Physiological effect

  • 文章类型: Journal Article
    电子废物(电子废物)已被确定为新兴污染物,是目前增长最快的废物流。在过去的十年中,重大的技术发展和现代化导致了过时的快速积累,损坏和不需要的电气和电子设备(EEE)。电子产品主要由一系列含金属成分组成,当处理不当时,可能导致金属成分渗入环境,对人类和动物都构成健康风险。金属暴露可以诱导生物体的氧化应激,这可能会导致协同作用,拮抗和加性效应。在模拟的电子垃圾渗滤液中发现的金属丰度最高,镍(Ni),钡(Ba),锌(Zn),锂(Li),铁(Fe),铝(Al)和铜(Cu)。进行了96小时的急性暴露研究,以确定电子废物对测试生物Daniorerio的潜在毒性。生物标志物分析结果,以评估电子垃圾渗滤液诱导的生化和生理效应,显示对乙酰胆碱酯酶活性诱导的统计学显著影响,超氧化物歧化酶,过氧化氢酶活性,谷胱甘肽含量降低,谷胱甘肽S-转移酶,丙二醛和葡萄糖能量可用。综合生物标志物响应(IBRv2)分析显示,随着电子垃圾渗滤液的暴露浓度增加,会引起更大的生物标志物响应。
    Electronic waste (e-waste) has been identified as an emerging pollutant and is the fastest growing waste stream at the present time. Significant technological development and modernization within the last decade has led to the rapid accumulation of outdated, broken and unwanted electrical and electronic equipment (EEE). Electronic products mainly consist of a range of metal containing components that, when disposed of improperly, could result in metal constituents leached into the environment and posing a health risk to humans and animals alike. Metal exposure can induce oxidative stress in organisms, which could lead to synergistic, antagonistic and additive effects. The metals found highest in abundance in the simulated e-waste leachate, were nickel (Ni), barium (Ba), zinc (Zn), lithium (Li), iron (Fe), aluminium (Al) and copper (Cu). An acute exposure study was conducted over a 96 h period to determine the potential toxicity of e-waste on the test organism Danio rerio. Biomarker analysis results to assess the biochemical and physiological effects induced by e-waste leachate, showed a statistically significant effect induced on acetylcholinesterase activity, superoxide dismutase, catalase activity, reduced glutathione content, glutathione s-transferase, malondialdehyde and glucose energy available. The Integrated Biomarker Response (IBRv2) analysis revealed a greater biomarker response induced as the exposure concentration of e-waste leachate increased.
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  • 文章类型: Journal Article
    蛋白质甲基化是生物体经历的翻译后修饰(PTM)。这个过程被认为是表观遗传学研究的一部分。近年来,人们对蛋白质甲基化越来越感兴趣,特别是组蛋白甲基化,随着研究的进展。组蛋白的甲基化是一个动态过程,受到组蛋白甲基转移酶和去甲基酶的精细控制。此外,许多非组蛋白蛋白也经历甲基化,这些修改共同调节生理现象,包括RNA转录,翻译,信号转导,DNA损伤反应,和细胞周期。蛋白质精氨酸甲基化是蛋白质甲基化的一个关键方面,在调节细胞周期和修复DNA中起着重要作用。它也与各种疾病有关。因此,蛋白质精氨酸甲基转移酶(PRMT)作为治疗疾病的潜在治疗靶点,已经引起了广泛的关注。几种PRMT抑制剂处于I/II期临床试验中。本文旨在介绍其结构,生化功能,和PRMT的生物活性测定。此外,我们将回顾目前流行的PRMT抑制剂的结构-功能.通过对已知PRMT抑制剂的各种数据的分析,我们希望为未来的药物设计和开发提供宝贵的帮助。
    Protein methylation is a post-translational modification (PTM) that organisms undergo. This process is considered a part of epigenetics research. In recent years, there has been an increasing interest in protein methylation, particularly histone methylation, as research has advanced. Methylation of histones is a dynamic process that is subject to fine control by histone methyltransferases and demethylases. In addition, many non-histone proteins also undergo methylation, and these modifications collectively regulate physiological phenomena, including RNA transcription, translation, signal transduction, DNA damage response, and cell cycle. Protein arginine methylation is a crucial aspect of protein methylation, which plays a significant role in regulating the cell cycle and repairing DNA. It is also linked to various diseases. Therefore, protein arginine methyltransferases (PRMTs) that are involved in this process have gained considerable attention as a potential therapeutic target for treating diseases. Several PRMT inhibitors are in phase I/II clinical trials. This paper aims to introduce the structure, biochemical functions, and bioactivity assays of PRMTs. Additionally, we will review the structure-function of currently popular PRMT inhibitors. Through the analysis of various data on known PRMT inhibitors, we hope to provide valuable assistance for future drug design and development.
