The Journal of Experimental Medicine
PBL InterferonSource
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Journal of Experimental Medicine, Vol 161, 257-262, Copyright © 1985 by Rockefeller University Press

ARTICLES

Interferon enhances the susceptibility of virus-infected fibroblasts to cytotoxic T cells

JF Bukowski and RM Welsh

Interferon (IFN) pretreatment of low-passage mouse embryonic fibroblasts (MEF) infected with lymphocytic choriomeningitis virus or vaccinia virus rendered these cells two to three times more susceptible to lysis by H-2 restricted, virus-specific cytotoxic T lymphocytes (CTL) than control, virus-infected MEF. The increased sensitivity to lysis correlated with increased expression of surface H-2 antigens, but not viral antigens. Continuous cell lines already highly sensitive to CTL-mediated lysis and already expressing high levels of surface H-2 antigens were unaffected by IFN pretreatment. These results suggest that IFN treatment, by increasing surface H-2 levels, may result in increased association of surface H-2 and virus antigens, leading to enhanced recognition and lysis by virus-specific CTL.
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