antioxidant activity

抗氧化活性
  • 文章类型: Journal Article
    This work examines the capacity of Naringin and Rutin to influence the DNA damage response (DDR) pathway by investigating their interactions with key DDR proteins, including PARP-1, ATM, ATR, CHK1, and WEE1. Through a combination of in silico molecular docking and in vitro evaluations, we investigated the cytotoxic and genotoxic effects of these compounds on MDA-MB-231 cells, comparing them to normal human fibroblast cells (2DD) and quiescent fibroblast cells (QFC). The research found that Naringin and Rutin had strong affinities for DDR pathway proteins, indicating their capacity to specifically regulate DDR pathways in cancer cells. Both compounds exhibited preferential cytotoxicity towards cancer cells while preserving the vitality of normal 2DD fibroblast cells, as demonstrated by cytotoxicity experiments conducted at a dose of 10 µM. The comet experiments performed particularly on QFC cells provide valuable information on the genotoxic impact of Naringin and Rutin, highlighting the targeted initiation of DNA damage in cancer cells. The need to use precise cell models to appropriately evaluate toxicity and genotoxicity is emphasized by this discrepancy. In addition, ADMET and drug-likeness investigations have emphasized the pharmacological potential of these compounds; however, they have also pointed out the necessity for optimization to improve their therapeutic profiles. The antioxidant capabilities of Naringin and Rutin were assessed using DPPH and free radical scavenging assays at a concentration of 10 µM. The results confirmed that both compounds have a role in reducing oxidative stress, hence enhancing their anticancer effects. Overall, Naringin and Rutin show potential as medicines for modulating the DDR in cancer treatment. They exhibit selective toxicity towards cancer cells while sparing normal cells and possess strong antioxidant properties. This analysis enhances our understanding of the therapeutic uses of natural chemicals in cancer treatment, supporting the need for more research on their mechanisms of action and clinical effectiveness.
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  • 文章类型: Journal Article
    A selection of formulations with different polymers and concentrations of green tea extract was conducted for application as interleafs in sliced meat products. Films were formulated using cellulose acetate, corn starch, and chitosan with the addition of 1.0, 2.5, and 5.0% green tea extract. Higher antioxidant activity was observed with the 1.0% concentration of green tea extract (P < 0.05), regardless of the formulation, with continuous release of the extract for up to 60 days and average IC50 of 0.09 and 0.31 mg/mL for the corn starch and chitosan active films, respectively. Interleafing the sliced ham resulted in lower lipid oxidation after 60 days of storage (P < 0.05). Starch-based films with green tea extract were effective, significantly reducing lipid oxidation in sliced and interleafed cooked ham, suggesting their potential to extend the shelf life of these refrigerated products.
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  • 文章类型: Journal Article
    This study aimed to investigate the impact of pan- and air fryer-roasting on the volatiles, umami compounds, antioxidant activity, and sensory attributes of dried laver (Porphyra dentata). To assess the influence of time and temperature, pan-roasting was conducted at temperatures of 250, 300, and 350 °C for 5, 10, and 15 s, respectively. For air fryer-roasting, dried laver was roasted at 160, 170, and 180 °C for 2, 4, and 6 min, respectively. In both roasting methods, the levels of 1,5-octadien-3-ol and 1-octen-3-ol significantly decreased (p < 0.05) with increased time and temperature. The Equivalent Umami Concentration ranged from 94.89 to 518.09 g MSG/100 g. The antioxidant activity significantly increased (p < 0.05) with higher roasting temperatures and longer durations, whereas pigment content significantly decreased. The browning index increased by 64% and 43% for the pan and air frying methods, respectively. The samples pan-roasted at 300 °C for 15 s obtained the highest sensory scores.
