Interrelation of cholesterol-lowering, antioxidant activity and DNA damage protection to the different solvent extracts of mulberry (Morus alba L.)
Jing Liu
State Key Laboratory of Silkworm Genome Biology, College of Biotechnology, Southwest University, Chongqing, China
Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, College of Biotechnology, Southwest University, Chongqing, China
Search for more papers by this authorYan Yu
State Key Laboratory of Silkworm Genome Biology, College of Biotechnology, Southwest University, Chongqing, China
Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, College of Biotechnology, Southwest University, Chongqing, China
Search for more papers by this authorYiping Zhao
State Key Laboratory of Silkworm Genome Biology, College of Biotechnology, Southwest University, Chongqing, China
Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, College of Biotechnology, Southwest University, Chongqing, China
Search for more papers by this authorLiangyu Jiang
State Key Laboratory of Silkworm Genome Biology, College of Biotechnology, Southwest University, Chongqing, China
Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, College of Biotechnology, Southwest University, Chongqing, China
Search for more papers by this authorYou Zhou
State Key Laboratory of Silkworm Genome Biology, College of Biotechnology, Southwest University, Chongqing, China
Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, College of Biotechnology, Southwest University, Chongqing, China
Search for more papers by this authorCorresponding Author
Dejian Huang
Food Science and Technology Programme, Department of Chemistry, National University of Singapore, Singapore, Singapore
Correspondence
Dejian Huang, Food Science and Technology Programme, Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore.
Email: [email protected]
Li Xu, State Key Laboratory of Silkworm Genome Biology, Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, College of Biotechnology, Southwest University, Chongqing 400716, China.
Email: [email protected].
Search for more papers by this authorCorresponding Author
Li Xu
State Key Laboratory of Silkworm Genome Biology, College of Biotechnology, Southwest University, Chongqing, China
Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, College of Biotechnology, Southwest University, Chongqing, China
Correspondence
Dejian Huang, Food Science and Technology Programme, Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore.
Email: [email protected]
Li Xu, State Key Laboratory of Silkworm Genome Biology, Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, College of Biotechnology, Southwest University, Chongqing 400716, China.
Email: [email protected].
Search for more papers by this authorJing Liu
State Key Laboratory of Silkworm Genome Biology, College of Biotechnology, Southwest University, Chongqing, China
Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, College of Biotechnology, Southwest University, Chongqing, China
Search for more papers by this authorYan Yu
State Key Laboratory of Silkworm Genome Biology, College of Biotechnology, Southwest University, Chongqing, China
Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, College of Biotechnology, Southwest University, Chongqing, China
Search for more papers by this authorYiping Zhao
State Key Laboratory of Silkworm Genome Biology, College of Biotechnology, Southwest University, Chongqing, China
Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, College of Biotechnology, Southwest University, Chongqing, China
Search for more papers by this authorLiangyu Jiang
State Key Laboratory of Silkworm Genome Biology, College of Biotechnology, Southwest University, Chongqing, China
Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, College of Biotechnology, Southwest University, Chongqing, China
Search for more papers by this authorYou Zhou
State Key Laboratory of Silkworm Genome Biology, College of Biotechnology, Southwest University, Chongqing, China
Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, College of Biotechnology, Southwest University, Chongqing, China
Search for more papers by this authorCorresponding Author
Dejian Huang
Food Science and Technology Programme, Department of Chemistry, National University of Singapore, Singapore, Singapore
Correspondence
Dejian Huang, Food Science and Technology Programme, Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore.
Email: [email protected]
Li Xu, State Key Laboratory of Silkworm Genome Biology, Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, College of Biotechnology, Southwest University, Chongqing 400716, China.
Email: [email protected].
Search for more papers by this authorCorresponding Author
Li Xu
State Key Laboratory of Silkworm Genome Biology, College of Biotechnology, Southwest University, Chongqing, China
Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, College of Biotechnology, Southwest University, Chongqing, China
Correspondence
Dejian Huang, Food Science and Technology Programme, Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore.
Email: [email protected]
Li Xu, State Key Laboratory of Silkworm Genome Biology, Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, College of Biotechnology, Southwest University, Chongqing 400716, China.
Email: [email protected].
