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. 1981 Jun;78(6):3343–3347. doi: 10.1073/pnas.78.6.3343

Establishment of the interferon-mediated antiviral state: possible role of superoxide dismutase.

R Pottathil, K A Chandrabose, P Cuatrecasas, D J Lang
PMCID: PMC319564  PMID: 6167983

Abstract

Superoxide dismutase (SOD; superoxide: superoxide oxidoreductase, EC 1.15.1.1) catalyzes the dismutation of O2- free radicals formed during various enzymatic reactions or by ionizing radiation. Genes coding for SOD and sensitivity to exogenous interferon (IF) are syntenic in both mouse and man. Diethyldithiocarbamate (DDC) has been shown to inhibit SOD activity by chelating Cu2+, the metal ion essential for the catalytic activity of the enzyme. Mouse cell lines L, L929, L1210 S6, and L1210 R3 and a human cell line (WISH) pretreated with homologous IF and different concentrations of DDC for various periods of time were tested for their ability to support virus multiplication. Treatment of cells with DDC resulted in dose- and time-dependent inhibition of SOD activity and, simultaneously, in the reduction of antiviral protection by exogenous IF. Cells pretreated for 4 hr with DDC and then washed thoroughly were also resistant to IF, but DDC was without effect if the IF effect was first "established" by a 4-hr exposure to IF before addition of DDC. Under the conditions employed, DDC treatment did not result in any detectable inhibition of DNA, RNA, or protein synthesis in these cells. The data suggest that SOD or a related Cu2+-requiring enzyme may be necessary for the establishment of the IF-induced antiviral state in both human and murine cells.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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