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Related Concept Videos

Polarity of the Cytoskeleton01:18

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The intrinsic polarity of cells can be primarily attributed to two factors- i) the asymmetric accumulation of mobile components such are regulatory molecules and subcellular components across the cell and ii) the orientation of polar cytoskeletal filaments that make up the cytoskeletal networks, specifically microfilaments, and microtubules arranged along the axis of polarity. Interactions between the cytoskeletal filaments are crucial for the establishment and maintenance of the polar nature...
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Overview of the Cytoskeleton
The cytoskeleton is a network of protein filaments present within the cell, having three distinct filaments ̶   microfilaments, microtubules, and intermediate filaments. Each has characteristic features that distinguish them, including the dynamics of their assembly and disassembly, mechanical properties, polarity, and the type of molecular motors associated with them. Earlier, they were thought to be present only in eukaryotic cells; however, their...
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The cytoskeletal architecture can be studied using different microscopic and biochemical techniques. Electron microscopy was instrumental in discovering the cytoskeletal architecture around the 1960s, which allowed obtaining structural information at a high-resolution level. However, the sample preparation procedure often limits this ability in biological samples. Several protocols have been developed over the years to optimize sample preparation. In one of the protocols known as rotary...
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Axons are long, cytoplasmic processes of nerve cells capable of propagating electrical impulses known as action potentials. The cytoplasm or axoplasm of an axon contains neurofibrils, neurotubules, small vesicles, lysosomes, mitochondria, and various enzymes, all encased within the axolemma, the plasma membrane of the axon.
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A reversible chemical reaction represents a chemical process that proceeds in both forward (left to right) and reverse (right to left) directions. When the rates of the forward and reverse reactions are equal, the concentrations of the reactant and product species remain constant over time and the system is at equilibrium. A special double arrow is used to emphasize the reversible nature of the reaction. The relative concentrations of reactants and products in equilibrium systems vary greatly;...
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Regeneration is the process of restoring injured or lost tissues, organs, or body parts. While simpler organisms generally show greater ability to regenerate their whole body, few complex animals show similarly exceptional regeneration. For example, planarian flatworms have a unique regenerative potential making them a popular study organism among biologists to understand the mechanisms of whole body regeneration. Other organisms, such as hydra, also show extreme regeneration potential;...
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Updated: Feb 13, 2026

Quantifying Cytoskeleton Dynamics Using Differential Dynamic Microscopy
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Cytoskeleton dynamics in axon regeneration.

Oriane Blanquie1, Frank Bradke1

  • 1Laboratory for Axon Growth and Regeneration, German Center for Neurodegenerative Diseases (DZNE), Sigmund-Freud-Strasse 27, 53127 Bonn, Germany.

Current Opinion in Neurobiology
|March 16, 2018
PubMed
Summary
This summary is machine-generated.

Modulating cytoskeleton dynamics in injured neurons can convert growth-blocking structures into growth cones, promoting axon regeneration. This approach also impacts scar tissue, offering a promising therapeutic strategy for spinal cord injury.

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Area of Science:

  • Neuroscience
  • Cell Biology
  • Regenerative Medicine

Background:

  • Cytoskeleton dynamics, particularly involving microtubules and actin, are crucial for neuronal structure and growth.
  • Following injury, adult central axons form a growth-inhibiting retraction bulb due to abnormal cytoskeleton dynamics.
  • This retraction bulb prevents effective axon regeneration after central nervous system injury.

Purpose of the Study:

  • To investigate the role of cytoskeleton dynamics in axon regeneration after injury.
  • To explore the potential of pharmacologically modulating cytoskeleton dynamics to overcome regeneration barriers.
  • To assess the impact of targeting cytoskeleton dynamics on the glial scar environment.

Main Methods:

  • Pharmacological modulation of cytoskeleton dynamics in injured axons.
  • Analysis of structural changes in neuronal growth cones and retraction bulbs.
  • Evaluation of the effects on scar-forming cell migration and composition.

Main Results:

  • Pharmacological intervention transformed growth-incompetent retraction bulbs into growth-competent structures.
  • Modulating cytoskeleton dynamics altered the inhibitory nature of the scar tissue, making it more permissive for axon growth.
  • Cytoskeleton dynamics were identified as a key factor influencing both intrinsic axonal growth and extrinsic inhibitory environment.

Conclusions:

  • Cytoskeleton dynamics are a critical target for promoting axon regeneration.
  • Pharmacological targeting of the cytoskeleton offers a potential therapeutic avenue for spinal cord injury.
  • Existing cytoskeleton-targeting drugs may be repurposed for regenerative therapies post-spinal cord injury.