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甲基转移酶3促进甲状腺毛囊生成通过协调细胞分化和极化
Ruoyu Jiang1, Qibo Zhu2, Zhenlei Zhang3
1Department of General Surgery, Tianjin Medical University General Hospital, Tianjin Medical University, Tianjin, China.
甲基转移酶类3 (METTL3) 缺乏会通过破坏甲状腺发育和激素产生,导致先天性甲状腺功能低下症. 这项研究揭示了METTL3.
科学领域:
- 内分泌学和分子生物学
- 表观遗传学和RNA修饰
背景情况:
- 先天性甲状腺功能低下症 (CH) 是一种常见的新生儿内分泌疾病,其原因尚不清楚,通常与甲状腺失调有关.
- 甲基转移酶3 (METTL3) 对于N6-methyladenosine (m6A) 修饰至关重要,对器官发育至关重要,但其在甲状腺形成和CH中的作用尚不清楚.
研究的目的:
- 研究METTL3在先天性甲状腺功能低下症的发展中的作用.
- 为了解甲状腺形成中METTL3的调节机制提供见解.
- 为临床治疗CH提供潜在的治疗点.
主要方法:
- 创建了一个甲状腺细胞特异的Mettl3淘汰赛小鼠模型,用于形态和功能分析.
- 评估甲状腺分化,两极化和激素合成,使用免疫组织化学,免疫光和RT-qPCR.
- 量化了血清甲状腺激素水平,并进行了与甲状腺细胞系的体外研究,使用了lentivirus介导的沉默和救援.
主要成果:
- 甲状腺细胞的Mettl3缺乏导致CH表型,以减少甲状腺激素和体重为特征.
- 缺乏Mettl3的小鼠中的甲状腺毛囊显示异常的融合,扩大的结构,并破坏了极性和模式.
- 失去METTL3导致Pax8表达减少,m6A修饰受损,甲状腺细胞两极分化,分化和激素合成受损.
结论:
- METTL3 通过调节甲状腺细胞的两极分化和分化,对甲状腺毛囊生成和激素分泌至关重要.
- 由于甲状腺发育受损,METTL3缺乏是先天性甲状腺功能低下的潜在原因.
- 在m6中METTL3的作用 一个修改突出了它在甲状腺生物学和CH病原发生的意义.
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