腫瘍に由来するPTH関連のタンパク質は,脂肪組織の茶色化と癌のカシェキシアを誘発する
Serkan Kir1, James P White1, Sandra Kleiner1
1Department of Cancer Biology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts 02215, USA.
Nature
|July 22, 2014
まとめ
腫瘍に由来する副甲状腺ホルモン関連タンパク質 (PTHrP) は,がんカシェキアにおける茶色の脂肪の活動と筋肉の消耗を誘発する. マウスのPTHrPを中和させることで,これらの効果が軽減され,患者のアウトカムを改善するための潜在的な治療目標を示唆しました.
科学分野:
- 腫瘍学 腫瘍学
- メタボリック障害 メタボリック障害
- 分子生物学は分子生物学である.
背景:
- ガンカシェキア (cancer cachexia) は,がん患者の約50%に影響を与える,衰弱させる消耗障害である.
- カケキシアは,体重の減少,筋肉の縮,および休息時のエネルギー消費量の増加によって特徴付けられます.
- 茶色脂肪組織における熱生成の増加はカシェキアに関与しているが,腫瘍に起因するメカニズムは不明である.
研究 の 目的:
- ブラウン脂肪の活性とカシェキシアを誘発する腫瘍由来因子の役割を調査する.
- カケキシアにおける代謝失調と腫瘍を結びつける特定の分子経路を特定する.
主な方法:
- 癌のカシェキシアを研究するために,ルイス肺がんのマウスモデルを使用しました.
- 副甲状腺ホルモン関連のタンパク質 (PTHrP) の中和療法.
- 評価された脂肪組織の茶色化,発熱に関連する遺伝子発現,筋肉量,および強さ.
主要な成果:
- 腫瘍に由来するPTHrPは,脂肪組織の茶色化と熱生成の重要な媒介者として特定されました.
- PTHrPの中和は,脂肪組織の茶色化を効果的に阻害し,腫瘍を患ったマウスの筋肉質と強さの損失を予防しました.
- PTHrPは,脂肪組織内の熱生成に関与する遺伝子の発現を直接誘導する.
結論:
- PTHrPは,がんカシェキシアにおける脂肪組織の茶色化によるエネルギー浪費を媒介する上で重要な役割を果たします.
- PTHrPをターゲットにすることは,がんのカシェキシアを緩和し,患者の生存率と生活の質を潜在的に改善するための有望な治療戦略を提供します.
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