単細胞エピジェノミクスは,人間の皮質発達のメカニズムを明らかにする
Ryan S Ziffra1,2,3,4,5, Chang N Kim1,2,3, Jayden M Ross1,2,3
1Department of Anatomy, University of California, San Francisco, San Francisco, CA, USA.
Nature
|October 7, 2021
まとめ
この研究では,単細胞ATAC-seq (scATAC-seq) を使用して,発達中のヒトの脳におけるクロマチンのアクセシビリティをマッピングしています. 細胞タイプ特有の規制要素を明らかにし,体内の発達と脳器官の違いを強調しています.
科学分野:
- 神経科学
- ゲノミクス
- 発達生物学
背景:
- 染色体の状態の変化は 細胞の分化と 発達中の遺伝子調節に不可欠です
- 発達中の脳の細胞の運命と トポグラフィック・アイデンティティは 細胞のアイデンティティと 神経発達障害の脆弱性の鍵です
研究 の 目的:
- 発達中の人間の脳における 細胞タイプ特有のクロマチンのアクセシビリティパターンを特定する.
- ニューロゲネシスと細胞運命を規定する 規制要素を理解する
- 脳の器官モデルと人間の脳の発達を in vivo で比較する.
主な方法:
- 人間の前頭脳の原始組織での配列解析 (scATAC-seq) によるトランポザースアクセシビリティの単細胞測定法.
- クロマチンのアクセシビリティの細胞型および脳領域特有の変化を特定するための偏見のない分析.
- 細胞型特異的な候補規制要素を予測するための統合的分析
主要な成果:
- ニューロゲネシス中の動的,細胞型特異の染色体アクセシビリティの変化を持つゲノムロキスを特定した.
- 脳のオルガノイドは,強化剤のアクセシビリティを大きく再現しますが,in vivoで開かれたクロマチンの領域を逃しています.
- 皮質神経原始細胞の多様性が発見され,前頭皮質の神経系統の特異性においてレチノ酸のシグナル伝達が関与した.
結論:
- クロマチンの状態は,発達中の脳における細胞の種類多様性および細胞運命を決定するのに有意に寄与する.
- 皮質の発達モデルとしての脳器官の精度を評価するための枠組みを提供します.
- 脳の発達と障害を理解するために,生体内クロマチンのダイナミクスを研究することの重要性を強調しています.
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