Cl-PFESAは,ヒトの甲状腺細胞における甲状腺ホルモン分泌を妨害し,ヨウ素の併用曝露による非単調な効果をもたらす
Mengying Teng1, Jianhui Zhuang1, Lili Yang1
1Center for Water and Health, National Health Commission Key Laboratory of Health Technology Assessment, Key Laboratory of the Public Health Safety, Ministry of Education, Department of Environmental Health, School of Public Health, Fudan University Shanghai 200032, China.
Toxicology
|February 21, 2026
まとめ
塩素化されたポリフルオラルキルエーテル硫酸 (Cl-PFESAs) は,動物研究とは異なり,ヒト細胞における甲状腺ホルモン合成を増加させます. この効果はPAX8遺伝子によって媒介され,ヨウ素濃度によって影響を受け,潜在的な健康リスクをもたらす.
科学分野:
- 環境毒理学 環境毒理学
- エンドクリノロジー エンドクリノロジー
- 分子生物学は分子生物学である.
背景:
- 塩素化されたポリフルオロアルキルエーテル硫酸 (Cl-PFESAs) は,パーフルオオクタン硫酸の代替品として使用される新興の環境汚染物質です.
- Cl-PFESAsは甲状腺障害物質の疑いがあるが,ヒトの甲状腺ホルモン合成とメカニズムに対するその影響は不明である.
研究 の 目的:
- ヒト甲状腺ホルモン (TH) 合成に対するCl-PFESAの影響を調査し,基礎となる分子機構を解明する.
- ヒトの甲状腺細胞におけるCl-PFESAの効果を,動物研究からの発見と比較する.
主な方法:
- ヒトの甲状腺の毛皮性上皮細胞 (Nthy-ori 3-1) は,ヒトの血清レベルに相当する濃度でCl-PFESAにさらされました.
- 調査されたメカニズムには,転写因子PAX8の役割,甲状腺特異性遺伝子 (チログロブリン,甲状腺過酸化酵素,カタラゼ,ナトリウムヨウ素共媒体),およびヨウ素共被曝の影響が含まれていた.
主要な成果:
- Cl-PFESAsはヒトの甲状腺細胞におけるチロキシン (T4) とトリヨドチロニン (T3) の合成を著しく増加させた.
- Cl-PFESAsはPAX8を活性化し,甲状腺関連の遺伝子の発現が変化し,TH過剰分泌におけるPAX8の中心的な役割を確認しました.
- ヨウ素の併用曝露は非単調な効果を示し,低〜中レベルのTH分泌を高め,高レベルのTH分泌を抑制しました.
結論:
- Cl-PFESAsは,環境的に重要な濃度で,ヒトの甲状腺細胞特異的高甲状腺効果を誘導する.
- PAX8媒介の分子メカニズムが,Cl-PFESA誘発TH高分泌の基礎となっている.
- ヨウ素の摂取状態は,Cl-PFESAsの毒性効果を修正し,これらのPFASの代替品の潜在的な健康リスクを強調する可能性があります.
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