头孢霉AL031真菌次生代谢产物的抗菌活性研究

采用滤纸片法 ,以 11株革兰氏阳性或阴性细菌为指示菌 ,对从头孢霉AL0 31真菌次生代谢产物中分离到的 14个化合物进行了体外抗细菌活性筛选。结果表明 :新化合物 :S ( ) 5 羟基蜂蜜曲菌素、S ( ) 7 羟基蜂蜜曲菌素和已知化合物 :蜂蜜曲菌素、2 ,4 -二羟基 3,6 二甲基苯甲酸、3,6 二羟基 2 ,4 二甲基苯甲酸、琥珀酸具有广谱的抗细菌活性 ,采用杯碟法 ,以三种细菌为指示菌 ,测定了具有抗菌活性的 6个化合物的最低抑菌浓度 (MIC) ,其MIC为 0 0 312 5～ 0 5mg/ml。

Studies on Antibacterial Activities of Secondary Metabolites from Fungus Cephalosporium sp.AL031

The antibacterial activity of fourteen identified compounds from secondary metabolites of fungus Cephalosporium sp. AL031 against eleven gram-positive or gram-negative bacteria in vitro was investigated by agar diffusion assay. The results suggested that two new compounds [S-(+)-5-hydroxymellein, S-(+)-7-hydroxymellein], together with four known compounds [S-(+)-mellein, 2,4-dihydroxy-3,6-dimethylbenzoic acid, 3,6-dihydroxy-2,4-dimethylbenzoic acid and succinic acid] had broad spectrum antibacterial activity. The minimum inhibitory concentrations (MIC) of these six compounds against Shigella sonnei, Mycobacterium tuberculosis and Streptococcus pneumoniae were determined. Their MIC were 0.03125 to approximately 0.5 mg/ml.