title: Mood stabilizing drugs expand the neural stem cell pool in the adult brain through activation of notch signaling.
abstract: Neural stem cells (NSCs) have attracted considerable attention as a potential source of cells for therapeutic treatment of impaired areas of the central nervous system. However, efficient and clinically feasible strategies for expansion of the endogenous NSC pool are currently unavailable. In this study, we demonstrate that mood stabilizing drugs, which are used to treat patients with bipolar disorder, enhance the self-renewal capability of mouse NSCs in vitro and that this enhancement is achieved at therapeutically relevant concentrations in the cerebrospinal fluid. The pharmacological effects are mediated by the activation of Notch signaling in the NSC. Treatment with mood stabilizers increased an active form of Notch receptor and upregulated its target genes in neural stem/progenitor cells, whereas coculture with gamma-secretase inhibitor or the presence of mutation in the presenilin1 gene blocked the effects of mood stabilizers. In addition, chronic administration of mood stabilizers expanded the NSC pool in the adult brain, which subsequently increased the cell supply to the olfactory bulb. We suggest that treatment with mood stabilizing drugs could be used to facilitate regeneration following insult to the central nervous system.
authors.affiliation: Department of Physiological Sciences, School of Life Sciences, Graduate University for Advanced Studies, Kanagawa, Japan.
authors.forename: Mikito
authors.initials: M
authors.lastname: Higashi
authors.forename: Noriko
authors.initials: N
authors.lastname: Maruta
authors.forename: Alan
authors.initials: A
authors.lastname: Bernstein
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Ikenaka
authors.forename: Seiji
authors.initials: S
authors.lastname: Hitoshi
mesh_terms: D000339:Affect / Q000187:drug effects*; D000818:Animals; D018692:Antimanic Agents / Q000627:therapeutic use*; D001921:Brain / Q000187:drug effects* / Q000378:metabolism; D018929:Cell Culture Techniques / Q000379:methods; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D008813:Mice, Inbred ICR; D009474:Neurons / Q000378:metabolism*; D009830:Olfactory Bulb / Q000187:drug effects / Q000378:metabolism; D053764:Presenilin-1 / Q000096:biosynthesis / Q000235:genetics; D051880:Receptors, Notch / Q000378:metabolism*; D015398:Signal Transduction; D013234:Stem Cells / Q000378:metabolism*
chemical_list: D018692:Antimanic Agents; D053764:Presenilin-1; D051880:Receptors, Notch