高脂肪食と肥満は,それぞれ腫瘍細胞の増殖と実験癌カケキアにおける筋肉の消耗を増加させる
Brittany R Counts1,2, Andrea Bonetto3,4,5,6,7, Ho Lam Chan3
1Department of Cell, Developmental & Cancer Biology, Oregon Health & Science University, Portland, OR, USA.
American journal of physiology. Cell physiology
|February 21, 2026
まとめ
高脂肪食 (HFD) と肥満は,炎症と筋肉の損失を増加させることで,がんカシェキアと腫瘍の成長を悪化させます. これらの要因は,食事と肥満によって引き起こされ,がん治療の潜在的治療標的を提示します.
科学分野:
- 腫瘍学 腫瘍学
- メタボリズムは
- 免疫学 免疫学とは
背景:
- 高脂肪食 (HFD) と肥満は,がんの発症と死亡率に関連しています.
- 肥満は逆説的に,肺がん患者の生存期間を長くするとの相関関係があり,体質の保護的役割を示唆しています.
- 体重減少と筋肉の消耗によって特徴づけられるカケキシアは,肺がんでは一般的であり,肥満によって悪化することがあります.
研究 の 目的:
- HFDと肥満が,がんのカシェキアと腫瘍の成長に与える独特で併合された影響を調査する.
- HFD誘発の肥満とルイス肺がん (LLC) を用いたマウスのがんカシェキアをモデル化するために.
- カシェキシアと腫瘍の進行を緩和するための潜在的な治療標的を特定する.
主な方法:
- 痩せたマウスとHFD誘発の肥満マウスを利用し,LLC腫瘍とLLC腫瘍を併用した.
- 推定体重,組織質量 (筋肉,脂肪,心臓),腫瘍負担,および炎症マーカー.
- 組織における分析されたサイトカイン発現 (例えば,IL-6) とSTAT3のリン酸化.
- 腫瘍細胞の増殖を in vivo および in vitro で評価した.
主要な成果:
- HFD単独では,筋肉の喪失と炎症を悪化させましたが,腫瘍の負荷は増加しませんでした.
- 腫瘍を有する肥満マウスは,最も重度のカシェキシア,腫瘍負荷の増加,および腫瘍細胞増殖の増大を示した.
- HFDと既存の肥満は,それぞれ独立して炎症,カシェキア,腫瘍の成長を増幅した.
- 肥満のHFDマウスからの血清は,LLC細胞の増殖を in vitroで促進しました.
結論:
- HFDと慢性肥満は,明らかにがんに関連する炎症とカシェキシアを悪化させる.
- 肥満はカシェキシアを著しく悪化させ,腫瘍の成長と増殖を促進します.
- HFD誘発の炎症や肥満誘発のカシェキアをターゲットにすることで,がんの進行を遅らせるための治療戦略を提供することができる.
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