Toxicology

毒理学
  • 文章类型: Journal Article
    香茅醛(CIT)也被称为红衣主教,是一种天然存在的单萜醛,明显存在于Cymbopon物种的蒸馏油中。它传统上用于空气清新剂,清洁剂,地板抛光,除臭剂,除臭剂,香料成分,保湿手/身体乳液,香水,和粘合剂由于其柠檬特有的香味和治疗的好处。本研究旨在总结CIT对不同疾病的药理活性和潜在机制。以及它的毒理学特征。通过搜索不同的学术搜索引擎,从各种可靠和真实的文献中收集数据,包括PubMed,SpringerLink,Scopus,Wiley在线,WebofScience,ScienceDirect,谷歌学者。研究结果表明,CIT在各种临床前和药理实验系统中具有多种药理作用。结果表明,CIT具有抗氧化能力,抗炎,抗菌,抗真菌药,驱虫,以及在神经和心血管疾病中具有有益作用的抗癌作用。我们的发现还表明了植物化学物质的毒性水平。总之,有人提出CIT有能力作为一种有希望的治疗剂,因此,需要进一步广泛的临床研究来开发它作为一种可靠的药物。
    Citronellal (CIT) also known as rhodinal, is a naturally occurring monoterpenoid aldehyde distinctly found in the distilled oils of Cymbopogon species. It is traditionally used in air freshener, cleaner, floor polishing, deodorants, deodorizer, fragrance component, moisturizing hand/body lotion, perfumes, and adhesives due to its lemon characteristic fragrance and therapeutic benefits. This study aimed to summarize the pharmacological activities and underlying mechanisms of CIT against different diseases, as well as its toxicological profile. The data was collected from various reliable and authentic literatures by searching different academic search engines, including PubMed, Springer Link, Scopus, Wiley Online, Web of Science, ScienceDirect, and Google Scholar. The findings imply that CIT possesses several pharmacological effects in various preclinical and pharmacological experimental systems. The results indicated that CIT demonstrated antioxidant, anti-inflammatory, antibacterial, antifungal, anthelminthic, and anticancer effects with beneficial effects in neurological and cardiovascular diseases. Our findings also indicated the toxic level of the phytochemical. In conclusion, it has been proposed that CIT has the capability to serve as a hopeful therapeutic agent, so further extensive clinical research is necessary to develop it as a reliable drug.
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  • 文章类型: Journal Article
    婴儿双歧杆菌YLGB-1496,最初从台湾母亲的母乳中分离出来,正在研究用作益生菌。作为安全评估的一部分,一个艾姆斯,体内小鼠微核,并进行了为期13周的口服大鼠毒性研究,并进行了体内小鼠精母细胞染色体畸变测定。婴儿芽孢杆菌YLGB-1496在任何遗传毒性测定中都没有活性。以0至1.5g/kgbw/天的剂量向Sprague-Dawley大鼠施用细菌对所测量的任何终点都没有治疗相关的影响。基于对一般物种的广泛经验,似乎不担心婴儿双歧杆菌YLGB-1496的易位或致病性。当前研究的结果支持婴儿芽孢杆菌YLGB-1496作为婴儿配方中的益生菌的潜在用途。
    Bifidobacterium infantis YLGB-1496, originally isolated from breast milk from a Taiwanese mother, is under study for use as a probiotic. As part of safety assessment, an Ames, in vivo mouse micronucleus, and in vivo mouse spermatocyte chromosome aberration assay were conducted along with a 13-week oral rat toxicity study. B. infantis YLGB-1496 had no activity in any of the genotoxicity assays. Administration of the bacteria to Sprague-Dawley rats at doses ranging from 0 to 1.5 g/kg bw/day had no treatment-related effects on any of the endpoints measured. There appear to be no concerns for translocation or pathogenicity of B. infantis YLGB-1496 based on extensive experience with the species in general. The results of the current investigations support potential use of B. infantis YLGB-1496 as a probiotic in infant formula.
