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LTβRシグナリングの阻害は,肺におけるWNT誘発再生を活性化します
Thomas M Conlon1, Gerrit John-Schuster1, Danijela Heide2
1Comprehensive Pneumology Center (CPC), Institute of Lung Biology and Disease, Helmholtz Zentrum München, Member of the German Center for Lung Research (DZL), Neuherberg, Germany.
Nature
|November 5, 2020
まとめ
リンフォトキシンβ受容体 (LTβR) 信号をターゲットにすることで,慢性肺炎と損傷を治療できます. LTβRを阻害すると,三次リンパ性構造が阻害され,細胞死が防止され,COPDモデルにおける肺組織再生が促進される.
科学分野:
- 免疫学
- 肺科
- 細胞生物学
背景:
- リンパトキシンβ受容体 (LTβR) のシグナリングは,慢性炎症疾患に関連したリンパ性新生および三次リンパ性構造を駆動する.
- 肺損傷におけるLTβRの役割,その調節メカニズム,および慢性閉塞性肺疾患 (COPD) の治療の可能性は不明である.
研究 の 目的:
- 喫煙に関連する肺疾患におけるLTβRシグナリングを調査する.
- LTβRによる肺病変の仕組みを解明する.
- COPDモデルにおけるLTβR阻害の治療効果を評価する.
主な方法:
- COPD患者およびタバコの煙にさらされたマウスの肺組織におけるLTβRリガンド発現とシグナル伝達経路の分析.
- 皮質細胞における非正規のNF-κBとTGFβ信号の評価
- マウスモデルにおけるLTβR阻害の影響,肺再生,線維症,筋肉衰弱の評価.
主要な成果:
- 喫煙に関連したCOPDの肺では,LTβRリガンドの増加,非正規のNF- kBシグナル伝達,およびLTβR標的遺伝子発現が観察されました.
- ネズミのLTβR阻害は,誘導可能な支障管関連リンパ性組織を破壊し,肺の再生を促進し,呼吸道線維症と筋肉の衰えを逆転させた.
- 機械的に,LTβR阻害は,上皮のNF- kB活性化,TGFβシグナル伝達,およびアポトーシスを減少させ,同時にアルベオラの原始細胞におけるWNT/β- カテニンのシグナル伝達を活性化させた.
結論:
- LTβR信号は慢性肺炎とCOPDにおける組織損傷に重大な役割を果たします.
- LTβRシグナリングの治療抑制は,COPDの治療に有望な戦略を提供します.
- LTβR阻害は,肺修復のための組織再生特性と抗炎症効果を組み合わせています.
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