Development of 3D neuromuscular bioactuators

Area of Science:

• Biomedical Engineering
• Neuroscience
• Tissue Engineering

Background:

• Skeletal muscle bioactuators are key for biohybrid machines, requiring robust neural control.
• Animals use complex neural networks and neuromuscular units for coordinated muscle activity.

Purpose of the Study:

• To design and utilize a 3D neuron-muscle co-culture platform for studying neuromuscular bioactuators.
• To investigate synergistic interactions in the co-development of neural networks and muscle tissues.

Main Methods:

• Utilized a versatile 3D co-culture platform for neuron-muscle interactions.
• Employed microelectrode array electrophysiology to analyze neural activity.
• Quantified muscle contraction forces and sarcomere assembly.

Main Results:

• Demonstrated the formation of functional neuromuscular bioactuators using engineered muscle tissue.
• Observed preferential neuronal outgrowth towards muscles, suggesting chemotactic cues.
• Found enhanced muscle contractility and sarcomere assembly in co-cultured muscles.
• Noted increased neural firing rates and synchronous bursting in muscle-conditioned medium.

Conclusions:

• Neuron-muscle cross-talk is crucial for the in vitro development of neuromuscular bioactuators.
• The developed platform facilitates the study of biohybrid neuromuscular systems.
• Findings support the potential for advanced biohybrid machines with sophisticated motor control.