構造的変異は,がんにおける文脈依存性腫瘍遺伝子の活性化を誘発する
Zhichao Xu1, Dong-Sung Lee2, Sahaana Chandran1
1Gene Expression Laboratory; Salk Institute for Biological Studies, La Jolla, CA, USA.
Nature
|December 8, 2022
まとめ
3Dゲノム組織を変化させる構造変異 (SV) は,がんにおいて一般的です. アクティビティ・バイ・コンタクト・モデルは,特定のSVによる腫瘍遺伝子の活性化を予測し,異なる遺伝子調節モードを明らかにします.
科学分野:
- ゲノミクス
- 癌 生物学
- エピジェネティクス
背景:
- 高次クロマチンの構造は,遠隔の要素を通して遺伝子発現を調節する.
- 3Dゲノム組織を変化させる構造変異 (SV) は,病気,特に癌を引き起こす可能性があります.
- いくつかのSVが遺伝子発現に影響する理由は不明である.
研究 の 目的:
- 癌の3Dゲノム構造の変化を特定する
- 特定のVSが腫瘍遺伝子の活性化に与える影響を決定する.
- 遺伝子発現に対するSVの影響を予測するモデルを開発する.
主な方法:
- 92の癌細胞系と患者のサンプルから得られたHi-Cデータ分析
- CRISPR-Cas9のゲノム工学により 新しいSVが作られます
- アクティビティ・バイ・コンタクト・モデルの適用
主要な成果:
- 腫瘍遺伝子の3D構造の変化 (MYC,TERT,CCND1) を確認した.
- 腫瘍遺伝子の活性が"接触による活性"モデルで予測できることを示した.
- これらのモデルは遺伝子のサブセットを予測するだけで 多様な規制メカニズムを示していることがわかりました
結論:
- 3Dゲノム組織に影響を及ぼすSVは,がんにおいて一般的です.
- 腫瘍遺伝子の活性化に SV の影響を予測する規則が生まれている.
- 異なる遺伝子クラスは,ディスタル要素を含む異なる調節モードを使用します.
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