title: MeCP2-dependent repression of an imprinted miR-184 released by depolarization.
abstract: Both fragile X syndrome and Rett syndrome are commonly associated with autism spectrum disorders and involve defects in synaptic plasticity. MicroRNA is implicated in synaptic plasticity because fragile X mental retardation protein was recently linked to the microRNA pathway. DNA methylation is also involved in synaptic plasticity since methyl CpG-binding protein 2 (MeCP2) is mutated in patients with Rett syndrome. Here we report that expression of miR-184, a brain-specific microRNA repressed by the binding of MeCP2 to its promoter, is upregulated by the release of MeCP2 after depolarization. The restricted release of MeCP2 from the paternal allele results in paternal allele-specific expression of miR-184. Our finding provides a clue to the link between the microRNA and DNA methylation pathways.
authors.affiliation: Laboratory of Genome Science, Biosignal Genome Resource Center, Institute for Molecular and Cellular Regulation, Gunma University, 3-39-15 Showa-machi, Maebashi 371-8512, Japan
authors.forename: Tasuku
authors.initials: T
authors.lastname: Nomura
authors.forename: Mika
authors.initials: M
authors.lastname: Kimura
authors.forename: Takuro
authors.initials: T
authors.lastname: Horii
authors.forename: Sumiyo
authors.initials: S
authors.lastname: Morita
authors.forename: Hidenobu
authors.initials: H
authors.lastname: Soejima
authors.forename: Shinichi
authors.initials: S
authors.lastname: Kudo
authors.forename: Izuho
authors.initials: I
authors.lastname: Hatada
mesh_terms: D000818:Animals; D001921:Brain / Q000166:cytology / Q000378:metabolism*; D019175:DNA Methylation; D005600:Fragile X Syndrome / Q000235:genetics; D006801:Humans; D051783:Methyl-CpG-Binding Protein 2 / Q000378:metabolism*; D051379:Mice; D035683:MicroRNAs / Q000235:genetics*; D015518:Rett Syndrome / Q000235:genetics; D015854:Up-Regulation
chemical_list: D051783:Methyl-CpG-Binding Protein 2; D035683:MicroRNAs