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  • Title: The standardized extract of Ziziphus jujuba fruit (jujube) regulates pro-inflammatory cytokine expression in cultured murine macrophages: suppression of lipopolysaccharide-stimulated NF-κB activity.
    Author: Chen J, Du CY, Lam KY, Zhang WL, Lam CT, Yan AL, Yao P, Lau DT, Dong TT, Tsim KW.
    Journal: Phytother Res; 2014 Oct; 28(10):1527-32. PubMed ID: 24806434.
    Abstract:
    The fruit of Ziziphus jujuba Mill., known as jujube or Chinese date, is commonly consumed as a health supplement or herbal medicine worldwide. To study the beneficial role of jujube in regulating immune response, we investigated its roles on the expressions of pro-inflammatory cytokines in cultured macrophages. Application of chemically standardized jujube water extract for 24 h stimulated the transcriptional expression of interleukin (IL)-1β, IL-6, and tumor necrosis factor (TNF)-α in cultured RAW 264.7 macrophages. In contrast, the pretreatment with jujube water extract suppressed the expression of IL-1β and IL-6, but not for TNF-α in lipopolysaccharide (LPS)-stimulated macrophages. The IL-1β and IL-6 cytokines in LPS-induced macrophages were suppressed by jujube water extract in both mRNA and protein levels. In parallel, the inhibition of jujube water extract on the transcriptional activity of nuclear factor-kappa B was revealed in LPS-induced macrophages. These results verified the bidirectional immune-modulatory roles of jujube by regulating the expressions of pro-inflammatory cytokines in macrophages.
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