SELECTION OF IMMUNE CELLS USING PEPTIDE MHC COMPLEXES GENERATED BY CONDITIONAL LIGAND EXCHANGE

    公开(公告)号:US20240358831A1

    公开(公告)日:2024-10-31

    申请号:US18685736

    申请日:2022-08-24

    Abstract: The present invention relates to a method for selecting an immune cell expressing on its surface an antigen-binding protein specifically binding to a complex of a peptide A (PA) and a Major Histocompatibility Complex (MHC) molecule, comprising the steps of (i) providing a plurality of immune cells expressing different antigen-binding proteins; (ii) contacting the plurality of immune cells with a first composition comprising a complex 1A, comprising a MHC molecule 1 (M1) and a peptide A (PA), and a complex 1X, comprising M1 and a peptide B (PB); (iii) contacting the plurality of immune cells with a second composition comprising a complex 2A, comprising a MHC molecule 2 (M2) and PA, and a complex 2X, comprising M2 and a peptide C (PC); (iv) selecting from the plurality of immune cells a cell expressing an antigen binding protein that specifically binds to complex 1A, wherein complexes 1X and 2X, but not 1A and 2A, dissociate upon stimulation with a defined chemical or physical stimulus; and wherein the amino acid sequences of PB and PC differ in at least one amino acid. The invention further relates to an immune cell selected by the method according to the invention, a method of treatment using said immune cell, a kit for selecting a cell expressing on its surface an antigen-binding protein, and a peptide suitable for use in the method according to the invention.

    ANTIGEN BINDING PROTEINS SPECIFICALLY BINDING CT45

    公开(公告)号:US20250122302A1

    公开(公告)日:2025-04-17

    申请号:US18989486

    申请日:2024-12-20

    Abstract: The present invention provides an antigen binding protein specifically binding to a CT45 antigenic peptide that is in a complex with a major histocompatibility complex (MHC) protein, wherein the CT45 antigenic peptide comprises or consists of the amino acid sequence of SEQ ID NO: 138 (KIFEMLEGV) and wherein the antigen binding protein comprises a first polypeptide comprising a variable domain VA comprising complementarity determining regions CDRa1, CDRa2 and CDRa3 and a second polypeptide comprising a variable domain VB comprising CDRb1, CDRb2 and CDRb3. Also provided are nucleic acids encoding the antigen binding proteins, vectors comprising the nucleic acids, recombinant cells expressing the antigen binding proteins and pharmaceutical compositions comprising the antigen binding proteins. The invention further provides the antigen binding proteins for use in medicine and a method of producing the antigen binding protein.

Patent Agency Ranking