Linked Life Data

15644420

Source:http://linkedlifedata.com/resource/pubmed/id/15644420

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
9
pubmed:dateCreated
2005-4-21
pubmed:abstractText
In vitro studies suggest that Ras activation is necessary for erythroid cell development. However, genetic inactivation of the Ras isoforms H-Ras, N-Ras, and K-Ras in mice reportedly did not affect adult or fetal erythropoiesis, though K-Ras(-/-) embryos were anemic. Given these discrepancies, we performed a more detailed analysis of fetal erythropoiesis in K-Ras(-/-) embryos. Day-13.5 K-Ras(-/-) embryos were pale with a marked reduction of mature erythrocytes in their fetal livers. The frequency and number of both early (erythroid burst-forming unit [BFU-E]) and late erythroid progenitors (erythroid colony-forming unit [CFU-E]) were reduced in K-Ras(-/-) fetal livers compared with wild-type controls and displayed a delay in terminal erythroid cell maturation. Further, K-Ras(-/-) hematopoietic progenitors had reduced proliferation in response to erythropoietin and Kit ligand compared with control cells. Thus, these studies identify K-Ras as a unique Ras isoform that is essential for regulating fetal erythropoiesis in vivo.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0006-4971
pubmed:author
pubmed:issnType
Print
pubmed:day
1
pubmed:volume
105
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
3538-41
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2005
pubmed:articleTitle
K-Ras is essential for normal fetal liver erythropoiesis.
pubmed:affiliation
Indiana University School of Medicine, Herman B Wells Center for Pediatric Research, 1044 W Walnut St R4/470, Indianapolis, IN 46202, USA.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't