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Nanozymes in point-of-care diagnosis:An Emerging Futuristic Approach for Biosensing

Nano-Micro Letters 2021年第12期13卷 44-94页

作者： Bhaskar Das Javier Lou Franco Natasha Logan Paramasivan Balasubramanian Moon Il Kim Cuong Cao School of Biological Sciences Queen’s University BelfastBelfastUK Department of Biotechnology and Medical Engineering National Institute of Technology RourkelaRourkelaIndia Department of BioNano Technology Gachon UniversitySeongnamKorea

Nanomaterial-based artificial enzymes(or nanozymes) have attracted great attention in the past few years owing to their capability not only to mimic functionality but also to overcome the inherent drawbacks of the natural *** advantages of nanozymes such as diverse enzyme-mimicking activities,low cost,high stability,robustness,unique surface chemistry,and ease of surface tunability and biocompatibility have allowed their integration in a wide range of biosensing applications. Several metal,metal oxide,metal–organic framework-based nanozymes have been exploited for the development of biosensing systems,which present the potential for point-of-care analysis. To highlight recent progress in the field,in this review,more than 260 research articles are discussed systematically with suitable recent examples,elucidating the role of nanozymes to reinforce,miniaturize,and improve the performance of point-of-care diagnostics addressing the ASSURED(a ordable,sensitive,specific,user-friendly,rapid and robust,equipment-free and deliverable to the end user) criteria formulated by World Health Organization. The review reveals that many biosensing strategies such as electrochemical,colorimetric,fluorescent,and immunological sensors required to achieve the ASSURED standards can be implemented by using enzyme-mimicking activities of nanomaterials as signal producing components. However,basic system functionality is still lacking. Since the enzyme-mimicking properties of the nanomaterials are dictated by their size,shape,composition,surface charge,surface chemistry as well as external parameters such as pH or temperature,these factors play a crucial role in the design and function of nanozyme-based point-of-care diagnostics. Therefore,it requires a deliberate exertion to integrate various parameters for truly ASSURED solutions to be realized. This review also discusses possible limitations and research gaps to provide readers a brief scenario of the emerging role of nanoz

关键词： Nanozymes Biosensing point-of-care diagnosis ASSURED diagnostics Catalytic nanomaterials

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Scalable fabrication of graphene-assembled multifunctional electrode with efficient electrochemical detection of dopamine and glucose

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Nano Research 2023年第5期16卷 6361-6368页

作者： Xiaodong Ji Xin Zhao Zixin Zhang Yunfa Si Wei Qian Huaqiang Fu Zibo Chen Zhe Wang Huihui Jin Zhugen Yang Daping He State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China Hubei Engineering Research Center of RF-Microwave Technology and Application Wuhan University of TechnologyWuhan 430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China School of Information Engineering Wuhan University of TechnologyWuhan 430070China School of Water Energy and EnvironmentCranfield UniversityMilton KeynesMK430ALUK

Conventional glassy carbon electrodes(GCE)cannot meet the requirements of future electrodes for wider use due to low conductivity,high cost,non-portability,lack of ***,cost-effective and wearable electrode enabling rapid and versatile molecule detection is becoming important,especially with the ever-increasing demand for health monitoring and point-ofcare *** is considered as an ideal electrode due to its excellent physicochemical ***,we prepare graphene film with ultra-high conductivity and customize the 3-electrode system via a facile and highly controllable laser engraving *** from the ultra-high conductivity(5.65×10^(5)S·m^(−1)),the 3-electrode system can be used as multifunctional electrode for direct detection of dopamine(DA)and enzyme-based detection of glucose without further metal *** dynamic ranges from 1–200μM to 0.5–8.0 mM were observed for DA and glucose,respectively,with a limit of detection(LOD)of 0.6μM and 0.41 ***,the excellent target detection capability caused by the ultra-high conductivity and ease modification of graphene films,together with their superb mechanical properties and ease of mass-produced,provides clear potential not only for replacing GCE for various electrochemical studies but also for the development of portable and highperformance electrochemical wearable medical devices.

关键词： graphene film ultra-high conductivity multifunctional electrode point-of-care diagnosis wearable medical devices

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Detection of SARS-CoV-2 and Its Mutated Variants Using RT-LAMP-CRISPR-Cas12a Platform

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Wuhan University Journal of Natural Sciences 2024年第5期29卷 453-460页

作者： WANG Shanshan YAN Jun DU Tongtong LIU Luo CHEN Xiong HAN Song YIN Jun PENG Biwen HE Xiaohua LU Xuan LIU Wanhong Hubei Province Key Laboratory of Allergy and Immunology Taikang Medical School(School of Basic Medical Sciences)Wuhan UniversityWuhan 430071HubeiChina Department of Laboratory Medicine Wuhan Children's HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430016HubeiChina Beijing Bioprocess Key Laboratory Beijing University of Chemical TechnologyBeijing 100029China Key Laboratory of Environmental Pollution Monitoring and Disease Control(Guizhou Medical University) Ministry of EducationGuiyang 550025GuizhouChina

The global outbreak of coronavirus disease 19(COVID-19),caused by severe acute respiratory syndrome coronavirus 2(SARS-Co V-2),has raised significant global *** a rapid,efficient,sensitive,and accurate point-of-care detection method is imperative for curbing SARS-Co V-2 ***,we screened a sequence,designed a set of highly sensitive loopmediated isothermal amplification primers(LAMP)and g RNA,and developed a user-friendly detection platform combining CRISPRCas12a and RT-LAMP technology to specifically detect SARS-Co V-2 and its 5 *** analysis and Cas12a-g RNA identification ensured sequence specificity,allowing us to identify SARS-Co V-2 *** developed a method for the detection of SARSCoV-2 using these primers in combination with LAMP amplification and CRISPR-Cas12a *** method is designed to detect SARS-CoV-2(NC_045512),Alpha(B.1.1.7),Beta(B.1.351),Gamma(P.1),Delta(B.1.617.2)and Omicron(B.1.1.529).Additionally,it can differentiate SARS-CoV-2 from other *** analysis can be conducted by measuring fluorescence values,while qualitative analysis can be performed by observing fluorescence color point-of-care diagnosis changes with the naked *** results suggest that a set of novel sensitive LAMP primers and g RNA have been obtained to detect the extensive variants,and the RT-LAMPCRISPR-Cas12a platform significantly facilitates point-of-care diagnosis,thereby halting the spread of SARS-Co V-2,thus contributing to COVID-19 prevention and control.

关键词： SARS-CoV-2 mutation CRISPR RT-LAMP point-of-care diagnosis

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