共查询到17条相似文献,搜索用时 46 毫秒
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肝脏是人体重要的解毒器官,易受到有害物质损伤而演变为各种类型的肝脏疾病,严重危害人类健康,防治肝病备受关注。与传统化学药物治疗肝病相比,天然来源的护肝活性物具有安全、高效且副作用低等优点,已被广泛应用于肝病的防治,开发具有多途径、多靶点护肝作用的天然活性物是防治肝病的重要保障。鞣花酸(Ellagic acid,EA)是自然界中天然的多酚物质,具有良好的抗氧化、抗炎等生物活性,尤其在护肝活性方面展示出了极大的潜力,受到国内外学者广泛深入的研究;然而,EA护肝作用的研究工作尚缺少归纳总结。因此,本文旨在综述EA护肝作用及其分子机制研究进展,为其今后在防控肝脏疾病方面的研究与应用提供理论依据。 相似文献
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为探究鞣花酸对甲醛引起的小鼠肝损伤的保护机制,选取32只8周龄雄性ICR小鼠随机分为对照组(生理盐水),甲醛模型组(333 mmol/L),鞣花酸低剂量组(33 mmol/L)和鞣花酸高剂量组(66 mmol/L)。连续灌胃14 d后,解剖并获取肝脏,用于称重且计算其肝脏指数,观察肝脏的形态学变化,分析肝脏中的丙二醛含量(MDA)和超氧化物歧化酶活性(SOD),并通过荧光定量PCR检测肝脏的细胞因子表达水平。与甲醛模型组相比,鞣花酸给药组的肝脏组织,肝细胞排列规则,肝细胞中空泡减少;低剂量组SOD活性(0.97 U/mg)和SOD1(0.98)、SOD2(0.98)表达水平增加,MDA含量(38.51 nmol/mg)和NF-κB(0.78)、IL-1β(0.63)、IL-6(0.87)、TNF-α(0.85)、Bax(0.70)、Caspase-3(0.96)的表达水平降低,高剂量组SOD活性(1.16 U/mg)和SOD1(1.23)、SOD2(1.11),表达水平增加,MDA含量(43.25 nmol/mg)和NF-κB(0.49)、IL-1β(0.61)、IL-6(0.38)、TNF-α(0.79)、Bax(0.68)、Caspase-3(0.93)的表达水平降低。结果表明,鞣花酸通过其抗氧化,抗炎和抗凋亡的特性对甲醛诱导的小鼠肝损伤具有一定的保护作用。 相似文献
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鞣花酸和石榴皮多酚提取物抗氧化活性的比较 总被引:1,自引:0,他引:1
对鞣花酸提取物(EA)和石榴皮多酚提取物(PE)的抗氧化活性进行比较研究。通过HPLC法检测EA和PE中鞣花酸的含量,Folin-酚法检测PE中总多酚含量;采用H2O2处理HepG2细胞建立细胞氧化应激损伤模型,MTT法比较不同浓度的EA和PE对HepG2细胞氧化应激损伤的保护作用;采用DPPH法、·OH清除法检测PE和EA体外抗氧化作用。结果表明:与EA相比,PE中鞣花酸含量很低,但PE和EA均以剂量依赖的方式提高氧化损伤的HepG2细胞生存率,有显著的保护作用,且在同一的浓度下,PE的保护作用显著高于EA。PE和EA对DPPH法、·OH清除法的清除率均呈剂量依赖性增强。 相似文献
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通过鞣花酸清除自由基、抑制亚油酸自氧化、还原铁离子(Fe3+)能力实验研究其抗氧化活性;以过氧化氢(H2O2)诱导PC-12细胞建立氧化损伤模型,探索鞣花酸对PC-12细胞氧化应激损伤的保护作用,建立鞣花酸抗氧化活性与对细胞氧化应激损伤之间的联系。结果表明,鞣花酸对羟基自由基(·OH)、超氧阴离子自由基(·O2-)、ABTS+·自由基清除的半抑制浓度分别为92.14、36.70、47.91μg/mL;对亚油酸自氧化的抑制率高达90%;对铁离子具有很强的还原能力。鞣花酸对H2O2诱导的PC-12细胞氧化损伤具有良好的保护作用,且与抗氧化活性之间具有良好的相关系。鞣花酸对细胞氧化损伤的保护作用可能与提高细胞的抗氧化能力有关。 相似文献
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贺林娇;李倩;海妮·金格斯;黄新新;李佳豪;经宏鑫;李超;马超宇;蔺建薇;王卓;李晓斌 《中国乳品工业》2024,(5):21-25
文章探究补喂鞣花酸对放牧条件下泌乳期伊犁马血液生化指标的影响,为鞣花酸作为饲料添加剂调节泌乳期家畜的健康提供研究基础。将18匹泌乳期伊犁马母马随机分为3组,每组6匹,分别为对照组、试验Ⅰ组和试验Ⅱ组。在相同的饲养管理条件下,对照组母马不进行任何添加剂处理,试验Ⅰ组母马每天每匹补喂有效含量15 mg/kg体质量的鞣花酸,试验Ⅱ组母马每天每匹补喂有效含量30 mg/kg体质量的鞣花酸,试验期为90 d,定期采集马匹血液样品,测定相关指标。结果表明,试验Ⅰ组母马血液葡萄糖和直接胆红素水平均极显著低于对照组(P<0.01);试验Ⅱ组血液甘油三酯水平极显著高于试验Ⅰ组(P<0.01)。试验Ⅱ组母马血液天门冬氨酸氨基转移酶和肌酸激酶均显著低于对照组(P<0.05);试验Ⅱ组母马血液碱性磷酸酶极显著低于对照组和试验Ⅰ组(P<0.01);试验Ⅰ组γ-谷氨酰转移酶极显著高于对照组和试验Ⅱ组(P<0.01);试验Ⅱ组母马血液乳酸脱氢酶水平极显著低于对照组和试验Ⅰ组(P<0.01)。试验Ⅰ组母马血液铁极显著高于对照组(P<0.01)。因此,在本试验条件下,泌乳期伊犁马每天补喂有效含量15 mg/kg体质量的鞣花酸可显著降低血糖、甘油三酯和直接胆红素水平,提高γ-谷氨酰转移酶和铁的含量;每天补喂有效含量30 mg/kg体质量的鞣花酸可以降低母马血液天门冬氨酸氨基转移酶、碱性磷酸酶、肌酸激酶和乳酸脱氢酶活性。 相似文献
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ABSTRACT: Antioxidant and anti-inflammatory activities are extensively used to screen chemo-preventive foods. Five well-known anticancer spices, ginger, red pepper, garlic, green onion, and leek, were selected and assessed in this study. Antioxidant function was evaluated based on the scavenging ability of the cation radical ABTS+ . Moreover, anti-inflammatory activity was determined based on the inhibitory effect of nitric oxide (NO) production by lipopolysaccharide (LPS)-activated macrophages. The antioxidant activity of the 5 spices followed this order: ginger > red pepper > leek > green onion and garlic. All of these spices had a strict inhibitory effect on NO production. The anti-inflammatory activity could be ranked based on the IC50 of the spices, as garlic > ginger > green onion > leek and red pepper. Additionally, a significant correlation existed between antioxidant activity and total phenolics content. Obviously, total phenolics content was a crucial determinant of the antioxidant but not the anti-inflammatory activity of foods. The compounds responsible for the anti-inflammatory activity should differ from those responsible for the antioxidant activity. 相似文献
