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Laboratoire d'Hemato-Immunologie, INSERM U333, Institut Gustave Roussy, 39 rue Camille Desmoulins, F-94805 Villejuif Cedex, France
We have derived from lymphocytes infiltrating a human regressive melanoma lesion a series of T-cell receptor
/ß-dependent, HLA-B14-restricted cytotoxic T-lymphocyte clones reactive against the autologous tumor. Analysis of the T-cell receptor gene expression revealed that all the clones represented a unique cell expressing a Vß13.1/Jß1.1 gene segment. T-cell receptor transcripts expressed in the cloned cells were compared to those present in the uncultured tumor tissue. This analysis demonstrated that the specific cytotoxic T-lymphocyte clones characterized in vitro was actually selected and amplified in vivo at the lesion site. These results provide strong evidence that effector T-cells have contributed to tumor regression.
1 Recipient of a fellowship from the Deutsche Forschungsgemeinschaft (Ma 1351/1-1). To whom requests for reprints should be addressed.
Received 5/ 3/93. Accepted 6/16/93.
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