A group of functionalized linking agents are disclosed. The linking agents contain thiol reactive functionalities for the covalent reaction with sulfhydryl groups from the hinge-region of antibody fragments. The linking agents also contain masked aldehyde functionalities for covalent attachment of amine-containing therapeutic agents by Schiff base formation. Carrier systems capable of delivering compounds to targeted sites in vivo based on antigen-antibody interactions are constructed from these linking agents.
本发明涉及一组功能化连接剂。连接剂包含
硫醇反应性功能基团,用于与
抗体片段铰链区域的巯基发生共价反应。连接剂还包含掩蔽醛功能基团,通过席夫碱形成与含
氨治疗剂的共价结合。基于抗原-
抗体相互作用的载体系统是由这些连接剂构建的,能够在体内将化合物传递到靶向位点。