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Pathophysiological effects of glucocorticoids on nasal polyps: an update.
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- Benson, Mikael, 1954 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för kvinnors och barns hälsa, Avdelningen för pediatrik,Institute for the Health of Women and Children, Dept of Paediatrics,Queen Silvia Children's Hospital, Gothenburg, Sweden
- (creator_code:org_t)
- Lippincott Williams & Wilkins, 2005
- 2005
- Engelska.
- Ingår i: Current opinion in allergy and clinical immunology. - : Lippincott Williams & Wilkins. - 1528-4050 .- 1473-6322. ; 5:1, s. 31-5
- Forskningsöversikt (refereegranskat)
Abstract
Ämnesord
Stäng
- PURPOSE OF REVIEW: The exact mechanisms by which glucocorticoids exert their beneficial effects on nasal polyps are not clearly defined. Nasal polyps, asthma and allergic rhinitis share common features such as mucosal infiltration with eosinophils and mast cells as well as local IgE production. The present review is an update on the pathophysiological mechanisms of glucocorticoids on nasal polyps described during the last 2 years. RECENT FINDINGS: The reduction of leukocyte numbers in nasal polyps following glucocorticoid treatment depends on several mechanisms, for example altered balance between the two isoforms of the human glucocorticoid receptors, GRalpha and GRbeta. Another explanation may be inhibition of CD4+ T by CD8+ T cells. Increased expression of the antiinflammatory cytokine transforming growth factor beta may contribute to this. A DNA microarray study which examined the expression of some 22 000 genes showed increased expression of several antiinflammatory genes in nasal polyps after treatment with glucocorticoids. The antiinflammatory gene that increased most was uteroglobin (also known as Clara cell protein 16) which is abundantly expressed in airway secretions and thought to have an important role in regulating inflammation. SUMMARY: Glucocorticoids affect both pro and antiinflammatory pathways in nasal polyps. Upregulation of antiinflammatory genes such as transforming growth factor beta and uteroglobin may play an important role. Elucidation of these mechanisms may help us to understand not only the effects of glucocorticoids on nasal polyps, but also on related disorders such as allergic rhinitis and asthma.
Nyckelord
- Cytokines
- genetics
- immunology
- Glucocorticoids
- pharmacology
- therapeutic use
- Humans
- Nasal Polyps
- drug therapy
- genetics
- immunology
- Oligonucleotide Array Sequence Analysis
- glucocorticoids; microarray; nasal polyps.
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