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超低用量マイクロ化17β-エストラディオールと高齢女性における骨密度および骨代謝:ランダム化制御試験
Karen M Prestwood1, Anne M Kenny, Alison Kleppinger
1Center on Aging, University of Connecticut Health Center, Farmington 06030, USA. Prestwood@nso1.uchc.edu
JAMA
|August 28, 2003
まとめ
低用量エストロゲン療法 (0.25 mg/日17β-エストラディオール) は,健康な高齢の閉経後の女性において,骨のミネラル密度を効果的に増加させ,骨の周回量を3年間にわたって減少させた. この治療は,最小限の副作用を示し,骨粗鬆症の予防のための安全で効果的な選択肢を示唆しました.
科学分野:
- エンドクリノロジー エンドクリノロジー
- ゲロントロジーはゲロントロジーの学科です.
- 骨の代謝についてです.
背景:
- エストロゲン療法は,骨粗鬆症の予防のために認められています.
- 従来の用量は,有害事象と関連しています.
- 低用量のエストロゲン (0.25 mg/d) が骨の減少を予防する効果は未だに確立されていない.
研究 の 目的:
- 0.25 mg/dの微細化された17β-エストラディオールが骨のミネラル密度 (BMD) と骨の周回量に及ぼす影響を評価する.
- 健康で高齢の閉経後の女性で3年間の治療期間中にこれらの効果を評価する.
主な方法:
- 3年間のランダム化,ダブルブラインド,プラセボ対照試験.
- 65歳以上の健康な女性167人を対象に実施した.
- BMDは毎年測定され,骨の周回とホルモンのレベルの生化学的マーカーがベースライン,3ヶ月,1年,3年に評価されました.
主要な成果:
- 低用量のエストロゲンは,プラセボと比較して,ヒップ,脊椎,全身のBMDを有意に増加させた (P<.001).
- 骨の転移マーカー (N-テロペプチド,骨のアルカリ性ファスファタゼ) は,低用量エストロゲン (P<.001) で有意に減少しました.
- 副作用のプロファイルはグループ間で類似しており,乳房の痛感,子宮内膜の変化,またはマンモグラフィの結果において有意な差異はありませんでした.
結論:
- 低用量17β-エストラディオール (0.25 mg/d) は,骨密度を効果的に増加させ,高齢女性における骨の周回を減少させます.
- この治療は,最低限の副作用で,良好な安全性プロファイルを示した.
- 低用量のエストロゲンが骨折予防に及ぼす効果を調査するためにさらなる研究が必要である.
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