Sudan III dye strongly induces CYP1A1 mRNA expression in HepG2 cells

Sudan III dye strongly induces CYP1A1 mRNA expression in HepG2 cells
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苏丹 III 染料强烈诱导 HepG2 细胞中 CYP1A1 mRNA 表达

DOI:
10.1002/jbt.20408
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发表时间:
2012
影响因子:
3.6
通讯作者:
大野円実
大野円実
中科院分区:
医学4区
文献类型:
--
作者:
M.Sato;T.Suzuki;K.Misawa;大野円実

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苏丹红染料对芳香烃受体(AHR)具有高亲和力,并通过未知的机制有效地诱导其靶基因,如细胞色素P450(CYP 1A 1)。我们研究了在HepG 2细胞中苏丹染料与AHR结合后细胞中发生的详细事件。10 µM苏丹红III处理导致AHR快速易位至细胞核,并在16和24 h后使人CYP 1A 1 mRNA的表达水平增加约20倍。反式激活是由于位于CYP 1A 1的-1137至+59 bp的区域的激活,特别是该区域中存在的四个异生素反应元件(XRE)。AHR和Ah受体核转运蛋白在凝胶迁移试验中与XRE序列相互作用,使用苏丹III处理的HepG 2细胞的核提取物。此外,我们认为,组成型雄烷受体可以修改CYP 1A 1的苏丹III反式激活。© 2012 Wiley Periodicals,Inc. J Biochem Mol Toxicol 26:16-22 2012;在wileyonlinelibrary.com在线查看这篇文章。DOI 10.1002/jbt.20408
Sudan dyes possess a high affinity to the aryl hydrocarbon receptor (AHR) and potently induce its target genes, such as cytochrome P450 (CYP) 1A1, through unknown mechanisms. We investigated a detailed event occurring in cells after binding of Sudan dye to AHR in HepG2 cells. Treatment with 10 µM Sudan III caused rapid translocation of AHR into the nucleus and increased expression levels of human CYP1A1 mRNA by approximately 20‐fold after 16 and 24 h. The transactivation was due to the activation of a region located at −1137 to +59 bp from CYP1A1, in particular, four xenobiotic responsive elements (XREs) existing in the region. AHR and the Ah receptor nuclear translocator interacted with XRE sequences in a gel shift assay using nuclear extract from Sudan III‐‐treated HepG2 cells. Moreover, we suggest that constitutive androstane receptor could modify CYP1A1 transactivation by Sudan III. © 2012 Wiley Periodicals, Inc. J Biochem Mol Toxicol 26:16–22 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/jbt.20408
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