Cell-Internal Nanomagnetic Forces Alter Cytoskeletal Protein Transport Dynamics in Developing Excitatory Axons.

Area of Science:

• Neuroscience
• Cell Biology
• Biophysics

Background:

• Cytoskeletal proteins like F-Actin and Microtubules are essential for neuronal growth, morphology, and axon maintenance.
• Previous studies used external magnetic forces to alter protein distribution and cell movement.
• The impact of internal forces on cytoskeletal protein transport dynamics in live axons remains largely unexplored.

Purpose of the Study:

• To investigate the effects of cell-internal nanomagnetic forces on the transport dynamics of human β-Actin and Tubulins within live axons.
• To build upon prior research involving magnetically actuated forces and neuronal engineering.

Main Methods:

• Utilized cell-internal nanomagnetic forces to apply mechanical stress to cytoskeletal proteins.
• Examined the transport dynamics of human β-Actin and Tubulins in cortical neurons.
• Investigated differential magnetic nanoparticle uptake at distinct developmental stages.

Main Results:

• Differential magnetic nanoparticle uptake was observed in cortical neurons at two developmental stages.
• Anterograde-aligned forces from nanoparticles biased the transport of α-Tubulin during an earlier developmental stage.
• Demonstrated the influence of internal magnetic forces on specific cytoskeletal protein transport.

Conclusions:

• Cell-internal nanomagnetic forces can modulate cytoskeletal protein transport in developing neurons.
• Targeted manipulation of axonal protein transport is a potential avenue for future neural engineering applications.