Effects of Propolis on Peripheral White Cells, Antioxidative Activity and Tumor Growth in Irradiated

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The effect of continuous water-soluble propolis administration on radioactivity-induced reduction of hemocytes, and the antioxidant and antitumor effects were investigated. Following a 1-week adjustment period, water-soluble propolis was administered intraperitoneally to male ICR mice at a dose of 100mg/kg every other day for 2 weeks. Following administration, 2 Gy whole-body irradiation was performed and the counts of leukocytes, lymphocytes, and granulocytes and monocytes in the peripheral blood were determined 1, 3, 7, 15 and 30 days after irradiation. In the second experiment, water-soluble propolis was similarly administered to the mice for 2 weeks after a 1-week adjustment period, and 2 Gy whole-body irradiation was performed. The antioxidant effects in hemocytes were then investigated using 2,2-azobis(2-amidinopropane) dihydrochloride (AAPH), a radical generator. In the third experiment, 1×l06 Sarcoma-180 cells were inoculated into the right thigh of mice, which were divided into four groups: control, water-soluble propolis-treated, 6 Gy irradiated and water-soluble propolis-treated + 6 Gy irradiated groups, and changes in tumor size were measured for 20 days. Results show that administration of water-soluble propolis inhibits the reduction of hemocytes caused by whole-body irradiation, enhances antioxidant effects against radioactivity, and inhibits tumor growth.
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