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  • 文章类型: Journal Article
    锯缘石杉是一种传统的中草药,因其生产石杉碱甲(HupA)而备受关注。HupA已显示出治疗阿尔茨海默病(AD)的希望。然而,HupA的生物合成途径和分子机制尚不清楚。
    进行了整合转录组和代谢组分析,以揭示与锯缘石杉树中HupA生物合成和抗氧化活性相关的分子机制。
    HT(体外H.serratathallus)比WH(野生H.serrata)表现出更高的抗氧化活性和更低的细胞毒性。通过层次聚类分析和qRT-PCR验证,检测到7个与HupA生物合成相关的重要酶基因和13个转录因子(TFs)。其中,CYP(细胞色素P450)和CAO(铜胺氧化酶)的平均|log2FC|值最大。代谢组学分析鉴定了12种参与HupA生物合成的代谢物和29种与抗氧化活性相关的代谢物。KEGG共富集分析显示,托烷,哌啶和吡啶生物碱的生物合成参与了HupA的生物合成途径。此外,类苯丙素,苯丙氨酸,发现黄酮类生物合成途径可调节锯缘的抗氧化活性。该研究还确定了与抗氧化活性调节相关的七个重要基因,包括PrAO(伯胺氧化酶)。基于上述联合分析,构建了锯缘HupA的生物合成途径和潜在的抗氧化机制。
    通过差异转录组和代谢组分析,鉴定了参与HupA生物合成和抗氧化相关的DEGs和DAMs,构建了与锯缘石杉HupA生物合成和抗氧化相关的潜在代谢途径。这项研究将为HupA生物合成机制和锯缘H.serratathallus的药用价值提供有价值的见解。
    UNASSIGNED: Huperzia serrata is a traditional Chinese herb that has gained much attention for its production of Huperzine A (HupA). HupA has shown promise on treating Alzheimer\'s disease (AD). However, the biosynthetic pathway and molecular mechanism of HupA in H. serrata are still not well understood.
    UNASSIGNED: Integrated transcriptome and metabolome analysis was performed to reveal the molecular mechanisms related to HupA biosynthesis and antioxidant activity in Huperzia serrata.
    UNASSIGNED: HT (in vitro H. serrata thallus) exhibits higher antioxidant activity and lower cytotoxicity than WH (wild H. serrata). Through hierarchical clustering analysis and qRT-PCR verification, 7 important enzyme genes and 13 transcription factors (TFs) related to HupA biosynthesis were detected. Among them, the average |log2FC| value of CYP (Cytochrome P450) and CAO (Copper amine oxidase) was the largest. Metabolomic analysis identified 12 metabolites involved in the HupA biosynthesis and 29 metabolites related to antioxidant activity. KEGG co-enrichment analysis revealed that tropane, piperidine and pyridine alkaloid biosynthesis were involved in the HupA biosynthesis pathway. Furthermore, the phenylpropanoid, phenylalanine, and flavonoid biosynthesis pathway were found to regulate the antioxidant activity of H. serrata. The study also identified seven important genes related to the regulation of antioxidant activity, including PrAO (primary-amine oxidase). Based on the above joint analysis, the biosynthetic pathway of HupA and potential mechanisms of antioxidant in H. serrata was constructed.
    UNASSIGNED: Through differential transcriptome and metabolome analysis, DEGs and DAMs involved in HupA biosynthesis and antioxidant-related were identified, and the potential metabolic pathway related to HupA biosynthesis and antioxidant in Huperzia serrata were constructed. This study would provide valuable insights into the HupA biosynthesis mechanism and the H. serrata thallus medicinal value.
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  • 文章类型: Journal Article
    这项工作介绍了通过超声波和索氏提取法制备的带有花和浆果的叶子的乙醇提取物的化学成分和抗氧化活性的研究。总酚,类黄酮,用分光光度法测定花色苷含量。索氏提取法提取的带花叶样品中总酚类化合物(14.43mgGAE/gDW)和总黄酮(2.22mgQE/gDW)含量最丰富。相同的提取物显示出最好的抗氧化活性,DPPH的IC50值为0.71mg/mL,ABTS测定为0.38mg/mL,以及含量最高的没食子酸,咖啡酸,和金丝桃苷0.04毫克GAE/克DW,0.60mgCA/gDW和2.61mgHYP/gDW,分别,通过HPLC-ED测定。未检测到Vitexin。通过超声提取获得的浆果提取物具有最高的总花色苷含量(1.69mg/100gDW)。
    This work presents investigation of chemical composition and antioxidant activity of ethanolic extracts of leaves with flowers and berries prepared by ultrasound and Soxhlet extractions of Crataegus monogyna from Bosnia and Herzegovina. Total phenolic, flavonoid, and anthocyanin contents were measured by spectrophotometric methods. The sample of leaves with flowers extracted by Soxhlet extraction was the richest in the content of total phenolic compounds (14.43 mg GAE/g DW) and total flavonoids (2.22 mg QE/g DW). Same extract showed the best antioxidant activity with an IC50 value of 0.71 mg/mL for DPPH and 0.38 mg/mL for ABTS assay, as well as the highest content of gallic acid, caffeic acid, and hyperoside 0.04 mg GAE/g DW, 0.60 mg CA/g DW and 2.61 mg HYP/g DW, respectively, determined by HPLC-ED. Vitexin was not detected. The extract of berries obtained by ultrasound extraction had the highest amount of total anthocyanins (1.69 mg/100 g DW).
