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アシンメトリック・ディメチルアルギニン,血圧,高齢者における腎臓 perfusion
Jan T Kielstein1, Stefanie M Bode-Böger, Jürgen C Frölich
1Department of Internal Medicine, Medical School Hannover, Germany.
Circulation
|April 16, 2003
まとめ
酸化窒素 (NO) 阻害剤である非対称性ダイメチルルギニン (ADMA) の濃度の上昇は,高齢者の腎臓の血流の減少と高血圧に関連しています. これは,ADMAが年齢関連の高血圧に作用することを示唆しています.
科学分野:
- ネフロロジーはネフロロジーを用います.
- 心血管科学 心血管科学
- ゲロントロジーはゲロントロジーの学科です.
背景:
- 酸化窒素 (NO) の利用率の低下は,腎血管トーンと血圧の年齢関連の増加に関連しています.
- 非対称性ダイメチルルギニン (ADMA) は,NO合成酵素の内生性阻害剤である.
- この研究では,腎臓の血液動力学とADMAレベルを若者,高齢の健康者,高血圧の高齢者と比較した.
研究 の 目的:
- 腎臓の血液動力学と血圧の年齢に関連する変化における非対称性ディメチルルギニン (ADMA) の役割を調査する.
- 若い健康な成人,高齢の健康な成人,エッセンシャル高血圧の高齢者の間でADMAレベルと腎機能を比較する.
主な方法:
- 血中の非対称性ダイメチルアルギニン (ADMA) の濃度が測定されました.
- 腎血管抵抗 (RVR) と有効腎血流 (ERPF) を含む腎臓の血液動力学が評価されました.
- 3つのグループを比較した:若い健康な被験者,高齢の健康な被験者,および本質的な高血圧の高齢者.
主要な成果:
- 年配の被験者は,若者と比較して,プラズマのADMA濃度と腎血管抵抗 (RVR) が著しく高く,腎臓のプラズマフロー (ERPF) が低かった.
- 高血圧の高齢者は,若年および高齢の健康なグループよりもさらに高いADMAレベルとRVR,および低いERPFを示しました.
- ロジスティック回帰分析により,ADMAはERPFとRVRの独立した決定因子であり,血清糖とともに血圧の予測因子であると特定されました.
結論:
- 高齢者のADMAの蓄積は,腎臓 perfusionの減少と高血圧に関連しています.
- これらの発見は,ADMAが年齢に関連した腎機能の低下と高血圧に寄与するという仮説を支持する.
- ADMAのターゲティングは,年齢に関連する腎血管機能不全と高血圧の管理のための治療戦略を提供することができます.
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