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作 者:薛平[1] 汤彬[1] 陈建伟[1] 王玉[1] 姚晓[1] 李祥[1]
机构地区:[1]南京中医药大学,南京210046
出 处:《中国实验方剂学杂志》2013年第4期246-249,共4页Chinese Journal of Experimental Traditional Medical Formulae
基 金:江苏高校优势学科建设工程资助项目(ysxk-2010);紫衫中医功效基础研究(2011YX6-008)
摘 要:目的:考察南方红豆杉枝叶不同提取部位体外抑制α-葡萄糖苷活性和抗氧化活性。方法:对南方红豆杉的醇提液、石油醚部位、乙酸乙酯部位、正丁醇部位、水部位采用体外α-葡萄糖苷酶抑制模型进行酶抑制活性研究,并通过其清除1,1二苯基苦基苯肼(DPPH)自由基和Fe3±还原能力(FRAP)测定南方红豆杉提取物的体外抗氧化作用。结果:南方红豆杉提取物均有不同程度抑制α-葡萄糖苷酶活性,以乙酸乙酯部位效果最佳(IC5027.854 1 mg.L-1),其次醇提物(IC5029.215 5 mg.L-1)和正丁醇部位(IC5038.913 0 mg.L-1),水部位(IC5074.505 9 mg.L-1)石油醚部位(IC50128.729 5 mg.L-1)最弱。抗氧化活性依次为醇提液(DPPH IC506.370 7 mg.L-1,FRAP 4.266 mmol.g-1)>乙酸乙酯部位(DPPH IC509.535 8 mg.L-1,FRAP3.275 mmol.g-1)>正丁醇部位(DPPH IC5020.461 3 mg.L-1,FRAP 1.498 mmol.g-1)>水部位(DPPH IC5026.685 5 mg.L-1,FRAP 0.678 mmol.g-1)>石油醚部位。结论:初步确定南方红豆杉抑制α-葡萄糖苷酶活性有效成分主要在乙酸乙酯与正丁醇部位,抗氧化及其相关成分主要在乙酸乙酯部位。Objective: Inhibition of alpha-glucosidase and antioxidation of different extracts from the branches and leaves of Taxus chinensis vat mairei were studied in vitro to supply the separating base of the effective chemical components. Method: The inhibitory activities of c^-glucoside were assayed in external. The antioxidant activities of these extracts were assessed bytwo complementary test systems, namely 1, 1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity and ferric reducing antioxidant power (FRAP) assay. Result: The ethyl acetate extract showed strong activity in the inhibitory activities of α-glucoside. (IC50 27. 854 1 mg L-1 ) The ethanol extract ( IC50 29. 215 5 mg -L-1 ) and n-butanol extract ( IC50 38. 913 0 mg -L-1 ) displayed lower activity. Petroleum ether fraction (IC5o 128. 729 5 mg L-1 ) and water fraction (IC5o 74. 505 9 mg L-1 ) have a little activity. The antioxidant activities : ethanol extract ( DPPH IC5o 6. 370 7 mg .L-I, FRAP 4. 266 mmol .g-I ) 〉 ethyl acetate extract (DPPH ICso 9. 535 8 mg "L-I, FRAP 3. 275 mmol "g-I ) 〉 n-butanol extract ( DPPH ICs0 1 20. 4613 mg.L-1, FRAP 1.498 mmol.g-1 ) 〉water fraction (DPPH ICs0 26. 685 5 mg L-l, FRAP 0.678 mmol .g-1) 〉 petroleum ether fraction. Conclusion: The components of inhibition α-glucoside could be testified in the ethyl acetate extract and n-butanol extract. Antioxidative components were in the ethyl acetate extract.
关 键 词:南方红豆杉 枝叶 抑制α-葡萄糖苷酶活性 抗氧化
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