1.Department of Pharmacy,Xinfeng People's Hospital,Xinfeng,Jiangxi 341600
2.Applied Technical Engineering Center of Further Processing and Safety of Agricultural Products,Higher Education Institutions of Fujian,Zhangzhou,Fujian 363000
Objective : Exploring the in vitro antioxidant activity of polyphenols from Sargassum fusiforme and their protective effects against H2O2-induced damage in human aortic endothelial cells (HAECs), thereby providing a theoretical basis for their application and development in functional food and pharmaceutical fields. Methods Polyphenols from Sargassum fusiforme were extracted from Sargassum fusiforme with 60% ethanol, followed by defatted with petroleum ether and purification via silica gel column chromatography. The in vitro antioxidant capacity was assessed by measuring scavenging activities against 1, 1-diphenyl-2-picrylhydrazyl (DPPH) radicals, superoxide anion (O2⁻) radicals, and 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS+) radicals. An oxidative damage model was established in HAECs induced by H2O2 to evaluate the effects of polyphenols from Sargassum fusiforme on cell viability and analyze the dose-response relationship. Results The polyphenols from Sargassum fusiforme showed significant scavenging ability to all three free radicals, and its half-maximal inhibitory concentration (IC50) was: DPPH radical 0.074 mg·mL-1, O₂⁻ radical 0.069 mg·mL-1, ABTS+ radical 0.089 mg·mL-1. In cellular experiments, polyphenols from Sargassum fusiforme alleviated H2O2-induced oxidative damage in HAECs in a concentration-dependent manner and significantly enhanced cell viability (P<0.05). Conclusion The polyphenols from Sargassum fusiforme exhibit potent in vitro antioxidant activity and obvious cytoprotection. They act as natural antioxidants for functional foods or biomedical applications to prevent oxidative stress-related diseases.
本研究在H2O2诱导的HAEC模型中验证了羊栖菜多酚的保护作用,对O₂⁻自由基和ABTS+自由基的清除能力弱于维生素C可能是羊栖菜多酚对脂溶性自由基(如DPPH)具有更高亲和力,这与褐藻多酚的疏水性结构特征相符[10]。相较于LEE H H等[22]研究仅关注羊栖菜酚类含量与抗氧化活性的相关性,本研究优化了羊栖菜多酚的提取纯化工艺,通过60%乙醇浸提结合硅胶柱层析梯度洗脱,实现了多酚类物质的高效富集与纯化,为后续活性成分研究及产业化制备提供了可参考的工艺参数;同时,首次聚焦羊栖菜多酚对H₂O₂诱导的HAEC细胞氧化损伤的保护作用,明确其在该细胞模型中的剂量依赖性保护效果及安全浓度范围,为其在心血管相关功能性食品或辅助药物开发中的应用提供了更具针对性的实验依据。后续我们拟通过制备型HPLC分离鉴定羊栖菜多酚中关键活性单体并分析构效关系;并开展动物模型验证羊栖菜多酚对心血管疾病的干预效果,通过检测细胞内ROS水平及GSH/GSSG比值,探究羊栖菜多酚调节细胞内抗氧化酶(SOD和CAT)的机制。进一步解析羊栖菜多酚的分子机制及体内外活性相关性,并开发纳米递送系统以提高其生物利用度,为羊栖菜多酚作为功能性食品添加剂或辅助药物的开发提供更全面的科学依据。
LIUT, SUNL, ZHANGY, et al. Imbalanced GSH/ROS and sequential cell death[J]. J Biochem Mol Toxicol, 2022,36(1):e22942.
[5]
SIESH, BELOUSOVV V, CHANDELN S, et al. Defining roles of specific reactive oxygen species (ROS) in cell biology and physiology[J]. JNat Rev Mol Cell Biol, 2022,23(7):499-515.
PRASADS, GUPTAS C, TYAGIA K. Reactive oxygen species (ROS) and cancer: role of antioxidative nutraceuticals[J]. Cancer Lett, 2017,387:95-105.
[8]
MARTEMUCCIG, COSTAGLIOLAC, MARIANOM, et al. Free radical properties source and targets antioxidant consumption and health[J]. Oxygen, 2022,2(2):48-78.
[9]
AKBARIB, BAGHAEI-YAZDIN, BAHMAIEM, et al. The role of plant-derived natural antioxidants in reduction of oxidative stress[J]. Biofactors, 2022,48(3):611-633.
[10]
HODHODIA, BABAKHANIA, ROSTAMZADH. Effect of different extraction conditions on phlorotannin content and antioxidant activity of extract from brown algae (Sargassum angustifolium)[J]. J Food Process Preserv, 2022,46(3):e16307.
[11]
PEREIRAL, COTASJ. Therapeutic potential of polyphenols and other micronutrients of marine origin[J]. Mar Drugs, 2023,21(3):323.
[12]
孔秋红.羊栖菜多糖的制备及对肠道屏障的保护作用研究[D].广州:华南理工大学,2021.
[13]
WANGY, CHENL, ZHANGH, et al.Comparison of solvent effects on polyphenol extraction and antioxidant activity from Sargassum fusiforme (Hijiki)[J]. Journal of Ocean University of China, 2020,19(3):689-698.
[14]
WANGL, CUIY R, LEEH G, et al. Fucoidan isolated from fermented Sargassum fusiforme suppresses oxidative stress through stimulating the expression of superoxidase dismutase and catalase by regulating Nrf2 signaling pathway[J]. Int J Biol Macromol, 2022,209(Pt A):935-941.
BALIYANS, MUKHERJEER, PRIYADARSHINIA, et al.Determination of antioxidants by DPPH radical scavenging activity and quantitative phytochemical analysis of Ficus religiosa[J]. Molecules, 2022,27(4):1326.
[18]
RUMPFJ, BURGERR, SCHULZEM. Statistical evaluation of DPPH, ABTS, FRAP, and Folin-Ciocalteu assays to assess the antioxidant capacity of lignins[J]. Int J Biol Macromol, 2023,233:123470.
[19]
MAHENDRANS, MAHESWARIP, SASIKALAV, et al.In vitro antioxidant study of polyphenol from red seaweeds dichotomously branched gracilaria Gracilaria edulis and robust sea moss Hypnea valentiae[J]. Toxicol Rep, 2021,8:1404-1411.
FORMANH J, ZHANGH. Targeting oxidative stress in disease: promise and limitations of antioxidant therapy[J]. Nat Rev Drug Discov, 2021,20(9):689-709.
[22]
LEEH H, KIMJ S, JEONGJ H, et al. Comparative analysis of biological activities and phenolic content between fresh and steamed Sargassum fusiforme in different extraction solvents[J]. Appl Sci, 2022,12(23):12161.