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  • 文章类型: Journal Article
    背景:地理空间方法在环境暴露评估中很常见,并且越来越多地与健康数据集成在一起,以生成环境影响对公共卫生的综合模型。
    目标:我们的目标是回顾地理空间暴露模型和环境健康应用中健康数据整合的方法。
    方法:我们进行了文献综述和综合。
    结果:首先,我们讨论地理空间暴露数据和模型的关键概念和术语。第二,我们概述了地理空间暴露模型开发和健康数据集成的工作流程。第三,我们回顾了建模方法,包括基于接近度的,统计,和机械方法,跨越不同的暴露类型,比如空气质量,水质,气候,和社会经济因素。对于每种型号,我们提供描述,一般方程,以及环境暴露评估的示例应用。第四,我们讨论了用于整合地理空间暴露数据和健康数据的方法,例如将数据源与不同的空间和时间尺度链接的方法。第五,我们描述了支持这些工作流的开源工具的前景。
    BACKGROUND: Geospatial methods are common in environmental exposure assessments and increasingly integrated with health data to generate comprehensive models of environmental impacts on public health.
    OBJECTIVE: Our objective is to review geospatial exposure models and approaches for health data integration in environmental health applications.
    METHODS: We conduct a literature review and synthesis.
    RESULTS: First, we discuss key concepts and terminology for geospatial exposure data and models. Second, we provide an overview of workflows in geospatial exposure model development and health data integration. Third, we review modeling approaches, including proximity-based, statistical, and mechanistic approaches, across diverse exposure types, such as air quality, water quality, climate, and socioeconomic factors. For each model type, we provide descriptions, general equations, and example applications for environmental exposure assessment. Fourth, we discuss the approaches used to integrate geospatial exposure data and health data, such as methods to link data sources with disparate spatial and temporal scales. Fifth, we describe the landscape of open-source tools supporting these workflows.
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  • 文章类型: Journal Article
    生物科学的进展,化学,技术,在过去的几年中,计算机科学和计算机科学导致了候选新方法方法的无与伦比的发展。其中许多在化学品的安全评估中可能是无价的,但很少有人被用于监管决策。在安全评估中立即有机会使用NAM,其愿景是能够更快地预测风险,准确地说,并有效地进一步确保消费者安全。为了实现这一点,英国食品标准局(FSA)和食品中化学物质毒性委员会,消费者产品和环境(COT)已经制定了路线图,以接受这些新方法并将其集成到安全和风险评估中,以进行监管决策。该路线图为NAM从研究实验室过渡到监管决策提供了英国蓝图。这将需要跨学科的密切合作(化学家,毒理学家,信息学家,风险评估员和其他人员),在整个化工行业,为了发展,验证和使用适当的模型。在国际上联系起来,协调将是根本。
    Advances in biosciences, chemistry, technology, and computer sciences have resulted in the unparalleled development of candidate New Approach Methodologies over the last few years. Many of these are potentially invaluable in the safety assessment of chemicals, but very few have been adopted for regulatory decision making. There is an immediate opportunity to use NAMs in safety assessment where the vision is to be able to predict risk more rapidly, accurately, and efficiently to further assure consumer safety. In order to achieve this, the UK Food Standards Agency (FSA) and the Committee on Toxicity of Chemicals in Food, Consumer Products and the Environment (COT) have developed a roadmap towards acceptance and integration of these new approach methodologies into safety and risk assessments for regulatory decision making. The roadmap provides a UK blueprint for the transition of NAMs from the research laboratory to their use in regulatory decision making. This will require close collaboration across disciplines (chemists, toxicologists, informaticians, risk assessors and others), and across chemical sectors, to develop, verify and utilise appropriate models. Linking up internationally, and harmonization will be fundamental.
