広範囲の異質性と空間的ゲノム組織における内在的多様性
Elizabeth H Finn1, Gianluca Pegoraro2, Hugo B Brandão3
1National Cancer Institute, NIH, Bethesda, MD 20892, USA.
Cell
|February 26, 2019
まとめ
細胞の3Dゲノム組織には大きな変化がある. 個々のアレルは独立して行動し,細胞集団内の幅広いゲノム構成を明らかにします.
科学分野:
- ゲノミクスと分子生物学
- 細胞生物学
- エピジェネティクス
背景:
- 3Dゲノム組織の確立された原則には,非ランダムな染色体位置付け,染色体区間,およびトポロジカルな関連ドメイン (TAD) が含まれる.
- しかし,ゲノム構造における細胞間および細胞内での変動性は,まだ十分に理解されていません.
研究 の 目的:
- 単細胞レベルで3Dゲノム組織における異質性を体系的に調査し特徴づけること.
- ヒトの線維細胞の集団内のゲノム構造の多様性の程度と性質を理解する.
主な方法:
- ヒトの個々の線維芽細胞の数百の染色体内相互作用を分析するために,高通量光学マッピングを使用した.
- 単細胞分析を用いて,単細胞内の個々のアレルの振る舞いを調べました.
主要な成果:
- ゲノム距離,上位階の染色体構造,染色体環境の影響を受けた低染色体内関連周波数を示した.
- 個々の細胞間のトポロジカル・アソシエイトドメイン (TADs) の構造の変異性を明らかにし,共通のTAD間の関連性を示した.
- 単一の核内の個々のアレルの独立した行動を示し,有意な異質性を強調した.
結論:
- この研究は,個々のアレルレベルで3Dゲノム組織における広範な多様性と異質性を明らかにしている.
- 細胞集団内で幅広いゲノム構成が共存し,静的なゲノム構造の概念に挑戦しています.
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