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Ding L, Liu Y, Wang L, Yang Y. Distinguishing the responsive mechanisms of fluorescent probes to hydrogen peroxide, proteins, and DNA/RNA. Phys Chem Chem Phys 2024; 26:7765-7771. [PMID: 38372974 DOI: 10.1039/d4cp00082j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2024]
Abstract
The responsive mechanisms of cationic quinolinium-vinyl-N,N-dimethylaniline boronate (QVD-B) derivative probes to hydrogen peroxide (H2O2), proteins and DNA/RNA are theoretically investigated in this study. The potential energy curves of QVD-B scanned on a dihedral angle (N+-C-CC) in the first singlet (S1) state exhibit large torsional energy barriers. Additionally, the energy of the lowest unoccupied molecular orbital (LUMO) of an acceptor moiety (-3.14 eV) is lower than that of a donor moiety (-1.13 eV) in QVD-B. This demonstrates that photoinduced electron transfer (PET) quenches the fluorescence of QVD-B, as opposed to the previous report of intramolecular single-bond rotation. After reacting with H2O2, the reaction product of quinoline-vinyl-N,N-dimethylaniline (QVD) turns off the PET pathway and turns on the fluorescence at 550 nm, which is consistent with the experimental results (580 nm). Among the possible configurations of QVD-B that forms with proteins and DNA, the calculated fluorescence values of corresponding twisted QVD-B-P (638 nm) and QVD-B-D (686 nm) are consistent with the experimental results (632 and 688 nm). The frontier molecular orbital and electron-hole analysis show that the charge transfer distance follows the order of QVD (1.88 Å) < QVD-B-P (4.49 Å) < QVD-B-D (6.39 Å), which induces the fluorescence red-shifts of QVD-B-P and QVD-B-D compared to that of QVD. The multi-detection mechanism of the fluorescent probe QVD-B is attributed to PET progress and different degrees of local charge transfer after photoexcitation.
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Affiliation(s)
- Lina Ding
- School of Chemistry and Chemical Engineering, School of Physics, Henan Normal University, Xinxiang 453007, P. R. China.
| | - Yang Liu
- School of Chemistry and Chemical Engineering, School of Physics, Henan Normal University, Xinxiang 453007, P. R. China.
| | - Liang Wang
- School of Chemistry and Chemical Engineering, School of Physics, Henan Normal University, Xinxiang 453007, P. R. China.
| | - Yonggang Yang
- School of Chemistry and Chemical Engineering, School of Physics, Henan Normal University, Xinxiang 453007, P. R. China.
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Li F, Hu C, Su W, Liang H, Xiao F, Liu J, Tan Y, Yang S. A self-cascade system based on Ag nanoparticle/single-walled carbon nanotube nanocomposites as an enzyme mimic for ultrasensitive detection of L-cysteine. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2023. [PMID: 37366585 DOI: 10.1039/d3ay00445g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/28/2023]
Abstract
L-Cysteine, widely used in medicine and the food industry, is of great essentiality to organisms and the food quality. Given that current detection approaches require exacting lab conditions and tedious sample treatment, there is a pressing demand for developing a method that possesses advantages of user friendliness, prominent performance, and cost-effectiveness. Herein, a self-cascade system was developed for the fluorescence detection of L-cysteine based on the ingenious performance of Ag nanoparticle/single-walled carbon nanotube nanocomposites (AgNP/SWCNTs) and DNA-templated Ag nanoclusters (DNA-AgNCs). The fluorescence of DNA-AgNCs could be quenched on account of the adsorption of DNA-AgNCs on AgNP/SWCNTs by π-π stacking. With the cooperation of Fe2+, AgNP/SWCNTs with oxidase and peroxidase-like activities could catalyze the oxidation of L-cysteine to produce cystine and hydrogen peroxide (H2O2) and then break the O-O bond of H2O2 to generate a hydroxyl radical (·OH), which could cleave the DNA strand into different sequence fragments which subsequently peeled off from the AgNP/SWCNTs, resulting in a "turn-on" fluorescence response. In this paper, AgNP/SWCNTs with multi-enzyme activities was synthesized enabling the reaction to proceed in just one step. The successful preliminary applications for the L-cysteine detection in pharmaceutical, juice beverage, and serum samples indicated that the developed method exhibited great potential in medical diagnosis, food monitoring, and the biochemical field, which also broadened the horizon for follow-up research.
