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Lin L, Fang M, Liu W, Zheng M, Lin R. Recent advances and perspectives of functionalized carbon dots in bacteria sensing. Mikrochim Acta 2023; 190:363. [PMID: 37610450 DOI: 10.1007/s00604-023-05938-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 07/28/2023] [Indexed: 08/24/2023]
Abstract
Bacterial infectious diseases are severe threats to human health and increase substantial financial burdens. Nanomaterials have shown great potential in timely and accurate bacterial identification, detection, and monitoring to improve the cure rate and reduce mortality. Recently, carbon dots have been evidenced to be ideal candidates for bacterial identification and detection due to their superior physicochemical properties and biocompatibility. This review outlines the detailed recognition elements and recognition strategies with functionalized carbon dots (FCDs) for bacterial identification and detection. The advantages and limitations of different kinds of FCDs-based sensors will be critically discussed. Meanwhile, the ongoing challenges and perspectives of FCDs-based sensors for bacteria sensing are put forward.
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Affiliation(s)
- Liping Lin
- Department of Applied Chemistry, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.
| | - Meng Fang
- Department of Applied Chemistry, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Wei Liu
- Department of Bioinformatics, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Meixia Zheng
- Agricultural Bio-Resources Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou, 350003, China
| | - Rongguang Lin
- Department of Applied Chemistry, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
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Liu J, Song B, Fu T. Dual-emission fluorescence detection of histidine using carbon dots and calcein/Ni 2+ complexes. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 286:121951. [PMID: 36228489 DOI: 10.1016/j.saa.2022.121951] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 10/02/2022] [Accepted: 10/03/2022] [Indexed: 06/16/2023]
Abstract
Histidine (His) is a natural amino acid that plays very important roles in biota. However, the low concentrations of His in biological fluids and the similar structures and properties of other amino acids mean it is difficult to selectively determine His concentrations in biological fluids with a high degree of sensitivity. A novel ratiometric fluorescence probe for detecting His in aqueous solutions is described here. The method involves carbon dots (CDs) and calcein/Ni2+ complexes. At an excitation wavelength of 480 nm, the CD/calcein system emits green fluorescence (maximum emission from calcein at 512 nm) and red fluorescence (maximum emission from CDs at 617 nm). The presence of Ni2+ decreases the calcein fluorescence intensity because of static quenching caused by the formation of calcein/Ni2+ complexes but the CD fluorescence intensity remains almost unchanged. Fluorescence of calcein/Ni2+ complexes provides the response, and the presence of His binds to Ni2+ via cooperative chelation and produces free calcein causing fluorescence to be recovered. CDs provide a self-calibration fluorescence signal, the intensity of which remains almost unchanged in the presence of His. The ratio of the fluorescence intensities at 512 and 617 nm (I512/I617) was strongly related to the His concentration in the range 0.5-22 μM, and the detection limit was 0.16 μM. The specificity of Ni2+/His interactions allows His to be determined without interference from other species. The method was successfully used to determine His in diluted human urine. The recovery was acceptable, suggesting that the biosensor can be used to determine His in real samples.
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Affiliation(s)
- Jinshui Liu
- College of Chemistry and Materials Science, Anhui Key Laboratory of Chemo/Biosensing, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-based Materials, Anhui Normal University, Wuhu 241000, China.
