In-vitro engineered human cerebral tissues mimic pathological circuit disturbances in 3D

Area of Science:

• Neuroscience
• Biotechnology
• Biomedical Engineering

Background:

• In-vitro modeling of complex brain network disorders, such as epilepsy, is challenging.
• Existing models often lack the three-dimensional (3D) functional complexity and local network modulation capabilities seen in vivo.
• Developing experimental approaches to recapitulate in vivo-like brain network characteristics is crucial for disease research.

Purpose of the Study:

• To engineer a novel in-vitro model of brain networks with 3D complexity.
• To enable local modulation of neuronal networks within the engineered tissues.
• To demonstrate the model's ability to mimic neuropathological signatures of brain disorders.

Main Methods:

• Utilized matrix-supported active cell reaggregation to engineer multiregional cerebral tissues.
• Developed a multi-chambered tissue-culture chip to house separated but interconnected cerebral tissues.
• Assessed the functional interconnectivity and neuropathological signatures of the engineered tissues.

Main Results:

• Successfully engineered 3D cerebral tissues with intact neuronal networks and functional interconnectivity.
• Demonstrated that the separated but interconnected tissues mimic key characteristics of brain networks.
• Observed the propagation of epileptiform discharges in the engineered tissues, mimicking neuropathological signatures.

Conclusions:

• The engineered multiregional cerebral tissues provide a robust in-vitro model for studying brain network disorders.
• This approach allows for the recapitulation of in vivo-like 3D functional complexity and local network modulation.
• The model successfully mimics neuropathological signatures, such as epileptiform discharge propagation, offering new avenues for epilepsy research.