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Guo Z, Wang X, Sun HL. A sensitive Ag +-mediated magnetic relaxation and colorimetry dual-mode sensing platform. Talanta 2024; 276:126188. [PMID: 38739955 DOI: 10.1016/j.talanta.2024.126188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Revised: 04/16/2024] [Accepted: 04/28/2024] [Indexed: 05/16/2024]
Abstract
To address the relatively low sensitivity of current redox reagent-mediated magnetic relaxation sensing methods, we present a novel Ag+-mediated magnetic sensing platform that enhances the sensitivity by three orders of magnitude. The new sensing platform is based on Ag+-catalyzed oxidation of Mn2+ to KMnO4, accompanied by a distinct color change, which facilitates colorimetric detection. In the case of insufficient Ag+ ions, MnO2 is an additional oxidation product and the KMnO4/MnO2 ratio is dependent on the concentration of Ag+. When combined with a specific quantity of reducing agent, both KMnO4 and MnO2 are reduced to Mn2+ with a large relaxivity, and the concentration of Mn2+ in the resultant solution inversely correlates with the amount of KMnO4 since KMnO4 consumes more reductant during reduction. Consequently, the transverse relaxation rate of the solution exhibits a negative correlation with the Ag+ concentration. Thus, by coupling this Ag+-mediated Mn2+ to KMnO4 transformation with reactions that modulate Ag+ concentration, a dual-mode sensing platform for magnetic relaxation and colorimetry can be realized. Herein, we take H2O2 as an example to verify the detection performance of this sensing platform since H2O2 can oxidize Ag0 in Ag@Fe3O4 nanoparticles to Ag+. Experimental findings demonstrate detection limits of 10 nM and 20 nM for the magnetic relaxation and colorimetry modes, respectively, affirming the excellent sensitivity and the potential practical application of this strategy.
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Affiliation(s)
- Zhuangzhuang Guo
- Department of Chemistry and Beijing Key Laboratory of Energy Conversion and Storage Materials, Beijing Normal University, Beijing, 100875, PR China
| | - Xin Wang
- Department of Chemistry and Beijing Key Laboratory of Energy Conversion and Storage Materials, Beijing Normal University, Beijing, 100875, PR China
| | - Hao-Ling Sun
- Department of Chemistry and Beijing Key Laboratory of Energy Conversion and Storage Materials, Beijing Normal University, Beijing, 100875, PR China.
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Yu N, Ma G, Chen Y, Huang S, Gong Y, Li S, Gu H, You H, Miao P. MnO 2 nanosheets and gold nanoparticles supported electrochemical detection of circulating tumor cells. Colloids Surf B Biointerfaces 2023; 229:113482. [PMID: 37523806 DOI: 10.1016/j.colsurfb.2023.113482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 07/15/2023] [Accepted: 07/27/2023] [Indexed: 08/02/2023]
Abstract
The concentration of circulating tumor cells (CTCs) in peripheral blood is strongly correlated with the progress of certain metastatic cancers. In this study, we have developed a novel and facile electrochemical biosensor for the detection of CTCs based on the use of manganese dioxide nanosheets (MnO2 NSs) and gold nanoparticles (AuNPs). Aptamer sequence of target cell is modified on the surface of AuNPs for specifical recognition. With low-speed centrifugation, numerous AuNPs@DNA can be removed from the supernatant. On the other hand, MnO2 NSs are modified on the electrode surface to capture unreacted AuNPs@DNA. The declined electrochemical signal intensity can be used to reflect the level of CTCs. This biosensor achieves a wide linear range from 10 to 104 cells mL-1 and a limit of detection as low as 3 cells mL-1. Due to the specific aptamer as the recognition element, interfering cells can be successfully distinguished and this method performs satisfactorily in clinical samples. Therefore, it has great potential to be used as a powerful tool benefiting rare cells analysis and the investigation of dynamics of cellular interactions.
