Modulation of glucocorticoid receptor activity by cyclic nucleotides and its implications on the regulation of human skin fibroblast growth and protein synthesis
Abstract
The modulation of glucocorticoid receptor activity by cyclic nucleotides was studied in cultured human skin fibroblasts. The receptors appeared to be activated in the presence of dibutyryl-cAMP and inactivated by dibutyryl-cGMP. Significantly, the cGMP content of the fibroblasts increased during cell growth, with a concomitant decrease in the glucocorticoid receptor activity, while when the cells reached early confluency the decrease in cGMP content was accompanied by an increase in cAMP and increased activity of the glucocorticoid receptors. In addition, cortisol induced (2'-5')oligoadenylate synthetase in these cells and raised the cellular (2'-5')oligoadenylate concentrations. This resulted in a decrease in both DNA and protein synthesis activity in the cells, a response which correlated with the (2'-5')oligoadenylate concentration. The combination of cortisol and dibutyryl-cAMP had a synergetic stimulatory effect on the (2'-5')oligoadenylate concentration and a synergetic inhibitory effect on protein synthesis. In conclusion, it is demonstrated here that cyclic nucleotides can modulate glucocorticoid receptor activity in cultured human skin fibroblasts, and thus these compounds may indirectly affect cellular metabolism by regulating the cellular responses to glucocorticoids.
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Release of cortisol is typically coupled to release of norepinephrine, which leads to stronger signalling through the beta adrenoceptor.
“Release of cortisol is typically coupled to release of norepinephrine, which leads to stronger signalling through the b adrenoceptor; several studies have shown cooperation of cortisol and norepinephrine at a molecular level.”
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- Authors
- Oikarinen, J., Hämäläinen, L., & Oikarinen, A.
- Affiliations
- University of Oulu (FI)
- Venue
- Biochimica et Biophysica Acta (BBA) - General Subjects
- Publisher
- Elsevier BV
- Published
- 1984-06
- Volume
- 799
- Issue
- 2
- Pages
- 158-165
- ISSN
- 0304-4165 (ISSN-L)
- OpenAlex
- W2080931570
- Cited by
- 62
- References
- 30
- Citations by year
- 2023: 1 · 2022: 1 · 2019: 1 · 2015: 3 · 2014: 2 · 2013: 1
- FWCI
- 2.67
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Biochimica et Biophysica Acta (BBA) - General Subjects (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Medical Research Council
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Estrogen and related hormone effects
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Receptor Mechanisms and Signaling
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Phosphodiesterase function and regulation
- Keywords
- glucocorticoid receptor, cyclic nucleotides, cyclic AMP, cyclic GMP, dermal fibroblasts, cortisol, 2',5'-oligoadenylate synthetase, 2',5'-oligoadenylate, protein synthesis, DNA synthesis, cell growth, receptor modulation
- MeSH terms
- Adenine Nucleotides, Cells, Cultured, Dexamethasone, Bucladesine, Dibutyryl Cyclic GMP, Fibroblasts, Cyclic GMP, Humans, Hydrocortisone, Oligoribonucleotides, Receptors, Glucocorticoid, Receptors, Steroid, Skin, Protein Biosynthesis, 2',5'-Oligoadenylate Synthetase
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