成長ホルモンは,筋肉と脂肪の可逆性線維症を引き起こす:アクロメガリア患者の研究
Amanda Bæk1,2,3, Mai Christiansen Arlien-Søborg1,3,4, Anne Kathrine Nissen Pedersen2,3
1Department of Endocrinology and Internal Medicine, Department of Clinical Medicine, Aarhus University, Palle Juul-Jensens Boulevard 165, 8200 Aarhus N, Denmark.
European journal of endocrinology
|February 17, 2026
まとめ
アクロメガリーにおける成長ホルモンの過剰は,脂肪および筋肉組織における可逆性線維症を引き起こす. GH過剰を制御する治療は,この線維症を軽減し,炎症ではなく直接のコラーゲン形成効果を示唆します.
科学分野:
- エンドクリノロジー エンドクリノロジー
- メタボリック疾患
- 組織線維症 組織線維症
背景:
- 脂肪組織 (AT) 線維症は肥満とインスリン抵抗性に関連しています.
- 成長ホルモン (GH) 過剰によるアクロメガリーは,インスリン抵抗性を引き起こし,コラーゲン合成を刺激します.
- アクロメガリーの組織線維症への影響は,以前は知られていませんでした.
研究 の 目的:
- アクロメガリー患者の脂肪および筋肉組織におけるコラーゲン周回と線維症を定量化するために.
- アクロメガリーの治療前後の変化を評価する.
主な方法:
- 17人の患者のATコラーゲン含有量と遺伝子発現を分析した.
- 15人の患者で,骨格筋のコラーゲン含有量と血清線維芽細胞活性化タンパク質 (FAPα) を測定した.
- コラーゲン周回バイオマーカーと炎症マーカーを両方のコホートで評価した.
主要な成果:
- ATコラーゲン含有量は,治療後に有意に減少しました (4.6%から2.1%).
- ATにおけるコラーゲンI型とIII型の遺伝子発現は,それぞれ53%と39%減少した.
- 筋肉のコラーゲン含有量とFAPα活動/レベルも,病気の制御後に著しく低下しました.
結論:
- 長期にわたるGH過剰は,ヒトの脂肪および筋肉組織における可逆性線維症を誘発する.
- アクロメガリーの線維症は,炎症ではなく,直接のコラーゲン形成によって引き起こされるようです.
- これは肥満で観察された線維症のメカニズムと対照的です.
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