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  • Title: Induction of hepatic tyrosine aminotransferase mRNA by protein synthesis inhibitors.
    Author: Ernest MJ, DeLap L, Feigelson P.
    Journal: J Biol Chem; 1978 May 10; 253(9):2895-7. PubMed ID: 25275.
    Abstract:
    Several protein synthesis inhibitors were as effective as the inducers hydrocortisone or cyclic AMP in elevating rat liver tyrosine aminotransferase mRNA levels when assayed in the wheat germ cell-free translational system. Cycloheximide, emetine, or puromycin increased this mRNA activity 6- to 7-fold within 4 h after in vivo administration. No increase in total hepatic mRNA levels or tryptophan oxygenase mRNA was found after treatment with these protein synthesis inhibitors. Furthermesults suggest that a short lived protein may specifically regulate the level of functional hepatic tyrosine aminotransferase mRNA or that ongoing translation of this mRNA is required for its degradation.
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