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在性介质中重新乙基化奇托和蛋白之间的相互作用
Inesa V Blagodatskikh1, Oxana V Vyshivannaya2, Nikita A Tishchenko1
1A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova St. 28, bld. 1, Moscow, 119334, Russia.
Carbohydrate research
|September 19, 2024
概括
在生理pH值下,N-reacetylated基托衍生物与牛血清蛋白形成可溶性复合物. 较高的乙化度降低了结合亲和力,这表明了血液相容的药物递送系统的潜力.
科学领域:
- 生物材料科学 生物材料科学
- 聚合物化学 聚合物化学
- 生物化学 生物化学
背景情况:
- 基托桑衍生品正在探索药物输送.
- 了解与血液蛋白的相互作用对于生物相容性至关重要.
- 抗菌奇托桑/蛋白质系统需要在生理条件下进行研究.
研究的目的:
- 为了研究N-reacetylated oligochitosans (RA-CHI) 和牛血清白蛋白 (BSA) 之间的相互作用.
- 描述在血液pH相关条件下形成的复合物.
- 评估乙化度和离子强度对结合的影响.
主要方法:
- 光散射以确定复杂的尺寸和形状.
- 循环二极化和光光谱法来评估BSA的二次结构.
- 异热定位热量计用于研究结合热力学和结合力.
- 微红外光谱学用于结构分析.
主要成果:
- RA-CHI形成可溶性,球形复合体 (大约. 100纳米半径) 在pH值7.4和低离子强度的BSA.
- 在复杂化后,BSA的二次结构保持完整.
- 静电力对结合有显著的贡献,其中酸盐是电离的.
- 增加的离子强度 (0.15M) 抑制了结合.
- 更高的RA-CHI乙化度降低了亲和力,并改变了相互作用机制.
结论:
- 在生理条件下,N-reacetylated chitosan衍生物可以与 BSA 形成稳定的复合物.
- 相互作用对离子强度和乙化度敏感.
- 这些发现支持RA-CHI在血液兼容的基于蛋白质的药物输送系统中的潜在应用.
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