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  • 文章类型: Journal Article
    使用植物提取物合成金属纳米颗粒是环境友好的并且越来越感兴趣。然而,并非所有的植物提取物都能在合成上成功相遇。因此,寻找能还原合成反应中金属盐前驱体的高电位萃取物至关重要。本研究探讨了使用Caesalpiniasappan心材提取物合成氧化铜纳米颗粒(CuONPs)。在用作还原剂之前进行植物化学分析和提取物总酚含量的测定。在合适的合成条件下,溶液颜色向棕色的颜色变化证实了CuONPs的形成。获得的CuONPs使用紫外-可见光谱进行确认,光子相关光谱学,X射线衍射,扫描电子显微镜,能量色散X射线,和傅里叶变换红外分析。合成的CuONPs研究了抗氧化剂,抗糖基化,和抗菌活性。CuONPs通过猝灭自由基而具有抗氧化活性,IC50值为63.35µg/mL,还原活性的EC范围为3.19-10.27mM/mg。CuONPs还抑制了牛血清白蛋白/核糖模型中晚期糖基化终产物的形成,IC50值为17.05µg/mL。此外,CuONPs显示抑制人类病原体,包括革兰氏阳性金黄色葡萄球菌和革兰氏阴性大肠杆菌,以及防止生物膜形成和生物膜根除,最大抑制约。75%。我们的发现表明C.sappan提取物可用于获得高度生物活性的CuONPs,用于开发某些医疗设备和治疗剂。
    Synthesis of metal nanoparticles using plant extracts is environmentally friendly and of increasing interest. However, not all plant extracts can meet successfully on the synthesis. Therefore, searching for the high potential extracts that can reduce the metal salt precursor in the synthesis reaction is essential. The present study explores the synthesis of copper oxide nanoparticles (CuONPs) using Caesalpinia sappan heartwood extract. Phytochemical analysis and determination of the total phenolic content of the extract were performed before use as a reducing agent. Under the suitable synthesized condition, a color change in the color of the solutions to brown confirmed the formation of CuONPs. The obtained CuONPs were confirmed using ultraviolet-visible spectroscopy, photon correlation spectroscopy, X-ray diffraction, scanning electron microscope, energy dispersive X-ray, and Fourier transform infrared analysis. The synthesized CuONPs investigated for antioxidant, antiglycation, and antibacterial activities. CuONPs possessed antioxidant activities by quenching free radicals with an IC50 value of 63.35 µg/mL and reducing activity with an EC range of 3.19-10.27 mM/mg. CuONPs also inhibited the formation of advanced glycation end products in the bovine serum albumin/ribose model with an IC50 value of 17.05 µg/mL. In addition, CuONPs showed inhibition of human pathogens, including Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli, and prevention of biofilm formation and biofilm eradication, with maximum inhibition of approx. 75%. Our findings suggest that C. sappan extract can be used to obtain highly bioactive CuONPs for the development of certain medical devices and therapeutic agents.
