Glucocorticoid receptor expression in human bronchial epithelial cells: effects of smoking and COPD
Previously, we found that inflammatory mediators modulated the number and binding affinity of glucocorticoid receptors (GR) in human bronchial epithelial cell lines . In this study we investigated whether smoking and chronic obstructive pulmonary disease (COPD), both characterized by airway inflamma...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
1998-01-01
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| Series: | Mediators of Inflammation |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/09629359890965 |
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| Summary: | Previously, we found that inflammatory mediators modulated the number and binding affinity of glucocorticoid receptors (GR) in human bronchial epithelial cell lines . In this study we investigated whether smoking and chronic obstructive pulmonary disease (COPD), both characterized by airway inflammation with increased levels of inflammatory mediators , affect GR characteristics in cultured human bronchial
epithelial cells (HBEC). A statisticallys ignificant difference was found be tween the dissociation constant
(Kd) values in HBEC from smoking (Kd = 0.98 ± 0.08 nM; n=6) and nonsmoking controls (Kd = 0.76 ± 0.10 nM, p=0.03; n=5), but no significant difference was found between the mean number of binding sites . Our results are the first indication that cultured HBEC from smokers possess GR with a lower binding affinity. This may result from the in flammation found in the airways from smokers . Further more, these results provide furthere vidence that the bronchial
epithelium may be an actual target for inhaled glucocor ticoid therapy. |
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| ISSN: | 0962-9351 1466-1861 |