Abstract
Mouse guanylate-binding protein 3 (mGBP3) is a 71-kDa GTPase which belongs to GTP-binding protein family. The present study showed that the expression of mGBP3 transcript was readily induced in a dose dependent fashion in the macrophage cell line RAW264.7 treated with either interferon-γ (IFN-γ) or lipopolysaccharide (LPS). The expression of mGBP3 protein was also apparent by 4 and 6 h after the treatment of cells with IFN-γ (100 U/ml) or LPS (1 μg/ml), and remained at plateau for at least 24 h. Cycloheximide (10 μg/ml) had no effect on the IFN-γ- or LPS-induced mGBP3 expression, suggesting that the mGBP3 induction did not require further protein synthesis. Interestingly, a protein kinase C (PKC) inhibitor staurosporine (50 nM) abolished the induction of mGBP3 expression by LPS, but not by IFN-γ. These findings suggest that mGBP3 may be involved in the macrophage activation process and both IFN-γ and LPS induce the mGBP3 expression through distinct signal transduction pathways.
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Han, B.H. Interferon-γ and lipopolysaccharide induce mouse guanylate-binding protein 3 (mGBP3) expression in the murine macrophage cell line RAW264.7. Arch Pharm Res 22, 130–136 (1999). https://doi.org/10.1007/BF02976536
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DOI: https://doi.org/10.1007/BF02976536