J Biol Chem 1979 May 25;25410:4114-8.

Interferon priming. Effects on interferon messenger RNA.

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The effects of priming mouse cells with interferon on the production of interferon and its mRNA were investigated. Interferon-treated (primed) mouse L929 cells produce 3 to 10 times more interferon than do nonprimed cells following induction with Newcastle disease virus. Interferon appears 2 to 4 h sooner in the primed cultures than in nonprimed cultures and interferon production by primed cells becomes resistant to inhibition by actinomycin D about 4 h sooner than interferon production in nonprimed cells. Interferon mRNA is detected in primed-induced cells about 2 h earlier than in nonprimed-induced cells. It reaches peak levels about 2 to 4 earlier in primed cells, but it also disappears sooner in primed cells. The total amounts of interferon mRNA isolated from primed-induced cells and nonprimed-induced cells were indistinguishable, by the methods utilized. Therefore, although primed cells can produce significantly more interferon and make interferon mRNA sooner than nonprimed cells, the total amount of interferon mRNA produced is apparently not increased, nor is its half-life prolonged in primed cells. Thus, enhanced interferon production in primed cells may result from enhanced efficiency of translation of interferon mRNA in the primed cells.

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