哺乳類の発達過程で全ゲノムにわたる強化剤の使用における迅速かつ広範囲にわたる変化
Alex S Nord1, Matthew J Blow2, Catia Attanasio1
1Genomics Division, MS 84-171, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
Cell
|December 24, 2013
まとめ
この研究は,マウスの発達中のダイナミックな強化剤の活性性を明らかにしています. 特定された増強剤のほとんどは一時的に制限された活性を示し,段階特有の遺伝子調節と発達の決定的な役割を果たしました.
科学分野:
- ゲノミクスゲノミクスとは
- 発達生物学 発達生物学について
- エピジェネティクス エピジェネティクス
背景:
- 増強剤は組織特異的な遺伝子発現に不可欠ですが,発達中のその動的活動は十分に理解されていません.
- ゲノム全体のエンハンスターアノテーションは進んでいますが,時間的なパターンとインビボの役割はほとんど未知のままです.
研究 の 目的:
- 哺乳類の発達中の増強剤の全ゲノム利用と時間的活動を調査する.
- 異なる組織と発達段階におけるダイナミックエンハンサーの使用の機能的役割を理解する.
主な方法:
- 活性増強剤を特定するために,エピジェノミックプロファイリング (H3K27ac) を利用しました.
- 3つの組織における7つの発達段階にわたる強化剤の活性を調べるために,トランスジェニックマウスアッセイを採用した.
- 進化の保存を評価するために比較ゲノム分析を行った.
主要な成果:
- 厳格に一時的に制限されたアクティビティウィンドウを持つ約90,000の強化剤を特定しました.
- 強化剤は,段階特有の生物学的機能と調節経路と関連していることが判明した.
- 妊娠中期後の増強剤の進化的保存の減少が観察されました.
結論:
- 強化剤の使用は高度にダイナミックで,哺乳類の発達中に一時的に調節されます.
- 増強剤の活動におけるこれらのダイナミックな変化は,発達過程と病気にとって根本的なものです.
- この研究は,in vivoにおけるタイムラーエンハンサーのダイナミクスに関する全ゲノム的な見解を提供します.
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