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Chromatin Immunoprecipitation from Human Embryonic Stem Cells
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幹細胞の分化過程におけるクロマチン構造の再編成
Jesse R Dixon1, Inkyung Jung2, Siddarth Selvaraj3
11] Ludwig Institute for Cancer Research, 9500 Gilman Drive, La Jolla, California 92093-0653, USA [2] Medical Scientist Training Program, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, USA.
Nature
|February 20, 2015
まとめ
クロマチンの再編成は,ヒト細胞発達の過程で遺伝子発現を大幅に変化させます. この研究では,全ゲノムにわたるクロマチンの相互作用をマッピングし,異なる細胞系における遺伝子調節を制御するダイナミックな変化を明らかにしました.
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:
- 高級クロマチンの構造は,遺伝子発現の重要な調節因子である.
- 哺乳類の発達と系統の仕様におけるクロマチンの動態は完全に理解されていません.
研究 の 目的:
- ヒト胚性幹細胞およびその由来系における全ゲノムクロマチンの相互作用をマッピングする.
- 系統特異の過程におけるクロマチンの再編成とその遺伝子発現への影響を調査する.
主な方法:
- 全ゲノムクロマチンの相互作用マッピング (Hi-C).
- クロマチンの相互作用マップとハプロタイプ解析のエピジェノームとトランスクリプトームデータを統合.
- 人間の胚性幹細胞が4つの異なる系統に微分する過程におけるクロマチンのダイナミクスの分析.
主要な成果:
- ヒトの細胞系統の仕様で広範囲にわたるクロマチンの再編成が起こります.
- 自己結合クロマチンのドメインは安定しているものの,ドメイン内およびドメイン間の相互作用は大きく変化する.
- これらの変化は,全ゲノムにわたる36%の活性および非活性染色体コンパートメントに影響します.
- 遺伝子発現における広範なアレルバイアスは,結合された調節要素のアレルバイアスのクロマチンの状態と相関しています.
結論:
- クロマチンダイナミクスは,哺乳類の発達中の遺伝子発現を調節する上で重要な役割を果たします.
- この研究は,ヒトの細胞系における長距離遺伝子制御を理解するための包括的なリソースを提供します.
- この発見は,細胞運命を決定するクロマチンの構造のダイナミックな性質を強調しています.
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