インドの女性の妊娠初期における25-ヒドロキシビタミンDと副甲状腺ホルモン濃度の関係
Nandini Chopra1,2, Fathima Ayoob3, Roopashree C2
1Centre of Doctoral Studies, Manipal Academy of Higher Education, Manipal 576104, India.
Nutrients
|August 28, 2025
まとめ
新しい研究では,妊娠初期にビタミンD欠乏症 (VDD) を診断するための低い値を示唆し,副甲状腺ホルモン (PTH) 調節に基づいて15.76ng/mLで発生することを発見しました. この改訂されたカットオフは,妊婦の66.1%でVDDを特定し,現在の診断基準を再評価する必要性を強調しています.
科学分野:
- 生殖内分泌と代謝
- 母親と胎児の医学
- 栄養学的生化学
背景:
- 妊娠初期におけるビタミンD欠乏症 (VDD) の高い流行は,妊娠と出産の不良の結果と関連しています.
- 妊娠中のVDD (血清25-ヒドロキシビタミンD<20ng/mL) の現在の診断カットオフは,コンセンサスが欠けている.
- VDDの診断基準の評価は極めて重要です 特にインドの女性のような特定の集団の妊娠初期にです
研究 の 目的:
- 明らかに健康なインド人女性の妊娠初期におけるビタミンD欠乏症 (VDD) の診断基準を評価する.
- 副甲状腺ホルモン (PTH) が最大限抑制される血清25-ヒドロキシビタミンD (25(OH) D濃度のブレイクポイントを決定する.
- この集団でVDDに関連した要因を特定する.
主な方法:
- 妊娠14週未満の,明らかに健康なインド人妊婦395人を対象とした横断的な研究.
- 人口統計,産婦人科,人体測定データ,血清サンプルを集めて25...OH) DとPTHを測定する.
- 最大のPTH抑制の25[OH]Dブレイクポイントを特定するためのセグメンテッド回帰分析;VDD関連性の共変量分析.
主要な成果:
- 25 ((OH)) Dが減少したPTH増加のブレイクポイントは15. 76ng/ mL (95%CI: 12. 3~ 19. 2) であった.
- この値を使用すると,女性の66. 1%がVDDで,現在のカットオフ値 < 20 ng/ mLでは82. 0%でした.
- VDDは,均等性,季節 (冬,モンスーン後),貧血,および身体活動レベルと有意に関連していました.
結論:
- 妊娠初期におけるVDDの診断基準値 (15. 76 ng/ mL) は現在の推奨値より低い.
- ビタミンDの状態の評価は,変形可能および変形不能の要因である, 均等性,貧血,季節,および活動により複雑です.
- 長期的研究を用いた既存のVDDのカットオフの再評価は,不良妊娠結果との因果関係を確立するために必要です.
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