長期COVIDと慢性疲労症候群/筋痛性脳炎は,運動制限の同様の病理生理学的メカニズムを共有しています
Swathi Jothi1, Michael Insel1, Guido Claessen2
1Division of Pulmonary, Critical Care, Sleep, and Allergy Medicine, University of Arizona, Tucson, Arizona, USA.
Physiological reports
|September 2, 2025
まとめ
SARS-CoV-2 (PASC) の急性後遺症と慢性疲労症候群/肌痛性脳炎 (CFS/ME) は運動不耐性を共有しています. 骨格筋の酸素拡散の障害は,両方の条件において重要な制限因子であり,潜在的な治療目標を示唆する.
科学分野:
- 心肺運動の生理学
- 慢性疾患の病理生理学
- 呼吸器および代謝薬
背景:
- SARS-CoV-2の急性後遺症 (PASC) と慢性疲労症候群/筋痛性脳炎 (CFS/ME) は,運動性呼吸不全を含む重複する症状を伴う複雑な疾患である.
- これらの状態における運動不耐性の 基礎となる生理学的メカニズムを理解することは 効果的な治療法の開発に不可欠です
研究 の 目的:
- PASCとCFS/MEにおける運動制限の共有メカニズムを,運動酸素経路分析を用いて調査する.
- 酸素の輸送と利用の特定のパラメータを特定し,これらの患者グループで最も損なわれています.
主な方法:
- 15人のPASC患者,11人のCFS/ ME患者,そして11人の健康な対照群で,侵襲的な心肺運動検査を実施した.
- 運動による酸素経路の分析では6つのパラメータを評価した. 胞呼吸量 (V·a),肺の拡散量 (DL),心臓の出力量 (Q̇),骨格筋の拡散量 (DM),ヘモグロビン (Hb),ミトコンドリアの酸化リン酸化 (Vmax).
- 各パラメータは,ピーク酸素消費量 (V̇O2ピーク) に対する個々の影響を評価するために順次正常化されました.
主要な成果:
- ピーク酸素消費量 (V·O2ピーク) は,PASCとCFS/ MEの両グループで,対照群と比較して有意に減少した.
- 骨格筋O2拡散 (DM) は,両方の患者コホートにおいて最も有意に低下したパラメータとして現れました (p=0. 01).
- DMのみをシミュレートすることで,V̇O2を大幅に改善した (PASCでは66%,P=0.008;CFS/ MEでは34. 7%,P=0. 06).
結論:
- 骨格筋の酸素拡散障害 (DM) は,PASCとCFS/MEの両方の運動不耐症に寄与する主要な共同メカニズムです.
- 周辺の酸素抽出をターゲットに,特に骨格筋の拡散能力を改善することは,これらの衰弱状態のための有望な治療戦略を代表する可能性があります.
- これらの発見を確認し,治療的介入を検討するために,より大きなサンプルサイズでのさらなる研究が必要である.
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