cBAF複合体の成分とMYCは,CD8+ T細胞の早期に協力する
Ao Guo1, Hongling Huang1, Zhexin Zhu2
1Department of Immunology, St Jude Children's Research Hospital, Memphis, TN, USA.
Nature
|June 22, 2022
まとめ
研究者は,T細胞の運命を制御する重要な要因としてcBAF複合体を特定しました. cBAFを阻害すると,記憶T細胞 (Tmem) の生成が促進され,抗がん免疫療法の有効性が向上する.
科学分野:
- 免疫学
- 細胞生物学
- 分子生物学
背景:
- メモリーT細胞 (Tmem) の生成は,効果的なワクチン接種とがん免疫療法にとって極めて重要です.
- Tmem細胞の分化を制御する分子メカニズムを理解することは不可欠です.
研究 の 目的:
- Tmem細胞生成の新たなレギュレータを特定する.
- T細胞の分化における哺乳類の正規のBRG1/BRM関連因子 (cBAF) 複合体の役割を調査する.
主な方法:
- CRISPRベースの遺伝子スクリーンは,Tmem細胞生成のネガティブレギュレータを特定するためにin vivoです.
- CD8+T細胞の分化と非対称な細胞分裂の分析
- cBAF-MYCの相互作用とクロマチンの状況の評価
- マウスの固体腫瘍モデルでcBAF阻害剤を用いた in vivo有効性試験.
主要な成果:
- cBAF複合体の成分は,Tmem細胞生成の負の調節体として特定されました.
- cBAFの喪失は,活性化されたCD8+T細胞におけるTmem細胞形成を促進した.
- 最初のT細胞分裂中のcBAFとMYCの非対称な共分離は,TeffとTmemの細胞運命を決定する.
- cBAFとMYCの間の物理的な相互作用がクロマチンの風景を形成する.
- マウスモデルでは,T細胞活性化初期におけるcBAFの薬理学的抑制により,CAR- T細胞の有効性が強化された.
結論:
- cBAF複合体は,Tmem細胞運命を決定する負の決定因子として作用する.
- 早期のT細胞分化中にcBAFを標的とすることは,がん免疫療法の成果を改善するための有望な戦略です.
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