マスト細胞は,T細胞の調節性耐性における重要な中間体である
Li-Fan Lu1, Evan F Lind, David C Gondek
1Department of Microbiology & Immunology, Dartmouth Medical School and the Norris Cotton Cancer Center, Lebanon, New Hampshire 03756, USA.
Nature
|August 22, 2006
まとめ
マスト細胞は,アレルギーにおける役割とは対照的に,T細胞依存性免疫耐性調節において極めて重要です. 調節性T細胞は,IL-9経由でマスト細胞を活性化させ,地域の免疫抑制とアロ移植耐性を媒介する.
科学分野:
- 免疫学 免疫学とは
- 移植免疫学について
背景:
- マスト細胞は,アレルギー状態におけるプロ炎症反応と典型的に関連しています.
- 調節性T細胞 (T(Reg)) は,周辺の免疫耐性を維持する上で重要な役割を果たします.
研究 の 目的:
- 調節性T (T(Reg)) 細胞依存の周辺耐性におけるマスト細胞の役割を調査する.
- アロインプラント耐性の文脈でT ((Reg)) 細胞がマスト細胞に影響を与えるメカニズムを解明する.
主な方法:
- 耐性アロ移植における遺伝子発現の分析.
- マスト細胞不足のマウスのアロインプラント耐性の誘導.
- T ((Reg)) 細胞によって生成されるインタールイキン-9 (IL-9) レベルを測定する.
- IL-9の中和は,アロインプラントの拒絶への影響を評価するために.
- T ((Reg) -IL-9 マスト細胞の相互作用の免疫ヒスト化学分析.
主要な成果:
- 耐性のあるアロ移植は,マスト細胞産物によって支配される遺伝子発現パターンを表します.
- マスト細胞は,マスト細胞不足のマウスで実証されたように,アロ移植の耐性を誘発するために不可欠です.
- 活性化されたT ((Reg) 細胞は,マスト細胞の成長と活性化因子であるIL-9の高いレベルを生成します.
- IL-9は,耐性組織内のマスト細胞の募集と活性化を媒介する.
- IL-9の中和は,耐性マウスのアロインプラント拒絶を加速する.
- 耐性アロ移植体内で,新しいT(Reg) -IL-9マスト細胞軸が特定されました.
結論:
- マスト細胞は,T ((Reg) 細胞媒介の周辺耐性にとって不可欠であり,従来の炎症促進作用に異議を唱える.
- T(Reg) -IL-9マスト細胞軸は,地域免疫抑制を達成し,アロインプラント耐性を維持するための重要なメカニズムです.
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