Described herein are hybrid antibodies targeted for use in the treatment of cancer. The antibodies have binding capabilities for Fcε receptors and the neonatal Fc receptor, which may be achieved e.g. by replacing sequences or amino acids in IgE constant domain with corresponding sequences and amino acids derived from IgG.

Provided herein are antibodies, recombinant proteins, and methods of use thereof including, for example, immunoglobulin G (IgG) antibodies and recombinant proteins including a Fab region and an Fc region connected through a hinge region, where the hinge region is resistant to cleavage by a protease. Also, provided herein, inter alia, are immunoglobulin G (IgG) antibodies and recombinant proteins including a Fab region and an Fc region connected through a hinge region, and where the Fc region has higher affinity for a ligand compared to a wildtype Fc.

An agent for preventing, suppressing the progression of symptoms of or the recurrence of, and/or treating hematological cancer, including a protein having a first arm specifically binding to PD-1 and a second arm specifically binding to CD3, such as a PD-1/CD3 bispecific antibody or antibody fragment thereof.

It was discovered that antigen-binding molecules comprising (i) a domain that binds to a molecule expressed on the surface of cells having immune response-suppressing functions, and (ii) a T cell receptor complex-binding domain exhibit more superior antitumor effects than conventional antigen-binding molecules by crosslinking T cells with cells having immune response-suppressing functions, and damaging the cells having immune response-suppressing functions.

Provided are antibodies and antigen-binding fragments thereof that specifically bind to human neuropilin-2 (NRP2) polypeptides, including those that modulate binding interactions between human NRP2 and at least one NRP2 ligand, for example, human histidyl-tRNA synthetase (HRS), and which thereby modulate subsequent NRP2-mediated downstream signaling events, including related therapeutic compositions and methods for modulating NRP2 activity and treating diseases such as NRP2-associated diseases.

The invention provides methods and compositions for preparing antibodies and antibody derivatives with reduced core fucosylation.

The present invention discloses the generation of novel variants of Fc domains, including those found in antibodies, Fc fusions, and immuno-adhesions, which have an increased binding to the FcRn receptor and/or increased serum half-life.

The present invention describes novel immunoglobulin compositions that co-engage at least two antigens, e.g. a first and second antigen, or, as outlined herein, three or four antigens can be bound, in some of the scaffold formats described herein. First and second antigens of the invention are herein referred to as antigen-1 and antigen-2 respectively (or antigen-3 and antigen-4, if applicable. As outlined herein, a number of different formats can be used, with some scaffolds relying combinations of monovalent and bivalent bindings.

Described herein are hybrid antibodies targeted for use in the treatment of cancer. The antibodies have binding capabilities for Fcε receptors and Fcγ receptors, which may be achieved e.g. by grafting heavy chain constant domain sequences (e.g. CH2 and CH3 domains) derived from IgG to IgE.

The present disclosure provides anti-CTLA-4 antibodies and methods of producing and using the antibodies. The present disclosure also provides nucleic acids encoding the anti-CTLA-4 antibodies and host cells containing the nucleic acids. Furthermore, the present disclosure provides polypeptides containing a variant Fc region and methods of producing and using the polypeptides.