Synthesis and Antitumor Efficacy of a β-Glucuronidase-Responsive Albumin-Binding Prodrug of Doxorubicin

In this paper we describe the synthesis and biological evaluation of the first β-glucuronidase-responsive albumin-binding prodrug designed for the selective delivery of doxorubicin at the tumor site. This prodrug leads to superior antitumor efficacy in mice compared to HMR 1826, a well-known glucuronide prodrug of doxorubicin that cannot bind covalently to circulating albumin. Furthermore, this compound inhibits tumor growth in a manner similar to that of doxorubicin while avoiding side effects induced by the free drug