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微生物群によって生成された代謝物質は,腸-脳神経回路を通じて代謝効果を促進します
Filipe De Vadder1, Petia Kovatcheva-Datchary2, Daisy Goncalves1
1Institut de la Santé et de la Recherche Médicale, U855, Lyon 69372, France; Université de Lyon, Lyon 69008, France; Université Lyon 1, Villeurbanne 69622, France.
Cell
|January 14, 2014
まとめ
腸内微生物による溶性繊維発酵により,腸内グルコネオゲネシス (IGN) を活性化する短鎖脂肪酸 (SCFA) が生成されます. この活性化は,繊維が体重とグルコースコントロールに与える代謝効果に極めて重要です.
科学分野:
- メタボリック・ヘルス メタボリック・ヘルス
- 腸内微生物群の研究
- 栄養科学とは,栄養科学である.
背景:
- 溶解性食物繊維は,体重とグルコースの調節に代謝上の利点をもたらしますが,そのメカニズムは不明です.
- 腸内グルコネオゲネシス (IGN) は,グルコースとエネルギーバランスにおける役割として認識されています.
- 腸内微生物群は,食物繊維を短鎖脂肪酸 (SCFA) に発酵させ,宿主の代謝に影響を与えます.
研究 の 目的:
- 溶解性繊維発酵から得られたSCFAが代謝の恒常性に影響を与えるメカニズムを解明する.
- SCFAと食物繊維の代謝効果を媒介する腸内グルコン生成 (IGN) の役割を調査する.
主な方法:
- マウスにおけるIGN活性化に対するプロピオネートとブチラート (SCFA) の影響を調査した.
- cAMP経由でブチラートのメカニズムを理解するために遺伝子発現分析を利用した.
- 腸-脳神経回路とFFAR3.3を含むプロピオネートのメカニズムを調べた.
- SCFAまたは繊維で治療されたIGN欠乏したマウスと正常なマウスの代謝結果の比較.
主要な成果:
- ブチラートは,cAMPに依存する経路を通じて,IGN遺伝子発現を活性化します.
- プロピオネートは,FFAR3を含む腸-脳神経回路を通じてIGN遺伝子発現を活性化し,IGN基板として作用します.
- SCFAと繊維の代謝効果 (体重,グルコースコントロール) は,IGN欠乏したマウスでは廃止された.
- 腸内微生物群の組成の変化は,正常なマウスとIGN欠乏したマウスで類似しており,IGNの特定の役割を強調しています.
結論:
- プロピオネートやブチラートなどのSCFAは,異なるメカニズムを通じて腸内グルコネオゲネシス (IGN) を活性化します.
- IGNの調節は,可溶性繊維とSCFAが体重とグルコースコントロールに与える代謝効果を実現するために不可欠です.
- IGNのターゲティングは,代謝健康への介入のための潜在的な戦略です.
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