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題 名 | Studies on the Antioxidative and Radioprotective Activity of Aqueous Extracts of Graptopetalum paraguayense E. Walther=石蓮花水萃取物抗氧化與輻射保護能力的研究 |
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作 者 | 江振宇; 林昀蓉; 王蓉敏; 陳美慧; 黃敏鳳; 林文傑; 林俊良; 王愛義; | 書刊名 | 中華放射線技術學雜誌 |
卷 期 | 40:3 2016.09[民105.09] |
頁 次 | 頁174-182 |
分類號 | 341.94 |
關鍵詞 | 石蓮花; 抗氧化; 輻射保護; 存活曲線; Graptopetalum paraguayense E. Walther; Antioxidants; Radioprotector; Survival curve; |
語 文 | 英文(English) |
中文摘要 | 本研究在評估石蓮花(Graptopetalum paraguayense E. Walther)水萃物(GW)抗氧化與輻射保護的能力。實驗結果顯示石蓮花水萃物總多酚與總類黃酮分別為215.20±0.65 GAE mg/g和424.29±2.53 RE mg/g。對於DPPH自由基清除,亞鐵離子螯合、ABTS^+自由基清除、脂肪過氧化抑制、超氧自由基清除等50%的抑制濃度(IC_(50))分別為142.6±0.9、226.0±15.6、116.6±0.3、49.8±0.2和39.8±1.0 μg/mL。石蓮花水萃物會增加正常肝細胞(Clone 9)的存活,並隨著水萃物濃度增加成比率增加。在水萃物濃度為200、400和800 μg/mL時,它們的劑量減緩因子(dose reduction factor, DRF)分別為1.41、1.51和1.60。相反的石蓮花水萃物會降低肝腫瘤細胞(HepG2)的存活,並隨著水萃物濃度增加降低存活率。在水萃物濃度為200、400和800 μg/mL時,它們的增敏比(sensitizer enhancement ratio, SER)分別為1.10、1.23和1.37。綜合以上結果,石蓮花水萃物具有極強的抗氧化能力,對正常肝細胞具有保護能力,對肝腫瘤細胞具有增敏作用,它可能對肝癌放射治療上有極大的幫助。 |
英文摘要 | This study was evaluated the antioxidative and radioprotective activity of aqueous extracts of Graptopetalum paraguayense E. Walther (G. paraguayense). The total phenolic and total flavonoid content of aqueous extracts of G paraguayense (GW) were 215.20±0.65 GAE mg/g and 424.29±2.53 RE mg/g, respectively. The half inhibition concentration (IC_(50)) of DPPH radical scavenging, ferrous ion chelating, ABTS^+ radical scavenging, lipid peroxidation inhibition, and superoxide radical scavenging of GW were 142.6±0.9, 226.0±15.6, 116.6±0.3, 49.8±0.2 and 39.8±1.0 μg/mL, respectively. The GW increased the survival of normal liver cells (Clone 9) in a dose-dependent manner, the dose reduction factor (DRF) were 1.41, 1.51, and 1.60, at the concentration of GW was 200, 400, 800 μg/mL, respectively. By contrast, GW reduced the survival of liver carcinoma cells (HepG2) in a dose-dependent manner, the sensitizer enhancement ratio (SER) were 1.10, 1.23, and 1.37, at the concentration of GW was 200, 400, 800 μg/mL, respectively. The results show the GW had strong antioxidative activity, radioprotective ability for normal liver cells and sensitizing effect for liver cancer cell, it might be offer a great help for liver cancer radiotherapy. |
本系統中英文摘要資訊取自各篇刊載內容。