nanoparticles

纳米粒子
  • 文章类型: Systematic Review
    近年来,由于高死亡率和令人沮丧的五年生存率,治疗非小细胞肺癌(NSCLC)的重要性日益增加。免疫检查点抑制剂(ICI)是一种有前途的方法,由于细胞的抗原性,在NSCLC中具有出色的结果。相反,ICI对免疫系统的过度刺激是一把双刃剑,可导致从轻度到危及生命的各种负面影响。这篇综述探讨了基于纳米粒子的ICI的当前突破及其局限性。PubMed,检查了Scopus和WebofScience的相关出版物。分析中包括38项试验(N=16,781)。量化治疗效果的混合效果分析对ICI治疗效果研究中的亚组做出了显着贡献。模型证实,与常规治疗方案相比,ICI对治疗效果的影响更大,且降低了受访者的死亡率。由于ICI已被证明的有效性和安全性,ICI可能被用作一线治疗。
    Treating non-small-cell lung cancer (NSCLC) has gained increased importance in recent years due to the high mortality rate and dismal five-year survival rate. Immune checkpoint inhibitors (ICI) are a promising approach with exceptional outcomes in NSCLC thanks to the antigenic nature of cells. Conversely, immune system over-stimulation with ICI is a double-edged sword that can lead to various negative effects ranging from mild to life-threatening. This review explores current breakthroughs in nanoparticle-based ICI and their limitations. The PubMed, Scopus and Web of Science were examined for relevant publications. Thirty-eight trials (N = 16,781) were included in the analyses. The mixed effects analyses on quantifying the treatment effect contributed significantly to the subgroups within studies for ICI treatment effect. Models confirmed ICI\'s higher impact on treatment effectivity and the decrease in respondents\' mortality compared to conventional treatment regiments. ICI might be used as first-line therapy due to their proven effectiveness and safety profile.
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  • 文章类型: Journal Article
    池沸腾在许多工业制造应用中是必不可少的。此外,在通过新的或传统的发电应用提高能源发电效率和实现到2050年实现净零碳排放目标的过程中,它可能变得至关重要。沸腾的有效性受气泡循环的支配。被加热表面的化学性质和地形特征已被发现高度影响沸腾性能。例如在通过纳米/微加热器表面改性采用亲水性和疏水性表面时的池沸腾增强的情况下。然而,由于制造和维护成本以及复杂性,为大规模应用创建这些表面的可行性如何值得怀疑。当前的工作评估了在传统冷却剂中使用纳米颗粒是否可以通过元数据文献综述分析来潜在地解锁优化加热表面改性的批量生产。已发现,由于纳米颗粒在经历池沸腾的冷却剂中沉积而产生的自组装层似乎表现得与制造的亲水性表面最相似。通过使用冷却剂中不同纳米颗粒悬浮液的组合,可以产生增强的图案化传热表面。
    Pool boiling is essential in many industrial manufacturing applications. In addition, it can become critical in the journey towards improving energy generation efficiency and accomplishing the goal of net-zero carbon emissions by 2050 via new or traditional power generation applications. The effectiveness of boiling is governed by the bubble cycle. The chemistry and topographical features of the surface being heated have been found to highly impact the boiling performance, such as in the case of pool boiling enhancement when employing hydrophilic and hydrophobic surfaces via nano/micro heater surface modification. Nevertheless, it is questionable how feasible it is to create these surfaces for large-scale applications due to their manufacturing and maintenance cost and complexity. The current work assesses whether the use of nanoparticles in traditional coolants could potentially unlock the mass production of optimised heating surface modification through a metadata literature review analysis. It was discovered that self-assembled layers created as a result of the deposition of nanoparticles in coolants undergoing pool boiling seem to behave most similarly to manufactured hydrophilic surfaces. The creation of enhanced patterned-heat transfer surfaces is shown to be possible via the use of a combination of different nanoparticle suspensions in coolants.
