ハシモトの甲状腺炎の高齢患者における自由T3とサルコペニアとの関連
Jin-Liang Chen1,2, Yuan Gao2, Qian Xiao2
1Department of Endocrinology and Metabolism, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.
Frontiers in endocrinology
|September 2, 2025
まとめ
自由T3 (FT3) 濃度の上昇は,ハシモトの甲状腺炎の高齢患者の筋肉量,強度,身体機能の改善と関連しています. これは,FT3が高齢化による筋肉喪失を防ぐ上で重要な役割を果たすことを示唆しています.
科学分野:
- 内分泌学
- 高齢者医療
- 筋肉生理学
背景:
- 甲状腺ホルモンは,高齢化による筋肉減少 (サルコペニア) に関する役割がますます認められています.
- ハシモトの甲状腺炎 (HT) は,高齢者に影響する一般的な自己免疫性甲状腺疾患である.
研究 の 目的:
- 甲状腺ホルモンの濃度とサーコペニアの関連性を,甲状腺ホルモンを欠いた老年患者で調べる.
- 自由T3 (FT3) レベルが,この特定の集団におけるサルコーペニアリスクと相関するかどうかを判断する.
主な方法:
- 甲状腺機能障害のある442人の高齢者を対象とした横断研究.
- サルコペニア (Asian Working Group for Sarcopenia) (AWGS) 2019の基準を用いて診断されたサルコペニア.
- 体組成,握り力,歩行速度,甲状腺ホルモン濃度 (FT3) を評価した.
- FT3とサルコペニアのリスクを評価するために,ロジスティック回帰分析を使用した.
主要な成果:
- サルコペニア患者では,非サルコペニア患者と比較してFT3濃度が有意に低かった (2. 92 vs 3. 00 pg/ ml).
- FT3は手握りの強さ,歩行速度,骨格筋量との正の関連性を示した.
- FT3値の低下は,サルコペニアのリスクの増加と独立して関連していた (OR0. 533; p=0. 005).
結論:
- FT3のレベルが正常範囲内にあると,骨格筋の質量,握り力,身体機能が向上する.
- これらの発見は,FT3がHTの高齢者におけるサルコペニアを緩和する潜在的役割を強調しています.
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