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Affiliation(s)
- Nong Yu
- Department of Diagnostics, People's Hospital of Suzhou New District, Suzhou 215010, PR China
| | - Guifeng Ma
- Department of Diagnostics, People's Hospital of Suzhou New District, Suzhou 215010, PR China
| | - Yuyao Chen
- Department of Diagnostics, People's Hospital of Suzhou New District, Suzhou 215010, PR China
| | - Shan Huang
- Department of Diagnostics, People's Hospital of Suzhou New District, Suzhou 215010, PR China
| | - Yalei Gong
- Department of Diagnostics, People's Hospital of Suzhou New District, Suzhou 215010, PR China
| | - Shuangshuang Li
- Department of Diagnostics, People's Hospital of Suzhou New District, Suzhou 215010, PR China
| | - Haiqin Gu
- Department of Diagnostics, People's Hospital of Suzhou New District, Suzhou 215010, PR China
| | - Honglan You
- Department of Diagnostics, People's Hospital of Suzhou New District, Suzhou 215010, PR China.
| | - Peng Miao
- Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou 215163, PR China.
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Huang X, Han Y, Li J, Tang M, Qing G. Sensitive and specific detection of saccharide species based on fluorescence: update from 2016. Anal Bioanal Chem 2023:10.1007/s00216-023-04703-w. [PMID: 37119357 PMCID: PMC10148015 DOI: 10.1007/s00216-023-04703-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 04/12/2023] [Accepted: 04/14/2023] [Indexed: 05/01/2023]
Abstract
Increasing evidence supports the critical role of saccharides in various pathophysiological steps of tumor progression, where they regulate tumor proliferation, invasion, hematogenic metastasis, and angiogenesis. The identification and recognition of these saccharides provide a solid foundation for the development of targeted drug preparations, which are however not fully understood due to their complex and similar structures. In order to achieve fluorescence sensing of saccharides, extensive research has been conducted to design molecular probes and nanoparticles made of different materials. This paper aims to provide in-depth discussion of three main topics that cover the current status of the carbohydrate sensing based on the fluorescence sensing mechanism, including a phenylboronic acid-based sensing platform, non-boronic acid entities, as well as an enzyme-based sensing platform. It also highlights efforts made to understand the recognition mechanisms and improve the sensing properties of these systems. Finally, we present the challenge of achieving high selectivity and sensitivity recognition of saccharides, and suggest possible future avenues for exploration.
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Affiliation(s)
- Xiaohuan Huang
- Hubei Key Laboratory of Pollutant Analysis and Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi, 435002, People's Republic of China
| | - Ying Han
- Hubei Key Laboratory of Pollutant Analysis and Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi, 435002, People's Republic of China
| | - Junrong Li
- Hubei Key Laboratory of Pollutant Analysis and Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi, 435002, People's Republic of China
| | - Mingliang Tang
- College of Life Sciences, Wuhan University, 299 Bayi Road, Wuhan, 430072, People's Republic of China
| | - Guangyan Qing
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, People's Republic of China.
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Huang X, Zhang Z, Chen L, Lin Y, Zeng R, Xu J, Chen S, Zhang J, Cai H, Zhou H, Sun P. Multifunctional Au nano-bridged nanogap probes as ICP-MS/SERS dual-signal tags and signal amplifiers for bacteria discriminating, quantitative detecting and photothermal bactericidal activity. Biosens Bioelectron 2022; 212:114414. [PMID: 35687957 DOI: 10.1016/j.bios.2022.114414] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 05/13/2022] [Accepted: 05/18/2022] [Indexed: 11/17/2022]
Abstract
Ultra-sensitive detection of pathogenic bacteria is of great significance in the early stage of bacterial infections and treatment. In this work, we report a novel strategy using multifunctional Au nano-bridged nanogap nanoparticles (Au NNPs)-based sandwich nanocomposites, that made of Concanavalin A-conjugated Fe3O4@SiO2 NPs (ConA-Fe3O4@SiO2 NPs)/bacteria/aptamer-modified Au NNPs (apt-Au NNPs), for bacteria discrimination and quantitative detection by surface-enhanced Raman scattering (SERS) and inductively coupled plasma mass spectrometry (ICP-MS), and subsequently photothermal antibacterial assay. The sandwich nanocomposite consists of ConA-Fe3O4@SiO2 NPs to magnetically enrich and photothermal killing bacteria, and dual-signal tags of apt-Au NNPs for both SERS sensing and ICP-MS quantification. This strategy can specifically distinguish different kinds of pathogenic bacteria, and provided a good linear relationship of Staphylococcus aureus (S. aureus) in the range from 50 to 104 CFU/mL with a detection limit of 11 CFU/mL, as well as realized ultralow amounts of bacterial detection in serum sample with high accuracy. Based on the quantitative detection, high antibacterial efficiency was monitored by ICP-MS. Overall, the established method combines bacteria discrimination, quantitative detection, and photothermal elimination with a simple and rapid process, which provides a novel way for the early diagnosis and treatment of bacterial infection.
