Isolation of synaptic vesicles from genetically engineered cultured neurons

Area of Science:

• Neuroscience
• Cell Biology
• Biochemistry

Background:

• Synaptic vesicles (SVs) are crucial for neurotransmission, but isolating them from genetically modified neurons is challenging.
• Current methods often rely on transgenic animals, facing technical and biological limitations.

Purpose of the Study:

• To establish an efficient ex vivo method for isolating functional SVs from genetically engineered cultured neurons.
• To assess the feasibility of using cultured neurons as a source for SV isolation and modification.

Main Methods:

• Utilized lentiviral transduction to genetically engineer cultured rat cortical neurons.
• Developed an ex vivo procedure for isolating SVs from these engineered neurons.
• Employed total internal reflection fluorescence (TIRF) microscopy for visualization and analysis.

Main Results:

• Isolated sufficient quantities of functional SVs from approximately 10^8 cultured cortical neurons for analysis.
• Demonstrated comparable neurotransmitter uptake in SVs from cultured neurons versus those from intact cortex.
• Confirmed high efficiency of SV modification using an exogenous SV-targeted marker.

Conclusions:

• Successfully modified and isolated functional SVs from cultured neurons via viral transduction.
• This method provides a more accessible way to obtain SVs from genetically engineered neurons.
• Facilitates the integration of in situ and in vitro studies across diverse genetic contexts.