Novel Trisubstituted Benzimidazoles, Targeting <i>Mtb</i> FtsZ, as a New Class of Antitubercular Agents
作者:Kunal Kumar、Divya Awasthi、Seung-Yub Lee、Ilaria Zanardi、Bela Ruzsicska、Susan Knudson、Peter J. Tonge、Richard A. Slayden、Iwao Ojima
DOI:10.1021/jm1012006
日期:2011.1.13
GTPase activity of Mtb FtsZ. The result strongly suggests that the increased GTPase activity destabilizes FtsZ assembly, leading to efficient inhibition of FtsZ polymerization and filament formation. The TEM and SEM analyses of Mtb FtsZ and Mtb cells, respectively, treated with a lead compound strongly suggest that lead benzimidazoles have a novel mechanism of action on the inhibition of Mtb FtsZ assembly
通过合理的药物设计创建了新型三取代苯并咪唑文库。大量这些苯并咪唑表现出有希望的 MIC 值在 0.5-6 μg/mL (2-15 μM) 范围内,因为它们对Mtb H37Rv 菌株具有抗菌活性。此外,五种先导化合物还对具有不同耐药性的临床Mtb菌株表现出优异的活性。所有先导化合物对 Vero 细胞均未表现出明显的细胞毒性(IC 50 > 200 μM),其以剂量依赖性方式抑制Mtb FtsZ 组装。这两种先导化合物出人意料地显示出Mtb的 GTPase 活性增强FtsZ。结果强烈表明,增加的 GTPase 活性使 FtsZ 组装不稳定,从而有效抑制 FtsZ 聚合和细丝形成。分别用先导化合物处理的Mtb FtsZ 和Mtb细胞的 TEM 和 SEM 分析强烈表明,苯并咪唑铅对抑制Mtb FtsZ 组装和 Z 环形成具有新的作用机制。