Abstract: Monoclonal antibodies are identified that bind the IL-21 protein. These antibodies are used to identify regions of the IL-21 protein to where binding neutralizes IL-21 activity. Hybridomas and methods of producing anti-IL-21 monoclonal antibodies are described. The monoclonal antibodies are useful in treating IL-21-mediated diseases, which may include autoimmune and inflammatory diseases such as pancreatitis, type I diabetes (IDDM), Graves Disease, inflammatory bowel disease (IBD), Crohn's Disease, ulcerative colitis, irritable bowel syndrome, multiple sclerosis, rheumatoid arthritis, diverticulosis, systemic lupus erythematosus, psoriasis, ankylosing spondylitis, scleroderma, systemic sclerosis, psoriatic arthritis, osteoarthritis, atopic dermatitis, vitiligo, graft vs.

Abstract: Human anti-human IL-21 monoclonal antibodies and the hybridomas that produce them are presented. Certain of these antibodies have the ability to bind native human IL-21, a mutant recombinant IL-21 protein and/or peptide regions of human IL-21. These human anti-IL-21 antibodies are useful in therapeutic treatment of autoimmune and inflammatory diseases, particularly diseases mediated by T follicular helper cells, B cells TH cells or TH17 cells.

Abstract: Antibodies that bind to polypeptides and peptides comprising the sequence of zalpha11 Ligand as shown in SEQ ID NO: 2 are described. The antibodies may bind the full length sequence of 162 amino acid residues or a fragment thereof, including a mature polypeptide of 131 amino acid residues and smaller polypeptide and peptide sequences. The antibodies may include antibodies that are polyclonal, monoclonal, murine, humanized or neutralizing. Methods for producing the antibodies are also described.

Abstract: The expression vectors and methods using an E. coli expression system for the large scale production of IL-21 are described. The vectors utilize the IL-21 coding sequence with specific changes in nucleotides in order to optimize codons and mRNA secondary structure for translation in E. coli. Using the expression vectors, the IL-21 gene was produced in E. coli to a level of greater than 1 g/L in fed batch fermentation. Also included are OmpT deficient E. coli strains transformed with an IL-21 expression vector.

Abstract: The expression vectors and methods using an E. coli expression system for the large scale production of IL-21 are described. The vectors utilize the IL-21 coding sequence with specific changes in nucleotides in order to optimize codons and mRNA secondary structure for translation in E. coli. Using the expression vectors, the IL-21 gene was produced in E. coli to a level of greater than 1 g/L in fed batch fermentation. Also included are OmpT deficient E. coli strains transformed with an IL-21 expression vector.

Abstract: Novel polypeptides, polynucleotides encoding the polypeptides, and related compositions and methods are disclosed for zalpha11, a novel cytokine receptor. The polypeptides may be used within methods for detecting ligands that stimulate the proliferation and/or development of hematopoietic, lymphoid and myeloid cells in vitro and in vivo. Ligand-binding receptor polypeptides can also be used to block ligand activity in vitro and in vivo. The polynucleotides encoding zalpha11, are located on chromosome 16, and can be used to identify a region of the genome associated with human disease states. The present invention also includes methods for producing the protein, uses therefor and antibodies thereto.

Abstract: Antibodies that bind to polypeptides and peptides comprising the sequence of zalpha11 Ligand as shown in SEQ ID NO: 2 are described. The antibodies may bind the full length sequence of 162 amino acid residues or a fragment thereof, including a mature polypeptide of 131 amino acid residues and smaller polypeptide and peptide sequences. The antibodies may include antibodies that are polyclonal, monoclonal, murine, humanized or neutralizing. Methods for producing the antibodies are also described.

Abstract: The expression vectors and methods using an E. coli expression system for the large scale production of IL-21 are described. The vectors utilize the IL-21 coding sequence with specific changes in nucleotides in order to optimize codons and mRNA secondary structure for translation in E. coli. Using the expression vectors, the IL-21 gene was produced in E. coli to a level of greater than 1 g/L in fed batch fermentation. Also included are OmpT deficient E. coli strains transformed with an IL-21 expression vector.

Abstract: Antibodies that bind to polypeptides and peptides comprising the sequence of zalpha11 Ligand as shown in SEQ ID NO: 2 are described. The antibodies may bind the full length sequence of 162 amino acid residues or a fragment thereof, including a mature polypeptide of 131 amino acid residues and smaller polypeptide and peptide sequences. The antibodies may include antibodies that are polyclonal, monoclonal, murine, humanized or neutralizing. Methods for producing the antibodies are also described.