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Affiliation(s)
- Feifei Li
- Department of Public Health Laboratory Sciences, School of Public Health, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China.
- Department of Endocrinology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Congcong Hu
- Department of Public Health Laboratory Sciences, School of Public Health, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China.
| | - Wenen Su
- Department of Public Health Laboratory Sciences, School of Public Health, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China.
| | - Hao Liang
- Department of Public Health Laboratory Sciences, School of Public Health, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China.
| | - Fubing Xiao
- Department of Public Health Laboratory Sciences, School of Public Health, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China.
| | - Jinquan Liu
- Department of Public Health Laboratory Sciences, School of Public Health, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China.
| | - Yan Tan
- Department of Public Health Laboratory Sciences, School of Public Health, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China.
| | - Shengyuan Yang
- Department of Public Health Laboratory Sciences, School of Public Health, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China.
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Song Y, Xia X, Xiao Z, Zhao Y, Yan M, Li J, Li H, Liu X. Synthesis of N,S co-doped carbon dots for fluorescence turn-on detection of Fe2+ and Al3+ in a wide pH range. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Liu H, Zhu C, Mou C. Duplex-specific nuclease and Exo-III enzyme-assisted signal amplification cooperating DNA-templated silver nanoclusters for label-free and sensitive miRNA detection. J Anal Sci Technol 2022. [DOI: 10.1186/s40543-022-00335-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
AbstractDevelopment of novel miRNA detection strategies plays a crucial role in fundamental research and clinical diagnosis of various diseases, such as infantile pneumonia. We herein develop a rapid and sensitive DNA-templated AgNCs-based miRNA detection approach, pinning the hope on an improved detection sensitivity in an easy-to-operate way. In the method, a hairpin probe is designed to specifically bind with target miRNA, and to initiate the DSN enzyme and Exo-III-assisted dual signal recycles. The resultant guanine-rich DNA sequences after signal amplification turn on the fluorescence of the dark AgNCs by hybridizing with the DNA template of the dark AgNCs. The generated signals are correlated with the amounts of target miRNA in the sensing system. Through a series of experiments, the established approach exhibits a great dynamic range of more than seven orders of magnitude with a low limit of detection of 245 aM, holding great promises for miRNA-related researches and disease diagnosis.
Graphical abstract
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Zhao Y, Zhu X, Liu L, Duan Z, Liu Y, Zhang W, Cui J, Rong Y, Dong C. One-Step Synthesis of Nitrogen/Fluorine Co-Doped Carbon Dots for Use in Ferric Ions and Ascorbic Acid Detection. NANOMATERIALS 2022; 12:nano12142377. [PMID: 35889602 PMCID: PMC9323265 DOI: 10.3390/nano12142377] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 07/08/2022] [Accepted: 07/11/2022] [Indexed: 02/04/2023]
Abstract
Carbon dots (CDs) have caught enormous attention owing to their distinctive properties, such as their high water solubility, tunable optical properties, and easy surface modification, which can be generally used for the detection of heavy metals and organic pollutants. Herein, nitrogen and fluorine co-doped carbon dots (NFCDs) were designed via a rapid, low-cost, and one-step microwave-assisted technique using DL-malic acid and levofloxacin. The NFCDs emitted intense green fluorescence under UV lighting, and the optical emission peak at 490 nm was observed upon a 280 nm excitation, with a high quantum yield of 21.03%. Interestingly, the spectral measurements illustrated excitation-independent and concentration-independent single-color fluorescence owing to the presence of nitrogen and fluorine elements in the surface functional groups. Additionally, the NFCDs were applied for the selective detection of Fe3+ and ascorbic acid based on the “turn-off” mode. The detection limits were determined as 1.03 and 4.22 µM, respectively. The quenching mechanisms were explored using the static quenching mechanism and the inner filter effect. Therefore, a NFCDs fluorescent probe with single color emission was successfully developed for the convenient and rapid detection of Fe3+ and ascorbic acid in environments.
