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Bioassay-guided isolation and identification of active compounds from Macleaya microcarpa (Maxim) Fedde against fish pathogenic bacteria

文献类型: 外文期刊

作者: Kang, Yu-Jun 1 ; Yi, Yang-lei 1 ; Zhang, Chao 1 ; Wu, Shu-Qin 2 ; Shi, Cun-Bin 2 ; Wang, Gao-Xue 1 ;

作者机构: 1.Northwest A&F Univ, Yangling 712100, Shaanxi, Peoples R China

2.Chinese Acad Fishery Sci, Pearl River Fishery Res Inst, Guangzhou 510380, Guangdong, Peoples R China

关键词: alkaloids;Macleaya microcarpa;fish pathogenic bacteria;antibacterial agent

期刊名称:AQUACULTURE RESEARCH ( 影响因子:2.082; 五年影响因子:2.415 )

ISSN: 1355-557X

年卷期: 2013 年 44 卷 8 期

页码:

收录情况: SCI

摘要: Four alkaloids (Sanguinarine, 6-Methoxyl-dihydro-chelerythrine, Cryptopine and -Allocryptopine) were isolated from aerial parts of Macleaya microcarpa (Maxim) Fedde using bioassay-guided isolation method, and the inhibitory activity of ethanolic extract, various fractions and these four alkaloids against four fish pathogenic bacteria (Aeromonas hydrophila, Aeromonas salmonicida, Vibrio anguillarum and Vibrio harveyi) was assessed in vitro using the agar dilution method and the microdilution assay method respectively. A. hydrophila was the most sensitive strain to all the tested compounds. Minimum inhibitory concentration (MIC) values were lower for sanguinarine against all tested Gram-negative strains than other three alkaloids, with MIC values of 12.5mgL(-1) for A. hydrophila and 50mgL(-1) to other pathogenic bacteria. Followed by 6-methoxyl-dihydro-chelerythrine, which showed considerable antibacterial activity with MIC values of 80mgL(-1) for A. hydrophila, 100mgL(-1) for V. harveyi, and 125mgL(-1) for both V. anguillarum and A. salmonicida. Cryptopine and -allocryptopine revealed similar inhibitory activity with MIC values of 100mgL(-1) for A. hydrophila and 200mgL(-1) for other three bacterial species. These finding provided evidence that extract, as well as isolated compounds from M. microcarpa might be potential sources novel antibacterial agents for the treatment of fish infectious diseases.

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