Linked Life Data

17636235

Source:http://linkedlifedata.com/resource/pubmed/id/17636235

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
2007-7-19
pubmed:abstractText
Hypoxia has been identified as a major stress or in placental and fetal development. To test the hypothesis that hypoxic stress responses are associated with gene expression changes, the authors measured gene expression in the mouse placenta in response to 48 hours of hypoxia. Embryonic day 15.5 pregnant mice were exposed to 48 hours of hypoxia (10.5% O(2)), after which the Affymetrix Mouse 430A_2.0 array was used to measure gene expression changes in the placenta. The authors observed 171 probe sets, corresponding to 163 genes, that were regulated by hypoxia (P < .01). Ninety genes were upregulated, and 73 were downregulated. The authors functionally annotated the regulated genes and examined overrepresented functional categories. Among the upregulated and downregulated genes, several overrepresented functional categories were observed. Upregulated genes included those involved in metabolism, oxygen transport, proteolysis, cell death, metabolism of reactive oxygen species, and DNA methylation. Genes involved in transcription, cell cycle regulation, and cell structure were downregulated. Microarray analysis has allowed the description of the genetic responses to hypoxia in the mouse placenta. The observation that hypoxia upregulates reactive oxygen species metabolism, in conjunction with DNA methylation enzymes, suggests that hypoxia may contribute to long-term epigenetic changes in stressed fetal tissues and organs.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
1933-7205
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
14
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
223-33
pubmed:dateRevised
2008-1-21
pubmed:meshHeading
pubmed:year
2007
pubmed:articleTitle
Gene expression patterns in the hypoxic murine placenta: a role in epigenesis?
pubmed:affiliation
Center for Perinatal Biology, Department of Physiology and Obstetrics, Loma Linda University, School of Medicine, Loma Linda, California 92350, USA.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't, Research Support, N.I.H., Extramural