Search for more papers by this authorAbstract
Relationships among the cholesterol-lowering, antioxidant, and DNA damage protection activity of four solvent extracts from the Morus alba L. (Cultivar Hongguo 2) fruits, leaves, and twigs were investigated. The petroleum ether extract of fruit (FPE) had the highest amount of total flavonoids, cholesterol-lowering activity, and better DPPH radical scavenging capacity. The ethyl acetate extract of fruit (FEE) had the highest antioxidant activity. The petroleum ether extract of the leaf (LPE), fruit (FPE), and ethyl acetate extract of twig (TEE) had strong inhibiting lipid oxidation activity (ILOA) and DNA damage protection potential, accompanied with high total phenols and flavonoids content. It suggested that polyphenol contents, flavonoid contents, or both to Hongguo 2 were positively correlated with the three biological activities, moreover, the low polarity extracts of the high ILOA could improve the cholesterol-lowering activity or DNA damage protection potential through the synergism among different polyphenolic and flavonoids compounds.
Practical applications
All the results indicate that the medium and low polarity substances of Hongguo 2 are good sources of natural anti-hypercholesterolemia, antioxidants, and DNA damage protection deserved further investigation and process to functional food. The petroleum ether extract of the fruit (FPE) had both high cholesterol-lowering and DNA damage protection activity that could serve as potential Chinese patent medicine in a trial to alleviate the adverse effects of hypercholesterolemic individuals. The petroleum ether extract of the leaf, fruit, and ethyl acetate extract of twig with strong DNA damage protection potential and rich phenols and flavonoids could be a functional food to prevent genetic damage. The fruit ethyl acetate extract with high antioxidant activity could be a natural anti-aging ingredient to apply to antioxidation health products.
CONFLICT OF INTEREST
The authors have declared no conflicts of interest for this article.
Supporting Information
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jfpp14891-sup-0001-FigS1.tifTIFF image, 4.5 MB | Fig S1 |
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REFERENCES
- Amarowicz, R. (2014). Antioxidant activity of peppers. European Journal of Lipid Science and Technology, 116, 237–239. https://doi.org/10.1002/ejlt.201400036
- Arabshahi Delouee, S., & Urooj, A. (2007). Antioxidant properties of various solvent extracts of mulberry (Morus indica L.) leaves. Food Chemistry, 102, 1233–1240. https://doi.org/10.1016/j.foodchem.2006.07.013
- Bae, S. H., & Suh, H. J. (2007). Antioxidant activities of five different mulberry cultivars in Korea. LWT - Food Science and Technology, 40, 955–962. https://doi.org/10.1016/j.lwt.2006.06.007
- Borochov Neori, H., Judeinstein, S., Greenberg, A., Volkova, N., Rosenblat, M., & Aviram, M. (2015). Antioxidant and antiatherogenic properties of phenolic acid and flavonol fractions of fruits of “Amari” and “Hallawi” date (Phoenix dactylifera L.) varieties. Journal of Agricultural and Food Chemistry, 63, 3189–3195. https://doi.org/10.1021/jf506094r
- Botterweck, A., Verhagen, H., Goldbohm, R., Kleinjans, J., & Van den Brandt, P. (2000). Intake of butylated hydroxyanisole and butylated hydroxytoluene and stomach cancer risk: Results from analyses in the Netherlands cohort study. Food and Chemical Toxicology, 38, 599–605. https://doi.org/10.1016/S0278-6915(00)00042-9
- Boubaker, J., Skandrani, I., Bouhlel, I., sghaier, M. B., Neffati, A., Ghedira, K., & Chekir-Ghedira, L. (2010). Mutagenic, antimutagenic and antioxidant potency of leaf extracts from Nitraria retusa. Food and Chemical Toxicology, 48, 2283–2290. https://doi.org/10.1016/j.fct.2010.05.061
- Butt, M. S., Nazir, A., Sultan, M. T., & Schroën, K. (2008). Morus alba L. nature's functional tonic. Trends in Food Science & Technology, 19, 505–512. https://doi.org/10.1016/j.tifs.2008.06.002
