Differences in the glucocorticoid to progesterone receptor selectivity of inhaled glucocorticoids.
Article Details
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Issar M, Sahasranaman S, Buchwald P, Hochhaus G
Differences in the glucocorticoid to progesterone receptor selectivity of inhaled glucocorticoids.
Eur Respir J. 2006 Mar;27(3):511-6.
- PubMed ID
- 16507850 [ View in PubMed]
- Abstract
Due to the high affinity of new inhaled corticosteroids (ICS) towards the glucocorticoid receptor (GR), and because of the similarities between the binding domains of the GR and the progesterone receptor (PR), the present study focused on assessing the relative binding affinities (RBA) of glucocorticoids (systemic and ICS) to PR (RBAPR). By comparison with the affinities towards the GR (RBAGR) the binding selectivities were also assessed. In general, the selectivity of the investigated glucocorticoids showed a decreasing trend with increasing lipophilicity. When orally administered, less lipophilic glucocorticoids showed the highest selectivity, with RBAGR/RBAPR ratios of 1,375, 760 and 476 for betamethasone, beclomethasone and dexamethasone, respectively. For ICS, mometasone furoate, the most lipophilic steroid, was the least selective (1.1), followed by beclomethasone monopropionate (9), fluticasone propionate (12), triamcinolone acetonide (18), mometasone (25) and budesonide (44), which shows the highest selectivity among inhaled glucocorticoids. In conclusion, the present study revealed that there are differences in selectivity among commercially available glucocorticoids. Future clinical studies are needed to investigate whether the high affinity of some of the investigated glucocorticoids to the progesterone receptor is of clinical relevance.
DrugBank Data that Cites this Article
- Drug Targets
Drug Target Kind Organism Pharmacological Action Actions Beclomethasone dipropionate Glucocorticoid receptor Protein Humans YesAgonistDetails Flurandrenolide Glucocorticoid receptor Protein Humans YesAgonistDetails Fluticasone Mineralocorticoid receptor Protein Humans UnknownAntagonistDetails Fluticasone Progesterone receptor Protein Humans UnknownAgonistDetails Fluticasone furoate Mineralocorticoid receptor Protein Humans UnknownAntagonistDetails Fluticasone furoate Progesterone receptor Protein Humans UnknownAgonistDetails Fluticasone propionate Mineralocorticoid receptor Protein Humans UnknownAntagonistDetails Fluticasone propionate Progesterone receptor Protein Humans UnknownAgonistDetails Triamcinolone Glucocorticoid receptor Protein Humans YesAgonistDetails