An intracisternal A-particle sequence codes for an antigen recognized by syngeneic cytolytic T lymphocytes on a mouse spontaneous leukemia

Eur J Immunol. 1994 Sep;24(9):2203-12. doi: 10.1002/eji.1830240941.


Cytolytic T lymphocyte (CTL) clones directed against spontaneous mouse leukemia LEC have been obtained. By transfecting a cosmid library into cells which were then tested for their ability to stimulate the CTL, we identified the gene coding for the antigen recognized by one of these CTL clones. It is the gag gene of an endogenous defective retrovirus that belongs to the intracisternal A particle (IAP) family. A gag-encoded nonapeptide presented by the H-2 Dk molecule caused recognition by the anti-LEC CTL clone. Southern blot and polymerase chain reaction analyses indicated that the expression of the antigen by the LEC tumor cell line resulted from the transposition of an IAP sequence into a new genomic location.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amino Acid Sequence
  • Animals
  • Antigens, Neoplasm / genetics*
  • Antigens, Neoplasm / immunology
  • Base Sequence
  • Cytotoxicity Tests, Immunologic
  • Gene Products, gag / genetics*
  • Gene Products, gag / immunology
  • Genes, Intracisternal A-Particle*
  • Leukemia, Experimental / immunology*
  • Mice
  • Mice, Inbred CBA
  • Molecular Sequence Data
  • Polymerase Chain Reaction
  • T-Lymphocytes, Cytotoxic / immunology*
  • Transfection
  • Tumor Cells, Cultured
  • Tumor Necrosis Factor-alpha / biosynthesis


  • Antigens, Neoplasm
  • Gene Products, gag
  • Tumor Necrosis Factor-alpha
  • antigen LEC-A

Associated data

  • GENBANK/S74315