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Journal Article
Research Support, Non-U.S. Gov't
Relationship between 24-hour rhythm in antiviral effect of interferon-beta and interferon-alpha/beta receptor expression in mice.
Japanese Journal of Pharmacology 2002 December
The influence of interferon-beta (IFN-beta) dosing time on antiviral activity was investigated in ICR male mice under light-dark cycle conditions (lights on at 07:00, off at 19:00) with food and water available ad libitum. There was a significant dosing time-dependent change in 2',5'-oligoadenylate synthetase (2',5'-OAS) activities, as an index of antiviral activity, in liver at 12 h after IFN-beta (15 MIU/kg, i.v.) injection. IFN-beta-induced 2',5'-OAS activity was more potent after the drug injection during the late dark phase. The higher antiviral effect of IFN-beta was observed when the interferon-alpha/beta receptor (IFNAR) expression in the liver increased, and the lower effect was observed when its expression decreased. IFN-beta-induced fever was more serious after IFN-beta injection from the late dark phase to the early light phase. A significant dosing time-dependent change was demonstrated for plasma IFN-beta concentrations, which showed a higher level during the light phase and a lower level during the dark phase. The dosing time-dependent change of plasma IFN-beta concentrations was not associated with that of the antiviral effect or fever induced by IFN-beta. These results suggest that selecting the most suitable dosing time of IFN-beta, associated with the 24-h rhythm of IFNAR expression in the liver, may be important to increase effectively the antiviral activity of the drug in experimental and clinical situations.
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