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  • 文章类型: Journal Article
    俯卧定位是一种体位肺募集动作,已被广泛研究,涉及心肺系统的益处和生理变化。然而,俯卧定位对于患者来说不是很舒适,因为当氧疗和其他监测设备仍然附接时,他们必须躺在肚子上一段时间。根据病人的观察,一些病人会改变更舒适的姿势,即使用右/左侧卧位。这项研究的目的是检查被诊断为严重COVID-19的非插管患者俯卧位和侧卧位的生理影响。
    这是一项前瞻性队列研究,对象是2021年6月1日至9月10日在大学医院获得非再呼吸面罩或高流量鼻插管的严重COVID-19患者。该研究共持续了2021天,涉及48名患者。患者每天早晨和下午假定俯卧位或侧卧位,持续4小时,并进行心肺参数和血气分析。据报道,它符合STROCSS标准。
    重症COVID-19患者接受常规氧疗(通过非再呼吸面罩)或高流量鼻插管的俯卧位和侧卧位患者的心肺参数和血气分析参数的动态变化没有显着差异。
    在未插管的严重COVID-19患者中,俯卧位和侧卧位的生理作用相似。因此,侧卧位可作为体位性肺复张术的替代方法,需要进一步的随机试验.
    UNASSIGNED: Prone positioning is one type of postural lung recruitment manoeuvre that has been widely studied regarding the benefits and physiological changes of the cardiorespiratory system. However, prone positioning is not very comfortable for the patients because they have to lie on their stomachs for a while when the oxygen therapy and other monitoring devices are still attached. Based on patient observations, some patients will change to more comfortable positions, namely using the right/left lateral decubitus position. The purpose of this research was to examine the physiological impact of prone and lateral decubitus position in non-intubated patients who were diagnosed with severe COVID-19.
    UNASSIGNED: It was a prospective cohort study in subsequent people with severe COVID-19 who obtained a non-rebreathing mask or high-flow nasal cannula at a University Hospital between 1 June and 10 September 2021. The study lasted for a total of 2021 days and involved 48 patients. The patients assumed the prone positioning or lateral decubitus every morning and afternoon for 4 h and were measured for cardiorespiratory parameters and blood gas analysis. It has been reported in line with the STROCSS criteria.
    UNASSIGNED: Dynamic changes based on cardiorespiratory parameters and blood gas analysis parameters in patients with prone and lateral decubitus position in patients with severe COVID-19 receiving conventional oxygen therapy (via non-rebreathing mask) or high-flow nasal cannula did not show any significant difference.
    UNASSIGNED: The physiological effect of prone positioning and lateral decubitus in non-intubated patients with severe COVID-19 are similar. Accordingly, lateral decubitus can be an alternative for postural lung recruitment manoeuvres and warrants further randomized trials.
