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Integrated High-Throughput Centrifugal Microfluidic Chip Device for Pathogen Detection On-Site. 用于现场病原体检测的集成式高通量离心微流控芯片设备。
IF 4.9 3区 工程技术 Q1 CHEMISTRY, ANALYTICAL Pub Date : 2024-06-19 DOI: 10.3390/bios14060313
Shuyu Lu, Yuanzhan Yang, Siqi Cui, Anyi Li, Cheng Qian, Xiaoqiong Li

An integrated and high-throughput device for pathogen detection is crucial in point-of-care testing (POCT), especially for early diagnosis of infectious diseases and preventing the spread of infection. We developed an on-site testing platform that utilizes a centrifugal microfluidic chip and automated device to achieve high-throughput detection. The low-power (<32 W), portable (220 mm × 220 mm × 170 mm, 4 kg) device can complete bacterial lysis, nucleic acid extraction and purification, loop-mediated isothermal amplification (LAMP) reaction, and real-time fluorescence detection. Magnetic beads for nucleic acid adsorption can be mixed by applying electromagnetic fields and centrifugal forces, and the efficiency of nucleic acid extraction is improved by 60% compared to the no-mixing group. The automated nucleic acid extraction process achieves equivalent nucleic acid extraction efficiency in only 40% of the time consumed using the kit protocol. By designing the valve system and disc layout, the maximum speed required for the centrifugal microfluidic chip is reduced to 1500 rpm, greatly reducing the equipment power consumption and size. In detecting E. coli, our platform achieves a limit of detection (LOD) of 102 CFU/mL in 60 min. In summary, our active centrifugal microfluidic platform provides a solution for the integration of complex biological assays on turntables, with great potential in the application of point-of-care diagnosis.

用于病原体检测的集成式高通量设备对于床旁检测(POCT)至关重要,尤其是对于传染病的早期诊断和防止感染传播。我们开发了一种现场检测平台,利用离心微流控芯片和自动化设备实现高通量检测。我们的低功耗(大肠杆菌)平台可在 60 分钟内达到 102 CFU/mL 的检测限(LOD)。总之,我们的主动离心微流控平台为在转台上集成复杂的生物检测提供了解决方案,在应用于医疗点诊断方面具有巨大潜力。
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引用次数: 0
Development of a Portable Cell-Based Biosensor for the Ultra-Rapid Screening for Boscalid Residues in Lettuce. 开发一种基于细胞的便携式生物传感器,用于超快速筛查生菜中的 Boscalid 残留。
IF 4.9 3区 工程技术 Q1 CHEMISTRY, ANALYTICAL Pub Date : 2024-06-18 DOI: 10.3390/bios14060311
Georgia Moschopoulou, Vasileios Tsekouras, Josep V Mercader, Antonio Abad-Fuentes, Spyridon Kintzios

Fungal plant pathogens have posed a significant threat to crop production. However, the large-scale application of pesticides is associated with possible risks for human health and the environment. Boscalid is a widely used fungicide, consistently implemented for the management of significant plant pathogens. Conventionally, the detection and determination of boscalid residues is based on chromatographic separations. In the present study, a Bioelectric Recognition Assay (BERA)-based experimental approach combined with MIME technology was used, where changes in the electric properties of the membrane-engineering cells with anti-boscalid antibodies were recorded in response to the presence of boscalid at different concentrations based on the maximum residue level (MRL) for lettuce. The membrane-engineering Vero cells with 0.5 μg/mL of antibody in their surface were selected as the best cell line in combination with the lowest antibody concentration. Furthermore, the biosensor was tested against another fungicide in order to prove its selectivity. Finally, the BERA cell-based biosensor was able to detect the boscalid residue, below and above the MRL, in spiked lettuce leaf extracts in an entirely distinct and reproducible manner. This study indicates that the BERA-based biosensor, after further development and optimization, could be used for the routine, high-throughput detection of boscalid residue in lettuce, and not only that.

