Taking orostanal (a compound from a Japanese marine sponge, Stelletta hiwasaensis) as a lead compound, some novel B-norcholesteryl benzimidazole and benzothiazole derivatives were synthesized. The antiproliferative activity of the compounds against human cervical carcinoma (HeLa), human lung carcinoma (A549), human liver carcinoma cells (HEPG2) and normal kidney epithelial cells (HEK293T) was assayed. The results revealed that the benzimidazole group was a better substituent than benzothiazole group for increasing the antiproliferative activity of compounds. 2-(3β′-Acetoxy-5β′-hydroxy-6′-B-norcholesteryl)benzimidazole (9b) with the structure of 6-benzimidazole displays the best antiproliferative activity to the cancer cells in all compounds, but is almost inactive to normal kidney epithelial cells (HEK293T). The assay of compound 9b to cancer cell apoptosis by flow cytometry showed that the compound was able to effectively induce cancer cell apoptosis. The research provided a theoretical reference for the exploration of new anti-cancer agents and may be useful for the design of novel chemotherapeutic drugs.
以日本海洋海绵Stelletta hiwasaensis中的化合物orostanal为先导化合物,合成了一系列新型B-nor
胆固醇基
苯并咪唑和
苯并噻唑衍
生物。对这些化合物对人宫颈癌(HeLa)、人肺癌(A549)、人肝癌(HE
PG2)细胞和人正常肾上皮细胞(HEK293T)的抗增殖活性进行了检测。结果表明,
苯并咪唑类衍
生物比
苯并噻唑类衍
生物具有更好的取代基效应,能更有效地提高化合物的抗增殖活性。其中,具有6-
苯并咪唑结构的2-(3β′-
乙酸氧基-5β′-羟基-6′-B-nor
胆固醇基)
苯并咪唑(9b)在所有化合物中对癌细胞显示出最佳的抗增殖活性,但对正常肾上皮细胞(HEK293T)几乎无效。通过流式细胞术检测化合物9b对癌细胞凋亡的影响,结果显示该化合物能够有效诱导癌细胞凋亡。本研究为寻找新型抗癌药物提供了理论参考,并可能对设计新型化疗药物具有指导意义。