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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Balazs, Zoltan Schweizer, Roberto A. S. Frey, Felix J. Rohner-Jeanrenaud, Françoise Odermatt, Alex |
| Description | Country affiliation: Switzerland Author Affiliation: Balazs Z ( Institute of Molecular and Systems Toxicology, Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, CH-4056 Basel, Switzerland.) |
| Abstract | 11beta-Hydroxysteroid dehydrogenase (11beta-HSD) type 1 and type 2 catalyze the interconversion of inactive and active glucocorticoids. Impaired regulation of these enzymes has been associated with obesity, diabetes, hypertension, and cardiovascular disease. Previous studies in animals and humans suggested that dehydroepiandrosterone (DHEA) has antiglucocorticoid effects, but the underlying mechanisms are unknown. In this study, DHEA treatment markedly increased mRNA expression and activity of 11beta-HSD2 in a rat cortical collecting duct cell line and in kidneys of C57BL/6J mice and Sprague-Dawley rats. DHEA-treated rats tended to have reduced urinary corticosterone to 11-dehydrocorticosterone ratios. It was found that CCAAT/enhancer-binding protein-alpha (C/EBP-alpha) and C/EBP-beta regulated HSD11B2 transcription and that DHEA likely modulated the transcription of 11beta-HSD2 in a phosphatidylinositol-3 kinase/Akt-dependent manner by increasing C/EBP-beta mRNA and protein expression. Moreover, it is shown that C/EBP-alpha and C/EBP-beta differentially regulate the expression of 11beta-HSD1 and 11beta-HSD2. In conclusion, DHEA induces a shift from 11beta-HSD1 to 11beta-HSD2 expression, increasing conversion from active to inactive glucocorticoids. This provides a possible explanation for the antiglucocorticoid effects of DHEA. |
| File Format | HTM / HTML |
| ISSN | 10466673 |
| e-ISSN | 15333450 |
| Journal | Journal of the American Society of Nephrology |
| Issue Number | 1 |
| Volume Number | 19 |
| Language | English |
| Publisher | American Society of Nephrology |
| Publisher Date | 2008-01-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Discipline Nephrology 11-beta-hydroxysteroid Dehydrogenase Type 2 Genetics Ccaat-enhancer-binding Proteins Metabolism Dehydroepiandrosterone Pharmacology Kidney Tubules, Collecting Enzymology Rna, Messenger Animals Enzyme Induction Drug Effects Gene Expression Regulation, Enzymologic Kidney Cortex Mice Mice, Inbred C57bl Rats, Sprague-dawley Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Nephrology |
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