胎児 の 神経 生成 を 促進 する 甲状腺 ホルモン
Federico Salas-Lucia1, Sergio Escamilla1, Amanda Charest2
1Department of Medicine, Section of Adult and Pediatric Endocrinology and Me, University of Chicago, Chicago, United States of America.
JCI insight
|September 4, 2025
まとめ
母親の甲状腺ホルモン (T4) は胎児の脳発達に不可欠です. この研究はT4が神経細胞の分化と分裂を支えていることを示しています
科学分野:
- 神経科学
- 発達生物学
- 内分泌学
背景:
- 妊娠初期における母親の低チロキシン (T4) レベルは,子孫の神経発達の結果と関連しています.
- 胎児の発達中の母親のT4レベルに対して神経細胞が脆弱である正確なメカニズムは完全に理解されていません.
研究 の 目的:
- ヒトの神経前駆体細胞の分化と神経生成における甲状腺ホルモンの役割を調査する.
- 発達中の脳における 甲状腺ホルモンの作用に関与する 分子経路を解明する
主な方法:
- MCT8トランスポーターの機能喪失変異を有する患者の誘発性多能幹細胞 (iPSCs) を利用した.
- MCT8欠乏性脳オーガノイドとヒト神経前駆細胞 (NPC) の単細胞,空間,および大量トランスクリプトミクスを採用した.
- デオディナーゼ酵素と 甲状腺ホルモン核受容体の発現を分析した
主要な成果:
- 甲状腺ホルモンは,ヒトの神経前駆体細胞の背面経路の進行を促進する転写変化を誘発する.
- 神経細胞へのNPCの分化には最適な甲状腺ホルモンのレベルが必要である.
- 2型デオディナーゼと核受容体による細胞内T4活性化は,NPC分裂と細胞サイクル進行を調節する.
結論:
- 胎児のニューロゲネシスと適切な脳の発達には必要不可欠です.
- MCT8トランスポーターと細胞内T4の活性化は,神経細胞の甲状腺ホルモンシグナル伝達に不可欠です.
- 妊娠中の母親の甲状腺ホルモンのレベルが 子孫の神経発達に 重要であることを強調しています
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