通过放射性两性抗微生物的细菌脂的螺旋性定向识别
Yangbin Liang1,2, Yuhao Zhang1,2, Yu Huang3
1School of Biomedical Sciences and Engineering, South China University of Technology, Guangzhou International Campus, Guangzhou 511442, P. R. China.
Science advances
|August 30, 2024
概括
研究人员开发了新的放射性两性阿尔法螺旋抗菌 (RAP),可以选择性地向细菌酸盐 (PG) 而不是哺乳动物酸盐 (PS). 这一发现为设计有效和安全的抗菌剂提供了一个有希望的策略.
科学领域:
- 生物化学和分子生物学
- 发现抗微生物药物 发现抗微生物药物
- 膜生物物理学 膜生物物理学
背景情况:
- 细菌和哺乳动物的细胞膜在脂组成上有着根本的不同,这为抗菌设计提供了机会.
- 区分细菌离子脂酸盐 (PG) 和哺乳动物离子酸盐 (PS) 是具有挑战性的,因为它们的净电荷相似.
研究的目的:
- 开发一种新型的抗微生物类 (AMP),能够选择性地识别和向细菌PG.
- 研究这些AMP区分细菌PG和哺乳动物PS的机制.
主要方法:
- 放射性两性阿尔法螺旋抗菌 (RAPs) 的设计和合成.
- 使用生物物理技术,研究L10-MMBen与脂糖醇 (PG) 和脂 (PS) 囊泡的相互作用.
- 在小鼠感染模型中评估L10-MMBen的抗菌活性,选择性,体内毒性和疗效.
主要成果:
- 一个代表性的RAP,L10-MMBen,可以选择性地将PG囊泡结合并重新排列成一个状结构,其螺旋轴与膜平行.
- 螺旋结构和RAP的疏水区掩盖对于选择性PG识别至关重要.
- L10-MMBen对细菌具有很高的选择性,体内毒性低,在治疗小鼠感染方面具有显著的疗效.
结论:
- 放射性两性阿尔法螺旋抗菌 (RAPs) 可以根据脂结构有效地区分细菌PG和哺乳动物PS.
- 螺旋式定向脂识别为设计高度选择性和强效的抗微生物提供了一个新的范式.
- L10-MMBen代表了开发下一代抗微生物疗法的有希望的化合物,其宿主毒性降低.
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