Compartmentalized microfluidic chambers enable long-term maintenance and communication between human pluripotent stem...

Area of Science:

• Neuroscience
• Bioengineering
• Stem Cell Biology

Background:

• Microfluidic devices offer promise for studying neurobiology, disease modeling, and drug discovery.
• Current models using rodent neurons lack human-specific receptors, while human stem cell-derived neurons mature slowly.
• Long-term culture of neurons presents challenges like overgrowth and cell death.

Purpose of the Study:

• To develop an improved microfluidic system for long-term culture of human neurons.
• To investigate neuron-to-neuron communication in a human cell model.
• To establish a platform for disease modeling and drug discovery using human neurons.

Main Methods:

• Integration of Matrigel as a 3D scaffold in an open chamber microfluidic system for high-density, long-term neuron culture.
• Utilizing Matrigel to control agonist diffusion between microfluidic chambers.
• Employing delayed neuron seeding and electrical stimulation/agonist addition to study directed neural communication.

Main Results:

• Successful five-month culture of neurons without growth inhibitors, overcoming slow maturation and overgrowth issues.
• Demonstration of functional neuron-to-neuron communication networks, evidenced by activation in adjacent chambers.
• Establishment of one-way communication between distinct human forebrain and midbrain dopaminergic neuron populations.

Conclusions:

• The Matrigel-enhanced microfluidic system provides a robust platform for long-term human neuron culture and functional studies.
• This system facilitates the investigation of neural communication relevant to human neurobiology and disease.
• The platform supports advanced applications in disease modeling and drug discovery using human stem cell-derived neurons.