骨髄増殖性腫瘍の生歴は,系統学から推測される
Nicholas Williams1, Joe Lee1,2, Emily Mitchell1,2,3,4
1Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, UK.
Nature
|January 21, 2022
まとめ
癌を誘発する突然変異は 骨髄増殖性腫瘍では 生まれてからずっと早い段階で起こります これらの早期変異は 診断前に何十年ものクローン成長につながり 早期介入の新たな道を開きます
科学分野:
- 血液学
- 遺伝学
- 癌 生物学
背景:
- 骨髄増殖性腫瘍 (MPN) のドライバ変異とクローン進化の正確なタイミングは,まだ十分に理解されていません.
- 現存する知識の不足は,MPNに対する効果的な早期発見と介入戦略の開発を妨げています.
研究 の 目的:
- クローン経歴を再構築し,MPNのドライバー変異のタイミングを決定する.
- 早期の遺伝的イベント,クローンダイナミクス,MPNにおける疾患の潜伏期間の関係を調査する.
主な方法:
- 12人のMPN患者からの1,013のクローナルの血液形成コロニーの全ゲノム配列決定.
- クローン履歴と突然変異の獲得タイミングを決定する 系統遺伝再構築
- JAK2,DNMT3A,PPM1D変異を含む体内の変異の分析
主要な成果:
- ドライバの変異は子宮内を含む生命の初期に頻繁に得られた.
- JAK2V617F変異は妊娠33週から10.8歳の間に得られた.
- DNMT3AとPPM1Dの変異も発達初期に得られた.
- JAK2V617Fの取得と診断の間に,30年 (範囲11~54年) の有意な遅延が観察されました.
- クロンの膨張率は著しく変化し,追加の原動力変異によって増加した.
結論:
- 大人のMPNは,早期のドライバー変異の獲得と生涯のクローン進化によって支えられています.
- 長い潜伏期間は早期発見と介入の機会を提供します.
- この研究は,早期の遺伝現象と後のクローンダイナミクスを強調して,がん発達の新しいモデルを提案しています.
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