Abstract: Disclosed herein are antibodies and ILT5-binding fragments thereof that specifically bind to ILT5, e.g., human ILT5 (hILT5), and pharmaceutical compositions comprising such ILT5-binding antibodies and ILT5-binding fragments thereof.

Abstract: The present application relates to optimized IgG immunoglobulin variants, engineering methods for their generation, and their application, particularly for therapeutic purposes.

Abstract: The present invention describes antibodies that target CD19, wherein the antibodies comprise at least one modification relative to a parent antibody, wherein the modification alters affinity to an Fcg?R or alters effector function as compared to the parent antibody. Also disclosed are methods of using the antibodies of the invention.

Abstract: Hybrid nuclease molecules and methods for treating an immune-related disease or disorder in a mammal, and a pharmaceutical composition for treating an immune-related disease in a mammal.

Abstract: Provided are binding polypeptides (e.g., antibodies), and drug conjugates thereof, comprising an Fc domain with an altered glycosylation profile and reduced effector function. In particular embodiment, the Fc domain comprises: an asparagine residue at amino acid position 298, according to EU numbering; and a serine threonine residue at amino acid position 300, according to EU numbering. Also provided are nucleic acids encoding the antigen-binding polypeptides, recombinant expression vectors and host cells for making such antigen-binding polypeptides. Methods of using the antigen-binding polypeptides disclosed herein to treat disease are also provided.

Abstract: Methods and compositions involving polypeptides having an aglycosylated antibody Fc domain. In certain embodiments, polypeptides have an aglycosylated Fc domain that contains one or more substitutions compared to a native Fc domain. Additionally, some embodiments involve an Fc domain that is binds some Fc receptors but not others. For example, polypeptides are provided with an aglycosylated Fc domain that selectively binds Fc?RIIa, but that is significantly reduced for binding to the highly homologous Fc?RIIb receptors. Furthermore, methods and compositions are provided for promoting antibody-dependent cell-mediated toxicity (ADCC) using a polypeptide having a modified aglycosylated Fc domain and a second non-Fc binding domain, which can be an antigen binding region of an antibody or a non-antigen binding region. Some embodiments concern antibodies with such polypeptides, which may have the same or different non-Fc binding domain.

Abstract: The present invention relates to methods of treatment, prevention, management or amelioration of one or more symptoms of diseases or disorders associated with CD20 expression that encompass administration of a combination of: (A) one or more antibodies that specifically bind Fc?RIIB, particularly human Fc?RIIB, with greater affinity than said antibodies bind Fc?RIIA, and (B) one or more antibodies that specifically bind to CD20. Such methods include methods of treating, preventing, managing or ameliorating one or more symptoms of a B cell related disease or disorder or an inflammatory disorder. The invention also provides pharmaceutical compositions comprising an anti-Fc?RIIB antibody and an anti-CD20 antibody.

Abstract: An objective of the present invention is to provide chimeric receptors containing a mouse Fc? receptor extracellular domain and a human Fc? receptor transmembrane domain, or chimeric receptors containing a mouse Fc? receptor extracellular domain and a human ? chain transmembrane domain. Another objective of the present invention is to provide methods for measuring the ADCC activity of mouse antibodies and methods of screening for mouse antibodies having ADCC activity, using the chimeric receptors. To accomplish the above-mentioned objectives, the present inventors produced chimeric molecules by fusing the extracellular domain of mouse Fc?R3 or mouse Fc?R4 with the transmembrane domain/intracellular domain of human ? chain or human Fc?R3, and expressed the chimeric molecules in human NK92 cells.

Abstract: The present invention relates to optimized Fc variants, methods for their generation, and antibodies and Fc fusions comprising optimized Fc variants.

Abstract: Bispecific antibodies are provided that specifically bind B-cell Activating Factor of the TNF Family (BAFF) and Interleukin-17A (IL-17) and are characterized as having high affinity and strong neutralizing properties to both BAFF and IL-17. The bispecific antibodies of the invention are expected to be useful in treating Lupus Nephritis (LN), Systemic Lupus Erythematosus (SLE), Rheumatoid Arthritis (RA), Psoriasis (Ps), Ankylosing Spondylitis (AS), Psoriatic Arthritis (PA), primary Sjögren's Syndrome (pSS), or Multiple Myeloma (MM).

