Linked Life Data

16887818

Source:http://linkedlifedata.com/resource/pubmed/id/16887818

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
17
pubmed:dateCreated
2006-8-15
pubmed:abstractText
In the postimplantation mouse embryo, axial patterning begins with the restriction of expression of a set of genes to the distal visceral endoderm (DVE). This proximodistal (PD) axis is subsequently transformed into an anteroposterior axis as the VE migrates anteriorly to form the anterior visceral endoderm (AVE). Both Nodal and Wnt signaling pathways are involved in these events. We show here that loss of function in the adenomatous polyposis coli gene (Apc) leads to constitutive beta-catenin activity that induces a proximalization of the epiblast with the activation of a subset of posterior mesendodermal genes, and loss of ability to induce the DVE. The loss of some DVE genes such as Hex and goosecoid is rescued in chimeras where only the epiblast was wild type; however, these DVE markers were no longer restricted distally but covered the entire epiblast. Thus, the Apc gene is needed in both embryonic and extraembryonic lineages for normal PD patterning around implantation, suggesting that early restricted activation of the Wnt pathway may be important for initiating axial asymmetries. In addition, we found that nuclear beta-catenin and other molecular markers are asymmetrically expressed by 4.5 days.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0950-1991
pubmed:author
pubmed:issnType
Print
pubmed:volume
133
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
3379-87
pubmed:meshHeading
pubmed:year
2006
pubmed:articleTitle
Disruption of early proximodistal patterning and AVE formation in Apc mutants.
pubmed:affiliation
Samuel Lunenfeld Research Institute, Mount Sinai Hospital, University of Toronto, 600 University Avenue, Toronto, Ontario, M5G 1X5, Canada.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't