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  • 文章类型: Journal Article
    皮肤癌是白人中最常见的癌症,根据世界卫生组织。黑色素瘤和非黑色素瘤皮肤癌的发病率已经上升到流行水平,使它们成为最普遍的皮肤癌。黑色素瘤是一种非常侵袭性的癌症,由于多药耐药性和极低的患者生存概率,其特点是治疗选择有限。本文探讨了与常规治疗相关的各种障碍和局限性。化疗,辐射,免疫疗法,靶向治疗是黑色素瘤的常规治疗方法之一;然而,这些方法中的每一种都有几种不良反应。最近,一直专注于开发替代品的生物学和药理学研究,特定部位的治疗方法。纳米技术在这方面提供了几个好处,有可能延长黑色素瘤患者的寿命,同时最大限度地减少不良反应。纳米粒子作为有效的药物载体系统,由于它们的能力,以提高低水溶性药物的溶解度,修改药代动力学,通过降低免疫原性延长药物半衰期,提高生物利用度,减少药物代谢。本文重点介绍了利用几种纳米技术技术的最新进展,包括固体脂质纳米粒,纳米结构脂质载体,脂质体,转移体,乙醇体,和纳米乳液聚合混合胶束。
    Skin cancer is the most common type of cancer among white people, according to the World Health Organisation. The incidence of melanoma and non-melanoma skin cancers has increased to epidemic levels, making them the most widespread type of skin cancer. Melanoma is a very aggressive form of cancer, characterized by limited treatment choices due to multidrug resistance and an extremely low probability of patient survival. This article explores the various impediments and limitations associated with conventionally available treatments. Chemotherapy, radiation, immunotherapy, and targeted therapy are among the conventional treatments for melanoma; however, each of these approaches has several adverse reactions. Recently, there has been a focus on biological and pharmacological research on developing alternative, site-specific therapy approaches. Nanotechnology offers several benefits in this regard, with the potential to enhance the longevity of melanoma patients while minimizing adverse effects. Nanoparticles serve as effective drug carrier systems due to their capacity to improve the solubility of medications with low water solubility, modify pharmacokinetics, prolong drug half-life by reducing immunogenicity, boost bioavailability, and decrease drug metabolism. This article highlights recent advancements in utilizing several nanotechnological techniques, including solid lipid nanoparticles, nanostructured lipid carriers, liposomes, transferosomes, ethosomes, and nanoemulsion polymeric mixed micelles.
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  • 文章类型: Journal Article
    纳米技术已经成为一个有前途的领域,有可能彻底改变农业,特别是在增强植物防御机制方面。纳米粒子(NPs)在植物防御启动中发挥着重要作用,植物预先暴露于受控的压力水平,以提高其警觉性和对随后的压力源的反应能力。该过程通过实现对次级刺激的更快和更有效的响应来改善整体植物性能。这篇综述探讨了NP作为引发剂的应用,利用其独特的物理化学性质来支持植物的先天防御机制。它讨论了基于NP的植物防御启动的关键发现,包括各种NP类型,如金属,金属氧化物,和碳基NP。该综述还调查了NP与植物相互作用的复杂机制,包括摄取,易位,以及它们对植物生理的影响,形态学,和分子过程。此外,这篇综述研究了NP如何增强植物对一系列压力源的反应,从病原体攻击和食草动物侵扰到环境压力。它还讨论了NPs提高植物对干旱等非生物胁迫的耐受性的能力,盐度,和重金属。农业中NP使用的安全和监管方面得到了彻底解决,强调负责任和道德的环境和人类健康安全部署。通过利用NP的潜力,这种方法在减少作物损失方面显示出希望,提高产量,加强全球粮食安全,同时尽量减少传统农业做法对环境的影响。综述最后强调了正在进行的研究对优化NP配方的重要性,剂量,以及在不同农业环境中实际应用的交付方法。
    Nanotechnology has emerged as a promising field with the potential to revolutionize agriculture, particularly in enhancing plant defense mechanisms. Nanoparticles (NPs) are instrumental in plant defense priming, where plants are pre-exposed to controlled levels of stress to heighten their alertness and responsiveness to subsequent stressors. This process improves overall plant performance by enabling quicker and more effective responses to secondary stimuli. This review explores the application of NPs as priming agents, utilizing their unique physicochemical properties to bolster plants\' innate defense mechanisms. It discusses key findings in NP-based plant defense priming, including various NP types such as metallic, metal oxide, and carbon-based NPs. The review also investigates the intricate mechanisms by which NPs interact with plants, including uptake, translocation, and their effects on plant physiology, morphology, and molecular processes. Additionally, the review examines how NPs can enhance plant responses to a range of stressors, from pathogen attacks and herbivore infestations to environmental stresses. It also discusses NPs\' ability to improve plants\' tolerance to abiotic stresses like drought, salinity, and heavy metals. Safety and regulatory aspects of NP use in agriculture are thoroughly addressed, emphasizing responsible and ethical deployment for environmental and human health safety. By harnessing the potential of NPs, this approach shows promise in reducing crop losses, increasing yields, and enhancing global food security while minimizing the environmental impact of traditional agricultural practices. The review concludes by emphasizing the importance of ongoing research to optimize NP formulations, dosages, and delivery methods for practical application in diverse agricultural settings.
