エアロビック・グリコロシスは,表遺伝的メカニズムを通じてTヘルパー1細胞の分化を促進する
Min Peng1, Na Yin1, Sagar Chhangawala2
1Immunology Program, Memorial Sloan Kettering Cancer Center (MSKCC), New York, NY 10065, USA.
まとめ
乳酸脱水酵素A (LDHA) は,T細胞の代謝をサポートし,表遺伝的変化によってインターフェロン-ガンマ (IFN-γ) の生成を促進します. T細胞におけるLDHAを抑制することで,過剰なIFN-γ誘発の炎症や自己免疫疾患を防ぐことができます.
科学分野:
- 免疫学
- 代謝経路
- エピジェネティクス
背景:
- 活性化されたT細胞の特徴である.
- この代謝状態は,インターフェロン・ガンマ (IFN-γ) の生成を含む,エフェクターT細胞の反応の強化と関連している.
- 以前の理解では,3' 未翻訳領域 (3' UTR) 媒介メカニズムがこのプロセスの鍵であった.
研究 の 目的:
- T細胞の活性化とIFN-γ生成における乳酸脱水酵素A (LDHA) の役割を調査する.
- LDHAがエフェクターT細胞の反応に影響を与えるメカニズムを解明する.
- 炎症性疾患におけるLDHAを標的とした治療の可能性を調査する.
主な方法:
- LDHAを活性化されたT細胞に誘導する.
- 有酸素糖解とIFN-γ発現の評価
- アセチルコエンザイムA濃度とヒストンのアセチル化分析
- マウスモデルにおけるT細胞におけるLDHAの遺伝子消去.
- マウスモデルでの免疫病理学的評価
主要な成果:
- LDHAは活性化されたT細胞で誘発され,有酸素糖分解をサポートします.
- LDHAは3'UTRメカニズムとは独立してIFN-γ発現を促進する.
- LDHAはアセチル共酵素Aを増加させ,ヒストンのアセチル化とIfngの転写を促進する.
- IFN-γ誘発の免疫病変とT細胞欠乏に関する問題から保護されたマウスにおけるLDHAの消去.
結論:
- LDHAは,エフェクターT細胞の分化を促進する上で重要な役割を果たします.
- LDHAによってサポートされるエアロビック・グリコロシスは,遺伝子転写を調節することによってT細胞の反応を高めます.
- LDHAは,過剰なIFN-γによって特徴づけられる自己炎症性疾患の潜在的治療標的である.
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