Erschienen in:
01.10.2009 | Original Research Paper
Heme oxygenase-1 mediates the anti-allergic actions of quercetin in rodent mast cells
verfasst von:
Miyoko Matsushima, Kenzo Takagi, Miyuki Ogawa, Etsuko Hirose, Yui Ota, Fumie Abe, Kenji Baba, Takaaki Hasegawa, Yoshinori Hasegawa, Tsutomu Kawabe
Erschienen in:
Inflammation Research
|
Ausgabe 10/2009
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Abstract
Objective and design
We investigated the involvement of heme oxygenase (HO)-1 in the anti-allergic action of quercetin against degranulation of rat basophilic leukemia (RBL-2H3) cells, rat peritoneal mast cells, and mouse bone marrow-derived mast cells.
Methods
The strength of allergic reaction was evaluated by the extent of degranulation in mast cells sensitized with various stimulants. The levels of HO-1, HO-2, and nuclear factor erythroid 2-related factor 2 (Nrf2) expressions were determined by quantitative RT-PCR, western blotting, or immunocytochemistry.
Results
Heme oxygenase activity was upregulated after short exposure to quercetin, followed by the induction of HO-1 expression after long exposure to quercetin. The inhibition of degranulation by quercetin was reversed using tin protoporphyrin IX (SnPP), an HO-1 inhibitor. HO-1 metabolites, bilirubin and CO, led to inhibit degranulation, and quercetin translocated Nrf2 from cytoplasm into nucleus in RBL-2H3 cells.
Conclusion
These results strongly suggest that quercetin exerted anti-allergic actions via activation of Nrf2-HO-1 pathway.