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  • 文章类型: Journal Article
    纳米技术通过引入有效递送药物的创新方法,显著改变了癌症治疗。这篇文献综述深入分析了纳米载体在癌症治疗中的作用。特别关注隐身效应的关键概念。隐形效应是指纳米载体逃避免疫系统和克服生理障碍的能力。该评论调查了各种纳米载体的设计和组成,如脂质体,胶束,和无机纳米粒子,强调表面改性和功能化的重要性。免疫系统之间复杂的相互作用,调理,吞噬作用,并检查了蛋白质电晕以了解隐形效应。审查仔细评估了增强隐身效果的策略,包括聚合物表面涂层,仿生伪装,和靶向配体。隐形纳米载体的体内行为及其对药代动力学的影响,生物分布,和毒性也进行了系统检查。此外,这篇综述介绍了临床应用,批准的基于纳米载体的癌症治疗的案例研究,和临床试验中的新兴配方。该领域的未来方向和障碍,例如纳米载体工程的进步,个性化纳米医学,监管方面的考虑,和道德含义,进行了详细讨论。该综述总结了主要发现,并强调了隐形纳米载体在彻底改变癌症治疗方面的变革潜力。这篇综述通过提供对先进研究的见解,增强了对基于纳米载体的癌症疗法及其潜在影响的理解。临床应用,和监管方面的考虑。
    Nanotechnology has significantly transformed cancer treatment by introducing innovative methods for delivering drugs effectively. This literature review provided an in-depth analysis of the role of nanocarriers in cancer therapy, with a particular focus on the critical concept of the \'stealth effect.\' The stealth effect refers to the ability of nanocarriers to evade the immune system and overcome physiological barriers. The review investigated the design and composition of various nanocarriers, such as liposomes, micelles, and inorganic nanoparticles, highlighting the importance of surface modifications and functionalization. The complex interaction between the immune system, opsonization, phagocytosis, and the protein corona was examined to understand the stealth effect. The review carefully evaluated strategies to enhance the stealth effect, including surface coating with polymers, biomimetic camouflage, and targeting ligands. The in vivo behavior of stealth nanocarriers and their impact on pharmacokinetics, biodistribution, and toxicity were also systematically examined. Additionally, the review presented clinical applications, case studies of approved nanocarrier-based cancer therapies, and emerging formulations in clinical trials. Future directions and obstacles in the field, such as advancements in nanocarrier engineering, personalized nanomedicine, regulatory considerations, and ethical implications, were discussed in detail. The review concluded by summarizing key findings and emphasizing the transformative potential of stealth nanocarriers in revolutionizing cancer therapy. This review enhanced the comprehension of nanocarrier-based cancer therapies and their potential impact by providing insights into advanced studies, clinical applications, and regulatory considerations.
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  • 文章类型: Journal Article
    介孔二氧化硅纳米粒子(MSNs)由于其独特的介观结构特征(高比表面积,大孔隙体积,和可调的孔隙结构),易于改性的表面,高载药量,和持续释放配置文件。然而,MSN在健康组织中的持久和非特异性富集可能由于其降解缓慢而导致毒性并阻碍其临床应用。可降解MSN的出现为这一问题提供了解决方案。了解调节这些MSN的降解和清除以促进临床试验和扩大其生物学应用的策略至关重要。这里,各种各样的可降解MSN关于物理化学性质和降解掺杂策略的考虑,MSN在体内的生物分布,内部间隙机构,重点介绍了间隙物理参数的调整。最后,概述了这些可降解和可明确的MSN生物安全战略,并展望了所遇到的挑战。
    Mesoporous silica nanoparticles (MSNs) have attracted extensive attention as drug delivery systems because of their unique meso-structural features (high specific surface area, large pore volume, and tunable pore structure), easily modified surface, high drug-loading capacity, and sustained-release profiles. However, the enduring and non-specific enrichment of MSNs in healthy tissues may lead to toxicity due to their slow degradability and hinder their clinical application. The emergence of degradable MSNs provided a solution to this problem. The understanding of strategies to regulate degradation and clearance of these MSNs for promoting clinical trials and expanding their biological applications is essential. Here, a diverse variety of degradable MSNs regarding considerations of physiochemical properties and doping strategies of degradation, the biodistribution of MSNs in vivo, internal clearance mechanism, and adjusting physical parameters of clearance are highlighted. Finally, an overview of these degradable and clearable MSNs strategies for biosafety is provided along with an outlook of the encountered challenges.