植物真菌病原体对作物生产构成了重大威胁。然而,大规模使用杀虫剂可能会对人类健康和环境造成危害。啶虫脒是一种广泛使用的杀真菌剂,一直被用于控制重要的植物病原体。传统的方法是通过色谱分离来检测和确定啶虫脒的残留量。本研究采用了基于生物电识别分析(BERA)的实验方法,并结合 MIME 技术,根据莴苣的最高残留限量(MRL),记录了含有抗硼砂抗体的膜工程细胞在不同浓度硼砂存在时的电特性变化。结果表明,表面含有 0.5 μg/mL 抗体的膜工程 Vero 细胞是结合最低抗体浓度的最佳细胞系。此外,该生物传感器还针对另一种杀真菌剂进行了测试,以证明其选择性。最后,基于 BERA 细胞的生物传感器能够以完全不同和可重复的方式检测出莴苣叶提取物中低于和高于最高残留限量的啶酰菌胺残留量。这项研究表明,基于 BERA 细胞的生物传感器在经过进一步开发和优化后,不仅可用于常规、高通量检测莴苣中的硼沙利度残留,还可用于检测莴苣中的硼沙利度残留。
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引用次数: 0
Bismuth Film along with dsDNA-Modified Electrode Surfaces as Promising (bio)Sensors in the Analysis of Heavy Metals in Soils. 铋膜和dsDNA修饰电极表面是分析土壤中重金属的理想(生物)传感器。
IF 4.9 3区 工程技术 Q1 CHEMISTRY, ANALYTICAL Pub Date : 2024-06-18 DOI: 10.3390/bios14060310
Vasiliki Keramari, Sotiria G Papadimou, Evangelia E Golia, Stella Girousi

Heavy metals constitute pollutants that are particularly common in air, water, and soil. They are present in both urban and rural environments, on land, and in marine ecosystems, where they cause serious environmental problems since they do not degrade easily, remain almost unchanged for long periods, and bioaccumulate. The detection and especially the quantification of metals require a systematic process. Regular monitoring is necessary because of seasonal variations in metal levels. Consequently, there is a significant need for rapid and low-cost metal determination methods. In this study, we compare and analytically validate absorption spectrometry with a sensitive voltammetric method, which uses a bismuth film-plated electrode surface and applies stripping voltammetry. Atomic absorption spectroscopy (AAS) represents a well-established analytical technique, while the applicability of anodic stripping voltammetry (ASV) in complicated sample matrices such as soil samples is currently unknown. This sample-handling challenge is investigated in the present study. The results show that the AAS and ASV methods were satisfactorily correlated and showed that the metal concentration in soils was lower than the limit values but with an increasing trend. Therefore, continuous monitoring of metal levels in the urban complex of a city is necessary and a matter of great importance. The limits of detection of cadmium (Cd) were lower when using the stripping voltammetry (SWASV) graphite furnace technique compared with those obtained with AAS when using the graphite furnace. However, when using flame atomic absorption spectroscopy (flame-AAS), the measurements tended to overestimate the concentration of Cd compared with the values found using SWASV. This highlights the differences in sensitivity and accuracy between these analytical methods for detecting Cd. The SWASV method has the advantage of being cheaper and faster, enabling the simultaneous determination of heavy elements across the range of concentrations that these elements can occur in Mediterranean soils. Additionally, a dsDNA biosensor is suggested for the discrimination of Cu(I) along with Cu(II) based on the oxidation peak of guanine, and adenine residues can be applied in the redox speciation analysis of copper in soil, which represents an issue of great importance.

