| 应用 |
不可逆转地的结合到DNA拓扑异构酶I复合物上，影响细胞周期进程 |
| 产品介绍 |
微溶于乙醇、氯仿，难溶于水。与酸不能生成稳定的盐，与氢氧化钠溶液加热反应可生成钠盐而溶于水。钠盐水溶液黄色澄明具蓝色荧光 |
| 生化机理 |
(S)-(+)-Camptothecin binds irreversibly to the DNA-topoisomerase I complex, inhibiting the reassociation of DNA after cleavage by topoisomerase I and traps the enzyme in a covalent linkage with DNA. The enzyme complex is ubiquinated and destroyed by the 26S proteasome, thus depleting cellular topoisomerase I. Blocks the cell cycle in S-phase at low does and induces apoptosis in a large number of normal and tumor cell lines by cell cycle-dependent and cell cycle-independent processes. |
| 别名 |
喜树碱;4-乙基-4-羟基-1H-吡喃[3'，4'：6，7]氮茚[1，2]喹啉-3，14(4H，12H)-二酮4-Ethyl-4-hydroxy-1H-pyrano-[3',4':6,7]indolizino[1,2-b]quinoline-3,14(4H,12H)-dione |
