Design, characterization, and in vitro antiproliferative efficacy of gemcitabine conjugates based on carboxymethyl glucan
作者:Lu Ma、Yuancai Chen、Xude Wang、Mingzhou Xiong、Yuanyuan Sun、Xiaoshu Zhang、Yuqing Zhao
DOI:10.1016/j.bmcl.2018.07.014
日期:2018.9
5.5) mimicking the acidic tumor microenvironment. Moreover, A549, HeLa and Caco-2 cancer cell lines were used to evaluate the in vitro cytotoxicity of conjugates and the results showed that binding GEM to CMG significantly enhanced antiproliferative activity of GEM on A549 cells. Therefore, these conjugates may be potentially useful as a delivery vehicle in cancer therapy and worthy of further study
吉西他滨(GEM)在临床实践中广泛用于治疗癌症和其他几种实体瘤。尽管如此,GEM的抗肿瘤作用仍受到某些限制的部分阻止,这些限制包括半衰期短和缺乏肿瘤定位。羧甲基葡聚糖(CMG)是β-(1-3)-葡聚糖的羧甲基化衍生物,具有生物相容性和生物降解性,并具有潜在的抗癌作用。为了增强的抗增殖活性GEM,四个水溶性轭合物GEM经由多样结合至CMG氨基酸接头设计并合成。1个使用1 H NMR,FT IR,元素分析和RP-HPLC色谱法验证结合物的正确实现。体外释放研究表明,缀合物在生理缓冲液(pH 7.4)中的释放要比模仿酸性肿瘤微环境的酸性缓冲液(pH 5.5)的释放慢。此外,使用A549,HeLa和Caco-2癌细胞系评估缀合物的体外细胞毒性,结果表明,将GEM与CMG结合可显着增强GEM对A549细胞的抗增殖活性。因此,这些缀合物可能潜在地用作癌症治疗中的递送载体,并且值得进一步研究其体内外的结