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http://dx.doi.org/10.5352/JLS.2010.20.10.1519

Studies on the Anticancer Effect of Apigenin in KB Cell Xenograft Nude Mouse Model  

Lee, Jin-Seok (Department of Companion and Laboratory Animal Science, Kongju National University)
Seo, Hyeong-Seok (Department of Companion and Laboratory Animal Science, Kongju National University)
Kim, So-Jung (Department of Companion and Laboratory Animal Science, Kongju National University)
Kim, Hyeong-Jin (Department of Companion and Laboratory Animal Science, Kongju National University)
Kim, Jin (Department of Companion and Laboratory Animal Science, Kongju National University)
Lee, Seung-Ho (Department of Companion and Laboratory Animal Science, Kongju National University)
Park, Young-Seok (Department of Companion and Laboratory Animal Science, Kongju National University)
Park, Byung-Kwon (Department of Companion and Laboratory Animal Science, Kongju National University)
Kim, Byeong-Soo (Department of Companion and Laboratory Animal Science, Kongju National University)
Kim, Sang-Ki (Department of Companion and Laboratory Animal Science, Kongju National University)
Jung, Ji-Youn (Department of Companion and Laboratory Animal Science, Kongju National University)
Publication Information
Journal of Life Science / v.20, no.10, 2010 , pp. 1519-1524 More about this Journal
Abstract
Apigenin (4', 5, 7-trihydroxyflavone), a common dietary flavonoid abundantly present in fruits and vegetables, has shown remarkable anti-proliferative effects against various malignant cell lines. To observe the anti-proliferative effects, oral cavity cancer cell lines, $6{\times}10^3$ cells/well (96 well plate) of KB oral cavity tumor cells were plated and 24 hr later treated with apigenin for one day, after which MTT assay was performed. Apigenin induced cell death in a dose-dependent manner after incubation. Cell viability was significantly decreased in the group treated with 100 ${\mu}M$ apigenin for 24 hr (p<0.05) compared to the control group. To assess apoptosis, the nuclei of KB cells were stained with DAPI. The presence of chromatin condensation in the apigenin treated cells was detected on a fluorescent microscope (${\times}200$). We investigated the in vivo growth inhibitory effects of apigenin on oral cavity cancer KB tumor xenograft subcutaneously implanted in male nude mice. Apigenin was administered to mice by gavage at doses of 25 and 50 mg/kg/day in 0.2ml of PBS. Tumor volume was significantly decreased in 25 and 50 mg/kg apigenin-administration groups compared to the control group. For apoptosis analysis, TUNEL staining was performed. A significant increase in TUNEL positive cells was found in the 25 mg/kg apigenin administration group compared to the non- apigenin administration group. Histopathological changes were not observed. These results indicate that apigenin inhibits oral cavity cancer cell growth through the induction of apoptosis.
Keywords
Apigenin; oral cavity tumor cells; flavonoids; apoptosis;
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