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Affiliation(s)
- Yan Zhao
- School of Chemical Engineering, Hebei Normal University of Science and Technology, Qinhuangdao 066004, China; (X.Z.); (L.L.); (Z.D.); (Y.L.); (W.Z.); (J.C.)
- Correspondence: (Y.Z.); (C.D.)
| | - Xiaoxuan Zhu
- School of Chemical Engineering, Hebei Normal University of Science and Technology, Qinhuangdao 066004, China; (X.Z.); (L.L.); (Z.D.); (Y.L.); (W.Z.); (J.C.)
| | - Lu Liu
- School of Chemical Engineering, Hebei Normal University of Science and Technology, Qinhuangdao 066004, China; (X.Z.); (L.L.); (Z.D.); (Y.L.); (W.Z.); (J.C.)
| | - Zhiqing Duan
- School of Chemical Engineering, Hebei Normal University of Science and Technology, Qinhuangdao 066004, China; (X.Z.); (L.L.); (Z.D.); (Y.L.); (W.Z.); (J.C.)
| | - Yanping Liu
- School of Chemical Engineering, Hebei Normal University of Science and Technology, Qinhuangdao 066004, China; (X.Z.); (L.L.); (Z.D.); (Y.L.); (W.Z.); (J.C.)
- Hebei Key Laboratory of Active Components and Functions in Natural Product, Qinhuangdao 066004, China
| | - Weiyuan Zhang
- School of Chemical Engineering, Hebei Normal University of Science and Technology, Qinhuangdao 066004, China; (X.Z.); (L.L.); (Z.D.); (Y.L.); (W.Z.); (J.C.)
| | - Jingjing Cui
- School of Chemical Engineering, Hebei Normal University of Science and Technology, Qinhuangdao 066004, China; (X.Z.); (L.L.); (Z.D.); (Y.L.); (W.Z.); (J.C.)
| | - Yafang Rong
- Shandong Zhengyuan Geophysical Information Technology Co., Ltd., Jinan 250000, China;
| | - Chen Dong
- Cixi Institute of Biomedical Engineering, International Cooperation Base of Biomedical Materials Technology and Application, CAS Key Laboratory of Magnetic Materials and Devices, Zhejiang Engineering Research Center for Biomedical Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
- Correspondence: (Y.Z.); (C.D.)
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Wu L, Pan W, Ye H, Liang N, Zhao L. Sensitive fluorescence detection for hydrogen peroxide and glucose using biomass carbon dots: Dual-quenching mechanism insight. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.128330] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Jiang M, Xu S, Yu Y, Gao Y, Yin Z, Li J, Zhang X, Yu H, Chen B. Turn-on fluorescence ferrous ions detection based on MnO 2 nanosheets modified upconverion nanoparticles. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 264:120275. [PMID: 34411769 DOI: 10.1016/j.saa.2021.120275] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 07/30/2021] [Accepted: 08/08/2021] [Indexed: 06/13/2023]
Abstract
A turn on upconversion fluorescence probe based on the combination of ~32 nm NaYF4: Yb/Tm nanoparticles and MnO2 nanosheets has been established for rapid, sensitive detection of Fe2+ ions levels in aqueous solutions and serum. X-ray diffraction (XRD), transmission electron microscopy (TEM), absorption and emission spectra have been used to characterize the crystal structure, morphology and optical properties of the samples. MnO2 nanosheets on the surface of UCNPs act as a fluorescence quencher, resulting in the quenching of the blue fluorescence (with excitation/emission maximum of 980/476 nm) via fluorescence resonance energy transfer from upconversion nanoparticles to MnO2 nanosheets. With the adding of Fe2+, upconversion fluorescence of the nanocomposites recovers due to the reduction of MnO2 to Mn2+. Because of the low background of the probe offered by upconversion fluorescence, this probe can be used for detecting Fe2+ in aqueous solutions in the range of 0.1-22 μM with detection limit of 0.113 μM. The developed method has also been applied to detect 10 μM Fe2+ ions in serum with recoveries ranging from 97.6 to 105.3% for the five serum samples. Significantly, the probe shows fast response and stable signal, which is beneficial for long-time dynamic sensing. Thus, the proposed strategy holds great potential for disease diagnosis and treatment.
