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    • 8. 发明授权
    • Heterocyclic self-immolative linkers and conjugates
    • 杂环自我消失的接头和共轭体
    • US07375078B2
    • 2008-05-20
    • US11064785
    • 2005-02-22
    • Bainian Feng
    • Bainian Feng
    • A61K38/00
    • C07D277/46A61K38/00A61K47/65C07D417/12C07K5/06052
    • The present invention provides heterocyclic linker compounds useful for linking drug moieties to ligands. The compounds also include drug-ligand conjugates comprising a ligand capable of targeting a selected cell population, and a drug connected to the ligand by a heterocyclic linker moiety. The linker moiety comprises a peptide sequence that is a substrate for an intracellular enzyme, for example a cathepsin, that cleaves the peptide at an amide bond. The peptide further contains a self-immolating moiety which connects the drug and the protein peptide sequence. Upon cleavage of the peptide sequence by an intracellular enzyme the self-immolating moiety cleaves itself from the drug moiety such that the drug moiety is in an underivatized and active form.
    • 本发明提供了可用于将药物部分与配体连接的杂环连接体化合物。 化合物还包括药物 - 配体缀合物,其包含能够靶向所选细胞群体的配体,以及通过杂环连接体部分与配体连接的药物。 连接体部分包含肽序列,其是细胞内酶的底物,例如组织蛋白酶,其在酰胺键处切割肽。 该肽还含有连接药物和蛋白质肽序列的自分离部分。 通过细胞内酶切割肽序列后,自我脱除部分自身从药物部分切割,使得药物部分处于未衍生的和活性的形式。