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Research Article Free access | 10.1172/JCI112725

Abnormal cytolytic activity of lymphocyte function-associated antigen-1-deficient human cytolytic T lymphocyte clones.

S J Mentzer, B E Bierer, D C Anderson, T A Springer, and S J Burakoff

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Published November 1, 1986 - More info

Published in Volume 78, Issue 5 on November 1, 1986
J Clin Invest. 1986;78(5):1387–1391. https://doi.org/10.1172/JCI112725.
© 1986 The American Society for Clinical Investigation
Published November 1, 1986 - Version history
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Abstract

The involvement of the lymphocyte function-associated antigen-1 (LFA-1) membrane molecule in cytolytic T lymphocyte (CTL) interactions with lymphoid target cells was investigated using CTL clones derived from two patients with a heritable deficiency of LFA-1. LFA-1 surface expression on the CTL clones was 1% of the normal level of LFA-1, unchanged with prolonged culture, and identical on 14 different CTL clones. The function of the LFA-1 molecule was addressed using the LFA-1-deficient CTL clones and LFA-1-deficient lymphoid target cells. The lytic activity of the LFA-1-deficient CTL clones was 43% of control when tested against a target cell line expressing normal levels of LFA-1 and less than 10% of control when tested against an LFA-1-deficient target cell line. These results demonstrate a direct involvement of LFA-1 in CTL-mediated cytolysis and suggest a more general dependence on LFA-1 in lymphoid cell-cell interactions.

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