重金属是空气、水和土壤中特别常见的污染物。它们存在于城市和农村环境、陆地和海洋生态系统中,由于不易降解、长期保持几乎不变以及生物累积,因此造成了严重的环境问题。金属的检测,特别是定量需要一个系统的过程。由于金属含量存在季节性变化,因此有必要进行定期监测。因此,亟需快速、低成本的金属测定方法。在本研究中,我们将吸收光谱法与灵敏的伏安法进行了比较和分析验证,后者使用镀铋膜电极表面,并采用剥离伏安法。原子吸收光谱法(AAS)是一种成熟的分析技术,而阳极剥离伏安法(ASV)在复杂样品基质(如土壤样品)中的适用性目前尚不清楚。本研究对这一样品处理难题进行了调查。结果表明,AAS 和 ASV 方法的相关性令人满意,并表明土壤中的金属浓度低于限值,但呈上升趋势。因此,对城市综合体中的金属含量进行连续监测是必要的,也是非常重要的。使用剥离伏安法(SWASV)石墨炉技术时,镉(Cd)的检测限比使用原子吸收光谱法(AAS)时的检测限低。然而,在使用火焰原子吸收光谱法(flame-AAS)时,与使用剥离伏安法(SWASV)得出的值相比,测量结果往往会高估镉的浓度。这凸显了这两种镉检测分析方法在灵敏度和准确性上的差异。SWASV 方法的优点是成本更低,速度更快,可以同时测定地中海土壤中可能存在的各种重金属浓度。此外,根据鸟嘌呤的氧化峰,建议使用 dsDNA 生物传感器来区分铜(I)和铜(II),腺嘌呤残基可用于土壤中铜的氧化还原标样分析,这是一个非常重要的问题。
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引用次数: 0
Photoelectric Multi-Signal Output Sensor Based on Two-Dimensional Covalent Organic Polymer Film Modified by Novel Aggregation-Induced Emission Probes. 基于新型聚集诱导发射探针修饰的二维共价有机聚合物薄膜的光电多信号输出传感器。
IF 4.9 3区 工程技术 Q1 CHEMISTRY, ANALYTICAL Pub Date : 2024-06-18 DOI: 10.3390/bios14060312
Yaru Song, Guoling Wu, Enbing Zhang, Guangyuan Feng, Shengbin Lei, Lingli Wu

Optical sensors, especially fluorescence sensors, have been widely used because of their advantages in sensing, such as the high sensitivity, good selectivity, no radiation source, and easy operation. Here, we report an example of fluorescence sensing based on two-dimensional (2D) covalent organic polymers and highlight that the material can achieve a fast response and multi-signal output. This 2DPTPAK+TAPB-based sensor can quickly detect aromatic hydrocarbons and Fe3+ by the fluorescence signal or electrical resistance signal.

光学传感器,尤其是荧光传感器,因其灵敏度高、选择性好、无辐射源、操作简便等传感优势而得到广泛应用。在此,我们报告了一个基于二维(2D)共价有机聚合物的荧光传感实例,并强调了该材料可实现快速响应和多信号输出。这种基于 2DPTPAK+TAPB 的传感器可以通过荧光信号或电阻信号快速检测芳香烃和 Fe3+。
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引用次数: 0
Challenges and Advances in Biomarker Detection for Rapid and Accurate Sepsis Diagnosis: An Electrochemical Approach. 用于快速准确诊断败血症的生物标记物检测的挑战与进展:电化学方法。
IF 4.9 3区 工程技术 Q1 CHEMISTRY, ANALYTICAL Pub Date : 2024-06-17 DOI: 10.3390/bios14060309
Deivasigamani Ranjith Kumar, Angelika Banaś, Katarzyna Krukiewicz

Sepsis is a life-threatening condition with high mortality rates due to delayed treatment of patients. The conventional methodology for blood diagnosis takes several hours, which suspends treatment, limits early drug administration, and affects the patient's recovery. Thus, rapid, accurate, bedside (onsite), economical, and reliable sepsis biomarker reading of the clinical sample is an emergent need for patient lifesaving. Electrochemical label-free biosensors are specific and rapid devices that are able to perform analysis at the patient's bedside; thus, they are considered an attractive methodology in a clinical setting. To reveal their full diagnostic potential, electrode architecture strategies of fabrication are highly desirable, particularly those able to preserve specific antibody-antigen attraction, restrict non-specific adsorption, and exhibit high sensitivity with a low detection limit for a target biomarker. The aim of this review is to provide state-of-the-art methodologies allowing the fabrication of ultrasensitive and highly selective electrochemical sensors for sepsis biomarkers. This review focuses on different methods of label-free biomarker sensors and discusses their advantages and disadvantages. Then, it highlights effective ways of avoiding false results and the role of molecular labels and functionalization. Recent literature on electrode materials and antibody grafting strategies is discussed, and the most efficient methodology for overcoming the non-specific attraction issues is listed. Finally, we discuss the existing electrode architecture for specific biomarker readers and promising tactics for achieving quick and low detection limits for sepsis biomarkers.