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  • 文章类型: Review
    所有真菌在生长过程中都会释放出挥发性有机化合物(VOC)的混合物。这些挥发性混合物的定性和定量组成随真菌的种类而变化,真菌的年龄,以及参与生长的环境参数。在大自然中,真菌挥发性有机化合物被发现是酒精的组合,醛类,酸,醚,酯类,酮,萜烯,硫醇及其衍生物,并负责与模具相关的特征气味,蘑菇和酵母。最常见的真菌挥发物之一是1-octen-3-ol,也称为“蘑菇醇”或“松茸醇”。\"许多挥发物,包括1-octen-3-ol,作为通讯剂,并作为发芽抑制剂显示生物活性,植物生长延缓剂或促进剂,作为与节肢动物相互作用的化学信息素(“信息化学物质”)。挥发性物质在真菌化学生命中的研究不足和认识不足。这篇综述简要介绍了真菌挥发物,希望提高人们对这些气相真菌代谢物的生理重要性的认识,以鼓励真菌学家和其他生物学家停止“丢弃”头部空间。\"
    All fungi emit mixtures of volatile organic compounds (VOCs) during growth. The qualitative and quantitative composition of these volatile mixtures vary with the species of fungus, the age of the fungus, and the environmental parameters attending growth. In nature, fungal VOCs are found as combinations of alcohols, aldehydes, acids, ethers, esters, ketones, terpenes, thiols and their derivatives, and are responsible for the characteristic odors associated with molds, mushrooms and yeasts. One of the single most common fungal volatiles is 1-octen-3-ol also known as \"mushroom alcohol\" or \"matsutake alcohol.\" Many volatiles, including 1-octen-3-ol, serve as communication agents and display biological activity as germination inhibitors, plant growth retardants or promoters, and as semiochemicals (\"infochemicals\") in interactions with arthropods. Volatiles are understudied and underappreciated elements of the chemical lives of fungi. This review gives a brief introduction to fungal volatiles in hopes of raising awareness of the physiological importance of these gas phase fungal metabolites to encourage mycologists and other biologists to stop \"throwing away the head space.\"
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  • 文章类型: Journal Article
    生物聚合物在天然和加工食品中都很普遍,作为增稠剂,乳化剂,和稳定剂。尽管已知特定的生物聚合物会影响消化,它们对加工食品中营养吸收和生物利用度的影响背后的机制尚未完全了解。这篇综述的目的是阐明生物聚合物之间的复杂相互作用及其在体内的行为,并提供对其消费可能产生的生理后果的见解。分析了生物聚合物在消化过程中的胶化过程,总结了其对营养吸收和胃肠道的影响。此外,该综述讨论了用于评估胶体化的方法,并强调需要更现实的模型来克服实际应用中的挑战。通过使用生物聚合物控制大量营养素的生物利用度,有可能增强健康益处,比如改善肠道健康,帮助控制体重,调节血糖水平。不能仅基于其固有功能来预测在现代食品结构化技术中使用的提取的生物聚合物的生理效应。至关重要的是要考虑诸如其初始消费状态以及与其他食物成分的相互作用之类的因素,以更好地了解生物聚合物的潜在健康益处。
    食品生物聚合物(FBP)在各种消化阶段对营养分布的影响不同。FBP应用程序可以帮助定制个性化饮食计划的营养价值。复杂相互作用下的FBP胶化在实际应用中带来挑战。FBP胶化的准确评估需要方法的组合。膳食FBP添加剂的益处和安全性值得在实际食品基质中进行调查。
    Biopolymers are prevalent in both natural and processed foods, serving as thickeners, emulsifiers, and stabilizers. Although specific biopolymers are known to affect digestion, the mechanisms behind their influence on the nutrient absorption and bioavailability in processed foods are not yet fully understood. The aim of this review is to elucidate the complex interplay between biopolymers and their behavior in vivo, and to provide insights into the possible physiological consequences of their consumption. The colloidization process of biopolymer in various phases of digestion was analyzed and its impact on nutrition absorption and gastrointestinal tract was summarized. Furthermore, the review discusses the methodologies used to assess colloidization and emphasizes the need for more realistic models to overcome challenges in practical applications. By controlling macronutrient bioavailability using biopolymers, it is possible to enhance health benefits, such as improving gut health, aiding in weight management, and regulating blood sugar levels. The physiological effect of extracted biopolymers utilized in modern food structuring technology cannot be predicted solely based on their inherent functionality. It is essential to account for factors such as their initial consuming state and interactions with other food components to better understand the potential health benefits of biopolymers.
