在模型中使用化学混合物毒性的查水平估计:环境事件的JP-5案例研究
Chao Ji1, Moiz Mumtaz2, Chris Reh3
1Office of Innovation and Analytics, Agency for Toxic Substances and Disease Registry (ATSDR), Centers for Disease Control and Prevention (CDC), Atlanta, Georgia 30341, United States.
Environmental science & technology
|February 5, 2026
概括
这项研究表明,在缺少数据的情况下,in silico工具可以估计饮用水中JP-5等化学混合物的毒性. 这些计算方法提供了有价值的查级健康指导值 (HGV).
科学领域:
- 环境毒理学环境毒理学
- 计算化学的计算化学
- 风险评估 风险评估
背景情况:
- 环境事件可以释放复杂的化学混合物,通过污染的饮用水带来风险.
- 评估混合物毒性至关重要,但往往由于缺乏实验数据而受到阻碍.
- JP-5燃料泄漏例证了需要预测性毒理学方法的需要.
研究的目的:
- 评估使用in silico工具来估计JP-5.的口服毒性起点 (PODs) 的可行性.
- 评估定量结构-活性关系 (QSAR) 模型,毒理关注门 (TTC) 和横读方法的适用性.
- 为了获得JP-5暴露的基于的健康指导值 (HGVs).
主要方法:
- 利用公开可用的在的工具 (QSAR,TTC,阅读交叉) 来估计JP-5的POD.
- 对QSAR模型 (OPERA,ToxTree,VEGA) 进行了适用性领域评估.
- 应用剂量计调整和不确定性因子,将大鼠POD推断为HGV;使用度添加用于混合物毒性.
主要成果:
- QSAR模型展示了广泛的覆盖范围,OPERA和ToxTree是完全包容的.
- 维加模型显示了中等至高的信心,除了某些添加剂.
- 在制HGV中,通常与现有的指导值保持一致,TTC估计是保守的.
结论:
- 在模型是有效的填补化学混合物的毒理学数据缺口.
- 这种方法在经验数据有限的情况下,为评估暴露风险提供了有价值的查层面的见解.
- 该研究成功地证明了计算工具在环境健康风险评估中的实用性.
相关概念视频
03:27Mixtures of Acids
21.9K
The pH of a solution containing an acid can be determined using its acid dissociation constant and its initial concentration. If a solution contains two different acids, then its pH can be determined using one of several methods depending upon the relative strength of the acids and their dissociation constants.
A Mixture of a Strong Acid and a Weak Acid
In a mixture of a strong acid and a weak acid, the strong acid dissociates completely and becomes a source of almost all the hydronium ions...
A Mixture of a Strong Acid and a Weak Acid
In a mixture of a strong acid and a weak acid, the strong acid dissociates completely and becomes a source of almost all the hydronium ions...
21.9K
01:19Mixtures of Acids
1.1K
The pH of a solution containing an acid can be determined using its acid dissociation constant and initial concentration. If a solution contains two different acids, then its pH can be determined using one of several methods depending on the relative strength of the acids and their dissociation constants.
In a strong and weak acid mixture, the strong acid dissociates completely and becomes a source of almost all the hydronium ions present in the solution. In contrast, the weak acid shows...
In a strong and weak acid mixture, the strong acid dissociates completely and becomes a source of almost all the hydronium ions present in the solution. In contrast, the weak acid shows...
1.1K
01:08Prevalence and Incidence
1.9K
In statistical epidemiology and health sciences, two essential metrics—prevalence and incidence—are fundamental for understanding disease dynamics within a population. These measures enable public health officials, epidemiologists, and researchers to assess the burden of diseases, allocate resources effectively, and design impactful public health policies and interventions.
Prevalence indicates the proportion of individuals in a population who have a specific disease or health...
Prevalence indicates the proportion of individuals in a population who have a specific disease or health...
1.9K
02:52Chemical Formulas
61.4K
A chemical formula presents information about the proportions of atoms constituting a particular chemical compound or molecule, mainly using symbols of elements and numbers. At times other symbols, such as dashes, parentheses, brackets, commas, plus, and minus signs, are also used. A chemical formula can be one of three types – molecular, empirical, and structural.
61.4K
01:045-Number Summary
5.7K
In a dataset, the 5-number summary includes the minimum data value, the data value of the first quartile, the median data value or data value of the second quartile, the data value of the third quartile, and the maximum data value. These 5 data values can be visualized as a box and whisker plot.
In a box plot, the minimum and maximum data values represent the lower and upper whiskers in the graph, and the median is designated as the center of the box in the chart. The first quartile and third...
In a box plot, the minimum and maximum data values represent the lower and upper whiskers in the graph, and the median is designated as the center of the box in the chart. The first quartile and third...
5.7K
02:37Experimental Determination of Chemical Formula
47.4K
The elemental makeup of a compound defines its chemical identity, and chemical formulas are the most concise way of representing this elemental makeup. When a compound’s formula is unknown, measuring the mass of its constituent elements is often the first step in determining the formula experimentally.
47.4K