経口ナイトライト補給が高齢者のミトコンドリア呼吸と身体機能に与える効果
Daniel E Forman1, Subashan Perera2, Sruti Shiva3
1Department of Medicine, University of Pittsburgh (Divisions of Geriatrics and Cardiology), and Geriatrics, Research, Education and Clinical Center (GRECC), VA Pittsburgh Healthcare System, Pittsburgh, PA.
まとめ
口服によるニートリートサプリメントは,高齢者の筋肉機能を改善しませんでした. 血小板の呼吸が改善した一方で,骨格筋の反応は,体が窒素を処理する方法の年齢に関連する違いを示唆しています.
科学分野:
- ゲロントロジーはゲロントロジーの学科です.
- ミトコンドリア生物学
- 栄養科学とは,栄養科学である.
背景:
- 年齢に伴うミトコンドリア機能の低下は,疾患のリスクを高めます.
- 口服によるニートリート/ニートレートサプリメントは,若い成人に有益ですが,高齢者では研究されていません.
研究 の 目的:
- 高齢者 (≥70歳) の筋肉ミトコンドリア呼吸に対する経口ナトリウム窒素酸塩の影響を調査する.
- この集団における心呼吸器の健康と身体機能への影響を評価する.
主な方法:
- 12週間のランダム化,ダブルブラインド,プラセボ対照試験で,64人の座っている高齢者が参加しました.
- 主要アウトカム:骨格筋のミトコンドリア呼吸の変化 (CI&II MaxOXPHOS).
- 二次的アウトカム:血小板のバイオエネルギー,運動能力,身体機能.
主要な成果:
- 骨格筋のミトコンドリア呼吸,運動能力,または身体機能の有意な改善は観察されなかった.
- 血小板ミトコンドリア呼吸は,急性ニートリート投与後に有意な改善を示した.
- 血におけるナイトライト濃度はかなり上昇したが,投与後の骨格筋ではほとんど増加しなかった.
結論:
- 組織特異の薬理動力学と薬理動力学は,高齢者のニートリートサプリメントの有効性に影響します.
- 骨格筋と血小板ミトコンドリアの異なる反応は,薬物投与,代謝,または反応の年齢に関連する変化を示唆しています.
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