Fetal liver bisphenol A concentrations and biotransformation gene expression reveal variable exposure and altered capacity for metabolism in humans.

Fetal liver bisphenol A concentrations and biotransformation gene expression reveal variable exposure and altered capacity for metabolism in humans.
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DOI:
10.1002/jbt.21459
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发表时间:
2013-02
影响因子:
3.6
通讯作者:
Dolinoy, Dana C.
Dolinoy, Dana C.
中科院分区:
医学4区
文献类型:
--
作者:
Nahar, Muna S.;Liao, Chunyang;Kannan, Kurunthachalam;Dolinoy, Dana C.

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广泛接触内分泌活性化合物双酚A(BPA)在人类中得到了很好的证明。越来越多的文献表明,与不同范围的双酚A接触有关的不良健康后果。在目前的研究中,我们测量了50个妊娠早期和中期的人胎肝样本中游离双酚A和结合双酚A的内剂量,并评估了双酚A代谢特异的生物转化酶的基因表达。游离双酚A和结合双酚A的浓度变化很大,其中游离双酚A的浓度是结合双酚A浓度的三倍。与性别匹配的成人肝脏对照相比,UDP-葡萄糖醛酸基转移酶、磺基转移酶和类固醇硫酸酯酶基因在胎儿组织中的表达降低,而β-葡萄糖醛酸苷酶基因的表达保持不变。这项研究提供了证据,证明在人类怀孕期间有相当大的BPA暴露,并且人类胚胎肝脏中BPA代谢的能力发生了改变。
Widespread exposure to the endocrine active compound, bisphenol A (BPA), is well documented in humans. A growing body of literature suggests adverse health outcomes associated with varying ranges of exposure to BPA. In the current study, we measured the internal dose of free BPA and conjugated BPA and evaluated gene expression of bio-transformation enzymes specific for BPA metabolism in 50 first- and second-trimester human fetal liver samples. Both free BPA and conjugated BPA concentrations varied widely, with free BPA exhibiting three times higher concentrations than conjugated BPA concentrations. As compared to gender-matched adult liver controls, UDP-glucuronyltransferase, sulfotransferase, and steroid sulfatase genes exhibited reduced expression whereas β-glucuronidase mRNA expression remained unchanged in the fetal tissues. This study provides evidence that there is considerable exposure to BPA during human pregnancy and that the capacity for BPA metabolism is altered in the human fetal liver.
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