In vivo analyzes of dystroglycan function during somitogenesis in Xenopus laevis. 2009

Magdalena Hidalgo, and Cathy Sirour, and Valérie Bello, and Nicole Moreau, and Michèle Beaudry, and Thierry Darribère
Université Pierre et Marie Curie Paris 6 UMR CNRS 7622, Laboratoire de Biologie du Développement, équipe Matrice Extracellulaire et Développement, Paris, France.

Dystroglycan (Dg) is a cell adhesion receptor for laminin that has been reported to play a role in skeletal muscle cell stability, cytoskeletal organization, cell polarity, and signaling. Here we show that Dg is expressed at both the notochord/somite and the intersomitic boundaries, where laminin and fibronectin are accumulated during somitogenesis. Inhibition of Dg function with morpholino antisense oligonucleotides or a dominant negative mutant results in the normal segmentation of the presomitic mesoderm but affects the number, the size, and the integrity of somites. Depletion of Dg disrupts proliferation and alignment of myoblasts without affecting XMyoD and XMRF4 expression. It also leads to defects in laminin deposition at the intersomitic junctions, whereas expression of integrin beta1 subunits and fibronectin assembly occur normally. Our results show that Dg is critical for both proliferation and elongation of somitic cells and that the Dg-cytoplasmic domain is required for the laminin assembly at the intersomitic boundaries. Developmental Dynamics 238:1332-1345, 2009. (c) 2008 Wiley-Liss, Inc.

UI MeSH Term Description Entries
D007797 Laminin Large, noncollagenous glycoprotein with antigenic properties. It is localized in the basement membrane lamina lucida and functions to bind epithelial cells to the basement membrane. Evidence suggests that the protein plays a role in tumor invasion. Merosin,Glycoprotein GP-2,Laminin M,Laminin M Chain,Chain, Laminin M,Glycoprotein GP 2,M Chain, Laminin
D009024 Morphogenesis The development of anatomical structures to create the form of a single- or multi-cell organism. Morphogenesis provides form changes of a part, parts, or the whole organism.
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D014982 Xenopus laevis The commonest and widest ranging species of the clawed "frog" (Xenopus) in Africa. This species is used extensively in research. There is now a significant population in California derived from escaped laboratory animals. Platanna,X. laevis,Platannas,X. laevi
D015398 Signal Transduction The intracellular transfer of information (biological activation/inhibition) through a signal pathway. In each signal transduction system, an activation/inhibition signal from a biologically active molecule (hormone, neurotransmitter) is mediated via the coupling of a receptor/enzyme to a second messenger system or to an ion channel. Signal transduction plays an important role in activating cellular functions, cell differentiation, and cell proliferation. Examples of signal transduction systems are the GAMMA-AMINOBUTYRIC ACID-postsynaptic receptor-calcium ion channel system, the receptor-mediated T-cell activation pathway, and the receptor-mediated activation of phospholipases. Those coupled to membrane depolarization or intracellular release of calcium include the receptor-mediated activation of cytotoxic functions in granulocytes and the synaptic potentiation of protein kinase activation. Some signal transduction pathways may be part of larger signal transduction pathways; for example, protein kinase activation is part of the platelet activation signal pathway. Cell Signaling,Receptor-Mediated Signal Transduction,Signal Pathways,Receptor Mediated Signal Transduction,Signal Transduction Pathways,Signal Transduction Systems,Pathway, Signal,Pathway, Signal Transduction,Pathways, Signal,Pathways, Signal Transduction,Receptor-Mediated Signal Transductions,Signal Pathway,Signal Transduction Pathway,Signal Transduction System,Signal Transduction, Receptor-Mediated,Signal Transductions,Signal Transductions, Receptor-Mediated,System, Signal Transduction,Systems, Signal Transduction,Transduction, Signal,Transductions, Signal
D016376 Oligonucleotides, Antisense Short fragments of DNA or RNA that are used to alter the function of target RNAs or DNAs to which they hybridize. Anti-Sense Oligonucleotide,Antisense Oligonucleotide,Antisense Oligonucleotides,Anti-Sense Oligonucleotides,Anti Sense Oligonucleotide,Anti Sense Oligonucleotides,Oligonucleotide, Anti-Sense,Oligonucleotide, Antisense,Oligonucleotides, Anti-Sense
D017403 In Situ Hybridization A technique that localizes specific nucleic acid sequences within intact chromosomes, eukaryotic cells, or bacterial cells through the use of specific nucleic acid-labeled probes. Hybridization in Situ,Hybridization, In Situ,Hybridizations, In Situ,In Situ Hybridizations
D049030 Dystroglycans Dystrophin-associated proteins that play role in the formation of a transmembrane link between laminin-2 and DYSTROPHIN. Both the alpha and the beta subtypes of dystroglycan originate via POST-TRANSLATIONAL PROTEIN PROCESSING of a single precursor protein. Dystroglycan,Cranin,Dystroglycan 1,Dystrophin-Associated Glycoprotein 1,alpha-Dystroglycan,beta-Dystroglycan,Dystrophin Associated Glycoprotein 1,alpha Dystroglycan,beta Dystroglycan
D049109 Cell Proliferation All of the processes involved in increasing CELL NUMBER including CELL DIVISION. Cell Growth in Number,Cellular Proliferation,Cell Multiplication,Cell Number Growth,Growth, Cell Number,Multiplication, Cell,Number Growth, Cell,Proliferation, Cell,Proliferation, Cellular
D019170 Somites Paired, segmented masses of MESENCHYME located on either side of the developing spinal cord (neural tube). Somites derive from PARAXIAL MESODERM and continue to increase in number during ORGANOGENESIS. Somites give rise to SKELETON (sclerotome); MUSCLES (myotome); and DERMIS (dermatome). Somite

