Lysobactin 的总合成
Aikomari Guzman-Martinez1, Ryan Lamer, Michael S VanNieuwenhze
1Department of Chemistry and Biochemistry, University of California at San Diego, La Jolla, California 92093, USA.
Journal of the American Chemical Society
|April 17, 2007
概括
新型抗生素lysobactin对MRSA和VRE等耐药细菌表现出强烈的活性. 它独特的抑制酸甘形成的机制为具有挑战性的感染提供了有前途的新治疗策略.
科学领域:
- 微生物学 微生物学
- 药用化学 医学化学
- 药物发现 药物发现 药物发现
背景情况:
- 抗生素耐药性是全球主要的健康威胁,需要开发具有新型作用机制的新药.
- 现有的抗生素对抗多药耐药细菌菌株的效果越来越差.
- 莱索巴克是一种depsipeptide抗生素,具有针对耐药病原体的强大活性.
研究的目的:
- 评估lysbactin对抗性细菌菌株的抗菌活性.
- 为了研究lysobaktin的作用机制.
- 开发lysobaktin及其类型的合成途径.
主要方法:
- 进行了最小抑制度 (MIC) 测定,对抗耐甲基金色葡萄球菌 (MRSA) 和抗万科胺素的肠球菌 (VRE).
- 评估了lysobactin对糖素形成的影响.
- 采用了涉及宏循环化的融合合成策略来生产lysobctin.
主要成果:
- 莱索巴克对MRSA和VRE表现出强烈的抗菌活性,MIC范围为0.39至0.78微克/毫升.
- 针对VRE,lysobactin的MIC比科米辛低50倍以上.
- 莱索巴克通过一种与万科米不同的机制抑制了新生的酸甘油的形成.
结论:
- 莱索巴克是治疗抗生素耐药细菌引起的感染的有希望的候选药物.
- 独特的作用机制和强烈的活性使得lysobaktin对进一步研究具有价值.
- 开发的合成为创建和研究lysobaktin类似物提供了基础.
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