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Related Experiment Video

Updated: May 21, 2026

Microfluidics-Assisted Selective Depolarization of Axonal Mitochondria
06:55

Microfluidics-Assisted Selective Depolarization of Axonal Mitochondria

Published on: August 4, 2022

A microdevice platform for visualizing mitochondrial transport in aligned dopaminergic axons.

Xi Lu1, Jeong S Kim-Han, Karen L O'Malley

  • 1Department of Biomedical Engineering, Washington University, St. Louis, MO 63130, USA.

Journal of Neuroscience Methods
|June 2, 2012
PubMed
Summary

Researchers developed a novel microfluidic device for studying mitochondrial transport in dopaminergic neurons, crucial for understanding neurodegenerative diseases like Parkinson's disease.

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Expanding the Toolkit for In Vivo Imaging of Axonal Transport
09:24

Expanding the Toolkit for In Vivo Imaging of Axonal Transport

Published on: December 23, 2021

Area of Science:

  • Neuroscience
  • Cell Biology
  • Biomedical Engineering

Background:

  • Mitochondrial transport defects are implicated in neurodegenerative diseases, including Parkinson's disease (PD).
  • Studying mitochondrial transport in single axons is challenging with traditional cell culture methods.
  • Existing microfluidic devices are unsuitable for fragile midbrain dopaminergic neurons.

Purpose of the Study:

  • To develop and validate a novel microfluidic device for studying mitochondrial transport along single dopaminergic axons.
  • To enable long-term culture and observation of dopaminergic neurons and their axonal mitochondria.

Main Methods:

  • Fabrication of a polydimethylsiloxane (PDMS) microfluidic device using soft lithography.
  • Culture of midbrain dopaminergic neurons within the device for up to 4 weeks.
  • Labeling of axonal mitochondria using lentiviral vectors or Mitotracker Deep Red dye.
  • Tracking of mitochondrial movement along axons using confocal microscopy.

Main Results:

  • The microfluidic device successfully cultured dopaminergic neurons, allowing axon extension across microchannels.
  • The device enabled fluidic separation of axons from the soma, facilitating study of axonal transport.
  • Mitochondrial transport within axons was successfully visualized and tracked.

Conclusions:

  • The developed microfluidic device provides a robust platform for investigating mitochondrial transport in dopaminergic axons.
  • This technology will advance research into the role of mitochondrial dysfunction in neurodegenerative diseases.
  • The device overcomes limitations of previous methods for studying axonal transport in vulnerable neuronal populations.