Abstract: The present invention relates to methods of treating or preventing cancer and other diseases using molecules, particularly polypeptides, more particularly immunoglobulins (e.g., antibodies), comprising a variant Fc region, wherein said variant Fc region comprises at least one amino acid modification relative to a wild-type Fc region, which variant Fc region binds an Fc?R that activates a cellular effector (“Fc?RActivating,” such as Fc?RIIA or Fc?RIIIA) and an Fc?R that inhibits a cellular effector (“Fc?RInhibiting,” such as Fc?RIIA) with an altered Ratio of Affinities relative to the respective binding affinities of such Fc?R for the Fc region of the wild-type immunoglobulin. The methods of the invention are particularly useful in preventing, treating, or ameliorating one or more symptoms associated with a disease, disorder, or infection where either an enhanced efficacy of effector cell function mediated by Fc?R is desired (e.g.

Abstract: Disclosed are humanized RFB4 antibodies or antigen-binding fragments thereof. therapy of B-cell associated diseases, such as B-cell malignancies, autoimmune disease and immune dysfunction disease. Preferably, hRFB4 comprises the light and heavy chain RFB4 CDR sequences with human antibody FR and constant region sequences, along with heavy chain framework region (FR) amino acid residues Q1, F27, V48, A49, F68, R98, T117 and light chain residues L4, S22, K39, G100, V104, and K107. More preferably, the heavy and light chain variable region sequences of hRFB4 comprise SEQ ID NO:7 and SEQ ID NO:8, respectively. In certain embodiments, trogocytosis (antigen shaving) induced by hRFB4 plays a significant role in determining antibody efficacy and disease responsiveness for treatment of B-cell diseases, such as hematopoietic cancers, immune system dysfunction and/or autoimmune disease.

Abstract: Disclosed are processes for producing a variant polypeptide (e.g. antibodies) having modified binding characteristics for human Fc gamma receptor IIA (CD32A) leading to increased inhibition of proinflammatory mediators while retaining binding to a target antigen via its Fv portion, which processes comprise altering the polypeptides by substitution of at least two amino acid residues at EU position 325, 326 or 328 of a human IgG CH2 region for a sequence selected from SAAF, SKAF, NAAF and NKAF. Also disclosed are molecules, particularly polypeptides, more particularly immunoglobulins (e.g. antibodies) that include a variant CDR3 region, wherein the variant CDR3 region includes at least one amino acid modified relative to a wild-type CDR3 region. The polypeptides that can be generated according to the methods of the invention are highly variable, and they can include antibodies and fusion proteins that contain an Fc region or a biologically active portion thereof.

Abstract: The current invention involves biologically active proteins termed stradobodies. The stradobodies have two or more domains that create stradobody multimers. The stradobodies have both antigen-binding capacity and the ability to bind Fc receptors (FcR), and are useful in the treatment and prevention of disease.

Abstract: Disclosed are soluble hybrid Fc? receptor (Fc?R) polypeptide compositions and related methods of using such polypeptides to treat IgG-mediated and immune complex-mediated inflammation. Also disclosed are related compositions and methods for producing the soluble hybrid Fc?R polypeptides.

Abstract: The present invention relates to Fc variants having decreased affinity for Fc?RIIb, methods for their generation, Fc polypeptides comprising optimized Fc variants, and methods for using optimized Fc variants.

Abstract: The present invention provides reagents, methods and systems for predicting the inhibitory activity of an antibody or variant thereof comprising: determining a binding affinity of the antibody or variant thereof to a Fc activating receptor; determining a binding affinity of the antibody or variant thereof to a Fc inhibitory receptor, and calculating the ratio of said activating binding affinity to said inhibitory binding affinity (A/I ratio), wherein the magnitude of said ratio is less than one (1).

Abstract: The present invention relates to Fc variants having decreased affinity for Fc?RIIb, methods for their generation, Fc polypeptides comprising optimized Fc variants, and methods for using optimized Fc variants.

Abstract: The invention relates generally to compositions and methods for altering the isoelectric point of an antibody, and in some cases, resulting in improved plasma pharmacokinetics, e.g. increased serum half-life in vivo.

Abstract: The present invention provides humanized, chimeric and human anti-CD19 antibodies, anti-CD19 antibody fusion proteins, and fragments thereof that bind to a human B cell marker. Such antibodies, fusion proteins and fragments thereof are useful for the treatment and diagnosis of various B-cell disorders, including B-cell malignancies and autoimmune diseases. In more particular embodiments, the humanized anti-CD19 antibodies may comprise one or more framework region amino acid substitutions designed to improve protein stability, antibody binding and/or expression levels. In a particularly preferred embodiment, the substitutions comprise a Ser9lPhe substitution in the hA19 VH sequence.