败血症是一种危及生命的疾病,由于延误治疗,患者死亡率很高。传统的血液诊断方法需要几个小时,这就中止了治疗,限制了早期用药,影响了病人的康复。因此,对临床样本进行快速、准确、床旁(现场)、经济、可靠的败血症生物标志物读取是挽救病人生命的迫切需要。电化学无标记生物传感器是一种特异而快速的设备,能够在病人床旁进行分析,因此被认为是临床环境中一种有吸引力的方法。为了充分发挥其诊断潜力,电极结构的制造策略非常重要,尤其是那些能够保持特异性抗体抗原吸引力、限制非特异性吸附、对目标生物标记物具有高灵敏度和低检测限的电极结构。本综述旨在提供最先进的方法,以制造超灵敏、高选择性的脓毒症生物标志物电化学传感器。本综述重点介绍了无标记生物标记传感器的不同方法,并讨论了它们的优缺点。然后,重点介绍避免错误结果的有效方法以及分子标签和功能化的作用。本文讨论了电极材料和抗体接枝策略方面的最新文献,并列举了克服非特异性吸引问题的最有效方法。最后,我们讨论了用于特定生物标志物读取器的现有电极结构,以及实现脓毒症生物标志物快速、低检测限的可行策略。
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引用次数: 0
Design and Application of Microfluidic Capture Device for Physical-Magnetic Isolation of MCF-7 Circulating Tumor Cells. 用于 MCF-7 循环肿瘤细胞物理磁分离的微流控捕获装置的设计与应用
IF 4.9 3区 工程技术 Q1 CHEMISTRY, ANALYTICAL Pub Date : 2024-06-15 DOI: 10.3390/bios14060308
Akhilesh Bendre, Derangula Somasekhara, Varalakshmi K Nadumane, Ganesan Sriram, Ramesh S Bilimagga, Mahaveer D Kurkuri

Circulating tumor cells (CTCs) are a type of cancer cell that spreads from the main tumor to the bloodstream, and they are often the most important among the various entities that can be isolated from the blood. For the diagnosis of cancer, conventional biopsies are often invasive and unreliable, whereas a liquid biopsy, which isolates the affected item from blood or lymph fluid, is a less invasive and effective diagnostic technique. Microfluidic technologies offer a suitable channel for conducting liquid biopsies, and this technology is utilized to extract CTCs in a microfluidic chip by physical and bio-affinity-based techniques. This effort uses functionalized magnetic nanoparticles (MNPs) in a unique microfluidic chip to collect CTCs using a hybrid (physical and bio-affinity-based/guided magnetic) capturing approach with a high capture rate. Accordingly, folic acid-functionalized Fe3O4 nanoparticles have been used to capture MCF-7 (breast cancer) CTCs with capture efficiencies reaching up to 95% at a 10 µL/min flow rate. Moreover, studies have been conducted to support this claim, including simulation and biomimetic investigations.

