Pathophysiological relevance of proteomics investigations of drug-induced hepatotoxicity in HepG2 cells.

Pathophysiological relevance of proteomics investigations of drug-induced hepatotoxicity in HepG2 cells.
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HepG2 细胞药物诱导肝毒性的蛋白质组学研究的病理生理学相关性。

DOI:
10.1093/toxsci/kfr053
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发表时间:
2011
期刊:
Toxicological sciences : an official journal of the Society of Toxicology
影响因子:
--
通讯作者:
Ramachandran,Anup
Ramachandran,Anup
中科院分区:
--
文献类型:
--
作者:
Jaeschke,Hartmut;McGill,MitchellR;Ramachandran,Anup

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在最近的研究中,我们研究了暴露于三种充分表征的模型化合物(对乙酰氨基酚[APAP]、胺碘酮和环孢菌素A)的HepG 2细胞中的蛋白质表达变化(货车Summeren等人,2011年)。在致编辑的一封信中,Jaeschke等人对我们的研究发表了评论,特别是关于HepG 2细胞研究肝毒性的适用性,从而将他们的评论限制在APAP诱导的效应上。我们很高兴我们的研究开启了关于HepG 2细胞和组学技术在毒性筛选中的应用的讨论。我们研究计划的主要目的是开发体外方法或短期体内方法来测试化合物的有机毒性,作为长期毒性的慢性啮齿动物毒性试验的替代方法。为此,我们考虑了几种体外模型,即HepG 2细胞(Staal等人,2006;货车Summeren等人,2011)、HepaRG细胞(Jennen等人,2010),以及小鼠、大鼠和人原代肝细胞(Kienhuis等人,2009 a; Mathijs等人,2009年)。理想情况下,体外模型应尽可能良好地代表体内条件;在预测毒理学中,强调细胞模型应具有代谢能力,从而表达相关的I相和II相酶(尽管公平地注意到,最终的毒性结果由更广泛的分子机制决定)。然而,代谢能力意味着酶应该以一定水平表达,以便它们可以激活异生素化合物;它不一定意味着酶活性应该与体内相似。与Jaeschke等人的声明相反,已经显示HepG 2细胞能够代谢异生化合物,导致毒性作用,包括遗传毒性氧化应激和线粒体功能障碍(休伊特和休伊特,2004; Knasmuller等,2004;奥布莱恩和哈斯金斯,2007; Schoonen等人,2009年)。然而,不可否认的是,HepG 2细胞已经失去了一些肝脏特异性功能
In a recent study, we investigated the protein expression changes in HepG2 cells exposed to three well-characterized model compounds (acetaminophen [APAP], amiodarone, and cyclosporin A)(Van Summeren et al., 2011). In a Letter to the Editor, Jaeschke et al. gave their comments on our study, especially with respect to the suitability of HepG2 cells to study liver toxicity, thereby limiting their comments to effects induced by APAP. We are pleased that our research opens the discussion on the use of HepG2 cells and omics technologies in toxicity screening.The major aim of our research program is to develop in vitro methods or short-term in vivo methods for testing the organotoxic properties of compounds as an alternative to the chronic rodent toxicity assays for long-term toxicity. For that, we consider several in vitro models, namely, HepG2 cells (Staal et al., 2006; Van Summeren et al., 2011), HepaRG cells (Jennen et al., 2010), as well as mouse, rat, and human primary hepatocytes (Kienhuis et al., 2009a; Mathijs et al., 2009). Ideally, in vitro models should represent in vivo conditions as good as possible; in predictive toxicology, it is emphasized that cellular models should be metabolic competent, thus express relevant phase I and II enzymes (although it is fair to note that the eventual toxic outcome is determined by a much wider range of molecular mechanisms involved). Metabolic competent, however, means that the enzymes should be expressed at a certain level so that they can activate xenobiotic compounds; it does not necessarily imply that enzymatic activities should be similar to in vivo. In contrast to the statement of Jaeschke et al., it has been shown that HepG2 cells are able to metabolize xenobiotic compounds leading to toxic effects, including genotoxicity oxidative stress and mitochondrial dysfunction (Hewitt and Hewitt, 2004; Knasmuller et al., 2004; O’Brien and Haskins, 2007; Schoonen et al., 2009). However, it is undeniable that the HepG2 cells have lost some of the liver-specific functions
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