A549 기도상피세포에서 IL-8 전사와 분비에 미치는 Dexamethasone과 Troglitazone의 병합투여효과
Background: Glucocorticoid is a widely used anti-inflammatory agent in a variety of diseases. Recently, peroxisome proliferator activated receptor γ (PPARγ) ligand has been shown to exert a potential anti-inflammatory activity, mainly through their ability to down- regulate pro-inflammatory gene exp...
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Published in | Chʻŏnsik mit alrerugi Vol. 28; no. 4; pp. 292 - 297 |
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Main Authors | , , , , , , , , , , , , , , , |
Format | Journal Article |
Language | Korean |
Published |
대한천식알레르기학회
30.12.2008
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Subjects | |
Online Access | Get full text |
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Summary: | Background: Glucocorticoid is a widely used anti-inflammatory agent in a variety of diseases. Recently, peroxisome proliferator activated receptor γ (PPARγ) ligand has been shown to exert a potential anti-inflammatory activity, mainly through their ability to down- regulate pro-inflammatory gene expressions. Objective This study was designed to evaluate the effects of co-treatment with dexamethasone and troglitazone (a ligand of PPARγ) on IL-8 transcription and secretion. Method: Steroid and troglitazone-induced transactivation was measured by using pGRE luciferase reporter gene in the A549 cell line. Steroid-induced transrepression was measured by using stable A549 IgG-NFκB luciferase cell line, which contained the minimal IL-8 promoter region. Result: Co-treatment with dexamethasone and troglitazone showed no additional increase of transactivation activity compared to dexamethasone single treatment. Suppressions of the transcriptional activity in the IL-8 promotor and IL-8 secretion showed no difference in the co-treatment with dexamethasone and troglitazone compared to those in dexamethasone single treatment. Conclusion: Our results suggest that co-treatment with PPARγ ligand and steroid may not have an additive anti-inflammatory activity at least in the airway epithelial cell. (Korean J Asthma Allergy Clin Immunol 2008;28:292-297) |
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Bibliography: | The Official Publication of the Korean Society of Allergology |
ISSN: | 1226-8739 |