迷迭香酸对黄嘌呤氧化酶的抑制作用  被引量:41

Inhibition of xathine oxidase by rosmarinic acid

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作  者:尚雁君[1] 黄才国[1] 蒋三好[2] 朱大元[2] 魏善建[1] 焦炳华[1] 

机构地区:[1]第二军医大学基础医学部生物化学和分子生物学教研室,上海200433 [2]中国科学院上海药物研究所,上海201203

出  处:《第二军医大学学报》2006年第2期189-191,共3页Academic Journal of Second Military Medical University

基  金:国家自然科学基金(29632050)~~

摘  要:目的:研究迷迭香酸对黄嘌呤氧化酶的抑制作用。方法:将20、40、60μg/ml迷迭香酸或1μg/ml阳性对照别嘌呤醇,分别加入黄嘌呤溶液(测尿酸生成量:1 mmol/L;测超氧离子:50μmol/L)和0.1 U/ml黄嘌呤氧化酶中,用生化仪测定5min尿酸生成量和超氧离子生成(NBT显色法)。在1 ml 2×105/ml HL-60细胞悬液中加入100μl 6 mol/L黄嘌呤、100μl0.1 U/ml黄嘌呤氧化酶、500μg/ml迷迭香酸,分别以AnnexinⅤ-PI双标试剂盒法(以1μg/ml别嘌呤醇为阳性对照)或细胞周期法(以100 U/ml SOD为阳性对照)测定细胞凋亡率。结果:迷迭香酸显著抑制尿酸生成和超氧离子引起的NBT显色,两种方法测得其IC50分别为56μg/ml和21μg/ml;对细胞凋亡的抑制率均在40%以上。结论:迷迭香酸是黄嘌呤氧化酶的竞争性抑制剂。Objective: To study the inhibitory effect of rosmarinic acid on xanthine oxidase. Methods: Xanthine oxidase (0.1 U/ml) was incubated with xanthine (1 mmol/L for determining formation of uric acid; 50μmol/L for determining superoxide anions) in the presence of 20, 40 and 60μg/ml rosmarinic acid or allopurinol as positive control. The formation of uric acid was determined by automatic biochemical analyzer 5 rain after reaction and the production of superoxide anions was measured by Nitro Blue Btetrazolium (NBT) reduction. HL-60 cells (1 ml, 2×10^5/ml) were pretreated with xanthine (100μl, 6 mol/L) and xanthine oxidase (100μl, 0.1 U/ml), then rosmarinic acid (500μg/ml) or allopurinol (1μg/ml, as positive control) (AnnexinV-PI kit) was added to determine the cell apoptosis rate. HL-60 cells (1 ml, 2 × 10^5/ml) were also pretreated with xanthine (100 μl, 6 mol/L) and xanthine oxidase (100μl, 0.1 U/ml), then rosmarinic acid (500 μg/ml) or SOD (100 U/ ml, as positive control) (cell cycle method) was added to determine the cell apoptosis rate. Results: Rosmarinic acid obviously inhibited the production of uric acid and superoxide anion-induced reaction in NBT assay, with their IC50being 56μg/ml and 21μg/ml, respectively. The rates of apoptosis inhibition by rosmarinic acid were both over 40% by Annexin V-PI kit and cell cycle method. Conclusion: Rosmarinic acid is a competitive inhibitor of xanthine oxidase.

关 键 词:迷迭香酸 黄嘌呤氧化酶 尿酸 超氧离子 细胞凋亡 抑制作用 

分 类 号:R285.5[医药卫生—中药学]

 

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