从商业上可用的氨基酸构建块中获得克洛维巴克的强效类似物
Jackson E H Brunicardi1, Jeramiah J Small1,2, Maria Sophia Teresa Lee Padilla1
1Department of Chemistry, University of California─Irvine, Irvine, California 92697, United States.
The Journal of organic chemistry
|January 27, 2025
概括
研究人员通过用d-threonine取代罕见的氨基酸并增强疏水性来开发新的克洛维巴克类型. 这些新化合物对MRSA和VRE等耐药病原体表现出强大的抗生素活性.
科学领域:
- 药用化学 医学化学
- 有机化学 有机化学
- 微生物学 微生物学
背景情况:
- 克洛维巴克是一种强大的抗生素,有效对抗格拉姆阳性细菌.
- 耐药性病原体,如耐甲金色葡萄球菌 (MRSA) 和耐万科米菌 (VRE) 构成了严重的全球健康威胁.
- 非正规的氨基酸d-hydroxyasparagine对于克洛维巴克的活性至关重要,但在商业上没有.
研究的目的:
- 合成和评估具有改善可访问性和潜在增强活性的新型克洛维巴克类似物.
- 调查用d-threonine取代d-hydroxyasparagine并引入疏水性突变对抗生素功效的影响.
- 为了确定新的治疗药物对抗多药耐药的格拉姆阳性细菌.
主要方法:
- 标准合成技术被用来制造克洛维巴克的类似物.
- 氨基酸d-hydroxyasparagine被商业上可用的d-threonine所取代.
- 引入了氨酸残留在位置2,7和8的循环氨酸 (Cha) 的连续突变.
主要成果:
- 合成的类似物,特别是d-Cha2,d-Thr5-clovibactin,Cha7,d-Thr5-clovibactin和Cha8,d-Thr5-clovibactin,显示出高的抗生素活性.
- 这些类似物在≤1μg/mL的最小抑制度 (MIC) 中表现出卓越的功效.
- 修改后的类似物对具有挑战性的格兰阳性病原体有效,包括MRSA和VRE.
结论:
- 将d-hydroxyasparagine替换为d-threonine,加上战略性疏水性突变,产生高度活性的克洛维巴辛类似物.
- 这些新型类似物代表了对抗耐药性格拉姆阳性细菌引起的感染的有希望的候选者.
- 这些类似物的合成可访问性有助于进一步开发和潜在的临床应用.
相关概念视频
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