Abstract: Provided herein are methods of expanding B cells, and in particularly B10 cells capable of producing IL-10, ex vivo. The methods include incubation of harvested B cells in the presence of IL-21. Compositions comprising the ex vivo expanded B cells and methods of using the expanded B cell-containing compositions to treat diseases or conditions are also provided. Methods of assessing B10 cell function in a subject are also provided.

Abstract: The invention relates to immunotherapeutic compositions and methods for the treatment of B cell diseases and disorders in human subjects, such as, but not limited to, B cell malignancies and autoimmune diseases and disorders, using therapeutic antibodies that bind to the human CD19 antigen and that preferably mediate human ADCC. The present invention relates to pharmaceutical compositions comprising human or humanized anti-CD19 antibodies of the IgG1 or IgG3 human isotype. The present invention relates to pharmaceutical compositions comprising human or humanized anti-CD19 antibodies of the IgG2 or IgG4 human isotype that preferably mediate human ADCC. The present invention also relates to pharmaceutical compositions comprising chimerized anti-CD19 antibodies of the IgG1, IgG2, IgG3, or IgG4 isotype that mediate human ADCC. In preferred embodiments, the present invention relates to pharmaceutical compositions comprising monoclonal human, humanized, or chimeric anti-CD19 antibodies.

Abstract: The present invention relates to a distinct B cell subset, B10 cells, that regulate T cell mediated inflammatory responses through the secretion of interleukin-10 (IL-10). The invention also relates to the use of B10 cells in the manipulation of immune and inflammatory responses, and in the treatment of disease. Therapeutic approaches involving adoptive transfer of B10 cells, or expansion of their endogenous levels for controlling autoimmune or inflammatory diseases and conditions are described. Ablation of B10 cells, or inhibition of their IL-10 production can be used to upregulate immunodeficient conditions, ameliorate infectious diseases and/or to treat tumors/cancer. Diagnostic applications are also encompassed.

Abstract: The invention relates to immunotherapeutic compositions and methods for the treatment of B cell diseases and disorders in human subjects, such as, but not limited to, B cell malignancies and autoimmune diseases and disorders, using therapeutic antibodies that bind to the human CD19 antigen and that preferably mediate human ADCC. The present invention relates to pharmaceutical compositions comprising human or humanized anti-CD19 antibodies of the IgG1 or IgG3 human isotype. The present invention relates to pharmaceutical compositions comprising human or humanized anti-CD19 antibodies of the IgG2 or IgG4 human isotype that preferably mediate human ADCC. The present invention also relates to pharmaceutical compositions comprising chimerized anti-CD19 antibodies of the IgG1, IgG2, IgG3, or IgG4 isotype that mediate human ADCC. In preferred embodiments, the present invention relates to pharmaceutical compositions comprising monoclonal human, humanized, or chimeric anti-CD19 antibodies.

Abstract: The invention relates to immunotherapeutic compositions and methods for the treatment of B cell diseases and disorders in human subjects, such as, but not limited to, B cell malignancies and autoimmune diseases and disorders, using therapeutic antibodies that bind to the human CD19 antigen and that preferably mediate human ADCC. The present invention relates to pharmaceutical compositions comprising human or humanized anti-CD19 antibodies of the IgG1 or IgG3 human isotype. The present invention relates to pharmaceutical compositions comprising human or humanized anti-CD19 antibodies of the IgG2 or IgG4 human isotype that preferably mediate human ADCC. The present invention also relates to pharmaceutical compositions comprising chimerized anti-CD19 antibodies of the IgG1, IgG2, IgG3, or IgG4 isotype that mediate human ADCC. In preferred embodiments, the present invention relates to pharmaceutical compositions comprising monoclonal human, humanized, or chimeric anti-CD19 antibodies.

Abstract: The invention concerns treatment methods using anti-CD22 monoclonal antibodies with unique physiologic properties. In particular, the invention concerns methods for the treatment of B-cell malignancies and autoimmune diseases by administering an effective amount of a blocking anti-CD22 monoclonal antibody specifically binding to the first two Ig-like domains, or to an epitope within the first two Ig-like domains of native human CD22 (hCD22).

