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Mouse Naïve CD4+ T Cell Isolation and In vitro Differentiation into T Cell Subsets
Published on: April 16, 2015
IkappaBzetaは,ROR核受容体との協力により,T(H) 17の開発を規制しています
Kazuo Okamoto1, Yoshiko Iwai, Masatsugu Oh-Hora
1Department of Cell Signaling, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Japan.
Nature
|April 13, 2010
まとめ
新しい転写因子であるIkappaBzetaは,インタールイキン17を産生するヘルパーT (T (H)) 17細胞の発達に不可欠です. この発見は,実験的自己免疫脳内炎 (EAE) のような自己免疫疾患に対する新しい治療戦略を提供します.
科学分野:
- 免疫学 免疫学とは
- 分子生物学は分子生物学である.
- 細胞生物学 細胞生物学
背景:
- Tヘルパー17 (T(H) 17細胞は,自己免疫疾患において重要な役割を果たします.
- T(H) 17細胞の発達は,IL-6とTGF-βによって誘発され,RORgammatとRORalphaが関与しています.
- RORgammatまたはRORalpha単独では,IL-6およびTGF-βなしでは,限られたIL-17の生成を可能にします.
研究 の 目的:
- T(H) 17細胞の発達を調節する新しい転写因子を特定する.
- T(H) 17の分化と自己免疫疾患におけるIkappaBzetaの役割を調査する.
- IL-17a遺伝子発現を制御する転写メカニズムを解説する.
主な方法:
- イカッパBゼータの胎外発現は,ナイブCD4 (((+)) T細胞で発生する.
- Nfkbiz ((-/-) マウスにおけるT(H) 17の発達に関する分析.
- 実験的な自己免疫性脳髄炎 (EAE) の誘導と評価.
- Nfkbiz (((-/-) CD4 (((+) T細胞をRag2 (((-/-) マウスに移植する.
- ChIPは,IkappaBzetaがIl17a遺伝子に結合することを評価するためのアッセイである.
主要な成果:
- IkappaBzetaは,RORgammatまたはRORalphaと共に,IL-6およびTGF-βなしでも,T(H) 17の開発を強力に誘導する.
- Nfkbiz(-/-) マウスは,T(H) 17の発達障害とEAEに対する抵抗を示しています.
- EAE耐性におけるIkappaBzetaのT細胞内在的機能は,細胞移転によって確認されました.
- IkappaBzetaは,Il17a遺伝子調節領域に直接結合し,RORsと連携してIL-17aの発現を高めます.
結論:
- IkappaBzetaは,T(H) 17細胞の発達に不可欠な重要な転写因子です.
- この研究は,T(H) 17の差異化に基礎を置く重要な転写メカニズムを明らかにしています.
- IkappaBzetaは,新しい自己免疫疾患の治療のための潜在的な分子標的を表しています.
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