Variable expression on lung cancer cell lines of HLA-A2-binding MAGE-3 peptide recognized by cytotoxic T lymphocytes

Int J Oncol. 1998 May;12(5):1103-9. doi: 10.3892/ijo.12.5.1103.


Cytotoxic T lymphocytes (CTL) specific for HLA-A2-binding MAGE-3 peptide (FLWGPRALV) were generated by repetitive stimulation of PBMC with the peptide in the presence of EBV-transformed B blasts and IL-2. Using these CTL, we investigated the expression of the HLA-A2-binding MAGE-3 peptide on lung cancer cell lines. Of 14 cell lines investigated, 1-87, PC-9, OU-LC-KI, 11-18 and LK87 were derived from HLA-A2 positive patients. But cytofluorometry analysis showed that 1-87, PC-9 and OU-LC-KI, but not 11-18 or LK87 expressed the HLA-A2 antigen. All five cell lines expressed MAGE-3 gene mRNA. Twelve of thirteen CTL lines from two HLA-A2 positive donors showed no cytotoxicity against any of the 14 lung cancer cell lines. CTL line TI-1 showed cytotoxicity against 1-87 but not against any of the other cell lines. Treatment of 1-87 with IFN-gamma greatly augmented the cytotoxicity of TI-1 and induced it in the other 12 CTL lines, confirming the expression of the peptide on 1-87. No cytotoxicity was induced by IFN-gamma treatment of PC-9 or OU-LC-KI. However, PC-9 and OU-LC-KI pulsed with the peptide were killed efficiently by all of the CTL lines, suggesting no expression of the peptide on those cells. A low level of cytotoxicity was induced on 11-18 but not LK87 by IFN-gamma treatment, although expression of the HLA-A2 antigen was not observed by cytofluorometry. These findings showed that expression of the HLA-A2-binding MAGE-3 peptide recognized by CTL was variable on lung cancer cell lines.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amino Acid Sequence
  • Antigens, Neoplasm / biosynthesis
  • Antigens, Neoplasm / chemistry
  • Antigens, Neoplasm / immunology
  • Cytotoxicity, Immunologic*
  • HLA-A2 Antigen / immunology*
  • HLA-A2 Antigen / metabolism
  • Humans
  • Lung Neoplasms / immunology*
  • Lymphocyte Activation
  • Neoplasm Proteins / biosynthesis
  • Neoplasm Proteins / chemistry
  • Neoplasm Proteins / immunology*
  • Peptide Fragments / chemistry
  • Peptide Fragments / immunology
  • T-Lymphocytes, Cytotoxic / immunology*
  • Tumor Cells, Cultured


  • Antigens, Neoplasm
  • HLA-A2 Antigen
  • MAGEA3 protein, human
  • Neoplasm Proteins
  • Peptide Fragments