Biological

Biological
  • 文章类型: Journal Article
    本研究描述了以TG酶(TG)为交联剂合成壳聚糖-玉米蛋白(CSZ-TG)复合材料,以及将柑橘精油(EO)与合成的CSZ-TG共混制备壳聚糖基复合膜材料(CSZEO-TG)。将制备的复合膜材料用于新鲜草莓的保鲜,并通过扫描电子显微镜进行表征,傅里叶变换红外光谱,X-光谱衍射,拉伸性能,以及水蒸气和CO2渗透率。扫描电子显微镜结果表明,添加TG酶后,复合膜材料的表面光滑,傅里叶变换红外光谱结果表明,添加玉米蛋白(Z)后,复合膜材料的结构发生了变化。拉伸结果表明,添加TG酶后,复合膜材料的拉伸强度增加,添加EO后,复合膜材料的柔韧性增强。与纯壳聚糖膜(CS)相比,添加Z后复合膜材料的水蒸气和CO2阻隔性能,TG,EO变化不大,它们都表现出更好的水蒸气阻隔性能。CSZEO-TG复合膜材料溶液的抗氧化分析结果表明,该复合膜材料具有高效的抗氧化性能。通过失重指标评价复合膜材料对草莓贮藏期和品质的影响,硬度,衰变率,可溶性固体,可滴定酸含量,MDA含量,和四种酶的含量,SOD,POD,PPO和CAT。综合保鲜数据分析表明,CSZEO-TG具有最佳的保鲜性能,有效延长了草莓的货架期。
    This study describes the synthesis of Chitosan - corn protein (CSZ-TG) composites using TG enzyme (TG) as a cross-linking agent and the preparation of chitosan-based composite membrane material (CSZEO-TG) by blending citrus essential oil (EO) with the synthesized CSZ-TG. The prepared composite membrane material was used for fresh strawberry preservation and characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, X-spectral diffraction, tensile properties, and water vapor and CO2 permeability. Scanning electron microscopy results showed a smooth surface of the composite membrane material after the addition of TG enzyme, while Fourier transforms infrared spectroscopy results showed a structural change of the composite membrane material after the addition of corn protein (Z). The tensile results showed an increase in the tensile strength of the composite membrane material after the addition of TG enzyme, while the flexibility of the composite membrane material was enhanced after the addition of EO. Compared with the pure chitosan membrane (CS), the water vapor and CO2 barrier properties of the composite membrane material after the addition of Z, TG, and EO did not change much, and they all showed better water vapor barrier properties. The results of the antioxidant analysis of the solution of the CSZEO-TG composite membrane material showed that the composite membrane material had efficient antioxidant properties. The effects of the composite film material on the storage period and quality of strawberries were evaluated by the indicators of weight loss, hardness, decay rate, soluble solids, titratable acid content, MDA content, and the content of four enzymes, SOD, POD, PPO and CAT. Comprehensive freshness data analysis showed that CSZEO-TG had the best freshness preservation performance and effectively extended the shelf life of strawberries.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

