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结合体结构决定了LL-37自组装中的抗菌有效性,其中含有糖单酸盐

Jules D P Valentin¹, Parth Kadakia¹, Lucie J Varidel¹

¹Department of Chemistry and National Center of Competence in Research Bio-inspired Materials, University of Fribourg, Chemin du Musée 9, Fribourg, 1700, Switzerland.

Small (Weinheim an der Bergstrasse, Germany)

|October 16, 2024

概括

抗微生物LL-37,当与糖单酸盐 (GMO) 自组合时,显示结构依赖的抗菌活性. 类似LL-37/GMO的杆状菌体对Pseudomonas aeruginosa具有强烈的活性,与立方体或囊泡不同.

科学领域:

生物材料科学生物材料科学
抗微生物是一种抗微生物.
纳米技术纳米技术

背景情况:

抗微生物LL-37是一种潜在的抗生素替代品,其治疗疗效可能通过与脂质的自我组装来增强.
甘单酸 (GMO) 可以形成各种体结构,如立方体和囊泡,影响共同组装的分子的特性.

研究的目的:

研究LL-37与GMO的自我组装,并将由此产生的体结构与抗菌活性相关联.
确定不同LL-37/GMO结构对浮游生物和生物膜细菌生长的影响.

主要方法:

使用小角度X射线散射 (SAXS),动态光散射 (DLS) 和冷传输电子显微镜 (cryo-TEM) 来描述LL-37/GMO结构.
在实验室中进行了针对*Pseudomonas aeruginosa*和*Staphylococcus aureus*浮游生物和生物膜细胞的抗菌分析.

主要成果:

转基因中的LL-37含量增加诱导了从反向双连续立方体到多状囊泡,然后到直接的棒状混合细胞的结构过渡.
在LL-37/GMO圆柱状 (9/1和8/2的比率) 显示显著减少 (6-log) *P. aeruginosa*浮游生物细胞.
立方体和囊泡对*P. aeruginosa*和*S. aureus*的活性有限,囊泡甚至促进了*S. aureus*生物膜生物量.

结论:

由LL-37和GMO形成的体结构对于确定抗微生物药物的有效性至关重要.
棒状混合细胞是LL-37抗菌活性的一个有前途的纳米载体结构,而立方体和囊泡的效果不那么好.
这些发现为设计先进的脂质纳米载体提供了洞察力,用于增强的抗菌疗法.

关键词:

在LL-37上.萨克斯 (SAXS) 的时间抗微生物纳米材料抗微生物类的抗微生物.生物膜是一种生物膜.糖单酸盐是一种糖.结构-功能关系关系的结构.

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