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    Blood. 2000 Mar 15;95(6):1891-9.

    Evidence that tristetraprolin is a physiological regulator of granulocyte-macrophage colony-stimulating factor messenger RNA deadenylation and stability.

    Carballo E, Lai WS, Blackshear PJ.

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    Office of Clinical Research and Laboratory of Signal Transduction, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709, USA.

    Abstract

    Deficiency of tristetraprolin (TTP), the prototype of the CCCH zinc finger proteins, results in a complex inflammatory syndrome in mice. Most aspects of the syndrome are secondary to excess circulating tumor necrosis factor (TNF)-alpha, a consequence of increased stability of TNF-alpha messenger RNA (mRNA) in TTP-deficient macrophages. TTP can bind directly to the AU-rich element in TNF-alpha mRNA, increasing its lability. Here we show that TTP deficiency also results in increased cellular production of granulocyte-macrophage colony-stimulating factor (GM-CSF) and increased stability of its mRNA, apparently secondary to decreased deadenylation. Similar findings were observed in mice also lacking both types of TNF-alpha receptors, excluding excess TNF-alpha production as a cause of the increased GM-CSF mRNA levels and stability. TTP appears to be a physiological regulator of GM-CSF mRNA deadenylation and stability. (Blood. 2000;95:1891-1899)

    PMID:
    10706852
    [PubMed - indexed for MEDLINE]
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