Related Experiment Video
Updated: Jun 13, 2026
09:48
An Approach to Enhance Alignment and Myelination of Dorsal Root Ganglion Neurons
Published on: August 24, 2016
Dendritic alterations after dynamic axonal stretch injury in vitro
Hubert Monnerie1, Min D Tang-Schomer, Akira Iwata
1Department of Neurosurgery, University of Pennsylvania, Philadelphia, PA 19107, USA.
Experimental Neurology
|May 19, 2010
Summary
Traumatic axonal injury (TAI) directly impacts dendrite structure, causing beading via sodium channels and glutamate receptors. This bystander effect highlights TAI
Area of Science:
- Neuroscience
- Cell Biology
- Traumatic Brain Injury Research
Background:
- Traumatic axonal injury (TAI) is a primary pathology in traumatic brain injury (TBI).
- The indirect effects of TAI on dendrites remain largely unexplored.
- Dendrite morphology is critical for neuronal function and brain recovery.
Purpose of the Study:
- To investigate TAI-induced changes in dendrite morphology using an in vitro model.
- To elucidate the mechanisms underlying TAI's effects on dendrites.
Main Methods:
- Utilized an in vitro model of axonal stretch injury on rat cortical neurons.
- Observed dendritic morphology changes post-injury.
- Conducted pharmacological experiments involving sodium, extracellular calcium, and NMDA receptor antagonists (MK-801).
Main Results:
- TAI induced rapid dendritic beading, which subsided over time.
- Dendritic beading was sodium-dependent and exacerbated by calcium removal.
- Blocking NMDA receptors with MK-801 prevented dendritic beading.
Conclusions:
- Axon mechanical injury directly influences dendrite morphology, demonstrating a bystander effect.
- TAI-induced dendritic alterations suggest potential impacts on neuronal plasticity in vivo.
- Understanding TAI's effects on dendrites is crucial for brain injury recovery.