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  • 文章类型: Journal Article
    除草剂暴露给爬行动物带来更高的风险,因为它们经常与土壤接触。此外,食物限制也是一种常见的环境压力,会严重影响爬行动物的生存。面对新出现的除草剂污染和粮食短缺挑战,爬行动物的适应性策略尚不清楚。因此,选择EremiasArgus(一种小型爬行动物)作为模型来模拟蜥蜴食物短缺的真实场景,旨在探讨草铵膦(GLA:一种新兴的除草剂)和食物限制对蜥蜴的综合影响。结果表明,蜥蜴常通过体热选择来调节其生理生化活动,并倾向于选择较低的体温,降低消化率,并积极参与脂肪能量动员,避免饥饿状态下的氧化损伤,最后为了达到稳态。然而,除草剂GLA扰乱了蜥蜴抵抗食物短缺压力的努力,并干扰了面临饥饿的蜥蜴的正常体温调节和能量动员策略。这项研究的结果将提高我们对蜥蜴在极端压力下的影响的理解,有助于补充爬行动物毒理学数据,为除草剂GLA的风险评估提供科学依据。
    Herbicide exposure poses a higher risk to reptiles due to their frequent contact with soil. Besides, food restriction is also a common environmental pressure that can seriously affect the survival of reptiles. The adaptive strategies of reptiles in the face of emerging herbicide pollution and food shortage challenges are not yet known. Therefore, Eremias Argus (a kind of small reptile) was selected as the model to simulate the real scenario of food shortage in lizards, aiming to explore the comprehensive impact of glufosinate-ammonium (GLA: an emerging herbicide) and food restriction on lizards. The results revealed that lizards often regulate their physiological and biochemical activities through body thermal selection and tend to choose lower body temperature, reduce digestibility, and actively participate in fat energy mobilization to avoid oxidative damage in the state of hunger, finally in order to achieve homeostasis. However, herbicide GLA disrupted the lizards\' efforts to resist the stress of food shortage and interfered with the normal thermoregulation and energy mobilization strategies of lizards facing starvation. The results of this study would improve our understanding of the impacts of Lizards under extreme stresses, help supplement reptile toxicology data and provide scientific basis for the risk assessment of herbicide GLA.
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  • 文章类型: Journal Article
    当前的真实世界分析旨在评估和描述在诊断为肝硬化的住院患者中使用γ-羟基丁酸(GHB)治疗酒精戒断综合征(AWS)。使用佛罗伦萨(意大利)Careggi大学医院医学毒理学部门的数据,对肝硬化和酒精使用障碍(AUD)患者进行了为期11年的观察性回顾性研究。进行了多变量逻辑回归以估计住院期间患有aCIWA-ArMax3-4的概率,AWS长度>36小时,住院>9天,以及发展为困倦的可能性。共纳入166名AUD患者,其中77人接受了GHB(70.13%在住院的第一天内),89人没有接受GHB治疗.大多数为≥40岁(87.35%)和男性(80.12%)。GHB患者在住院期间更有可能出现aCIWA-ArMax3-4(OR3.76[CI95%1.02-13.85]),住院时间较长(OR3.08[95%CI1.23-7.71])。早期GHB给药降低了CIWA-ArMax恶化的概率(OR=0.06[95%CI0.01-0.49])。GHB剂量≥100mg/kg与嗜睡的发生无关。暴露于其他镇静剂的患者更容易出现嗜睡(OR7.22[95%CI1.46-35.61])。目前的现实世界分析强调,GHB可能是一个有价值的和安全的选择AWS在AUD患者的影响肝硬化,也在早期给药,甚至高于推荐剂量。
    The present real-world analysis aimed to evaluate and describe the use of gamma-hydroxybutyric acid (GHB) for alcohol withdrawal syndrome (AWS) in hospitalized patients with diagnosis of liver cirrhosis. An 11-year observational retrospective study on patients affected by liver cirrhosis and alcohol use disorder (AUD) was performed using data from the Medical Toxicology Unit of Careggi University Hospital in Florence (Italy). A multivariate logistic regression was performed to estimate the probability of having a CIWA-Ar Max 3-4 during hospitalization, an AWS length  > 36 h, a hospitalization > 9 days, and the probability of developing drowsiness. A total of 166 AUD patients were included, of these 77 received GHB (70.13% within the first day of hospitalization) and 89 were treated without GHB. The majority were  ≥ 40 years of age (87.35%) and males (80.12%). GHB patients were more likely to have a CIWA-Ar Max 3-4 during hospitalization (OR 3.76 [CI 95% 1.02-13.85]), and a longer hospitalization (OR 3.08 [95% CI 1.23-7.71]). Early GHB administration decreased the probability of CIWA-Ar Max worsening (OR 0.06 [95% CI 0.01-0.49]). GHB dose  ≥ 100 mg/kg was not associated with the occurrence of drowsiness. Patients exposed to other sedative agents were more likely to experience drowsiness (OR 7.22 [95% CI 1.46-35.61]). The present real-world analysis underlines that GHB could be a valuable and safe option for the management of AWS in AUD patients affected by liver cirrhosis, also when administered early and even at higher than recommended dosages.
