The present disclosure provides several embodiments of multi-specific antigen binding protein complexes. In some embodiments, the multi-specific antigen binding protein complex is composed of either two or three polypeptide chains that assemble with each other to form het-erodimeric complexes comprising two different Fab regions each capable of binding two different epitopes and comprising an Fc region which is capable of exhibiting Fc effector function, thus having a relatively simple structure compared to certain other multi-specific antibodies. In one embodiment, the multi-specific antigen binding protein complex is activatable as one of the polypeptide chains that compose the protein complex carries a cleavable linker.

The present disclosure provides improved CLL-1 targeting polypeptides and compositions for adoptive T cell therapies for treating, preventing, or ameliorating at least one symptom of a cancer, infectious disease, autoimmune disease, inflammatory disease, and immunodeficiency, or condition associated therewith.

The invention provides antibodies, antibody-drug conjugates, bispecific T cell engagers (BiTEs), and chimeric antigen receptors (CARs) that target transmembrane activator and calcium modulator and cyclophilin ligand interactor (TACI). Such antibodies, antibody-drug conjugates, BiTEs, and CARs can be used, e.g., in methods for treating a cancer (e.g., multiple myeloma), an autoimmune disorder (e.g., characterized by a high titer of antibodies contributing to the disorder), or a plasma cell disease disorder (e.g., plasma cell dyscrasias) in a subject in need thereof.

A method is described for delivering a single domain antibody or a therapeutic molecule from an apical surface of a polymeric immunoglobulin receptor (pIgR)-expressing cell to a basolateral surface of the pIgR-expressing cell comprising contacting the pIgR-expressing cell with the single domain antibody or the therapeutic molecule, wherein the single domain antibody binds to pIgR, and the therapeutic molecule comprises an agent and the single domain antibody. A method is also described for transporting such a therapeutic molecule to systemic circulation or lamina propria or gastrointestinal tract of a subject comprising administering the therapeutic molecule to the subject via oral delivery, buccal delivery, nasal delivery or inhalation delivery.

The present invention relates to the treatment of IgE mediated diseases using an anti-IgE antibody. In particular, the anti-IgE antibody is a multifunctional antibody against IgE, which neutralizes IgE and inhibits IgE synthesis. Specifically, the treatment of the present invention is effective in providing a rapid and/or sustained suppression of disease symptoms.

A therapeutic agent capable of binding to the receptor CLPTM1 at the surface of an immune cell and modulating its activity for use in modulating the activity of the immune system to treat cancer, wherein the therapeutic agent is capable of inhibiting the growth and/or viability of an anti-inflammatory and/or immunosuppressive cell to relieve unwanted or deleterious immunosuppression by eliminating anti-inflammatory and/or immunosuppressive immune cells; and/or the therapeutic agent is capable of stimulating an antigen-presenting immune cell and acts to stimulate antigen-presenting immune cells to activate an anti-cancer immune response.

Anti-CCL8 antibodies and antigen binding fragments thereof are described. Antibodies and fragments thereof can be used for prevention of migration of breast cancer cells. Methods include delivery of an anti-CCL8 antibody or an antigen binding fragment thereof to an area including the breast cancer cells, e.g., delivery to a subject in need thereof in an effective amount.

The present disclosure provides anti-LAG-3 heavy-chain antibody or the antigen-binding domain thereof, isolated polynucleotides encoding the same, pharmaceutical compositions comprising the same, and the uses thereof.

Disclosed are antibodies and fragments thereof that target the A-domain of Neuropilin-1 (Nrp1A). Also disclosed are methods of using the anti-Nrp1A antibodies for the treatment of various diseases or disorders.

The disclosure relates to an anti-VEGF-PD1 bispecific antibody with a novel structure and a use thereof, which belongs to the technical field of molecular immunology. The CDR-H1 in the heavy chain variable region of the antibody is an amino acid sequence expressed by SEQ ID NO: 1, the CDR-H2 is an amino acid sequence expressed by SEQ ID NO: 2, the CDR-H3 is an amino acid sequence expressed by SEQ ID NO: 3, and the CDR-L in the light chain variable region of the antibody is an amino acid sequence expressed by SEQ ID NO:4.