カストレーションに抵抗する前立腺がんを誘発する構造的変異は,リンクドリードゲノム配列解析によって明らかになった
Srinivas R Viswanathan1, Gavin Ha1, Andreas M Hoff2
1Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA; Cancer Program, Broad Institute of MIT and Harvard, Cambridge, MA, USA; Harvard Medical School, Boston, MA, USA.
Cell
|June 19, 2018
まとめ
転移性離抵抗性前立腺がん (mCRPC) は,主性前立腺がんとは異なり,AR増強剤のタンデム複製を含む,頻繁なAR局部の再編成を示しています. これらの発見は,複雑なmCRPCゲノムと潜在的な治療標的を明らかにしています.
科学分野:
- ゲノミクス
- 腫瘍学
- 前立腺がん 研究
背景:
- 転移性除抵抗性前立腺がん (mCRPC) は,前立腺がんによる死亡の主な原因である.
- mCRPCに関する全ゲノムシーケンシング (WGS) の研究は限られており,そのゲノム環境の理解を妨げています.
- mCRPCのゲノム変異を特定することは効果的な治療法の開発に不可欠です.
研究 の 目的:
- 全ゲノム配列解析を用いてmCRPCのゲノム構造を調査する.
- 特にmCRPCの進行に関連した非コード領域での再発性遺伝子変異を特定する.
- 新しいゲノム研究結果に基づいて,mCRPCの潜在的治療標的を発見する.
主な方法:
- 23個のmCRPCバイオプシーサンプルでリンクされた全ゲノム配列解析 (WGS) を実施した.
- 86人のmCRPC患者の細胞フリーDNA (cfDNA) 配列解析データを分析した.
- 複合的なゲノム再編成を特徴とし,ARロカスと強化領域に焦点を当てている.
主要な成果:
- 大半のmCRPC症例で,ARの頻繁で複雑な再配置が観察されました.
- mCRPC症例の70%~87%で,原発性前立腺がん (< 2%) よりも著しく高かった.
- CDK12不活性化によって誘発される全ゲノムタンドム複製体フェノタイプに関連したARまたはMYC増強体複製体のサブセットを特定した.
結論:
- この研究は,mCRPCの複雑で独特なゲノム構造を明らかにし,特にARの位置の再編成が含まれています.
- mCRPC治療の新たな治療目標となる可能性がある.
- 非コーディングmCRPCゲノムの更なる調査は,追加の再発性イベントと治療戦略を明らかにする可能性があります.
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