201. Glucocorticoid receptors in bronchial epithelial cells in asthma.
- Author
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Vachier I, Chiappara G, Vignola AM, Gagliardo R, Altieri E, Térouanne B, Vic P, Bousquet J, Godard P, and Chanez P
- Subjects
- Administration, Oral, Adult, Aged, Albuterol analogs & derivatives, Albuterol therapeutic use, Anti-Inflammatory Agents administration & dosage, Anti-Inflammatory Agents therapeutic use, Asthma drug therapy, Biopsy, Bronchodilator Agents therapeutic use, Budesonide therapeutic use, Chronic Disease, Gene Expression Regulation, Glucocorticoids administration & dosage, Glucocorticoids therapeutic use, Granulocyte-Macrophage Colony-Stimulating Factor analysis, Granulocyte-Macrophage Colony-Stimulating Factor genetics, HSP90 Heat-Shock Proteins analysis, HSP90 Heat-Shock Proteins genetics, Humans, Intercellular Adhesion Molecule-1 analysis, Intercellular Adhesion Molecule-1 genetics, Middle Aged, Prednisone administration & dosage, Prednisone therapeutic use, Proteins analysis, RNA, Messenger analysis, RNA, Messenger genetics, Receptors, Glucocorticoid analysis, Salmeterol Xinafoate, Theophylline therapeutic use, Asthma pathology, Bronchi pathology, Bronchitis pathology, Epithelial Cells pathology, Receptors, Glucocorticoid genetics
- Abstract
The expression of the glucocorticoid receptor (GR) in untreated or in steroid-dependent asthmatic patients is poorly understood. We therefore studied GR mRNA and protein levels in bronchial biopsies obtained from seven untreated asthmatic patients, seven control volunteers, and seven patients with chronic bronchitis. We also studied in bronchial epithelial cells obtained by brushing from 13 untreated asthmatics, 18 steroid-dependent asthmatics, 11 control volunteers, and 12 patients with chronic bronchitis, GR and heat shock protein 90 kD (hsp90) mRNA as well as the immunoreactivity of GR, intercellular adhesion molecule (ICAM-1), and granulocyte macrophage-colony-stimulating factor (GM-CSF). GR mRNA and protein level was similar in all subject groups in both biopsies and bronchial epithelial cells. Hsp90 mRNA level was also similar in all subject groups. ICAM-1 expression was significantly increased in bronchial epithelial cells from untreated asthmatics, but ICAM-1 was not expressed in those from steroid-dependent asthmatic patients. GM-CSF expression was significantly increased in bronchial epithelial cells from untreated and steroid-dependent asthmatic patients. GR expression within the airways is unaltered by oral long-term steroid treatment in asthma, but the expression of some but not all specific markers for asthma is modified by oral steroid.
- Published
- 1998
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