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Updated: Sep 9, 2025

Imaging InlC Secretion to Investigate Cellular Infection by the Bacterial Pathogen Listeria monocytogenes

Imaging InlC Secretion to Investigate Cellular Infection by the Bacterial Pathogen Listeria monocytogenes

Published on: September 19, 2013

カルパイン-2は,細胞内細菌Listeria monocytogenesの感染を促進し,窒素酸化物のホメオスタシスを損なうことで腸内免疫バリアを侵す

Bo Yao¹, Jingru Wang², Dingyu Hou²

¹College of Life Science and Technology, State Key Laboratory of Bioactive Molecules and Druggability Assessment, Jinan University, Guangzhou 510632, China; Department of General Practice, The Fifth Affiliated Hospital of Southern Medical University, Guangzhou 510900, China.

Journal of advanced research

|August 30, 2025

まとめ

カルパイン-2 (CAPN2) は,腸内免疫バリアの窒素酸化物 (NO) ホメオスタシスを破壊することによって,リステリア・モノサイトゲネスの侵入を容易にする. CAPN2をターゲットにすることで,細胞内細菌感染を防ぐことができます.

科学分野:

免疫学
微生物学
生物化学

背景:

カルパイン (CAPN1およびCAPN2) は,様々な生理学的および病理学的プロセスに関与する酵素である.
CAPN2は細胞内細菌の感染と侵入を制御する役割を果たしますが,そのメカニズムは完全に理解されていません.

研究の目的:

Listeria monocytogenes (L. monocytogenes) の感染における腸内CAPN2の役割を調査する.
L.monocytogenes が,窒素酸化物 (NO) ホメオスタシスを損なうことにより,ペイヤー・パッチ経由で腸内免疫バリアに侵入するメカニズムを解明する.

主な方法:

カルパスタチン (CAST) を欠いたか,CAPN2阻害剤 (CAPN2-Inh) で治療されたマウスのL. monocytogenes感染モデル.
L. monocytogenesの侵入,CAPN2の活性化,および誘導性酸化窒素合成酵素 (iNOS) ノックアウトマウスによるNO依存性の調査.
NO産生,L.monocytogenes感染,およびフローサイトメトリーおよび光追跡を用いたマクロファージの細胞間伝播の分析.

主要な成果:

CAPN2の活性化と発現は,L. monocytogenes感染中に動的であった.
CAPN2は,iNOS媒介によるNO生成を調節し,NOホメオスタシスを阻害し,L. monocytogenesが腸内免疫バリアに侵入することを促進する.
CAPN2抑制またはNOシグナル伝達抑制は,マクロファージにおけるL. monocytogenesの増殖と細胞間拡散を減少させた.

結論:

CAPN2の活性化により,L. monocytogenesの侵入が NO依存メカニズムによって容易になる.
L. monocytogenesのような細胞内細菌感染を予防する治療的可能性を提示しています.

キーワード:

カルパイン2 カルパスタチン細胞内細菌感染リステリア・モノサイトゲネス窒素酸化物ペイヤーズ・パッチ

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