title: Stau1 regulates Dvl2 expression during myoblast differentiation.
abstract: Post-transcriptional regulation of gene expression by RNA-binding proteins has pivotal roles in many biological processes. We have shown that Stau1, a conserved RNA-binding protein, negatively regulates myogenesis in C2C12 myoblasts. However, its target mRNAs in regulation of myogenesis remain unknown. Here we describe that Stau1 positively regulates expression of Dvl2 gene encoding a central mediator of Wnt pathway in undifferentiated C2C12 myoblasts. Stau1 binds to 3' untranslated region (UTR) of Dvl2 mRNA and Stau1 knockdown shortened a half-life of the mRNA containing Dvl2 3' UTR. After induction of myogenic differentiation, association of Stau1 with 3' UTR of Dvl2 mRNA was decreased. Correlated with the decrease in the association, the Dvl2 mRNA level was reduced during myogenesis. A forced expression of Dvl2 markedly inhibited progression of myogenic differentiation. Our results suggest that Dvl2 has an inhibitory role in myogenesis and Stau1 coordinates myogenesis through the regulation of Dvl2 mRNA.
authors.affiliation: Department of Molecular Cell Biology, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Japan.
authors.forename: Yukio
authors.initials: Y
authors.lastname: Yamaguchi
authors.forename: Takahiro
authors.initials: T
authors.lastname: Naiki
authors.forename: Kenji
authors.initials: K
authors.lastname: Irie
mesh_terms: D020413:3' Untranslated Regions / Q000235:genetics; D048868:Adaptor Proteins, Signal Transducing / Q000235:genetics*; D000818:Animals; D002454:Cell Differentiation / Q000235:genetics*; D002460:Cell Line; D000072261:Dishevelled Proteins; D018507:Gene Expression Regulation, Developmental; D055785:Gene Knockdown Techniques; D051379:Mice; D024510:Muscle Development / Q000235:genetics*; D032446:Myoblasts / Q000166:cytology*; D010750:Phosphoproteins / Q000235:genetics*; D020871:RNA Stability; D012333:RNA, Messenger / Q000737:chemistry / Q000235:genetics; D016601:RNA-Binding Proteins / Q000235:genetics / Q000378:metabolism*
chemical_list: D020413:3' Untranslated Regions; D048868:Adaptor Proteins, Signal Transducing; C000606581:DVL2 protein, human; D000072261:Dishevelled Proteins; C000606582:Dvl2 protein, mouse; D010750:Phosphoproteins; D012333:RNA, Messenger; D016601:RNA-Binding Proteins; C492187:Stau1 protein, mouse