2千の乳がんのゲノムとトランスクリプトミックの構造は,新しいサブグループを明らかにしています
Christina Curtis1, Sohrab P Shah, Suet-Feung Chin
1Department of Oncology, University of Cambridge, Hills Road, Cambridge CB2 2XZ, UK.
Nature
|April 24, 2012
まとめ
この研究は,約2,000の乳がんのゲノムとトランスクリプトームデータを統合して,新しい分子サブグループを特定しています. ソマティックコピーナンバーの異常は遺伝子発現に著しく影響し,新しい癌の誘発因子と患者との異なるアウトカムを明らかにします.
科学分野:
- 腫瘍学 腫瘍学
- ゲノミクスゲノミクスとは
- トランスクリプトミクス (Transcriptomics) とは
背景:
- 乳がんの異質性を理解することは,標的型療法にとって極めて重要です.
- 統合されたゲノムとトランスクリプトミックの分析は,がんの生物学に対するより深い洞察を提供します.
研究 の 目的:
- 統合されたDNAとRNAプロファイリングを使用して,新しい乳がんサブグループと分子ドライバーを特定する.
- 複製数の偏差を遺伝子発現と臨床結果と関連付けること.
主な方法:
- 1,992件の原発性乳がん (発見および検証セット) のコピー数および遺伝子発現データの統合分析.
- シスおよびトランス作用の複製数変異 (CNA) の特定と遺伝子発現への影響.
- 新しいサブグループを明らかにするために,ペア化されたDNARNAプロフィールの無監督分析.
主要な成果:
- ソマティックCNAは約40%の遺伝子の遺伝子発現に影響を及ぼし,シスおよびトランス作用CNAが優勢である.
- CNA駆動的な発現アウトライヤーを通して,新しいがん遺伝子 (例えば,PPP2R2A,MTAP,MAP2K4) を特定した.
- 高リスクのエストロゲン受容体陽性サブグループと前見が良いCNA-devoidサブグループを含む,異なる臨床結果を持つ新しい乳がんサブグループが発見されました.
- 免疫応答やミトーシスネットワークなどのサブグループ固有のネットワークを調節する特異的なトランス作用の偏差ホットスポット.
結論:
- 統合されたゲノムとトランスクリプトミックの分析により,乳がんの新種の分子分層化が明らかになりました.
- ソマティックCNAは,遺伝子発現の異質性の主要な原動力であり,異なる臨床サブグループを定義します.
- このアプローチは,新しい治療標的を特定し,個別化された乳がん治療のための枠組みを提供します.
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