The present invention addresses the problem of providing an anti-ROR1 monoclonal antibody that is taken in a cancer cell with ROR1 during endocytosis of the cancer cell. This problem can be solved by an anti-ROR1 monoclonal antibody that recognizes the amino acid sequence from position 156 to 300 of human ROR1 protein (GenBank accession No. NP_005003.2) as an epitope.

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.

Antibodies that bind specifically to glycosylated PD-L1 relative to unglycosylated PD-L1, block binding of PD-L1 to PD-1 and promote internalization and degradation of PD-L1 are provided. Antibodies that recognize specific epitopes on glycosylated PD-L1 protein and that exhibit the dual functions of both blocking the binding of PD-L1 to PD-1 and also facilitating the internalization of PD-L1 on cells are provided. In some aspects, PD-L1 polypeptides comprising glycosylated amino acid residues at amino and carboxy terminal positions of the PD-L1 extracellular domain are also provided. Methods for using such antibodies for the treatment of cancer, particularly PD-L1 positive cancer, are also provided.

Methods and compounds for conferring site-specific or local immune privilege.

The present disclosure is directed to antibodies binding to and neutralizing henipavirus and methods for use thereof. Thus, in accordance with the present disclosure, there is provided a method of detecting a henipavirus infection in a subject comprising (a) contacting a sample from said subject with an antibody or antibody fragment having clone-paired heavy and light chain CDR sequences from Tables 3 and 4, respectively; and (b) detecting henipavirus in said sample by binding of said antibody or antibody fragment to a henipavirus antigen in said sample.

Herein is reported a polypeptide-polynucleotide-complex as therapeutic agent and its use as tool for the targeted delivery of an effector moiety. The polynucleotide part of the complex is essentially resistant to proteolytic and enzymatic degradation in vivo. Additionally the polypeptide part specifically binds to a compound or structure such as a tissue or organ, a process or a disease. Thus, one aspect as reported herein is a polypeptide-polynucleotide-complex comprising a) a polypeptide specifically binding to a target and conjugated to a first member of a binding pair, b) a polynucleotide linker conjugated at its first terminus to the second member of the binding pair, and c) an effector moiety conjugated to a polynucleotide that is complementary to at least a part of the polynucleotide linker.

The present invention relates to medical combination products comprising (i) at least one antibody construct comprising at least one domain which binds to a target antigen expressed on the surface of a cell and at least one other domain which binds to CD3 as well as (ii) at least one molecule that is inhibitor/antagonist of TNF/TNFR reducing TNF/TNFR signaling and/or an inhibitor/antagonist of IL6/IL6R that reduces IL6/IL6R signaling, wherein a first dose of said inhibitor/antagonist is administered before administration of a first dose of said antibody construct. Furthermore, the invention provides therapeutic and preventive methods and medical uses of said combination products, as well as a kit comprising said at least one antibody construct and at least one antagonist/inhibitor of TNF or IL6 or its cognate receptor, wherein the interaction of said antagonist/inhibitor of TNF or an inhibitor/antagonist of IL6 with its cognate receptor reduces, mitigates, prevents, or treats cytokine release syndrome.

The present application relates to compositions for preventing or treating viral and other microbial infections. In some embodiments, the present application provides chimeric proteins comprising a target-binding moiety that specifically binds to a pathogen that infects through a mucosa, and a positively charged mucoadhesive peptide fragment. Also provided are antibodies and constructs thereof that specifically binds to an S1 subunit of a spike protein of SARS-CoV-2. Compositions comprising the chimeric proteins, antibodies, or constructs described herein are useful for preventing or treating a microbial infection in an individual, such as a coronavirus infection.

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.

Bispecific antibodies which comprise antigen-binding regions binding to two different epitopes of human epidermal growth factor receptor 2 (HER2), and related antibody-based compositions and molecules, are disclosed. Pharmaceutical compositions comprising the antibodies and methods of preparing and using the antibodies are also disclosed.