    Food biopolymers (FBP) impact nutrient distribution differently in various digestion phases.FBP application can help tailor nutritional values for personalized dietary plans.FBP colloidization under complex interactions results challenges in practical applications.Accurate assessment of FBP colloidization requires combination of methodologies.Dietary FBP additives benefits and safety warrant investigation in real food matrix.
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  • 文章类型: Journal Article
    蓝藻及其毒素广泛存在于淡水生态系统中。铜绿微囊藻是主要的水华形成蓝细菌。水温是影响铜绿假单胞菌生命周期的关键因素。我们模拟了高温(4-35°C)实验并在越冬期间培养了铜绿假单胞菌,招聘和快速增长阶段。结果表明,铜绿假单胞菌在4-8°C越冬后恢复生长,并在16°C时募集。总胞外聚合物(TEPS)浓度在15°C迅速增加。在快速生长阶段,光系统II(Fv\'/Fm\')的实际量子产率在20°C达到峰值,铜绿假单胞菌生长的最适温度为20-25℃。此外,TEPS和微囊藻毒素(MC)分泌在20-25°C达到峰值。细胞密度从26°C快速积累到35°C。此外,与光合活性相关的RuBisCO和FBA的酶被证实有助于代谢,以及mcyB基因受温度升高的影响。我们的结果提供了对铜绿分枝杆菌在年度周期中的生理效应和代谢活性的见解。据预测,全球变暖可能会促进铜绿假单胞菌的早期招募,延长最佳生长期,增强毒性,最后加强铜绿假单胞菌的开花。
    Cyanobacteria and their toxins widely exist in freshwater ecosystems. Microcystis aeruginosa is among dominant bloom-forming cyanobacteria. Water temperature is a key factor influencing the life cycle of M. aeruginosa. We simulated elevated temperature (4-35 °C) experiment and cultured M. aeruginosa during the overwintering, recruitment and rapid growth phases. The results showed that M. aeruginosa recovered growth after overwintering at 4-8 °C and recruited at 16 °C. The total extracellular polymeric substance (TEPS) concentration increased rapidly at 15 °C. The actual quantum yield of photosystem II (Fv\'/Fm\') peaked at 20 °C during the rapid growth phase, and the optimum temperature of M. aeruginosa growth was 20-25 °C. Additionally, TEPS and microcystins (MCs) secretion peaked at 20-25 °C. The cell density accumulated rapidly from 26 °C to 35 °C. Furthermore, enzymes of RuBisCO and FBA related to photosynthetic activity were confirmed to contribute to the metabolism, as well as mcyB gene was affected by elevated temperature. Our results provide insights of the physiological effects and metabolic activity during annual cycle of M. aeruginosa. And it is predicted that global warming may promote the earlier recruitment of M. aeruginosa, extend the optimum growth period, enhance the toxicity, and finally intensify M. aeruginosa blooms.
