申请人:Sunamoto Junzo
公开号:US20070042970A1
公开(公告)日:2007-02-22
Folate modified cholesterol-bearing pullulan (FA-CHP) was synthesized by the reaction of folic acid γ-2-aminoethylamide and 4-nitorophenyl chloroformate-activated cholesterol-bearing pullulan, wherein folate and pullulan are connected through a NH—CH
2
—CH
2
—NH group. Approximately 0.5-1 folates are connected per about 100 glycoside units of pullulan. Then, several combinations of FA-CHP, cholesterol-bearing pullulan (CHP) and doxorubicin (DOX) mixture were tested for cancer selective cytotoxicity. A mixture of FA-CHP, CHP and DOX of 1:4:0.02 (weight ratio) gave sharp and selective damage to cells of a human epidermoid cancer KB known as expressing a high level of folate receptor. The same mixture inhibited the growth of HuH7 cells, which is a human hepatocellular carcinoma and is unknown as a folate receptor.
叶酸修饰的胆固醇载体泊洛聚糖(FA-CHP)是通过叶酸γ-2-氨基乙酰胺和4-硝基苯基氯甲酸酯活化的胆固醇载体泊洛聚糖反应合成的,其中叶酸和泊洛聚糖通过一个NH—CH2—CH2—NH基团连接。每约100个葡糖苷单元中连接了大约0.5-1个叶酸。然后,对叶酸修饰的胆固醇载体泊洛聚糖(FA-CHP)、胆固醇载体泊洛聚糖(CHP)和阿霉素(DOX)混合物进行了多种组合的癌症选择性细胞毒性测试。FA-CHP、CHP和DOX的混合物比例为1:4:0.02(重量比)对人表皮癌KB细胞具有高叶酸受体表达水平的细胞造成了明显和选择性的损伤。同样的混合物抑制了HuH7细胞的生长,这是一种人类肝细胞癌,并且未知是否具有叶酸受体。