The present invention relates to immunoglobulin single variable domains that bind GITR and more in particular to polypeptides that comprise or essentially consist of one or more such immunoglobulin single variable domains; to nucleic acids encoding such polypeptides; to methods for preparing such polypeptides; to compositions and in particular to pharmaceutical compositions that comprise such polypeptides, for prophylactic, therapeutic or diagnostic purposes. In particular, the polypeptides of the present invention enhance the biological activity of GITR.

Disclosed is an anti-IL-4R single-domain antibody and the use thereof. In particular, disclosed are a IL-4R single-domain antibody and a VHH chain thereof, a coding sequence encoding the above-mentioned single-domain antibody or the VHH chain thereof, a corresponding expression vector, host cells capable of expressing the single-domain antibody, and a method for producing the single-domain antibody. The single-domain antibody can specifically recognize human and marmoset IL-4R, but does not recognize mouse IL-4R, and the specificity is good; the single-domain antibody can effectively inhibit the proliferation of TF-1 cells and the activation of a pSTAT6 signaling pathway in cells.

The present disclosure relates generally to compositions and methods useful for the production of engineered antibodies having (i) multiple antigen-binding specificities and (ii) Fc regions that have been modified to promote heterodimer formation between heavy chains from antibodies with different specificities. Also provided are recombinant cells, recombinant nucleic acids encoding such engineered antibodies, as well as pharmaceutical compositions containing same.

The present invention relates to novel tri-specific binding molecules. The invention also relates to nucleic acids encoding such binding molecules; to methods for preparing such binding molecules; to host cells expressing or capable of expressing such binding molecules; to compositions comprising such binding molecules; and to uses of such binding molecules or such compositions, in particular for therapeutic purposes in the field of cancer diseases.

This disclosure provides a multimeric hepatitis B virus (HBV) protein binding molecule, e.g., a dimeric IgA or a pentameric or hexameric IgM binding molecule, comprising at least two bivalent binding units, or variants or fragments thereof, each comprising at least two antibody heavy chain constant regions or fragments thereof, wherein each heavy chain constant region or fragment thereof is associated with an HBV antigen binding domain. The disclosure also provides compositions comprising the multimeric binding molecules, polynucleotides encoding the multimeric binding molecules, and methods to make and use the multimeric binding molecules.

The present disclosure discloses a method for expressing and preparing a bivalent bispecific antibody. In the present disclosure, each portion of a bivalent bispecific antibody and an immune hybrid protein thereof is respectively expressed in a suitable prokaryotic or eukaryotic cell system, separated and purified by high-performance affinity chromatography, and then spliced in vitro by trans-splicing reaction mediated by an intein, to prepare the bivalent specific antibody and an immune hybrid protein thereof.

Disclosed herein are inducible monovalent target-binding proteins which are activated upon protease cleavage. Pharmaceutical compositions comprising the binding proteins disclosed herein and methods of using such formulations are further provided.

Disclosed herein are multivalent and multispecific binding proteins, methods of making the binding proteins, and their uses in the diagnosis, monitoring, inhibition, prevention and/or treatment of cancers, tumors, and/or other angiogenesis-dependent diseases diseases characterized by aberrant DLL4 and/or VEGF expression or activity.

This disclosure provides multimeric binding molecules that bind to a human coronavirus, e.g., MERS-CoV, SARS-CoV or SARS-CoV-2. This disclosure also provides compositions comprising the multimeric binding molecules, polynucleotides that encode the multimeric binding molecules, and host cells that can produce the binding molecules. Further this disclosure provides methods of using the multimeric binding molecules, including methods for treating and preventing human coronavirus disease, e.g., coronavirus disease 2019 (COVID-19).

Provided are anti-CD33 antibody agents, including anti-CD33 antibody agents in an IgG-scFv format. Various methods and reagents related thereto are also provided, including for example for the detection, prevention, and/or therapeutical treatment of CD33-related diseases, in particular, leukemias such as AML.