Abstract: Antibodies that bind to polypeptides and peptides comprising the sequence of zalpha11 Ligand as shown in SEQ ID NO: 2 are described. The antibodies may bind the full length sequence of 162 amino acid residues or a fragment thereof, including a mature polypeptide of 131 amino acid residues and smaller polypeptide and peptide sequences. The antibodies may include antibodies that are polyclonal, monoclonal, murine, humanized or neutralizing. Methods for producing the antibodies are also described.

Abstract: Monoclonal antibodies to the IL-21 receptor and multimeric complexes comprising the IL-21 receptor; including monoclonal antibodies to the heterodimeric receptor, IL-21/IL-2R?; have been prepared. The invention also describes a method of producing said antibodies. And, the invention also describes a method of treatment comprising using said antibodies to suppress an immune response.

Abstract: Antibodies that bind to polypeptides and peptides comprising the sequence of zalpha11 Ligand as shown in SEQ ID NO: 2 are described. The antibodies may bind the full length sequence of 162 amino acid residues or a fragment thereof, including a mature polypeptide of 131 amino acid residues and smaller polypeptide and peptide sequences. The antibodies may include antibodies that are polyclonal, monoclonal, murine, humanized or neutralizing. Methods for producing the antibodies are also described.

Abstract: Antibodies that bind to polypeptides and peptides comprising the sequence of zalpha11 Ligand as shown in SEQ ID NO: 2 are described. The antibodies may bind the full length sequence of 162 amino acid residues or a fragment thereof, including a mature polypeptide of 131 amino acid residues and smaller polypeptide and peptide sequences. The antibodies may include antibodies that are polyclonal, monoclonal, murine, humanized or neutralizing. Methods for producing the antibodies are also described.

Abstract: Antibodies that bind to polypeptides and peptides comprising the sequence of zalpha11 Ligand as shown in SEQ ID NO: 2 are described. The antibodies may bind the full length sequence of 162 amino acid residues or a fragment thereof, including a mature polypeptide of 131 amino acid residues and smaller polypeptide and peptide sequences. The antibodies may include antibodies that are polyclonal, monoclonal, murine, humanized or neutralizing. Methods for producing the antibodies are also described.

Abstract: The present invention relates to zalpha11 Ligand polynucleotide and polypeptide molecules. The zalpha11 Ligand is a novel cytokine. The polypeptides may be used within methods for stimulating the proliferation and/or development of hematopoietic cells in vitro and in vivo. The present invention also includes methods for producing the protein, uses therefor and antibodies thereto.

Abstract: The present invention relates to zalpha11 Ligand polynucleotide and polypeptide molecules. The zalpha11 Ligand is a novel cytokine. The polypeptides may be used within methods for stimulating the proliferation and/or development of hematopoietic cells in vitro and in vivo. The present invention also includes methods for producing the protein, uses therefor and antibodies thereto.

Abstract: Heterodimeric proteins comprising two helical bundle cytokines are disclosed. One of the polypeptides comprises zsig81 and a second polypeptide which comprises either p19 (aka IL-12A) or p35 (aka IL-12A). The proteins may be produced as fusion proteins or expressed as a single chain. The heterdimeric protein comprising zsig81 and p19 is designated zcyto33f2 and the heterodimeric protein comprising zsig81 and p35 is designated zcyto35f2. Zcyto33f2 and zcyto35f2 proteins are associated with epithelial cell types, including lung and gut epithelium, and may play a role in physiological conditions such as inflammation.

Abstract: Novel polypeptides, polynucleotides encoding the polypeptides, and related compositions and methods are disclosed for zalpha11, a novel cytokine receptor. The polypeptides may be used within methods for detecting ligands that stimulate the proliferation and/or development of hematopoietic, lymphoid and myeloid cells in vitro and in vivo. Ligand-binding receptor polypeptides can also be used to block ligand activity in vitro and in vivo. The polynucleotides encoding zalpha11, are located on chromosome 16, and can be used to identify a region of the genome associated with human disease states. The present invention also includes methods for producing the protein, uses therefore and antibodies thereto.

Abstract: Novel polypeptides, polynucleotides encoding the polypeptides, and related compositions and methods are disclosed for zalpha11, a novel cytokine receptor. The polypeptides may be used within methods for detecting ligands that stimulate the proliferation and/or development of hematopoietic, lymphoid and myeloid cells in vitro and in vivo. Ligand-binding receptor polypeptides can also be used to block ligand activity in vitro and in vivo. The polynucleotides encoding zalpha11, are located on chromosome 16, and can be used to identify a region of the genome associated with human disease states. The present invention also includes methods for producing the protein, uses therefor and antibodies thereto.

Abstract: The present invention relates to zalpha11 Ligand polynucleotide and polypeptide molecules. The zalpha11 Ligand is a novel cytokine. The polypeptides may be used within methods for stimulating the proliferation and/or development of hematopoietic cells in vitro and in vivo. The present invention also includes methods for producing the protein, uses therefor and antibodies thereto.