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相关概念视频

Synthesis and Regulation of Thyroid Hormones01:20

Synthesis and Regulation of Thyroid Hormones

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Low blood levels of the thyroid hormones — triiodothyronine (T3) and thyroxine (T4) — signal the hypothalamus to release the thyrotropin-releasing hormone (TRH). TRH then reaches the pituitary gland and stimulates the release of thyroid-stimulating hormone(TSH) into the bloodstream.
Upon reaching the thyroid gland, TSH stimulates the follicular cells' active uptake of iodide ions from the blood. The ions diffuse to the apical surface of the cells and are oxidized to iodine. The...
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相关实验视频

Updated: Jan 9, 2026

Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model
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人类甲状腺微组织试验的实验室间验证.

Chad Deisenroth1, Briana Foley1, Eda Rogers2

  • 1U.S. Environmental Protection Agency, Research Triangle Park, NC, United States of America.

Toxicological sciences : an official journal of the Society of Toxicology
|December 4, 2025
PubMed
概括

一个经过验证的人类甲状腺微组织试验可靠地测量甲状腺激素破坏. 这种新方法方法 (NAM) 减少了对影响内分泌系统的化学物质的动物试验.

关键词:
内分泌毒理学 内分泌毒理学新方法 方法 新方法 方法甲状腺是什么?甲状腺是什么?破坏甲状腺的化学物质验证 验证 验证 验证

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科学领域:

  • 内分泌学 在内分泌学.
  • 毒理学 毒理学 毒理学
  • 在体外 (in vitro) 方法

背景情况:

  • 美国环境保护局 (EPA) 正在探索新的方法 (NAMs) 来选影响甲状腺内分泌系统的化学物质.
  • 验证这些NAM对于监管决策和减少动物试验至关重要.
  • 人类甲状腺微组织测定是一种有前途的体外方法,用于评估甲状腺干扰.

研究的目的:

  • 为了对人类甲状腺微组织试验进行实验室间验证.
  • 评估测试对查甲状腺干扰剂的相关性和可靠性.
  • 为监管应用建立对NAM数据的信任.

主要方法:

  • 研究设计和标准操作程序是在与NICEATM和行业合作伙伴合作确定的.
  • 评估了测试方法转移,培训和实验室内表现.
  • 对参考化学品进行了实验室间测试,并由专家进行独立监测.

主要成果:

  • 甲状腺微组织模型显示可靠的可转移到新的实验室.
  • 在实验室中观察到对甲状腺激素合成的可重复效应.
  • 参考化学品的实验室间测试符合性能标准,显示一致的生物活性.

结论:

  • 经过验证的人类甲状腺微组织试验可靠地测量甲状腺激素合成扰乱.
  • 这种测试支持基于NAM的测试策略,减少对动物试验的依赖.
  • 它解决了对内分泌干扰剂的监管关注的关键作用模式.