APOBEC3Aとメソスケールゲノム特性によって引き起こされるがんにおける乗客ホットスポット変異
Rémi Buisson1,2, Adam Langenbucher1, Danae Bowen2
1Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA.
まとめ
多くの癌の原動力変異は DNA編集酵素APOBEC3Aによって引き起こされる 乗客である可能性があります DNA幹のループの外で再発する変異は 真の癌の誘発因子を特定するのに役立ちます
科学分野:
- ゲノミクス
- バイオ情報学
- 癌 生物学
背景:
- ガン誘発変異と 乗客変異の区別は 腫瘍発生を理解するために 極めて重要です
- 現在の方法はしばしばランダムな突然変異分布を想定し,再発性突然変異によってドライバーを特定します.
- APOBEC3A酵素は,がんゲノムに特定の変異シグネチャーを導入することが知られている.
研究 の 目的:
- 再発した癌変異の分類を再評価する.
- APOBEC3Aが再発性変異を生成する役割を調査する.
- 癌を誘発する真の変異を発見するための信頼できる方法を特定する.
主な方法:
- 癌ゲノム変異の状況のバイオ情報分析
- 酵素と基板の相互作用を研究する生化学的測定法
- 癌の統計モデル化にゲノム特性の統合
主要な成果:
- 以前に確認された多くの再発性がん変異は,おそらく寄生変異である.
- ホットスポット旅客変異は,APOBEC3AがDNA幹ループを好むことと頻繁に関連しています.
- 幹のループの外にあるAPOBECシグネチャーを持つ再発性変異は,既知のドライバ遺伝子で濃縮されています.
結論:
- APOBEC3A媒介によるDNA幹ループの変異は,偽陽性ドライバー信号を生成する可能性があります.
- DNA幹ループのようなゲノム特性が コンピューターモデルに組み込まれていれば ドライバーを正確に識別できます
- 幹のループの外のAPOBECシグネチャー変異は,新しい癌の誘発因子を予測するのに有望である.
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