調節性B細胞は,IL-21依存性同類相互作用を通じてT細胞の自己免疫を制御する
Ayumi Yoshizaki1, Tomomitsu Miyagaki, David J DiLillo
1Department of Immunology, Duke University Medical Center, Durham, North Carolina 27710, USA.
Nature
|October 16, 2012
まとめ
インタールイキン-10 (IL-10) を生成する調節性B細胞 (B10細胞) は,自己免疫疾患を抑制することができます. T細胞の相互作用とIL-21はB10細胞の機能に不可欠であり,潜在的な新しい治療法を提供します.
科学分野:
- 免疫学 免疫学とは
- 細胞生物学 細胞生物学
- 自己免疫とは,自己免疫である.
背景:
- B細胞は,主に抗体生成を通じて,免疫応答の重要な調節体である.
- 規制性B細胞 (B10細胞) と呼ばれる特定のB細胞サブセットは,インタールイキン-10 (IL-10) を分泌することによって免疫反応を抑制することができます.
- B10細胞は,マウスのT細胞に依存した自己免疫疾患の強力な調節者ですが,そのインビボの調節は完全に理解されていません.
研究 の 目的:
- B10細胞のIL-10産生と免疫調節を制御するメカニズムを in vivoで調査する.
- 自己免疫疾患の治療戦略として,ex vivoで拡張したB10細胞の可能性を調査する.
主な方法:
- B10細胞機能を研究するために多発性硬化症のマウスモデルを使用しました.
- B10細胞の成熟におけるIL-21とCD40依存型T細胞の相互作用の役割を調査した.
- CD40およびIL-21受容体信号を用いたB10細胞のex vivo拡張を行った.
- 拡張したB10細胞を,既定の自己免疫疾患を持つマウスに移植した.
主要な成果:
- B10細胞がIL-10を分泌するエフェクタ細胞に成熟するには,IL-21とCD40依存型T細胞の相性相互作用が必要です.
- CD40とIL-21受容体信号を用いたB10細胞のex vivo拡張により,400万倍の増加が示されました.
- 拡張したB10細胞の養子移植により,マウスの自身免疫疾患の症状が著しく抑制されました.
結論:
- IL-21とT細胞の相互作用は,IL-10を産生するB10細胞の発達と機能に不可欠である.
- 自体B10細胞のex vivo拡張と再注入は,重度の自己免疫疾患に対する有望な治療アプローチです.
- この戦略は,現在の治療法に耐性を持つ自己免疫疾患に対する新しい治療法を提供することができる.
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