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Antibacterial Effects of Afzelin Isolated from Cornus macrophylla on Pseudomonas aeruginosa A Leading Cause of Illness in Immunocompromised Individuals

机译:从山茱A中分离出的非洲菊素对铜绿假单胞菌的免疫作用铜绿假单胞菌是免疫功能低下个体疾病的主要原因

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摘要

The crude ethyl acetate extract of the leaves of Cornus macrophylla showed antibacterial activity against Pseudomonas aeruginosa, a leading cause of illness in immunocompromised individuals. Bioactivity-guided separation led to the isolation of kaempferol 3-O-α-L-rhamnopyranoside (afzelin). The structure was determined based on evaluation of its spectroscopic (UV, MS, and NMR) data. The minimum inhibitory concentration (MIC) of afzelin against Pseudomonas aeruginosa was found to be 31 µg/mL. In addition, the results indicated that a hydroxyl group at C3 of the C-ring of the flavone skeleton and the rhamnose group may act as a negative factor and an enhancing factor, respectively, in the antibacterial activities of afzelin.
机译:山茱Corn叶的乙酸乙酯提取物粗略显示对铜绿假单胞菌具有抗菌活性,铜绿假单胞菌是免疫功能低下者疾病的主要原因。生物活性指导下的分离导致分离出山萘酚3-O-α-L-鼠李吡喃糖苷(黄素)。根据对它的光谱(UV,MS和NMR)数据的评估确定结构。发现afzelin对铜绿假单胞菌的最小抑制浓度(MIC)为31μg/ mL。此外,结果表明黄酮骨架的C环的C 3处的羟基和鼠李糖基团可能分别对afzelin的抗菌活性起负因子和增强作用。

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