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Biosci Biotechnol Biochem. 2009 Aug;73(8):1773-8. Epub 2009 Aug 7.

Anti-allergic effect of a hot-water extract of quince (Cydonia oblonga).

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1
Laboratory of Food Bioscience, Faculty of Agriculture, Shinshu University, Nagano, Japan.

Abstract

We examined the effect of a crude hot-water extract (HW) of quince (Cydonia oblonga Miller) fruit on type I allergy in vivo and in vitro. The oral administration of the quince HW-added diet to NC/Nga mice for 63 d showed a significant decrease in the development of atopic dermatitis-like skin lesions under conventional conditions. The concentration of IgE in the serum collected from mice fed with quince HW was also lowered in a dose-dependent manner. Moreover, we found that quince HW inhibited the release of beta-hexosaminidase from rat basophilic leukemia cell line RBL-2H3 after a 24-h treatment. The quince HW fraction of less than 3 kDa reduced the mRNA expression of the high-affinity IgE receptor (FcepsilonRI) gamma subunit. These results suggest that quince HW had an inhibitory effect on type I allergy by suppressing IgE production and IgE-mediated degranulation.

PMID:
19661701
[Indexed for MEDLINE]
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