Electrical stimulation induced structural 3D human engineered neural tissue with well-developed neuronal network and...

Area of Science:

• Neuroscience
• Biotechnology
• Tissue Engineering

Background:

• Three-dimensional (3D) neural tissue engineering offers promise for neural disease modeling and central nervous system (CNS) injury repair.
• Previous work established an electrical stimulation (ES) system for mouse engineered neural tissue (mENT) in vitro.
• The structural and functional characteristics of ES-induced human engineered neural tissue (hENT) remained unexplored.

Purpose of the Study:

• To investigate the application of ES in regulating human neural stem cells within a 3D Matrigel environment.
• To explore the structural components and functional properties of ES-induced hENT.
• To assess the potential of hENT for neural disease modeling and CNS injury treatment.

Main Methods:

• Immunofluorescence staining and electron microscopy were used to evaluate neuronal differentiation, neurite outgrowth, synapse formation, and myelin sheath development in hENT.
• Calcium imaging was employed to detect neuronal activity and electrical excitability within the hENT.
• Ex vivo fusion of mouse and human tissues was performed to investigate synaptic connections.

Main Results:

• ES effectively induced neuronal differentiation, organized neurite growth, and maturation of neuron subtypes in hENT.
• A well-developed neuronal network with synapses and myelin sheaths was constructed.
• Increased extracellular K+ concentration led to enhanced neuronal excitability, confirming electrical activity in hENT.

Conclusions:

• Electrical stimulation is a viable method for generating organized 3D human engineered neural tissue (hENT).
• ES-induced hENT exhibits both structural and functional characteristics of neural tissue.
• These findings support the potential of hENT for developing advanced neural disease models and therapeutic strategies for CNS injuries.