Substituted salicylanilides as inhibitors of two-component regulatory systems in bacteria

被引:122
|
作者
Macielag, MJ [1 ]
Demers, JP [1 ]
Fraga-Spano, SA [1 ]
Hlasta, DJ [1 ]
Johnson, SG [1 ]
Kanojia, RM [1 ]
Russel, RK [1 ]
Sui, ZH [1 ]
Weidner-Wells, MA [1 ]
Werblood, H [1 ]
Foleno, BD [1 ]
Goldschmidt, RM [1 ]
Loeloff, MJ [1 ]
Webb, GC [1 ]
Barrett, JF [1 ]
机构
[1] RW Johnson Pharmaceut Res Inst, Raritan, NJ 08869 USA
关键词
D O I
10.1021/jm9803572
中图分类号
R914 [药物化学];
学科分类号
100701 ;
摘要
A new class of inhibitors of the two-component regulatory systems (TCS) of bacteria was discovered based on the salicylanilide screening hits, closantel (1) and tetrachlorosalicylanilide (9). A systematic SAR study versus a model TCS, KinA/SpoOF, demonstrated the importance of electron-attracting substituents in the salicyloyl ring and hydrophobic groups in the anilide moiety for optimal activity. In addition, derivatives 8 and 16, containing the 2,3-dihydroxy-benzanilide structural motif, were potent inhibitors of the autophosphorylation of the KinA kinase, with IC(50)s of 2.8 and 6.3 mu M, respectively. Compound 8 also inhibited the TCS mediating vancomycin resistance (VanS/VanR) in a genetically engineered Enterococcus faecalis cell line at concentrations subinhibitory for growth. Closantel (1), tetrachlorosalicylanilide (9), and several related derivatives (2, 7, 10, 11, 20) had antibacterial activity against the drug-resistant organisms, methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin-resistant Enterococcus faecium (VREF).
引用
收藏
页码:2939 / 2945
页数:7
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