosgenin can inhibit the reproduction of tumor cells by inducing apoptosis and the main target spot of this effect is Bcl-2.Based on the characteristics of pharmacophoric points' of the three-dimensional pharmacophore for Bcl-2 inhibitors,we have docked lots of diosgenin derivatives with Bcl-2,then synthesized 31 compounds of them,finally assessed the ant...