Related Publications

Magdalena Hidalgo, and Cathy Sirour, and Valérie Bello, and Nicole Moreau, and Michèle Beaudry, and Thierry Darribère
May 2008, Developmental biology,
Magdalena Hidalgo, and Cathy Sirour, and Valérie Bello, and Nicole Moreau, and Michèle Beaudry, and Thierry Darribère
December 2002, Mechanisms of development,
Magdalena Hidalgo, and Cathy Sirour, and Valérie Bello, and Nicole Moreau, and Michèle Beaudry, and Thierry Darribère
November 2002, Gene expression patterns : GEP,
Magdalena Hidalgo, and Cathy Sirour, and Valérie Bello, and Nicole Moreau, and Michèle Beaudry, and Thierry Darribère
August 2006, Zoological science,
Magdalena Hidalgo, and Cathy Sirour, and Valérie Bello, and Nicole Moreau, and Michèle Beaudry, and Thierry Darribère
April 1996, Molecular reproduction and development,
Magdalena Hidalgo, and Cathy Sirour, and Valérie Bello, and Nicole Moreau, and Michèle Beaudry, and Thierry Darribère
July 2003, Development genes and evolution,
Magdalena Hidalgo, and Cathy Sirour, and Valérie Bello, and Nicole Moreau, and Michèle Beaudry, and Thierry Darribère
May 1989, Differentiation; research in biological diversity,
Magdalena Hidalgo, and Cathy Sirour, and Valérie Bello, and Nicole Moreau, and Michèle Beaudry, and Thierry Darribère
February 1992, Developmental dynamics : an official publication of the American Association of Anatomists,
Magdalena Hidalgo, and Cathy Sirour, and Valérie Bello, and Nicole Moreau, and Michèle Beaudry, and Thierry Darribère
January 2008, Advances in experimental medicine and biology,
Magdalena Hidalgo, and Cathy Sirour, and Valérie Bello, and Nicole Moreau, and Michèle Beaudry, and Thierry Darribère
August 1981, Journal of embryology and experimental morphology,
Copied contents to your clipboard!