インタールイキン-22は腸幹細胞媒介の上皮再生を促進する
Caroline A Lindemans1,2, Marco Calafiore1, Anna M Mertelsmann1
1Department of Medicine, Memorial Sloan-Kettering Cancer Center, New York, New York.
Nature
|December 10, 2015
まとめ
生まれながらのリンパ性細胞 (ILC) は,損傷後の腸内皮質再生を促進し,インタールイキン22 (IL-22) を生成する. IL-22は腸の幹細胞 (ISC) を直接活性化し,その成長を促進し,組織修復を促します.
科学分野:
- 免疫学
- 胃腸内科
- 幹細胞生物学
背景:
- 損傷後の臓器機能には 腸内皮質の再生が不可欠です
- 腸幹細胞 (ISC) のニッチは,特定のシグナル伝達経路を通じて正常な上皮質の維持を制御する.
- 腸内損傷後のISCコンパートメントの調節は,まだ完全に理解されていません.
研究 の 目的:
- 腸内皮質再生における先天性リンパ球 (ILC) とインタールキン22 (IL-22) の役割を調査する.
- IL-22が腸の幹細胞 (ISC) に影響し,組織修復を促進するメカニズムを解明する.
主な方法:
- 成長を評価するために,ex vivo腸内オーガノイド培養 (マウスとヒト) を使用した.
- リコンビネントIL-22はオルガノイドとインビボモデルに適用された.
- STAT3のリン酸化とATOH1欠乏は,IL-22の効果に関連して分析された.
- 骨髄移植モデルを対象としたイン・ビボ試験.
主要な成果:
- ILC由来のIL-22は,IL-22に依存した方法でマウスの小腸オルガノイドの成長を著しく増加させた.
- リコンビネントIL-22は,マウスとヒトのオーガノイドの両方でISCの増殖と拡張を直接促進しました.
- IL-22はLgr5 ((+) ISCにおけるSTAT3酸化を誘導し,これはオルガノイド形成と再生に不可欠であった.
- 移植対宿主疾患モデルでは,インビオIL-22治療によりISCの回復,上皮の再生,および病理の減少が改善された.
結論:
- 生まれながらのリンパ性細胞 (ILC) によって生成されるインタールイキン-22 (IL-22) は,腸内上皮再生をサポートする重要な免疫媒介体である.
- IL-22は,STAT3信号伝達を通じて腸内幹細胞 (ISC) を直接活性化し,パネス細胞とは独立して増殖と修復を促進します.
- この研究では 腸の治癒と病気の重症度の軽減に不可欠な 免疫細胞と幹細胞の通信経路が明らかになりました
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