DOSAGES OF IMMUNOCONJUGATES OF ANTIBODIES AND SN-38 FOR IMPROVED EFFICACY AND DECREASED TOXICITY

    公开(公告)号:EP4035689A1

    公开(公告)日:2022-08-03

    申请号:EP22156351.3

    申请日:2013-07-23

    申请人: Immunomedics Inc.

    摘要: The present invention relates to therapeutic immunoconjugates comprising SN-38 attached to an antibody or antigen-binding antibody fragment. The antibody may bind to EGP-1 (TROP-2), CEACAM5, CEACAM6, CD74, CD19, CD20, CD22, CSAp, HLA-DR, AFP or MUC5ac and the immunoconjugate may be administered at a dosage of between 4 mg/kg and 24 mg/kg, preferably 4, 6, 8, 9, 10, 12, 16 or 18 mg/kg. When administered at specified dosages and schedules, the immunoconjugate can reduce solid tumors in size, reduce or eliminate metastases and is effective to treat cancers resistant to standard therapies, such as radiation therapy, chemotherapy or immunotherapy.

    CONJUGATES WITH AN INTRACELLULARLY-CLEAVABLE LINKAGE

    公开(公告)号:EP3939617A1

    公开(公告)日:2022-01-19

    申请号:EP21189065.2

    申请日:2009-12-02

    摘要: The present invention relates to a process for preparing a CL2A-SN-38 compound, comprising: (a) derivatizing an SN-38 drug with a first linker, wherein the first linker contains a reactive moiety that is capable of combining with a second linker, a PEG moiety comprising 8 monomeric subunits, a lysine amino acid spacer between the drug and the first linker, and a carbonate intracellularly-cleavable moiety, which is cleavable by intracellular peptidases or cleavable by the low pH environment of endosomal and lysosomal vesicles; (b) providing a second linker, which contains a targeting-moiety-coupling group, which is a maleimide group, and further contains a reactive group capable of reacting with the drug-first linker conjugate; and (c) reacting the second linker with the drug-first linker conjugate by a copper (+1) ion-catalyzed acetylene-azide cycloaddition reaction, to produce a compound having a structure represented by: