Neural stem cells of the subventricular zone: A potential stem cell pool for brain repair in Parkinson's disease.

Parkinson's disease is a neurodegenerative disease caused by the degeneration of dopaminergic neurons in the substantia nigra. There are no curative treatments, and therefore, there is an urgent need for new approaches. One potential strategy being investigated is stem cell-based approaches to replace lost neurons, by, for example, harnessing endogenous neural stem cells (NSCs). These cells are found in the subventricular zone (SVZ) aligning the lateral ventricles and remain in a dormant state in the aged and diseased mammalian brain. However, with the appropriate stimuli, NSCs can shift into an activated state, proliferate, and differentiate. In this review, we discuss how PD pathology affects the behavior of NSCs and current pharmacological strategies to boost regeneration in PD. NSCs of the SVZ could be a stem cell source for brain repair, and future studies should shed light on whether these stem cells have the potential to produce functional neuronal cells.