Skeletal muscle stem and progenitor cells: reconciling genetics and lineage |
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Authors: | Tajbakhsh Shahragim |
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Affiliation: | Stem Cells and Development, Department of Developmental Biology, CNRS URA 2578, Pasteur Institute [corrected] 25 rue du Dr. Roux, 75724 Paris 15, France. shaht@pasteur.fr |
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Abstract: | Skeletal muscle provides a unique paradigm for studying stem to differentiated cell transitions, as well as the acquisition of cellular identity. Embryological and genetic studies over the last decades have unveiled key signaling pathways and regulatory genes which are involved in this process. In the adult, regeneration from fiber-associated satellite cells as well as non-muscle cells have opened the perspective for cell therapy studies. Paradoxically, however, the lineage has remained largely elusive. Recent studies have provided clues regarding the cellular organization in this lineage. Furthermore, the complexity of the genetic networks regulating global and local myogenic programs can be correlated with location and lineage. Finally, prenatal and postnatal developmental strategies have similarities and differences which will also be highlighted. |
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Keywords: | Skeletal muscle stem cells Satellite cells Progenitors Pax3 Pax7 Myf5 Mrf4 Myod Asymmetric cell division Lineage |
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