Chemo-Enzymatic Synthesis of Ester-Linked Docetaxel-Monosaccharide Conjugates as Water-Soluble Prodrugs
作者:Kei Shimoda、Naoji Kubota
DOI:10.3390/molecules16086769
日期:——
Three new docetaxel prodrugs, i.e., 7-propionyldocetaxel 3''-O-b-D-glycopyranosides, which contain ester-linked monosaccharides, were synthesized by a chemo-enzymatic procedure involving enzymatic transglycosylations with lactase, b-galactosidase, or b-xylosidase. The water-solubility of 7-propionyldocetaxel 3''-O-b-D-glucopyranoside was 52-fold higher than that of docetaxel. 7-Propionyldocetaxel 3''-O-b-D-glucopyranoside and 7-propionyldocetaxel 3''-O-b-D-xylopyranoside were effectively hydrolyzed by the relevant enzyme(s) of human cancer cells to release docetaxel, whereas 7-propionyldocetaxel 3''-O-b-D-galactopyranoside was relatively resistant under similar conditions. 7-Propionyldocetaxel 3''-O-b-D-glucopyranoside and 7-propionyldocetaxel 3''-O-b-D-xylopyranoside showed in vitro cytotoxic activity against human cancer cells, whereas 7-propionyldocetaxel 3''-O-b-D-galactopyranoside exerted low cytotoxicity.
合成了三种新的多西紫杉醇前药,即7-丙酰基多西紫杉醇3''-O-b-D-葡萄糖苷,这些前药含有酯键连接的单糖。通过化学-酶法程序合成了这些前药,该程序涉及用乳糖酶、β-半乳糖苷酶或β-木糖苷酶进行的酶促糖基转移。7-丙酰基多西紫杉醇3''-O-b-D-葡萄糖苷的水溶性比多西紫杉醇高52倍。7-丙酰基多西紫杉醇3''-O-b-D-葡萄糖苷和7-丙酰基多西紫杉醇3''-O-b-D-木糖苷被人类癌细胞相关酶有效水解以释放多西紫杉醇,而7-丙酰基多西紫杉醇3''-O-b-D-半乳糖苷在相似条件下则相对耐水解。7-丙酰基多西紫杉醇3''-O-b-D-葡萄糖苷和7-丙酰基多西紫杉醇3''-O-b-D-木糖苷在体外显示出对人类癌细胞的细胞毒性活性,而7-丙酰基多西紫杉醇3''-O-b-D-半乳糖苷的细胞毒性较低。