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Immunogenic variants obtained by mutagenesis of mouse Lewis lung carcinoma. Recognition of variant-specific antigens by cytolytic T lymphocytes



Immunogenic variants obtained by mutagenesis of mouse Lewis lung carcinoma. Recognition of variant-specific antigens by cytolytic T lymphocytes



European Journal of Cancer and Clinical Oncology 18(9): 867-874



By mutagenesis of a cell line derived from Lewis lung carcinoma (3LL), it is possible to obtain at high frequency stable tumor cell variants (tum-) that are rejected by syngeneic mice. The possibility of obtaining a cytolytic T cell (CTL) response directed specifically against these tum- variants was examined. With the four variants that were analysed, a significant cytolytic activity was obtained with peritoneal cells from immune mice collected shortly after an intraperitoneal boost and also with spleen cells after a secondary stimulation in vitro. The CTL populations preferentially lysed the immunizing tum- variant, while also showing a cross-reactive lysis against the other variants and the original 3LL cells. Highly active CTL clones could be isolated from limiting dilution microcultures of these CTL populations. The clonal analysis clearly showed the existence of two distinct CTL populations, one directed exclusively against the immunizing variant and another that lysed all 3LL targets equally. This CTL specificity analysis therefore demonstrates directly the presence of new antigens on the 3LL tum- cell variants.

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Accession: 043333051

Download citation: RISBibTeXText

PMID: 6185345

DOI: 10.1016/0277-5379(82)90197-3


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