title: Uncoupling protein 2 negatively regulates neurite extensions in PC12h cells.
abstract: Uncoupling protein 2 (UCP2) distributes in many organs including the brain. Though recent reports suggest that UCP2 is involved in the neuroprotection and the regulation of neurosecretion, the roles of UCP2 in the central nervous systems remain largely unclear. In order to clarify the significance of UCP2 in the brain especially at developmental stage, subcellular localizations of rat UCP2 (rUCP2) in the developing cerebellar Purkinje cells were immunochemically examined. The rUCP2-like immunoreactivities observed axon or its terminal during axonal maturation. This result implies that rUCP2 contributes to the neurite development. In the PC12h cells overexpressing rUCP2 or active mutant of rUCP2, the neurite outgrowth was significantly inhibited along with a reduction of cellular ATP level. These findings suggest a possibility that UCP2 is involved in negative regulation of neurite extensions through repression of the energy supply.
authors.affiliation: Division of Protein Metabolism, Institute for Protein Research, Osaka University, Osaka, Japan.
authors.forename: Shigeru
authors.initials: S
authors.lastname: Yamada
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Isojima
authors.forename: Shiro
authors.initials: S
authors.lastname: Kanamori
authors.forename: Satoshi
authors.initials: S
authors.lastname: Waguri
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Uchiyama
authors.forename: Katsuya
authors.initials: K
authors.lastname: Nagai
mesh_terms: D000818:Animals; D001921:Brain / Q000276:immunology / Q000648:ultrastructure; D064026:Calbindins; D002478:Cells, Cultured; D007150:Immunohistochemistry / Q000379:methods; D007473:Ion Channels / Q000378:metabolism*; D016253:Microscopy, Immunoelectron / Q000379:methods; D024101:Mitochondrial Proteins / Q000378:metabolism*; D016296:Mutagenesis; D016501:Neurites / Q000187:drug effects / Q000502:physiology*; D016716:PC12 Cells / Q000166:cytology*; D051381:Rats; D064030:S100 Calcium Binding Protein G / Q000378:metabolism; D000071246:Uncoupling Protein 2
chemical_list: D064026:Calbindins; D007473:Ion Channels; D024101:Mitochondrial Proteins; D064030:S100 Calcium Binding Protein G; C000604391:Ucp2 protein, rat; D000071246:Uncoupling Protein 2