新生自己免疫の中枢神経系の病変における髄膜血管構造とエフェクタールT細胞の相互作用
Ingo Bartholomäus1, Naoto Kawakami, Francesca Odoardi
1Max Planck Institute for Neurobiology, 82152 Martinsried, Germany.
Nature
|October 16, 2009
まとめ
エフェクターT細胞と呼ばれる免疫細胞は,血管をスキャンし,抗原を提示する細胞と相互作用することによって,脳を侵略します. このプロセスは,自己免疫疾患における炎症と組織損傷を引き起こします.
科学分野:
- 神経免疫学 神経免疫学とは
- 血管生物学 血管生物学
背景:
- 中枢神経系 (CNS) は,血脳障壁によって保護されていますが,免疫の攻撃に敏感です.
- 中枢神経系内の免疫細胞の相互作用を理解することは,神経炎症疾患の治療に不可欠です.
研究 の 目的:
- 実験的な自己免疫性脳内炎 (EAE) 中の脳血管系と組織との効果性T細胞のダイナミックな相互作用をリアルタイムで視覚化します.
- T細胞の監視,エクストラバゼーション,および中枢神経内の抗原を提示する細胞との相互作用の連続的なステップを解明する.
主な方法:
- EAEのルイスラットモデルにおける腸内2フォトンイメージング.
- 初期到着から疾患の発現までのエフェクターT細胞の行動のリアルタイム観察.
主要な成果:
- エフェクターT細胞は3つの平面を順次スキャンした:レプトメニンゲアル血管 (流動に反する光面),非光面の血管面,およびヘイプ膜.
- T細胞は,ハイプ膜に抗原 (ミエリンタンパク質を含む) を提示するファゴサイトと遭遇した.
- これらの相互作用は,T細胞を刺激して,炎症促進媒介体を産生させ,組織侵入と炎症性浸透を引き起こします.
結論:
- この研究は,自己免疫疾患の間に,中枢神経系内のT細胞の監視と活性化のダイナミックで多段階のプロセスを明らかにしています.
- レプトメニンゲアル膜のファゴサイトによる抗原プレゼンテーションは,T細胞の活性化と,その後の中枢神経の侵入のための重要なステップです.
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