Actomyosin contractility scales with myoblast elongation and enhances differentiation through YAP nuclear export.

ABSTRACT: Skeletal muscle fibers are formed by the fusion of mononucleated myoblasts into long linear myotubes, which differentiate and reorganize into multinucleated myofibers that assemble in bundles to form skeletal muscles. This fundamental process requires the elongation of myoblasts into a bipolar shape, although a complete understanding of the mechanisms governing skeletal muscle fusion is lacking. To address this question, we consider cell aspect ratio, actomyosin contractility and the Hippo pathway member YAP as potential regulators of the fusion of myoblasts into myotubes. Using fibronectin micropatterns of different geometries and traction force microscopy, we investigated how myoblast elongation affects actomyosin contractility. Our findings indicate that cell elongation enhances actomyo

SUBMITTER: Bruyere C 

PROVIDER: S-EPMC6820726 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature