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- W2065118045 abstract "The polysaccharide fractions were isolated and purified from Phellodendron chinese SCHNEID, and antitumor activities were examined at dosages of 2, 5 and 10 mg/100 g. F-7 and F-8 showed the highest tumor inhibitory activities (inhibition ratio 96.4 and 98.2% in 2 mg/100 g), and in dose of 5 mg/100 g, the inhibitory ratios were 95.3 and 97.5%, respectively. Furthermore, 10 mg/100 g of intraperitoneal (i.p.) injection gave 97.3 and 98.7% of inhibition. In oral administration, the inhibitory activities were not markedly observed, indicating that the polysaccharides are directly acting to immune system. Also the polysaccharides increased the number of circulating blood leukocytes and total peritoneal exudate cells. Although implantation of tumor cells greatly decreased the productivity of antibody (antibody-mediated) and T lymphocyte reactivity (delayed-type) as 6.3 from 9.3 and 5.9 from 7.7, represented by the increase of footpad thickness, respectively. The polysaccharides elevated the reactivity of T lymphocyte in tumor-bearing mice, which were rapidly recovered by discontinuance of sample treatments. Especially, F-2, F-5, F-7 and F-8 remarkably recovered the decreased sensitivity. When the effects on thymidylate synthase (TS) and thymidine kinase (TK) activities were determined, TS activities in the F-2 and F-7-treated mice were markedly suppressed to 73.7% and 79.5% of that in the control (p < 0.01), while there was little difference in TK activity with a slight decrease in F-2 only. However, in i.p. injection, TS activities in the F-2, F-5, F-7 and F-8-treated mice were markedly suppressed to 83% to 85% of that in the control (p < 0.01). Furthermore, there were also significant differences in TK activities in F-2, F-5, F-7 and F-8-treated mice (p < 0.05). These results clearly indicated that the i.p. injection is much effective to suppress tumor growth than oral administration." @default.
- W2065118045 created "2016-06-24" @default.
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- W2065118045 date "2004-10-01" @default.
- W2065118045 modified "2023-10-16" @default.
- W2065118045 title "Immunopontentiating and antitumor activities of the purified polysaccharides from Phellodendron chinese SCHNEID" @default.
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- W2065118045 doi "https://doi.org/10.1016/j.lfs.2004.03.036" @default.
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