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  • 文章类型: Journal Article
    巨翅目幼虫是重要的生物指示物种和潜在的资源昆虫。进一步培养他们的经济作用,必须更详细地检查他们的生活环境。在这项研究中,我们分析了亚致死剂量的吡虫啉的生理和生化效应,一种广泛使用的新烟碱杀虫剂,在原虫黄体的幼虫上。用吡虫啉治疗后,P.xanthodes幼虫表现出明显的中毒症状,包括头部向腹面蜷缩。此外,接触后,乙酰胆碱酯酶的活性受到显着抑制。谷胱甘肽S-转移酶的活性最初持续增加,但在8天后表现出轻微下降。过氧化氢酶活性最初增加,然后在吡虫啉处理后下降;超氧化物歧化酶活性随时间波动,过氧化物酶活性连续增加。使用qRT-PCR评估HSP70s基因的表达水平。这些结果表明,黄原虫幼虫对吡虫啉暴露表现出毒性反应,表现为氧化应激,通过行为和生理指标观察。
    Megaloptera larvae are important bioindicator species and potential resource insects. To further cultivate their economic role, their living environment must be examined in more detail. In this study, we analyzed the physiological and biochemical effects of a sublethal dose of imidacloprid, a widely used neonicotinoid insecticide, on the larvae of Protohermes xanthodes. After treatment with imidacloprid, P. xanthodes larvae exhibited clear symptoms of poisoning, including the head curling up toward the ventral surface. Additionally, the activity of acetylcholinesterase was significantly inhibited following exposure. The activities of glutathione S-transferases initially continuously increased but showed a slight decrease after 8 days. Catalase activity initially increased and then decreased following imidacloprid treatment; superoxide dismutase activity fluctuated over time, and peroxidase activity continuously increased. The expression levels of HSP70s genes were evaluated using qRT-PCR. These results indicate that P. xanthodes larvae exhibit a toxic response to imidacloprid exposure, manifested as oxidative stress, as observed through behavioral and physiological indicators.
