Linked Life Data

15197188

Source:http://linkedlifedata.com/resource/pubmed/id/15197188

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
35
pubmed:dateCreated
2004-8-23
pubmed:abstractText
Midkine (MK) is expressed in a precise temporal-spatial pattern during lung morphogenesis; however, its role in pulmonary homeostasis is unknown. Increased MK staining and mRNA expression were observed in the lungs of hypoxia-susceptible CAST/eiJ mice during hypoxia. MK expression was induced by hypoxia in cell lines in vitro. Because the transcription factor hypoxiainducible factor-1alpha (HIF-1alpha) modulates cellular responses to hypoxia, we tested whether increased expression of MK in the lung was mediated by HIF-1alpha. HIF-1alpha enhanced the transcription of MK, acting on HIF-1alpha regulatory elements located in the MK gene promoter. Site-directed mutagenesis of the 3' HIF response element in the MK promoter blocked the stimulatory effects of HIF-1alpha. To directly assess the role of MK on lung morphogenesis, transgenic mice were generated in which MK was expressed in the respiratory epithelial cells of the developing lung. MK increased muscularization of small pulmonary arteries, increasing alpha-smooth muscle actin and caldesmon staining and the expression of myocardin. MK directly enhanced the expression of myocardin and the smooth muscle-specific genes alpha-smooth muscle actin, calponin, and SM-22 in vascular smooth muscle precursor cells. Expression of MK in the respiratory epithelium is regulated by hypoxia and HIF-1alpha. These data provide a model wherein the respiratory epithelium responds to hypoxia via HIF-1alpha-dependent regulation of MK, enhancing myocardin expression to influence pulmonary vascular gene expression.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0021-9258
pubmed:author
pubmed:issnType
Print
pubmed:day
27
pubmed:volume
279
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
37124-32
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed-meshheading:15197188-Actins, pubmed-meshheading:15197188-Animals, pubmed-meshheading:15197188-Anoxia, pubmed-meshheading:15197188-Carrier Proteins, pubmed-meshheading:15197188-Cell Line, Tumor, pubmed-meshheading:15197188-Cytokines, pubmed-meshheading:15197188-Epithelial Cells, pubmed-meshheading:15197188-Gene Expression Regulation, pubmed-meshheading:15197188-Genes, Reporter, pubmed-meshheading:15197188-Humans, pubmed-meshheading:15197188-Hypoxia-Inducible Factor 1, alpha Subunit, pubmed-meshheading:15197188-Lung, pubmed-meshheading:15197188-Mice, pubmed-meshheading:15197188-Mice, Transgenic, pubmed-meshheading:15197188-Muscle, Smooth, pubmed-meshheading:15197188-Mutagenesis, pubmed-meshheading:15197188-Mutagenesis, Site-Directed, pubmed-meshheading:15197188-Placenta, pubmed-meshheading:15197188-Plasmids, pubmed-meshheading:15197188-Promoter Regions, Genetic, pubmed-meshheading:15197188-Pulmonary Artery, pubmed-meshheading:15197188-Pulmonary Surfactant-Associated Protein C, pubmed-meshheading:15197188-Reverse Transcriptase Polymerase Chain Reaction, pubmed-meshheading:15197188-Time Factors, pubmed-meshheading:15197188-Transcription Factors, pubmed-meshheading:15197188-Transfection
pubmed:year
2004
pubmed:articleTitle
Midkine is regulated by hypoxia and causes pulmonary vascular remodeling.
pubmed:affiliation
Divisions of Pulmonary Biology and Human Genetics, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, 3333 Burnet Avenue, Cincinnati, OH 45229-3039, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.