Published in:
01-10-2009 | Original Article
Cancer/testis antigens can be immunological targets in clonogenic CD133+ melanoma cells
Authors:
Craig Gedye, Juliet Quirk, Judy Browning, Suzanne Svobodová, Thomas John, Pavel Sluka, P. Rod Dunbar, Denis Corbeil, Jonathan Cebon, Ian D. Davis
Published in:
Cancer Immunology, Immunotherapy
|
Issue 10/2009
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Abstract
“Cancer stem cells” that resist conventional treatments may be a cause of therapeutic failure in melanoma. We report a subpopulation of clonogenic melanoma cells that are characterized by high prominin-1/CD133 expression in melanoma and melanoma cell lines. These cells have enhanced clonogenicity and self-renewal in vitro, and serve as a limited in vitro model for melanoma stem cells. In some cases clonogenic CD133+ melanoma cells show increased expression of some cancer/testis (CT) antigens. The expression of NY-ESO-1 in an HLA-A2 expressing cell line allowed CD133+ clonogenic melanoma cells to be targeted for killing in vitro by NY-ESO-1-specific CD8+ T-lymphocytes. Our in vitro findings raise the hypothesis that if melanoma stem cells express CT antigens in vivo that immune targeting of these antigens may be a viable clinical strategy for the adjuvant treatment of melanoma.