在ex vivo肝脏中直接组织注射后使用CT成像绘制药物分布图:为临床实施提供信息
Robert Morhard1, Michal Mauda-Havakuk1,2, Jose F Delgado1
1Center for Interventional Oncology, Radiology and Imaging Sciences, Clinical Center, National Institutes of Health, Bethesda, MD USA.
CVIR oncology
|December 22, 2025
概括
直接内注射可以改善药物输送. 研究人员发现,虽然对比剂和替代药物具有相关的分布,但它们的不同性质会导致变化. 多焦点注射可能会增强药物局部化.
科学领域:
- 生物医学工程 生物医学工程
- 放射学 放射学是一门学科.
- 药理学 药理学是指药理学的学科.
背景情况:
- 直接内注射比系统注射具有优势,可以将药物的剂量和副作用降到最低.
- 然而,药物从注射部位泄漏可能导致不可预测的分布,可变的疗效和非目标毒性.
研究的目的:
- 为了评估与光白蛋白替代品药物同时注射有的对比剂.
- 估计药物的空间分布,并评估对比剂作为可图像替代品的有用性.
主要方法:
- 活体牛肝注射光白蛋白和 (对比剂) 在不同的体积和速率.
- 通过CT扫描的分布与通过显微镜的光白蛋白分布的比较.
- 测量两个剂的物理性质 (水力动力直径,泽塔潜力).
主要成果:
- 素醇 (2.7 nm,中性电荷) 比光白蛋白 (17.0 nm,负电荷) 更小,电荷也更小.
- 约迪克桑醇的分布体积大约是光白蛋白的7倍,分布体积的高相关性 (R2=0.89).
- 两种药物的分布变异随着注射量增加而增加.
结论:
- 对比剂和替代药物分布是相关的,但由于物理化学性质而有所不同.
- 对比剂可以作为可图的替代品来指导临床前和临床药物开发.
- 多焦点,小体积的间歇性注射似乎改善了注射药物在目标部位的局部化.
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