- Chan, K. C., Yang, M. Y., Lin, M. C., Lee, Y. J., Chang, W. C., & Wang, C. J. (2013). Mulberry leaf extract inhibits the development of atherosclerosis in cholesterol-fed rabbits and in cultured aortic vascular smooth muscle cells. Journal of Agricultural and Food Chemistry, 61, 2780–2788. https://doi.org/10.1021/jf305328d
- Chang, J. J., Hsu, M. J., Huang, H. P., Chung, D. J., Chang, Y. C., & Wang, C. J. (2013). Mulberry anthocyanins inhibit oleic acid induced lipid accumulation by reduction of lipogenesis and promotion of hepatic lipid clearance. Journal of Agricultural and Food Chemistry, 61, 6069–6076. https://doi.org/10.1021/jf401171k
- Chang, L. W., Juang, L. J., Wang, B. S., Wang, M. Y., Tai, H. M., Hung, W. J., … Huang, M. H. (2011). Antioxidant and antityrosinase activity of mulberry (Morus alba L.) twigs and root bark. Food and Chemical Toxicology, 49, 90–785. https://doi.org/10.1016/j.fct.2010.11.045
- Chen, C., You, L. J., Abbasi, A. M., Fu, X., & Liu, R. H. (2015). Optimization for ultrasound extraction of polysaccharides from mulberry fruits with antioxidant and hyperglycemic activity in vitro. Carbohydrate Polymers, 130, 122–132. https://doi.org/10.1016/j.carbpol.2015.05.003
- Chen, C. C., Liu, L. K., Hsu, J. D., Huang, H. P., Yang, M. Y., & Wang, C. J. (2005). Mulberry extract inhibits the development of atherosclerosis in cholesterol-fed rabbits. Food Chemistry, 91, 601–607. https://doi.org/10.1016/j.foodchem.2004.06.039
- Clarke, G., Ting, K., Wiart, C., & Fry, J. (2013). High correlation of 2,2-diphenyl-1-picrylhydrazyl (DPPH) Radical scavenging, ferric reducing activity potential and total phenolics content indicates redundancy in use of all three assays to screen for antioxidant activity of extracts of plants from the Ma. Antioxidants, 2, 1–10. https://doi.org/10.3390/antiox2010001
- Duarte, M. M. M. F., Rocha, J. B. T., Moresco, R. N., Duarte, T., Da Cruz, I. B. M., Loro, V. L., & Schetinger, M. R. C. (2009). Association between ischemia-modified albumin, lipids and inflammation biomarkers in patients with hypercholesterolemia. Clinical Biochemistry, 42, 666–671. https://doi.org/10.1016/j.clinbiochem.2009.01.010
- El Beshbishy, H. A., Singab, A. N. B., Sinkkonen, J., & Pihlaja, K. (2006). Hypolipidemic and antioxidant effects of Morus alba L. (Egyptian mulberry) root bark fractions supplementation in cholesterol-fed rats. Life Sciences, 78, 2724–2733. https://doi.org/10.1016/j.lfs.2005.10.010
- Escobedo Avellaneda, Z., Gutiérrez Uribe, J., Valdez Fragoso, A., Torres, J. A., & Welti Chanes, J. (2013). Phytochemicals and antioxidant activity of juice, flayed, albedo and comminuted orange. Journal of Functional Foods, 6, 470–481. https://doi.org/10.1016/j.jff.2013.11.013
- Fabiani, E. D., Mitro, N., Gilardi, F., Caruso, D., Galli, G., & Crestani, M. (2003). Coordinated control of cholesterol catabolism to bile acids and of gluconeogenesis via a novel mechanism of transcription regulation linked to the fasted-to-fed cycle. Journal of Biological Chemistry, 278, 39124–39132. https://doi.org/10.1074/jbc.M305079200
- Giada, M., & Mancini Filho, J. (2009). Antioxidant capacity of the striped sunflower (Helianthus annuus L.) seed extracts evaluated by three in vitro methods. International Journal of Food Science and Nutrition, 60, 395–401. https://doi.org/10.1080/09637480701755262
- Gong, L., Zhang, H., Niu, Y., Chen, L., Liu, J., Alaxi, S., … Yu, L. (2015). A novel alkali extractable polysaccharide from Plantago asiatic L. seeds and its radical-scavenging and bile acid-binding activities. Journal of Agricultural and Food Chemistry, 63, 569–577. https://doi.org/10.1021/jf505909k
- Gutteridge, C. J. M. (1984). Reactivity of hydroxyl and hydroxyl-like radicals discriminated by release of thiobarbituric acid-reactive material from deoxy sugars, nucleosides and benzoate. Biochemical Journal, 224, 761–767. https://doi.org/10.1042/bj2240761
- Hanachi, P., & Golkho, S. (2009). Using HPLC to determination the composition and antioxidant activity of Berberis vulgaris. European Journal of Scientific Research, 29, 47–54.
