The present disclosure relates to activatable heteromultimeric bispecific polypeptide complexes (HBPCs) and methods of making and using the same.

The present invention provides a polypeptides comprising a heavy chain domain 2 (HD2) from IgM or IgE and at least one pharmaceutically active moiety, complexes thereof and their use for therapy and prophylaxis.

The present disclosure relates to multispecific molecule comprising a binding domain specific to the antigen CD22 and a binding domain specific to the antigen CD79a and/or CD79b, compositions comprising the same and use of both in treatment, for example the treatment of autoimmune disease.

Isolated or recombinant EphA5 or GRP78 targeting antibodies are provided. In some cases, antibodies of the embodiments can be used for the detection, diagnosis and/or therapeutic treatment of human diseases, such as cancer. A method of rapidly identifying antibodies or antibody fragments for the treatment of cancer using a combination of in vitro and in vivo methodologies is also provided.

The current invention involves a series of fully recombinant multimerized forms of immunoglobulin Fc which thereby present polyvalent immunoglobulin Fc to immune cell receptors. The fusion proteins exist as both homodimeric and highly ordered multimeric fractions, termed stradomers. In comparison to the homodimeric fraction, purified multimeric stradomers have higher affinity and avidity for FcγRs with slower dissociation and are useful in the treatment and prevention of disease. The current invention demonstrates that directly linking IgG1 Fc regions to multimerization domains leads to enhanced multimerization and biological activity.

Provided herein are methods and uses involving antibodies that specifically bind to a KIT receptor tyrosine kinase for managing, treating, or preventing an eosinophil or mast cell related disorder and/or one or more symptoms thereof, for example a mast cell related disorder of the nervous system, e.g., central nervous system, for example neuromyelitis optica (NMO), neuromyelitis optica spectrum disorder (NMOSD), multiple sclerosis (MS), and neurofibromatosis (NF).

Provided herein are anti-Factor IX Padua binding constructs, e.g., antibodies and antigen-binding fragments thereof. Related polypeptides, conjugates and kits are also provided. The inventions may be used in methods of detecting Factor IX Padua in a sample.

The present invention provides bispecific antibodies of an antibody format, and which comprise one or more Fab fragments and an immunoglobulin molecule. The invention further provides compositions of said bispecific antibodies, as well as methods and uses of the same. The invention further provides a method of generating bispecific antibodies of the format.

VH domain, in which: (i) the amino acid residue at position 112 is one of K or Q; and/or (ii) the amino acid residue at position 89 is T; and/or (iii) the amino acid residue at position 89 is L and the amino acid residue at position 110 is one of K or Q; and (iv) in each of cases (i) to (iii), the amino acid at position 11 is preferably V; and in which said VH domain contains a C-terminal extension (X)n, in which n is 1 to 10, preferably 1 to 5, such as 1, 2, 3, 4 or 5 (and preferably 1 or 2, such as 1); and each X is an (preferably naturally occurring) amino acid residue that is independently chosen, and preferably independently chosen from the group consisting of alanine (A), glycine (G), valine (V), leucine (L) or isoleucine (I).

Amino acid sequences are provided that are directed against/and or that can specifically bind protein F of hRSV, as well as to compounds or constructs, and in particular proteins and polypeptides, that comprise or essentially consist of one or more such amino acid sequences. The amino acid sequences, polypeptides and therapeutic compounds and compositions provided by the invention show an improved stability, less immunogenicity and/or improved affinity and/or avidity for protein F of hRSV. The invention also relates to the uses of such amino acid sequences, polypeptides, compounds or constructs for prophylactic and/or therapeutic purposes.