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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
5 Pt 1
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pubmed:dateCreated |
1994-12-7
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pubmed:abstractText |
We have characterized the effects of glucocorticoids on gene expression of the cholecystokinin A receptor (CCK-R) using a cloned cDNA probe in the rat pancreatic acinar cell line AR42J. Dexamethasone (100 nM) resulted in a transient, time-dependent increase of CCK-R mRNA, with a maximal induction observed after 3 h of hormone treatment (238 +/- 29% of controls, n = 4). Further incubation with dexamethasone resulted in a subsequent decrease of CCK-R mRNA concentrations, which reached control values after 12 h of hormonal treatment. The increase of CCK-R mRNA was dose dependent with half-maximal effects observed at 10 nM and maximal effects observed at 100 nM of hormone. We next investigated the molecular mechanisms by which glucocorticoids induce CCK-R gene expression. Nuclear run-on analysis revealed that dexamethasone pretreatment had no significant effect on CCK-R gene transcription. Using actinomycin D, we determined the half-life for the mRNA of the CCK-R. Dexamethasone (100 nM) pretreatment for 3 h resulted in a significant increase of CCK-R mRNA stability, with a half-life of 240 min compared with 120 min in untreated control cells. These data therefore suggest that glucocorticoids transiently stimulate CCK-R mRNA concentrations by increasing the mRNA stability without affecting the receptor transcription rate.
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pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:chemical | |
pubmed:status |
MEDLINE
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pubmed:month |
Nov
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pubmed:issn |
0002-9513
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:volume |
267
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
G772-7
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pubmed:dateRevised |
2006-11-15
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pubmed:meshHeading |
pubmed-meshheading:7977738-Animals,
pubmed-meshheading:7977738-Cell Line,
pubmed-meshheading:7977738-Dexamethasone,
pubmed-meshheading:7977738-Drug Stability,
pubmed-meshheading:7977738-Gene Expression,
pubmed-meshheading:7977738-Half-Life,
pubmed-meshheading:7977738-Pancreas,
pubmed-meshheading:7977738-RNA, Messenger,
pubmed-meshheading:7977738-Rats,
pubmed-meshheading:7977738-Receptor, Cholecystokinin A,
pubmed-meshheading:7977738-Receptors, Cholecystokinin,
pubmed-meshheading:7977738-Time Factors,
pubmed-meshheading:7977738-Transcription, Genetic
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pubmed:year |
1994
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pubmed:articleTitle |
Transient stabilization of cholecystokinin A receptor mRNA by glucocorticoids in pancreatic AR42J cells.
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pubmed:affiliation |
Department of Gastroenterology, Medizinische Klinik und Poliklinik, Klinikum Steglitz, Freie Universität Berlin, Germany.
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pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
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