基于生物监测的美国人口对甲状腺暴露的风险评估:高通量和生理基础动态模型的应用
Nan-Hung Hsieh1, Eric S C Kwok1
1Human Exposure & Health Effects Modeling Section, Human Health Assessment Branch, Department of Pesticide Regulation, California Environmental Protection Agency, Sacramento, CA 95814, USA.
Toxics
|March 26, 2025
概括
幼儿显示出更高的甲状腺暴露,但风险仍然可以接受. 先进的模型显示,内部剂量比外部暴露估计更好地评估神经毒性风险.
科学领域:
- 环境健康 环境健康
- 毒理学 毒理学 毒理学
- 生物监测 生物监测
背景情况:
- 甲状腺杀虫剂在美国农业和家庭中广泛使用.
- 评估人类暴露和相关的健康风险至关重要.
研究的目的:
- 用生物监测数据评估不同年龄组的甲状腺暴露风险.
- 为了比较基于外部与内部风险的风险评估方法.
主要方法:
- 从NHANES数据中分析了尿液中的甲状腺代谢物.
- 采用高通量和生理基动力学 (PBK) 模型的反向剂量测量.
- 针对神经毒性风险计算的基准剂量 (BMD) 值和暴露边际 (MOE).
主要成果:
- 与其他年龄组相比,幼儿表现出较高的甲甲酸代谢物度.
- 所有评估的风险值都表明了急性神经毒性影响的可接受水平.
- 基于内部剂量的MOE高于基于外部剂量的MOE,这表明传统方法的估计过高.
结论:
- 结合高吞吐量和PBK模型,可以更好地了解甲状腺体健康风险.
- 这种综合方法对暴露跟踪和健康风险评估有价值.
- 美国目前的甲状腺暴露水平并不构成不可接受的急性神经毒性风险.
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