title: Adult Neural Stem Cells from the Subventricular Zone Give Rise to Reactive Astrocytes in the Cortex after Stroke.
abstract: Reactive astrocytes (RAs) have been reported to convert to multipotent neural stem cells (NSCs) capable of neurosphere (NS) formation and multilineage differentiation in vitro. Using genetic tagging, we determined that subventricular zone (SVZ) NSCs give rise to NSs derived from the stroke-injured cortex. We demonstrate that these cells can be isolated from the cortex in two different models of stroke and from different stroke-lesioned cortical regions. Interestingly, SVZ NSCs give rise to a subpopulation of RAs in the cortex that contribute to astrogliosis and scar formation. Last, we show that these SVZ derived RAs can be converted to neurons in vivo by forced expression of Ascl1. Identifying the contribution of cells originating from the SVZ to injury repair has implications for neural regeneration strategies.
authors.affiliation: Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, ON M5T 3H7, Canada.
authors.forename: Maryam
authors.initials: M
authors.lastname: Faiz
authors.affiliation: Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, ON M5S 3E1, Canada; Department of Surgery, University of Toronto, Toronto, ON M5T 1P5, Canada.
authors.forename: Nadia
authors.initials: N
authors.lastname: Sachewsky
authors.affiliation: Department of Physiological Genomics, Institute of Physiology, Ludwig-Maximilians University Munich, Pettenkoferstrasse 12, Munich D-80336, Germany; Institute for Stem Cell Research, Helmholtz Center Munich, Ingolstädter Landstrasse 1, Neuherberg/Munich D-85764, Germany.
authors.forename: Sergio
authors.initials: S
authors.lastname: Gascón
authors.affiliation: Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, ON M5T 3H7, Canada.
authors.forename: K W Annie
authors.initials: KW
authors.lastname: Bang
authors.affiliation: Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, ON M5S 3E1, Canada; Department of Surgery, University of Toronto, Toronto, ON M5T 1P5, Canada. Electronic address: cindi.morshead@utoronto.ca.
authors.forename: Cindi M
authors.initials: CM
authors.lastname: Morshead
authors.affiliation: Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, ON M5T 3H7, Canada; Department of Obstetrics and Gynecology, University of Toronto, Toronto, ON M5G 1E2, Canada. Electronic address: nagy@lunenfeld.ca.
authors.forename: Andras
authors.initials: A
authors.lastname: Nagy
mesh_terms: D000818:Animals; D001253:Astrocytes / Q000166:cytology* / Q000378:metabolism; D051792:Basic Helix-Loop-Helix Proteins / Q000096:biosynthesis; D002540:Cerebral Cortex / Q000166:cytology* / Q000378:metabolism / Q000473:pathology; D020547:Lateral Ventricles / Q000166:cytology*; D051379:Mice; D008810:Mice, Inbred C57BL; D008822:Mice, Transgenic; D058953:Neural Stem Cells / Q000166:cytology* / Q000378:metabolism; D009474:Neurons / Q000378:metabolism / Q000473:pathology; D020521:Stroke / Q000378:metabolism / Q000473:pathology*
chemical_list: D051792:Basic Helix-Loop-Helix Proteins; C499317:Ascl1 protein, mouse