Antimicrobial Activity of the Marine Alkaloids, Clathrodin and Oroidin, and Their Synthetic Analogues
作者:Nace Zidar、Sofia Montalvão、Žiga Hodnik、Dorota Nawrot、Aleš Žula、Janez Ilaš、Danijel Kikelj、Päivi Tammela、Lucija Mašič
DOI:10.3390/md12020940
日期:——
fungal strain (Candida albicans), and oroidin was found to possess promising Gram-positive antibacterial activity. Using oroidin as a scaffold, 34 new analogues were designed, prepared and screened for their antimicrobial properties. Of these compounds, 12 exhibited >80% inhibition of the growth of at least one microorganism at a concentration of 50 µM. The most active derivative was found to be 4-phenyl-2-aminoimidazole
海洋生物产生的次级代谢物可能对开发新的药物先导物很有价值,也可以为设计和合成新的生物活性化合物提供结构支架。海洋生物碱、clathrodin 和 oroidin 最初是从 Agelas 属的海绵中分离出来的,它们被制备并评估了它们对三种细菌菌株(粪肠球菌、金黄色葡萄球菌和大肠杆菌)和一种真菌菌株(白色念珠菌)的抗菌活性,并且发现 oroidin 具有有希望的革兰氏阳性抗菌活性。使用 oroidin 作为支架,设计、制备了 34 种新类似物并筛选了它们的抗菌特性。在这些化合物中,12 种在 50 µM 的浓度下表现出对至少一种微生物生长的抑制 > 80%。发现活性最强的衍生物是 4-苯基-2-氨基咪唑 6 小时,其对革兰氏阳性菌的 MIC₉₀(最低抑制浓度)值为 12.5 µM,对大肠杆菌为 50 µM。发现金黄色葡萄球菌和哺乳动物细胞之间的选择性指数对于化合物 6h 为 2.9,这在评估化合物作为抗菌先导物的潜力时很重要。