腸内代謝産物であるインドル-3プロピオネートは,神経の再生と修復を促進する
Elisabeth Serger1,2, Lucia Luengo-Gutierrez1, Jessica S Chadwick1
1Division of Neuroscience, Department of Brain Sciences, Imperial College London, London, UK.
Nature
|June 22, 2022
まとめ
断続的な断食 (IF) は,腸内細菌に由来するインドル-3プロピオニン酸 (IPA) を増加させることで,外周神経の再生を促進します. この代謝物質は,マウスのシアティック神経損傷後の軸索の再生と機能回復を促進します.
科学分野:
- 神経科学
- 微生物学
- 免疫学
背景:
- 哺乳類の周回神経系 (PNS) の再生は,軸索の再生が遅いことから制限されます.
- 環境要因とシグナル伝達経路は軸索再生に影響する.
- 断続的な断食 (IF) は再生に関連する経路を活性化しますが,軸索修復への影響は不明です.
研究 の 目的:
- 坐骨神経損傷後の軸索再生に対する断続的な断食 (IF) の効果を調査する.
- 腸内微生物とその代謝産物の役割を含む,根本的なメカニズムを解明する.
主な方法:
- ネズミのサイアティック神経の損傷モデル
- 断続的な断食 (IF) 介入
- 腸内微生物の構成と血清代謝産物 (インドル3プロピオン酸 - IPA) の分析
- 背骨の根のガンジアのRNA配列解析
- 中性粒子の化学反応の抑制
主要な成果:
- サイアス神経が潰れた後の軸索の再生を著しく促進した.
- この効果は腸内微生物群,特にクロストリジウム・スポロゲンと血清IPA濃度の上昇に依存した.
- 外因的なIPA投与により,軸索再生が促進され,感覚機能の回復が加速された.
- IPA媒介による再生反応における中性粒子の化学反応の役割は,メカニズム研究によって示された.
結論:
- 断続的な断食 (IF) は,辺縁神経損傷後の軸索再生と機能回復を促進します.
- 腸内微生物群のメタボリートであるインドル3プロピオン酸 (IPA) は,IFの再生効果の重要な媒介体である.
- IPAは,中性粒子の化学反応を含む免疫媒介メカニズムを通じて再生を促進する.
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