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Comparison of the potential mechanisms for hepatotoxicity of p-dialkoxy chlorobenzenes in rat primary hepatocytes for read-across.
Regulatory Toxicology and Pharmacology ( IF 3.0 ) Pub Date : 2020-02-19 , DOI: 10.1016/j.yrtph.2020.104617
Shota Nakagawa 1 , Maiko Okamoto 1 , Yuko Nukada 1 , Osamu Morita 1
Affiliation  

Read-across based on only structural similarity is considered to have a risk of error in chemical risk assessment. Under these circumstances, considering biological similarity based on adverse outcome pathways using in vitro omics technologies is expected to enhance the accuracy and robustness of conclusions in read-across. However, due to a lack of practical case studies, key considerations and use of these technologies for data gap filling are not well discussed. Here we extracted and compared the potential mechanisms for hepatotoxicity for structural analogs of p-dialkoxy chlorobenzenes including 1,4-dichloro-2,5-dimethoxybenzene (DDMB), 2,5-dichloro-1,4-diethoxybenzene (DDEB), 2-chloro-1,4-dimethoxybenzene (CDMB), and 1-chloro-2,5-diethoxybenzene (CDEB) using in vitro omics technologies for read-across. To reveal the potential mechanisms for hepatotoxicity, we conducted microarray analysis with rat primary hepatocytes. The results showed that three (DDMB, DDEB, CDEB) of the four chemicals affected similar biological pathways such as peroxisome proliferation, oxidative stress, and mitochondrial dysfunction. Furthermore, these biological pathways are consistent with in vivo hepatotoxicity in the source chemical, DDMB. In contrast, CDMB did not affect a specific toxicological pathway. Taken together, these data show the potential mechanisms for hepatotoxicity for three chemicals (DDMB, DDEB, CDEB) and provide novel insights into grouping chemicals using in vitro toxicogenomics for read-across.

中文翻译:

对对-二烷氧基氯苯在大鼠原代肝细胞中进行交叉读取的潜在肝毒性机制的比较。

仅基于结构相似性的跨读被认为具有化学风险评估中的错误风险。在这种情况下,使用体外组学技术考虑基于不良结果途径的生物学相似性有望提高跨读结论的准确性和稳健性。但是,由于缺乏实际的案例研究,因此并未对这些技术的主要考虑因素以及如何使用这些技术来填补数据缺口进行很好的讨论。在这里,我们提取并比较了对二烷氧基氯苯的结构类似物,包括1,4-二氯-2,5-二甲氧基苯(DDMB),2,5-二氯-1,4-二乙氧基苯(DDEB),2的潜在肝毒性机理。 -氯-1,4-二甲氧基苯(CDMB)和1-氯-2,5-二乙氧基苯(CDEB),使用体外组学技术进行读取。为了揭示肝毒性的潜在机制,我们用大鼠原代肝细胞进行了微阵列分析。结果表明,四种化学物质中的三种(DDMB,DDEB,CDEB)影响类似的生物途径,如过氧化物酶体增殖,氧化应激和线粒体功能障碍。此外,这些生物学途径与来源化学物质DDMB中的体内肝毒性一致。相反,CDMB不会影响特定的毒理学途径。综上所述,这些数据显示了三种化学物质(DDMB,DDEB,CDEB)肝毒性的潜在机制,并提供了使用体外毒理基因组进行交叉阅读对化学物质进行分组的新见解。四种化学物质的CDEB)影响了类似的生物途径,例如过氧化物酶体增殖,氧化应激和线粒体功能障碍。此外,这些生物学途径与来源化学物质DDMB中的体内肝毒性一致。相反,CDMB不会影响特定的毒理学途径。综上所述,这些数据显示了三种化学物质(DDMB,DDEB,CDEB)肝毒性的潜在机制,并提供了使用体外毒理基因组进行交叉阅读对化学物质进行分组的新见解。四种化学物质的CDEB)影响了类似的生物途径,例如过氧化物酶体增殖,氧化应激和线粒体功能障碍。此外,这些生物学途径与来源化学物质DDMB中的体内肝毒性一致。相反,CDMB不会影响特定的毒理学途径。综上所述,这些数据显示了三种化学物质(DDMB,DDEB,CDEB)肝毒性的潜在机制,并提供了使用体外毒理基因组进行交叉阅读对化学物质进行分组的新见解。
更新日期:2020-02-20
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