| | - Bo Song
- College of Chemistry and Materials Science, Anhui Key Laboratory of Chemo/Biosensing, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-based Materials, Anhui Normal University, Wuhu 241000, China
| | - Ting Fu
- College of Chemistry and Materials Science, Anhui Key Laboratory of Chemo/Biosensing, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-based Materials, Anhui Normal University, Wuhu 241000, China
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Duan M, Li B, Zhao Y, Liu Y, Liu Y, Dai R, Li X, Jia F. A CRISPR/Cas12a-mediated, DNA extraction and amplification-free, highly direct and rapid biosensor for Salmonella Typhimurium. Biosens Bioelectron 2023; 219:114823. [PMID: 36308834 DOI: 10.1016/j.bios.2022.114823] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 10/13/2022] [Accepted: 10/14/2022] [Indexed: 11/19/2022]
Abstract
CRISPR/Cas-based biosensors were typically used for nucleic-acid targets detection and complex DNA extraction and amplification procedures were usually inevitable. Here, we report a CRISPR/Cas12a-mediated, DNA extraction and amplification-free, highly direct and rapid biosensor (abbreviated as "CATCHER") for Salmonella Typhimurium (S. Typhimurium) with a simple (3 steps) and fast (∼2 h) sensing workflow. Magnetic nanoparticle immobilized anti-S. Typhimurium antibody was worked as capture probe to capture the target and provide movable reaction interface. Colloidal gold labeled with anti-S. Typhimurium antibody and DNase I was used as detection probe to bridge the input target and output signal. First, in the presence of S. Typhimurium, an immuno-sandwich structure was formed. Second, DNase I in sandwich structure degraded the valid, complete activator DNA to invalid DNA fragments which can't trigger the trans-cleavage activity of Cas12a. Finally, the integrity of reporter DNA was preserved presenting a low fluorescence signal. Conversely, in the absence of S. Typhimurium, strong fluorescence recovery appeared owing to the cutting of reporter by activated Cas12a. Significantly, the proposed "CATCHER" showed satisfactory detection performance for S. Typhimurium with the limit of detection (LOD) of 7.9 × 101 CFU/mL in 0.01 M PBS and 6.31 × 103 CFU/mL in spiked chicken samples, providing a general platform for non-nucleic acid targets.
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Affiliation(s)
- Miaolin Duan
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Bingyan Li
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Yijie Zhao
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Yana Liu
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Yi Liu
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Ruitong Dai
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Xingmin Li
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China.
| | - Fei Jia
- Department of Biological and Agricultural Engineering, University of Arkansas, Fayetteville, AR, 72701, USA.
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Yang G, Zhang J, Gu L, Tang Y, Zhang X, Huang X, Shen X, Zhai W, Fodjo EK, Kong C. Ratiometric Fluorescence Immunoassay Based on Carbon Quantum Dots for Sensitive Detection of Malachite Green in Fish. BIOSENSORS 2022; 13:38. [PMID: 36671873 PMCID: PMC9855656 DOI: 10.3390/bios13010038] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 12/23/2022] [Accepted: 12/25/2022] [Indexed: 06/17/2023]
Abstract
Malachite green (MG) is a synthetic poisonous organic compound that has been banned in many countries as a veterinary drug for aquaculture. An efficient, fast and sensitive method is urgently needed for monitoring the illegal use of malachite green (MG) in aquaculture. In this study, a novel ratiometric fluorescence immunoassay was established. Nitrogen-doped carbon quantum dots were used as ratiometric fluorescent probes with a fluorescence peak at 450 nm. Horseradish peroxidase was employed to convert o-phenylenediamine to 2,3-diaminophenazine, with a new fluorescence peak at 580 nm and a strong absorption at 420 nm. The inner filter effect between N-CQD fluorescence and DAP absorption was identified. It allows for the ratiometric detection of MG using a fluorescent immunoassay. The results demonstrated a linear ratiometric fluorescence response for MG between 0.1 and 12.8 ng·mL-1. The limit of detection of this method was verified to be 0.097 μg·kg-1 with recoveries ranging from 81.88 to 108%, and the relative standard deviations were below 3%. Furthermore, this method exhibited acceptable consistency with the LC-MS/MS results when applied for MG screening in real samples. These results demonstrated a promising application of this novel ratiometric fluorescence immunoassay for MG screening with the merits of rapid detection, simple sample preparation, and stable signal readout. It can be an alternative to other traditional methods if there are difficulties in the availability of expensive instruments, and achieve comparable results or even more sensitivity than other reported methods.
