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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
11
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pubmed:dateCreated |
1997-11-24
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pubmed:abstractText |
Transforming growth factor-beta (TGFbeta) plays an important role in bone development and remodeling. TGFbeta stimulates PGE2 production, enhances interleukin-1-stimulated PGE2 production, and can stimulate PG-mediated bone resorption. We found that TGFbeta induced prostaglandin G/H synthase (PGHS-2) messenger RNA (mRNA) and PGE2 production in neonatal mouse calvarial cultures and in primary cells derived from these calvariae. We used MC3T3-E1 cells, an immortalized osteoblastic cell line derived from mouse calvariae, to examine the mechanism of PGHS-2 induction. PGHS-2 mRNA was rapidly induced by TGFbeta (10 ng/ml) in MC3T3-E1 cells; mRNA levels peaked at 4-8 h and were still elevated at 24 h. Induction of PGHS-2 protein and PGE2 production correlated with PGHS-2 mRNA levels. In contrast, TGFbeta had much less effect on PGHS-1 mRNA levels. Unlike the response to other agonists, PGHS-2 mRNA induction by TGFbeta was not enhanced by cycloheximide pretreatment, suggesting a requirement for new protein synthesis. To study transcriptional regulation, cells were stably transfected with a PGHS-2 promoter-luciferase reporter construct containing 371 bp of the 5'-flanking region and 70 bp of untranslated DNA from the PGHS-2 gene. TGFbeta-stimulated luciferase activity paralleled PGHS-2 mRNA induction. Stimulation of luciferase activity and PGHS-2 mRNA levels by other agonists, including interleukin-1, TGF alpha, forskolin, and phorbol 13-myristate 12-acetate, were enhanced by TGFbeta. A 90% drop in luciferase activity occurred with deletion of the region from -371 to -213 bp of the PGHS-2 promoter. The PG response to TGFbeta in MC3T3-E1 cells appears to be mediated primarily by transcriptional regulation of PGHS-2 expression through one or more cis-acting elements located between -371 and -213 bp in the 5'-flanking region of the PGHS-2 gene.
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pubmed:grant | |
pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
AIM
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pubmed:chemical |
http://linkedlifedata.com/resource/pubmed/chemical/Cycloheximide,
http://linkedlifedata.com/resource/pubmed/chemical/Cyclooxygenase 2,
http://linkedlifedata.com/resource/pubmed/chemical/Dinoprostone,
http://linkedlifedata.com/resource/pubmed/chemical/Interleukin-1,
http://linkedlifedata.com/resource/pubmed/chemical/Isoenzymes,
http://linkedlifedata.com/resource/pubmed/chemical/Membrane Proteins,
http://linkedlifedata.com/resource/pubmed/chemical/PTGS2 protein, human,
http://linkedlifedata.com/resource/pubmed/chemical/Prostaglandin-Endoperoxide Synthases,
http://linkedlifedata.com/resource/pubmed/chemical/RNA, Messenger,
http://linkedlifedata.com/resource/pubmed/chemical/Recombinant Proteins,
http://linkedlifedata.com/resource/pubmed/chemical/Transforming Growth Factor beta
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pubmed:status |
MEDLINE
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pubmed:month |
Nov
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pubmed:issn |
0013-7227
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:volume |
138
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
4672-82
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pubmed:dateRevised |
2008-11-21
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pubmed:meshHeading |
pubmed-meshheading:9348193-Animals,
pubmed-meshheading:9348193-Cell Line,
pubmed-meshheading:9348193-Chromosome Mapping,
pubmed-meshheading:9348193-Cycloheximide,
pubmed-meshheading:9348193-Cyclooxygenase 2,
pubmed-meshheading:9348193-Dinoprostone,
pubmed-meshheading:9348193-Gene Amplification,
pubmed-meshheading:9348193-Humans,
pubmed-meshheading:9348193-Interleukin-1,
pubmed-meshheading:9348193-Isoenzymes,
pubmed-meshheading:9348193-Membrane Proteins,
pubmed-meshheading:9348193-Mice,
pubmed-meshheading:9348193-Mice, Inbred Strains,
pubmed-meshheading:9348193-Osteoblasts,
pubmed-meshheading:9348193-Phenotype,
pubmed-meshheading:9348193-Promoter Regions, Genetic,
pubmed-meshheading:9348193-Prostaglandin-Endoperoxide Synthases,
pubmed-meshheading:9348193-RNA, Messenger,
pubmed-meshheading:9348193-Recombinant Proteins,
pubmed-meshheading:9348193-Transforming Growth Factor beta
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pubmed:year |
1997
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pubmed:articleTitle |
Transforming growth factor-beta1 regulation of prostaglandin G/H synthase-2 expression in osteoblastic MC3T3-E1 cells.
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pubmed:affiliation |
Department of Medicine, University of Connecticut Health Center, Farmington 06030, USA. pilbeam@nso.uchc.edu
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pubmed:publicationType |
Journal Article,
Research Support, U.S. Gov't, P.H.S.
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