Linked Life Data

8108123

Source:http://linkedlifedata.com/resource/pubmed/id/8108123

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1994-3-23
pubmed:abstractText
The expression of the retinoblastoma susceptibility (RB-1) gene was investigated in highly proliferating mouse embryonic stem (ES) cells and in slowly proliferating mouse embryonic fibroblasts. The RB protein was expressed at the same level in these two cell types. Mainly hyperphosphorylated RB was detected in exponentially-growing ES cells. Embryonic fibroblasts and embryonic stem cells were synchronized by colcemid block followed by mitotic shake-off. In embryonic fibroblasts, DNA replication started 10-15 h after exit from mitosis and RB was transiently dephosphorylated during the G1 phase as previously described. In ES cells, DNA replication started 2 h after release from the colcemid block but virtually no hypophosphorylated RB was observed after the release. Instead, there was a dramatic decrease in the total RB protein level between exit from mitosis and entry into S phase. These observations were made by using two different monoclonal antibodies, both in immunoblotting and immunoprecipitation experiments. Absence of hypophosphorylated RB and cell cycle-dependent change in total RB protein level may be relevant to the high proliferation rate and to the tumorigenic nature of mouse embryonic stem cells.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0950-9232
pubmed:author
pubmed:issnType
Print
pubmed:volume
9
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
809-18
pubmed:dateRevised
2007-11-15
pubmed:meshHeading
pubmed:year
1994
pubmed:articleTitle
Contrasting patterns of retinoblastoma protein expression in mouse embryonic stem cells and embryonic fibroblasts.
pubmed:affiliation
Laboratoire de Biologie Moléculaire et Cellulaire, CNRS UM R49, INRA, Ecole Normale Supérieure de Lyon, France.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't