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Mouse Naïve CD4+ T Cell Isolation and In vitro Differentiation into T Cell Subsets
Published on: April 16, 2015
Tヘルパー2細胞系統へのコミットメントを制御するエピジェネティックサイレンシング経路
Rhys S Allan1, Elina Zueva, Florence Cammas
1Institut Curie Research Center, 26 rue d’Ulm, 75248 Paris Cedex 05, France.
Nature
|July 6, 2012
まとめ
SUV39H1H3K9me3HP1α経路は,Tヘルパー1 (TH1) 遺伝子を静止することによって,Tヘルパー2 (TH2) 細胞の安定性を維持する. この経路の喪失はTH1反応を促進し,アレルギー性喘息を悪化させる.
科学分野:
- 免疫学 免疫学とは
- エピジェネティクス エピジェネティクス
- 細胞生物学 細胞生物学
背景:
- ネイブCD4+T細胞は,免疫に不可欠な特殊なTヘルパー (TH) サブセット (TH1,TH2,TH17,Treg) に微分化します.
- エピジェネティックメカニズムはTH細胞の分化を調節しますが,系統の安定性におけるその役割は不明です.
- SUV39H1H3K9me3HP1α経路は,ヘテロクロマチン形成による転写静音化に関与しています.
研究 の 目的:
- Tヘルパー2 (TH2) 系統の安定性を維持するSUV39H1H3K9me3HP1α経路の役割を調査する.
- この経路がTH2細胞の他の系統への結合に影響を与えるかどうかを判断する.
主な方法:
- SUV39H1またはHP1αに欠けているTH2細胞を研究した.
- 評価されたヒストロン変異 (H3K9me3,H3K9ac) と,TH1遺伝子位置でのHP1α結合.
- TH1およびTH2細胞の遺伝子発現を微分化誘発条件下で分析した.
- TH2誘発性アレルギー性喘息のマウスモデルを使用して,in vivo関連性を評価しました.
主要な成果:
- SUV39H1欠乏症は,H3K9のトリメチル化/アセチル化比を低下させ,TH2細胞の静止されたTH1遺伝子プロモーターにHP1α結合を減少させた.
- SUV39H1またはHP1α欠乏のTH2細胞は,TH1誘発培養でTH1遺伝子を異常に発現する.
- In vivoでは,SUV39H1の抑制または喪失により,TH1へのT細胞応答がシフトし,アレルギー性喘息の病理性が低下しました.
結論:
- SUV39H1H3K9me3HP1α経路は,TH1ロシオをエピジェネティックに静止することによって,TH2系統の安定性を維持するために不可欠です.
- この経路は,アレルギー性喘息のようなTH2細胞媒介の炎症性疾患の潜在的治療標的である.
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