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相关概念视频

Synthesis and Regulation of Thyroid Hormones01:20

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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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Functions of Thyroid Hormones01:18

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The thyroid hormone (TH) plays a pivotal role in the intricate orchestration of physiological processes, exerting profound effects on development, metabolism, and homeostasis throughout different life stages.
TH is indispensable for the normal development and maturation of the skeletal, muscular, and nervous systems during fetal and childhood growth. It facilitates bone mineral turnover and regulates protein synthesis in developing tissues, contributing significantly to overall growth and...
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The thyroid gland is a small, butterfly-shaped gland located in the neck and covers the anterior surface of the trachea. The gland has two lateral lobes connected by a thin tissue mass called the isthmus. Internally, each lobe comprises many small spherical structures known as thyroid follicles, surrounded by a network of blood vessels.
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All radioactive nuclides emit high-energy particles or electromagnetic waves. When this radiation encounters living cells, it can cause heating, break chemical bonds, or ionize molecules. The most serious biological damage results when these radioactive emissions fragment or ionize molecules. For example, α and β particles emitted from nuclear decay reactions possess much higher energies than ordinary chemical bond energies. When these particles strike and penetrate matter, they...
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Hormones intricately bind to receptors on the surface or within target cells, initiating a cascade of cellular responses.
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相关实验视频

Updated: Feb 25, 2026

Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model
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辐射诱导的干扰素I反应会损害甲状腺器官功能.

Rufina Maturi1, Davide Cinat2, Anne L Jellema-de Bruin2

  • 1Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, Naples, Italy; Department of Biomedical Sciences, University Medical Center Groningen, University of Groningen, Groningen 9713 GZ, the Netherlands.

Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology
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概括

放射治疗可能会损害甲状腺,导致炎症和细胞死亡. 干扰素-β (IFN-β) 信号传递起着双重作用,保护细胞但阻碍再生,影响放射治疗后的甲状腺功能.

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科学领域:

  • 分子生物学分子生物学
  • 在瘤学瘤学.
  • 内分泌学 在内分泌学.

背景情况:

  • 放射治疗是癌症治疗的基石,但它可能会对周围的健康组织造成重大损害,包括甲状腺.
  • 甲状腺功能障碍,如甲状腺功能低下和二次恶性瘤,是接受放射治疗的头癌患者的常见并发症.
  • 辐射诱导的甲状腺损伤背后的精确分子机制尚不清楚.

研究的目的:

  • 为了研究暴露于玛辐射后甲状腺器官中发生的分子变化.
  • 阐明特定分子通路的作用,例如干扰素-β (IFN-β) 信号传递,在辐射诱导的甲状腺变化中.

主要方法:

  • 利用散装RNA测序来分析甲状腺器官辐射后的转录组变化.
  • 采用定量PCR (qPCR),西部斑点,免疫光和caspase 3/7活性试验进行验证和进一步探索.
  • 评估有机体形成效率,以评估对干细胞原始细胞潜力的影响.

主要成果:

  • 鉴定了干扰素-β (IFN-β) 信号作为甲状腺组织中辐射诱导炎症的关键媒介.
  • 确定内在的亡途径是辐射诱导的甲状腺细胞死亡的主要机制.
  • 观察到,IFN-β能保护甲状腺细胞灭亡,但同时也会降低甲状腺干细胞的再生能力.

结论:

  • 干扰素-β (IFN-β) 信号在照射后对甲状腺细胞表现出双重作用,促进生存,同时损害再生潜力.
  • 这些发现为放射治疗后甲状腺损伤的分子基础提供了新的见解,这对治疗副作用的管理有意义.