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  • 文章类型: Journal Article
    研究了通过氧化魔芋葡甘聚糖(OKGM)表面修饰来增强原花青素脂质体(PC-Lip)的稳定性。OKGM包被的PC-Lip(OKGM-PC-Lip)的包封率和载药量显著上升。OKGM-PC-Lip的平均大小和PDI增加,而zeta电位与PC-Lip相比降低。用OKGM涂覆后,PC-唇膜流动性降低。OKGM-PC-Lip的形态表明在脂质体表面形成了OKGM“晕层”。氢键在OKGM和PC-Lip的结合中起着不可或缺的作用,用OKGM涂覆后,PC-Lip的相变温度略有升高。OKGM-PC-Lip在极端pH下的保留率高于PC-Lip。体外释放,在胃期,OKGM-PC-Lip和PC-Lip之间的累积释放没有显着差异,肠道期OKGM-PC-Lip的累积释放速率明显低于PC-Lip。OKGM-PC-Lip的抗氧化活性明显高于PC-Lip。这些结果表明,用OKGM涂覆后,PC-Lip对外部影响的抵抗力得到了有效增强。与其他多糖相比,由于多糖对人体健康的益处,OKGM包被的脂质体在功能性食品中可能更有前途和优势。
    The stability enhancement of proanthocyanidin-loaded liposomes (PC-Lip) via surface decoration with oxidized konjac glucomannan (OKGM) was investigated. The encapsulation efficiency and drug loading capacity of OKGM-coated PC-Lip (OKGM-PC-Lip) rose significantly. The average size and PDI of OKGM-PC-Lip increased, while the zeta potential decreased compared to those of PC-Lip. PC-Lip membrane fluidity reduced after coating with OKGM. The morphology of OKGM-PC-Lip showed that OKGM \"halo layer\" was formed on the liposome surface. Hydrogen bonding played an indispensable role in the combination between OKGM and PC-Lip, and the phase transition temperature of PC-Lip slightly increased after coating with OKGM. The retention rate of OKGM-PC-Lip was higher than that of PC-Lip at extreme pH. In vitro release, no significant difference in cumulative release was detected between OKGM-PC-Lip and PC-Lip at gastric stage, while the cumulative release rate of OKGM-PC-Lip was remarkably lower than that of PC-Lip at intestinal stage. The antioxidant activity of OKGM-PC-Lip was notably higher than that of PC-Lip. These results suggested that the resistance of PC-Lip to external influences was fruitfully enhanced after coating with OKGM. Compared with other polysaccharides, OKGM-coated liposomes may be more promising and advantageous in functional foods due to the polysaccharide\'s benefits to human health.
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  • 文章类型: Journal Article
    牛奶是生物活性肽的重要膳食来源,给个人带来显著的好处。在胃肠道消化产生的抗氧化短肽(二肽和三肽)中,其特征是生物利用度和生物可及性增强,而单独评估它们提出了一个劳动密集型和昂贵的挑战。基于4种不同类型的氨基酸描述符(物理化学,三维结构,量子,和拓扑属性)和用于特征选择的遗传算法,图1和4的机器学习预测模型分别针对具有ABTS自由基清除能力的二肽和三肽表现出优异的拟合和预测能力,以随机森林回归作为机器学习算法。有趣的是,N端氨基酸的电子性质被认为是影响含有酪氨酸和色氨酸的二肽抗氧化能力的唯一因素。来自潜在二肽和三肽的四种肽通过构建的预测模型表现出高度预测值。随后,在体外模拟消化过程中,通过定制的工作流程在山羊奶中总共筛选了45个二肽和52个三肽。除了已知的5种抗氧化二肽,在消化过程中对9种肽进行了定量,落在0.04至1.78mgL-1的范围内。特别值得注意的是具有N-末端酪氨酸的抗氧化二肽的有前途的体内功能,由计算机模拟分析支持。总的来说,这项研究探索了影响抗氧化短肽的关键分子特性,并通过机器学习从羊奶中高通量筛选具有抗氧化活性的潜在肽,从而促进从乳源蛋白质中鉴定新型生物活性肽,并为理解其消化过程中的代谢物铺平了道路。
    Milk serves as an important dietary source of bioactive peptides, offering notable benefits to individuals. Among the antioxidant short peptides (di- and tripeptides) generated from gastrointestinal digestion are characterized by enhanced bioavailability and bioaccessibility, while assessing them individually presents a labor-intensive and expensive challenge. Based on 4 distinct types of amino acid descriptors (physicochemical, 3D structural, quantum, and topological attributes) and genetic algorithms for feature selection, 1 and 4 machine learning predicted models separately for di- and tripeptides with ABTS radical scavenging capacity exhibited excellent fitting and prediction ability with random forest regression as machine learning algorithm. Intriguingly, the electronic properties of N-terminal amino acid were considered as only factor affecting the antioxidant capacity of dipeptides containing both tyrosine and tryptophan. Four peptides from the potential di- and tripeptides exhibited highly predicted values by the constructed predicted models. Subsequently, a total of 45 dipeptides and 52 tripeptides were screened by a customized workflow in goat milk during in vitro simulated digestion. In addition to 5 known antioxidant dipeptides, 9 peptides were quantified during digestion, falling within the range of 0.04 to 1.78 mg L-1. Particularly noteworthy was the promising in vivo functionality of antioxidant dipeptides with N-terminal tyrosine, supported by in silico assays. Overall, this investigation explored crucial molecular properties influencing antioxidant short peptides and high-throughput screening potential peptides with antioxidant activity from goat milk aided by machine learning, thereby facilitating the identification of novel bioactive peptides from milk-derived proteins and paving the way for understanding their metabolites during digestion.
