マウスとヒトは,インターニューロンの発達のための保存された転写プログラムを共有する
Yingchao Shi1, Mengdi Wang1,2, Da Mi3,4,5
1State Key Laboratory of Brain and Cognitive Science, CAS Center for Excellence in Brain Science and Intelligence Technology (Shanghai), Institute of Biophysics, Chinese Academy of Sciences (CAS), BNU IDG/McGovern Institute for Brain Research, Beijing 100101, China.
Science (New York, N.Y.)
|December 9, 2021
まとめ
遺伝的変異は特定の脳細胞を変えることで 神経発達障害に影響します この研究は 胎児の脳の発達における 重要な抑制性ニューロンの 生成に関する 保存されたメカニズムを明らかにしています 自閉症や統合失調症のような 疾患には極めて重要です
科学分野:
- 神経科学
- 発達生物学
- 遺伝学
背景:
- 自閉症や統合失調症を含む神経発達障害は,特定のニューロン集団の変異と関連しています.
- これらの状態には特に皮質および線状のガンマアミノバター酸を発現する (GABAergic) ニューロンが関与しています.
- これらの神経細胞の早期発達の理解は 病気のメカニズムを解読するのに 極めて重要です
研究 の 目的:
- 人間の胎児の脳におけるGABAergicニューロンの細胞多様性と発達軌道を特徴づける.
- これらのニューロンの特異化と微分化を制御する 転写プログラムの研究
- 人間のGABAergicニューロンの発達を,既知のネズミのモデルと比較する.
主な方法:
- 単細胞RNA配列解析 (scRNA-seq) を用いて,ヒトのギャングリオン突起の細胞群を分析した.
- スクRNA-seqデータは,前身細胞の地域的および時間的多様性を特定するために使用されました.
- 転写制御論理を推論するために計算分析が行われました.
主要な成果:
- ヒトのギャングリオン突起の原始細胞内で,重要な地域的および時間的多様性を特定した.
- 多様なプロジェクションニューロンと 内ニューロンの出現を特徴づけた.
- ヒトにおけるGABAergicニューロン特異化のための転写プログラムが,ネズミのそれと類似していることが判明した.
- ヒトのテレンセファロンにおけるGABAergicニューロンの発達を制御する保存された規制メカニズムが明らかにされました.
結論:
- 人間のギャングリオン突起は,様々なGABAergicニューロンタイプの生成に不可欠な複雑な原始細胞の多様性を表しています.
- 人間のGABAERGICニューロンの発達経路は,ネズミと保存された規制論理を共有しています.
- これらの発見は 人間の脳の発達と 神経発達障害の進化的基礎に 洞察を与えてくれます
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