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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Activation of inducible nitric oxide synthase gene in murine macrophages requires protein phosphatases 1 and 2A activities.

The purpose of these studies was to identify phosphatase activities required for the production of nitric oxide in murine macrophages exposed to lipopolysaccharide (LPS), synthetic lipopeptide (LPP), and mouse interferon-gamma (IFN-gamma). The in vitro treatment of macrophages with IFN-gamma and LPS or IFN-gamma and LPP resulted in production of NO, which was inhibited by addition of the specific phosphatase 1 and 2A ( PP1/2A) inhibitors okadaic acid (OA), calyculin A, and cantharidin (but not the nonactive analogues okadaic acid tetraacetate and 1,4-dimethylendothall). OA suppressed the accumulation of steady-state inducible NO synthase (iNOS) mRNA and iNOS protein (without alteration of their stability). The cytosol and nuclei of control macrophages contained large amounts of PP1/2A activities that were inhibited by OA in a dose-dependent manner. Taken together, these data indicate that PP1/2A activities are involved in the regulation of iNOS gene expression in murine macrophages.[1]

References

  1. Activation of inducible nitric oxide synthase gene in murine macrophages requires protein phosphatases 1 and 2A activities. Dong, Z., Yang, X., Xie, K., Juang, S.H., Llansa, N., Fidler, I.J. J. Leukoc. Biol. (1995) [Pubmed]
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