循环肿瘤细胞(CTCs)是一种从主要肿瘤扩散到血液中的癌细胞,它们往往是从血液中分离出来的各种实体中最重要的一种。在癌症诊断中,传统的活组织检查往往具有创伤性且不可靠,而从血液或淋巴液中分离出受影响项目的液体活组织检查则是一种创伤性较小且有效的诊断技术。微流控技术为进行液体活检提供了一个合适的渠道,利用这种技术,可以通过物理和生物亲和技术在微流控芯片中提取 CTC。这项研究在独特的微流体芯片中使用功能化磁性纳米粒子(MNPs),通过混合(物理和生物亲和性/导向磁性)捕获方法收集 CTC,捕获率很高。因此,叶酸功能化的 Fe3O4 纳米粒子已被用于捕获 MCF-7(乳腺癌)CTC,在 10 µL/min 的流速下捕获效率高达 95%。此外,还进行了包括模拟和生物仿真调查在内的研究来支持这一说法。
{"title":"Design and Application of Microfluidic Capture Device for Physical-Magnetic Isolation of MCF-7 Circulating Tumor Cells.","authors":"Akhilesh Bendre, Derangula Somasekhara, Varalakshmi K Nadumane, Ganesan Sriram, Ramesh S Bilimagga, Mahaveer D Kurkuri","doi":"10.3390/bios14060308","DOIUrl":"10.3390/bios14060308","url":null,"abstract":"<p><p>Circulating tumor cells (CTCs) are a type of cancer cell that spreads from the main tumor to the bloodstream, and they are often the most important among the various entities that can be isolated from the blood. For the diagnosis of cancer, conventional biopsies are often invasive and unreliable, whereas a liquid biopsy, which isolates the affected item from blood or lymph fluid, is a less invasive and effective diagnostic technique. Microfluidic technologies offer a suitable channel for conducting liquid biopsies, and this technology is utilized to extract CTCs in a microfluidic chip by physical and bio-affinity-based techniques. This effort uses functionalized magnetic nanoparticles (MNPs) in a unique microfluidic chip to collect CTCs using a hybrid (physical and bio-affinity-based/guided magnetic) capturing approach with a high capture rate. Accordingly, folic acid-functionalized Fe<sub>3</sub>O<sub>4</sub> nanoparticles have been used to capture MCF-7 (breast cancer) CTCs with capture efficiencies reaching up to 95% at a 10 µL/min flow rate. Moreover, studies have been conducted to support this claim, including simulation and biomimetic investigations.</p>","PeriodicalId":48608,"journal":{"name":"Biosensors-Basel","volume":"14 6","pages":""},"PeriodicalIF":4.9,"publicationDate":"2024-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11201624/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141451943","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhancing Sensitivity in SARS-CoV-2 Rapid Antigen Testing through Integration of a Water-Soluble Polymer Wall. 通过整合水溶性聚合物壁提高 SARS-CoV-2 快速抗原检测的灵敏度
IF 4.9 3区 工程技术 Q1 CHEMISTRY, ANALYTICAL Pub Date : 2024-06-12 DOI: 10.3390/bios14060305
Xiuzhen Wang, Yu Wang, Huiyang Jie, Sidi Liu, Chenguang Shen, Qian Liu

Lateral flow immunoassays (LFIAs) are recognized for their practicality in homecare and point-of-care testing, owing to their simplicity, cost-efficiency, and rapid visual readouts. Despite these advantages, LFIAs typically fall short in sensitivity, particularly in detecting viruses such as SARS-CoV-2, thus limiting their broader application. In response to this challenge, we have innovated an approach to substantially enhance LFIA sensitivity. This involves the integration of a water-soluble dextran-methacrylate polymer wall with a 15% grafting degree positioned between the test and control lines on the LFIA strip. This novel modification significantly improved the sensitivity of the assay, achieving detection limits as low as 50 pg mL-1 and enhancing the sensitivity by 5-20-fold relative to existing LFIA kits available on the market. Furthermore, our developed LFIA kit (WSPW-LFIA) demonstrated exceptional specificity for SARS-CoV-2. Coupled with a straightforward fabrication process and robust stability, the WSPW-LFIA represents a promising advancement for real-time in vitro diagnosis across a spectrum of diseases.

侧流免疫分析法(LFIAs)因其简便、经济、快速的视觉读数而被公认为是家庭护理和护理点检测的实用方法。尽管具有这些优点,但 LFIA 的灵敏度通常较低,尤其是在检测 SARS-CoV-2 等病毒方面,因此限制了其更广泛的应用。为了应对这一挑战,我们创新了一种方法来大幅提高 LFIA 的灵敏度。这包括在 LFIA 试纸条的检测线和对照线之间加入接枝度为 15% 的水溶性葡聚糖-甲基丙烯酸酯聚合物壁。这种新颖的改良大大提高了检测灵敏度,检测限低至 50 pg mL-1,与市场上现有的 LFIA 试剂盒相比,灵敏度提高了 5-20 倍。此外,我们开发的 LFIA 试剂盒(WSPW-LFIA)对 SARS-CoV-2 具有极高的特异性。WSPW-LFIA 的制造工艺简单,稳定性强,是用于各种疾病的实时体外诊断的一大进步。
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引用次数: 0
Development of a DNA-Based Lateral Flow Strip Membrane Assay for Rapid Screening and Genotyping of Six High-Incidence STD Pathogens. 开发基于 DNA 的侧流带膜测定法,用于快速筛查六种高发性病病原体并进行基因分型。
IF 5.4 3区 工程技术 Q1 CHEMISTRY, ANALYTICAL Pub Date : 2024-05-20 DOI: 10.3390/bios14050260
Gunho Choi, Keum-Soo Song, Satish Balasaheb Nimse, Taisun Kim

