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OX2 (CD200) との相互作用により,マクロファージ系統のダウン調節
R M Hoek1, S R Ruuls, C A Murphy
1DNAX Research Institute of Molecular and Cellular Biology, 901 California Avenue, Palo Alto, CA 94304, USA.
Science (New York, N.Y.)
|December 2, 2000
まとめ
この研究では,OX2 (CD200) がマクロファージ系統細胞にとって重要な抑制信号として作用することを明らかにした. 欠乏すると,免疫反応が強くなり,EAEやCIAなどの炎症性疾患に対する感受性が高まります.
科学分野:
- 免疫学 免疫学とは
- 神経科学は神経科学である.
- 分子生物学は分子生物学である.
背景:
- OX2 (CD200) は,細胞シグナル伝達に関与する広く発現する膜グリコタンパク質です.
- マクロファージの系統,特に脳内のマイクログリアの調節におけるCD200の役割は,現在調査中です.
研究 の 目的:
- OX2 (CD200) がマクロファージの系統細胞を調節する機能を調べる.
- CD200欠乏が神経炎症や自己免疫疾患に与える影響を判断する.
主な方法:
- CD200欠乏マウスモデルを利用した.
- 検査されたマクロファージとマイクログリアのフェノタイプと数.
- 試験的な自己免疫性脳内炎 (EAE) とコラーゲン誘発性関節炎 (CIA) モデルでの疾患発症と重症度の評価.
主要な成果:
- CD200欠乏症は,活性化されたフェノタイプと,マイクログリアを含むマクロファージ系細胞の数の増加をもたらしました.
- CD200欠乏マウスにおける顔面神経の切断は,マイクログリアル応答の加速を示した.
- CD200の欠乏は,EAEの発症を早め,耐性マウスのCIAに対する感受性を高めました.
結論:
- OX2 (CD200) は,様々な組織にわたるマクロファージの系統に阻害信号を送る.
- CD200は免疫反応を調節し,自己免疫疾患を予防する上で重要な役割を果たします.
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