Linked Life Data

11319865

Source:http://linkedlifedata.com/resource/pubmed/id/11319865

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2001-4-26
pubmed:abstractText
During mouse blastocyst formation, a layer of outer cells differentiates in less than 48 h into a functional epithelium (the trophectoderm). Ezrin, an actin-binding structural component of microvilli in epithelial cells, is also involved in signal transduction and ionic pump control. In the mouse embryo, ezrin becomes restricted to the apical cortex of all blastomeres at compaction and of outer cells at later stages. Here we investigated the function of ezrin in living embryos during epithelial differentiation using mutant forms of ezrin tagged with green fluorescent protein (GFP). GFP-tagged wild-type ezrin (Ez/GFPc) behaved like endogenous ezrin and did not interfere with development. Deletion of the last 53 amino acids (Delta53/GFP) changed the localization of ezrin: after compaction, Delta53/GFP remained associated with the apical and basolateral cortex in all blastomeres, and its expression slightly disturbed the cavitation process. Finally, full-length ezrin with GFP inserted at position 234 (Ez/GFPi) was localized all around the cortex throughout development, although it was concentrated at the apical pole after compaction. In embryos expressing Ez/GFPi, the duration of the 16-cell stage was reduced, while the onset of cavitation was delayed. Moreover, cavitation was abnormal, and the blastocoele was small and retracted almost completely several times as if there were major leakages of blastocoelic fluid. Our results suggest that, in addition to its role in microvilli organization, ezrin is involved in the formation of a functional epithelium through a still unknown mechanism.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0012-1606
pubmed:author
pubmed:copyrightInfo
Copyright 2001 Academic Press.
pubmed:issnType
Print
pubmed:day
1
pubmed:volume
233
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
161-73
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2001
pubmed:articleTitle
In vivo functional analysis of ezrin during mouse blastocyst formation.
pubmed:affiliation
Laboratoire de Biologie Cellulaire du Développement, UMR 7622, CNRS-Université Pierre et Marie Curie, 9 quai Saint-Bernard, Paris Cedex 05, 75252, France.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't