申请人:B & G Partners, LLC
公开号:EP2409708A1
公开(公告)日:2012-01-25
The present invention relates to pharmaceutical compositions containing tumor-selective targeted inhibitor glycoconjugates. These bioconjugates are ALK5 inhibitors covalently bound to biocompatible carrier molecules which selectively target and specifically bind to Muc4 that is overexpressed on a variety of tumor cell types. The ALK5 inhibitors are conjugated to tumor targetable glycans through a covalent linker. Preferably the acid-labile linker is designed to be stable in plasma and releases pharmacologically active inhibitors through acid-catalyzed hydrolysis in the acidic environment of the target tumor where the inhibitor activity is restored. Because the glycoconjugates are stable at physiological pH and in plasma, they advantageously reduce undesirable systemic ALK5 inhibitor activity; however, the preferable glycoconjugates are acid-labile conjugates that can be hydrolyzed upon reaching the more acid environment of the tumor.
本发明涉及含有肿瘤选择性靶向抑制剂糖共轭物的药物组合物。这些生物共轭物是与生物相容性载体分子共价结合的 ALK5 抑制剂,可选择性地靶向和特异性地结合多种肿瘤细胞类型上过度表达的 Muc4。ALK5 抑制剂通过共价连接体与肿瘤靶向性聚糖共轭。最好设计成在血浆中稳定,并在靶向肿瘤的酸性环境中通过酸催化水解释放出具有药理活性的抑制剂,从而恢复抑制剂的活性。由于糖轭合物在生理pH值和血浆中稳定,因此它们能减少不希望出现的全身性ALK5抑制剂活性;然而,优选的糖轭合物是耐酸轭合物,在到达肿瘤的酸性环境时可被水解。