| Autor: |
Meisinger, Christof, Zeschnigk, Christine, Grothe, Claudia |
| Zdroj: |
Journal of Biological Chemistry; July 1996, Vol. 271 Issue: 28 p16520-16525, 6p |
| Abstrakt: |
In order to clarify the physiological function of fibroblast growth factor (FGF-2) in the adrenal medulla the regulation of FGF-2 and FGF receptor 1 (FGFR1) was studied in vitroand in vivoin response to glucocorticoids. To assess the effects of glucocorticoids, in vivoextracts of adrenal medulla and adrenal cortex were analyzed by RNase protection assay and Western blot analysis. PC12 cells were chosen as a model system to study the effects of glucocorticoids in vitro. In PC12 cells, dexamethasone (DEX) was found to stimulate dramatically the expression of both FGF-2 mRNA and protein. Western blot analysis revealed that exclusively the 21-kDa FGF-2 isoform was enhanced. In contrast to the FGF-2 mRNA level FGFR1 was not affected by treatment with glucocorticoids. In vivoFGF-2 mRNA level and 21-kDa FGF-2 isoform level are significantly enhanced in the adrenal medulla 24 h after DEX injection. In vivoapplication of DEX leads to an increase of the medullary and cortical FGFR1 transcript levels. Glucocorticoid effects on FGF-2 expression were not found in adrenal cortex, heart, skeletal muscle, and kidney, respectively, in vivoand in L6 rat myoblasts in vitro. |
| Databáze: |
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