An artificial tris-catecolate siderophore with a tripodal backbone and its conjugates with ampicillin and amoxicillin were synthesized. Both conjugates exhibited significantly enhanced in vitro antibacterial activities against Gram-negative species compared to the parent drugs, especially against
P. aeruginosa
. The conjugates appear to be assimilated by an induced bacterial iron transport process as their activities were inversely related to iron concentration. The easily synthesized tris-catecolate siderophores can be used with a variety of drugs as conjugates to target antibiotic-resistant Gram-negative bacteria.
合成了一种具有三脚架骨架的人工三
儿茶酚鞘
铁素及其与
氨苄
青霉素和
阿莫西林的结合物。与母药相比,这两种结合物在体外抗菌活性明显增强,特别是对
铜绿假单胞菌的抗菌活性。这些结合物似乎通过诱导的细菌
铁运输过程被同化,因为它们的活性与
铁浓度呈负相关。易于合成的三
儿茶酚鞘
铁素可以与各种药物结合,以靶向抗生素耐药的革兰氏阴性细菌。