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    Please use this identifier to cite or link to this item: http://asiair.asia.edu.tw/ir/handle/310904400/17400

    Title: Anti-inflammatory Activities of 6β-Acetoxy-7r-hydroxyroyleanone from Taiwania cryptomerioides Hayata ex Vivo and in Vivo
    Authors: 鄧正賢;Deng, Jeng-Shyan
    Contributors: 保健營養生技學系
    Keywords: 6β-acetoxy-7R-hydroxyroyleanone, anti-inflammation, NO, TNF-R
    Date: 2011-09
    Issue Date: 2012-11-26 10:32:30 (UTC+8)
    Abstract: "Excess production of nitric oxide (NO) by inducible NO synthase (iNOS) in activated macrophages is linked to acute
    and chronic inflammation. Thus, it would be valuable to develop inhibitors of NO production and/or iNOS for potential therapeutic
    use. This study investigated the anti-inflammatory effects of 6β-acetoxy-7R-hydroxyroyleanone (AHR), a compound isolated from
    the bark of Taiwania cryptomerioides Hayata, using lipopolysaccharide (LPS)-stimulated mouse macrophage (RAW 264.7) ex vivo
    and carrageenan (Carr)-induced mouse paw edema model in vivo. When RAW 264.7 macrophages were treated with different
    concentrations of AHR (0, 0.31, 0.62, 1.25, and 2.50 μg/mL) together with LPS (100 ng/mL), a significant concentrationdependent inhibition of NO production was detected. Western blotting revealed that AHR blocked protein expression of iNOS and
    cyclooxygenase-2 (COX-2) in LPS-stimulated RAW 264.7 macrophages, significantly. In the anti-inflammatory test, AHR (1.25 and
    2.50 mg/kg) decreased paw edema at 4 and 5 h after λ-carrageenan (Carr) administration and increased the activities of catalase
    (CAT), superoxide dismutase (SOD), and glutathione peroxidase (GPx) in the liver tissue. It was also demonstrated that AHR
    significantly attenuated the malondialdehyde (MDA) level in the edema paw at 5 h after Carr injection. AHR (0.62, 1.25, and
    2.50 mg/kg) decreased the NO levels on both edema paw and serum at 5 h after Carr injection. Also, AHR diminished the serum
    tumor necrosis factor (TNF-R) at 5 h after Carr injection. Western blotting revealed that AHR (2.50 mg/kg) decreased Carrinduced iNOS and COX-2 expressions at 5 h in the edema paw. An intraperitoneal (ip) injection treatment with AHR also
    diminished neutrophil infiltration into sites of inflammation, as did indomethacin (Indo). The anti-inflammatory activities of AHR
    might be related to the decrease in the levels of MDA, iNOS, and COX-2 in the edema paw and to the increase in the activities of
    CAT, SOD, and GPx in the liver through the suppression of TNF-R and NO."
    Appears in Collections:[食品營養與保健生技學系] 期刊論文

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