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Isolation and In Vitro Culture of Murine and Human Alveolar Macrophages
Published on: April 20, 2018
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セシルアルベオラマクロファージは,アルベオラ上皮質と通信し,免疫を調節する
Kristin Westphalen1, Galina A Gusarova1, Mohammad N Islam1
1Lung Biology Laboratory, Department of Medicine, Division of Pulmonary, Allergy and Critical Care, Columbia University Medical Center, New York, New York 10032, USA.
Nature
|January 28, 2014
まとめ
レジデントアルベオラマクロファージ (AMs) は,ギャップ・ジャンクションを通じて伝達し,肺炎を抑制する. コネクシン43 (Cx43) を含むこの新しい経路は,細菌感染中に過剰な免疫反応と潜在的な組織損傷を防ぐ.
科学分野:
- 免疫学 免疫学とは
- 細胞生物学 細胞生物学
- 肺内医学 肺内医学 肺内医学
背景:
- 組織に居住するマクロファージは,バリア器官における宿主の防御に不可欠です.
- 肺内のアルベオラマクロファージ (AMs) は,吸入された病原体に対する哨兵として作用します.
- AMsによって引き起こされる炎症反応は,潜在的に組織損傷を引き起こし,規制メカニズムを必要とします.
研究 の 目的:
- アルベオラマクロファージ (AMs) がどのように炎症反応を調節し,肺組織損傷を予防するかを調査する.
- AMsによって採用される免疫調節の新しいメカニズムを特定する.
主な方法:
- リアルタイム・イン・シット・アルベオラ画像を用いて,マクロファージと表皮の相互作用を観察した.
- AMにおけるコネキシン43 (Cx43) の発現と機能を評価した.
- AM特有のノックアウトモデルは,Cx43.3の役割を研究するために使用されました.
- カルシウム (Ca2+) 波の伝播とシグナル伝達経路 (例えば,Akt) は,炎症の間に分析されました.
主要な成果:
- AMsのサブセットは,Cx43.3を含む,アルベオラ上皮質とのギャップ・ジャンクション・チャネルを形成する.
- リポポリサッカリド誘発の炎症の間,これらのAMは付着し,表皮を介して同期されたCa2+波を通じて伝達された.
- この相互通信は,Ca2+に依存するAktの活性化を含む免疫抑制作用があることが判明しました.
- AMにおけるCx43のノックアウトは,中性粒子の徴募と炎症誘発性サイトカインの分泌の増加につながった.
結論:
- 新しい免疫調節メカニズムが存在し,アルベオールに付着したAMはCx43を含むギャップジャンクションを使用して免疫抑制信号を伝達します.
- このAM-表皮伝達経路は,エンドトキシン誘発の肺炎を緩和し,過剰な組織損傷を防ぐのに役立ちます.
- この経路をターゲットにすることで,炎症性肺疾患に対する新しい治療戦略を提供することができる.
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