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  • 文章类型: Journal Article
    癌症预防目前被设想为一种基于分子的方法,以预防癌前阶段的致癌作用。即,发育不良和原位癌。癌症是全球第二大死亡原因,预计到2040年将增长61%以上。癌症进展途径的详细探索,包括NF-kβ信号通路,Wnt-B连环蛋白信号通路,JAK-STAT途径,TNF-α介导的途径,MAPK/mTOR通路,以及参与癌症发展的凋亡和血管生成途径和效应分子,已经在手稿中讨论过了。通过使用植物分子的分子方法对这些效应分子的关键评估可以与癌症形成及其转移相交。操纵效应分子,如NF-kβ,SOCS,β-连环蛋白,巴克斯,BAK,VEGF,STAT,Bcl2,p53,caspases,CDKs在抑制肿瘤生长及其扩散方面发挥了重要作用。在过去的几十年中,从天然来源获得的植物来源的次生代谢物因其预防癌症的潜力而被广泛研究。丁香酚,茴香脑,辣椒素,血根碱,EGCG,6-姜辣素,和白藜芦醇是这种有趣的先导分子的一些例子,并在手稿中提到。这项工作试图提出一种全面的方法来理解癌症进展途径及其使用效应草药分子的管理。还强调了不同植物代谢物及其慢性毒性谱在调节癌症发展途径中的作用。
    Cancer prevention is currently envisioned as a molecular-based approach to prevent carcinogenesis in pre-cancerous stages, i.e., dysplasia and carcinoma in situ. Cancer is the second-leading cause of mortality worldwide, and a more than 61% increase is expected by 2040. A detailed exploration of cancer progression pathways, including the NF-kβ signaling pathway, Wnt-B catenin signaling pathway, JAK-STAT pathway, TNF-α-mediated pathway, MAPK/mTOR pathway, and apoptotic and angiogenic pathways and effector molecules involved in cancer development, has been discussed in the manuscript. Critical evaluation of these effector molecules through molecular approaches using phytomolecules can intersect cancer formation and its metastasis. Manipulation of effector molecules like NF-kβ, SOCS, β-catenin, BAX, BAK, VEGF, STAT, Bcl2, p53, caspases, and CDKs has played an important role in inhibiting tumor growth and its spread. Plant-derived secondary metabolites obtained from natural sources have been extensively studied for their cancer-preventing potential in the last few decades. Eugenol, anethole, capsaicin, sanguinarine, EGCG, 6-gingerol, and resveratrol are some examples of such interesting lead molecules and are mentioned in the manuscript. This work is an attempt to put forward a comprehensive approach to understanding cancer progression pathways and their management using effector herbal molecules. The role of different plant metabolites and their chronic toxicity profiling in modulating cancer development pathways has also been highlighted.
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  • 文章类型: Journal Article
    背景:山豆根(STR),山豆根的干燥根和根茎。,通常用于治疗扁桃体炎和咽炎,喉咙疼痛和喉咙阻塞,牙龈肿胀和疼痛,等。在中国或其他亚洲国家。STR通常用作中药制剂中的核心草药,如“鼻咽灵片”,“复方无印良品颗粒”和“肝延灵注射液”,等。综述目的:本综述旨在从植物学角度对STR进行全面分析,传统使用,植物化学,民族药理学,药理学,药代动力学,毒理学和解毒策略,为今后的研究提供合理的应用。
    方法:研究涉及的信息来自各种电子资源,包括中国国家知识基础设施(CNKI),SciFinder,谷歌学者,PubMed,WebofScience,和中国硕士和博士学位论文。
    结果:到现在为止,STR中总共鉴定出333种化学成分,包括85种生物碱,124类黄酮,24个三萜,27三萜皂苷,34有机酸,8多糖,等。STR及其主要活性成分具有心血管保护作用,抗肿瘤活性,抗炎活性,解热活性,镇痛活性,抗菌活性,抗真菌活性,抗病毒活性,和肝保护活性,等。然而,STR对肝脏的毒性作用,神经,心,和胃肠道也被观察到。为了减轻这些风险,STR在使用前需要衰减,最常见的解毒方法是加工和与其他药物联合使用。对STR在体内的药代动力学以及含有STR的传统和临床处方进行了梳理。尽管STR具有潜在的治疗益处,进一步的研究是必要的,以阐明其肝脏毒性,特别是在体内,探索体内代谢等方面,分布,和机制。
    结论:这篇综述强调了STR的治疗潜力,并强调了在考虑临床应用之前解决其毒性问题的迫切需要。需要进一步研究以全面调查STR的毒理学特性,特别强调它的肝毒性和神经毒性。这样的研究努力有可能标准化STR的合理应用以获得最佳治疗结果。
    BACKGROUND: Sophorae tonkinensis Radix et Rhizoma (STR), the dried root and rhizome of Sophora tonkinensis Gagnep., is commonly used in the treatment of tonsillitis and pharyngitis, throat soreness and throat obstruction, swelling and aching of gum, etc. in China or other Asian countries. STR is usually used as the core herb in traditional Chinese medicine preparations, such as \"Biyanling Tablets\", \"Fufang Muji Granules\" and \"Ganyanling Injections\", etc. AIM OF THE REVIEW: This review aimed to provide a comprehensive analysis of STR in terms of botany, traditional use, phytochemistry, ethnopharmacology, pharmacology, pharmacokinetics, toxicology and detoxification strategy, to provide a rational application in future research.