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  • 文章类型: Journal Article
    牙髓和根尖周病是生物膜诱导的感染。了解牙髓生物膜的复杂性将有助于创建新的消毒策略,以消除根管系统中的微生物。复杂的运河结构为适当的消毒带来了挑战,需要了解生物膜结构,composition,和生物膜群落内的机制。本文介绍了牙髓生物膜的结构,生物膜的形成,和先进的治疗选择,以对抗根管系统内的生物膜社区。
    Pulpal and periapical pathosis are biofilm-induced infections. Understanding the complex nature of endodontic biofilm would help to create a new disinfection strategy to eliminate the microorganism from the root canal system. The intricate canal structure creates challenges for proper disinfection, necessitating the need to understand the biofilm structure, composition, and mechanism within the biofilm community. This paper describes the endodontic biofilm structure, formation of biofilm, and advanced therapeutic options for combating the biofilm community within the root canal system.
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  • 文章类型: Journal Article
    背景:阿尔茨海默病(AD)是痴呆症的最常见形式,预计将来会大大增加,使其成为全球重大健康问题,对个人和社会产生严重影响。尽管近几十年来在了解阿尔茨海默病(AD)的细胞和分子方面取得了进展,这仍然是一个重大问题。一个主要问题是准确地将药物输送到患病的神经元,同时最大限度地减少对健康神经元的影响。抗阿尔茨海默病药物的低水溶性和阻碍高亲脂性中枢神经系统药物进入的血脑屏障(BBB)使这一困难恶化。
    目的:本文的重点是基于脂质的纳米载体。这是更广泛接受的治疗阿尔茨海默病的方法之一,因为它增加治疗功效,同时减少与合作神经障碍有效载荷相关的副作用。
    方法:在许多数据库中搜索了以标题发表的论文(包括PubMed,Elsevier,和谷歌学者)。
    结论:纳米脂质载体(NLC)由于其爱脂特性和与活组织的相容性而被认为具有有效靶向大脑的能力。它们改善了药物在大脑中的吸收,同时减少了药物在非预期器官中的积累。这项工作强调了纳米脂质载体的重要性,它们是亲脂性和生物相容性的,并且已经证明了卓越的靶向效率,使它们成为向大脑输送药物的理想载体系统。
    BACKGROUND: Alzheimer\'s disease (AD) is the most common form of dementia and is expected to greatly rise in future, making it a major worldwide health concern with severe impacts on individuals and society. Despite advancements in understanding the cellular and molecular aspects of Alzheimer\'s disease (AD) in recent decades, it still poses a significant problem. A major problem is accurately delivering drugs to diseased neurons while minimising effects on healthy neurons. This difficulty is worsened by the low water solubility of anti-Alzheimer\'s disease medicines and the blood-brain barrier (BBB) that hinders the entry of central nervous system pharmaceuticals that are highly lipophilic.
    OBJECTIVE: The focus of this article is on nanocarriers that are lipid-based. This is one of the more widely accepted methods of treating Alzheimer\'s disease, as it increases therapeutic efficacy while decreasing side effects related to cooperated neurological disorder payload.
    METHODS: Searched many databases for papers published under the title (including PubMed, Elsevier, and Google Scholar).
    CONCLUSIONS: Nano Lipid Carriers (NLCs) are recognized for their ability to target the brain effectively due to their lipid-loving properties and compatibility with living tissues. They improve the absorption of drugs in the brain while decreasing the accumulation of drugs in unintended organs. This work emphasises the importance of nano lipid carriers, which are lipophilic and biocompatible and have demonstrated exceptional targeting efficiency, making them an ideal carrier system for delivering medications to the brain.
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  • 文章类型: Journal Article
    本研究遵循PRISMA报告指南来呈现结果。对PubMed等电子数据库进行了全面搜索,Scopus,WebofSciences,科学直接。最初,检索到413篇文章。删除重复项并应用特定的纳入和排除标准后,本系统综述最终纳入10篇文章。
    综述的研究表明,硒纳米颗粒具有抗炎和抗氧化特性。它们有效地保护了肾脏,肝脏,和睾丸受损。此外,有证据表明所检查的器官具有有效的放射防护作用,没有明显的副作用。
    本系统综述强调了使用硒纳米颗粒防止电离辐射的负面影响的潜在优势。重要的是,这些保护作用是在没有引起明显副作用的情况下实现的。这些发现表明硒纳米颗粒作为辐射防护剂的潜在作用,提供可能的治疗应用,以减少医学影像和放射治疗程序中与电离辐射暴露相关的风险。
    UNASSIGNED: This study followed the PRISMA reporting guidelines to present the results. A comprehensive search was performed on electronic databases such as PubMed, Scopus, Web of Sciences, and Science Direct. Initially, 413 articles were retrieved. After removing duplicates and applying specific inclusion and exclusion criteria, 10 articles were finally included in this systematic review.
