Artificial Cells for Dissecting Exocytosis

Area of Science:

• Neuroscience
• Biophysics
• Synthetic Biology

Background:

• Neuronal communication relies on exocytosis, the release of neurotransmitters into the synaptic cleft.
• Understanding exocytosis regulation is crucial for brain function, cognition, learning, memory, and neurological disorders.
• Studying exocytosis in living cells presents significant challenges, necessitating simplified model systems.

Purpose of the Study:

• To develop and characterize functional artificial cells for studying exocytosis dynamics.
• To probe the biophysical aspects and molecular regulation of vesicle-mediated neurotransmission.
• To investigate the exocytosis fusion pore and its role in neurochemical release regulation.

Main Methods:

• Bottom-up synthetic methods using protein-free giant unilamellar vesicles (GUVs).
• Construction of artificial cells allowing tunable molecular complexity.
• Experimental setup involving microscopy, micromanipulation, microelectroinjection, and amperometry for chemical measurements.

Main Results:

• Successful design and fabrication of artificial cell models mimicking exocytosis.
• Implementation of chemical measurements to probe fusion pore dynamics.
• Demonstration of dissecting molecular component roles in exocytosis regulation.

Conclusions:

• Artificial cells offer a powerful platform for studying complex biological processes like exocytosis.
• These models enable detailed investigation of fusion pore dynamics and neurochemical release.
• This approach facilitates a deeper understanding of neuronal communication and associated malfunctions.