Abstract: The present invention relates to a phenotypically distinct CD1dhigh CD5+ B cell subset that regulates T cell mediated inflammatory responses through the secretion of interleukin-10 (IL-IO). The invention also relates to the use of these IL-IO producing regulatory B cells in the manipulation of immune and inflammatory responses, and in the treatment of disease. Therapeutic approaches involving adoptive transfer of these regulatory B cells, or expansion of their endogenous levels for controlling autoimmune or inflammatory diseases and conditions are described. Ablation of this subset of regulatory B cells, or inhibition of their IL-IO production can be used to upregulate immunodeficient conditions, and/or to treat tumors/cancer. Diagnostic applications also are encompassed.

Abstract: The invention relates to immunotherapeutic compositions and methods for the treatment of B cell diseases and disorders in human subjects, such as, but not limited to, B cell malignancies and autoimmune diseases and disorders, using therapeutic antibodies that bind to the human CD19 antigen and that preferably mediate human ADCC. The present invention relates to pharmaceutical compositions comprising human or humanized anti-CD19 antibodies of the IgG1 or IgG3 human isotype. The present invention relates to pharmaceutical compositions comprising human or humanized anti-CD19 antibodies of the IgG2 or IgG4 human isotype that preferably mediate human ADCC. The present invention also relates to pharmaceutical compositions comprising chimerized anti-CD19 antibodies of the IgG1, IgG2, IgG3, or IgG4 isotype that mediate human ADCC. In preferred embodiments, the present invention relates to pharmaceutical compositions comprising monoclonal human, humanized, or chimeric anti-CD19 antibodies.

Abstract: The invention relates to immunotherapeutic compositions and methods for the treatment of autoimmune diseases and disorders in human subjects using therapeutic antibodies that bind to the human CD19 antigen and that preferably mediate human ADCC. The present invention relates to pharmaceutical compositions comprising human or humanized anti-CD19 antibodies of the IgG1 or IgG3 human isotype. The present invention relates to pharmaceutical compositions comprising human or humanized anti-CD19 antibodies of the IgG2 or IgG4 human isotype that preferably mediate human ADCC. The present invention also relates to pharmaceutical compositions comprising chimerized anti-CD19 antibodies of the IgG1, IgG2, IgG3, or IgG4 isotype that mediate human ADCC. In preferred embodiments, the present invention relates to pharmaceutical compositions comprising monoclonal human, humanized, or chimeric anti-CD19 antibodies.

Abstract: The invention relates to immunotherapeutic compositions and methods for the treatment of B cell diseases and disorders in human subjects, such as, but not limited to, B cell malignancies, using therapeutic antibodies that bind to the human CD19 antigen and that preferably mediate human ADCC. The present invention relates to pharmaceutical compositions comprising human or humanized anti-CD19 antibodies of the IgG1 or IgG3 human isotype. The present invention relates to pharmaceutical compositions comprising human or humanized anti-CD19 antibodies of the IgG2 or IgG4 human isotype that preferably mediate human ADCC. The present invention also relates to pharmaceutical compositions comprising chimerized anti-CD19 antibodies of the IgG1, IgG2, IgG3, or IgG4 isotype that mediate human ADCC. In preferred embodiments, the present invention relates to pharmaceutical compositions comprising monoclonal human, humanized, or chimeric anti-CD19 antibodies.

Abstract: The invention relates to immunotherapeutic compositions and methods for the treatment and prevention of GVHD, humoral rejection, and post-transplantation lymphoproliferative disorder in human subjects using therapeutic antibodies that bind to the human CD19 antigen and that preferably mediate human ADCC. The present invention relates to pharmaceutical compositions comprising human or humanized anti-CD19 antibodies of the IgG1 or IgG3 human isotype. The present invention relates to pharmaceutical compositions comprising human or humanized anti-CD19 antibodies of the IgG2 or IgG4 human isotype that preferably mediate human ADCC. The present invention also relates to pharmaceutical compositions comprising chimerized anti-CD19 antibodies of the IgG1, IgG2, IgG3, or IgG4 isotype that mediate human ADCC. In preferred embodiments, the present invention relates to pharmaceutical compositions comprising monoclonal human, humanized, or chimeric anti-CD19 antibodies.

