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XB-ART-54743
Dev Biol January 1, 2018; 438 (2): 94-110.

miR-206 is required for changes in cell adhesion that drive muscle cell morphogenesis in Xenopus laevis.

Vergara HM , Ramirez J , Rosing T , Nave C , Blandino R , Saw D , Saraf P , Piexoto G , Coombes C , Adams M , Domingo CR .


Abstract
MicroRNAs (miRNAs) are highly conserved small non-coding RNA molecules that post-transcriptionally regulate gene expression in multicellular organisms. Within the set of muscle-specific miRNAs, miR-206 expression is largely restricted to skeletal muscle and is found exclusively within the bony fish lineage. Although many studies have implicated miR-206 in muscle maintenance and disease, its role in skeletal muscle development remains largely unknown. Here, we examine the role of miR-206 during Xenopus laevis somitogenesis. In Xenopus laevis, miR-206 expression coincides with the onset of somitogenesis. We show that both knockdown and over-expression of miR-206 result in abnormal somite formation affecting muscle cell rotation, attachment, and elongation. In particular, our data suggests that miR-206 regulates changes in cell adhesion that affect the ability of newly formed somites to adhere to the notochord as well as to the intersomitic boundaries. Additionally, we show that β-dystroglycan and F-actin expression levels are significantly reduced, suggesting that knockdown of miR-206 levels affects cellular mechanics necessary for cell shape changes and attachments that are required for proper muscle formation.

PubMed ID: 29596841
Article link: Dev Biol
Grant support: [+]

Species referenced: Xenopus laevis
Genes referenced: dag1 fn1 gap43 mtor utrn


Article Images: [+] show captions