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Affiliation(s)
- Muhan Jiang
- School of Science, Dalian Maritime University, Dalian, Liaoning 116026, People's Republic of China
| | - Sai Xu
- School of Science, Dalian Maritime University, Dalian, Liaoning 116026, People's Republic of China.
| | - Yang Yu
- School of Science, Dalian Maritime University, Dalian, Liaoning 116026, People's Republic of China
| | - Yuefeng Gao
- Marine Engineering College, Dalian Maritime University, Dalian, Liaoning 116026, People's Republic of China
| | - Ze Yin
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843, United States
| | - Jie Li
- School of Science, Dalian Maritime University, Dalian, Liaoning 116026, People's Republic of China
| | - Xizhen Zhang
- School of Science, Dalian Maritime University, Dalian, Liaoning 116026, People's Republic of China
| | - Hongquan Yu
- School of Science, Dalian Maritime University, Dalian, Liaoning 116026, People's Republic of China
| | - Baojiu Chen
- School of Science, Dalian Maritime University, Dalian, Liaoning 116026, People's Republic of China.
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Habibi MM, Mousavi M, Shadman Z, Ghasemi JB. Preparation of a nonenzymatic electrochemical sensor based on g-C3N4/MWO4 (M: Cu, Mn, Co, Ni) composite for the determination of H2O2. NEW J CHEM 2022. [DOI: 10.1039/d1nj05711a] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hydrogen peroxide (H2O2) has a significant effect on physiological proceedings. In the present research, a g-C3N4-based nanocomposite g-C3N4/MWO4(M: Cu, Mn, Co, Ni) was prepared via the precipitation-calcination method. A...
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Wang H, Zhou T, Li W, Wang Z, Liu Y, Wang F, Wang X, Zhang G, Zhang Z. Homocytosine-templated gold nanoclusters as a label-free fluorescent probe: Ferrous ions and glucose detection based on Fenton and enzyme-Fenton reaction. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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10
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Yin JH, Liu M, Meng L, Tan ND, Xu N. Synthesis of water-soluble, ultrabright Cu nanoclusters with core-shell structure via facile reduction approach for determination of 4-nitrophenol. NANOTECHNOLOGY 2021; 33:035601. [PMID: 34348244 DOI: 10.1088/1361-6528/ac1a95] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 08/04/2021] [Indexed: 06/13/2023]
Abstract
In this work, we reported a facile reduction approach for fabrication of water-soluble and ultrabright Cu nanoclusters with core-shell structure. A certain amount of reducing agent as NaBH4was introduced into the polyethyleneimine-stabilized Cu nanoclusters (CuNCs@PEI) system, which exhibited 4-fold fluorescence enhancement along with a blue shift of the emission peak. The variations of morphology, valence states and functional groups demonstrated that a Cu shell was formed surround CuNCs (defined as CuNCs-Cu@PEI), attributable to metal complex (PEI-Cu+and PEI-Cu2+) reduction. The effect of core-shell morphology on luminous and electron relaxation mechanism of CuNCs-Cu@PEI was investigated via temperature-dependent steady and time-resolved fluorescence measurements. The CuNCs-Cu@PEI with a high fluorescence quantum yields of 22.59% were able to homogeneously disperse in aqueous phase, indicating their potential applications in biological labeling, sensing and invivoimaging. Finally, the CuNCs-Cu@PEI was employed as a fluorescence probe to determine 4-nitrophenol, of which the detection limit was much lower than initial CuNCs@PEI.
