密集的に相互接続された転写回路は,ヒトの血液形成における細胞状態を制御する
Noa Novershtern1, Aravind Subramanian, Lee N Lawton
1Broad Institute, Cambridge, MA 02142, USA.
Cell
|January 19, 2011
まとめ
この研究は,ヒトの造血幹細胞の分化を管理する複雑な規制ネットワークを明らかにしています. 遺伝子発現プロファイリングは,相互に関連した遺伝子モジュールと転写因子を特定し,これまで理解していたよりも複雑なシステムを示唆しました.
科学分野:
- ヘマトポエーシスの研究
- 分子生物学は分子生物学である.
- システム生物学 システム生物学
背景:
- 血液形成の分化を調節する個々の転写因子は知られているが,血液形成の全体的な構造はほとんど特徴づけられていない.
- グローバルな規制回路を理解することは,発達過程と潜在的な治療目標の解読に不可欠です.
研究 の 目的:
- 人間の血液形成における規制回路のグローバルな組織を解明する.
- 血液形成状態を定義する遺伝子発現モジュールと転写因子ネットワークを特定する.
主な方法:
- 38の異なる浄化されたヒトの血液生成細胞集団の包括的な遺伝子発現プロファイリング.
- 確率モデルを遺伝子発現データに適用する.
- 遺伝子プロモーター内のシスエレメントの分析により,調節相互作用を推論する.
主要な成果:
- 高度に共発現する遺伝子モジュールを特定し,そのうちのいくつかは系統特異的であり,いくつかは複数の系統で広く発現する.
- 密度の高い相互接続のシス調節回路の発見.
- 多数の転写因子の観察,様々な血液形成状態で差異的に表現される.
結論:
- 血液形成は,これまで考えられていたより複雑なシステムによって調節され,複雑なシス調節回路が含まれています.
- この発見は,血液形成の規制ネットワークの基礎的な地図を提供し,さらなる調査のための道を開く.
- この研究は,複雑な生物学的プロセスを理解するためのシステムレベルのアプローチの力を強調しています.
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