...Wei Zhang; Jiaojiao Yu; Guoquan Fu; Jianying Li; Huarong Huang; Jing Liu; Dongliang Yu; Mengsheng Qiu; Feixue Li ABSTRACT Migration of myoblasts derived from the occipital somites is essential for tongue morphogenesis. However, the molecular mechanisms of myoblast migration remain elusive...

... and palatoglossus muscles that are derived from the 4th pharyngeal arch (PA); however, the tensor veli palatini, derived from the 1st PA, is unaffected. Dlx5-positive cranial neural crest (CNC) cells are in direct contact with myoblasts derived from the pharyngeal mesoderm, and Dlx5 disruption leads to altered...

.... These studies showed that Slou regulates the activities of particular myoblast enhancers through Slou-preferred sequences, whereas swapping these sequences for sites that are capable of binding to multiple HD family members does not support the normal regulatory functions of Slou. Moreover, atypical Slou...

...Susan M. Abmayr; Grace K. Pavlath The fusion of myoblasts into multinucleate syncytia plays a fundamental role in muscle function, as it supports the formation of extended sarcomeric arrays, or myofibrils, within a large volume of cytoplasm. Principles learned from the study of myoblast fusion...

...Laurent Yvernogeau; Gwenola Auda-Boucher; Josiane Fontaine-Perus We have combined the use of mouse genetic strains and the mouse-into-chicken chimera system to determine precisely the sequence of forelimb colonization by presomitic mesoderm (PSM)-derived myoblasts and angioblasts, and the possible...

..., singly nucleated myoblasts fuse to each other to form myotubes. In muscle growth, singly nucleated myoblasts can also fuse to existing large,syncytial myofibers as a mechanism of increasing muscle mass without increasing myofiber number. Myoblast fusion requires the alignment and fusion of two apposed...

..., the effects of egl-15(neu * ) on sex muscle differentiation are an accurate reflection of a normal role of FGF signaling during vertebrate myogenesis. In cell culture, activation of the FGF receptor inhibits myoblast differentiation( Clegg et al., 1987 ; Spizz et al., 1986 ; Templeton and Hauschka, 1992...

... is expressed by fusion competent myoblasts and the epidermal muscle attachment site cells. Deletion analyses show that loss of hibris does not visibly affect embryonic CNS or somatic muscle development. However overexpressing hibris in the somatic mesoderm disrupts myoblast fusion. Furthermore, when...

... populations of cells: fusion-competent myoblasts and founder myoblasts specialised to seed the formation of particular muscles. Visceral muscle founders are of two classes: those that seed circular muscles and those that seed longitudinal muscles. These specialisations are revealed in mutant embryos where...

...Stefan Knirr; Natalia Azpiazu; Manfred Frasch In the Drosophila embryo, a distinct class of myoblasts, designated as muscle founders, prefigures the mature pattern of somatic body wall muscles. Each founder cell appears to be instrumental in generating a single larval muscle with a defined identity...

... muscle fibers reached a favourable developmental state. In reciprocal experiments we found that denervation caused a decrease in the myoblast pool. Furthermore, the formation of certain muscle fibers (dorsoventral muscles) was specifically blocked. Exceptions were the adult muscles that use larval muscle...

... in the premyoblasts in the limb bud, but not in the somitic cells or migrating premyogenic cells in the trunk at stage 18. By stage 24, HOXA-11 expression began to decrease from the posterior halves of the muscle masses. HOXA-13 was expressed strongly in the myoblasts of the posterior part in the dorsal/ventral...

... cell specific genes do not involve the upregulation of endogenous HES-1. In fact, exogenous expression of HES-1 in C2C12 myoblasts does not block myogenesis. Our data demonstrate the existence of a CBF1-independent pathway by which Notch inhibits differentiation. We therefore propose that Notch...

... and the dorsal vessel, develop fairly normally and defects are restricted to the body wall musculature. Myoblasts remain as single mononucleated cells, which express muscle myosin, showing that the developmental program of gene expression proceeds. These myoblasts occur at positions corresponding...

...Timothy J. Hinterberger; Kate F. Barald ABSTRACT Muscle satellite cells are residual embryonic myoblast precursors responsible for muscle growth and regeneration. In order to examine the role of satellite cells in the initial events of muscle regeneration, we placed individual mature rat muscle...

... E19–20. We suggest that changes in expression of MHC isoforms in primary myotubes depend on different populations of myoblasts fusing with the myotubes, and that the normal sequence of appearance of these myoblasts has a stage-dependent reliance on active innervation of foetal muscles. A critical...

... myoblast satellite cell laminin locomotion laminin receptor During development myoblasts repeatedly alter their interaction with their environment. Arising from stationary replicating cells in the somitic dermomyotome, they invade the peripheral mesenchyme and terminally differentiate and fuse...

... 04 1988 © 1988 by Company of Biologists 1988 myoblast migration inhibition chick embryo CSAT hybridoma integrin cell-substratum adhesion Avian integrin is a transmembrane heteromeric receptor which is capable of binding both extracellular matrix molecules...

...Colin D. Mccaig ABSTRACT The orientation of developing myoblasts extending a bipolar axis in the presence of explanted myoblasts or whole notochord has been studied in vitro . Myoblasts tended to elongate perpendicular to the lines of diffusion of substances from these tissues. A slow-release...