一酸化炭素代謝の変化 代謝機能不全に関連した脂肪性肝疾患はセマグルチドによって修正される
Mikkel Parsberg Werge1, Adrian McCann2, Elias Badal Rashu1
1Gastro Unit, Copenhagen University Hospital Hvidovre, Hvidovre, Denmark.
Annals of hepatology
|September 1, 2025
まとめ
脂肪肝疾患 (MASLD) の代謝機能障害は,一炭素代謝の変化を伴う. セマグルチド治療はマウスモデルでこれらの変化を逆転させ,MASLDの治療の可能性を示唆しました.
科学分野:
- 生物化学
- メタボロミクス
- ゲノミクス
背景:
- 一炭素代謝 (OCM) 障害は,心代謝疾患に関与しています.
- 非アルコール性脂肪肝症 (NAFLD) とその進行型である代謝機能障害に関連する脂肪肝炎 (MASH) は,世界的に健康上の懸念が高まっています.
- MASLDの代謝の基礎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:
- MASLD患者のOCM代謝産物と酵素の変化を調査する.
- ダイエットによるMASHマウスモデルにおけるOCMに対するセマグルチドの影響を評価する.
主な方法:
- 100人のMASLD患者と50人の対照群の血と肝臓のサンプルで標的メタボロミクスと大量トランスクリプトミクス.
- セマグルチドまたはベキチャーで治療されたダイエット誘発肥満およびMASH (DIO- MASH) のマウスにおける肝臓および血の非標的代謝およびトランスクリプトミクス.
- 葉酸,ビタミンB6,ベタイン,セリン,グリシン,グルタミン酸のレベルと,主要な酵素の活性度の分析.
主要な成果:
- MASLD患者では,OCM代謝産物 (葉酸,ビタミンB6,ベタイン,セリン,グリシン) の濃度が変化し,ホモシステインとグルタミン酸が上昇し,硫化変異とメチオニン/葉酸サイクルが乱れたことを示した.
- これらの代謝変化は,酵素活動の変化と相関し,DIO- MASHマウスで反映された.
- DIO- MASHマウスのセマグルチド治療は体重,肝炎,線維症を軽減し,観察された代謝および遺伝子発現の変化を大きく逆転させた.
結論:
- MASLDは,OCMの代謝産物と酵素の有意な変化と関連しています.
- MASLD患者で観察された代謝の変化は,臨床前マウスモデルで再現された.
- セマグルチドは,これらの代謝障害を逆転させ,MASHマウスモデルでの肝臓病変を改善する効果を示した.
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