从3株海洋微生物发酵物的抗肿瘤活性部位分离鉴定了放线菌内酯素(1)、2-吡咯酸(2)、5,7,4'-三羟基异黄酮(3)、7,4'-二羟基异黄酮(4)、环(脯-甘)二肽(5)、N-甲酰基-星形孢菌素(6)、过氧化麦角甾醇(7)、6,9-环氧麦角甾-7,22-二烯-3-醇(8)等8个化合物。这些化合物分别产自2株放线菌L39-3(1和2)、L20-1d1(3-6)和1株真菌LJW-110(7和8)。抗肿瘤活性初步测试结果表明,除2和5以外对K562细胞均有不同程度抑制作用,在100μg/mL浓度下的抑制率约在32%-66%范围之内。
Two marine-derived actinomycete strains,L39-3 and L20-1d1,and a marine-derived fungal strain,LJW-110,were fermented to obtain EtOAc-extracts possessing antitumor activity.Eight compounds,1-2 from L39-3,3-6 from L20-1d1 and 7-8 from LJW-110,were isolated from the extracts and identified as actinolactomycin(1),2-pyrol acid(2),5,7,4'-trihydroxyisoflavone(3),7,4'-dihydroxyisoflavone(4) cyclo-(Pro-Gly)(5),N-formyl-staurosporine(6),ergosterol peroxide(7) and 6,9-epoxyergosta-7,22-dien-3-ol(8) respectively.In a preliminary bioassay using K562 cells,1,3,4 and 6-8 showed inhibitory effect with the inhibition rates within the range of 32%-66% to a different extent.