皮質阻害性インターニューロンの発達多様化
Christian Mayer1,2,3,4, Christoph Hafemeister2, Rachel C Bandler1
1NYU Neuroscience Institute, Langone Medical Center, New York, New York 10016, USA.
Nature
|March 8, 2018
まとめ
この研究は,皮質内ニューロンの多様性を調査し,原始細胞の成熟と分化方法を明らかにします. Mef2cのような重要な転写因子は特定のニューロンのサブタイプを開発するために不可欠であり,脳機能と障害の洞察を提供します.
科学分野:
- 神経科学
- 発達生物学
- 遺伝学
背景:
- 皮質内ニューロンは 高いレベルの脳機能に不可欠です
- 内ニューロン多様性の生成を理解することは 脳の発達と機能を理解する鍵です
- 内ニューロン発達の不調は神経精神疾患と神経発達の障害に 関わっている.
研究 の 目的:
- 発達中の皮質内ニューロンの多様性を駆動する分子メカニズムを調査する.
- インターニューロン前駆体特異化と分化に関与する重要な転写因子と遺伝子モジュールを特定する.
- 異なるインターニューロンサブタイプの 胚の起源を明らかにする
主な方法:
- 単細胞RNAシーケンシング (scRNA-seq) を用いて細胞トランスクリプトームをプロファイルした.
- ガングリオン突起から採取したマウスの細胞で発達の時間経過を分析した.
- 開発段階のscRNA-seqデータセットの統合は,保存されたおよび異なるトランスクリプトミックのサインを識別するために使用されました.
主要な成果:
- ミトスの祖先におけるトランスクリプトミックの異質性は,成熟経路と転写因子の発現によって形成される.
- ポストミトスの原始体は,インターニューロン前駆体を含む異なる状態に分離する.
- 転写因子Mef2cは,パルバルブミン発現ニューロンの初期の前駆者の発現に不可欠であると特定されました.
結論:
- 早期の抑制性前駆体多様化は,保存された成熟経路と特定の転写因子によって引き起こされる.
- Mef2cは,特定の内部ニューロンのサブタイプ,特にパルバルブミン発現ニューロンを定義し,開発する上で重要な役割を果たします.
- 特定された遺伝子モジュールは,ヒト内ニューロンのサブタイプと関連する疾患の潜在的な治療標的の仕様に関する洞察を提供します.
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