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腸内微生物の代謝は,MSH2欠乏症の結腸上皮細胞の変容を誘導する
Antoaneta Belcheva1, Thergiory Irrazabal1, Susan J Robertson1
1Department of Immunology, University of Toronto, Toronto, ON M5S 1A8, Canada.
Cell
|July 19, 2014
まとめ
腸内微生物群を変化させたり,炭水化物を減らすことで,マウスの結腸直腸がん (CRC) に抵抗できます. 腸内微生物は,炎症や変異因子ではなく,炭水化物の代謝産物で結腸細胞の成長を促すことでCRCを促進します.
科学分野:
- 胃腸内科と肝臓病理学について
- 腫瘍学 腫瘍学
- 微生物学 微生物学とは
背景:
- 結腸直腸がん (CRC) の病因は,不一致修復 (MMR) とアデノマトス・ポリポーシス・コリ (APC) のタンパク質欠乏,食事,炎症,腸内微生物群を含む.
- 微生物群と他のCRCのエチオロギー要因の間のシナギスティックメカニズムはまだ不明です.
研究 の 目的:
- 腸内微生物群がMMR欠乏と相互作用するメカニズムを明らかにし,CRCを促進するための食事と食事.
- 特定のマウスモデルにおけるCRC発症における炭水化物由来代謝物の役割を調査する.
主な方法:
- CRCの開発をモデル化するために,APC ((Min/+) MSH2 ((-/-) マウスを利用しました.
- 操作された腸内微生物群の組成と食事中の炭水化物含有量.
- 評価されたCRC発生率,炎症反応,DNA変異因子の生成,結腸上皮細胞増殖.
主要な成果:
- 腸内微生物群の組成を変更したり,食事中の炭水化物を減らすことで,APCのマウスでCRCが著しく減少した.
- 腸内微生物は,ブチラートなどの炭水化物由来代謝産物を提供することでCRCを促進し,MSH2の過剰増殖を促進します.
- MMR経路は,β-カテニンの活性と結腸内のトランジット増幅細胞分化に影響を与える.
結論:
- 腸内微生物群は,特に炭水化物の代謝を通じて,MMR欠乏症の文脈でCRC誘導において重要な役割を果たします.
- 炭水化物の摂取をターゲットにした食事の介入は,特定の微生物および遺伝的要因に関連するCRCリスクを軽減することができます.
- MMR経路は,結腸がんの発症に関連する重要な細胞過程の調節に関与しています.
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