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TCR gamma delta bearing lymphocyte clones with lymphokine-activated killer activity against autologous leukemic cells

A Bensussan, JF Lagabrielle and L Degos

Institut National de la Sante et de la Recherche Medicale Unite 93, Paris, France.

Activated T lymphocytes with the T-cell receptor (TCR) gamma delta (CD3+ and TCR delta 1+) exhibit strong cytotoxic activity against the standard natural killer (NK) and lymphokine-activated killer (LAK) sensitive target cells. In order to test the cytotoxic activity of gamma delta T lymphocytes against autologous leukemic cells, 84 clones of gamma delta T lymphocytes were obtained from the peripheral blood of three acute lymphoblastic leukemia (ALL) patients. Forty-four of these T-cell clones were active against an LAK-sensitive cell line and the other 40 were active against K562, an NK target cell line. In each of the three patients, cytotoxic clones against autologous leukemic cells were obtained. Among the 84 clones, ten were able to kill autologous tumor cells, including eight that lyse the LAK-sensitive target and two with NK activity. The clones were highly cytotoxic, stable, and easily expanded in large quantity.

Volume 73, Issue 8, pp. 2077-2080, 06/01/1989
Copyright © 1989 by The American Society of Hematology


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