低ナトリウム食は,高齢者におけるベータアドレナジック反応の欠陥を修正する
1Department of Medicine, University of Western Ontario, London, Canada.
Circulation
|February 1, 1992
まとめ
低ナトリウム食は,高齢者のベータアドレナジック反応性を改善し,血管およびリンパ球の機能を高めます. この食生活の変化は,高齢者の血圧と血管のトーンを調節するのに役立ちます.
科学分野:
- 心血管の生理学 心血管の生理学
- ゲロントロジーはゲロントロジーの学科です.
- 薬理学 薬理学とは
背景:
- 老化はベータ・アドレノ受容体の反応性低下と関連しており,これは重要な心血管異常である.
- 食事中のナトリウム制限は,以前,高血圧の個人にベータ-アドレノ受容体反応の欠陥を修正しました.
研究 の 目的:
- 高齢者における血管およびリンパ球のβ-アドレナージ反応に対する食事中のナトリウム制限の効果を調査する.
- 低ナトリウム食が,ベータアドレナージ機能の年齢関連の欠陥を修正できるかどうかを判断する.
主な方法:
- 高ナトリウム (400mK/日) または低ナトリウム (10mK/日) のダイエット中の10人の高齢のノルモテンシブ被験者 (56歳+/- 2歳) を研究した.
- 最大のイソプロテレノール媒介の血管拡張を介して血管反応を評価した.
- アイソプロテレノールに対するリンパ球アデニリルサイクラースの感受性を測定した.
主要な成果:
- アイソプロテレノールによる最大血管拡張は,若い被験者と比較して,高ナトリウムダイエットを受けた高齢者において減少した.
- 高齢者における低ナトリウム食は,血管拡張とリンパ球アデニリルサイクラゼの感受性を有意に増加させた.
- 血圧は低ナトリウムダイエットで低下し,平均動脈圧は血管拡張と逆相関しています.
結論:
- 低ナトリウムダイエットは,老化に関連した血管およびリンパ球のベータアドレナージク反応の低下を効果的に修正します.
- 食事の変更は,高齢者の血管調子のアドレナージック調節に重要な役割を果たします.
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