• Am J Chinese Med · Jan 2006

    Macrophage-mediated inhibitory effect of Zingiber officinale Rosc, a traditional oriental herbal medicine, on the growth of influenza A/Aichi/2/68 virus.

    • Nobuko Imanishi, Tsugunobu Andoh, Naoki Mantani, Shinya Sakai, Katsutoshi Terasawa, Yutaka Shimada, Miyuki Sato, Yuko Katada, Kyouka Ueda, and Hiroshi Ochiai.
    • Department of Oriental Medicine, Toyama Medical and Pharmaceutical University, Toyama 930-0194, Japan.
    • Am J Chinese Med. 2006 Jan 1; 34 (1): 157169157-69.

    AbstractThe inhibitory effect of Zingiber officinale Rosc (ZOR), an Oriental traditional herbal medicine, on the growth of influenza A/Aichi/2/68 (Aichi) virus was investigated in Madin-Darby canine kidney (MDCK) cells. Direct addition of ZOR (0.1 approximately 100 microg/ml) to the infected cells did not have any inhibitory effect. However, the ZOR-induced conditioned medium (ZOR-CM) of RAW cells, a murine macrophage (Mphi) cell line, exhibited an apparent inhibitory effect on MDCK cells without cytotoxicity. In accordance with the time-dependent inhibitory effect of ZOR-CM, it has been demonstrated that tumor necrosis factor (TNF)-alpha was gradually accumulated in ZOR-CM by the induction of TNF-alpha mRNA expression in ZOR-stimulated RAW cells. Conversely, the inhibitory effect of ZOR-CM was reduced significantly by the removal of TNF-alpha after the formation of an immune complex with anti-TNF-alpha monoclonal antibody. These data suggested that ZOR itself has no inhibitory effect on the growth of influenza virus, but could exert its effect via macrophage activation leading to production of TNF-alpha.

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