Provided herein are compositions comprising anti-HLA-Ib antibodies as IVIg mimetics and methods for using the same for the prevention, treatment, therapy and / or amelioration of
inflammation induced diseases and
allograft rejection. In certain embodiments, the anti-HLA-Ib antibodies (
monoclonal antibodies or mixed
monoclonal antibodies, recombinant or chimeric or humanized or human antibodies) strongly mimic IVIg in immunoreactivity to HLA class Ia (HLA-A, HLA-B and HLA-Cw) and Ib antigens (HLA-E, HLA-F and HLA-G). In certain embodiments, the anti-HLA-Ib antibodies (
monoclonal or mixed monoclonal antibodies; recombinant, chimeric, humanized or human antibodies) strongly mimic IVIg in immunomodulatory or immunosuppressive activities. While anti-HLA-Ib mAbs can be used to restore anti-tumor activities of CD8+ T cells and Natural killer cells by passive therapy in
cancer patients, methods are also provided herein to induce production of polyclonal anti-HLA-Ib antibodies in
cancer patients for restoring anti-tumor activities of CD8+ T cells and NK cells, by active
specific immunotherapy.