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Affiliation(s)
- Guangxin Yang
- East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200090, China
| | - Jingru Zhang
- East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200090, China
| | - Lin Gu
- School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200090, China
| | - Yunyu Tang
- East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China
| | - Xuan Zhang
- East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China
| | - Xuanyun Huang
- East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China
| | - Xiaosheng Shen
- East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China
| | - Wenlei Zhai
- Institute of Quality Standard and Testing Technology, Beijing Academy of Agriculture and Forestry Science, Beijing 100097, China
| | - Essy Kouadio Fodjo
- Physical Chemistry Laboratory, UFR SSMT, Université Felix Houphouet Boigny, Abidjan 22 BP 582, Côte d’Ivoire
| | - Cong Kong
- East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China
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Novel Dual-Color Immunochromatographic Assay Based on Chrysanthemum-like Au@polydopamine and Colloidal Gold for Simultaneous Sensitive Detection of Paclobutrazol and Carbofuran in Fruits and Vegetables. Foods 2022; 11:foods11111564. [PMID: 35681314 PMCID: PMC9180898 DOI: 10.3390/foods11111564] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 05/18/2022] [Accepted: 05/20/2022] [Indexed: 11/23/2022] Open
Abstract
To ensure food safety and prevent the toxic effects of paclobutrazol (PBZ) and carbofuran (CAR) on humans, a sensitive and rapid method for the detection of PBZ and CAR in fruits and vegetables is required. Herein, a highly sensitive PBZ monoclonal antibody (PBZ mAb) and CAR monoclonal antibody (CAR mAb) with half-inhibitory concentrations (IC50) at 0.77 and 0.82 ng mL−1 were prepared, respectively. We proposed a novel dual-color immunochromatographic assay (ICA) with two test lines (T1 and T2) and an independent control line (C) based on chrysanthemum-like Au@Polydopamine (AuNC@PDA) and colloidal gold (AuNPs) for the simultaneous and sensitive detection of PBZ and CAR with naked-eye detection limits of 10 and 5 μg kg−1, respectively. The limits of detection (LOD) for PBZ and CAR were 0.117 and 0.087 μg kg−1 in orange, 0.109 and 0.056 μg kg−1 in grape, and 0.131 and 0.094 μg kg−1 in cabbage mustard, respectively. The average recoveries of PBZ and CAR in orange, grape, and cabbage mustard were 97.86−102.83%, with coefficients of variation from 8.94 to 11.05. The detection results of this method for 30 samples (orange, grapes, and cabbage mustard) agreed well with those of liquid chromatography–tandem mass spectrometry. The novel dual-color ICA was sensitive, rapid, and accurate for the simultaneous detection of PBZ and CAR in real samples.
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Li X, Xing X, Zhao S, Zhu S, Wang B, Lan M, Song X. Carbon dot-based fluorescent and colorimetric sensor for sensitive and selective visual detection of benzoyl peroxide. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2021.09.086] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Sheng X, Li S, Zhan Y, Guo J, Zhou B, Zhao J, Li Z, Liu M, Li Y, Qu T, Zhou Q. Selective detection of Cu 2+ using nitrogen-doped carbon dots derived from humic acid and urea based on specific inner filter effect. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 263:120136. [PMID: 34273895 DOI: 10.1016/j.saa.2021.120136] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Revised: 06/23/2021] [Accepted: 06/29/2021] [Indexed: 06/13/2023]
Abstract
A new kind of nitrogen-doped carbon dots (N-CDs) was synthesized via a simple hydrothermal strategy using humic acid as the carbon source and urea as the nitrogen source. The fluorescence intensity of as-prepared N-CDs was quenched significantly in presence of Cu2+ based on a specific inner filter effect, which could be utilized to construct a selective sensor for monitoring Cu2+ in aqueous samples. The sensor exhibited good linearity over the range of 0.1-2 μM, and high sensitivity with a detection limit of 25 nM. Under the optimal conditions, there was no significant interference by other metal ions such as Cd2+, Al3+, Cr3+, Fe3+, Pb2+, Na+, Ni+, Fe2+, Ba2+, Ca2+, Co2+, Mg2+, As3+, K+, Zn2+ for Cu2+ detecting except Hg2+.The interference of Hg2+ can be masked by addition of sodium chloride. The experimental results demonstrated that the prepared N-CDs owned strong fluorescence, high monodispersity, good stability and good water solubility, and the constructed sensor had many advances and great application prospect in environmental field.
