インタールイウキン22は,腸の幹細胞を遺伝子毒性ストレスから保護する
Konrad Gronke1,2,3,4,5,6, Pedro P Hernández5,6,7, Jakob Zimmermann5
1Laboratory of Innate Immunity, Department of Microbiology, Infectious Diseases and Immunology, Charité-Universitätsmedizin Berlin, Berlin, Germany.
Nature
|February 1, 2019
まとめ
ゲノトキシンに対するDNAダメージ応答 (DDR) を開始するために,インタールイキン-22 (IL-22) は不可欠です. 食事から得られる化合物はIL-22を調節し,ゲノムの完全性を保護し,結腸癌を予防します.
科学分野:
- 免疫学
- 遺伝学
- 胃腸内科
背景:
- 環境中の遺伝子毒は 皮質幹細胞のゲノム整合性を脅かし 癌を引き起こす可能性があります
- DNAダメージ応答 (DDR) 経路は,幹細胞のゲノム安定性を維持するために不可欠です.
- インタールイウキン22 (IL-22) は,先天性リンパ性細胞 (ILC3) と γδ T 細胞によって生成されるサイトカインです.
研究 の 目的:
- 腸内皮質幹細胞におけるDDRの調節におけるIL-22の役割を調査する.
- IL-22 産生と DDR に影響する食事要因とシグナル伝達経路を特定する.
主な方法:
- コロン幹細胞における条件付きIL-22受容体不活性化のための新しいマウスモデルを使用した.
- 遺伝子毒性被曝後のDDR発現,変異の蓄積,がんの発症を評価した.
- アリル炭化水素受容体 (AhR) のシグナル伝達とグルコシノレート代謝物の役割を調査した.
主要な成果:
- IL - 22は,DNA損傷時に腸内皮質幹細胞のDDRを開始するために不可欠です.
- IL- 22欠乏した幹細胞は,アポトーシスの障害,変異の増加,大腸がんに対するより高い感受性を示した.
- 食中のグルコシノレート代謝物は,AhRリガンドとして作用し,先天性リンパ球によるIL-22の産生を刺激する.
結論:
- 食事による遺伝子毒素のAhR感知と,その後のIL-22生成を含むホメオスタティックネットワークは,幹細胞のゲノム完全性を保護する.
- IL-22は,上皮幹細胞のDDR成分を直接調節し,遺伝子毒性ストレスに対する重要な防御を提供します.
- この経路は 腸内の食事と免疫 癌の予防を結びつけるメカニズムを 強調しています
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