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    Title: Propofol inhibits lipopolysaccharide-induced lung epithelial cell injury by reducing hypoxia-inducible factor-1α expression
    Authors: C.-H.Yeh
    Contributors: 化粧品應用與管理系
    Keywords: acute lung injury
    propofol sepsis
    Date: 2011-03
    Issue Date: 2013-06-03 15:53:08 (UTC+8)
    Publisher: Oxford University Press
    Abstract: Background Lipopolysaccharide (LPS) may activate hypoxia-inducible factor (HIF)-1α, which up-regulates cytokine expression and the lethality of LPS-induced shock. We investigated the effect of propofol on HIF-1α expression and acute lung injury in LPS-treated mice.

    Methods A series of both positive and negative control experiments were performed. We injected BALB/C mice with propofol or vehicle i.p. immediately and 12 h after an LPS challenge. After 24 h, we examined the lung wet/dry weight ratio, neutrophil infiltration, and HIF-1α mRNA expression and inflammatory cytokines in the lung tissue. Survival was determined for 48 h after LPS injection. In vitro, we determined the responses of A549 cells, with and without HIF-1α silenced, to treatment with LPS alone and LPS plus propofol.

    Results Propofol prolonged survival and attenuated acute lung injury and decreased the expression of HIF-1α, interleukin (IL)-6, keratinocyte-derived chemokine, and tumour necrosis factor-alpha (TNF-α) in the lungs of endotoxaemic mice. In HIF-1α knockdown-A549 cells, LPS-induced TNF-α, IL-6, and the pro-apoptotic gene, BNIP3 expression and apoptosis were reduced. Propofol, but not an inhibitor of nuclear factor κB, reduced HIF-1α expression in LPS-stimulated A549 cells. Propofol also down-regulated, in A549 cells, the expression of IL-6, IL-8, and TNF-α, Bcl-2/adenovirus E1B 19 kDa interacting protein 3 (BNIP3), and apoptosis.

    Conclusions Propofol reduces apoptosis in LPS-stimulated lung epithelial cells by decreasing HIF-1α, BNIP3, and cytokine production. Using propofol to inhibit HIF-1α expression may protect against the acute lung injury caused by LPS-induced sepsis.
    Relation: British Journal Anaesthesia 106(4), pp. 590-599
    Appears in Collections:[Dept. of Cosmetic Science and institute of cosmetic science] Periodical Articles

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