- Huang, H. P., Shih, Y. W., Chang, Y. C., Hung, C. N., & Wang, C. J. (2008). Chemoinhibitory effect of mulberry anthocyanins on melanoma metastasis involved in the Ras/PI3K pathway. Journal of Agricultural and Food Chemistry., 56, 9286–9293. https://doi.org/10.1021/jf8013102
- Isabelle, M., Lee, B. L., Ong, C. N., Liu, X., & Huang, D. (2008). Peroxyl radical scavenging capacity, polyphenolics, and lipophilic antioxidant profiles of mulberry fruits cultivated in southern China. Journal of Agricultural and Food Chemistry, 56, 9410–9416. https://doi.org/10.1021/jf801527a
- Jeong, J. B., Seo, E. W., & Jeong, H. J. (2009a). Effect of extracts from pine needle against oxidative DNA damage and apoptosis induced by hydroxyl radical via antioxidant activity. Food and Chemical Toxicology, 47, 2135–2141. https://doi.org/10.1016/j.fct.2009.05.034
- Jiang, Y., Proteau, P., Poulter, D., & Ferro Novick, S. (1995). BTS1 encodes a geranylgeranyl diphosphate synthase in Saccharomyces cerevisiae. Journal of Biology Chemistry, 270, 21793–21799. https://doi.org/10.1074/jbc.270.37.21793
- Kaur, C., & Kapoor, H. C. (2001). Antioxidants in fruits and vegetables-the millennium’s health. International Journal of Food Science and Technology, 36, 703–725. https://doi.org/10.1111/j.1365-2621.2001.00513.x
- Kimura, T., Nakagawa, K., Kubota, H., Kojima, Y., Goto, Y., Yamagishi, K., … Miyazawa, T. (2007). Food-grade mulberry powder enriched with 1-deoxynojirimycin suppresses the elevation of postprandial blood glucose in humans. Journal of Agricultural and Food Chemistry, 55, 5869–5874. https://doi.org/10.1016/S0031-9422(00)83099-X
- Kowalski, M., Bielecka Kowalska, A., Bielecka Roszkiewicz, K., Dziankowska Zaborszczyk, E., De Graft Johnson, J., Szemraj, J., … Nowak, D. (2009). Ferric reducing ability of tears in healthy subjects-diurnal variation and dependence on defined demographic data. Current Eye Research, 34, 333–339. https://doi.org/10.1080/02713680902815268
- Lamb, D. C. (1997). Characterization of Saccharomyces cerevisiae CYP61, Sterol Delta 22Desaturase, and Inhibition by Azole Antifungal Agents. Journal of Biology Chemistry, 272, 9986–9988. https://doi.org/10.1074/jbc.272.15.9986
- Lang, J. B., & Li, L. L. (2009). Characteristics and planting techniques of new mulberry cultivars Hongguo 2 and baiyuhuang. Ningbo Agricultural Science and Technology, 3, 29–30.
- Li, C., Nie, S. P., Ding, Q., Zhu, K. X., Wang, Z. J., Xiong, T., … Xie, M. Y. (2014). Cholesterol-lowering effect of Lactobacillus plantarum NCU116 in a hyperlipidaemic rat model. Journal of Functional Foods, 8, 340–347. https://doi.org/10.1016/j.jff.2014.03.031
- Li, W., Li, T., & Tang, K. (2009). Flavonoids from mulberry leaves by microwave-assisted extract and anti-fatigue activity. African Journal of Agriculture Research, 40, 898–902. https://doi.org/10.1016/j.cnur.2005.04.001
- Liu, C., Xiang, W., Yu, Y., Qin, S. Z., Huang, X. Z., & Xu, L. (2015). Comparative analysis of 1-deoxynojirimycin contribution degree to α-glucosidase inhibitory activity and physiological distribution in Morus alba L. Industrial Crops Production, 70, 309–315. https://doi.org/10.1016/j.indcrop.2015.02.046
- Liu, J., Liu, C., Wang, C. H., Xu, L., Xiang, W., Ming, Y., … Ding, T. L. (2013). Contents and antioxidant activity of antioxidant substances in various organic solvent extraction fractions from Xinjiang medicinal mulberry branch ethanolic extract. Sericultural Science, 39, 14–19.
