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  • Title: [The time-dependent stimulating action of hydrocortisone on mitochondrial RNA biosynthesis in the rat liver].
    Author: Minchenko AG.
    Journal: Probl Endokrinol (Mosk); 1989; 35(5):72-7. PubMed ID: 2479943.
    Abstract:
    Mitochondrial RNA biosynthesis was studied at different time after hydrocortisone administration. Hydrocortisone induced liver mitochondrial RNA biosynthesis in vivo and in isolated organellae 15 min., 1.5 and 4 h after hormone injection. As shown by means of molecular hybridization of RNA-DNA, an increase in liver mitochondrial RNA biosynthesis induced by hydrocortisone administration was due to an increase in the expression of all mitochondrial genes simultaneously rather than to selective enhancement of individual gene transcription. Hydrocortisone changed the biosynthesis and transport of cytoplasmic RNA in the liver of intact rats. The incorporation of 3H-UTP into RNA by isolated liver mitochondria of control and hydrocortisone-treated rats was inhibited by ethidium bromide. RNA biosynthesis in isolated rat liver mitochondria was unchanged in 15-300 min. of 0.9% NaCl administration.
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