血ナトリウレチンペプチド濃度の遺伝性と遺伝的関連性
Thomas J Wang1, Martin G Larson, Daniel Levy
1Framingham Heart Study, MA 01702-5827, USA.
Circulation
|June 25, 2003
まとめ
遺伝的要因は,ナトリウレチンペプチドのレベルに大きく影響し,塩のバランスと血圧の調節に影響を与えます. この研究では,プラズマのN-ターミナルプロアトリアルナトリウレチンペプチド (N-ANP) と脳ナトリウレチンペプチド (BNP) レベルにおける遺伝性を明らかにしました.
科学分野:
- 心血管遺伝学 心血管遺伝学
- エンドクリノロジー エンドクリノロジー
- 人間の生理学 人間生理学
背景:
- ナトリウレチンペプチドは,水分バランスと血圧の維持に不可欠です.
- ナトリウレチンペプチド濃度の個体間の差異は,高血圧や流体過負荷に対する感受性に影響を与える可能性があります.
- ナトリウレチンペプチドレベルの変動に対する遺伝因子の寄与は十分に理解されていません.
研究 の 目的:
- プラズマのN-ターミナルプロアトリアルナトリウレチンペプチド (N-ANP) と脳ナトリウレチンペプチド (BNP) レベルの遺伝性を調査する.
- ナトリウレチンペプチド調節に関連する潜在的な遺伝的位置を特定する.
主な方法:
- 1914年のフラミンガム研究参加者の血のN-ANPとBNP濃度の分析.
- 遺伝性を推定するために,変数成分法 (SOLAR) の適用.
- 10cM密度のゲノムスキャンを用いた全ゲノム関連分析は,大家族1142人の参加者に実施した.
主要な成果:
- 臨床的およびエコーカルディオグラフィの要因を考慮した後,ログN-ANPとログBNPの遺伝推定値はそれぞれ0.44および0.35であった (P<0.0001).
- 年齢,臨床,心声変数は,N-ANPの変動の42% (男性) と27% (女性),BNPの変動の40% (男性) と21% (女性) を説明しています.
- N-ANPとBNPの示唆的な関連性は,それぞれ染色体2p25と12p13で特定されました.
結論:
- 血のナトリウレチンペプチド濃度の説明不能な変動の大部分は,添加的な遺伝効果によるものです.
- これらの発見は,ナトリウレチンペプチドのレベルを調節する遺伝子の役割を強調しています.
- 候補遺伝子研究を含むさらなる研究は,特定の遺伝的調節体を特定するために正当化されています.
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