The Journal of Experimental Medicine
Janeway's Immunobiology 7th Edition
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Journal of Experimental Medicine, Vol 168, 1163-1168, Copyright © 1988 by Rockefeller University Press


ARTICLES

Cytotoxic T cells clear virus but augment lung pathology in mice infected with respiratory syncytial virus

MJ Cannon, PJ Openshaw and BA Askonas
Division of Immunology, National Institute for Medical Research, London, United Kingdom.

We have examined the function of class I MHC-restricted cytotoxic T cells in experimental respiratory syncytial virus (RSV) infection of BALB/c mice by transfer of T cell line MJC-A2 and CTL clone E8a into RSV-infected mice. The T cell line cleared pulmonary RSV infection within 5 d in persistently infected gamma-irradiated mice, but caused acute respiratory disease. This was only seen in infected mice and was often lethal after transfer of greater than 3 x 10(6) CTL. Lower numbers of CTL produced less severe disease but still cleared lung RSV, albeit over a longer time course (up to 10 d). Clearance of lung RSV in immunocompetent mice by the T cell line and CTL clone was again accompanied by acute and sometimes lethal respiratory disease. Bronchoalveolar lavage showed severe lung hemorrhage and frequent neutrophil efflux in mice with CTL-augmented disease.
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