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HPLC法测定白兰地中鞣花酸 总被引:2,自引:0,他引:2
运用高效液相色谱法(HPLC)建立一种测定白兰地中鞣花酸含量的方法,该方法简单快速,准确性和稳定性好。通过测定发现,不同品质的白兰地中鞣花酸含量不同。该研究也为进口白兰地的品质和酒龄鉴定提供一种可行的方法。 相似文献
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利用光谱法研究了石榴皮中鞣花酸的抗衰老性能和机理。首先,通过分光光度法考察了鞣花酸对DPPH·、·OH和·O2-等3种自由基的清除率和弹性蛋白酶抑制率,结果证明了鞣花酸抗衰老能力强。其次,以弹性蛋白酶为研究对象,利用光谱法探讨了鞣花酸对弹性蛋白酶的作用机理。结果表明,鞣花酸与弹性蛋白酶发生作用并形成络合物,当鞣花酸的质量浓度为4.57 mg/m L时,鞣花酸对弹性蛋白酶的抑制率高达88.26%。当鞣花酸浓度低于4.0×10-5mol/L时,其荧光猝灭机理主要是静态猝灭,鞣花酸浓度较高时动态猝灭所占比例增加。因此,鞣花酸可以作为天然自由基清除剂与弹性蛋白酶抑制剂应用于抗衰老化妆品中。 相似文献
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Ellagic acid sedimentation in white muscadine grape juice was monitored following different processing treatments and storage temperatures. High storage temperatures (40°C) greatly accelerated sediment formation, and pasteurization (100°C, 10 min) resulted in a faster sediment formation than sterile filtration. Sediment also increased substantially after juice was hydrolyzed (121°C and pH 2 for 10 min). Ultrafiltration of juice through a 10,000 or 30,000 dalton membrane resulted in significantly less sediment formation in the juice. Treatment of juice with polyvinylpolypyrrolidone (0.1– 0.2 g/L juice), egg albumen (6–10 mg/L juice) or gelatin (0.05 – 0.4 g/L juice) resulted in a significant reduction of juice phenolics and sediment formation. A commercial pectinase added to the grapes increased sediment formation and total phenolics in the juice. Levels of ellagic acid in juice were very low and did not correlate well with amount of sediment formed. 相似文献
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María R Williner María E Pirovani Daniel R Güemes 《Journal of the science of food and agriculture》2003,83(8):842-845
Ellagic acid is a phenolic compound which occurs naturally in strawberries. Interest in ellagic acid has increased during the past few years owing to its properties as a micronutrient. The objective of this study was to determine the ellagic acid content in strawberries compared with that in other common fruits and to evaluate its variability, the effects of ripening stage, and the tissue and seasonal variability in selected cultivars widely grown in Argentina. Strawberries showed significantly higher levels of ellagic acid than many other fruits of economic importance, ranging from 0.16 to 2.07 mg g?1 dry weight. The ellagic acid content was highest in green fruit, intermediate in mid‐ripe fruit and lowest in full‐ripe fruit. Cultivars ‘Chandler’ and ‘Camarosa’ contained the highest amounts of ellagic acid in strawberries with edible value (0.78 and 0.70 mg g?1 dry weight respectively), while ‘Oso Grande’ and ‘Milsei’ exhibited the lowest (0.35 and 0.31 mg g?1 dry weight respectively). Moreover, the level of this phytochemical was found to be higher when considering pulp with achenes compared with pulp without achenes. Copyright © 2003 Society of Chemical Industry 相似文献