The Journal of Experimental Medicine
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Published online 6 November 2000.
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© The Rockefeller University Press, 0022-1007/2000/11/1317/ $5.00
The Journal of Experimental Medicine, Volume 192, Number 9, November 6, 2000 1317-1326


Original Article

Influenza Virus Lung Infection Protects from Respiratory Syncytial Virus–induced Immunopathology

Gerhard Walzlb, Sabrina Tafurod, Paul Mossc, Peter J.M. Openshawb, and Tracy Hussella
a Department of Biochemistry, Centre for Molecular Microbiology and Infection, Imperial College of Science, Technology and Medicine, London SW7 2AZ, United Kingdom
b Department of Respiratory Medicine, National Heart and Lung Institute at St Mary's Hospital, Edgbaston, Birmingham B15 2TS, United Kingdom
c Cancer Research Campaign Institute for Cancer Studies, University of Birmingham, Edgbaston, Birmingham B15 2TS, United Kingdom
d Molecular Immunology Group, Institute of Molecular Medicine, John Radcliffe Hospital, Headington, Oxford OX3 9DS, United Kingdom

Correspondence to: Tracy Hussell, Department of Biochemistry, Wellcome Centre for Molecular Microbiology and Infection, Imperial College of Science, Technology and Medicine, London SW7 2AZ, UK. Tel:44-20-7-594-3853 Fax:44-20-7-262-8913

The effect of infection history is ignored in most animal models of infectious disease. The attachment protein of respiratory syncytial virus (RSV) induces T helper cell type 2–driven pulmonary eosinophilia in mice similar to that seen in the failed infant vaccinations in the 1960s. We show that previous influenza virus infection of mice: (a) protects against weight loss, illness, and lung eosinophilia; (b) attenuates recruitment of inflammatory cells; and (c) reduces cytokine secretion caused by RSV attachment protein without affecting RSV clearance. This protective effect can be transferred via influenza-immune splenocytes to naive mice and is long lived. Previous immunity to lung infection clearly plays an important and underestimated role in subsequent vaccination and infection. The data have important implications for the timing of vaccinations in certain patient groups, and may contribute to variability in disease susceptibility observed in humans.

Key Words: viral immunology, murine model, eosinophils, major histocompatibility complex tetramers, mucosal immunology


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