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Updated: Aug 16, 2026
10:02
Mechanical Manipulation of Neurons to Control Axonal Development
Published on: April 10, 2011
Axonal growth in response to experimentally applied mechanical tension
Developmental Biology
|April 1, 1984
Summary
Mechanical tension can stimulate neurite outgrowth in neurons. A novel device, the Cell Puller, demonstrated that controlled microelectrode towing elongates neurites, suggesting a role for tension in neural development.
Area of Science:
- Neuroscience
- Cell Biology
- Biophysics
Background:
- Neurite outgrowth is crucial for neural development and network formation.
- The physical forces influencing neurite elongation are not fully understood.
Purpose of the Study:
- To investigate the role of mechanical tension in neurite elongation.
- To develop a method for controlled neurite growth using mechanical stimulation.
Main Methods:
- A custom-built device, the Cell Puller, was used to apply controlled mechanical tension to microelectrodes.
- Microelectrodes were attached to growth cones of cultured chick sensory ganglion neurons.
- Neurite elongation was measured under varying tension speeds and durations.
Main Results:
- Slow, steady towing (up to 100 microns/hr) by the microelectrode significantly elongated neurites up to 960 microns.
- Increased neurite volume was observed after towing.
- Towed neurites exhibited normal morphology, organelle transport, and continued growth.
- Electron microscopy confirmed typical neurite ultrastructure with aligned microtubules and neurofilaments.
Conclusions:
- Mechanical tension is a significant factor promoting neurite elongation under tissue culture conditions.
- The findings suggest that mechanical tension, generated by growth cone activity and tissue movement, may drive neurite extension during normal development.
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