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通过大分子绳索的表面交叉连接增强了类似病毒的粒子对粘膜压力因素的弹性
Ahmed Ali1, Suwannee Ganguillet1, Yagmur Turgay1
1Department of Health Sciences and Technology, ETH Zürich, Zürich 8092, Switzerland.
ACS nano
|January 18, 2024
概括
表面交叉连接增强了粘膜环境中的病毒样颗粒 (VLP) 的稳定性. 这提高了VLP的免疫力,而不会影响疫苗的有效性或粘液相互作用.
科学领域:
- 生物技术是生物技术.
- 纳米技术纳米技术
- 疫苗学 疫苗学 疫苗学
背景情况:
- 病毒样颗粒 (VLP) 是生物医学应用的有希望的纳米支架,包括粘膜疫苗和mRNA输送.
- 低脂蛋白易受环境压力因素的影响,如低pH值和粘膜组织中发现的蛋白酶.
- 提高VLP稳定性对于有效的输送和治疗应用至关重要.
研究的目的:
- 提高VLP对粘膜环境压力因素的稳定性和持久性.
- 研究表面交叉连接对VLP结构和机械性能的影响.
- 评估表面交叉链接对粘膜输送和疫苗接种的VLP功能的影响.
主要方法:
- 通过使用同机双功能聚乙烯甘醇 (PEG) 连接器,对VLP表面氨基酸残留进行交叉链接.
- 在低pH条件和高蛋白酶度 (胃液) 中评估VLP的稳定性.
- 使用原子力显微镜 (AFM) 测量VLP的机械性能,并通过小角度X射线散射 (SAXS) 测量结构变化.
- 在小鼠模型中评估VLP粘液转位,上皮积累和体内疫苗疗效.
主要成果:
- 表面交叉链接在低pH值和蛋白酶存在时显著提高了VLP稳定性.
- 交叉连接的VLP表现出增加的刚性和改变的结构尺寸 (直径和外厚度).
- 表面交叉链接在体外没有阻碍VLP粘液转位或上皮细胞积累.
- 在表面交叉链接后,VLP在体内保留了他们的疫苗功能.
结论:
- 使用宏分子的表面交叉连接是一种有效的策略,用于提高粘膜应用的VLP弹性.
- 与非交叉链接的PEGylation相比,这种方法在恶劣的胃环境中改善了VLP生存率.
- 表面交叉链接提供了一种可行的方法来优化VLP,以提高粘膜输送系统的稳定性和有效性.
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