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  • 文章类型: Journal Article
    接触持久性有机污染物(POPs),如有机氯(OCs)和多溴二苯醚(PBDEs),与野生动物的健康不良影响有关。许多持久性有机污染物已被禁止,因此其环境浓度下降。评估持久性有机污染物的时间趋势及其有害影响,猛禽由于其高食物网位置和高污染物水平而被广泛用作生物监测器。波罗的海生态系统中的白尾鹰(WTE;Haliaeetusalbicilla)代表了环境污染的前哨物种,因为在1960年代至1980年代期间,由于严重暴露于二氯二苯基三氯乙烷(DDT)和多氯联苯(PCB)而导致的生殖障碍,他们遭受了人口下降。然而,缺乏涵盖广泛的环境污染物及其在个体水平上的影响的长期研究。在这项研究中,我们使用了1968-2012年从瑞典繁殖的WTE对中收集的135个脱落的羽毛样本。羽毛构成了生长过程中掺入羽毛的物质的时间档案,包括皮质酮,这是主要的禽类糖皮质激素和压力相关激素。这里,我们分析了WTE羽毛池,以调查羽毛皮质酮(fCORT)的年度变化,持久性有机污染物(OCs和多溴二苯醚),和稳定的碳和氮同位素(SI;饮食代理)。我们检查了POPs的预期波动是否影响fCORT(8-94pg。mm-1)在WTE对中。尽管POP浓度有明显的时间下降趋势(p<0.01),我们发现fCORT与POPs或SIs之间无显著关联(p>0.05)。尽管研究了高度污染的人群,但我们的结果不支持fCORT作为WTE中污染物介导作用的相关生物标志物。然而,虽然没有检测到fCORT之间的关系,POP污染和饮食,fCORT代表了对野生猛禽的长期应激生理的非破坏性和回顾性评估,否则不容易获得。
    Exposure to persistent organic pollutants (POPs), such as organochlorines (OCs) and polybrominated diphenyl ethers (PBDEs), is associated with adverse health effects in wildlife. Many POPs have been banned and consequently their environmental concentrations have declined. To assess both temporal trends of POPs and their detrimental impacts, raptors are extensively used as biomonitors due to their high food web position and high contaminant levels. White-tailed eagles (WTEs; Haliaeetus albicilla) in the Baltic ecosystem represent a sentinel species of environmental pollution, as they have suffered population declines due to reproductive failure caused by severe exposure to dichlorodiphenyltrichloroethane (DDT) and polychlorinated biphenyls (PCB) during the 1960s through 1980s. However, there is a lack of long-term studies that cover a wide range of environmental contaminants and their effects at the individual level. In this study, we used 135 pooled samples of shed body feathers collected in 1968-2012 from breeding WTE pairs in Sweden. Feathers constitute a temporal archive for substances incorporated into the feather during growth, including corticosterone, which is the primary avian glucocorticoid and a stress-associated hormone. Here, we analysed the WTE feather pools to investigate annual variations in feather corticosterone (fCORT), POPs (OCs and PBDEs), and stable carbon and nitrogen isotopes (SIs; dietary proxies). We examined whether the expected fluctuations in POPs affected fCORT (8-94 pg. mm-1) in the WTE pairs. Despite clear temporal declining trends in POP concentrations (p < 0.01), we found no significant associations between fCORT and POPs or SIs (p > 0.05 in all cases). Our results do not support fCORT as a relevant biomarker of contaminant-mediated effects in WTEs despite studying a highly contaminated population. However, although not detecting a relationship between fCORT, POP contamination and diet, fCORT represents a non-destructive and retrospective assessment of long-term stress physiology in wild raptors otherwise not readily available.
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  • 文章类型: Journal Article
    由于其独特的理化性质和多样的生物学效应,超细气泡(UFBs)最近被期望用于工业和生物目的。因此,这项研究调查了水中UFBs对生物饮用水的生物安全性,以期将来在健康科学中使用。在这项研究中,我们使用H2填充的UFBs(NanoGAS®),其可以在水相中长时间保持氢。将小鼠随机分为三组:接受NanoGAS®水的小鼠,反渗透水,或者天然矿泉水,他们随意摄入一个月或三个月。因此,亚慢性饮用NanoGAS®水不会影响常见的血液生化参数或器官和粘膜的健康。我们的结果,第一次,科学证明了H2填充UFBs水用于亚慢性口服的生物安全性。
    Owing to their unique physicochemical properties and diverse biological effects, ultrafine bubbles (UFBs) have recently been expected to be utilized for industrial and biological purposes. Thus, this study investigated the biological safety of UFBs in water for living beings in drinking the water with a view to future use in health sciences. In this study, we used H2-filled UFBs (NanoGAS®) that can hold hydrogen in the aqueous phase for a long time. Mice were randomly assigned to one of three groups: those receiving NanoGAS® water, reverse osmosis water, or natural mineral water, and they ingested it ad libitum for one month or three months. As a result, subchronic drinking of NanoGAS® water does not affect either the common blood biochemical parameters or the health of the organs and mucosal membranes. Our results, for the first time, scientifically demonstrated the biological safety of H2-filled UFBs water for subchronic oral consumption.
