The marine natural product, marinopyrrole A (1), was previously shown to have significant antibiotic activity against Gram-positive pathogens, including methicillin-resistant Staphylococcus aureus (MRSA). Although compound (1) exhibits a significant reduction in MRSA activity in the presence of human serum, we have identified key modifications that partially restore activity. We previously reported our discovery of a chloro-derivative of marinopyrrole A (1a) featuring a 2–4 fold improved minimum inhibitory concentration (MIC) against MRSA, significantly less susceptibility to serum inhibition and rapid and concentration-dependent killing of MRSA. Here, we report a novel fluoro-derivative of marinopyrrole A (1e) showing an improved profile of potency, less susceptibility to serum inhibition, as well as rapid and concentration-dependent killing of MRSA.
海洋
天然产物马里诺
吡咯A(1)先前显示出对革兰氏阳性病原体,包括耐
甲氧西林金黄色葡萄球菌(MRSA)具有显著的抗生素活性。尽管化合物(1)在存在人类血清时对MRSA的活性显著降低,但我们已确定了关键的修饰,这些修饰部分恢复了活性。我们之前报告了马里诺
吡咯A的一个
氯衍
生物(1a)的发现,其对MRSA的最小抑菌浓度(MIC)提高了2-4倍,并且对血清抑制的敏感性显著降低,同时能迅速和依赖浓度杀灭MRSA。在这里,我们报告了马里诺
吡咯A的一个新的
氟衍
生物(1e),显示出更好的效力特征,对血清抑制的敏感性降低,以及对MRSA的迅速和依赖浓度的杀灭能力。