挿入と削除はヒトがんにおける系統決定遺伝子を標的とする
Marcin Imielinski1, Guangwu Guo2, Matthew Meyerson3
1Department of Pathology and Laboratory Medicine, Englander Institute for Precision Medicine, Institute for Computational Biomedicine, and Meyer Cancer Center, Weill Cornell Medicine, New York, NY 10065, USA; New York Genome Center, New York, NY 10013, USA.
Cell
|January 17, 2017
まとめ
癌細胞は 特定の機能に不可欠な遺伝子の 独特の変異パターンを表しています 研究者らは,様々ながんにおける分泌細胞系遺伝子の新しいインデルホットスポットを特定し,細胞タイプとがん発症の関連性を明らかにした.
科学分野:
- ゲノミクス
- 癌 生物学
- 分子腫瘍学
背景:
- 特定の細胞タイプは臓器機能に不可欠なタンパク質を分泌し,例えば肺の表面活性タンパク質,肝臓のアルブミン,胃のリパースなどです.
- 肺アデノカルシノーマに関する以前のゲノム研究では,表面活性タンパク質遺伝子の非コーディング体内変異ホットスポットとインデルホットスポットが特定されました.
研究 の 目的:
- 様々な固体がんにおける高発現遺伝子の非コーディング領域におけるインデールホットスポットの存在と特徴を調査する.
- 細胞系統と癌の発症を結びつける潜在的変異過程を特定する.
主な方法:
- 肺腺がんの全ゲノム配列解析
- 肝臓,胃,甲状腺がんを含む他の固体がんへの結果の抽出.
- インデルのホットスポットに関連した配列文脈とクロマチンの状態の分析.
主要な成果:
- 再発性,腫瘍型特異的なインデルホットスポットは,系統を定義する分泌遺伝子の非コーディング領域 (例えば,ALB,LIPF,TG) で発見されました.
- これらのインデルのホットスポットは,AATAATD DNAモチーフで有意に濃縮されました.
- H3K27acとH3K36me3を含む特定のクロマチンの文脈は,これらの変異ホットスポットと関連付けられました.
結論:
- 以前は認識されなかった変異過程が がんにおける高発現の系統決定遺伝子の非コーディング領域を標的としている.
- このプロセスは細胞の分泌系統と 特定の癌の変異パターンを結びつけます
- 発見は細胞のアイデンティティによって引き起こされる 癌の発達のメカニズムに洞察を与えます
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