ガッシャー病におけるグルコシルセラミドの蓄積と組織炎症を促す
Manoj K Pandey1, Thomas A Burrow1, Reena Rani2
1Division of Human Genetics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio 45229, USA.
Nature
|February 23, 2017
まとめ
ガッシャー病は,グルコシルセラミド (GC) の蓄積と炎症を伴う. 補足C5a/C5aR1の活性化がこのサイクルを駆動し,Gaucher病の潜在的な治療法としてC5aR1を標的にすることを示唆しています.
科学分野:
- 免疫学
- 遺伝学
- 生物化学
背景:
- ガッシャー病はGBA1変異によって生じ,免疫細胞にグルコシルセラミド (GC) が蓄積され,慢性炎症を引き起こします.
- ガッシャー病における過剰なGCと組織炎症の関連性は完全に理解されていません.
研究 の 目的:
- ガッシャー病の病原性における補完体活性化,特にC5aおよびC5a受容体1 (C5aR1) の役割を調査する.
- ガッシャー病の潜在的治療標的としてC5aR1を調査する.
主な方法:
- GCase欠乏したマウスを研究し,GCaseの活性が薬理的に抑制された.
- コンプリメントの活性化,GCの蓄積,炎症,自己抗体形成を分析した.
- C5aR1欠乏症または抑制が病気のアウトカムに与える影響を調査した.
主要な成果:
- GCASE欠乏症または抑制は,重要な補完体の活性化,GCの蓄積,炎症,およびサイトカインの生成を引き起こしました.
- GCaseとC5aR1の両方が欠けているマウス,または抑制されたC5aRを持つ野生型のマウスは,保護を示し,生存しました.
- C5a生成とC5aR1活性化を促し,GCの蓄積と免疫細胞の活性化を維持する.
結論:
- 補足C5a/C5aR1経路の活性化は,ゴッシャー病におけるGC蓄積と炎症の主要な要因である.
- C5aR1を標的にすることは,ガウッシャー病および潜在的に他の溶解体貯蔵障害のための新しい治療戦略を提供することができる.
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