Abstract
Cytotoxic T lymphocytes (CTL) play an important role in the control of intracellular pathogens through their capacity to lyse infected target cells or secrete immunostimulatory cytokines, such as IFN-γ or TNF-α (1–3). These features of cytotoxic T cells are termed “effector” mechanisms and have been measured extensively in the past using assays, such as cytokine ELISAs, or radioactive chromium release from target cells (4,5). However, several other important changes occur within CTL in conjunction with these effector mechanisms. Triggering of the T-cell receptor (TCR) by cognate peptide/major histocompatability complex (MHC) class I complexes leads to a cascade of intracellular signaling events which, among other outcomes, results in increased cell surface adhesion to extracellular matrix and surrounding cells (6,7). Increased surface adhesion may be caused by the provision of new cell surface adhesion receptors from the intracellular pool or conformational changes in existing cell surface receptors following antigen-specific TCR triggering (8). Several studies have now demonstrated the specific binding of activated CTL to plate-bound MHC class I molecules and fibronectin using an assay system that involves wash steps to remove unbound cells (9–11). In the current chapter, the increased adhesiveness of CTL, following specific peptide/MHC class I recognition, forms the basis of a simple, peptide-specific assay, the cytotoxic T-cell adherence assay (CAA) (12), which correlates well with more traditional effector assays, such as 51Cr release, and does not involve washing steps.
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References
Berke, G. (1993) The functions and mechanisms of action of cytolytic lymphocytes, in Fundamental Immunology (Paul, W. E., ed.), vol. 3, Raven, New York, pp. 965–1014.
Kägi, D., Vignaux, F., Ledermann, B., Bürki, K., Depraetere, V., Nagata, S., Hengartner, H., and Golstein, P. (1994) Fas and perforin pathways as major mechanisms of T cell-mediated cytotoxicity. Science 265, 528–530.
Takeshita, T., Kozlowski, S., England, R. D., Brower, R., Schneck, J., Takahashi, H., DeLisi, C., Margulies, D. H., and Berzofsky, J. A. (1993) Role of conserved regions of class I MHC molecules in the activation of CD8+ CTL by peptide and purified cell-free class I molecules. Int. Immunol. 5, 1129–1138.
Li, Y., Stefura, W. P., Simons, F. E., Jay, F. T., and HayGlass, K. T. (1994) Limiting dilution analysis of antigen stimulated IL-4 and IFN-gamma production in human mononuclear cell populations. J. Immunol. Methods 175, 169–179.
Brunner, K. T., Mauel, J., Cerrotini, M. C., and Chapius, B. (1968) Quantitative assay of the lytic action of immune lymphoid cells on 51 Cr-labeled allogeneic target cells in vitro: inhibition by isoantibody and by drugs. Immunology 14, 180–181.
Dustin, M. L. and Springer, T. A. (1991) Role of lymphocyte adhesion receptors in transient interactions and cell locomotion. Ann. Rev. Immunol. 9, 27–66.
O’Rourke, A. M. and Mescher, M. F. (1992) Cytotoxic T-lymphocyte activation involves a cascade of signaling and adhesion events. Nature 358, 253–255.
Lub, M., Van Kooyk, Y., and Figdor, C. G. (1995) Ins and outs of LFA-1. Immunol. Today 16, 479–483.
O’Rourke, A. M. and Mescher, M. F. (1993) The roles of CD8 in cytotoxic T lymphocyte function. Immunol. Today 14, 183–188.
O’Rourke, A. M., Rogers, J., and Mescher, M. F. (1990) Activated CD8 binding to class I protein mediated by the T-cell receptor results in signalling. Nature 346, 187–189.
Kane, K. P. and Mescher, M. F. (1993) Activation of CD8-dependent cytotoxic T lymphocyte adhesion and degranulation by peptide class I antigen complexes. J. Immunol. 150, 4788–4797.
Leggatt, G. R., Alexander-Miller, M. A., Kumar, A., Hoffman, S. L., and Berzofsky, J. A. (1997) Cytotoxic T lymphocyte (CTL) adherence assay (CAA): a non-radioactive assay for murine CTL recognition of peptide-MHC class I complexes. J. Immunol. Methods 201, 1–10.
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© 2000 Humana Press Inc., Totowa, NJ
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Leggatt, G.R., Berzofsky, J.A. (2000). Cytotoxic T-Cell Adherence Assay (CAA). In: Kearse, K.P. (eds) T Cell Protocols. Methods in Molecular Biology™, vol 134. Humana Press. https://doi.org/10.1385/1-59259-682-7:277
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DOI: https://doi.org/10.1385/1-59259-682-7:277
Publisher Name: Humana Press
Print ISBN: 978-0-89603-810-3
Online ISBN: 978-1-59259-682-9
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