ホストの代謝は,胆酸信号の微生物の調節を均衡させる
Tae Hyung Won1,2, Mohammad Arifuzzaman3,4, Christopher N Parkhurst3
1Department of Chemistry and Chemical Biology, Boyce Thompson Institute, Cornell University, Ithaca, NY, USA.
Nature
|January 8, 2025
まとめ
腸内微生物群は,胆酸 (BA) を通して生理に影響を与えます. BA-メチルシステアミン (BA-MCY) 結合体への宿主変異は,宿主と微生物の代謝経路のバランスをとって,それらの機能を逆転させます.
科学分野:
- 微生物学
- メタボロミクス
- 生理学
背景:
- 胆酸 (BA) などの腸内微生物の代謝物は,脊椎動物の生理に大きく影響する.
- 微生物群に由来するメタボリート効果のバランスをとる正確な宿主メカニズムは完全に理解されていません.
研究 の 目的:
- 胆酸機能を調節する宿主由来代謝物を特定する.
- 胆酸代謝におけるヴァニン1 (VNN1) の役割を調査する.
- 新しい胆酸結合物の生理学的影響を解明する.
主な方法:
- マウス組織の非標的代謝学
- バニン1 (VNN1) の発現と機能の分析
- 安定同位体で標識されたBA-メチルシステアミン (BA-MCY) 結合体による体内試験
- ハイパーコレステレミアと微生物群の欠乏症のマウスモデル
- 糞便の微生物移植と食事介入 (イヌリン繊維)
主要な成果:
- 特定されたBA-メチルシステアミン (BA-MCY) 結合体,VNN1に依存し,腸に豊富に存在する.
- BA- MCYは,フリーBAとは異なり,ファルネソイドX受容体 (FXR) 抗体として作用し,胆酸の産生を促進する.
- BA- MCYのサプリメントはマウスの高コレステレミアを改善しました.
- BA- MCYレベルは腸内微生物の構成と食物繊維によって影響されます.
結論:
- 宿主依存のBA-MCY結合は宿主と微生物の代謝経路のバランスをとる重要なメカニズムです.
- BA- MCYは,FXRに依存する生理と脂質代謝の調節に重要な役割を果たします.
- これらの発見は,宿主の代謝に影響を与える新しい宿主-微生物群の相互作用を明らかにしています.
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