基质衍生型Sortase A抑制剂:向格拉姆阳性病原性细菌的重要毒性因子
Helal Abujubara1, Jordi C J Hintzen1, Shadi Rahimi2
1Department of Chemistry and Molecular Biology, Wallenberg Centre for Molecular and Translational Medicine, University of Gothenburg Kemigården 4 412 96 Göteborg Sweden alesia.a.tietze@gu.se.
Chemical science
|June 30, 2023
概括
研究人员开发了针对细菌Sortase A (SrtA) 的新型皮多米米特抑制剂,这是一个重要的毒性因子. 最强的抑制剂,LPRDSar,显示出强烈的活性,一些化合物抑制了金黄色葡萄球菌的生长和生物膜的形成,提供了潜在的新疗法.
科学领域:
- 微生物学 微生物学
- 药用化学 医学化学
- 生物化学 生物化学
背景情况:
- 排列酶A (SrtA) 是一种关键的细菌表面酶,也是Gram阳性病原体的毒性因子.
- 对于诸如败血性关节炎等感染,SrtA是必不可少的,但缺乏有效的抑制剂.
- SrtA 在其自然目标上识别特定的LPXTG排序信号.
研究的目的:
- 为了合成和评估新型的Sortase A (SrtA) 胺抑制剂.
- 探索这些抑制剂对病原性细菌的潜力,包括金黄色葡萄球菌.
- 确定用于治疗SrtA相关感染的药物线索.
主要方法:
- 基于SrtA LPXTG分类信号的类药物的设计和合成.
- 计算绑定分析以指导抑制剂设计.
- 使用FRET兼容基质进行体外酶定试验以确定IC50值.
- 对黄金葡萄球菌 (Staphylococcus aureus) 的生长和生物膜形成的抑制剂作用的评估.
主要成果:
- 几种胺抑制剂显示IC50值低于200微米.
- 抑制剂LPRDSar的强大IC50为18.9微米.
- 三种化合物,特别是具有环的化合物 (例如,BzLPRDSar),在低度下有效地抑制了S. aureus的生长和生物膜的形成.
结论:
- 基于SrtA识别动机的类仿制药是有效的抑制剂.
- BzLPRDSar显示出作为对抗黄金色杆菌感染的药物头的承诺,包括MRSA.
- 准SrtA为诸如败血性关节炎等疾病提供了潜在的治疗策略.
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