The present invention relates to multispecific antibodies, for example bispecific antibodies, and methods for the isolation or purification of the same. The antibodies of the invention comprise first and second heavy chain-light chain pairings wherein each pairing comprises a distinct selective recognition site including one or more amino acid residues contributed from the heavy chain and the light chain of the pairing. The first and second selective recognition sites differ by at least one amino acid residue and can be differentially bound by first and second selective recognition agents according to the methods of the invention. Such methods facilitate the production of antibody preparations enriched for multispecific antibodies having the correct functional heavy chain-light chain pairings.

The present application provides GPC2-specific antibodies and antigen binding fragments thereof. A chimeric antigen receptor (CAR) that specifically binds glypican-2 (GPC2) comprising a GPC2-specific antibody, a transmembrane domain, and an intracellular signaling domain. T cells comprising the disclosed CAR constructs can be used for cancer immunotherapy.

The invention relates to a method of immunoaffinity purification which comprises the use of a binding agent which binds to an epitope that it is present at least twice on the target molecule. In another embodiment the method uses at least two different binding agents, each binding to different epitopes on the target molecule.

The present invention relates to a method for engineering an immunoglobulin comprising a variable domain and at least one modification in at least two structural loops of said immunoglobulin and determining the binding of said immunoglobulin to an epitope of an antigen, wherein the unmodified immunoglobulin does not significantly bind to said epitope, comprising the steps of: providing a nucleic acid encoding an immunoglobulin comprising at least two structural loops, modifying at least one nucleotide residue of each of said structural loops, transferring said modified nucleic acid in an expression System, expressing said modified immunoglobulin, contacting the expressed modified immunoglobulin with an epitope, and determining whether said modified immunoglobulin binds to said epitope, immunoglobulins produced by such a method and libraries of immunoglobulins.

The present technology relates generally to dry powder formulations of antibodies specific for thymic stromal lymphopoietin (TSLP), as well as methods of treating asthma, using the dry powder formulations, suitably via pulmonary delivery.

A PD-L1 nano-antibody and a PD-L2 nano-antibody, and a bispecific antibody having both the PD-L1 nano-antibody and the PD-L2 nano-antibody are disclosed. The bispecific antibody can block PD-1/PD-L1 and PD-1/PD-L2 pathways at the same time. The bispecific antibody can reactivate T cells, enhance immune responses, and more effectively improve the inhibitory effect on tumor occurrence and development.

The present disclosure relates to a method for the purification of a human IgG-CH1 domain comprising molecule using an antigen-binding protein that is capable of binding to an epitope that is comprised in the CH1 domain of each of human IgG1, human IgG2, human IgG3 and human IgG4. The disclosure further relates to the antigen-binding proteins that can be used in the method of the disclosure. The frame-work regions of the antigen-binding proteins of the invention preferably correspond to those of antibodies that naturally are devoid of light chains as may e.g. be found in camelids. The disclosure further relates to nucleic acids that encode such antigen-binding proteins, to immunoadsorbent materials that comprise such proteins, and to the uses of such immunoadsorbent materials for the purification of IgG-CH1 domain containing molecules from a variety of species.

The present disclosure is directed to single domain antibodies that bind to tau and the use of these antibodies for the treatment and diagnosis of tauopathies. The present disclosure is also directed to polynucleotides encoding the tau single domain antibodies, therapeutic vectors comprising these polynucleotides and methods of administering these therapeutic vectors for the treatment of tauopathies.

The invention relates to COnditional Bispecific Redirected Activation constructs, or COBRAs, that are administered in an active pro-drug format. Upon exposure to tumor proteases, the constructs are cleaved and activated, such that they can bind both tumor target antigens (TTAs) as well as CD3, thus recruiting T cells expressing CD3 to the tumor, resulting in treatment. In some embodiments, the tumor target antigen is B7H3.

The present invention relates to dimers comprising a first polypeptide and a second polypeptide, wherein each of said first and second polypeptide comprises at least one immunoglobulin single variable domain (1ISVD) and a C-terminal extension comprising a cysteine moiety (preferably at the C-terminus), wherein said first polypeptide and said second polypeptide are covalently linked via a disulfide bond between the cysteine moiety of said first polypeptide and the cysteine moiety of said second polypeptide, in which the dimer outperformed the benchmark constructs, e.g. cognate multivalent and multispecific constructs, in various assays. The present invention provides methods for making the dimers of the invention.