开发和应用共识的化模型,以推进高通量毒理学预测
Sean P Collins1, Brandon Mailloux1, Sunil Kulkarni1
1Existing Substances Risk Assessment Bureau, Healthy Environments and Consumer Safety Branch, Health Canada, Ottawa, ON, Canada.
Frontiers in pharmacology
|February 9, 2024
概括
计算毒理学使用in silico (Q) SAR模型进行化学选. 一个新的共识建模策略结合了多个模型的预测,提高了九个毒理学终点的准确性和化学空间覆盖率.
科学领域:
- 计算毒理学计算毒理学
- 在模型建模.
- 结构与活动的关系.
背景情况:
- 许多in silico (定量) 结构-活性关系 ([Q]SAR) 模型存在,用于预测毒理学终点.
- 模型之间的差异源于训练集,算法和方法的变化,导致高通量选中的数据冲突.
- 需要战略来协调不同的预测,并扩大化学空间覆盖范围.
研究的目的:
- 开发一个共识建模策略,将多个in silico (Q) SAR模型的预测结合起来.
- 为九个毒理学终点创建共识模型:雌激素受体 (ER) 和雄激素受体 (AR) 相互作用 (结合,激动,对抗) 和基因毒性 (细菌突变,体外染色体异常,体内微核).
- 为了确定最佳的共识模型,使用帕雷托阵线进行多目标决策.
主要方法:
- 通过整合各种现有 (Q) SAR模型的预测,开发了共识模型.
- 采用不同的权重方案来结合模型预测.
- 利用帕雷托前线分析来确定最佳的共识模型,同时优化每个终点的多个标准.
主要成果:
- 与单个模型相比,共识模型显示出更好的预测能力和更广泛的化学空间覆盖范围.
- 帕雷托前线为每一个九个毒理学终点确定了最佳共识模型的集合.
- 分析揭示了共识模型及其组成组件模型的性能之间的趋势.
结论:
- 开发的共识建模方法是灵活的,可以适应各种毒理学终点.
- 这些共识模型增强了化学品优先级,并支持在风险评估中转向非动物试验方法.
- 该战略有效地解决了数据冲突,并扩大了计算毒理学框架中的适用性.
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