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J. Biochem, 1982, Vol. 91, No. 6 2021-2028
© 1982 Japanese Biochemical Society

research-article

Microinjection of Interferon and 2',5'-Oligoadenylate into Mouse L Cells and Their Effects on Virus Growth

Yujiro HIGASHI and Yoshihiro SOKAWA

Department of Cellular and Molecular Virology, Institute for Virus Research, Kyoto University Sakyo-ku, Kyoto, Kyoto 606

By means of a new type of microinjection apparatus, which has a micropipette located in a hole through the optical axis of the condenser lens, we injected interferon (IFN) or 2',5'-oligoadenylate (2-5A) into mouse L cells, and observed their antiviral effects on the multiplication of vesicular stomatitis virus (VSV). After injection, cells were infected with VSV, and labeled with [3H]uridine in the presence of actinomycin D. The proportion of cells infected with VSV which carried radioactive virus-RNA was determined by autoradiography. IFN introduced directly into L cells had no effect on the virus growth. This result supports the idea that IFN molecules exert their effect from outside the cell membrane without penetrating into the cytoplasm. 2-5A, on the other hand, was able to inhibit the growth of VSV effectively when injected into L cells. The antiviral effect was dependent on the dose of 2-5A injected, and moreover the effect was transient, since it disappeared completely after 24-h incubation.


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