Engineering Cortical Networks: An Open Platform for Controlled Human Circuit Formation and Synaptic Analysis In Vitro

Area of Science:

• Neuroscience
• Bioengineering
• Stem Cell Biology

Background:

• Neuronal circuits are vital for brain function, and their dysfunction is implicated in neurological diseases.
• Human-induced pluripotent stem cell (iPSC) models offer insights but lack architectural precision.
• Microfluidic systems provide structural control but are limited by closed environments.

Purpose of the Study:

• To develop an advanced platform for studying neuronal circuit development and function.
• To overcome limitations of existing iPSC and microfluidic models for network analysis.
• To investigate molecular changes in neuronal connectivity associated with brain diseases.

Main Methods:

• Integration of iPSC-derived cortical neurons with bioengineering techniques.
• Utilized a polydimethylsiloxane-based microgroove topography and cell plating guide for "neuronal nodes".
• Implemented an open, large-scale platform enabling optogenetic control and network modification.

Main Results:

• Successfully created a flexible, open system for constructing defined neuronal circuits.
• Enabled precise control over neural activity, network composition, and synapse formation.
• Facilitated multi-level analyses, including proteomics, through neuronal material retrieval.

Conclusions:

• The developed open cortical network platform is a valuable tool for investigating neuronal development and function.
• This platform supports research into both normal brain states and pathological conditions like connectivity loss in brain diseases.
• Offers new avenues for understanding the molecular basis of neurological disorders.