    UNASSIGNED: The reviewed studies showed that selenium nanoparticles had anti-inflammatory and antioxidant properties. They effectively protected the kidneys, liver, and testicles from damage. Furthermore, there was evidence of efficient radioprotection for the organs examined without significant side effects.
    UNASSIGNED: This systematic review emphasizes the potential advantages of using selenium nanoparticles to prevent the negative effects of ionizing radiation. Importantly, these protective effects were achieved without causing noticeable side effects. These findings suggest the potential role of selenium nanoparticles as radioprotective agents, offering possible therapeutic applications to reduce the risks related to ionizing radiation exposure in medical imaging and radiotherapy procedures.
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  • 文章类型: Journal Article
    由于细菌病原体及其毒素引起的食源性疾病暴发已成为全球公共卫生和安全的严重关切。寻找具有针对当前腐败和食源性细菌病原体的独特作用机制的新型抗菌剂是克服抗生素抗性的中心策略。这项研究检查了无机纳米颗粒(NPs)对食源性细菌病原体的抗菌活性和作用机理。用英语写的文章是从寄存器和数据库中恢复的(PubMed,ScienceDirect,WebofScience,谷歌学者,和开放存取期刊目录)和其他来源(网站,组织,和引文搜索)。\"纳米粒子,\"\"无机纳米粒子,\"\"金属纳米颗粒,\"\"金属氧化物纳米颗粒,\“\”抗菌活性,\"\"抗菌活性,\"\"食源性细菌病原体,“\”行动机制,“”和“食源性疾病”是用于检索文章的搜索词。PRISMA-2020清单适用于文章搜索策略,文章选择,数据提取,和审查过程的结果报告。从不同的搜索策略获得的3,575篇文章中,共包括27篇原始研究文章。所有研究都证明了无机NPs的抗菌效果,并强调了它们对食源性细菌病原体的不同作用机制。在本研究中,小尺寸,球形,工程,封顶,与水的低溶解,高浓度NP,在革兰氏阴性细菌类型中,与它们的对应物相比具有很高的抗菌活性。细胞壁相互作用和膜渗透,活性氧的产生,DNA损伤,和蛋白质合成抑制是当前研究中公认的一些广义机制。因此,这项研究建议在食品加工行业中正确使用无毒的无机纳米颗粒产品,以确保食品的质量和安全,同时最大限度地减少食源性细菌病原体对抗生素的耐药性。
    Foodborne disease outbreaks due to bacterial pathogens and their toxins have become a serious concern for global public health and security. Finding novel antibacterial agents with unique mechanisms of action against the current spoilage and foodborne bacterial pathogens is a central strategy to overcome antibiotic resistance. This study examined the antibacterial activities and mechanisms of action of inorganic nanoparticles (NPs) against foodborne bacterial pathogens. The articles written in English were recovered from registers and databases (PubMed, ScienceDirect, Web of Science, Google Scholar, and Directory of Open Access Journals) and other sources (websites, organizations, and citation searching). \"Nanoparticles,\" \"Inorganic Nanoparticles,\" \"Metal Nanoparticles,\" \"Metal-Oxide Nanoparticles,\" \"Antimicrobial Activity,\" \"Antibacterial Activity,\" \"Foodborne Bacterial Pathogens,\" \"Mechanisms of Action,\" and \"Foodborne Diseases\" were the search terms used to retrieve the articles. The PRISMA-2020 checklist was applied for the article search strategy, article selection, data extraction, and result reporting for the review process. A total of 27 original research articles were included from a total of 3,575 articles obtained from the different search strategies. All studies demonstrated the antibacterial effectiveness of inorganic NPs and highlighted their different mechanisms of action against foodborne bacterial pathogens. In the present study, small-sized, spherical-shaped, engineered, capped, low-dissolution with water, high-concentration NPs, and in Gram-negative bacterial types had high antibacterial activity as compared to their counterparts. Cell wall interaction and membrane penetration, reactive oxygen species production, DNA damage, and protein synthesis inhibition were some of the generalized mechanisms recognized in the current study. Therefore, this study recommends the proper use of nontoxic inorganic nanoparticle products for food processing industries to ensure the quality and safety of food while minimizing antibiotic resistance among foodborne bacterial pathogens.
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