    METHODS: The information involved in the study was gathered from a variety of electronic resources, including China National Knowledge Infrastructure (CNKI), SciFinder, Google Scholar, PubMed, Web of Science, and Chinese Masters and Doctoral Dissertations.
    RESULTS: Till now, a total of 333 chemical components have been identified in STR, including 85 alkaloids, 124 flavonoids, 24 triterpenes, 27 triterpene saponins, 34 organic acids, 8 polysaccharides, etc. STR and its main active constituents have cardiovascular protection, anti-tumor activity, anti-inflammatory activity, antipyretic activity, analgesic activity, antibacterial activity, antifungal activity, antiviral activity, and hepatoprotective activity, etc. However, toxic effects of STR on the liver, nerves, heart, and gastrointestinal tract have also been observed. To mitigate these risks, STR needs attenuation before use, with the most common detoxification methods being processing and combined use with other drugs. The pharmacokinetics of STR in vivo and traditional and clinical prescriptions containing STR have been sorted out. Despite the potential therapeutic benefits of STR, further research is warranted to elucidate its hepatotoxicity, particularly in vivo, exploring aspects such as in vivo metabolism, distribution, and mechanisms.
    CONCLUSIONS: This review serves to emphasize the therapeutic potential of STR and highlights the crucial need to address its toxicity concerns before considering clinical application. Further research is required to comprehensively investigate the toxicological properties of STR, with particular emphasis on its hepatotoxicity and neurotoxicity. Such research endeavors have the potential to standardize the rational application of STR for optimal therapeutic outcomes.
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  • 文章类型: Journal Article
    近年来,许多治疗肽已在欧盟市场获得授权,和其他一些正在临床开发阶段或正在评估完整的档案或通用应用。特定于肽的质量和安全指南是有限的,有些方面需要考虑。特别是,关注与杂质的分析调查和这些物质的毒理学评估有关。指南和药典提供了某些参考,但如果根据治疗肽是否被视为化学或生物实体来解释,这可能是有问题的。大或小。肽相关杂质的表征不能遵循小分子方法,但应考虑与这些大分子可在人体中发挥的复杂作用机制密切相关的方面。尽管不能排除直接的遗传毒性机制,不能排除生物系统上的危险相互作用,例如天然肽毒素及其与细胞或膜靶标的特异性相互作用。从监管的角度来看,只有在特定的风险识别和表征之后,才应定义与潜在毒性相关的同样特定的安全阈值。
    In recent years, a number of therapeutic peptides have been authorized in the EU market, and several others are in the clinical development phase or under assessment for full dossier or generic applications. Quality and safety guidelines specific to peptides are limited, and some aspects have to be considered. In particular, concerns relate to the analytical investigation for impurities and the toxicological assessment of these substances. The guidelines and the compendial pharmacopoeias provide certain references but that may be questionable if interpreted according to whether therapeutic peptides are considered chemical or biological entities, large or small. The characterization of peptide-related impurities cannot follow the small molecule approach but should consider aspects closely linked to the complex mechanisms of action that these large molecules can exert in the human body. Although direct genotoxic mechanisms cannot be excluded, hazardous interactions on biological systems cannot be ruled out, as in the case of natural peptide toxins and their specific interactions with cellular or membrane targets. From a regulatory perspective, only after specific risk identification and characterisation should an equally specific safety threshold in relation to potential toxicity be defined.
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