Brain-on-a-Chip Device for Modeling Multiregional Networks.

Area of Science:

• Neuroscience
• Biotechnology
• Stem Cell Biology

Background:

• Animal models are standard for neurological drug discovery but have limitations due to genetic variations.
• Developing accurate human in vitro models of the brain for research remains a significant challenge.
• Existing methods struggle to replicate complex human neurotransmission circuits in vitro.

Purpose of the Study:

• To present a multicompartment microdevice for patterning neurospheres and directing neural stem cell differentiation.
• To create in vitro human neural networks with multiple neuronal phenotypes for disease modeling.
• To establish a more accurate and ethical platform for neurological drug discovery and screening.

Main Methods:

• Utilized a multicompartment microdevice to pattern human neural stem cells (hNSCs).
• Differentiated hNSCs into specific neuronal types (dopaminergic and GABAergic) within device compartments.
• Cultured neurospheres to form interconnected neuronal circuits across compartments.

Main Results:

• Successfully differentiated hNSCs into distinct neuronal phenotypes simultaneously within the microdevice.
• Demonstrated the formation of robust, unrestricted neuronal circuits between neurosphere arrays.
• Validated the device's capability to generate complex neural networks mimicking human brain connectivity.

Conclusions:

• The developed microdevice facilitates the in vitro construction of multineurotransmission circuits using human cells.
• This platform offers a promising approach for modeling neurological diseases and conducting drug screening.
• The technology may encourage a shift from animal-based models to human cell-based assays in drug discovery.