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肺部毒性物质风险评估的新方法:使用二二甲基甲基化进行初步研究
Jun Woo Kim1, Yu Bin Han2, Kyu Hyuck Chung3
1Inhalation Toxicology Center for Airborne Risk Factors, Korea Institute of Toxicology, Jeongeup, 56212, Republic of Korea.
Environmental science and pollution research international
|September 12, 2024
概括
这项研究引入了一种新的吸入毒性风险评估,使用计算机模型和细胞测试对二甲基甲基化物 (DDAC) 的测试. 研究结果表明,在吸入DDAC时应谨慎使用,并强调了动物试验的替代方案.
科学领域:
- 毒理学 毒理学 毒理学
- 吸入暴露 吸入暴露
- 风险评估 风险评估
背景情况:
- 目前的风险评估很大程度上依赖于动物数据和不确定性因素.
- 越来越需要替代性毒性测试方法来减少动物使用.
- 试管体和体方法提供了有前途的替代方案.
研究的目的:
- 开发和验证一种新的吸入毒性风险评估方法.
- 整合in silico和in vitro方法来评估二甲基二甲基化物 (DDAC) 暴露.
- 为了确定人类吸入DDAC的起点 (POD) 和暴露率 (MOE).
主要方法:
- 暴露的人类初级膜上皮细胞到气溶DDAC用于细胞毒性评估.
- 使用不良结果途径 (AOP) 进行了转录组分析和生物途径调查,以确定POD.
- 使用多路径颗粒剂量计 (MPPD) 模型来模拟人类膜DDAC暴露.
- 使用基准剂量工具计算POD,并比较in silico和in vitro结果.
主要成果:
- 对于AOP 452关键事件的POD在19.0到23.89 ng/cm2之间.
- 人类DDAC在膜区域的估计暴露是0.164 ng/cm2/day.
- 暴露率 (MOE) 范围在121至145之间,表明需要谨慎.
结论:
- 拟议的集成in silico和in vitro方法为传统的基于动物的毒性测试提供了可行的替代方案.
- 研究结果表明,与DDAC吸入暴露相关的潜在风险.
- 这种方法支持人类风险评估,通过比较估计的暴露与体外数据,使用人类同等度概念.
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