    求助全文

  • 文章类型: Journal Article
    作为铀系列的衰变产物,210Pb在自然界中广泛传播,并具有很强的放射性和化学毒性。建立可靠有效的210Pb放射分析方法以支持环境和食品放射性监测计划至关重要。本文批判性地回顾了用于测定环境和生物样品中210Pb的分析方法,尤其是近年来的新发展。在不同分析步骤中应用的技术,包括样品预处理,分离,净化,总结和检测,并讨论了它们的利弊,为210Pb环境和生物测定提供了一个整体概述。
    As a decay product of uranium series, 210Pb spreads widely in the nature and imposes strong radiological and chemical toxicity. It is vital to establish reliable and efficient radioanalytical methods for 210Pb determination to support environment and food radioactivity monitoring programs. This article critically reviews analytical methods developed for determining 210Pb in environmental and biological samples, especially new development in recent years. Techniques applied throughout different analytical steps including sample pretreatment, separation, purification, and detection are summarized and their pros and cons are discussed to provide a holistic overview for 210Pb environmental and biological assay.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Journal Article
    全球人口老龄化给全世界的卫生保健系统带来了巨大的负担。虚弱与身体储备减少有关,被认为是老年人群不良事件的重要指标。因此,人们对虚弱的早期诊断和干预越来越感兴趣,但是导致虚弱的细胞机制仍然没有完全理解。慢性炎症与身体功能下降和疾病风险增加有关。此外,多项人类和动物研究表明,炎症可能是导致虚弱的最大原因。已经提出了一些炎症标志物来预测身体虚弱。然而,这些标志物在体弱患者中的临床应用方面的知识仍然存在很大的差距。因此,了解生物过程和确定公认的和可靠的标记是紧急和关键的任务,为老年医学。在本次审查中,我们大致总结了可能具有潜在诊断和治疗用途的炎症标志物,从而在不久的将来将其转化为针对虚弱老年人的医疗保健。
    Global population aging poses a tremendous burden on the health care system worldwide. Frailty is associated with decreased physical reserve and is considered an important indicator of adverse events in the older population. Therefore, there is growing interest in the early diagnosis and intervention of frailty, but the cellular mechanisms responsible for frailty are still not completely understood. Chronic inflammation is related to decreased physical function and increased disease risk. Additionally, multiple human and animal studies suggest that inflammation probably plays the largest role in contributing to frailty. Some inflammatory markers have been proposed to predict physical frailty. However, there are still large gaps in knowledge related to the clinical application of these markers in frail patients. Therefore, understanding the biological processes and identifying recognized and reliable markers are urgent and pivotal tasks for geriatricians. In the present review, we broadly summarize the inflammatory markers that may have potential diagnostic and therapeutic use, thereby translating them into health care for older people with frailty in the near future.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Journal Article
    背景:PPAR信号及其相关基因在慢性心力衰竭(CHF)的发病机制和进展中的作用仍然难以捉摸。
    方法:我们从基因表达综合(GEO)数据库获取了CHF样本的基因表达谱和相关基线信息,具体来自GSE57338项目。
    结果:来自GSE57338项目,我们得出了126个PPAR相关基因的表达值。然后建立蛋白质-蛋白质相互作用网络以说明潜在的蛋白质相互作用。ClueGO分析结果表明,这些基因主要参与跨质膜输出等功能,调节脂质代谢过程,脂肪酸代谢,循环系统血管过程,酒精代谢,甘油三酯代谢和调节脂质定位和对营养的反应。使用Cytoscape中的cytohubba插件,我们确定了ACADM,PPARG和CPT2作为HF发病机制和进展中的潜在中枢分子。随后的基因本体论和京都百科全书的基因和基因组分析探讨了这三个基因在CHF中的潜在生物学作用。免疫浸润分析表明,中性粒细胞和M2巨噬细胞的浸润水平可能受到这些基因的显著影响,从而在CHF机制中发挥作用。
    结论:我们的研究为PPAR相关基因在CHF发展中的意义提供了全面的见解。值得注意的是,基因ACADM,PPARG和CPT2成为临床干预的潜在目标。
    The role of PPAR signaling and its associated genes in the pathogenesis and progression of chronic heart failure (CHF) remains elusive.
    We accessed the gene expression profile and relevant baseline information of CHF samples from the Gene Expression Omnibus (GEO) database, specifically from the GSE57338 project.
