Abstract:
:Peroxisome proliferator-activated receptor-gamma (PPARgamma) is a nuclear receptor that regulates lipid metabolism. Recently, PPARgamma was reported to be a negative regulator in the immune system. Eosinophils also express PPARgamma, however, the role of PPARgamma in eosinophil functions is not well understood. Surface expression of CD69 and eosinophil-derived neurotoxin (EDN) release are well-known activation markers of eosinophils. We investigated the effect of a PPARgamma agonist on human eosinophil functions such as IL-5-induced CD69 surface expression and EDN release. IL-5 significantly induced eosinophil CD69 surface expression analyzed using flow cytometry and EDN release measured by ELISA. IL-5-induced eosinophil CD69 surface expression and EDN release were significantly inhibited by the synthetic PPARgamma agonist troglitazone, and these effects were reversed by a PPARgamma antagonist. The PPARgamma agonist troglitazone has a potent inhibitory effect on activation and degranulation of eosinophils, and it may be a therapeutic modality for the treatment of allergic diseases.
journal_name
Pharmacologyjournal_title
Pharmacologyauthors
Matsuwaki Y,Ueki S,Adachi T,Oyamada H,Kamada Y,Yamaguchi K,Kanda A,Hamada K,Kayaba H,Chihara Jdoi
10.1159/000085034subject
Has Abstractpub_date
2005-07-01 00:00:00pages
169-73issue
4eissn
0031-7012issn
1423-0313pii
85034journal_volume
74pub_type
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