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ゲノム損失によって明らかにされた癌の脆弱性
Deepak Nijhawan1, Travis I Zack, Yin Ren
1Departments of Cancer Biology and Medical Oncology, Dana Farber Cancer Institute, Boston, MA 02215, USA.
Cell
|August 21, 2012
まとめ
癌細胞はゲノムの不安定性を悪用し,遺伝子の複製番号の喪失につながります. 研究者らは,PSMC2のような,がん細胞の生存に不可欠な脆弱性を生み出す56のCYCLOPS (部分喪失によるがんの負債を生むコピー番号の変異) 遺伝子を特定しました.
科学分野:
- 癌生物学 癌生物学について
- ゲノミクスゲノミクスとは
- 分子腫瘍学 分子腫瘍学
背景:
- がん細胞は,ゲノムの不安定性により,しばしば遺伝子領域を失い,腫瘍抑制遺伝子などに影響を及ぼします.
- この損失は,がん細胞が悪用できるユニークな脆弱性を生み出す可能性があります.
研究 の 目的:
- 抑制された場合,部分的なコピー番号の損失で癌細胞の増殖を特に抑制する遺伝子を特定する.
- 特定されたこれらの遺伝子が,がんに特異的な負債に果たす役割を理解する.
主な方法:
- ゲノム全体の複製数とRNA干渉 (RNAi) プロフィールの統合分析.
- 抑制が選択的に細胞を害し,その遺伝子の部分的なコピー番号の損失を伴う遺伝子の識別.
主要な成果:
- 56のCYCLOPS (部分的な喪失による癌の負債を生むコピー番号の変更) 遺伝子を特定しました.
- これらの遺伝子は,スプライセソーム,プロテオソーム,リボソーム経路で濃縮されています.
- プロテアソームの構成要素であるPSMC2が強調された:正常な細胞には保護的なPSMC2複合体貯蔵庫があり,PSMC2複製喪失の細胞には存在しないため,PSMC2抑制に脆弱である.
結論:
- ゲノム不安定と部分的な遺伝子複製数喪失から生じる,がん特有の脆弱性の新種を発見した.
- CYCLOPS遺伝子組,特にPSMC2は,がん治療の潜在的な治療標的を代表しています.
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