Linked Life Data

19785007

Source:http://linkedlifedata.com/resource/pubmed/id/19785007

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
11
pubmed:dateCreated
2009-11-12
pubmed:abstractText
Multiple cell types arise from cells in the dermomyotome of the somite that express Pax3 and Pax7, and myogenesis is regulated by Notch signaling. The asymmetric cell fate determinant Numb is thought to promote differentiation of skeletal muscle and other lineages by negatively regulating Notch signaling. We used transgenesis to overexpress Numb spatiotemporally in Pax3(+)/Pax7(+) somitic stem and progenitor cells in mouse embryos using a spatiotemporally regulated enhancer element from the Myf5 locus that can target muscle progenitor cells prior to cell commitment. Molecular analyses as well as examination of dermal and skeletal muscle cell fates in vivo show that although Numb is thought to be associated with muscle differentiation, unexpectedly the common stem/progenitor pool size for these lineages is increased in Numb-transgenic embryos. Prospective isolation of the relevant transgenic cells and analysis by quantitative reverse-transcription polymerase chain reaction demonstrated that, in this context, canonical Notch targets are not significantly downregulated. These findings were corroborated using a Notch reporter mouse during the formation of somites and prior to lineage segregation. Thus, we propose that Numb can regulate the self-renewal of dermal and muscle progenitors during a lineage progression.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
1549-4918
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
27
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
2769-80
pubmed:meshHeading
pubmed-meshheading:19785007-Animals, pubmed-meshheading:19785007-Blotting, Western, pubmed-meshheading:19785007-Flow Cytometry, pubmed-meshheading:19785007-Green Fluorescent Proteins, pubmed-meshheading:19785007-Immunohistochemistry, pubmed-meshheading:19785007-In Situ Hybridization, pubmed-meshheading:19785007-Membrane Proteins, pubmed-meshheading:19785007-Mice, pubmed-meshheading:19785007-Mice, Transgenic, pubmed-meshheading:19785007-Mitosis, pubmed-meshheading:19785007-Muscle Development, pubmed-meshheading:19785007-Muscle Fibers, Skeletal, pubmed-meshheading:19785007-Nerve Tissue Proteins, pubmed-meshheading:19785007-Recombinant Fusion Proteins, pubmed-meshheading:19785007-Reverse Transcriptase Polymerase Chain Reaction, pubmed-meshheading:19785007-Somites, pubmed-meshheading:19785007-Stem Cells
pubmed:year
2009
pubmed:articleTitle
Numb promotes an increase in skeletal muscle progenitor cells in the embryonic somite.
pubmed:affiliation
Stem Cells & Development, Department of Developmental Biology Pasteur Institute, Centre National de la Recherche Scientifique (CNRS) URA 2578, 75724 Paris Cedex 15, France.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't