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Comparative genotoxic potential of 27 polycyclic aromatic hydrocarbons in three human cell lines
Toxicology Letters ( IF 3.5 ) Pub Date : 2020-06-01 , DOI: 10.1016/j.toxlet.2020.03.007
F. Tomasetig , C. Tebby , V. Graillot , F. Zeman , A. Pery , J.P. Cravedi , M. Audebert

Polycyclic Aromatic Hydrocarbons (PAHs) form a family of compounds that are generally found in complex mixtures. PAHs can lead to the development of carcinogenesis. The Toxicity Equivalent Factor (TEF) approach has been suggested for estimating the toxicity of PAHs, however, due to the relative weakness of available data, TEF have not been applied for the risk characterization of PAHs as food contaminants in Europe. The determination of new TEFs for a large number of PAHs could overcome some limitations of the current method and improve cancer risk assessment. The present investigation aimed at deriving new TEFs for PAHs, based on their genotoxic effect measured in vitro and analyzed with mathematical models. For this purpose, we used a genotoxicity assay (γH2AX) with three human cell lines to analyze the genotoxic properties of 27 selected PAHs after 24 h treatment. For 11 compounds, we did not detect any genotoxic potential. For the remaining 16 PAHs, the concentration-response for genotoxic effect was modelled with the Hill equation; equivalency between PAHs at low dose was assessed by applying constraints to the model parameters. We developed for each compound, in each cell line, Genotoxic Equivalent Factor (GEF). Calculated GEF for the tested PAHs were similar in all cell lines and generally higher than the TEF usually used. These new equivalent factors for PAHs should improve cancer risk assessment.

中文翻译:

三种人类细胞系中 27 种多环芳烃的比较遗传毒性潜力

多环芳烃 (PAH) 形成了一个通常存在于复杂混合物中的化合物家族。PAH 可导致致癌作用的发展。已建议使用毒性等效因子 (TEF) 方法来估计 PAH 的毒性,但是,由于可用数据的相对薄弱,TEF 尚未应用于欧洲作为食品污染物的 PAH 的风险表征。测定大量 PAH 的新 TEF 可以克服当前方法的一些局限性并改进癌症风险评估。本研究旨在基于 PAH 的基因毒性效应在体外测量并使用数学模型进行分析,为 PAH 推导出新的 TEF。以此目的,我们使用三种人类细胞系的基因毒性测定 (γH2AX) 来分析 27 种选定的多环芳烃在处理 24 小时后的基因毒性特性。对于 11 种化合物,我们没有检测到任何潜在的遗传毒性。对于剩余的 16 种 PAH,遗传毒性效应的浓度-响应用 Hill 方程建模;通过对模型参数应用约束来评估低剂量多环芳烃之间的等效性。我们为每个细胞系中的每个化合物开发了基因毒性等效因子 (GEF)。所有细胞系中所测多环芳烃的计算 GEF 均相似,并且通常高于通常使用的 TEF。这些新的 PAH 等效因子应该会改进癌症风险评估。遗传毒性效应的浓度-响应用希尔方程建模;通过对模型参数应用约束来评估低剂量多环芳烃之间的等效性。我们为每个细胞系中的每个化合物开发了基因毒性等效因子 (GEF)。所有细胞系中所测多环芳烃的计算 GEF 均相似,并且通常高于通常使用的 TEF。这些新的 PAH 等效因子应该会改进癌症风险评估。遗传毒性效应的浓度-响应用希尔方程建模;通过对模型参数应用约束来评估低剂量多环芳烃之间的等效性。我们为每个细胞系中的每个化合物开发了基因毒性等效因子 (GEF)。所有细胞系中所测多环芳烃的计算 GEF 均相似,并且通常高于通常使用的 TEF。这些新的 PAH 等效因子应该会改进癌症风险评估。
更新日期:2020-06-01
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