title: Ectopic expression of α-synuclein affects the migration of neural stem cells in mouse subventricular zone.
abstract: α-Synuclein (α-syn) is a key protein in Parkinson's disease (PD), and its abnormal accumulation is implicated only not in the loss of dopaminergic neurons in the substantia nigra but also in impairment of olfactory bulb (OB) in PD. Olfactory dysfunction could arise from these OB changes as an early symptom in PD. We reported previously the impairment of neuronal stem cell (NSC) proliferation in the subventricular zone, which is upstream of OB in PD models. Reduction of NSC generation could potentially lead to olfactory dysfunction, which is commonly associated with and precedes the motor symptoms by several years in PD. Here, we investigated neurosphere formation in vitro and migration of NSCs in vivo after transduction of α-syn-encoding retroviral vector to characterize the function of α-syn in NSC. Over-expression of α-syn caused less effective formation of neurospheres and induced morphological changes. Fluorescence-activated cell sorting showed diminished NSC cell cycle progression induced by over-expression of α-syn. Intriguingly, suppression of NSC migration along the rostral migratory stream was observed when the α-syn-encoding vector was directly injected into the subventricular zone of mice in vivo. These results indicate that α-syn affects the generation of NSC and suggest that this protein could serve as a tool for the design of potentially useful therapy for PD patients.
authors.affiliation: Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan.
authors.forename: Momo
authors.initials: M
authors.lastname: Tani
authors.forename: Hideki
authors.initials: H
authors.lastname: Hayakawa
authors.forename: Toru
authors.initials: T
authors.lastname: Yasuda
authors.forename: Tomoko
authors.initials: T
authors.lastname: Nihira
authors.forename: Nobutaka
authors.initials: N
authors.lastname: Hattori
authors.forename: Yoshikuni
authors.initials: Y
authors.lastname: Mizuno
authors.forename: Hideki
authors.initials: H
authors.lastname: Mochizuki
mesh_terms: D000818:Animals; D002453:Cell Cycle / Q000235:genetics; D002454:Cell Differentiation / Q000235:genetics; D002465:Cell Movement / Q000235:genetics; D002478:Cells, Cultured; D002552:Cerebral Ventricles / Q000166:cytology / Q000378:metabolism*; D002828:Choristoma / Q000378:metabolism; D053686:Fetal Stem Cells / Q000166:cytology / Q000378:metabolism*; D018507:Gene Expression Regulation, Developmental / Q000235:genetics; D006801:Humans; D051379:Mice; D008810:Mice, Inbred C57BL; D009474:Neurons / Q000166:cytology / Q000378:metabolism*; D010641:Phenotype; D051844:alpha-Synuclein / Q000096:biosynthesis* / Q000235:genetics / Q000502:physiology
chemical_list: D051844:alpha-Synuclein