Functional interaction of the immunosuppressant mizoribine with the 14-3-3 protein

Shu Takahashi, Hideki Wakui, Jan Åke Gustafsson, Johanna Zilliacus, Hideaki Itoh

    Research output: Contribution to journalArticlepeer-review

    86 Scopus citations

    Abstract

    Mizoribine (MIZ) is a novel imidazole nucleoside with immunosuppressive activity. MIZ has been approved in Japan and combination therapy with MIZ and glucocorticoids has been used after renal transplantation and for lupus nephritis and rheumatoid arthritis. In this study, we identify 14-3-3 proteins as MIZ-binding proteins. 14-3-3 proteins interact with many proteins involved in cellular signaling, including the glucocorticoid receptor (GR). The 14-3-3/GR interaction enhances the transcriptional activity of the receptor. We show that MIZ affects the conformation of 14-3-3 proteins and enhances the interaction of GR and 14-3-3 η dose dependently in vitro. MIZ also has a stimulatory effect on transcriptional activation by the GR. Our results point to the possibility that one mechanism for the therapeutic effect of MIZ could be to regulate the GR function via 14-3-3 proteins. (C) 2000 Academic Press.

    Original languageEnglish (US)
    Pages (from-to)87-92
    Number of pages6
    JournalBiochemical and Biophysical Research Communications
    Volume274
    Issue number1
    DOIs
    StatePublished - Jul 21 2000

    Keywords

    • 14-3-3
    • Glucocorticoid receptor
    • Immunosuppression
    • Mizoribine
    • Nuclear receptor
    • Transactivation

    ASJC Scopus subject areas

    • Biochemistry
    • Biophysics
    • Molecular Biology

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