强效和对盐不敏感的抗微生物分枝的设计
Janet To1, Xiaohong Zhang1, James P Tam1
1Synzymes and Natural Products Center (SYNC), School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore.
Polymers
|September 9, 2023
概括
素基架的分支酸具有强大,广泛的抗菌活性,与甲素基架不同. 这项研究揭示了设计有效的,对盐不敏感的抗微生物的结构方法.
科学领域:
- 生物化学 生物化学
- 药用化学 医学化学
- 分子生物学分子生物学
背景情况:
- 树突和分支是具有多种支架的多.
- 之前的研究报告了一种Lys基架抗微生物 dendrimer (D4R),具有广泛的,对盐不敏感的活性.
- 脚手架和抗微生物功效之间的关系以前是未定义的.
研究的目的:
- 设计和评估具有不同支架 (氨酸,异氨酸,氨酸,异氨酸) 的新型分枝类抗菌药物.
- 为了研究脚手架和抗微生物药物的功效之间的结构-活性关系.
- 为设计强效和对盐不敏感的树枝状或分枝状类抗菌素建立结构性方法.
主要方法:
- 合成四种新型的分枝类型,使用氨酸,异氨酸,甲氨酸或异氨酸支架.
- 对10种微生物的抗菌活性测定.
- 结构与活动关系研究,包括对二次结构形成的分析.
主要成果:
- 氨酸支架的α和e分支体表现出广泛的,对盐不敏感的抗菌活性,与D4R和塔基普莱辛 (MIC<1μM) 相似.
- 甲基因基架的α和δ分支是对盐敏感的,并且显著低于强度 (MIC 1至>500μM).
- 结构-活性关系研究表明,Lys支架有助于逆转,将RLYR四甲组织成并行β链,形成两性结构.
结论:
- 氨酸支架对于开发强效和对盐不敏感的分枝类抗菌素至关重要.
- 这些发现为设计下一代抗菌剂提供了结构性基础.
- 这项研究为强效的,对盐不敏感的树枝状或分支类抗菌素提供了合理的设计策略.
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