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    • 7. 发明授权
    • Chemically defined polymeric carriers for release of covalently linked
agents
    • 用于释放共价连接剂的化学定义的聚合物载体
    • US5549883A
    • 1996-08-27
    • US71357
    • 1993-06-03
    • Ananthachari SrinivasanVivekananda M. VrudhulaDiana I. Brixner
    • Ananthachari SrinivasanVivekananda M. VrudhulaDiana I. Brixner
    • A61K47/48A61K51/10C07K7/02A61K51/08A61K49/00C07K1/00C07K2/00
    • A61K47/48246A61K51/1093C07K7/02
    • A chemically defined polymeric carrier comprising a series of .alpha.-amino acids in any combination containing side chains to which diagnostic/therapeutic and chelating agents can be covalently joined through cleavable linkers either directly or covalently joined through cleavable linkers after chemical modification of the side chains. Hydrazone, disulfide, and ester linkages in any combination can be present in the polymeric carrier between the side chains of the .alpha.-amino acids and the agents. The presence of a particular covalent linkage between the side chain and the agent in the carrier is determined by the functional group present in the side chain of the .alpha.-amino acid and the functional group present in the agent. The .alpha.-amino acids with side chains to which agents do not covalently join can function as spacers to minimize interaction between bulky molecules attached to the polymeric carrier. In addition, those .alpha.-amino acids with charged or hydrophilic side chains to which agents do not covalently join can provide increased solubility to the polymeric carrier.
    • 一种化学上定义的聚合物载体,其包含任何组合的含有侧链的一系列α-氨基酸,诊断/治疗和螯合剂可以通过侧链化学修饰之后直接或共价连接在可切割接头上,通过可切割接头共价连接。 任何组合中的腙,二硫化物和酯键可以存在于α-氨基酸的侧链与试剂之间的聚合物载体中。 载体中侧链和试剂之间特定共价键的存在由存在于该α-氨基酸的侧链中的官能团和该试剂中存在的官能团来确定。 具有不共价连接的侧链的α-氨基酸可以作为间隔物,以使连接到聚合物载体上的大体积分子之间的相互作用最小化。 此外,具有带电荷或亲水侧链的α-氨基酸与试剂不共价连接的那些可以提供增加的对聚合物载体的溶解度。