Synthesis and biological evaluation of betulonic acid derivatives as antitumor agents
作者:Sheng-Jie Yang、Ming-Chuan Liu、Qi Zhao、De-Yu Hu、Wei Xue、Song Yang
DOI:10.1016/j.ejmech.2015.04.006
日期:2015.5
Structural modification was performed at the C-28 position of betulonic acid (BetA). Twenty-five BetA derivatives were synthesized, and evaluated for their antitumor activities against MGC-803, PC3, Bcap-37, A375, and MCF-7 human cancer cell lines by MTT assay. Among the derivatives, most of the derivatives had significant antiproliferative ability (IC50 < 19 μM). Compound 3k, the most active compound
novel antitumor candidates, 21 BA-nitrogen heterocyclicderivatives were synthetized, in addition to four intermediates, 23 of which were first reported. Moreover, they were screened for in-vitro cytotoxicity against four tumor cell lines (Hela, HepG-2, BGC-823 and SK-SY5Y) by a standard methylthiazol tetrazolium (MTT) assay. The majority of these derivatives showed much stronger cytotoxic activity than
桦木酸(BA)是五环三萜类化合物家族的明星成员,在抗肿瘤药物开发方面具有广阔的前景。为了开发新的抗肿瘤候选物,除了四种中间体外,还合成了 21 种 BA-氮杂环衍生物,其中 23 种是首次报道的。此外,通过标准甲基噻唑四唑 (MTT) 测定法筛选了它们对四种肿瘤细胞系(Hela、HepG-2、BGC-823 和 SK-SY5Y)的体外细胞毒性。大多数这些衍生物显示出比 BA 强得多的细胞毒活性。值得注意的是,最有效的化合物 7e(其半数抑制浓度 (IC50) 为 2.05 ± 0.66 μM)的体外毒性是 BA 处理的 Hela 的 12 倍。此外,多种荧光染色技术和流式细胞术共同揭示了化合物7e可以诱导Hela细胞的早期凋亡。还简要讨论了构效关系。本研究强调了将氮杂环引入桦木酸在新型抗肿瘤药物的发现和开发中的重要性。