妊娠中の甲状腺ホルモン測定に関連する要因の調査
Miho Fukushita1, Jaeduk Yoshimura Noh1, Natsuko Watanabe1
1Department of Internal Medicine, Ito Hospital, Tokyo, Japan.
European thyroid journal
|August 29, 2025
まとめ
妊娠中の甲状腺ホルモンのレベルは,ヒトの胆管性ホルモン (HCG),アルブミン,甲状腺素結合球蛋白 (TBG) によって影響されます. これらの要因は免疫検査の結果に影響し,妊娠中の甲状腺状態の正確な評価に影響します.
科学分野:
- 内分泌学
- 生殖医学
- 臨床化学
背景:
- 甲状腺の状態の正確な評価は,妊娠の管理に不可欠です.
- 妊娠中の甲状腺ホルモンの変動は慎重に解釈する必要があります.
- 甲状腺ホルモンの免疫測定法には,妊娠特有の要因が影響する可能性があります.
研究 の 目的:
- 妊娠中の甲状腺ホルモンの測定値に対するヒト胆管性高原蛋白 (HCG),アルブミン,甲状腺ホルモン結合グローブリン (TBG) の影響を調査する.
- 化学発光免疫測定法 (CLIA) と電気発光免疫測定法 (ECLIA) で得られた甲状腺ホルモン測定値を比較する.
- これらの要因の妊娠期の変化が 甲状腺ホルモン測定にどのように影響するかを明らかにする.
主な方法:
- 自由なチロキシン (FT4),自由のトリヨドチロニン (FT3),およびチロトロピン (TSH) を,CLIAおよびECLIAを用いて897人の妊婦の血清サンプルで測定した.
- 液体クロマトグラフィー・タンデム質量スペクトロメトリー (LC-MS/MS) で検証された免疫測定結果.
- 甲状腺機能とHCG,アルブミン,TBGのような決定因子の関連性を特定するために多変数回帰分析を使用した.
主要な成果:
- TSH濃度の有意な変動が観察され,ECLIAによって有意な割合が0. 01mIU/ L以下であった.
- 甲状腺ホルモンの濃度は妊娠初期から中期のピークに達し,妊娠後期には減少し,妊娠期以外の基準値を下回った.
- 免疫検査における甲状腺ホルモンの測定値と関連した主な決定因子としてヒト胆管性腺ホルモン (HCG) が挙げられ,アルブミンおよびTBGは,特に特定の濃度範囲において結果に影響を与えた.
結論:
- 妊娠中の甲状腺ホルモンのレベルは,HCGによって大きく影響されます.
- 甲状腺ホルモンの免疫測定は,アルブミンおよびTBG濃度によって異なります.
- 妊娠中の甲状腺機能検査の臨床解釈では,これらの生理学的変動を考慮する必要があります.
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