Abstract: Compositions and methods are provided for inducing anti-tumor immunity. More specifically, tumor cells and recombinant constructs are provided that express a cell surface CD83 polypeptide and/or a cell surface expressed antibody that specifically binds to an immune cell receptor, particularly an antibody that specifically binds to CD137. The invention also provides recombinant expression constructs comprising polynucleotides that encode a cell surface CD83 polypeptide, a cell surface expressed anti-immune cell receptor antibody, and/or at least one tumor antigen, and the related expressed products.

Abstract: The present invention relates to novel antibodies, antibody fragments and antibody conjugates and single-chain immunotoxins reactive with human carcinoma cells. More particularly, the antibodies, conjugates and single-chain immunotoxins of the invention include: a murine monoclonal antibody, BR96; a human/murine chimeric antibody, ChiBR96; a F(ab?)2 fragment of BR96; ChiBR96-PE, ChiBR96-LysPE40, ChiBR96 F(ab?)2-LysPE40 and ChiBR96 Fab?-LysPE40 conjugates and recombinant BR96 sFv-PE40 immunotoxin. These molecules are reactive with a cell membrane antigen on the surface of human carcinomas. The BR96 antibody and its functional equivalents, displays a high degree of selectivity for carcinoma cells and possess the ability to mediate antibody-dependent cellular cytotoxicity and complement-dependent cytotoxicity activity.