The Journal of Immunology, Vol 145, Issue 10 3202-3208, Copyright © 1990 by American Association of Immunologists

ARTICLES

Human V gamma 9-V delta 2 T cell receptor-gamma delta lymphocytes show specificity to Daudi Burkitt's lymphoma cells

E Sturm, E Braakman, P Fisch, RJ Vreugdenhil, P Sondel and RL Bolhuis
Department of Immunology, Dr. Daniel Den Hoed Cancer Centre, Rotterdam, The Netherlands.

Peripheral blood TCR-gamma delta cells with different functional V gamma or V delta gene rearrangements represent two nonoverlapping subsets. The major subset uses the V gamma 9 and the V delta 2 gene segments and the minor subset the V delta 1 gene segments in its functional TCR rearrangement. Upon in vitro activation, these TCR-gamma delta lymphocytes display MHC-unrestricted lytic activity, against a wide variety of tumor cells of distinct histologic origin. Here we show that fresh TCR-gamma delta lymphocytes that express a V gamma 9-V delta 2 encoded TCR display a specific proliferative response to Daudi, Burkitt's lymphoma cells. Moreover, cloned V gamma 9-V delta 2 lymphocytes show the capacity to lyse Daudi cells, whereas none of the cloned V gamma 1 TCR-gamma delta lymphocytes shows such specificity. Nucleotide diversity at the V-D-J junction of the TCR-V delta 2 gene did not contribute to this Daudi cell specificity. Comparison of the MHC-unrestricted cytolytic capacities of the V gamma 9-V delta 2 and the V delta 1 clones using a panel of distinct types of tumor target cells showed that on average, the level of MHC unrestricted lysis of V gamma 9-V delta 2 clones against these tumor cells exceeded that of V delta 1 clones. However, in contrast to all these tumor cell lines, only the Daudi cells showed such an absolute distinction in susceptibility to lysis by V gamma 9-V delta 2 and V delta 1 clones. V gamma 9-V delta 2 clones that were generated with a stimulator cell other than Daudi did not lyse their stimulator cells but nevertheless showed specific cytolysis of Daudi cells. The specific proliferation to and cytolysis of Daudi cells of the entire V gamma 9-V delta 2 subpopulation of TCR-gamma delta lymphocytes is reminiscent of a superantigen response.

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