Abstract
A technique is described for measurement of the antiviral activity of interferon by an immunoenzymatic assay for viral proteins. Cells treated by tested samples of interferon (IFN) are infected with vesicular stomatitis virus (VSV) and following the development of viral cytopathy are lysed by the addition of deoxycholate and then transferred into ELISA microplates. The viral proteins bind effectively to the microplates proportionally to their level in the culture and may be measured by incubating the plates sequentially with (1) rabbit antiserum against VSV, (2) a conjugate of alkaline phosphatase either to protein A or to an antibody against rabbit IgG and (3) p-nitrophenylphosphate. This procedure may be further simplified by using antibodies against VSV to which alkaline phosphatase has been directly conjugated. We found this immunoenzyme assay to be superior to the 'cytophatic effect inhibition' assay in precision and sensitivity and in being independent of the effectiveness of viral cytopathy.
Original language | English |
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Pages (from-to) | 279-287 |
Number of pages | 9 |
Journal | Journal of Immunological Methods |
Volume | 72 |
Issue number | 1 |
DOIs | |
State | Published - 3 Aug 1984 |
Externally published | Yes |
Keywords
- interferon assay
- viral protein assay