Provided are antibodies that target the cellular efflux pump MDR1. Also provided are pharmaceutical compositions, nucleic acids, recombinant expression vectors, cells, and kits that include or encode such antibodies. Methods of using the antibodies for detecting presence or absence of MDR1 expression in cells, e.g., tumor cells, level of MDR1 expression, and/or inhibiting MDR1 function are also disclosed. In addition, multi-specific antibodies that bind to MDR1 and a tumor associated antigen are provided. Also provided are methods for treating a subject for a cancer that include administering to the subject an anti-MDR1 antibody as disclosed herein or a multi-specific antibody that targets both MDR1 and a tumorassociated antigen.

Multispecific, human heavy chain antibodies (e.g., UniAbs™) that have modified heavy chain constant regions that impart advantageous properties are provided. The invention further concerns methods of making such antibodies, compositions, including pharmaceutical compositions, comprising such antibodies, and their use to treat disorders that are characterized by expression of one or more of the binding targets described herein.

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Multispecific binding proteins that bind NKG2D receptor, CD16, and 5T4 are described, as well as pharmaceutical compositions, formulations, and therapeutic methods of the multispecific binding proteins useful for the treatment of cancer.

Disclosed are antigen binding polypeptides and antigen binding polypeptide complexes (e.g., antibodies and antigen binding fragments thereof) having certain structural features. Also disclosed are polynucleotides and vectors encoding such polypeptides and polypeptide complexes; host cells, chimeric antigen receptors (CARs), immune cells, pharmaceutical compositions and kits containing such polypeptides and polypeptide complexes; and methods of using such polypeptides and polypeptide complexes.

The present invention relates to antibodies targeting LRP6 and compositions and methods of use thereof.

The present invention provides bispecific antibody constructs of a specific Fc modality characterized by comprising a first domain binding to a target cell surface antigen, a second domain binding to an extracellular epitope of the human and/or the Macaca CD3cε chain and a third domain, which is the specific Fc modality. Moreover, the invention provides a polynucleotide, encoding the antibody construct, a vector comprising this polynucleotide, host cells, expressing the construct and a pharmaceutical composition comprising the same.

Described are tetravalent, bispecific EGFR/CD16A antigen-binding proteins for engaging NK-cells towards EGFR-positive cells. EGFR/CD16A antigen-binding proteins with different pharmacokinetic (PK) properties are described. Further described is the use of bispecific EGFR/CD16A antigen-binding proteins for the treatment of an EGFR-positive malignancy, such as EGFR-positive tumors.

Described herein are protein molecules that exhibit activatable target binding in diseased tissues and related nucleic acid molecules, vectors and host cells. Also described herein are medical uses for such protein molecules.

The present invention relates to multispecific antibodies against a novel targets' combination of HVEM and CD9, and their use in the treatment of cancer and infectious diseases.

Disclosed herein are novel bispecific and tri-specific antibodies with increased stability and use thereof for therapy.