Irradiation has been widely used as therapeutic methods of various disease. Irradiation may inhibit the growth of cancer cells, but may damage normal cells, thereby induce the inflammation. quercetin is a member of an extensive class polyphenolic flav...
Irradiation has been widely used as therapeutic methods of various disease. Irradiation may inhibit the growth of cancer cells, but may damage normal cells, thereby induce the inflammation. quercetin is a member of an extensive class polyphenolic flavonoid compounds that is widely distributed mainly as glycosides in components of the daily diet such as onions, apples, berries, tea and red wine. Quercetin is a flavones that has been shown to possess entire accidence competence and may also reduce inflammatory molecules. In this study, we evaluated the chemopreventive efficacy of quercetin on Modulation of Immunocompetence and Nutritional status which are used as biomarkers in irradiation-induced inflammation. In vitro experiment, the mice splenocyte proliferation was examined by MTT assay. The splenocytes proliferation was increased when quercetin were supplemented in all concentrations investigated(10, 25, 50, 150, 200, 300, 600, 1000μM). Ex vivo experiment, two kinds of concentrations (10, 40 mg/kg b.w) of quercetin in distilled water were orally administrated every other day from 2 weeks before to 30days after irradiation. And treated with and without the irradiation dose 15 Gy treatment. The animals were killed at 10days, 30days following irradiation.
Splenocyte proliferation of quercetin with stimulation such as Con A and LPS was enhanced at concentration 10 or 40mg/kg b.w. supplementation compared to that of control group with irradiation treatment. The percent of CD4+ and CD8+ were not significantly different in between different concentration and treated with or without irradiation. The production capacity of cytokines (TNF-a, IL-6, IL-10) by mice irradiation-induced inflammation were used as indices for immune activity. The production of cytokines (IL-1β, TNF-a, IL-6) of irradiation treatment group was increased compared to those of without irradiation treatment, After 30days, IL-1β, IL-6 production were significantly decreased in quercetin 10, 40 mg/kg b.w with irradiation groups. The total protein, albumin of irradiation groups were significantly lower than those of without irradiation groups. After 30days, Serum triglyceride, cholesterol were significantly decreased in quercetin 10, 40 mg/kg b.w with irradiation groups. Concentrations of TBARs of irradiation groups were significantly higher than those of without irradiation groups. Although irradiation itself may cause the suppression of immune activity. The oral supplementation of quercetin showed possible protective effect against irradiation-induced inflammation in mice.
In conclusion, this study suggests that quercetin could be beneficially used to recover the irradiation-induced decrement of cytokine production and nutritional status.