Abstract: The present invention relates to compositions and methods for the immunomodulation mediated by the interaction of PD-L2 and RGMb.

Abstract: The invention provides methods of modulating follicular regulatory T (TFR) cell-mediated immune responses, follicular helper T (TFH) cell-mediated immune responses or both, and the use of those methods in the treatment of diseases or conditions mediated by TFR or TFH cells. The invention also provides novel methods for identifying TFR and TFH cells in a population of cells. The invention also provides compositions comprising TFR cells that have enhanced suppressive activity as compared wild type TFR cells. The invention also provides compositions comprising T follicular regulatory (TFR) cells isolated from the peripheral blood of a subject wherein the composition is enriched for TFR cells. Methods of making and using the compositions of the invention to modulate an immune response are also provided.

Abstract: The present invention is based, in part, on the discovery of monoclonal antibodies that specifically bind to the cytoplasmic domain of PD-L1 antibodies useful for diagnostic, prognostic, and therapeutic applications, as well as immunoglobulins, polypeptides, and nucleic acids thereof.

Abstract: The present invention relates to compositions and methods for the immunomodulation mediated by the interaction of PD-L2 and RGMb.

Abstract: The present invention is based, in part, on the discovery of monoclonal antibodies that specifically bind to the cytoplasmic domain of PD-L1 antibodies useful for diagnostic, prognostic, and therapeutic applications, as well as immunoglobulins polypeptides, and nucleic acids thereof.

Abstract: The present invention relates to methods of reducing liver PD-1-expressing CD8+ T cells using PD-1 Fc fusion proteins that bind Fc receptors, as well as diagnostic, prognostic, therapeutic methods and compositions related thereto.

Abstract: The invention provides methods of modulating follicular regulatory T (TFR) cell-mediated immune responses and the use of those methods in the treatment of diseases or conditions such as viral, bacterial, pathogenic, or fungal infections or cancer. Such methods provide for boosting of antibody production through the use of IL-21 to overcome TFR cell suppression of antibody production.

Abstract: The present invention is based, in part, on the identification of methods of modulating PD-1 expression and/or activity in regulatory T cells (Tregs) to thereby regulate effector immune responses in effector T cells (Teffs).

Abstract: The invention provides methods of modulating follicular regulatory T (TFR) cell-mediated immune responses, follicular helper T (TFH) cell-mediated immune responses or both, and the use of those methods in the treatment of diseases or conditions mediated by TFR or TFH cells. The invention also provides novel methods for identifying TFR and TFH cells in a population of cells. The invention also provides compositions comprising TFR cells that have enhanced suppressive activity as compared wild type TFR cells. The invention also provides compositions comprising T follicular regulatory (TFR) cells isolated from the peripheral blood of a subject wherein the composition is enriched for TFR cells. Methods of making and using the compositions of the invention to modulate an immune response are also provided.

Abstract: The present invention is based, in part, on the identification of novel antibodies that have binding affinity for both PD-L1 and PD-L2 and methods of using same.

Abstract: The invention provides methods of modulating follicular regulatory T (TFR) cell-mediated immune responses, follicular helper T (TFH) cell-mediated immune responses or both, and the use of those methods in the treatment of diseases or conditions mediated by TFR or TFH cells. The invention also provides novel methods for identifying TFR and TFH cells in a population of cells. The invention also provides compositions comprising TFR cells that have enhanced suppressive activity as compared wild type TFR cells. The invention also provides compositions comprising T follicular regulatory (TFR) cells isolated from the peripheral blood of a subject wherein the composition is enriched for TFR cells. Methods of making and using the compositions of the invention to modulate an immune response are also provided.

Abstract: The present invention is based, in part, on the identification of novel antibodies that have binding affinity for both PD-L1 and PD-L2 and methods of using same. In one aspect, an isolated monoclonal antibody, or antigen-binding fragment thereof, which specifically binds both PD-L1 and PD-L2, is provided. In one embodiment, both PD-L1 and PD-L2 are human PD-L1 and human PD-L2.

Abstract: The present invention is based on the identification, of compositions and methods for the identification, assessment, prevention, and treatment of T-cell exhaustion using CD39 biomarkers and modulators.

Abstract: The invention provides methods and compositions for perturbing gene expression in hematopoietic cell lineages in vivo.

Abstract: The present invention is based, in part, on the discovery of monoclonal antibodies that specifically bind to the cytoplasmic domain of PD-L1 antibodies useful for diagnostic, prognostic, and therapeutic applications, as well as immunoglobulins polypeptides, and nucleic acids thereof.

Abstract: The invention provides methods of modulating follicular regulatory T (TFR) cell-mediated immune responses, follicular helper T (TFH) cell-mediated immune responses or both, and the use of those methods in the treatment of diseases or conditions mediated by TFR or TFH cells. The invention also provides novel methods for identifying TFR and TFH cells in a population of cells. The invention also provides compositions comprising TFR cells that have enhanced suppressive activity as compared wild type TFR cells. The invention also provides compositions comprising T follicular regulatory (TFR) cells isolated from the peripheral blood of a subject wherein the composition is enriched for TFR cells. Methods of making and using the compositions of the invention to modulate an immune response are also provided.

Abstract: The present invention relates to compositions and methods for the immunomodulation mediated by the interaction of PD-L2 and RGMb.

Abstract: The present invention is based, in part, on the identification of novel antibodies that have binding affinity for both PD-L1 and PD-L2 and methods of using same. In one aspect, an isolated monoclonal antibody, or antigen-binding fragment thereof, which specifically binds both PD-L1 and PD-L2, is provided. In one embodiment, both PD-L1 and PD-L2 are human PD-L1 and human PD-L2.

Abstract: Disclosed are an assay to identify modulators of the PD-1:PD-L pathway and PD-1:PD-L pathway modulators, e.g., compounds and pharmaceutical compositions thereof. Methods for treating diseases influenced by modulation of the PD-1:PD-L pathway such as, for example, autoimmune diseases, inflammatory disorders, allergies, transplant rejection, cancer, immune deficiency, and other immune system-related disorders, are also disclosed.

Abstract: Disclosed are methods for modulating an immune response including a method for inhibiting the interaction between a B7 polypeptide and a PD-1 ligand, the method comprising contacting an immune cell bearing a PD-1 ligand, or an immune cell bearing a B7 polypeptide, with an agent that inhibits the interaction between the PD-1 ligand and the B7 polypeptide. Such agents may be an anti-PD-1 ligand antibody or a small molecule. Also disclosed is a method for modulating an immune response comprising contacting an immune cell bearing the PD-1 ligand, or an immune cell bearing the PD-1 polypeptide, with an agent that inhibits interactions between the PD-1 ligand and the PD-1 polypeptide, without inhibiting interactions between the PD-1 ligand and a B7 polypeptide, to thereby modulate an immune response. The agent may be an anti-PD-1 ligand antibody or a small molecule.