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  • 文章类型: Journal Article
    纤维素纳米原纤维(CNFs)可以形成坚固的生物可降解薄膜;然而,由于它们的亲水性,水分会降低其机械和阻隔性能。玉米醇溶蛋白(CZ)是一种疏水蛋白,当通过肽键与CNF膜共价连接时,可以改善它们的疏水性。CZ与氨基苯乙酸和氨基苯甲酸酯化的CNF膜共价连接,然后评估改性的证据。疏水性,机械性能,和抗氧化活性。修改后,与对照CNF膜相比,2,2-二苯基-1-吡啶酰肼(DPPH)自由基的增加57%和(2,2'-氮杂-双(3-乙基苯并噻唑啉-6-磺酸)ABTS清除活性的增加证明了疏水性和抗氧化活性的增加,注意到在50°C储存14天期间低芥酸菜籽油中的硫代巴比妥酸反应性物质(TBARS)值降低。结果表明,用疏水蛋白如CZ修饰CNF膜可增加这些生物可降解膜的疏水性,同时提供活性抗氧化功能。
    Cellulose nanofibrils (CNFs) can form strong biodegradable films; however, due to their hydrophilicity, moisture can degrade their mechanical and barrier properties. Corn zein (CZ) is a hydrophobic protein that when covalently linked with CNF films through peptide bonds, may improve their hydrophobicity. CZ was covalently linked to aminophenylacetic acid and aminobenzoic acid esterified CNF films which were then assessed for evidence of modification, hydrophobicity, mechanical properties, and antioxidant activity. Upon modification, an increase in hydrophobicity and an increase in antioxidant activity as evidenced by 57% higher 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical and 26% higher (2,2\'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) ABTS scavenging activities when compared to control CNF films, and reduced thio barbituric acid reactive substances (TBARS) values in canola oil during 14 days of 50 °C storage were noted. Results demonstrate that modification of CNF films with a hydrophobic protein such as CZ can increase the hydrophobicity of these biodegradable films while providing active antioxidant functionality.
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  • 文章类型: Journal Article
    这项初步研究评估了食用开心果对超重年轻人认知能力和情绪的影响。开心果的特征(化学和营养),和基线最终,进行不受控制的营养干预(28克开心果/28天)。应用心理测量测试来估计认知表现和情绪;人体测量评估,生化分析,包括血浆抗氧化活性。坚果的主要成分是脂质(48.1%)。开心果消耗显着(p≤0.05)减少腰围(-1.47厘米),总胆固醇(-10.21mg/dL),LDL(-6.57mg/dL),和甘油三酯(-21.07毫克/分升),和增加血浆抗氧化活性。补充开心果改善了风险承受能力(p≤0.006)和决策策略(p≤0.002;BART任务),执行功能(BCST任务;p≤0.006),以及选择性和持续的注意力(Go/No-Go-test;p≤0.016)。焦虑的情绪状态被正向调节(p≤0.05),愤怒-敌意,悲伤-抑郁。这些结果首次显示了食用开心果对超重年轻人的认知表现和情绪的益处。
    This pilot study evaluated the impact of pistachio consumption on cognitive performance and mood in overweight young adults. Pistachios were characterized (chemical and nutraceutical), and a baseline-final, uncontrolled nutritional intervention was performed (28 g of pistachio/28 days). Psychometric tests were applied to estimate cognitive performance and mood; anthropometric evaluation, biochemical analysis, and plasma antioxidant activity were included. The main component of nuts was lipids (48.1%). Pistachios consumption significantly (p ≤ 0.05) reduced waist circumference (-1.47 cm), total cholesterol (-10.21 mg/dL), LDL (-6.57 mg/dL), and triglycerides (-21.07 mg/dL), and increased plasma antioxidant activity. Pistachio supplementation improved risk tolerance (p ≤ 0.006) and decision-making strategy (p ≤ 0.002; BART-task), executive functions (BCST-task; p ≤ 0.006), and selective and sustained attention (Go/No-Go-test; p ≤ 0.016). The mood state was positively modulated (p ≤ 0.05) for anxiety, anger-hostility, and sadness-depression. These results show for the first time the benefits of pistachio consumption on cognitive performance and mood in overweight young adults.
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