Zebrafish duox mutations provide a model for human congenital hypothyroidism

Zebrafish duox mutations provide a model for human congenital hypothyroidism
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斑马鱼双核突变为人类先天性甲状腺功能减退症提供了模型

DOI:
10.1101/372003
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发表时间:
2018
期刊:
--
影响因子:
--
通讯作者:
Chopra K
Chopra K
中科院分区:
--
文献类型:
--
作者:
Chopra K

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甲状腺激素生成异常是先天性甲状腺功能减退症的主要原因,先天性甲状腺功能减退症是一种非常普遍但可以治疗的疾病。甲状腺激素(TH)的合成依赖于活性氧(ROS)的形成。在人类中,甲状腺激素合成过程中 ROS 产生的主要来源是 NADPH 氧化酶 DUOX1 和 DUOX2。事实上,DUOX1 和 DUOX2 的突变与先天性甲状腺功能减退症有关。与人类不同,斑马鱼具有 DUOX1 和 DUOX2 的单一直系同源物。在本研究中,我们研究了斑马鱼中与 singleduox 基因的两个无义突变等位基因 sa9892 和 sa13017 相关的表型。从幼虫阶段到成年期,这两个等位基因都产生了容易观察到的表型,让人想起先天性甲状腺功能减退症。通过使用各种方法检查外部和内部表型,我们发现 TH 合成和双氧功能之间存在很强的相关性,从早期幼虫阶段开始,此时 T4 水平在突变体中已经明显缺失。 T4 产量的丧失会导致生长迟缓、色素沉着缺陷、鳍条参差不齐、甲状腺增生/外甲状腺肿和不育。值得注意的是,所有这些与慢性先天性甲状腺功能减退症相关的缺陷都可以通过 T4 治疗来挽救,即使是在鱼已经成年时开始治疗。我们的工作表明,这些斑马鱼duox突变体可能提供一个强大的模型来了解未经治疗和治疗的先天性甲状腺功能减退症的病因,即使是在发育的晚期阶段。本文有与该论文第一作者的相关第一人称采访。
Thyroid dyshormonogenesis is a leading cause of congenital hypothyroidism, a highly prevalent but treatable condition. Thyroid hormone (TH) synthesis is dependent on the formation of reactive oxygen species (ROS). In humans, the primary sources for ROS production during thyroid hormone synthesis are the NADPH oxidases DUOX1 and DUOX2. Indeed, mutations inDUOX1andDUOX2have been linked with congenital hypothyroidism. Unlike humans, zebrafish has a single orthologue forDUOX1andDUOX2. In this study, we investigated the phenotypes associated with two nonsense mutant alleles,sa9892andsa13017, of the singleduoxgene in zebrafish. Both alleles gave rise to readily observable phenotypes reminiscent of congenital hypothyroidism, from the larval stages through to adulthood. By using various methods to examine external and internal phenotypes, we discovered a strong correlation between TH synthesis andduoxfunction, beginning from an early larval stage, when T4levels are already noticeably absent in the mutants. Loss of T4production resulted in growth retardation, pigmentation defects, ragged fins, thyroid hyperplasia/external goiter and infertility. Remarkably, all of these defects associated with chronic congenital hypothyroidism could be rescued with T4treatment, even when initiated when the fish had already reached adulthood. Our work suggests that these zebrafishduoxmutants may provide a powerful model to understand the aetiology of untreated and treated congenital hypothyroidism even in advanced stages of development.This article has an associated First Person interview with the first author of the paper.
DOI: --
发表时间: 2014
期刊:
影响因子: --
作者:
M. Sugawara
通讯作者: M. Sugawara
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DOI: --
发表时间: 1974
期刊: The Journal of experimental zoology
影响因子: --
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期刊: DEVELOPMENT
影响因子: 4.6
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DOI: 10.1210/me.2007-0085
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Johnson, Kenneth R.;Marden, Coleen C.;Donahue, Leah Rae
通讯作者: Donahue, Leah Rae
DOI: --
发表时间: 1989
期刊:
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Y. Hirata;H. Kurokura;S. Kasahara
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