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Updated: May 5, 2026
10:31
Three-dimensional Imaging and Analysis of Mitochondria within Human Intraepidermal Nerve Fibers
Published on: September 29, 2017
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Mitochondrial mechanics nucleates axonal jamming and swelling.
Patrick S Noerr1, Ahmed A Abushawish2, Gulcin Pekkurnaz2
1Department of Pharmacology, School of Medicine, University of California San Diego.
Biorxiv : the Preprint Server for Biology
|May 4, 2026
Summary
Mitochondrial transport in neurons can cause traffic jams, especially with flexible mitochondria. This jamming can deform axons and lead to neurodegeneration, highlighting the importance of mitochondrial shape and dynamics for neuronal health.
Area of Science:
- Neuroscience
- Cell Biology
- Biophysics
Background:
- Neuronal function depends on mitochondria distribution.
- Mitochondrial transport in axons is crucial but poorly understood.
- Physical constraints on mitochondrial transport are not well defined.
Purpose of the Study:
- To model mitochondrial transport in axons.
- To investigate the physical constraints on mitochondrial movement.
- To understand the link between mitochondrial dynamics and axonal integrity.
Main Methods:
- Agent-based modeling.
- Coupling mitochondrial motility, morphology, and lifecycle dynamics.
- Simulating interactions with a deformable axonal boundary.
Main Results:
- Mitochondrial traffic jams emerge from a balance of propulsion and steric interactions.
- Organelle shape and mechanical properties govern jamming severity.
- Fission amplifies transport disruption; fusion restores it.
- Sustained jamming causes axonal membrane deformation and swelling.
Conclusions:
- Mitochondrial shape and dynamics influence axonal transport and integrity.
- Dysregulated mitochondrial fission-fusion balance can cause transport failure.
- A physical framework links mitochondrial dynamics to axonal pathology.
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