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Cytotechnology. 2011 Mar;63(2):143-52. doi: 10.1007/s10616-010-9323-8. Epub 2011 Jan 26.

Inhibitory effect of hot-water extract of quince (Cydonia oblonga) on immunoglobulin E-dependent late-phase immune reactions of mast cells.

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1
Laboratory of Food Bioscience, Faculty of Agriculture, Shinshu University, 8304, Minamiminowa, Kamiina, Nagano, 399-4598, Japan, tkawafb@shinshu-u.ac.jp.

Abstract

We evaluated the effect of a crude hot-water extract (HW) of quince (Cydonia oblonga Miller) fruit on immunoglobulin E (IgE)-dependent late-phase immune reactions of mast cells using in vitro system. Mast cell-like RBL-2H3 cells were treated with quince HW and late-phase reaction was then induced by stimulation with IgE + Antigen. Quince HW reduced the elevation of interleukin-13 and tumor necrosis factor-α expression level. Furthermore, quince HW suppressed these cytokine expressions of mouse bone marrow-derived mast cells (BMMCs), a normal mast cell model. Leukotriene C(4) and prostaglandin D(2) production in BMMCs after 1 and 6 h of stimulation, respectively, were also reduced by treating the cells with quince HW. We found that the induction of intracellular cyclooxygenase (COX)-2 expression but not COX-1 expression in BMMCs was reduced by quince HW. These results suggest that quince HW has an inhibitory effect on broad range of the late-phase immune reactions of mast cells.

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