    From GSE57338 project, we derived the expression value of 126 PPAR-related genes. A protein-protein interaction network was then established to illustrate potential protein interactions. ClueGO analysis results revealed that these genes predominantly participate in functions such as export across plasma membrane, regulation of lipid metabolic process, fatty acid metabolism, circulatory system vascular processes, alcohol metabolism, triglyceride metabolism and regulation of lipid localization and response to nutrient. Using the cytohubba plug-in in Cytoscape, we pinpointed ACADM, PPARG and CPT2 as potential central molecules in HF pathogenesis and progression. Subsequent Gene Ontology and Kyoto Encyclopedia of Genes and Genomes analysis delved into the potential biological role of these three genes in CHF. Immune infiltration analysis suggested that the infiltration level of neutrophils and M2 macrophages might be notably influenced by these genes, thereby playing a role in the CHF mechanism.
    Our research provides a comprehensive insight into the significance of PPAR associated genes in CHF development. Notably, the genes ACADM, PPARG and CPT2 emerged as potential targets for clinical interventions.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Journal Article
    背景:肝癌,消化系统中常见的恶性肿瘤,呈现出特别严峻的预后。在免疫微环境中,自然杀伤(NK)细胞在肝癌中的作用尚不清楚。
    方法:我们从癌症基因组图谱计划数据库中获取了肝癌患者的临床参数和基因表达数据,并使用R软件及其相关代码进行了所有分析。
    结果:在我们的研究中,我们深入研究了与肝细胞癌(HCC)中NK细胞交织的基因。利用QUANTISEQ和MCPCOUNTER算法来量化NK细胞,我们聚焦了对NK细胞募集至关重要的基因。在这些基因中,GDE1,WDFY3,DNAJB14,PKD2,DGAT2,SGMS2和MKNK2与患者预后密切相关。我们还绘制了这些基因在HCC环境中的单细胞表达轨迹。根据我们的发现,SGMS2已成为需要进一步审查的关键基因。我们对SGMS2的深入分析揭示了它对特定生物学途径的影响,它对免疫景观的贡献及其在HCC基因组不稳定性中的作用。由此得出,我们建立了一个根植于SGMS2相关基因的预测模型。该模型在训练和验证队列中都展示了显着的准确性。
    结论:总体而言,我们的调查强调了SGMS2的深远意义,SGMS2是NK细胞浸润的关键基因,在HCC的景观中,从而将其定位为肿瘤策略的潜在关键。
    BACKGROUND: Liver cancer, a common malignancy within the digestive system, presents with a particularly grim prognosis. Within the immune microenvironment, the role of natural killer (NK) cells in liver cancer remains unclear.
    METHODS: We sourced data on clinical parameters and gene expressions for liver cancer patients from The Cancer Genome Atlas Program database and carried out all analyses using R software and its relevant codes.
    RESULTS: In our research, we delved into the genes intertwined with NK cells in hepatocellular carcinoma (HCC). Leveraging the QUANTISEQ and MCPCOUNTER algorithms to quantify NK cells, we spotlighted genes vital to the recruitment of NK cells. Among these genes, GDE1, WDFY3, DNAJB14, PKD2, DGAT2, SGMS2 and MKNK2 showed a strong correlation with patient outcomes. We also mapped out the single-cell expression trajectories of these genes within the HCC milieu. From our findings, SGMS2 emerged as a key gene warranting further scrutiny. Our in-depth analysis of SGMS2 shed light on its influence over specific biological pathways, its contribution to the immune landscape and its role in genomic instability within HCC. Drawing from this, we formulated a predictive model rooted in SGMS2-associated genes. This model showcased remarkable precision across both training and validation cohorts.
    CONCLUSIONS: Overall, our investigation underscored the profound implications of SGMS2, a gene pivotal to NK cell infiltration, in the landscape of HCC, thereby positioning it as a potential linchpin in oncological strategies.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

