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|標題:||High Dose Vitamin C Supplementation Increases the Th1/Th2 Cytokine Secretion Ratio, but Decreases Eosinophilic Infiltration in Bronchoalveolar Lavage Fluid of Ovalbumin-Sensitized and Challenged Mice||作者:||Chang, H.H.
|關鍵字:||High dose vitamin C supplementation;eosinophilic Infiltration;Th1/Th2;cytokines;bronchoalveolar lavage fluid;ovalbumin-sensitized and;challenged mouse model;dietary antioxidants;airway inflammation;ascorbic-acid;in-vivo;asthma;expression;children||Project:||Journal of Agricultural and Food Chemistry||期刊/報告no：:||Journal of Agricultural and Food Chemistry, Volume 57, Issue 21, Page(s) 10471-10476.||摘要:||
Vitamin C is traditionally regarded to be beneficial for asthma, however the benefit is still controversial. In the present study, high dose vitamin C was supplemented to ovalbumin (OVA)sensitized and challenged mice to evaluate the effects of dietary vitamin C on allergic asthma. In this study, the experimental mice were divided into four groups, including nonsensitized control, dietary control, positive control (cured ip with dexamethasone), and high dose vitamin C supplementation (130 mg of vitamin C/kg bw/day by gavage for 5 weeks). Differential leukocyte counts, levels of inflammatory mediators, as well as type 1 T-helper lymphocytes (Th1)-type and type 2 T-helper lymphocytes (Th2)-type cytokines in the bronchoalveolar lavage fluid (BALF) were determined. The results showed that both high dose vitamin C supplementation and dexamethasone treatments significantly (P < 0.05) decreased eosinophilic infiltration into BALF. High dose vitamin C supplementation significantly increased the secretion ratio of interferon (IFN)-gamma/interleukin (IL)-5 cytokines. This study suggests that high dose vitamin C supplementation might attenuate allergic inflammation in vivo via modulating the Th1/Th2 balance toward the Th1 pole during the Th2-skewed allergic airway inflammation and decreasing eosinophilic infiltration into BALF.
|Appears in Collections:||食品暨應用生物科技學系|
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