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Related Concept Videos

Assembly of Complex Microtubule Structures01:32

Assembly of Complex Microtubule Structures

Complex microtubule structures are present in resting cells and in dividing cells. In resting cells, they are responsible for maintaining the cellular architecture, tracks for intracellular transport, positioning of organelles, assembly of cilia and flagella. They mediate the bipolar spindle assembly for chromosomal segregation and positioning of the cell division plate in dividing cells. The formation of microtubule complex structures depends on the cell type, cell stage, and cell function.
Spindle Assembly02:50

Spindle Assembly

Spindle assembly occurs through three, often coexisting, pathways – the centrosome-mediated pathway, the chromatin-mediated pathway, and the microtubule-mediated pathway – collectively contributing to form a robust spindle apparatus.
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Neurogenesis and Regeneration of Nervous Tissue

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...
Mechanism of Lamellipodia Formation01:31

Mechanism of Lamellipodia Formation

Cells migrating in response to external stimuli form lamellipodia, which are thin membrane protrusions supported by a mesh of linked, branched, or unbranched actin filaments. These actin filaments interact with myosin motor proteins, creating the dynamic actomyosin complex within the cytoskeleton. Contractility, or the ability to generate contractile stress, is inherent to the actomyosin complex. It helps cells detect the stiffness of the surrounding ECM and exert contractile force for...
The Spindle Assembly Checkpoint02:19

The Spindle Assembly Checkpoint

The spindle assembly checkpoint is a molecular surveillance mechanism ensuring the fidelity of chromosome segregation during anaphase. The checkpoint monitors the completion of all the prerequisite steps before chromosome segregation to determine whether the segregation process should proceed or be delayed.
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Mechanism of Filopodia Formation01:39

Mechanism of Filopodia Formation

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Related Experiment Video

Updated: Jun 22, 2026

Dendritic Spine Quantification Using an Automatic Three-Dimensional Neuron Reconstruction Software
07:45

Dendritic Spine Quantification Using an Automatic Three-Dimensional Neuron Reconstruction Software

Published on: September 27, 2024

Dendritic spine formation and stabilization.

Yoshihiro Yoshihara1, Mathias De Roo, Dominique Muller

  • 1Laboratory for Neurobiology of Synapse, RIKEN Brain Science Institute, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.

Current Opinion in Neurobiology
|June 16, 2009
PubMed
Summary
This summary is machine-generated.

New molecules like Ephrins and Telencephalin, along with trans-synaptic signaling, control the formation and stability of excitatory synapses on dendritic spines during neural development.

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Analysis of Dendritic Spine Morphology in Cultured CNS Neurons
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Analysis of Dendritic Spine Morphology in Cultured CNS Neurons

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3D Modeling of Dendritic Spines with Synaptic Plasticity
07:13

3D Modeling of Dendritic Spines with Synaptic Plasticity

Published on: May 18, 2020

Related Experiment Videos

Last Updated: Jun 22, 2026

Dendritic Spine Quantification Using an Automatic Three-Dimensional Neuron Reconstruction Software
07:45

Dendritic Spine Quantification Using an Automatic Three-Dimensional Neuron Reconstruction Software

Published on: September 27, 2024

Analysis of Dendritic Spine Morphology in Cultured CNS Neurons
11:48

Analysis of Dendritic Spine Morphology in Cultured CNS Neurons

Published on: July 13, 2011

3D Modeling of Dendritic Spines with Synaptic Plasticity
07:13

3D Modeling of Dendritic Spines with Synaptic Plasticity

Published on: May 18, 2020

Area of Science:

  • Neuroscience
  • Cell Biology
  • Developmental Biology

Background:

  • Synaptic plasticity and network formation are crucial for brain development.
  • Dendritic spine structure and stability are key to excitatory synapse function.

Purpose of the Study:

  • To elucidate the molecular mechanisms governing dendritic spine formation and stabilization.
  • To understand the role of novel molecules and signaling pathways in establishing stable excitatory synapses.

Main Methods:

  • Review of recent studies identifying key molecular players.
  • Analysis of trans-synaptic signaling pathways involved in synapse formation.
  • Investigation of activity-dependent mechanisms in spine selection.

Main Results:

  • Ephrins and Telencephalin regulate filopodia motility and spine transformation.
  • Trans-synaptic signaling (nitric oxide, proteases, adhesion molecules, Rho GTPases) modulates spine structure and stability.
  • Neural activity and plasticity contribute to the selection of persistent spines.

Conclusions:

  • Continuous remodeling of dendritic spines shapes synaptic networks.
  • A complex interplay of molecular signals and activity drives stable excitatory synapse establishment.
  • Understanding these processes is vital for comprehending neural development and function.