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Neurulation01:30

Neurulation

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Neurulation is the embryological process which forms the precursors of the central nervous system and occurs after gastrulation has established the three primary cell layers of the embryo: ectoderm, mesoderm, and endoderm. In humans, the majority of this system is formed via primary neurulation, in which the central portion of the ectoderm—originally appearing as a flat sheet of cells—folds upwards and inwards, sealing off to form a hollow neural tube. As development proceeds, the...
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Neurogenesis and Regeneration of Nervous Tissue01:15

Neurogenesis and Regeneration of Nervous Tissue

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In the CNS, neurogenesis, the birth of new neurons from stem cells, is limited to the hippocampus in adults. In other regions of the brain and spinal cord, neurogenesis is almost non-existent due to inhibitory influences from neuroglia, especially oligodendrocytes, and the absence of growth-stimulating cues. The myelin produced by oligodendrocytes in the CNS inhibits neuronal regeneration. Furthermore, astrocytes proliferate rapidly after neuronal damage, forming scar tissue that physically...
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Nucleoid01:24

Nucleoid

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The nucleoid represents a structurally and functionally distinct region within prokaryotic cells, where the cell's DNA and associated proteins are housed. Unlike eukaryotic cells, prokaryotes lack a membrane-bound nucleus, and the nucleoid facilitates the organization and accessibility of the genetic material within this constraint. The DNA in most bacteria and archaea exists as a single, circular, double-stranded molecule that is highly compacted through supercoiling and interactions with...
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Eukaryotic Compartmentalizations01:46

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One of the distinguishing features of eukaryotic cells is that they contain membrane-bound organelles, such as the nucleus and mitochondria, that carry out specialized functions. Since biological membranes are only selectively permeable to solutes, they help create a compartment with controlled conditions inside an organelle. These microenvironments are tailored to the organelle's specific functions and help isolate them from the surrounding cytosol.
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Eukaryotic Compartmentalization01:37

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One of the distinguishing features of eukaryotic cells is that they contain membrane-bound organelles, such as the nucleus and mitochondria, that carry out specialized functions. Since biological membranes are only selectively permeable to solutes, they help create a compartment with controlled conditions inside an organelle. These microenvironments are tailored to the organelle's specific functions and help isolate them from the surrounding cytosol.
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Clathrin-coated vesicles use endocytosis to transport receptors and lysosomal hydrolases from the Golgi to the lysosome in the late secretory pathway. Clathrin-mediated endocytosis was the first described endocytic process, and Clathrin-coated vesicles remain one of the most well-studied transport vesicles. The molecular machinery that generates clathrin-coated vesicles comprises over 50 proteins that precisely coordinate vesicle formation. Cell surface receptors concentrated in indented sites...
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Production of Nurr-1 Specific Polyclonal Antibodies Free of Cross-reactivity Against Its Close Homologs, Nor1 and Nur77
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Nurr1は前障の発生と機能を調整する

Kuo Yan1, Andrew G Newman1, Pauline Lange1

  • 1Institute of Cell Biology and Neurobiology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)
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まとめ
この要約は機械生成です。

Nurr1は、認知に関与する脳領域である前障の発生と機能に不可欠な主要な転写因子です。その不在は、マウスにおける構造異常と行動異常につながります。

キーワード:
Nurr1 (Nr4a2)前障依存性行動前障形態形成機能的接続性単一細胞トランスクリプトーム

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Utilizing In Vivo Postnatal Electroporation to Study Cerebellar Granule Neuron Morphology and Synapse Development
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関連する実験動画

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科学分野:

  • 神経科学
  • 発生生物学
  • 分子生物学

背景:

  • 前障は、広範に相互接続され、意識などの認知機能に不可欠な大脳前部の構造です。
  • 前障の発生と行動制御を制御する分子メカニズムは、依然として大部分不明です。

研究 の 目的:

  • 前障の発生と行動制御におけるその役割の根底にある分子メカニズムを解明すること。
  • 前障の形態形成と細胞運命決定に関与する主要な転写因子を特定すること。

主な方法:

  • Nurr1欠損のマウスモデルにおけるNurr1 (Nr4a2)の役割を調査しました。
  • 遺伝子発現変化を分析するために、単一細胞トランスクリプトミクスを利用しました。
  • 前障の構造的および機能的接続性を調べました。
  • Nurr1欠損マウスの行動表現型を評価しました。

主要な成果:

  • Nurr1は、形態形成、細胞運命、接続性を含む前障の発生における重要な転写因子として特定されています。
  • Nurr1欠損は、前障細胞の異常な移動を引き起こし、前障の構造を変化させ、異所性遺伝子プログラムを活性化させます。
  • Nurr1欠損マウスでは、前障の接続性の障害と行動の調節不全が観察されました。
  • Nurr1はGαs-PKAシグナル伝達を抑制し、ニューロンの位置決定と細胞運命を調節します。

結論:

  • Nurr1は、前障の発生と機能の調整において中心的な役割を果たします。
  • Nurr1機能の破壊は、構造的な脳の異常と行動異常につながります。
  • Gαs-PKAシグナル伝達のNurr1による調節は、前障ニューロンの発生を制御する重要なメカニズムです。