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不同度的AmB对不和脂-胆固醇膜的影响,使用Langmuir单层和脂质体模型

Juan Wang¹, Jia Wang², Mingyue Zheng¹

¹Xi'an Key Laboratory of Advanced Photo-Electronics Materials and Energy Conversion Device, School of Electronic Information, Xijing University, Xi'an 710123, China.

Molecules (Basel, Switzerland)

|December 17, 2024

概括

对于红细胞膜的光素B (AmB) 毒性与其度有关. 较高的AmB水平会破坏富含胆固醇的区域,可能减少其有害影响.

科学领域:

生物化学生物化学
膜生物物理学膜生物物理学
药理学药理学是指药理学的学科.

背景情况:

氨酸B (AmB) 对于治疗侵袭性真菌感染至关重要.
AmB的红细胞膜毒性,导致血液溶解,限制了其临床剂量.
AmB-红细胞相互作用的精确分子机制,特别是在富含胆固醇的领域内,仍然不清楚.

研究的目的:

为了研究安二乙烯 (AmB) 与含有胆固醇的不和脂膜的吸附和相互作用机制.
阐明AmB度的变化如何影响这些膜的结构和热力学特性.
了解AMB诱导的红细胞膜毒性的分子基础.

主要方法:

兰木尔单层模型和布鲁斯特角度显微镜 (BAM) 用于研究DOPC/胆固醇单层.
大型单层囊泡脂质体和光技术用于分析DOPC双层.
在5,45,85和125微克/毫升的度下,研究了AMB吸附.

主要成果:

5μg/mL以上的AmB度增加了DOPC/胆固醇单层的重组时间和弹性模量.
高AmB度 (>85μg/mL) 导致BAM图像中的液体凝聚域减少,液体膨胀域扩大.
增加的AmB度在DOPC/胆固醇双层的疏水和疏水性域中都引起了高度的障碍.
较高的AmB度促进了胆固醇从脂膜中去除.

结论:

AmB与含胆固醇的脂膜的相互作用取决于度.
增加的AmB度会破坏膜结构,特别是通过去除胆固醇.
结果提供了关于AmB红细胞毒性的见解,并指导了减少其不良影响的策略.

关键词:

氨基氨酸B (Amphotericin B) 是一种氨基氨酸.这就是BAM BAM BAM.朗格穆尔单层的一层.脂质体组是什么? 脂质体组是什么?红细胞的膜.

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