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  • 文章类型: Journal Article
    [18F]-氟脱氧葡萄糖(FDG)正电子发射断层扫描(PET)是一种公认的模式,对肿瘤患者的诊断和分期具有很高的敏感性。FDG被细胞膜的葡萄糖转运蛋白摄取并被捕获在细胞内。除了恶性肿瘤,活动性炎性病变和某些良性肿瘤也会积聚FDG。此外,正常器官和组织的摄取程度取决于各种生理条件,受到各种医疗程序的影响,治疗,和毒品。为了避免误导性解释,重要的是要认识到模拟肿瘤病变的意外异常积聚的可能情况。在这次审查中,我们介绍了与手术或医疗程序和治疗相关的各种FDG发现.一些发现反映了对治疗的预期生理反应,和一些显示炎症由于先前的程序。偶尔,FDG-PET可显示与恶性肿瘤无关的其他疾病,这可能与患者正在服用的某些药物的不良反应有关。因此,有必要仔细检查病历和对患者的详细访谈。
    [18F]-fluorodeoxyglucose (FDG) positron emission tomography (PET) is a well-established modality with high sensitivity for the diagnosis and staging of oncologic patients. FDG is taken up by the glucose transporter of the cell membrane and becomes trapped within the cell. In addition to malignant neoplasms, active inflammatory lesions and some kinds of benign tumors also accumulate FDG. Moreover, the degree of uptake into normal organs and tissues depends on various physiological conditions, which is affected by various medical procedures, treatments, and drugs. To avoid misleading interpretations, it is important to recognize possible situations of unexpected abnormal accumulation that mimic tumor lesions. In this review, we present various FDG findings associated with surgical or medical procedures and treatments. Some findings reflect the expected physiological reaction to treatment, and some show inflammation due to prior procedures. Occasionally, FDG-PET visualizes other disorders that are unrelated to the malignancy, which may be associated with the adverse effects of certain drugs that the patient is taking. Careful review of medical records and detailed interviews of patients are thus necessary.
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  • 文章类型: Journal Article
    面包是一种常用的主食,可能是一种可行的媒介,可以提供具有健康影响的植物性成分。这篇评论汇集了有关以植物为基础的成分配制的面包的生物活性特性的已发表证据。还回顾了与食用以植物为基础的功能性成分配制的面包有关的健康影响。功能成分水果和蔬菜所证明的生物活性特性,豆类,掺入面包中的坚果和茶包括增加的酚类和多酚含量,增加抗氧化活性,并通过脂质和蛋白质氧化的损害延长面包的保质期。报告的急性健康影响包括食欲抑制,舒张压降低,改善血糖,胰岛素血症和饱腹感的影响。这些代谢作用主要是短暂的,不足以证明健康。需要对消费者和不消费者进行长期研究或比较。在面包中掺入基于植物的功能成分可以增强面包的健康促进作用。
    Bread is a commonly consumed staple and could be a viable medium to deliver plant-based ingredients that demonstrate health effects. This review brings together published evidence on the bioactive properties of bread formulated with plant-based ingredients. Health effects associated with the consumption of bread formulated with plant-based functional ingredients was also reviewed. Bioactive properties demonstrated by the functional ingredients fruits and vegetables, legumes, nuts and tea incorporated into bread include increased phenolic and polyphenolic content, increased antioxidant activity, and extension of bread shelf-life by impairment of lipid and protein oxidation. Acute health effects reported included appetite suppression, reduced diastolic blood pressure, improvements in glycaemia, insulinaemia and satiety effect. These metabolic effects are mainly short lived and not enough for a health claim. Longer term studies or comparison of those who consume and those who do not are needed. The incorporation of plant-based functional ingredients in bread could enhance the health-promoting effects of bread.
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