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预测吸入的二氧化纳米颗粒的定量生物分布,使用生理学基础的毒动力学建模方法
Jintao Wang1, Zhangyu Liu1, Bin Wan2,3
1School of Aerospace Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
Toxics
|October 28, 2025
概括
一个新的基于生理学的毒动力学 (PBTK) 模型准确地预测了吸入后老鼠的二氧化纳米粒子 (TiO2-NPs) 分布,有助于评估人类暴露的风险.
科学领域:
- 毒理学 毒理学 毒理学
- 纳米技术纳米技术
- 药理动力学 药理动力学
背景情况:
- 二氧化纳米颗粒 (TiO2-NPs) 的使用越来越多,需要了解它们的生物命运.
- 吸入纳米粒子在体内的行为是复杂的,需要复杂的建模.
- 关于吸收,分布和消除 (ADME) 吸入的TiO2-NPs. 的数据有限.
研究的目的:
- 开发和验证一种基于生理学的毒动力学 (PBTK) 模型,用于大鼠吸入的TiO2-NPs.
- 研究TiO2-NPs在各种器官中的吸收,保留和运输机制.
- 为预测TiO2-NP生物分布和人类暴露风险提供一个计算工具.
主要方法:
- 构建一个PBTK模型,包括详细的呼吸模块和希尔系数方程.
- 校准和验证使用现有的老鼠吸入生物分布数据对TiO2-NPs.
- 灵敏度分析以确定影响TiO2-NP动态的关键参数.
主要成果:
- PBTK模型显示出良好的预测性能,R2值为0.95 (呼吸系统) 和0.88 (次要器官).
- 关键参数,如膜-间歇转移率和组织-血液分布系数,显著影响了TiO2-NP的保留和分布.
- 在老鼠器官中模拟的TiO2-NP度始终在0.5到2倍的测量数据范围内.
结论:
- 开发的PBTK模型准确地预测了老鼠吸入的TiO2-NPs的体内分布.
- 该模型作为一种有价值的计算工具,可以将动物数据推断为人类吸入暴露.
- 这项研究提高了对TiO2-NP毒动力学和纳米材料风险评估的理解.
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