CD80 (B7.1) and CD54 (intracellular adhesion molecule-1) induce target cell susceptibility to promiscuous cytotoxic T cell lysis
Nishio, M.; Spielman, J.; Lee, R.K.; Nelson, D.L.; Podack, E.R.
Journal of Immunology 157(10): 4347-4353
1996
ISSN/ISBN: 0022-1767 PMID: 8906809 Document Number: 461442
Overexpression of B7 and intracellular adhesion molecule-1 (ICAM-1) on syngeneic cells triggered MHC-unrestricted lysis by MHC-restricted CD8+ CTL without TCR/CD3 engagement. Both CD28/B7 and LFA-1/ICAM-1 interactions were required for MHC-nonrestricted cytotoxicity. Cytotoxicity was measured in 4-h and 16- to 18-h cytotoxicity assays. B7-ICAM-1 overexpression triggered perforin- and Fas ligand-mediated lysis, while TNF-alpha was not elicited in MHC-unrestricted cytotoxicity. These results suggest that target cells may elicit MHC-unrestricted lysis from CTL through up-regulation of membrane adherence and costimulatory receptors.