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ゲノムの特徴と転移性前立腺がんの構造的変化
David A Quigley1, Ha X Dang2, Shuang G Zhao3
1Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco (UCSF), San Francisco, CA, USA; Department of Epidemiology and Biostatistics, UCSF, San Francisco, CA, USA.
Cell
|July 24, 2018
まとめ
転移性前立腺がんの全ゲノム構造変異は 疾患の進行を促す新たな要因を明らかにしています これらの中には,アンドロゲン受容体 (AR) 近くの増強物質と,特定の変異体とDNA修復欠陥との間のリンクが含まれます.
科学分野:
- ゲノミクス
- 癌 生物学
- 分子腫瘍学
背景:
- タンパク質をコードする領域の変異は,がんにおいてよく研究されています.
- 転移性前立腺がんにおける全ゲノム構造変異 (SVs) は依然として定義が不十分である.
- エクソームシーケンシングは,非コーディングの規制要素に影響を与える SV を見逃している.
研究 の 目的:
- カストレーション抵抗性前立腺がん (CRPC) の転移における全ゲノム構造変異を特定し,特徴づけること.
- 主要ながん遺伝子と経路の調節におけるSVの役割を理解する.
- CRPCにおけるSVとDNA修復の欠陥のエチオロギー的な関連性を調べる.
主な方法:
- 101のCRPC転移の統合的深層全ゲノムおよび全トランスクリプトームシーケンシング
- 109X/38Xで腫瘍/正常な範囲の分析
- 増幅,タンドム複製,削除,再配置を含む様々なSVの識別と分類.
主要な成果:
- エクソーム配列決定で欠けた重要な腫瘍形成および進行レギュレータを変化させる特定されたSVs.
- 81% の患者でアンドロゲン受容体 (AR) の上流にあるインタージェニックエンハンサー領域の増幅が観察され,AR発現の増加と相関する.
- MYCの近くで,MYCの調節に関与する lncRNAで,タンドム複製ホットスポットが見つかりました.
- 異なるDNA修復欠陥に関連した特定のSVクラス:タンドム複製によるCDK12変異,再編成/染色体トリプシスによるTP53不活性化,および欠損によるBRCA2不活性化.
結論:
- SVは転移性前立腺がんにおける重要な遺伝子の調節に重要な役割を果たします.
- 増強剤の増幅と他のSVはARの異常と疾患の進行に寄与する.
- 特定のDNA修復経路の欠陥は,CRPCの異なるタイプの構造的ゲノム変異と関連しています.
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