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広範囲にわたる内部ポリアデニレーションは,白血病における腫瘍抑制遺伝子を無効化する
Shih-Han Lee1, Irtisha Singh2,3, Sarah Tisdale1
1Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA.
Nature
|August 29, 2018
まとめ
異常なメッセンジャーRNA (mRNA) 処理,特に内性ポリアデニレーションは,慢性リンパ球性白血病 (CLL) の腫瘍抑制遺伝子を無効化する. このmRNA現象は 癌の進行を促す遺伝的変異よりも一般的です
科学分野:
- 分子生物学
- ガンゲノミクス
- トランスクリプトミクス
背景:
- DNA変異は 癌の発症の原動力として 確立されています
- 癌における遺伝的変異を模倣するRNAイベントの役割は,まだ調査中です.
研究 の 目的:
- 癌における上調されたmRNAイベントが,遺伝的変異を機能的に複製できるかどうかを調査する.
- 慢性リンパ球性白血病 (CLL) の内部ポリアデニレーションの有病率と影響を調査する.
主な方法:
- 59人のCLL患者の正常および悪性B細胞でRNA配列と3'- 末端配列を測定した.
- 分析は,特に内部ポリアデニレーションによる上調されたmRNAイベントの特定に焦点を当てた.
主要な成果:
- 主要なCLL細胞では,内部ポリアデニル化による切断されたmRNAとタンパク質の広範なアップレギュレーションが発見されました.
- これらの異常 mRNA イベントは,主に腫瘍抑制機能を持つ330の再発性遺伝子に影響しました.
- 切断されたタンパク質はしばしば腫瘍抑制機能を失ったり,DICER,FOXN3,CARD11,MGA,CHST11のような遺伝子に影響を及ぼしたりします.
結論:
- 異常なmRNA処理,特に内性ポリアデニレーションは,遺伝的イベントよりもCLLにおける腫瘍抑制遺伝子不活性化のより一般的なメカニズムである.
- 固体腫瘍における白血病およびDNA変異における内性ポリアデニレーションによって不活性化された新規候補腫瘍抑制遺伝子を特定した.
- 発見は,癌の総合的な診断と病原性の理解のために,遺伝子データを超えてmRNAイベントの分析の必要性を強調しています.
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