miR-361-5pは,SLPI/ NF-κBシグナル伝達経路を媒介することによって,急性感染症内膜炎を調節する.
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PubMedで要約を見る
まとめ
この要約は機械生成です。miR- 361 - 5pの抑制は,分泌白血球タンパク質酵素阻害剤 (SLPI) を増加させ,NF- kB経路を阻害することによって,急性感染症性内心炎 (AIE) に対して保護します. この発見はAIE治療のための新しい治療戦略を提供します.
科学分野
- 心血管生物学
- 分子医学
- 感染症
背景
- 急性感染症内膜炎 (AIE) は,内膜炎の炎症と植生形成を伴うもので,しばしばStaphylococcus aureus (SA) 感染症に関連している.
- AIEの病原性におけるmicroRNA-361-5p (miR-361-5p) と分泌白血球プロテアゼ阻害剤 (SLPI) の特定の役割は,ほとんど未定義のままである.
- SA感染と低酸素はAIEの発症の重要な要因であり,心臓細胞と機能に影響します.
研究 の 目的
- Staphylococcus aureusによって引き起こされる急性感染症内膜炎におけるmiR-361-5pとSLPIの機能的役割と分子メカニズムを解明する.
- miR- 361 - 5pとSLPIの相互作用と,心臓細胞の生存能力,アポトーシス,炎症反応に対するそれらの結合効果を調査する.
- 確立されたAIEモデルにおけるmiR-361-5pレベルを調節する治療の可能性を評価する.
主な方法
- 低酸素とSA感染を受けたAC16細胞を用いたAIE細胞モデルとAIEラットモデルを作成.
- miR- 361-5pとSLPIの標的相互作用を確認するための二重ルシフェラーゼアッセイ.
- RT-qPCR,ウエスタンブラット,CCK-8,フローサイトメトリー,ELISA,H&E染色,および分子および細胞変化を分析するためのTUNEL染色を含む定量評価.
主要な成果
- miR-361-5pはAIEモデルで上位に規制され,SLPIは下位に規制された. miR-361-5pは直接SLPIをターゲットとしています.
- in vitroでは,miR- 361-5pはアポトーシスと炎症 (CK- MB,cTnT,IL- 1β,TNF- αの上昇) を促進し,NF- kBp65シグナリングを活性化したが,SLPI過剰表現またはmiR- 361-5pのノックダウンはこれらの効果を逆転させた.
- vivoでは,miR-361-5pのノックダウンは,AIEのラットにおける弁の植生,心筋のアポトーシス,および心臓損傷マーカーを減少させた.
結論
- miR- 361 - 5pのダウンレギュレーションは,SLPIをアップレギュレーションし,NF- kBp65シグナル伝達経路を阻害することによって,AIEに保護効果を発揮する.
- miR-361-5p/SLPI軸は,AIEの病原性における重要な規制メカニズムを表しています.
- miR-361-5pを標的とした治療は,急性感染症内臓炎の管理に有望な治療戦略です.
関連する概念動画
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