Disclosed is a multi-arm targeting drug conjugate modified by a water-soluble polymer; the drug conjugate has the structural formula of (III). In formula (III), R is an organic core, POLY is a polymer, L is a multivalent linker, T is a targeting molecule, D is a camptothecin-based drug, and q is any integer between 3 and 8. The drug conjugate may improve the poor water solubility, high toxicity and low bioavailability of camptothecin-based drugs.
本发明公开了一种由
水溶性聚合物修饰的多臂靶向药物共轭物;该药物共轭物的结构式为(III)。 式(III)中,R 是有机核,POLY 是聚合物,L 是多价连接体,T 是靶向分子,D 是
喜树碱类药物,q 是 3 到 8 之间的任意整数。 该药物共轭物可改善
喜树碱类药物
水溶性差、毒性大和
生物利用率低的问题。