- Marnett, L. J. (2000). Oxyradicals and DNA damage. Carcinogenesis, 21, 361–370. https://doi.org/10.1093/carcin/21.3.361
- Miller, N. J., Sampson, J., Candeias, L. P., Bramley, P. M., & Rice Evans, C. A. (1996). Antioxidant activities of carotenes and xanthophylls. FEBS Letters, 384, 240–242. https://doi.org/10.1016/0014-5793(96)00323-7
- Moccia, S., Siano, F., Russo, G. L., Volpe, M. G., & Picariello, G. (2019). Antiproliferative and antioxidant effect of polar hemp extracts (Cannabis sativa L., Fedora cv.) in human colorectal cell lines. International Journal of Food Science and Nutrition, 30, 1–15. https://doi.org/10.1080/09637486.2019.1666804
- Nam, S., Jang, H. W., & Shibamoto, T. (2012). Antioxidant activities of extracts from teas prepared from medicinal plants, Morus alba L., Camellia sinensis L., and Cudrania tricuspidata, and their volatile components. Journal of Agricultural and Food Chemistry, 60, 9097–9105. https://doi.org/10.1021/jf301800x
- Nenadis, N., Wang, L. F., Tsimidou, M., & Zhang, H. Y. (2004). Estimation of scavenging activity of phenolic compounds using the ABTS·+ assay. Journal of Agricultural and Food Chemistry, 52, 4669–4674. https://doi.org/10.1021/jf0400056
- Priya, S. (2012). Medicinal values of mulberry—An overview. Journal of Pharmacy Research, 5, 3588–3596.
- Rotllan, N., & Fernández Hernando, C. (2012). MicroRNA regulation of cholesterol metabolism. Hindawi Publishing Corporation, 8, 847–849. https://doi.org/10.1155/2012/847849
- Russo, A., Acquaviva, R., Campisi, A., Sorrenti, V., Di Giacomo, C., Virgata, G., … Vanella, A. (2000). Bioflavonoids as antiradicals, antioxidants and DNA cleavage protectors. Cell Biology and Toxicology, 16, 91–98. https://doi.org/10.1023/A:1007685909018
- Sakanaka, S., Tachibana, Y., & Okada, Y. (2005). Preparation and antioxidant properties of extracts of Japanese persimmon leaf tea (kakinoha-cha). Food Chemistry., 89, 569–575. https://doi.org/10.1016/j.foodchem.2004.03.013
- Scalzo, J., Politi, A., Pellegrini, N., Mezzetti, B., & Battino, M. (2005). Plant genotype affects total antioxidant capacity and phenolic contents in fruit. Nutrition, 21, 207–213. https://doi.org/10.1016/j.nut.2004.03.025
- Slinkard, K., & Singleton, V. L. (1977). Total phenol analysis-automation and comparision with manual methods. American Journal of Enology Viticulture, 28, 49–55. https://doi.org/10.1002/star.19780301107
- Smirnoff, N., & Cumbes, Q. J. (1989). Hydroxyl radical scavenging activity of compatible solutes. Phytochemistry, 28, 1057–1060. https://doi.org/10.1016/0031-9422(89)80182-7
- Tai, Z., Cai, L., Dai, L., Dong, L., Wang, M., Yang, Y., … Ding, Z. (2011). Antioxidant activity and chemical constituents of edible flower of Sophora viciifolia. Food Chemistry, 126, 1648–1654. https://doi.org/10.1016/j.foodchem.2010.12.048
- Teleszko, M., & Wojdylo, A. (2015). Comparison of phenolic compounds and antioxidant potential between selected edible fruits and their leaves. Journal of Functional Foods, 14, 736–746. https://doi.org/10.1016/j.jff.2015.02.041
- Tong, H. K., Jin, Y. H., Kim, H. B., Ryu, J. H., & Sun, Y. K. (2006). Neuroprotective effects of the cyanidin-3-O-β-D-glucopyranoside isolated from mulberry fruit against cerebral ischemia. Neuroscience Letters, 391, 122–126. https://doi.org/10.1016/j.neulet.2005.08.053
