期刊
CELLULAR AND MOLECULAR LIFE SCIENCES
卷 68, 期 21, 页码 3573-3587出版社
SPRINGER BASEL AG
DOI: 10.1007/s00018-011-0642-5
关键词
Eosinophils; Prostaglandins; Receptors; Chemotaxis; Reactive oxygen species; Degranulation
资金
- Austrian National Bank [11967, 13487]
- Austrian Science Fund FWF [P19424-B05, P22521-B18, P21004-B02]
- Franz Lanyar Foundation [315, 316, 343]
- AstraZeneca
- Almirall
- Medical University of Graz
- Austrian Science Fund (FWF) [P 21004, P 22521, P 22976] Funding Source: researchfish
- Austrian Science Fund (FWF) [P21004] Funding Source: Austrian Science Fund (FWF)
Accumulation of eosinophils in tissue is a hallmark of allergic inflammation. Here we observed that a selective agonist of the PGE(2) receptor EP4, ONO AE1-329, potently attenuated the chemotaxis of human peripheral blood eosinophils, upregulation of the adhesion molecule CD11b and the production of reactive oxygen species. These effects were accompanied by the inhibition of cytoskeletal rearrangement and Ca2+ mobilization. The involvement of the EP4 receptor was substantiated by a selective EP4 antagonist, which reversed the inhibitory effects of PGE(2) and the EP4 agonist. Selective kinase inhibitors revealed that the inhibitory effect of EP4 stimulation on eosinophil migration depended upon activation of PI 3-kinase and PKC, but not cAMP. Finally, we found that EP4 receptors are expressed by human eosinophils, and are also present on infiltrating leukocytes in inflamed human nasal mucosa. These data indicate that EP4 agonists might be a novel therapeutic option in eosinophilic diseases.
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