Cytolytic T-cell responses of cancer patients vaccinated with a MAGE antigen

Pierre G Coulie1, Vaios Karanikas, Christophe Lurquin

  • 1Cellular Genetics Unit, Institute of Cellular Pathology, Université de Louvain, Brussels, Belgium.

Immunological Reviews
|November 26, 2002
PubMed

Insights

Therapeutic cancer vaccines targeting MAGE antigens showed a correlation between tumor regression and T-cell responses. A low-level T-cell response against the MAGE-3 peptide was observed in some patients who experienced tumor regression.

Area of Science:

  • Immunology
  • Oncology
  • Vaccinology

Background:

  • Cancer-germline genes, like the MAGE family, are expressed in tumors and male germ cells but not normal tissues.
  • These genes encode tumor-specific antigens used in therapeutic vaccination trials for metastatic melanoma.
  • Evaluating the link between tumor regression and T-cell responses to vaccine antigens is crucial.

Observation:

  • This study evaluated the T-cell responses in patients vaccinated with a MAGE-3 antigenic peptide or a recombinant virus encoding the peptide.
  • Blood lymphocytes were stimulated and analyzed for T-cell responses using tetramer, T-cell cloning, and TCR analysis.

Findings:

  • A low-level, typically monoclonal, cytolytic T lymphocyte response against the MAGE-3 peptide was detected in 4 out of 9 patients with tumor regression.
  • Only 1 out of 14 patients with progressive disease exhibited a similar T-cell response.

Implications:

  • These findings suggest a correlation between tumoral regressions and T-cell responses against MAGE-3 peptide vaccination in metastatic melanoma.
  • This could inform future cancer vaccine development and patient selection strategies.

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