Abstract: [PROBLEMS] To provide a monoclonal antibody simultaneously detectable the expression of all three kinds of HLA-A, HLA-B and HLA-C heavy chain proteins composing human class I leukocyte antigens (HLA class I) in denatured human tissue samples fixed by formalin and the like. [MEANS FOR SOLVING THE PROBLEMS] It was discovered that injection of denatured recombinant HILA-A*2402 heavy chain proteins to mouse for immunization led to establish HLA class I-specific antibody binding all of denatured HLA-A, B and C. The present invention is a monoclonal antibody specifically binding HLA-A, HLA-B and HLA-C heavy chains composing denatured human class I antigens, wherein said monoclonal antibody is produced by hybridomas (FERM AP-20454) and bound specifically HLA-A, HLA-B and HLA-C heavy chains composing denatured human class I antigens. Furthermore, the present invention is a test reagent for examining denatured human class I leukocyte antigens containing the monoclonal antibody as a major component.

Abstract: The present invention provides a partial peptide consisting of 8-11 contiguous amino acids in the amino acid sequence of livin set forth in SEQ ID NO: 1, which binds to HLA-A24 antigen and is recognized by cytotoxic T cells (CTLs), a polynucleotide encoding the peptide, and cancer vaccine comprising the peptide or the polynucleotide.

Abstract: A tumor antigen gene is identified by screening a cDNA library derived from a gastric cancer cell line that can induce gastric cancer antigen specific cytotoxic T cell (CTL) by means of hybridization and PCR utilizing an amino acid sequence of peptide fragment of a known gastric cancer antigen protein, introducing a selected cDNA clone into a cell of gastric cancer cell line that cannot induce gastric cancer antigen specific CTL so that the clone should be expressed in the cell, and selecting a transgenic cell that has acquired the ability to induce CTL. According to the present invention, there are provided a protein capable of inducing immune response against human gastric cancer, DNA encoding the protein, as well as vaccine for treatment and prevention of human gastric cancer, and agent for treatment and prevention of human gastric cancer.

Abstract: A tumor antigen gene is identified by screening a cDNA library derived from a gastric cancer cell line that can induce gastric cancer antigen specific cytotoxic T cell (CTL) by means of hybridization and PCR utilizing an amino acid sequence of peptide fragment of a known gastric cancer antigen protein, introducing a selected cDNA clone into a cell of gastric cancer cell line that cannot induce gastric cancer antigen specific CTL so that the clone should be expressed in the cell, and selecting a transgenic cell that has acquired the ability to induce CTL. According to the present invention, there are provided a protein capable of inducing immune response against human gastric cancer, DNA encoding the protein, as well as vaccine for treatment and prevention of human gastric cancer, and agent for treatment and prevention of human gastric cancer.

Abstract: A tumor antigen gene is identified by screening a cDNA library derived from a gastric cancer cell line that can induce gastric cancer antigen specific cytotoxic T cell (CTL) by means of hybridization and PCR utilizing an amino acid sequence of peptide fragment of a known gastric cancer antigen protein, introducing a selected cDNA clone into a cell of gastric cancer cell line that cannot induce gastric cancer antigen specific CTL so that the clone should be expressed in the cell, and selecting a transgenic cell that has acquired the ability to induce CTL. According to the present invention, there are provided a protein capable of inducing immune response against human gastric cancer, DNA encoding the protein, as well as vaccine for treatment and prevention of human gastric cancer, and agent for treatment and prevention of human gastric cancer.