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免疫とコレステロールの交差点にある従来型のデンドリート細胞は,動脈硬化症におけるホメオスタシスである
Emmanuel L Gautier1, Thierry Huby, Flora Saint-Charles
1INSERM UMR-S U939, Hôpital de la Pitié, Paris, France.
Circulation
|April 22, 2009
まとめ
デンドリット細胞 (DCs) は,免疫反応とコレステロールレベルに影響を与えることで,動脈硬化に重要な役割を果たします. DCの寿命を延ばすことで,予期せぬほどコレステロールが低下し,この複雑な疾患における保護的役割が示唆されている.
科学分野:
- 免疫学 免疫学とは
- 心血管科学の研究について
- 動脈硬化症の病原性 病原性
背景:
- 免疫炎症的メカニズムは,動脈硬化症の中心にある.
- 免疫細胞の二極化は,プロアテロゲンまたはアンチアテロゲン的な結果を決定する.
- デンドリット細胞 (DCs) は免疫反応と耐性を調節しますが,動脈硬化症におけるその役割は不明です.
研究 の 目的:
- 動脈硬化症における従来の樹状細胞 (DCs) の役割を定義する.
- DCの寿命と免疫原性の調節がアテロゲネシスにどのように影響するかを調査する.
- DC,免疫反応,コレステロールの恒常性との関係を調査する.
主な方法:
- CD11cプロモーター駆動のhBcl-2過剰発現を用いて,DC寿命と免疫性 (DC-hBcl2マウス) を強化したマウスモデルを作成しました.
- 低密度リポプロテイン受容体欠乏症またはアポリポプロテインE欠乏症の背景でDC-hBcl2マウスを研究した.
- 高脂血症のマウスにおいて,コレステロレミアに対するDCの影響を評価するために,DCの減少.
主要な成果:
- DC-hBcl2マウスの拡張されたDC群は,T細胞活性化,Tヘルパー1/17サイトカインプロファイル,酸化特異性エピトープに対する自己抗体の増加を示した.
- プロアテロゲン性免疫シグネチャーにもかかわらず,DC膨張はパラドックス的に,血コレステロール値の低下とプラークの進行の加速と関連していました.
- 超脂血症のマウスのDC減少はコレステロール血量増加につながり,DCレベルとコレステロールの調節の間の関連性を支持しています.
結論:
- 従来のDCは,動脈硬化プロセスに不可欠です.
- DCは,コレステロールのホメオスタシスと動脈硬化症における免疫応答の両方を調節することに直接関与しています.
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