プラズマビタミンB6と女性における心筋梗塞のリスク
John H Page1, Jing Ma, Stephanie E Chiuve
1Department of Epidemiology, Harvard School of Public Health, Boston, MA, USA. john_page@post.harvard.edu
Circulation
|August 12, 2009
まとめ
プラズマのピリドクサルリン酸塩 (ビタミンB6) 濃度の上昇は,女性における心筋梗塞のリスクの低下と関連していた. この関連性は,ビタミンB6の状態が食事以外にも心臓の健康に役割を果たす可能性があることを示唆しています.
科学分野:
- 心血管疾患の流行病学について
- 栄養バイオケミストリー
背景:
- ビタミンB6の状態と心筋梗塞 (MI) リスクとの関連を調査することは,心血管疾患の予防を理解するために重要である.
- ビタミンB6の活性形態であるピリドクサールリン酸の断食後の血濃度が,心筋梗塞のリスクに関連して調べられました.
研究 の 目的:
- 断食中のプラズマピリドクサールリン酸塩濃度と,女性における心筋梗塞の発症リスクとの関連性を前向きに評価する.
- この関連が,食事によるビタミンB6の摂取と他の混同因子から独立しているかどうかを判断する.
主な方法:
- 血液サンプルを提供した32,826人の女性を対象とした前向きなコホート研究.
- インシデント心筋梗塞の症例は対照群と一致し,条件付きロジスティック回帰を用いて分析されました.
- 伝統的な冠動脈リスク因子,人体測定値,食事,その他のバイオマーカーの調整が行われました.
主要な成果:
- プラズマピリドクサールリン酸塩の断食時の濃度の上昇と心筋梗塞のリスクとの間に有意な逆相関が観察されました (最高四分位数と最低四分位数の比率: 0.22).
- ピリドクサルリン酸塩の保護効果は,高齢女性と比較して,若い女性 (<60歳) でより顕著でした.
- この関連性は,食事によるビタミンB6摂取量から部分的に独立しているようでした.
結論:
- 断食中のプラズマピリドクサールリン酸塩濃度は,女性における心筋梗塞のリスクと逆に関連しています.
- 食事による摂取以外の要因は,血ビタミンB6の状態に影響し,心臓血管の健康におけるその役割に関するさらなる調査を正当化します.
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