在静脉形缺陷中依赖尺寸的纳米粒子积累
Kathleen Cullion1,2, Claire A Ostertag-Hill1,3, Weimin Tang1,2
1Laboratory for Biomaterials and Drug Delivery, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts.
Journal of vascular anomalies
|December 30, 2024
概括
较小的纳米粒子 (NP) 通过增强的透和保留 (EPR) 效应在静脉形 (VMs) 中呈现增强的积累. 这项研究确定了VM药物输送的最佳NP大小,提高了治疗疗效和降低毒性.
科学领域:
- 生物医学工程 生物医学工程
- 纳米技术纳米技术
- 血管生物学 血管生物学
背景情况:
- 目前用于静脉形 (VMs) 的治疗包括具有毒性副作用的全身药物或具有高风险的复杂程序.
- 纳米颗粒 (NP) 提供了一种潜在的策略,可以改善向VMs的药物输送,通过增强透和保留 (EPR) 效应提高疗效并减少全身毒性.
- 在VM中NP大小对EPR的影响在很大程度上仍未被探索.
研究的目的:
- 通过增强透和保留 (EPR) 效应,研究纳米粒子大小对静脉形 (VMs) 内积累的影响.
- 确定在虚拟机中被动积累的最佳纳米粒子大小,为未来的治疗策略提供信息.
主要方法:
- 通过使用含有常见VM相关突变的特定内皮细胞建立了皮下VMs的小鼠模型.
- 多种尺寸 (20,50,80,180 nm) 的空心纳米粒子 (NP) 被涂上聚乙烯糖醇 (PEG) 并与光体结合,被系统地施用.
- 在VM和器官内NP积累量化使用共聚焦显微镜和体内成像系统.
主要成果:
- PEGylated空心二氧化NP表现出水力动力直径在31.6nm到232nm之间.
- 与较大的NP相比,较小的NP在虚拟机中显示出明显更大的积累.
- 具体来说,20纳米NP的积累比50纳米NP的积累大2倍,比80纳米以上NP的积累大6倍 (P < .01).
结论:
- 这项研究确定20纳米是通过EPR效应在静脉形中纳米粒子积累的最佳尺寸.
- 这些发现为开发尺寸优化纳米粒子用于向VM治疗提供了关键的基础.
- 优化NP大小可以提高治疗疗效,并最大限度地减少VM管理中的非目标毒性.
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