トランスクリプトームのゲノタイプ化によって結びついた体内変異と細胞同一性
Anna S Nam1,2,3, Kyu-Tae Kim2,3,4, Ronan Chaligne2,3,4
1Department of Pathology and Laboratory Medicine, Weill Cornell Medicine, New York, NY, USA.
Nature
|July 5, 2019
まとめ
トランスクリプトームの遺伝子型決定 (GoT) は,単細胞RNA配列決定と遺伝子型決定を統合することによって,がん細胞のトランスクリプトームをプロファイルします. この方法は,CALR変異が骨髄増殖性腫瘍における血液細胞発達の影響を明らかにします.
科学分野:
- ゲノミクス
- 血液学
- 分子生物学
背景:
- 特定の表面マーカーがないと悪性細胞と正常細胞を区別するのは難しい.
- 骨髄増殖性腫瘍 (MPN) の体内の変異は,正常な血液細胞の発達 (血液形成) を妨害する.
研究 の 目的:
- 悪性細胞のトランスクリプトミックのアイデンティティを定義するために,単細胞RNA配列化とゲノタイプを統合する方法を開発する.
- CALR変異がヒトの血液形成に及ぼす影響について,単細胞解像度で調べる.
主な方法:
- トランスクリプトームのゲノタイプ化 (GoT) を開発し,ゲノタイプ化とドロップレットベースの単細胞RNA配列化を組み合わせた新しい方法である.
- CALR変異のMPN患者の38,290個のCD34+細胞をプロファイルするためにGoTを適用しました.
- トランスクリプトの末端から離れた複数のターゲットとロキのゲノタイプにGoTを拡張した.
主要な成果:
- CALRが変異した細胞における 骨髄分化による身体能力の向上を特定した.
- 細胞のアイデンティティに依存するCALR変異の主要な結果として,展開されたタンパク質応答を明らかにした.
- NF-κB経路のアップレギュレーションは,特に未結合幹細胞で観察されました.
結論:
- MPNにおける体性変異の転写的結果は細胞同一性に依存する.
- GoTは複雑な生物系における細胞の異質性と変異の影響を解剖するための強力なツールを提供します.
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