:::Combining fisetin and ionizing radiation suppresses the growth of mammalian colorectal cancers in xenograft tumor models.
Combining fisetin and ionizing radiation suppresses the growth of mammalian colorectal cancers in xenograft tumor models. 員工報告
| 資料項目 | 檔案大小 | 檔案格式 | 更新時間 | 操作 |
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| 計畫摘要 | Fisetin (3,7,3′,4′-tetrahydroxyflavone), which belongs to the flavonoid group of polyphenols and is found in a wide range of plants, has been reported to exhibit a number of biological activities in human cancer cells, including antioxidant, anti-inflammatory, antiangiogenic, anti-invasive and antiproliferative effects. Although previous in vitro studies have shown that fisetin treatment increases the apoptotic rate and enhances the radiosensitivity of human colorectal cancer cells, the in vivo effects of fisetin on tumor growth remain unclear. In the present study a murine xenograft tumor model was employed to investigate the therapeutic effects of fisetin in combination with radiation on CT-26 colon cancer cells and human HCT116 colorectal cancer cells. This revealed that intratumoral injection of fisetin significantly suppressed the growth of CT-26 tumors compared with the untreated control group, but had little effect on the growth of HCT116 tumors. However, fisetin in combination with 2-Gy radiation enhanced tumor suppressor activity in murine colon and human colorectal xenograft tumors, as compared with 2-Gy fractionated radiation administered alone for 5 days and fisetin alone. Interestingly, fisetin downregulated the expression of the oncoprotein securin in a p53-independent manner. However, securin-null HCT116 tumors showed only moderate sensitivity to fisetin treatment, and the combination of fisetin and radiation did not significantly suppress securin-null HCT116 tumor growth compared with normal HCT116 tumors. Therefore, the role of securin in mediating the effect of fisetin on colorectal cancer growth warrants further investigation. In conclusion, the results of the current study provide important preclinical data for evaluating the efficacy of fisetin and radiation combination treatment as an adjuvant chemoradiotherapy for human colorectal cancers. |
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| 資料集研究(主辦)機關 | 衛生局聯合醫院 |
| 年度 | 105 |
| 研究人員 | Leu JD(呂志得), Wang BS, Chiu SJ, Chang CY, Chen CC, Chen FD, Avirmed S, Lee YJ. |
| 關鍵詞 | 期刊 |
| 備註 | 本專區110年以前為歷史轉檔資料，因新舊平臺欄位規格不同，故有部分詮釋資料欄位無資訊；如對資料內容有疑義，請洽資料集主辦機關或本府研考會研究發展組。 |