调整DLVO相互作用以细胞类型依赖的方式改变聚合物介导的pDNA传递
Ram Prasad Sekar1, Jessica L Lawson2, Caleb McGrath3
1Chemical and Biological Engineering, Colorado School of Mines, Golden, Colorado 80401, United States.
Langmuir : the ACS journal of surfaces and colloids
|July 4, 2025
概括
研究人员使用合体科学调整了多化物-等离子体DNA复合体 (多复合体) 大小. 不同类型的细胞,包括脏和视网膜细胞,对多重体大小表现出明显的偏好,影响了基因传递效率和毒性.
科学领域:
- 体科学是一种体科学.
- 生物材料科学是生物材料的科学.
- 基因输送 基因输送 基因输送
背景情况:
- 聚合物对于结合,保护和传递像等离子体DNA (pDNA) 这样的核酸至关重要.
- 聚化-pDNA复合体 (多重复合体) 的大小显著影响基因表达,细胞活力和细胞吸收.
- 在基因传递研究中,将多复合体大小与多聚化合物组成脱而出一直是个挑战.
研究的目的:
- 系统地绘制各种细胞类型的多复合体的尺寸偏好.
- 应用合体科学原理,以创建不同大小的组成相等的多重复合体.
- 研究多重复体大小,pDNA凝聚,细胞内化和基因传递结果之间的关系.
主要方法:
- 通过控制交叉复合体相互作用,产生具有从40到827 nm的水力动力半径的多复合体.
- 使用德贾古因-兰多-维维-奥弗比克 (DLVO) 分析来指导控制聚合的pH和离子强度选择.
- 通过在特定时间点的pH值变化来控制多重复合聚的动力控制,以阻止大小.
- 使用静态光散射量化pDNA加载和评估细胞,视网膜细胞和巨细胞中的转基因表达.
主要成果:
- 通过控制组合,在广泛的尺寸范围 (40-827 nm) 上成功生成了多重复合体.
- 观察到较宽松的pDNA包装在较大的多复合体中 (增加水力动力体积).
- 证明了细胞类型特定的多重体尺寸偏好,细胞偏好85-136nm,视网膜细胞耐受85-349nm.
- 确定了依赖大小的细胞内化作为限制pDNA传递效率的关键因素.
- 表明多重体尺寸调整可以平衡毒性和转染效率.
结论:
- 体科学原理允许精确控制多复合体大小,独立于多化物组成.
- 多复合体大小是基因传递效率和毒性的关键决定因素,在细胞类型之间存在显著差异.
- 优化多重体大小提供了一种策略,以增强聚合物介导的pDNA传递和克服细胞障碍.
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