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J Gen Virol 68 (1987), 2675-2679; DOI 10.1099/0022-1317-68-10-2675
© 1987 Society for General Microbiology
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Recombinant Human Interferon-{gamma} Inhibits Adenovirus Multiplication without Modifying Viral Penetration

A. S. Mistchenko{dagger}, R. A. Diez and R. Falcoff

Unité 196 INSERM, Institut Curie, Section de Biologie, 26, rue d'Ulm, 75231 Paris Cédex 05, France

We have recently reported that adenovirus replication is inhibited by human recombinant interferon-{gamma}, but not by recombinant interferon-{alpha}, in a dose-dependent manner. The aim of this study was to determine whether the antiviral effect of recombinant interferon-{gamma} could be linked to interferon-induced alteration at the membrane level, inhibiting either adenovirus penetration of or release from WISH cells. Adsorption and penetration were investigated with an 125I-labelled adenovirus binding assay. To test defective virus release, the presence of newly synthesized virus proteins in the cytoplasmic and nuclear compartments was investigated. Binding studies showed that interferons-{gamma} and -{alpha} did not modify adenovirus attachment and penetration. Interferon-{gamma} but not interferon-{alpha} inhibited hexon protein synthesis in the cytosol as well as its accumulation in the nuclear compartment. The synthesis of polypeptides III, IV and VI was also inhibited. In cells infected before interferon-{gamma} treatment, its addition could be delayed up to 2 h after the infection to produce an inhibition of virus yield greater than 1 log10 unit (90% inhibition). We conclude that interferon-{gamma} acts on an intracellular step before or at adenovirus protein synthesis, probably through a mechanism not shared with interferon-{alpha}.

Keywords: adenovirus, interferon-{gamma}, capsid polypeptides

{dagger} On leave from Laboratorio de Virología, Hospital de Niños ‘Ricardo Gutiérrez’, Buenos Aires, Argentina.

Received 12 March 1987; accepted 25 June 1987.




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Copyright © 1987 by the Society for General Microbiology.