    求助全文

  • 文章类型: Journal Article
    肝素是带负电荷的多糖,具有各种链长和亲水主链。由于其迷人的化学和物理性质,无毒,生物相容性,和生物降解性,肝素已广泛应用于不同的医学领域,如心血管和血液学。这篇综述重点介绍了用于各种生物医学应用的基于肝素的材料设计的最新和未来进展。物理化学和机械性能,生物相容性,毒性,讨论了肝素的生物降解性。此外,肝素基材料在各种生物医学领域的应用,如药物/基因递送,组织工程,癌症治疗,和生物传感器,被审查。最后,挑战,机遇,并总结了制备肝素基材料的未来前景。
    Heparin is a negatively charged polysaccharide with various chain lengths and a hydrophilic backbone. Due to its fascinating chemical and physical properties, nontoxicity, biocompatibility, and biodegradability, heparin has been extensively used in different fields of medicine, such as cardiovascular and hematology. This review highlights recent and future advancements in designing materials based on heparin for various biomedical applications. The physicochemical and mechanical properties, biocompatibility, toxicity, and biodegradability of heparin are discussed. In addition, the applications of heparin-based materials in various biomedical fields, such as drug/gene delivery, tissue engineering, cancer therapy, and biosensors, are reviewed. Finally, challenges, opportunities, and future perspectives in preparing heparin-based materials are summarized.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Journal Article
    芳香烃受体(AHR)是一种配体依赖性受体,属于碱性螺旋-环-螺旋(bHLH)转录因子超家族。已知经典AHR信号通路的激活诱导细胞色素P450酶的表达,促进人体内的解毒代谢。此外,AHR可以与多种信号通路相互作用,如表皮生长因子受体(EGFR),信号转导和转录激活因子3(STAT3),缺氧诱导因子-1α(HIF-1α),核因子κB(NF-κβ),雌激素受体(ER),和雄激素受体(AR)信号通路。在过去的30年里,一些研究报告说,各种化学物质,物理,或生物制剂,比如烟草,碳氢化合物,工业和农业化学废物,毒品,UV,病毒,和其他毒素,可能会影响AHR的表达或活动,促进癌症发展。因此,概述这些因素如何调节AHR介导的致癌作用是有价值的。目前的研究发现,许多化合物可以作为AHR配体驱动AHR靶基因的表达,如CYP1A1,CYP1B1,MMPs,和AXL,和其他发挥促增殖或抗凋亡作用的靶标,比如XIAP.此外,一些其他物理和化学制剂,如紫外线和3-甲基胆碱,可以促进AHR信号活动,增加一些致癌途径的信号活性,例如磷脂酰肌醇3-激酶/蛋白激酶B(PI3K/AKT)和丝裂原活化蛋白激酶/细胞外信号调节激酶(MAPK/ERK)途径。了解各种因素如何调节AHR介导的致癌过程有助于临床医生和科学家制定个性化的治疗策略,以提高抗癌治疗效果。由于许多报道了AHR在调节癌变中的作用的研究是临床前或观察性临床研究,没有探讨不同化学物质的详细机制,物理,或生物制剂促进AHR介导的致癌过程,未来的研究应集中在进行大规模和功能性研究,以揭示AHR在调节癌变过程中与不同因素相互作用的潜在机制.
    Aryl hydrocarbon receptor (AHR) is a ligand-dependent receptor that belongs to the superfamily of basic helix-loop-helix (bHLH) transcription factors. The activation of the canonical AHR signaling pathway is known to induce the expression of cytochrome P450 enzymes, facilitating the detoxification metabolism in the human body. Additionally, AHR could interact with various signaling pathways such as epidermal growth factor receptor (EGFR), signal transducer and activator of transcription 3 (STAT3), hypoxia-inducible factor-1α (HIF-1α), nuclear factor ekappa B (NF-κβ), estrogen receptor (ER), and androgen receptor (AR) signaling pathways. Over the past 30 years, several studies have reported that various chemical, physical, or biological agents, such as tobacco, hydrocarbon compounds, industrial and agricultural chemical wastes, drugs, UV, viruses, and other toxins, could affect AHR expression or activity, promoting cancer development. Thus, it is valuable to overview how these factors regulate AHR-mediated carcinogenesis. Current findings have reported that many compounds could act as AHR ligands to drive the expressions of AHR-target genes, such as CYP1A1, CYP1B1, MMPs, and AXL, and other targets that exert a pro-proliferation or anti-apoptotic effect, like XIAP. Furthermore, some other physical and chemical agents, such as UV and 3-methylcholanthrene, could promote AHR signaling activities, increasing the signaling activities of a few oncogenic pathways, such as the phosphatidylinositol 3-kinase/protein kinase B (PI3K/AKT) and mitogen-activated protein kinase/extracellular signal-regulated kinase (MAPK/ERK) pathways. Understanding how various factors regulate AHR-mediated carcinogenesis processes helps clinicians and scientists plan personalized therapeutic strategies to improve anti-cancer treatment efficacy. As many studies that have reported the roles of AHR in regulating carcinogenesis are preclinical or observational clinical studies that did not explore the detailed mechanisms of how different chemical, physical, or biological agents promote AHR-mediated carcinogenesis processes, future studies should focus on conducting large-scale and functional studies to unravel the underlying mechanism of how AHR interacts with different factors in regulating carcinogenesis processes.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