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Affiliation(s)
- Jian-Hang Yin
- College of Chemistry and Pharmaceutical Engineering, Jilin Institute of Chemical Technology, Jilin 132022, People's Republic of China
- College of Materials Science and Engineering, Jilin Institute of Chemical Technology, Jilin 132022, People's Republic of China
| | - Mengxuan Liu
- College of Materials Science and Engineering, Jilin Institute of Chemical Technology, Jilin 132022, People's Republic of China
| | - Lei Meng
- College of Materials Science and Engineering, Jilin Institute of Chemical Technology, Jilin 132022, People's Republic of China
| | - Nai-Di Tan
- College of Chemistry and Pharmaceutical Engineering, Jilin Institute of Chemical Technology, Jilin 132022, People's Republic of China
| | - Na Xu
- College of Materials Science and Engineering, Jilin Institute of Chemical Technology, Jilin 132022, People's Republic of China
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Metal-organic framework (MOF)-Au@Pt nanoflowers composite material for electrochemical sensing of H2O2 in living cells. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115603] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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12
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Liu Z, Wang L, Liu P, Zhao K, Ye S, Liang G. Rapid, ultrasensitive and non-enzyme electrochemiluminescence detection of hydrogen peroxide in food based on the ssDNA/g-C 3N 4 nanosheets hybrid. Food Chem 2021; 357:129753. [PMID: 33878585 DOI: 10.1016/j.foodchem.2021.129753] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 03/31/2021] [Accepted: 04/04/2021] [Indexed: 12/23/2022]
Abstract
Hydrogen peroxide (H2O2) is usually used as a fungicide in food, it is carcinogenic, accelerates aging or inducing toxic effects such as cardiovascular disease. Herein, to meet the demand for effective and fast detection of H2O2 in food, a novel non-enzymatic electrochemiluminescence (ECL) sensor based on single-stranded DNA (ssDNA)/g-C3N4 nanosheets (NS) was established. The ssDNA/g-C3N4 NS hybrid was prepared by simple mixing g-C3N4 NS and ssDNA solution together. The prepared ssDNA/g-C3N4 NS exhibited improved peroxidase-like activity and was modified on a glassy carbon electrode to catalyze the ECL reaction of luminol-H2O2 to amplify the luminescence signal. Under the optimized conditions, the proposed sensor exhibits high sensitivity with a limit of detection (LOD) as low as 33 aM H2O2, which is much lower than the vast majority of reported methods. This method enables the reliable responding to H2O2 from the milk samples within 1 min.
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Affiliation(s)
- Zhijun Liu
- School of Pharmacy, Jiangsu University, Zhenjiang 212013, China
| | - Li Wang
- School of Pharmacy, Jiangsu University, Zhenjiang 212013, China.
| | - Pengfei Liu
- School of Pharmacy, Jiangsu University, Zhenjiang 212013, China
| | - Kairen Zhao
- School of Pharmacy, Jiangsu University, Zhenjiang 212013, China
| | - Shuying Ye
- School of the Environment, Jiangsu University, Zhenjiang 212013, China
| | - Guoxi Liang
- School of the Environment, Jiangsu University, Zhenjiang 212013, China.
