title: Cytolytically active murine T-lymphocyte/polyoma virus-transformed fibroblast hybrids.
abstract: It would be of great interest to obtain permanent T-cell lines retaining specific activity without either allogeneic or xenogeneic stimulation. Functionally active hybrids between cytolytic T cells and thymoma were previously reported, but they had to be selected in a TCGF-containing medium. This study contains new results and reports the preparation of a hybrid cell from a cytolytic T cell and a polyoma virus-infected fibroblast, in which the T-cell characteristics dominate over the polyoma-transformed characteristics. A differentiated T-cell function (i.e., cytolysis) persists and the differentiated line does not require TCGF. The loss of cytolytic activity during in vitro evolution may be due to a selection favouring transformed cells, as suggested by concomitant enhancement of the transformed phenotype and chromosome loss.
mesh_terms: D000818:Animals; D002455:Cell Division; D002460:Cell Line; D002472:Cell Transformation, Viral; D003602:Cytotoxicity, Immunologic; D005260:Female; D005347:Fibroblasts / Q000382:microbiology / Q000502:physiology*; D006183:H-2 Antigens / Q000032:analysis; D006822:Hybrid Cells / Q000166:cytology / Q000502:physiology*; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D011120:Polyomavirus; D013602:T-Lymphocytes, Cytotoxic / Q000502:physiology*
chemical_list: D006183:H-2 Antigens