The present invention generally relates to novel protease-activatable T cell activating bispecific molecules and idiotype-specific polypeptides. The present invention also relates to polynucleotides encoding such protease-activatable T cell activating bispecific molecules and idiotype-specific polypeptides, and vectors and host cells comprising such polynucleotides. The invention further relates to methods for producing the protease-activatable T cell activating bispecific molecules and idiotype-specific polypeptides of the invention, and to methods of using these protease-activatable T cell activating bispecific molecules and idiotype-specific polypeptides in the treatment of disease.

Herein is reported an IgG class Fc-region comprising a first variant Fc-region polypeptide and a second variant Fc-region polypeptide, wherein the first variant Fc-region polypeptide is derived from a first parent IgG class Fc-region polypeptide and the second variant Fc-region polypeptide is derived from a second parent IgG class Fc-region polypeptide, whereby the first parent IgG class Fc-region polypeptide is identical to or different from the second parent IgG class Fc-region polypeptide, and the first variant Fc-region polypeptide differs from the second variant Fc-region polypeptide in one or more amino acid residues other than those amino acid residues in which the first parent IgG class Fc-region polypeptide differs from the second parent IgG class Fc-region polypeptide, and the IgG class Fc-region comprising the first variant Fc-region polypeptide and the second variant Fc-region polypeptide has an affinity to a human Fc-receptor that is different than that of an IgG class Fc-region comprising the first parent IgG class Fc-region polypeptide of a) and the second parent IgG class Fc-region polypeptide of a).

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 disclosure relates to antibodies that specifically bind and neutralize interleukin-1β (IL-1β), and to the use of such antibodies for the therapeutic treatment of IL-1β-mediated diseases and disorders.

The present invention provides anti-CD137 constructs that bind to CD137, including multispecific anti-CD137 antibodies with binding specificity for CD137 and one or more additional antigen, and methods of using the same. In certain embodiments, the one or more additional antigen comprises epidermal growth factor receptor (EGFR).

Described herein are anti-CD30L antibodies and pharmaceutical compositions for the treatment of autoimmune diseases and disorders such inflammatory bowel disease (IBD), including Crohn's Disease (CD) and ulcerative colitis (UC).

A novel antibody-pyrrolodiazepine derivative and a novel antibody-pyrrolodiazepine derivative conjugate using the same, comprising substituted benzo[e]pyrrolo[1,2-a][1,4]diazepines represented by the [Formula 24], [Formula 25], [Formula 26], and/or [Formula 27].

The present disclosure relates to, inter alia, antibodies, or antigen-binding fragments thereof, that bind to C5a and to use of the antibodies in methods for treating or preventing complement-associated disorders such as, but not limited to, atypical hemolytic uremic syndrome, age-related macular degeneration, rheumatoid arthritis, sepsis, severe burn, antiphospho lipid syndrome, asthma, lupus nephritis, Goodpasture's syndrome, and chronic obstructive pulmonary disease.

An object of the present invention is to provide an antibody composition, which exhibits an effector function more specifically for a target cell coexpressing two types of antigens that are different from each other and damages the target cell, and also can maintain affinity for the individual target antigens sufficiently high. The present invention relates to an antibody composition against a first antigen and a second antigen that are different from each other, including a first IgG half-molecule and a second IgG half-molecule and relates to the first IgG half-molecule and the second IgG half-molecule constituting the antibody composition.

Provided in the present invention are an anti-CD73 antibody and the use thereof. Specifically, a heavy chain variable region of the antibody contains HCDR1 to HCDR3 having amino acid sequences as shown in SEQ ID NOs: 15-17, respectively. Furthermore, a light chain variable region of the antibody contains LCDR1 to LCDR3 having amino acid sequences as shown in SEQ ID NOs: 18-20, respectively.