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  • Title: New simple dye-uptake assay for interferon.
    Author: Imanishi J, Hoshino S, Hoshino A, Oku T, Kita M, Kishida T.
    Journal: Biken J; 1981 Sep; 24(3):103-8. PubMed ID: 6175308.
    Abstract:
    Using the spectrophotometer that the authors developed, the amounts of human leukocyte and mouse L cell interferons on FL cells and L929 cells were measured and values were compared with those measured by the cytopathogenic effect (CPE) reduction method (CPE method). The spectrophotometric method, which was simpler than the original dye-uptake method, was found to be more sensitive than the latter. When Sindbis virus was used instead of vesicular stomatitis virus (VSV), there were no significant differences in the sensitivities of the two methods or the interferon titers estimated. When FL cells or L929 cells were treated with interferon at the time of their dispersion, their interferon titers were almost the same as those of cells treated with interferon 2 days after dispersion. It is concluded that this new dye-uptake method is useful for assay of human and mouse interferons.
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