Sexually transmitted diseases (STDs) are a global concern because approximately 1 million new cases emerge daily. Most STDs are curable, but if left untreated, they can cause severe long-term health implications, including infertility and even death. Therefore, a test enabling rapid and accurate screening and genotyping of STD pathogens is highly awaited. Herein, we present the development of the DNA-based 6STD Genotyping 9G Membrane test, a lateral flow strip membrane assay, for the detection and genotyping of six STD pathogens, including Trichomonas vaginalis, Ureaplasma urealyticum, Neisseria gonorrhoeae, Chlamydia trachomatis, Mycoplasma hominis, and Mycoplasma genitalium. Here, we developed a multiplex PCR primer set that allows PCR amplification of genomic materials for these six STD pathogens. We also developed the six ssDNA probes that allow highly efficient detection of the six STD pathogens. The 6STD Genotyping 9G Membrane test lets us obtain the final detection and genotyping results in less than 30 m after PCR at 25 °C. The accuracy of the 6STD Genotyping 9G membrane test in STD genotyping was confirmed by its 100% concordance with the sequencing results of 120 clinical samples. Therefore, the 6STD Genotyping 9G Membrane test emerges as a promising diagnostic tool for precise STD genotyping, facilitating informed decision-making in clinical practice.

性传播疾病(STD)是一个全球关注的问题,因为每天大约有 100 万新病例出现。大多数性传播疾病是可以治愈的,但如果不及时治疗,就会对健康造成严重的长期影响,包括不育甚至死亡。因此,人们非常期待一种能快速准确筛查性病病原体并进行基因分型的检测方法。在此,我们介绍了基于 DNA 的 6STD 基因分型 9G 膜检测试剂盒的开发情况,这是一种侧流条带膜检测试剂盒,用于检测和基因分型六种性传播疾病病原体,包括阴道毛滴虫、尿解脲原体、淋病奈瑟菌、沙眼衣原体、人型支原体和生殖器支原体。在此,我们开发了一套多重 PCR 引物,可对这六种性传播疾病病原体的基因组材料进行 PCR 扩增。我们还开发了六种 ssDNA 探针,可高效检测这六种性病病原体。6STD Genotyping 9G Membrane 检测试剂盒可让我们在 25 °C 下进行 PCR 扩增后,在不到 30 米的时间内获得最终的检测和基因分型结果。6STD 基因分型 9G 膜检验法与 120 份临床样本的测序结果 100%吻合,这证实了它在性病基因分型方面的准确性。因此,6STD 基因分型 9G 膜检验是一种很有前途的诊断工具,可用于精确的性传播疾病基因分型,有助于临床实践中的知情决策。
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引用次数: 0
Portable Infrared-Based Glucometer Reinforced with Fuzzy Logic. 基于模糊逻辑的便携式红外血糖仪。
IF 5.4 3区 工程技术 Q1 CHEMISTRY, ANALYTICAL Pub Date : 2023-11-20 DOI: 10.3390/bios13110991
Hasan Mhd Nazha, Mhd Ayham Darwich, Ebrahim Ismaiel, Anas Shahen, Tamim Nasser, Maher Assaad, Daniel Juhre