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Affiliation(s)
- Xueqin Huang
- Department of Dermatology, The Second Clinical Medical College, Jinan University (Shenzhen People's Hospital), Shenzhen, 518020, PR China; College of Pharmacy, Jinan University, Guangzhou, 510632, PR China
| | - Zhubao Zhang
- College of Chemistry and Materials Science, Jinan University, Guangzhou, 510632, PR China
| | - Lingzhi Chen
- Department of Dermatology, The Second Clinical Medical College, Jinan University (Shenzhen People's Hospital), Shenzhen, 518020, PR China
| | - Yongjian Lin
- College of Chemistry and Materials Science, Jinan University, Guangzhou, 510632, PR China
| | - Runmin Zeng
- Department of Dermatology, The Second Clinical Medical College, Jinan University (Shenzhen People's Hospital), Shenzhen, 518020, PR China
| | - Jun Xu
- College of Pharmacy, Jinan University, Guangzhou, 510632, PR China
| | - Shanze Chen
- Department of Dermatology, The Second Clinical Medical College, Jinan University (Shenzhen People's Hospital), Shenzhen, 518020, PR China
| | - Jianglin Zhang
- Department of Dermatology, The Second Clinical Medical College, Jinan University (Shenzhen People's Hospital), Shenzhen, 518020, PR China
| | - Huaihong Cai
- College of Chemistry and Materials Science, Jinan University, Guangzhou, 510632, PR China.
| | - Haibo Zhou
- Department of Dermatology, The Second Clinical Medical College, Jinan University (Shenzhen People's Hospital), Shenzhen, 518020, PR China; College of Pharmacy, Jinan University, Guangzhou, 510632, PR China.
| | - Pinghua Sun
- Department of Dermatology, The Second Clinical Medical College, Jinan University (Shenzhen People's Hospital), Shenzhen, 518020, PR China; College of Pharmacy, Jinan University, Guangzhou, 510632, PR China.
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Zuo YN, Xia Y, Li Y, Sun J, Zhao XE, Zhu S. Cascade amplification strategy combined with analyte-triggered fluorescence switching of dual-quenching system for highly sensitive detection of isoniazide. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 276:121234. [PMID: 35413532 DOI: 10.1016/j.saa.2022.121234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 03/25/2022] [Accepted: 04/02/2022] [Indexed: 06/14/2023]
Abstract
A sensitive fluorescence sensing platform consisting of manganese dioxide nanosheets (MnO2) and gold nanoparticles (AuNPs) as dual nanoquenchers has been constructed to detect isoniazid combined with analyte-triggered cascade reactions. The fluorescence of 2,3-diaminophenazine (DAP) is quenched simultaneously by MnO2 and AuNPs via inner filter effect. MnO2 is decomposed by isoniazid to generate Mn2+, which makes AuNPs aggregated. The quenching abilities of both the decomposed MnO2 and aggregated AuNPs are inhibited, causing remarkable fluorescence recovery. The usage of dual nanoquenchers enhances the quenching efficiency and reduces the fluorescence background. Moreover, the isoniazid-triggered cascade reaction further amplifies the readout signal. Thus, this strategy exhibits higher sensitivity towards the detection of isoniazid. Compared with MnO2-based fluorescence assay, this strategy possesses lower limit of detection. This strategy has been successfully used to detect isoniazid in pharmaceutical preparations, which is of great significance for drug analysis.
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Affiliation(s)
- Ya-Nan Zuo
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu City 273165, Shandong, China
| | - Yinghui Xia
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu City 273165, Shandong, China
| | - Yanyu Li
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu City 273165, Shandong, China
| | - Jing Sun
- Qinghai Key Laboratory of Qinghai-Tibet Plateau Biological Resources, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining City 810001, Qinghai, China
| | - Xian-En Zhao
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu City 273165, Shandong, China
| | - Shuyun Zhu
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu City 273165, Shandong, China.
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