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Affiliation(s)
- Xueying Sheng
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing, Beijing 102249, China
| | - Shuangying Li
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing, Beijing 102249, China
| | - Yali Zhan
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing, Beijing 102249, China
| | - Jinghan Guo
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing, Beijing 102249, China
| | - Boyao Zhou
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing, Beijing 102249, China
| | - Jingyi Zhao
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing, Beijing 102249, China
| | - Zhi Li
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing, Beijing 102249, China
| | - Menghua Liu
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing, Beijing 102249, China
| | - Yanhui Li
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing, Beijing 102249, China
| | - Tongxu Qu
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing, Beijing 102249, China
| | - Qingxiang Zhou
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing, Beijing 102249, China.
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Electrofusion preparation of anti-triazophos monoclonal antibodies for development of an indirect competitive enzyme-linked immunosorbent assay. J Immunol Methods 2021; 500:113184. [PMID: 34808129 DOI: 10.1016/j.jim.2021.113184] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 10/04/2021] [Accepted: 11/07/2021] [Indexed: 11/22/2022]
Abstract
Immunoassays have been widely used to detect small molecular contaminants due to the advantages of simplicity, high throughout and low-cost. Antibodies are essential reagents of immunoassays, their quality directly determines the characteristics of immunoassays. In this study, the monoclonal antibodies (mAbs) of triazophos were prepared by electrofusion, and used to develop an indirect competitive enzyme-linked immunosorbent assay (ic-ELISA). Under the optimal electrofusion conditions (cells treatment with pronase, the alternating electric field strength of 45 V cm-1, the direct current voltage of 3 kV), the fusion efficiency was 1.104 ± 0.063‱, which was improved more than 4-fold compared with the chemical fusion method (0.255 ± 0.089‱). Three hybrid cell lines that can stably secrete the anti-triazophos mAbs were obtained. The cell line 4G6F10 showed the highest sensitivity, which was used to generate mAb and develop an ic-ELISA. After optimization, the 50% inhibition concentration (IC50), limit of detection (LOD) and linear range (IC10-IC90) of the ic-ELISA were 0.32 ng mL-1, 0.08 ng mL-1 and 0.08-2.17 ng mL-1, respectively. There was no significant cross-reactivity with the analogues of triazophos. The average recoveries of triazophos in spiked samples were 77.5%-89.3% with the relative standard deviations of 0.1%-9.2%. In addition, the ic-ELISA showed good repeatability, reproducibility and accuracy for the analysis of apple samples spiked with triazophos.
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Microwave-assisted solid-phase synthesis of nitrogen-doping carbon dot with good solvent compatibility and its sensing of sunitinib. Anal Bioanal Chem 2021; 413:6435-6447. [PMID: 34401928 DOI: 10.1007/s00216-021-03609-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 07/19/2021] [Accepted: 08/06/2021] [Indexed: 10/20/2022]
Abstract
Microwave-assisted solid-phase synthesis method was simple, convenient, and fast, and herein adopted to produce nitrogen-doping carbon dots (N-CDs) in only 3 min. The N-CDs possessed high fluorescence quantum yield up to 15.9% with satisfactory stability to the environmental pH, ionic strength, and ultraviolet radiation. Particularly, the N-CDs had excellent dispersibility in both water and water-compatible organic solvents with similar fluorescence properties. Sunitinib, a small-molecule tyrosine inhibitor effective for some solid tumors, was found to quench the fluorescence of N-CDs in these media via the inner-filter effect. Hence, it was convenient to combine the proper sample pretreatment with the N-CD probe for sensing sunitinib avoiding the medium incompatibility problem. For rat plasma sample, salting-out liquid-liquid extraction was employed to minimize the sample matrix and concentrate the target sunitinib from aqueous to acetonitrile. The fluorescence detection of sunitinib was then achieved in acetonitrile by the addition of the proper amount of N-CDs. The method provided a good linearity of 0.1 μg/mL to 7 μg/mL with a limit of detection of 30 ng/mL, which met the requirement of the therapeutic drug monitoring of sunitinib. The developed method was potential for on-site detection of sunitinib.
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