Viral Vector Reprogramming of Adult Resident Striatal Oligodendrocytes into Functional Neurons

Area of Science:

• Neuroscience
• Cell Biology
• Gene Therapy

Background:

• In vivo reprogramming of endogenous cells is a potential strategy for neuron replacement.
• Current methods often require transgenic approaches or viral gene delivery.

Purpose of the Study:

• To develop a novel adeno-associated virus vector for in vivo reprogramming of oligodendrocytes into neurons.
• To assess the efficiency and functionality of reprogrammed neurons in the rat striatum.

Main Methods:

• Development of a microRNA-GFP construct targeting polypyrimidine tract-binding protein.
• Packaging the construct into an adeno-associated virus vector for oligodendrocyte targeting.
• In vivo transduction of rat striatum and subsequent analysis of cell morphology, marker expression, and electrophysiology.

Main Results:

• Oligodendrocytes were successfully transduced and reprogrammed into cells with neuronal morphology and NeuN expression.
• Reprogrammed cells exhibited mature neuronal electrophysiological properties, including action potentials and synaptic currents.
• Functional presynaptic terminals were confirmed through retrograde tracing experiments.

Conclusions:

• This adeno-associated virus vector system effectively reprograms resident oligodendrocytes into functional neurons in vivo.
• This approach provides a viable method for harnessing endogenous cells for neural repair and regeneration.