Recombinant Human Interferon- Inhibits Adenovirus Multiplication in Vitro

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Abstract
Summary The susceptibility of adenovirus to the inhibitory effect of human interferons in vitro was investigated. We tested recombinant human interferons-α2, -β1 and -γ against adenovirus serotypes 1 and 5 (group C), 3 and 7a (group B), and a wild strain isolated from an acutely ill child who later died. Pretreatment of WISH cells with interferon-γ for 24 h induced a dose-dependent inhibition of multiplication of all adenovirus strains tested, the TCID50 varying from 25 to 90 IU/ml. Human interferon-α2 was unable to decrease adenovirus multiplication, while interferon-β1 at 2000 IU/ml slightly lowered the yield of adenovirus. Similar results were obtained in HEp-2 and FS-4 cells, while A-549 and peripheral blood mononuclear cells were insensitive to interferon-γ. The difference between the effects of interferon-γ and interferon-α and -β on adenovirus multiplication in vitro suggests that its mechanism of antiviral action is different.