Nlrp6は腸内抗ウイルス免疫を調節する
Penghua Wang1, Shu Zhu2, Long Yang1
1Section of Infectious Diseases, Yale University School of Medicine, 300 Cedar Street, New Haven, CT 06510, USA. Department of Microbiology and Immunology, New York Medical College, Valhalla, NY 10595, USA.
まとめ
核酸結合オリゴメリゼーションドメイン型受容体6 (Nlrp6) は,腸内のウイルスRNAセンサーとして作用する. 腸内ウイルス感染症の制御に不可欠な抗ウイルス防御を誘発するために Dhx15 と連携します
科学分野:
- 免疫学
- ウイルス学
- 胃腸内科
背景:
- ヌクレオチド結合オリゴメリゼーションドメイン型受容体6 (Nlrp6) は,腸内微生物群のホメオスタシスと抗菌免疫を調節することが知られている.
- 特に腸内ウイルスに対する抗ウイルス免疫におけるその役割は,まだ十分に理解されていない.
研究 の 目的:
- 腸内ウイルス感染症の文脈でNlrp6の機能を調査する.
- Nlrp6が胃腸内でのウイルスの複製を制御する分子メカニズムを解明する.
主な方法:
- Nlrp6ノックアウト (Nlrp6(-/-)) と,脳髄膜炎ウイルスとネズミノロウイルス1による全身または口腔感染後の対照マウスの比較分析.
- Nlrp6, Dhx15,ミトコンドリア抗ウイルスシグナルタンパク質 (MAVS) を含む死亡率,ウイルス負荷,ウイルス病および分子経路の評価.
主要な成果:
- Nlrp6 ((-/-) マウスは,全身性ウイルス感染後に対照群と同様の死亡率を示したが,胃腸のウイルス負荷は増加した.
- 経口感染は,対照群と比較して,Nlrp6 ((-/ -)) のマウスの死亡率とウイルス病の増加をもたらした.
- Nlrp6は,Dhx15経由でウイルスRNAを結合し,MAVSと相互作用して,タイプI/IIIインターフェロン (IFN) とIFN刺激遺伝子 (ISG) を誘導することが確認された.
結論:
- Nlrp6はDhx15と働き,腸内における重要なウイルスRNAセンサとして機能する.
- このNlrp6-Dhx15軸は,IFN刺激遺伝子を誘導し,腸内ウイルス感染症を制御するために不可欠です.
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