Due to the obvious adverse effects of 5-fluorouracil that limit its clinical usefulness and considering the diverse biological activities of pentacyclic triterpenes, twelve pentacyclic triterpene-5-fluorouracil conjugates were synthesized and their antitumor activities were evaluated. The results indicated that all the single substitution targeted hybrids (7a–12a) possessed much better antiproliferative
由于5-
氟尿
嘧啶的明显不良反应限制了其临床用途,并考虑到五环三萜的多样化
生物活性,合成了12种五环三萜-5-
氟尿
嘧啶缀合物并评价了其抗肿瘤活性。结果表明,所有单取代靶向杂交体(7a-12a)都比双取代靶向杂交体(7b-12b)具有更好的抗增殖活性。Hybrid 12a对所有测试的 MDR
细胞系均表现出良好的抗增殖活性。此外,研究还发现12a可以诱导细胞内
钙离子内流,产生ROS,将细胞增殖阻滞在G1期,并激活凋亡信号caspase-8,最终激活凋亡效应子caspase-3,引起后期的核细胞凋亡。细胞凋亡。