MEX3CによるmRNA不安定化を調節する化学ツールとしてのDNAアプタマー
Tongqing Li1,2, Jingjing Qin1,2, Zihao Huang2,3
1College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310000, China.
ACS applied bio materials
|January 10, 2026
まとめ
研究者らはRNA結合タンパク質MEX3Cを標的とするDNAアプタマーMRiApt-PT-stemを開発した。このプローブは遺伝子発現を効果的に調節し、腫瘍抗原提示を回復させ、標的化不可能ながん遺伝子の標的化のための新しい戦略を提供する。
科学分野:
- 分子生物学
- がん研究
- 創薬
背景:
- RNA結合タンパク質(RBPs)はmRNAの代謝を通じて遺伝子発現を制御する。
- MEX3Cは転写産物を不安定化する腫瘍特異的RBPである。
- MEX3Cを標的とする選択的ツールは現在利用できない。
研究 の 目的:
- 高親和性DNAアプタマーMEX3Cを開発すること。
- MEX3C活性を調節するための化学プローブを作成すること。
- がん予後におけるMEX3Cの役割を調査すること。
主な方法:
- 反復ブロッカーSELEX選択および配列最適化。
- アプタマー結合親和性および特異性の特徴付け。
- 細胞ベースのアッセイおよびTCGAデータ分析におけるアプタマー有効性の評価。
主要な成果:
- 高親和性DNAアプタマーMRiAptがMEX3CのKH1ドメインを標的として開発された。
- 安定化誘導体MRiApt-PT-stemは、安定性と細胞内取り込みを強化した。
- MRiApt-PT-stemはMEX3Cを拮抗させ、HLA-A2発現を回復させ、T細胞認識を改善した。
- 高MEX3C発現は肝細胞癌における予後不良と相関していた。
結論:
- MRiApt-PT-stemはMEX3Cの研究のための貴重な化学プローブとして機能する。
- このアプタマーはMEX3C媒介性の転写後調節の調節を可能にする。
- 本研究結果は、がん治療および転写調節のためのMEX3CのようなRBPの標的化を支持する。
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