    求助全文

  • 文章类型: Journal Article
    有机光电器件由于其低成本而受到了相当大的关注,机械灵活性,带隙工程,亮度,和溶液的可加工性在一个广阔的领域。具体来说,实现有机光电子的可持续性,特别是在太阳能电池和发光器件中,是绿色电子发展的重要里程碑。最近,生物材料的利用已成为改变界面性质的有效手段,从而提高性能,有机发光二极管(OLED)的寿命和稳定性。生物材料可以被称为从植物中获得的必需可再生生物资源。动物和微生物。与传统的合成界面材料相比,生物界面材料(BIMs)在OLED中的应用还处于早期阶段,他们迷人的特征(比如他们的环保性质,生物降解性,易于修改,可持续性生物相容性,多功能结构,质子电导率和丰富的官能团)正迫使世界各地的研究人员构建具有更高效率的创新设备。在这方面,我们对BIM及其在下一代OLED器件发展中的意义进行了广泛的综述。我们强调了不同BIM的电气和物理特性,并解决了最近如何利用这些特性来制造高效的OLED器件。生物材料,如氨苄青霉素,脱氧核糖核酸(DNA),核碱基(NB)和木质素衍生物已经证明了作为用于OLED器件的空穴/电子传输层以及空穴/电子阻挡层的显著潜力。能够产生强界面偶极子的生物材料可以被认为是OLED应用的替代中间层材料的有希望的前景。
    Organic optoelectronic devices have received appreciable attention due to their low cost, mechanical flexibility, band-gap engineering, lightness, and solution processability over a broad area. Specifically, realizing sustainability in organic optoelectronics, especially in solar cells and light-emitting devices, is a crucial milestone in the evolution of green electronics. Recently, the utilization of biological materials has appeared as an efficient means to alter the interfacial properties, and hence improve the performance, lifetime and stability of organic light-emitting diodes (OLEDs). Biological materials can be known as essential renewable bio-resources obtained from plants, animals and microorganisms. The application of biological interfacial materials (BIMs) in OLEDs is still in its early phase compared to the conventional synthetic interfacial materials; however, their fascinating features (such as their eco-friendly nature, biodegradability, easy modification, sustainability, biocompatibility, versatile structures, proton conductivity and rich functional groups) are compelling researchers around the world to construct innovative devices with enhanced efficiency. In this regard, we provide an extensive review of BIMs and their significance in the evolution of next-generation OLED devices. We highlight the electrical and physical properties of different BIMs, and address how such characteristics have been recently exploited to make efficient OLED devices. Biological materials such as ampicillin, deoxyribonucleic acid (DNA), nucleobases (NBs) and lignin derivatives have demonstrated significant potential as hole/electron transport layers as well as hole/electron blocking layers for OLED devices. Biological materials capable of generating a strong interfacial dipole can be considered as a promising prospect for alternative interlayer materials for OLED applications.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Review
    由于它们的广泛发生和对人类健康和环境的有害影响,内分泌干扰危险化学品(EDHCs)已成为一个重要的问题。因此,已经开发了许多物理化学和生物修复技术来从各种环境基质中消除EDHCs。本文旨在全面概述消除EDHCs的最新修复技术。物理化学方法包括吸附,膜过滤,光催化,和高级氧化工艺。生物方法包括生物降解,植物修复,和微生物燃料电池。每种技术的有效性,优势,局限性,并讨论了影响其性能的因素。该评论还重点介绍了EDHCs补救的最新发展和未来前景。这篇综述为在不同环境基质中选择和优化EDHCs的修复技术提供了宝贵的见解。
    Due to their widespread occurrence and detrimental effects on human health and the environment, endocrine-disrupting hazardous chemicals (EDHCs) have become a significant concern. Therefore, numerous physicochemical and biological remediation techniques have been developed to eliminate EDHCs from various environmental matrices. This review paper aims to provide a comprehensive overview of the state-of-the-art remediation techniques for eliminating EDHCs. The physicochemical methods include adsorption, membrane filtration, photocatalysis, and advanced oxidation processes. The biological methods include biodegradation, phytoremediation, and microbial fuel cells. Each technique\'s effectiveness, advantages, limitations, and factors affecting their performance are discussed. The review also highlights recent developments and future perspectives in EDHCs remediation. This review provides valuable insights into selecting and optimizing remediation techniques for EDHCs in different environmental matrices.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

