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A Rad LV‐Induced γδ T Cell Lymphoma Displaying an Antitumoral Cytotoxicity

We described previously the induction by RadLV infection of a lymphoma (NS8) expressing a cytolytic activity against an MCA‐induced fibrosarcoma. We report here that the cytolytic activity of these immortalized CD3+, CD8+ T cells is non‐MHC‐restricted. We then determined the structure and expression of the TCR chains expressed by these cells. Only partial rearrangement of the β chain associated to an abnormally short transcript was detected in NS8 cells, whereas the γ chain is rearranged and normally transcribed. On the opposite, rearrangement and expression of these genes were found in the other RadLV‐induced lymphomas analysed. Moreover, γ TCR proteins were detected on the cell surface of NS8 cells only, whereas the αβ complex, presents on the other T cell lines, was not expressed by NS8 cells.