1. Imperatorin Suppresses Degranulation and Eicosanoid Generation in Activated Bone Marrow-Derived Mast Cells
- Author
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Kyu-Tae Jeong, Jiean Lee, Sun-Gun Kim, Na-Young Park, Eujin Lee, Youn Ju Lee, Eunkyung Lee, and Hyo-Hyun Park
- Subjects
Pharmacology ,Immunoglobulin E ,Biochemistry ,Allergic inflammation ,Phospholipase Cγ1 ,chemistry.chemical_compound ,Phospholipase A2 ,Cytosolic phospholipase A2 ,Drug Discovery ,Medicine ,Mitogen-activated protein kinases ,biology ,Leukotriene C4 ,business.industry ,Imperatorin ,Prostaglandin D2 ,Degranulation ,Eicosanoid ,chemistry ,biology.protein ,Molecular Medicine ,lipids (amino acids, peptides, and proteins) ,Original Article ,business - Abstract
Imperatorin has been known to exert many biological functions including anti-inflammatory activity. In this study, we investigated the inhibitory effects of imperatorin on the production of inflammatory mediators in mouse bone marrow-derived mast cells (BMMC). Imperatorin inhibited degranulation and the generation of eicosanoids (leukotriene C4 (LTC4) and prostaglandin D2 (PGD2)) in IgE/antigen (Ag)-stimulated BMMC. To elucidate the molecular mechanism involved in this process, we investigated the effect of imperatorin on intracellular signaling in BMMC. Biochemical analyses of the IgE/Ag-mediated signaling pathway demonstrated that imperatorin dramatically attenuated degranulation and the production of 5-lipoxygenase-dependent LTC4 and cyclooxygenase-2-dependent PGD2 through the inhibition of intracellular calcium influx/phospholipase Cγ1, cytosolic phospholipase A2/mitogen-activated protein kinases and/or nuclear factor-κB pathways in BMMC. These results suggest that the effects of imperatorin on inhibition of degranulation and eicosanoid generation through the suppression of multiple steps of IgE/Ag-mediated signaling pathways would be beneficial for the prevention of allergic inflammation.
- Published
- 2015