    求助全文

  • 文章类型: Journal Article
    背景:尽管已知睡眠质量与死亡率相关,睡眠质量差如何导致死亡风险增加尚不清楚.我们的目的是研究生活方式,心理社会和生物学因素介导了这种联系。
    方法:205,654名来自英国生物银行的参与者被用于分析。结果是万无一失的,到2022年2月,心血管疾病(CVD)和癌症死亡率。通过由基线时的五种睡眠行为组成的睡眠评分来评估暴露。生活方式,社会心理,和生物因素被认为是潜在的中介。基于Cox比例风险模型进行中介分析。
    结果:睡眠质量差与全因风险较高相关(危险比[HR]=1.098;95%CI:1.058-1.140),CVD(HR=1.139;95%CI:1.045-1.243)和癌症死亡率(HR=1.095;95%CI:1.040-1.152)。生活方式中介(吸烟,身体活动,久坐,BMI和饮食)可以解释睡眠质量差的个体全因死亡风险增加的2.6%至34.0%。自我报告的健康状况,脆弱,抑郁症,孤独感是这种关联途径的重要社会心理媒介。大约五分之一的关联可以通过CRP的生物学作用来解释。对于CVD和癌症死亡率观察到类似的介导模式。
    结论:在基线时测量暴露和介质,所以不能排除反向因果关系的可能性。
    结论:睡眠质量差与生活方式组合导致的死亡风险增加有关,社会心理和生物学途径。采用健康的生活方式和保持心理健康是降低死亡风险的具有成本效益的干预措施。
    Although sleep quality is known to be associated with mortality, how poor sleep quality contributes to an increased risk of mortality is still unknown. We aimed to examine whether lifestyle, psychosocial and biological factors mediate the association.
    205,654 participants from UK Biobank were used for the analysis. The outcome was all-cause, cardiovascular disease (CVD) and cancer mortality by February 2022. Exposure was assessed by a sleep score consisting of five sleep behaviors at baseline. Lifestyle, psychosocial, and biological factors are regarded as potential mediators. Mediation analysis based on Cox proportional hazards models was performed.
    Poor sleep quality was associated with a higher risk of all-cause (Hazard Ratio [HR] = 1.098; 95% CI: 1.058-1.140), CVD (HR = 1.139; 95% CI: 1.045-1.243) and cancer mortality (HR = 1.095; 95% CI: 1.040-1.152). Lifestyle mediators (smoking, physical activity, sedentary, BMI and diet) could explain between 2.6% and 34.0% of the increased risk of all-cause mortality in individuals with poor sleep quality. Self-reported health, frailty, depression, and loneliness were significant psychosocial mediators of this association pathway. About one-fifth of the association can be explained by the biological role of CRP. Similar mediating patterns were observed for CVD and cancer mortality.
    Both exposure and mediators were measured at baseline, so the possibility of reverse causality cannot be ruled out.
    Poor sleep quality is associated with an increased risk of death through a combination of lifestyle, psychosocial and biological pathways. Adopting healthy lifestyles and staying psychosocial well-being are cost-effective interventions to lower the risk of death.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

    求助全文

公众号