Double-negative (CD4- CD8-) T cells with an alpha/beta T cell receptor. Non-MHC-restricted cytolytic activity and lymphokine production |
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Authors: | E G Brooks D P Wirt R M Goldblum S Vaidya M T Asuncion J C Patterson C F Ware G R Klimpel |
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Affiliation: | Department of Pediatrics, University of Texas Medical Branch, Galveston 77550. |
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Abstract: | T cell lines with a novel phenotype (CD3+ TCR-alpha/beta+ CD4- CD8-) were developed from the peripheral blood of a patient with a combined immunodeficiency and tissue injury resembling graft-vs-host disease. One of these IL-2-dependent T cell lines demonstrated non-MHC-restricted cytolytic function against tumor targets, syngeneic and allogeneic fibroblasts, and PHA blasts from allogeneic donors. The other cell line only became cytotoxic in the presence of lectin or anti-CD3 antibody. The two cell lines also differed in their expression of the T-200 gene products CD45RO (gp180) and CD45RA (gp220). Both cell lines produced tumor necrosis factor-alpha and -beta and IFN-gamma activity when activated with mitogens or PMA and IL-1. The in vitro functions of these T-cell lines suggest a potential role for alpha/beta double-negative T lymphocytes in tissue injury resembling graft-vs-host disease. |
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