ビタミンD受容体アレルによる骨密度の予測
N A Morrison1, J C Qi, A Tokita
1Garvan Institute of Medical Research, St Vincent's Hospital, Sydney, New South Wales, Australia.
Nature
|January 20, 1994
まとめ
ビタミンD受容体遺伝子の遺伝的変異は,骨密度を有意に予測し,遺伝的影響のほとんどを占めています. 特定のゲノタイプは,閉経後の女性の骨粗鬆症のリスクの増加と関連しています.
科学分野:
- 遺伝学 遺伝学とは
- エンドクリノロジー エンドクリノロジー
- 骨の生物学 骨の生物学
背景:
- 成人初期に到達したピーク骨質は,骨粗鬆症の骨折を予防するために重要である.
- 骨折の主な危険因子である低骨密度は,骨の周回に影響する遺伝因子によって著しく影響されています.
- 骨粗鬆症の骨折は,特に閉経後,かなりの割合の女性に影響します.
研究 の 目的:
- ビタミンD受容体遺伝子の一般的なアレル変異と骨密度との関連性を調査する.
- ビタミンD受容体遺伝子変異が骨密度に対する遺伝的貢献をどの程度説明するかを決定する.
- 特定のビタミンD受容体遺伝子型が,骨密度が低い女性において過剰に表現されているかどうかを評価する.
主な方法:
- ビタミンD受容体遺伝子における一般的なアレル変異の遺伝子型決定.
- 健康な個人のコホートにおける骨密度の測定.
- 遺伝子型と骨密度測定を相関させるための統計分析.
- 骨密度が正常な女性と骨密度が低い女性のゲノタイプ頻度の比較.
主要な成果:
- ビタミンD受容体遺伝子の一般的なアレル変異は,骨密度の違いを予測し,総遺伝効果の75%まで説明します.
- 低骨密度に関連する特定の遺伝子型は,骨密度が正常値より2標準偏差以上低い閉経後の女性において過剰に表現されていることが判明しました.
- 潜在的な分子メカニズムは,3'未翻訳領域のアレル差異がメッセンジャーRNAレベルに影響を及ぼすことを含む.
結論:
- ビタミンD受容体遺伝子変異は,骨密度の重要な決定因子であり,骨粗鬆症のリスクの予測因子である.
- これらの発見は,ビタミンD受容体遺伝子が骨質を調節する役割を強調しています.
- ビタミンD受容体遺伝子型に基づく標的介入は,骨粗鬆症の予防のための新しい戦略を提供することができます.
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