Mechanisms of action of the congenital diaphragmatic hernia-inducing teratogen nitrofen.

Mechanisms of action of the congenital diaphragmatic hernia-inducing teratogen nitrofen.
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先天性膈疝致畸剂除草醚的作用机制。

DOI:
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发表时间:
2007
期刊:
American Journal of Physiology - Lung cellular and Molecular Physiology
影响因子:
--
通讯作者:
J. Greer
J. Greer
中科院分区:
--
文献类型:
--
作者:
B. R. Noble;Randal P. Babiuk;Robin D. Clugston;T. Underhill;Hui;R. Kawaguchi;P. Walfish;R. Blomhoff;T. Gundersen;J. Greer

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先天性膈疝(CDH)是一种发育异常,导致显著的死亡率和发病率。潜在的病因尚不清楚。从对致畸物硝芬在啮齿动物模型中诱导CDH的机制的理解中产生见解。在这项研究中,我们使用体外细胞分析结合全动物啮齿动物研究来测试关于硝芬作用机制的假设。第一部分研究了硝芬与类视黄醇信号通路各方面的相互作用,包括摄取蛋白、结合蛋白、受体、转化酶和降解酶。第二部分研究了硝芬与维生素A、C和E的相互作用,以验证硝芬作为抗氧化剂干扰类视黄醛信号的假设。第三,我们进行了一系列实验,研究硝芬和甲状腺信号的相互作用。总的来说,这些数据表明,硝芬影响类维甲酸信号传导的主要方面是通过抑制控制维甲酸合成的限速酶。类视黄醇信号的干扰似乎不涉及硝芬的氧化作用。硝芬诱导的甲状腺激素信号或受体功能的扰动的任何实质性作用不被支持。
Congenital diaphragmatic hernia (CDH) is a developmental anomaly that results in significant mortality and morbidity. The underlying etiology is poorly understood. Insights will arise from an understanding of the mechanisms by which the teratogen nitrofen induces CDH in rodent models. In this study, we use in vitro cell assays in conjunction with whole animal rodent studies to test hypotheses regarding nitrofen's mechanism of action. The first component examined the interaction of nitrofen with various aspects of the retinoid signaling pathway including uptake proteins, binding proteins, receptors, conversion, and degradation enzymes. The second component examined the interactions of nitrofen and vitamins A, C, and E to test the hypothesis that nitrofen was functioning as an antioxidant to interfere with retinoid signaling. Third, we performed a series of experiments examining the interaction of nitrofen and thyroid signaling. Collectively, the data suggest that the primary aspect of retinoid signaling affected by nitrofen is via inhibition of the rate-limiting enzymes controlling retinoic acid synthesis. Retinoid signaling perturbations do not appear to involve oxidative effects of nitrofen. Any substantial roles of nitrofen-induced perturbations of thyroid hormone signaling or receptor function are not supported.
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期刊: Differentiation; research in biological diversity
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