title: Altering the expression balance of hnRNP C1 and C2 changes the expression of myelination-related genes.
abstract: The expression level of hnRNP C1/C2 protein has been reported to be significantly decreased in the post-mortem brain of schizophrenic patients. In this study, we investigated whether overexpression of the hnRNP C variants hnRNP C1 and C2 changed the expression of myelination-related genes in the human neuroblastoma cell line SK-N-SH. In both hnRNP C1- and C2-overexpressing cells, the expression of quaking (QKI)-6 and QKI-7 significantly increased or decreased compared to the control, respectively. Intriguingly, QKI-5 and myelin basic protein were markedly up- or down-regulated by overexpressing hnRNP C2, respectively. Our findings are the first to demonstrate distinct functions of hnRNP C1 and C2, and may be helpful in understanding the functions of these molecules. These findings indicate that altered expression levels of hnRNP C in the brain of patients with schizophrenia could be involved in the pathophysiology of this disease through alteration of the QKI isoform and myelin basic protein expression.
authors.affiliation: Research Center for Child Mental Development, Hamamatsu University School of Medicine, Hamamatsu, Japan. Iwata-k@hama-med.ac.jp
authors.forename: Keiko
authors.initials: K
authors.lastname: Iwata
authors.forename: Hideo
authors.initials: H
authors.lastname: Matsuzaki
authors.forename: Takayuki
authors.initials: T
authors.lastname: Manabe
authors.forename: Norio
authors.initials: N
authors.lastname: Mori
mesh_terms: D045744:Cell Line, Tumor; D015972:Gene Expression Regulation, Neoplastic / Q000502:physiology*; D034482:Heterogeneous-Nuclear Ribonucleoprotein Group C / Q000235:genetics / Q000378:metabolism*; D006801:Humans; D004676:Myelin Basic Protein / Q000235:genetics / Q000378:metabolism; D009447:Neuroblastoma / Q000473:pathology; D020033:Protein Isoforms / Q000378:metabolism; D016601:RNA-Binding Proteins / Q000235:genetics / Q000378:metabolism*
chemical_list: D034482:Heterogeneous-Nuclear Ribonucleoprotein Group C; D004676:Myelin Basic Protein; D020033:Protein Isoforms; D016601:RNA-Binding Proteins