25-ヒドロキシビタミンD濃度の遺伝的変異および関連性は,主要な臨床結果と関連しています
Gregory P Levin1, Cassianne Robinson-Cohen, Ian H de Boer
1Department of Biostatistics, University of Washington, Seattle, USA.
JAMA
|November 15, 2012
まとめ
低ビタミンDレベルは慢性疾患のリスクを高めますが,ビタミンD受容体 (VDR) の遺伝的変異は,この関連性を変化させることができます. この研究では,低ビタミンDに関連した健康リスクを変更する特定のVDR遺伝子変異を特定しました.
科学分野:
- 遺伝学と分子生物学について
- 栄養科学とは,栄養科学である.
- エピデミオロジー エピデミオロジー
- ゲロントロジーはゲロントロジーの学科です.
背景:
- 低血清25-ヒドロキシビタミンDは,様々な慢性疾患のリスクの増加と関連しています.
- ビタミンDは,生物学的活性のためにその活性形態 (1,25-ジヒドロキシビタミンD) に変換する必要があります.
- ビタミンDの代謝における個々の差異は,測定されたビタミンD濃度の臨床的影響に影響を与える可能性があります.
研究 の 目的:
- 重要なビタミンD経路遺伝子の共通の遺伝的変異が,低25-ヒドロキシビタミンDと主要な健康結果の間の関連性を修正するかどうかを決定する.
- 研究対象となる遺伝子は,ビタミンD結合タンパク質,メガリン,キュビリン,CYP27B1,CYP24A1およびビタミンD受容体 (VDR) の遺伝子を含む.
主な方法:
- 心血管健康研究 (CHS) の白人の1514人の参加者の141つの単核性多形態 (SNPs) を分析した.
- 血清25-ヒドロキシビタミンD濃度が測定され,参加者は平均11年間追跡された.
- 複製メタ解析は,3つの独立したコミュニティベースのコホートで行われました:米国の健康,老化,および体組成,イタリアのInvecchiare in Chianti,およびスウェーデンのUppsala長距離研究 成人男性.
主要な成果:
- 5つのSNPは,発見段階で低25-ヒドロキシビタミンDとの相互作用を示しました.
- ビタミンD受容体 (VDR) 遺伝子変異体 (rs7968585) を含む有意な相互作用が複製されました.
- CHS参加者において,25-ヒドロキシビタミンDの低濃度は,複合的な結果 (股関節骨折,心筋梗塞,がん,死亡率) のリスク増加と関連していたのは, rs7968585の1つまたは2つのマイナーアレルを有する個体においてのみであり,マイナーアレルゼロの個体において関連性は観察されなかった.
結論:
- 低血清25-ヒドロキシビタミンDと主要な健康結果の間の関連性は,一般的な遺伝的変異によって調節される可能性があります.
- 特に,ビタミンD受容体 (VDR) 内の遺伝的差異は,ビタミンDレベルが低い場合の臨床的結果に影響します.
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