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  • Title: Effects of secretory leukocyte protease inhibitor on the tumor necrosis factor-alpha production and NF-kappaB activation of lipopolysaccharide-stimulated macrophages.
    Author: Sano C, Shimizu T, Tomioka H.
    Journal: Cytokine; 2003 Jan 07; 21(1):38-42. PubMed ID: 12668158.
    Abstract:
    It has been reported that lipopolysaccharide (LPS)-hyporesponsiveness of macrophages (Mphis) of C3H/HeJ mice with a mutated Lps gene (Lps(d)) is related to high-level expression of secretory leukocyte protease inhibitor (SLPI) in response to LPS, causing suppression of NF-kappaB activation and tumor necrosis factor-alpha (TNF-alpha) production. We thus examined the effects of SLPI on the TNF-alpha production by LPS-stimulated Mphis. Neither intact SLPI nor half-sized SLPI (1/2 SLPI) down-regulated Mphi TNF-alpha production. 1/2 SLPI weakly increased Mphi TNF-alpha production in response to LPS signaling and potentiated the LPS-induced activation of NF-kappaB, especially the binding of p65-p50 heterodimers to the DNA kappaB sites, suggesting that LPS-hyporesponsiveness of Lps(d) Mphis is not due to the overexpression of SLPI.
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