循环节律调节血流对基于纳米颗粒的向药物输送在虚拟In Vivo动脉几何学的影响
Shoaib A Goraya1, Shengzhe Ding2, Mariam K Arif3
1Department of Civil and Environmental Engineering, University of Illinois Urbana-Champaign.
bioRxiv : the preprint server for biology
|June 19, 2024
概括
这项研究介绍了一种利用纳米粒子进行向药物递送的计算模型,通过考虑血液流动动态和昼夜节律来优化药物度,以提高疗效和减少副作用.
科学领域:
- 生物医学工程 生物医学工程
- 计算流体动力学的流体动力学.
- 纳米技术 纳米技术
背景情况:
- 使用纳米载体的向药物递送旨在提高治疗疗效并最大限度地减少副作用.
- 血流动力学受到昼夜节律的影响,影响药物分发和输送.
- 现有的模型往往缺乏流体动力学,纳米粒子行为和生物因素的详细整合.
研究的目的:
- 开发和验证一种先进的计算流体动力学模型,用于模拟药物运输和纳米颗粒在血管中的粘附.
- 调查血管几何和昼夜节律对向药物输送的影响.
- 为优化药物输送策略和减少体内实验提供一个虚拟平台.
主要方法:
- 将粘性不压缩的剪切速率流体模型与向-扩散方程结合起来,以模拟药物度梯度.
- 结合了经过实验校准的纳米颗粒-内皮细胞粘附模型与罗宾边界条件.
- 利用基于机械的分散,内皮表面粗度和泰勒-阿里斯模型来提高模拟的准确性.
- 对实验数据进行计算模型的验证,并将其应用于基于MRI的虚拟体内动脉模型.
主要成果:
- 模拟准确地预测了药物度梯度和目标地点的积累.
- 容器的几何形状,特别是曲和分叉的区域,显著影响纳米粒子的粘附和保留.
- 将药物管理与昼夜节律和睡眠-清醒周期对齐,可以提高药物递送效率.
- 该模型成功地模拟了复杂的体内动脉几何结构中的药物运输和粘附.
结论:
- 开发的计算模型提供了一个强大的虚拟平台,用于优化基于纳米粒子的向药物输送.
- 了解和利用昼夜节律调节的血流可以显著改善治疗结果.
- 这种方法最大限度地减少了对体内广泛实验的需求,加速了药物开发和个性化医疗.
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