人体T細胞における全ゲノムCRISPRスクリーンは,FOXP3のレギュレータを明らかにする
Kelvin Y Chen1, Tatsuya Kibayashi2,3, Ambre Giguelay4,5
1Laboratory of Experimental Immunology, Immunology Frontier Research Center, Osaka University, Osaka, Japan. chenk@ifrec.osaka-u.ac.jp.
Nature
|March 27, 2025
まとめ
調節性T細胞は免疫バランスと自己免疫疾患の治療に不可欠です. この研究は,RBPJ-NCOR複合体を重要な調節体として特定し,RBPJ除去されたTreg細胞が安定性と治療可能性を高めることを明らかにしました.
科学分野:
- 免疫学
- 細胞生物学
- 遺伝子規制
背景:
- FOXP3発現によって定義される調節性T細胞は,免疫耐性およびホメオスタシスに不可欠です.
- インビトロで誘導されたTreg (iTreg) 細胞を生成する現在の方法は,細胞の安定性に問題があり,自己免疫疾患の治療用途を制限しています.
- Tregの分化を制御する遺伝ネットワークを理解することは,より効果的な細胞ベースの治療法の開発に不可欠です.
研究 の 目的:
- 人間のT細胞におけるFOXP3誘導に影響を与える新しい遺伝子調節因子を特定する.
- iTreg 細胞の分化,安定性,機能における特定されたレギュレータの役割を特徴付ける.
- 自己免疫疾患の臨床前モデルにおけるこれらのレギュレータの操作の治療の可能性を評価する.
主な方法:
- ヒトT細胞における全ゲノムCRISPR機能喪失を検知し,FOXP3調節遺伝子を特定する.
- Perturb-seq (Perturb-icCITE-seq) は,遺伝子変異の単細胞解像度分析のためのものです.
- iTreg細胞のインビトロ誘導と,その安定性と機能の評価.
- 移植対宿主疾患のヒト化したマウスモデルにおけるRBPJ除去されたiTreg細胞の体内評価.
主要な成果:
- RBPJ-NCOR抑制複合体は,FOXP3発現の新規の負の調節剤として特定されました.
- RBPJのノックアウトは,FOXP3増強物質CNS2のDNA脱メチル化によるFOXP3発現を促進し,iTreg細胞の分化と機能を強化した.
- RBPJ欠乏は,iTreg細胞の表型安定性を高めました.
- RBPJの過剰発現は,HDAC3経由でFOXP3ヒストンのアセチル化を調節することによってFOXP3誘導を抑制した.
- RBPJで消去されたiTreg細胞は,ヒト化したマウスモデルで異種移植対宿主疾患の優れた抑制を示した.
結論:
- RBPJ-NCOR複合体は,FOXP3誘導とiTreg細胞の安定性の重要な,文脈特有の調節体である.
- RBPJをターゲットにすることで,自己免疫疾患に対するiTreg細胞ベースの治療の有効性を高める有望な戦略が提供されます.
- これらの発見は,FOXP3の調節メカニズムに関する新しい洞察を提供し,採用細胞治療の可能性を高めています.
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