- Thabti, I., Elfalleh, W., Hannachi, H., Ferchichi, A., & Campos, M. G. (2012). Identification and quantification of phenolic acids and flavonol glycosides in Tunisian Morus species by HPLC-DAD and HPLC-MS. Journal of Functional Foods, 4, 367–374. https://doi.org/10.1016/j.jff.2012.01.006
- Thabti, I., Elfalleh, W., Tlili, N., Ziadi, M., Campos, M. G., & Ferchichi, A. (2014). Phenols, flavonoids, and antioxidant and antibacterial activity of leaves and stem bark of morus species. International Journal of Food Properties, 17, 842–854. https://doi.org/10.1080/10942912.2012.660722
- Thabti, I., Marzougui, N., Elfalleh, W., & Ferchichi, A. (2011). Antioxidant composition and antioxidant activity of white (Morus alba L.), black (Morus nigra L.) and red (Morus rubra L.) mulberry leaves. Acta Botanica Gallica, 158, 205–214. https://doi.org/10.1080/12538078.211.10516267
- Vu, H. T., Scarlett, C. J., & Vuong, Q. V. (2017). Optimization of ultrasound-assisted extraction conditions for recovery of phenolic compounds and antioxidant capacity from banana (musa cavendish) peel. Journal of Food Processing and Preservation, 41, 1–14. https://doi.org/10.1111/jfpp.13148
- Wang, C. H., Liu, C., Liu, J., Xiang, W., Huang, X. Z., & Xu, L. (2014). Antioxidant activity of medicine mulberry (Morus nigra) in Xinjiang. Scientia Silyae Sinicae, 8, 8. https://doi.org/10.11707/j.1001-7488.20140808
- Wang, J., & Shahidi, F. (2014). Acidolysis of p-coumaric acid with omega-3 oils and antioxidant activity of phenolipid products in vitro and biological model systems. Journal of Agricultural and Food Chemistry, 62, 454–461. https://doi.org/10.1021/jf404140v
- Wang, L., Sun, X., Li, F., Yu, D., Liu, X., Huang, W., & Zhan, J. (2015). Dynamic changes in phenolic compounds, colour and antioxidant activity of mulberry wine during alcoholic fermentation. Journal of Functional Foods, 18, 254–265. https://doi.org/10.1016/j.jff.2015.07.013
- Wang, W., Li, X., Bao, X., Gao, L., & Tao, Y. (2018). Extraction of polysaccharides from black mulberry fruit and their effect on enhancing antioxidant activity. International Journal of Biology Macromolecule, 120, 1420–1429. https://doi.org/10.1016/j.ijbiomac.2018.09.132
- Wu, X., Liang, L., Zou, Y., Zhao, T., Zhao, J., Li, F., & Yang, L. (2011). Aqueous two-phase extraction, identification and antioxidant activity of anthocyanins from mulberry (Morus atropurpurea Roxb.). Food Chemistry, 129, 443–453. https://doi.org/10.1016/j.foodchem.2011.04.097
- Xu, D-B. (2003). The new establishment of a cholesterol-lowering drug screening technology platform. China: Fu Dan University. https://doi.org/10.7666/d.y555286
- Xu, L. (2006). Studies on the phytochemistry and bioactivity of mulberry. China: Southwest University. https://doi.org/10.7666/d.y937833
- Yen, G. C., & Chen, H. Y. (1995). Antioxidant activity of various tea extracts in relation to their antimutagenicity. Journal of Agricultural and Food Chemistry, 43, 27–32. https://doi.org/10.1021/jf00049a007
- Yuan, Z., & Wang, Z. Z. (2009). Phenolic composition and antioxidant activities of two Phlomis species: A correlation study. Comptes Rendus Biologies, 332, 816–826. https://doi.org/10.1016/j.crvi.2009.05.006