Antineoplastic Combined Chemotherapy Protocols/pharmacology; Apoptosis/drug effects; Breast Neoplasms/drug therapy; Imidazoles/pharmacology; Membrane Glycoproteins/pharmacology; Oleanolic Acid/analogs & derivatives; Oleanolic Acid/pharmacology; Tumor Necrosis Factor-alpha/pharmacology; Animals; Antibodies, Monoclonal/pharmacology; Apoptosis Regulatory Proteins; Breast Neoplasms/metabolism; Breast Neoplasms/pathology; Caspase 8; Caspases/metabolism; Down-Regulation/drug effects; Drug Synergism; Female; Humans; Imidazoles/administration & dosage; Membrane Glycoproteins/administration & dosage; Mice; Mice, Inbred BALB C; Mice, Nude; Oleanolic Acid/administration & dosage; Receptors, TNF-Related Apoptosis-Inducing Ligand; Receptors, Tumor Necrosis Factor/agonists; Receptors, Tumor Necrosis Factor/biosynthesis; Receptors, Tumor Necrosis Factor/immunology; Recombinant Proteins/administration & dosage; Recombinant Proteins/pharmacology; TNF-Related Apoptosis-Inducing Ligand; Tumor Necrosis Factor-alpha/administration & dosage; Up-Regulation/drug effects; Xenograft Model Antitumor Assays