title: Purification of immature neuronal cells from neural stem cell progeny.
abstract: Large-scale proliferation and multi-lineage differentiation capabilities make neural stem cells (NSCs) a promising renewable source of cells for therapeutic applications. However, the practical application for neuronal cell replacement is limited by heterogeneity of NSC progeny, relatively low yield of neurons, predominance of astrocytes, poor survival of donor cells following transplantation and the potential for uncontrolled proliferation of precursor cells. To address these impediments, we have developed a method for the generation of highly enriched immature neurons from murine NSC progeny. Adaptation of the standard differentiation procedure in concert with flow cytometry selection, using scattered light and positive fluorescent light selection based on cell surface antibody binding, provided a near pure (97%) immature neuron population. Using the purified neurons, we screened a panel of growth factors and found that bone morphogenetic protein-4 (BMP-4) demonstrated a strong survival effect on the cells in vitro, and enhanced their functional maturity. This effect was maintained following transplantation into the adult mouse striatum where we observed a 2-fold increase in the survival of the implanted cells and a 3-fold increase in NeuN expression. Additionally, based on the neural-colony forming cell assay (N-CFCA), we noted a 64 fold reduction of the bona fide NSC frequency in neuronal cell population and that implanted donor cells showed no signs of excessive or uncontrolled proliferation. The ability to provide defined neural cell populations from renewable sources such as NSC may find application for cell replacement therapies in the central nervous system.
authors.affiliation: Queensland Brain Institute, The University of Queensland, Brisbane, Australia.
authors.forename: Hassan
authors.initials: H
authors.lastname: Azari
authors.forename: Geoffrey W
authors.initials: GW
authors.lastname: Osborne
authors.forename: Takahiro
authors.initials: T
authors.lastname: Yasuda
authors.forename: Mohammad G
authors.initials: MG
authors.lastname: Golmohammadi
authors.forename: Maryam
authors.initials: M
authors.lastname: Rahman
authors.forename: Loic P
authors.initials: LP
authors.lastname: Deleyrolle
authors.forename: Ebrahim
authors.initials: E
authors.lastname: Esfandiari
authors.forename: David J
authors.initials: DJ
authors.lastname: Adams
authors.forename: Bjorn
authors.initials: B
authors.lastname: Scheffler
authors.forename: Dennis A
authors.initials: DA
authors.lastname: Steindler
authors.forename: Brent A
authors.initials: BA
authors.lastname: Reynolds
mesh_terms: D000818:Animals; D002454:Cell Differentiation; D049109:Cell Proliferation; D002469:Cell Separation / Q000379:methods*; D002470:Cell Survival; D002478:Cells, Cultured; D055724:Electrophysiological Phenomena; D008297:Male; D051379:Mice; D039842:Neural Cell Adhesion Molecule L1 / Q000276:immunology; D058953:Neural Stem Cells / Q000166:cytology*; D009474:Neurons / Q000166:cytology* / Q000378:metabolism; D012794:Sialic Acids / Q000276:immunology
chemical_list: D039842:Neural Cell Adhesion Molecule L1; D012794:Sialic Acids; C103469:polysialyl neural cell adhesion molecule