Modular Platform for Rapidly Investigating Long-Distance Propagation of Human Neural Network Activity.

Area of Science:

• Neuroscience
• Stem Cell Biology
• Astrocyte Biology

Background:

• Biological neural networks display synchronized activity crucial for central nervous system function.
• Understanding network coordination is key to identifying therapeutic targets for neurodegeneration.
• Existing human cellular models for long-distance neural networks are limited.

Purpose of the Study:

• To investigate the role of astrocytes in synchronous network activity.
• To develop a human cellular model for studying long-distance neural communication.
• To explore astrocyte influence on neural organoids.

Main Methods:

• Utilized human pluripotent stem cell-derived bioengineered neural organoids.
• Assessed the impact of astrocytes on synchronous network activity within and across organoids.
• Introduced amyloid-beta oligomer protein to simulate a neurodegenerative environment.

Main Results:

• Astrocytes were found to significantly facilitate global activity within and across merged organoids.
• Amyloid-beta oligomer treatment inhibited synchronous activity initiation.
• Activity could be restored in diseased networks by propagation from neighboring healthy networks.

Conclusions:

• Human astrocytes play a critical role in establishing and maintaining biological neural networks.
• A novel, rapid model was developed for investigating long-range neural communication in health and disease.
• Neuromodulation strategies show potential for influencing distant diseased neural networks.