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日常饮食缺乏显著风险:重新考虑口服毒性参考值的应用
Michael D Dutton1, Chris Bacigalupo2
1BioProcess Assist (BPA) Ltd. 8579 Appleby Line, Campbellville, Ontario, Canada. L0P 1B0.
Regulatory toxicology and pharmacology : RTP
|February 11, 2026
概括
(Ni) 的毒性参考值可能被低估. 目前的方法错误地认为对照组缺乏,可能误解作为健康风险.
科学领域:
- 环境毒理学环境毒理学
- 风险评估 风险评估
- 营养科学 营养科学
背景情况:
- 毒性参考值 (TRV) 确定了环境标准和风险评估的安全暴露限值.
- 现有的 (Ni) TRV通常依赖于暴露于硫酸六水合物 (NSHH) 的老鼠的口服毒性数据.
- 在TRV推导中的一个关键假设是,对照组获得零,这在事实上是不正确的.
研究的目的:
- 重新评估用于导出 (Ni) 毒性参考值 (TRV) 的方法.
- 为了解决将基于NSHH的剂量转换为"as-nickel"基础的不准确性.
- 为了澄清饮食中和盐暴露风险之间的区别.
主要方法:
- 对现有监管机构对 (Ni) 的TRV进行分析.
- 对TRV开发中使用的毒性数据和剂量抽取方法的审查.
- 推导的TRV与人类估计的正常饮食摄入量进行比较.
主要成果:
- 使用NSHH数据和"as-nickel"基础得出的TRV可能被低估.
- 这些TRV可以低于人类典型的日常摄入量.
- 这导致了对健康风险的错误归因于天然存在的.
结论:
- 当前的 (Ni) TRVs可能通过不考虑对照组的基线来不准确地评估风险.
- 包括基线饮食在内的风险评估实践与已建立的科学观点不一致.
- 区分来自可溶性盐和天然存在的的风险对于准确的人类健康风险评估至关重要.
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