Spectrometric investigation of DPPH and ABTS free radical-scavenging of Ulva lacyuca L. aqueous extracts
ZHONG Yu, CHEN Tian-feng, ZHENG Wen-jie, YANG Yu-feng*
1. Department of Hydrobiology, Jinan University, Guangzhou 510632, China; 2. Department of Chemistry, Jinan University, Guangzhou 510632, China; 3. Key Laboratory of Aquatic Eutrophication and Control of Harmful Algal Blooms of Guangdong Higher Education Institutes, Guangzhou 510632, China
The antioxidant activities of Ulva lacyuca L. aqueous extracts against DPPH and ABTS free radicals were evaluated using spectrometric methods. The results showed that the detection wavelength and stable time for ABTS system were 734 nm and 6 min respectively, while those for DPPH system were 515 nm and 30 min, respectively. The extracts effectively and rapidly removed ABTS and DPPH free radicals, and showed a dose- and time-dependent manner, indicating the potent antioxidant activities under both hydrophilic and hydrophobic conditions. Under the optimized systems, the IC50 values for Se-PPC, PPC and VC against ABTS free radical were 76.40, 54.11 and 60.69 μg/ml, respectively. Se-PPC exhibited significantly higher activities than the VC. For DPPH free radicals, the IC50 values of Se-PPC, PPC and VC were 123.29, 76.83 and 24.79 μg/ml, respectively. Our results suggest selenium-enrichment cultured U. lacyuca L. has potential value of applications to be functional food with antioxidation.
[1] Pilon-Smits, E A H, LeDuc, D L., Phytoremediation of selenium using transgenic plants[J]. Current Opinion in Biotechnology, 2009, 20(2): 207-212.
[2] Zhu, Y G, Pilon-Smits, E A H, Zhao, F-J, Williams, P N, Meharg, A A, Selenium in higher plants: understanding mechanisms for biofortification and phytoremediation[J]. Trends in Plant Science, 2009, 14(8): 436-442.
[3] Zhang L, Ackley A R, Pilon-Smits E A H. Variation in selenium tolerance and accumulation among 19 Arabidopsis thaliana accessions[J]. J. Plant Physiol, 2007,164, 327-336.
[4] Chasteen T G, Bentley R. Biomethylation of selenium and tellurium: microorganisms and plants[J]. Chem. Rev, 2003, 103, 1-26.
[5] Burk R F. Selenium, an antioxidant nutrient[J]. Nutr Clin Care, 2002, 5: 75-79.
[6] Imam S Z, Ali S F. Selenium, an antioxidant, attenuates Methamphetamine-induced dopaminergic toxicity and peroxynitrite generation[J]. Brain Res, 2000, 855(1): 186-91.
[7] Kuda T, Tsunekawa M, Hishi T, Araki Y. Antioxidant properties of dried kayamo-nori, a brown alga Scytosiphon lomentaria(Scytosiphonales, Phaeophyceae)[J]. Food Chem, 2005, 89, 617-622.
[8] Zhang, Q, Yu, P, Li, Z, Zhang, H, Xu, Z, Li, P. Antioxidant activities of sulfated polysaccharide fractions from Porphyra haitanesis[J]. J. Appl. Phycol, 2003, 15, 305-310.
[9] Sodhi S, Sharma A, Brar A P S. Effect of α tocopherol and selenium on antioxidant status, lipid peroxidation and hepatopathy induced by malathion in chicks[J]. Pestic Biochem Phys, 2008, 90: 82-86
[10] 杨宇峰, 赵细康. 海水养殖绿色生产与管理[M]. 海洋出版社, 2007. 13-16.
[11] Kajal Chakraborty. Sesquiterpenoids with free-radical-scavenging properties from marine macroalga Ulva fasciata Delile[J]. Food Chemistry, 2010, 122: 31-41.
[12] Luca Avellini, Elisabetta Chiaradia, Alberto Gaiti. Effect of exercise training, selenium and vitamin E on some free radical scavengers in horses(Equus caballus)[J]. Comparative Biochemistry and Physiology, 1999, 123-2: 147-154.
[13] Chen Tianfeng, Huang Yingchen. Antioxidant and Anticancer Activities of Selenium-containing Phycocanin Purified from Spirulina Platensis[J].Academic Periodical of Farm Products Processing, 2006, 08.
[14] Hemler M E, Cook H W, Lands W E. Prostaglandin biosynthesis can be triggered by lipid peroxides[J]. Arch Biochem Biophys, 1979, 193: 340-345.
[15] 郑文杰, 欧阳政. 植物有机硒的化学及医学应用[M]. 暨南大学出版社, 2001. 33-35.
[16] Chen Tianfeng, Zheng Wenjie, Yang Fang, Bai Yan, Yum-Shing Wong. Accumulation of selenium in mixotrophic culture of Spirulina platensis on glucose[J]. Bioresource Technology. 2006, 97, 2260-2265.
[17] Chen Tianfeng, Wong Yum-Shing. In vitro antioxidant and antiproliferative activities of selenium-containing phycocyanin from selenium-enriched Spirulina platensis[J]. Journal of Agricultural and Food Chemistry. 2008, 56, 4352-4358.
[18] Chen Tianfeng, Wenjie Zheng, Fang Yang, Yan Bai, Wong Yum-Shing. Mixotrophic culture of high selenium-enriched Spirulina platensis on acetate and the enhanced production of photosynthetic pigments[J]. Enzyme and Microbial Technology. 2006, 39, 103-107.
[19] Chen TianFeng, Zheng Weniie, Wong Yum-Shing. Selenium-induced changes in activities of antioxidant enzymes and content of photosynthetic pigments in Spirulina platensis[J]. Journal of Integrative Plant Biology. 2008, 50, 40-48.
[20] 张逸波, 郑文杰, 黄峙, 杨芳, 刘杰, 陈填烽.硒杂环化合物SPO清除DPPH和ABTS自由基的光谱学研究[J]. 光谱学与光谱分析, 2010, 30, 1866-1871.
[21] 郑善元, 陈填烽, 郑文杰, 黄荫成. 单丛茶水提物清除DPPH和ABTS自由基的光谱学研究[J]. 光谱学与光谱分析, 2010, 30, 2417-2423.
[22] Fleurence, J. Seaweed proteins: biochemical, nutritional aspects and potential uses[J]. Trends in Food Science and Technology, 1999, 10, 25-28.
[23] Mazid, M., Khan, T.A., Mohammad, F.. Role of secondary metabolites in defense mechanisms of plants[J]. Biology and Medicine, 2011, 3 (2), 232-249.