Cross-species-specific single domain bispecific single chain antibody

    公开(公告)号:US11987633B2

    公开(公告)日:2024-05-21

    申请号:US17204166

    申请日:2021-03-17

    IPC分类号: C07K16/18 C07K16/28

    摘要: The present invention relates to a bispecific single chain antibody molecule comprising a first binding domain consisting of one antibody variable domain capable of binding to an epitope of the human and non-chimpanzee primate CD3 epsilon chain, wherein the epitope is part of an amino acid sequence comprised in the group consisting of SEQ ID NOs. 2, 4, 6, and 8, and a second binding domain capable of binding to an epitope of a human and a non-chimpanzee primate tumor target antigen. The invention further relates to a bispecific single chain antibody molecule comprising a first binding domain capable of binding to an epitope of human and non-chimpanzee primate CD3ε (epsilon) chain, wherein the epitope is part of an amino acid sequence comprised in the group consisting of SEQ ID NOs. 2, 4, 6, and 8, and a second binding domain consisting of one antibody variable domain capable of binding to an epitope of a human and a non-chimpanzee primate tumor target antigen. The invention also provides nucleic acids encoding said bispecific single chain antibody molecule as well as vectors and host cells and a process for its production. The invention further relates to pharmaceutical compositions comprising said bispecific single chain antibody molecule and medical uses of said bispecific single chain antibody molecule.

    PROLONGED ADMINISTRATION OF A BISPECIFIC ANTIBODY CONSTRUCT BINDING TO CD33 AND CD3

    公开(公告)号:US20210301017A1

    公开(公告)日:2021-09-30

    申请号:US17264373

    申请日:2019-07-29

    IPC分类号: C07K16/28 A61K45/06 A61P35/02

    摘要: The present invention provides a bispecific antibody construct comprising a first binding domain specifically binding to a target such as CD33 and a second binding domain specifically binding to an effector such as CD3 for use in a method for the treatment of myeloid leukemia, wherein the construct is administered in one or more treatment cycles of more than 14 days applying a step dosing comprising at least two steps, a treatment cycle optionally followed by a period without administration of the construct. Moreover, the invention provides a method for the treatment of myeloid leukemia comprising the administration of a therapeutically efficient amount of such bispecific antibody construct and the use of such bispecific antibody construct for the preparation of a pharmaceutical composition for the treatment of myeloid leukemia.