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Discriminating detection of dissolved ferrous and ferric ions using copper nanocluster-based fluorescent probe. Anal Biochem 2021; 623:114171. [PMID: 33775668 DOI: 10.1016/j.ab.2021.114171] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Accepted: 03/12/2021] [Indexed: 01/04/2023]
Abstract
Discrimination and detection of specific metal ions that belong to the same metallic element with different valence states in a complex matrix is challenging. In the present work, a fluorescence method using polyvinylpyrrolidone stabilized copper nanocluster (CuNCs@PVP) as a probe for discriminating detection of ferrous (Fe3+) and ferric (Fe2+) ions was developed. The CuNCs@PVP exhibited an excellent selective response to Fe3+ ions in contrast to Fe2+ ions and other metal ions when the pH value of solution was less than 4.0. Furthermore, the fluorescence of the CuNCs@PVP could be more sensitively quenched by Fe2+ ions by virtue of Fenton reaction. The different response of CuNCs@PVP towards Fe3+ and Fe2+ ions under different conditions offered the potential for the discriminating detection of Fe3+ and Fe2+ ions. Based on detailed optimization of detection conditions, an excellent linear relationship between the fluorescence quenching efficiency (F/F0) of the CuNCs@PVP and the concentration of Fe3+ ions over the range of 0.4-20.0 μM and of Fe2+ ions in the range of 0.01-0.4 μM were obtained, respectively. The detection limits for the Fe3+ and Fe2+ ions were 0.14 μM and 0.008 μM, respectively. The developed probe showed good selectivity and presented an alternative strategy for discriminating detection of Fe3+ and Fe2+ ions in complex samples.
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Hou JT, Zhang M, Liu Y, Ma X, Duan R, Cao X, Yuan F, Liao YX, Wang S, Xiu Ren W. Fluorescent detectors for hydroxyl radical and their applications in bioimaging: A review. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2020.213457] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Xu X, Ji J, Chen P, Wu J, Jin Y, Zhang L, Du S. Salt-induced gold nanoparticles aggregation lights up fluorescence of DNA-silver nanoclusters to monitor dual cancer markers carcinoembryonic antigen and carbohydrate antigen 125. Anal Chim Acta 2020; 1125:41-49. [PMID: 32674779 DOI: 10.1016/j.aca.2020.05.027] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 03/30/2020] [Accepted: 05/09/2020] [Indexed: 11/24/2022]
Abstract
In clinical diagnosis of cancer, the monitoring of single tumor marker may result in many false and missed results, while simultaneous detection of multiple tumor markers should be more accuracy and effective. Here, we report a new strategy that salt-induced gold nanoparticles (AuNPs) aggregation lights up fluorescence of dual-color DNA-silver nanoclusters-aptamer (DNA-AgNCs-apta) for the simultaneous monitoring of carcinoembryonic antigen (CEA) and carbohydrate antigen 125 (CA125). The dual-color aptasensor system is composed of green-emitting DNA-AgNCs with CEA aptamer (gDNA1-AgNCs-apta1) and red-emitting DNA-AgNCs with CA125 aptamer (rDNA2-AgNCs-apta2) in the ratio of 1:1 in volume. Upon addition of AuNPs, gDNA1-AgNCs-apta1 and/or rDNA2-AgNCs-apta2 are flexibly adsorbed onto the surface of AuNPs by terminal aptamer(s), which prevents salt-induced AuNPs aggregation under high salt condition and results in fluorescence quenching based on surface plasmon enhanced energy transfer (SPEET). With the addition of CEA and/or CA125, the target(s) and corresponding aptamer(s) coordinate to form the complex, keeping DNA-AgNCs-apta(s) far away from the surface of AuNPs and making AuNPs aggregated in high salt medium. The AuNPs aggregation leads to the recovery of fluorescence signals of DNA-AgNCs-apta(s) due to weakened SPEET. Utilizing the fluorescence aptasensor system, the limit of detection of CEA and CA125 are as low as 7.5 pg·mL-1 and 0.015 U·mL-1, respectively. The proposed method can be applied to the selective and simultaneous determination of CEA and CA125 in human serum.
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Affiliation(s)
- Xin Xu
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu, 211166, China
| | - Jiangrong Ji
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu, 211166, China
| | - Panpan Chen
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu, 211166, China
| | - Jiafeng Wu
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu, 211166, China
| | - Yang Jin
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu, 211166, China
| | - Liying Zhang
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu, 211166, China
| | - Shuhu Du
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu, 211166, China.
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