Diabetes mellitus (DM) is a chronic metabolic condition characterized by high blood glucose levels owing to decreased insulin production or sensitivity. Current diagnostic approaches for gestational diabetes entail intrusive blood tests, which are painful and impractical for regular monitoring. Additionally, typical blood glucose monitoring systems are restricted in their measurement frequency and need finger pricks for blood samples. This research study focuses on the development of a non-invasive, real-time glucose monitoring method based on the detection of glucose in human tears and finger blood using mid-infrared (IR) spectroscopy. The proposed solution combines a fuzzy logic-based calibration mechanism with an IR sensor and Arduino controller. This calibration technique increases the accuracy of non-invasive glucose testing based on MID absorbance in fingertips and human tears. The data demonstrate that our device has high accuracy and reliability, with an error rate of less than 3%, according to the EGA. Out of 360 measurements, 97.5% fell into zone A, 2.2% into zone B, and 0.3% into zone C of the Clarke Error Grid. This suggests that our device can give clinically precise and acceptable estimates of blood glucose levels without inflicting any harm or discomfort on the user.

糖尿病(DM)是一种慢性代谢疾病,其特征是由于胰岛素产生或敏感性降低而导致血糖水平升高。目前对妊娠期糖尿病的诊断方法需要进行侵入性血液检查,这种检查既痛苦又不现实,无法进行常规监测。此外,典型的血糖监测系统在测量频率上受到限制,并且需要手指穿刺采集血液样本。本研究的重点是开发一种基于中红外(IR)光谱检测人体眼泪和手指血液中葡萄糖的无创、实时血糖监测方法。提出的解决方案将基于模糊逻辑的校准机制与红外传感器和Arduino控制器相结合。该校准技术提高了基于指尖和人眼泪MID吸光度的无创血糖检测的准确性。根据EGA的数据,我们的设备具有很高的准确性和可靠性,错误率低于3%。在360次测量中,97.5%落入克拉克误差网格的A区,2.2%落入B区,0.3%落入C区。这表明,我们的设备可以提供临床精确和可接受的血糖水平估计,而不会对用户造成任何伤害或不适。
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引用次数: 0
Recent Research Progress in Fluorescent Probes for Detection of Amyloid-β In Vivo. 体内淀粉样蛋白-β荧光探针的研究进展
IF 5.4 3区 工程技术 Q1 CHEMISTRY, ANALYTICAL Pub Date : 2023-11-19 DOI: 10.3390/bios13110990
Zhen-Yu Zhang, Ze-Jun Li, Ying-Hao Tang, Liang Xu, De-Teng Zhang, Tian-Yi Qin, Ya-Long Wang

Alzheimer's disease (AD) is a neurodegenerative disease. Due to its complex pathological mechanism, its etiology is not yet clear. As one of the main pathological markers of AD, amyloid-β (Aβ) plays an important role in the development of AD. The deposition of Aβ is not only related to the degeneration of neurons, but also can activate a series of pathological events, including the activation of astrocytes and microglia, the breakdown of the blood-brain barrier, and the change in microcirculation, which is the main cause of brain lesions and death in AD patients. Therefore, the development of efficient and reliable Aβ-specific probes is crucial for the early diagnosis and treatment of AD. This paper focuses on reviewing the application of small-molecule fluorescent probes in Aβ imaging in vivo in recent years. These probes efficiently map the presence of Aβ in vivo, providing a pathway for the early diagnosis of AD and providing enlightenment for the design of Aβ-specific probes in the future.

阿尔茨海默病(AD)是一种神经退行性疾病。由于其病理机制复杂,病因尚不清楚。淀粉样蛋白-β (Aβ)是AD的主要病理标志物之一,在AD的发生发展中起着重要作用。a β的沉积不仅与神经元的退行性变有关,还可激活星形胶质细胞和小胶质细胞的活化、血脑屏障的破坏、微循环的改变等一系列病理事件,是AD患者脑病变和死亡的主要原因。因此,开发高效可靠的a β特异性探针对于AD的早期诊断和治疗至关重要。本文重点综述了近年来小分子荧光探针在体内Aβ成像中的应用。这些探针有效地定位了a β在体内的存在,为AD的早期诊断提供了途径,并为未来a β特异性探针的设计提供了启示。
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引用次数: 0
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