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筋肉侵襲性膀がんの総合的な分子特性
A Gordon Robertson1, Jaegil Kim2, Hikmat Al-Ahmadie3
1Canada's Michael Smith Genome Sciences Center, BC Cancer Agency, Vancouver, BC V5Z 4S6, Canada.
Cell
|October 10, 2017
まとめ
この研究では 412の筋肉侵襲性膀がんを分析し 異なる分子サブタイプを明らかにしました これらのサブタイプを特定することで,標的型膀がん治療の患者様を 分類するのに役立ちます.
科学分野:
- 腫瘍学
- ゲノミクス
- 分子生物学
背景:
- 筋肉侵襲性膀がん (MIBC) は異質な疾患である.
- MIBCの分子サブタイプを理解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:
- マルチプラットフォームのデータを用いてMIBCを総合的に分析する.
- 生存率と治療反応と相関する分子サブタイプを特定する.
主な方法:
- 癌ゲノムアトラス (TCGA) のデータを用いた412の筋肉侵襲性膀がんの分析.
- 変異シグネチャー,mRNA,長い非コーディングRNA (lncRNA),およびmiRNA発現プロフィールを使用した.
- ゲノムとトランスクリプトミックのデータに基づいたクラスタリング分析を採用した.
主要な成果:
- 58の有意に変異した遺伝子を特定し,APOBEC変異に変異負荷を関連付けました.
- 5年生存率75%の 高い変異のサブセットを発見した
- ヒストロジーから独立して,mRNA発現に基づく,生存率の低い"ニューロン"サブタイプを定義した.
- 統合されたマルチオームデータにより,異なった表皮細胞-メゼンキーマ移行 (EMT) ステータス,CISスコア,および組織学的特徴を有するサブタイプが特定される.
結論:
- MIBCのマルチプラットフォーム分析は,有意な分子異質性を明らかにします.
- 5つの異なる発現サブタイプが特定され,異なる治療戦略のために患者の潜在的階層化が行われた.
- "ニューロン"サブタイプは,膀がんの新しい分子分類を表しています.
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