Abstract
Enhancement of neurogenesis could be a suitable treatment approach to up-regulate dopaminergic neurons in Parkinson's disease (PD). In the present study, we focused on the kinetics of the subventricular zone (SVZ) in a mouse model of PD induced by MPTP injection. We showed recently the proliferation potential of neuronal stem cells (NSCs) prepared from the olfactory bulb of an animal model of PD [Hayakawa, H., Hayashita-Kinoh, H., Nihira, T., Seki, T., Mizuno, Y., Mochizuki, H., 2007. The isolation of neural stem cells from the OB of Parkinson's disease model. Neurosci. Res.]. In this study, we examined the relationship between proliferation and differentiation of NSCs in SVZ of both acute and chronic PD models. Only acute MPTP treatment significantly increased the areas of glial fibrillary acidic protein (GFAP)-expressing cells and decreased the areas of polysialylated neural cell adhesion molecule (PSA-NCAM)-expressing cells in the SVZ. In the case of caspase-11 knockout mice, MPTP did not induce alteration in the areas of GFAP-expressing cells and PSA-NCAM-expressing cells. Our results suggest that neuroinflammation related to the caspase-11 cascade in the striatum regulates differentiation of neural stem cells in the SVZ of our mouse model of PD.
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