人間の前頭脳の発達モデルにおけるクロマチンアクセシビリティのダイナミクス
Alexandro E Trevino1,2, Nasa Sinnott-Armstrong3, Jimena Andersen2,4
1Department of Bioengineering, Stanford University, Stanford, CA, USA.
まとめ
研究者は,発達中の遺伝子調節を理解するために,人間の前頭脳のオーガノイドにアクセス可能なクロマチンをマッピングしました. この研究は 皮質形成と神経精神疾患との 遺伝的関連に関する洞察を明らかにしています
科学分野:
- 神経科学
- 発達生物学
- ゲノミクス
背景:
- 前頭部の発達には 脳機能に不可欠な 複雑で同期した細胞プロセスが含まれます
- これらのプロセスの混乱は,様々な神経学的および精神疾患につながる可能性があります.
- 人間の前頭脳の発達を制御する 遺伝子規制メカニズムを理解することは 病気の研究に不可欠です
研究 の 目的:
- 人間の前頭脳の3次元オーガノイドに アクセス可能なクロマチンの包括的なマップを作成する.
- 長期間 (20ヶ月) の間,皮質形成中の遺伝子調節のダイナミックな変化を調査する.
- 人間の前頭脳の発達に関与する規制要素と転写因子を特定し,病気との関連を明らかにする.
主な方法:
- 人間の前頭脳の3次元オーガノイドの生成
- 脊椎と腹部前頭脳のオーガノイドから 脊髄と神経系を縦断的に採取する.
- クロマチンのアクセシビリティアッセイ (例えば,ATAC-seq) を開いたクロマチンの領域をマッピングする.
- クロマチンのアクセシビリティデータとトランスクリプトミクスの統合 (例えば,RNA-seq).
主要な成果:
- 人間の前頭脳オルガノイドのアクセス可能なクロマチン領域の詳細な地図が作成されました.
- 人間の脳組織で見つかった活性クロマチンの領域は,異なる発達段階のオーガノイドで特定されました.
- ヒトの皮質生成を調節する推定的な強化剤-遺伝子結合と重要な転写因子を特定した.
- この研究は,オルガノイドモデル内の神経精神疾患に関連するサインを特定した.
結論:
- 開発されたオルガノイド・プラットフォームは 人間の前頭脳の発達中の遺伝子調節ダイナミクスに関する前例のない洞察を提供します.
- このリソースは,病気の遺伝的リスクのマッピングと進化的保存の探索を容易にする.
- この発見は神経精神疾患と人間の脳の発達の 分子基盤の研究に 価値あるツールとなるでしょう
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