Development of lipophilic prodrugs of mitomycin C. III. Physicochemical and biological properties of newly synthesized alkoxycarbonyl derivatives.
摘要:
研究人员合成了五种丝裂霉素 C 的烷氧羰基衍生物,这些衍生物具有不同的亲脂原基,包括苄氧羰基、丙氧羰基、戊氧羰基、壬氧羰基和胆绿羰基,并考察了它们的理化和生物学特性。根据其原分子结构的不同,所有化合物的辛醇/水分配系数、高效液相色谱亲脂指数(k'o)和脂溶性都有不同程度的增加。它们对大肠杆菌 B 仅表现出轻微的抗菌活性,但除胆绿羰基丝裂霉素 C 外,所有化合物在体内对 L1210 白血病系统均表现出相对较低剂量范围内的显著活性。这些衍生物在大鼠血浆和肝匀浆中显示出酶介导的母体化合物转化,而在中性水介质中化学性质稳定。在这些生物活化现象中观察到了物种差异。这些结果表明了这些衍生物作为亲脂性原药的潜在用途。
Five alkoxycarbonyl derivatives of mitomycin C possessing various lipophilic pro-moieties including benzyloxycarbonyl, propyloxycarbonyl, pentyloxycarbonyl, nonyloxycarbonyl, and cholesteryloxycarbonyl groups were synthesized and their physicochemical and biological characteristics were examined. All compounds showed increases of octanol/water partition coefficients, lipophilic indexes (k'o) in HPLC, and lipid solubilities to various degrees depending on their pro-moiety structure. They showed only slight antimicrobial activities against Escherichia coli B, but all the compounds except for cholesteryloxycarbonyl mitomycin C showed significant activity in vivo against a L1210 leukemia system at a relatively low dose range. These derivatives showed enzyme-mediated conversion to the parent compound in rat plasma and liver homogenate, while they were chemically stable in neutral aqueous media. Essentially no bioactivation was observed for cholesteryloxycarbonyl mitomycin C. Species differences were observed in these bioactivation phenomena. These results suggested the potential utility of the derivatives as lipophilic prodrugs.
研究人员合成了五种丝裂霉素 C 的烷氧羰基衍生物,这些衍生物具有不同的亲脂原基,包括苄氧羰基、丙氧羰基、戊氧羰基、壬氧羰基和胆绿羰基,并考察了它们的理化和生物学特性。根据其原分子结构的不同,所有化合物的辛醇/水分配系数、高效液相色谱亲脂指数(k'o)和脂溶性都有不同程度的增加。它们对大肠杆菌 B 仅表现出轻微的抗菌活性,但除胆绿羰基丝裂霉素 C 外,所有化合物在体内对 L1210 白血病系统均表现出相对较低剂量范围内的显著活性。这些衍生物在大鼠血浆和肝匀浆中显示出酶介导的母体化合物转化,而在中性水介质中化学性质稳定。在这些生物活化现象中观察到了物种差异。这些结果表明了这些衍生物作为亲脂性原药的潜在用途。