The selective glucocorticoid receptor antagonist CORT125281 has tissue-specific activity
| Autor: | Menno Hoekstra, Hazel Hunt, Jan Kroon, Eva M.G. Viho, Lisa L. Koorneef, Kim M L Heckmans, Onno C. Meijer, René Houtman, Lucas F Wahl, Marloes M A R van Dorst |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0301 basic medicine
medicine.medical_specialty Hypothalamo-Hypophyseal System Endocrinology Diabetes and Metabolism Adipose Tissue White mifepristone Pituitary-Adrenal System 030209 endocrinology & metabolism Hyperlipidemias coregulators White adipose tissue Adrenocorticotropic hormone Hippocampus 03 medical and health sciences chemistry.chemical_compound Mice 0302 clinical medicine Endocrinology Glucocorticoid receptor Receptors Glucocorticoid Proopiomelanocortin Adipose Tissue Brown Corticosterone Internal medicine Hyperinsulinism Brown adipose tissue medicine Hyperinsulinemia glucocorticoid receptor Animals tissue-specificity biology Antiglucocorticoid Muscles Research corticosterone medicine.disease GR antagonist 030104 developmental biology medicine.anatomical_structure chemistry Liver HPA-axis biology.protein RU486 |
| Zdroj: | The Journal of Endocrinology Journal of Endocrinology, 246(1), 79-92 Journal of Endocrinology, 246(1), 79-92. BIOSCIENTIFICA LTD |
| Popis: | Glucocorticoids mediate numerous essential processes in the human body via binding to the glucocorticoid receptor (GR). Excessive GR signaling can cause disease, and GR antagonists can be used to treat many symptoms of glucocorticoid-induced pathology. The purpose of this study was to characterize the tissue-specific properties of the selective GR antagonist CORT125281. We evaluated the antagonistic effects of CORT125281 upon acute and subchronic corticosterone exposure in mice. In the acute corticosterone setting, hypothalamus-pituitary-adrenal-axis activity was investigated by measurement of basal- and stress-induced corticosterone levels, adrenocorticotropic hormone levels and pituitary proopiomelanocortin expression. GR signaling was evaluated by RT-PCR analysis of GR-responsive transcripts in liver, muscle, brown adipose tissue (BAT), white adipose tissue (WAT) and hippocampus. Pretreatment with a high dose of CORT125281 antagonized GR activity in a tissue-dependent manner. We observed complete inhibition of GR-induced target gene expression in the liver, partial blockade in muscle and BAT and no antagonism in WAT and hippocampus. Tissue distribution only partially explained the lack of effective antagonism. CORT125281 treatment did not disinhibit the hypothalamus-pituitary-adrenal neuroendocrine axis. In the subchronic corticosterone setting, CORT125281 partially prevented corticosterone-induced hyperinsulinemia, but not hyperlipidemia and immune suppression. In conclusion, CORT125281 antagonizes GR transcriptional activity in a tissue-dependent manner and improves corticosterone-induced hyperinsulinemia. Tailored dosing of CORT125281 may allow tissue-specific inhibition of GR transcriptional activity. |
| Databáze: | OpenAIRE |
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