Abstract: The present invention provides monoclonal antibodies and antigen-binding fragments thereof that specifically bind to CD20, as well as pharmaceutical compositions comprising the same. The invention further provides methods of using the monoclonal antibodies, antigen-binding fragments, and pharmaceutical compositions, for example, in methods of depleting B cells or in treating B cell disorders. Also provided are cells, nucleic acids and methods for producing the monoclonal antibodies.

Abstract: The invention concerns treatment methods using anti-CD22 monoclonal antibodies with unique physiologic properties. In particular, the invention concerns methods for the treatment of B-cell malignancies and autoimmune diseases by administering an effective amount of a blocking anti-CD22 monoclonal antibody specifically binding to the first two Ig-like domains, or to an epitope within the first two Ig-like domains of native human CD22 (hCD22).

Abstract: The subject invention relates a method for the production of monoclonal antibodies. The method utilizes an immunized animal having antibody-producing cells with disrupted peripheral tolerance. The invention also provides a method for the use of such monoclonal antibodies, and polyclonal antibodies derived from an immunized animal having antibody-producing cells with disrupted peripheral tolerance, for in vitro and in vivo clinical diagnostics and therapeutics.

Abstract: Isolated nucleic acids encoding MS4A polypeptides; isolated MS4A polypeptides, and uses thereof. The disclosed MS4A nuclcic acids and polypeptides can be used to generate a mouse model of atopic disorders, for drug discovery screens, and for therapeutic treatment of atopic disorders or other MS4A-related conditions.

Abstract: The invention concerns treatment methods using anti-CD22 monoclonal antibodies with unique physiologic properties. In particular, the invention concerns methods for the treatment of B-cell malignancies by administering an effective amount of a blocking anti-CD22 monoclonal antibody specifically binding to the first two Ig-like domains, or to an epitope within the first two Ig-like domains of native human CD22 (hCD22).

Abstract: The invention concerns treatment methods using anti-CD22 monoclonal antibodies with unique physiologic properties. In particular, the invention concerns methods for the treatment of B-cell malignancies and autoimmune diseases by administering an effective amount of a blocking anti-CD22 monoclonal antibody specifically binding to the first two Ig-like domains, or to an epitope within the first two Ig-like domains of native human CD22 (hCD22).

Abstract: Human lymphocyte-associated cell surface protein LAM-1, which includes domains homologous with binding domains of animal lectins, growth factors, and C3/C4 binding proteins, and the cDNA encoding LAM-1, are described. Antagonists to LAM-1 are used in a method of treating a human patient suffering from a lymphocyte-mobilizing condition which involves administering a therapeutic amount of the antagonist in a non-toxic pharmaceutical carrier substance. Additionally, antibodies that bind human LAM-1 and inhibit cellular adhesion, migration or infiltration into tissues are described.

Abstract: A shed form of leukocyte adhesion molecule-1 (LAM-1, L-selectin) is present in high levels in human plasma. Quantitative methods of detecting shed LAM-1 (sLAM-1) by Western blot and ELISA analysis are disclosed. Also disclosed are methods for the specific detection of cell-surface bound LAM-1 in the presence of shed LAM-1 and for immunotherapy using monoclonal antibodies reactive with cell-surface bound LAM-1 but not reactive with shed LAM-1. In addition a method of producing an antibody that is reactive with cell-surface bound LAM-1 but not reactive with shed LAM-1 is disclosed.

Abstract: A human cDNA sequence encoding lymphocyte-associated cell surface protein LAM-1, which contains domains homologous with binding domains of animal lectins, growth factors, and C3/C4 binding proteins, and the LAM-1 protein encoded by the cDNA sequence, are described. Antagonists to LAM-1 are used in a method of treating a human patient suffering from a lymphocyte-mobilizing condition which involves administering a therapeutic amount of the antagonist in a non-tox pharmaceutical carrier substance.