1
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Ma X, Zhu R, Zhang H, Meng Z. pH-responsive persistent luminescence nanoprobes biosensor for autofluorescence-free determination of glucose level in human samples and fingerprint encryption. LUMINESCENCE 2024; 39:e4900. [PMID: 39261303 DOI: 10.1002/bio.4900] [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: 07/04/2024] [Revised: 07/25/2024] [Accepted: 08/16/2024] [Indexed: 09/13/2024]
Abstract
Glucose level is an important indicator of diabetes, and maintaining an appropriate physiological concentration of glucose is important for human health. However, traditional optical sensors are interfered by the interference of strong background autofluorescence and natural responsive luminescence, which severely limits their application in complex biological samples. Herein, as a novel glucose biosensing probe, green-emitting Zn2GeO4:Mn2+, Eu3+ (ZGME) persistent luminescence nanoparticles (PLNPs) with pH stimulus-responsive was prepared by a facile one-pot hydrothermal method. We also investigated the pH stimulus-responsive luminescence behaviour of ZGME over a range of pH values from 2.8 to 8.0. Taking advantage of the interesting property that ZGME photoluminescence intensity has a pH response, within an extraordinarily narrow pH range of 5.0-6.5 for highly selectivity and sensitive determination of glucose level in human samples by acid-responsive quenching and persistent luminescent performance. The detection results show high accuracy of the measured values of glucose in serum with a wide detection range (2.5 μg L-1-10 mg L-1) and low detection limit (0.5 μg L-1). Finally, the pH-responsive persistent luminescence also makes ZGME promising for high-level fingerprint information encryption. Hence, the established pH stimulation-responsive PLNPs-based biosensing probe offers excellent performance with high selective, accuracy and signal-to-noise ratio for detection of glucose level in human samples.
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Affiliation(s)
- Xiaohu Ma
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan, China
| | - Runzhi Zhu
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan, China
| | - Hui Zhang
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan, China
| | - Zhe Meng
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan, China
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2
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Gupta A, Kaur S, Singh H, Garg S, Kumar A, Malhotra E. Quantum dots: a tool for the detection of explosives/nitro derivatives. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2023; 15:6362-6376. [PMID: 37975188 DOI: 10.1039/d3ay01566a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
Nitro derivatives are considered as major environmental pollutants and issues of health concern. In current times, a variety of methods and techniques have been utilized for the sensing of these nitro derivatives. In view of this, the remarkable fluorescence properties of quantum dots (QDs) provide a great opportunity to detect these nitro derivatives. This review highlighted the recent reports of QDs as the sensing material for these nitro derivative explosives. Different modifications in QDs using physical and chemical approaches can be used to improve their sensing output. Various interaction mechanisms have been discussed between QDs and nitro derivatives to change their fluorescence properties. Finally, the current challenges and the perspective for the forthcoming future are provided in the concluding section. We hope this review will be beneficial in guiding the utilization of QDs in sensing applications.
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Affiliation(s)
- Ankush Gupta
- Department of Chemistry, DAV University, Jalandhar 144012, Punjab, India.
| | - Sharanjeet Kaur
- Department of Chemistry, DAV University, Jalandhar 144012, Punjab, India.
| | - Harminder Singh
- Department of Chemistry, DAV University, Jalandhar 144012, Punjab, India.
| | - Shelly Garg
- Department of Mathematics, DAV University, Jalandhar 144012, Punjab, India
| | - Akshay Kumar
- Department of Chemistry and Chemical Sciences, Central University of Jammu, Jammu 181143, India
| | - Ekta Malhotra
- Department of Chemistry, DAV University, Jalandhar 144012, Punjab, India.
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3
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Pournamdari E, Niknam L. Resonance Rayleigh scattering technique-using chitosan-capped gold nanoparticles, approaches spectrofluorimetric method for determination of Bentazone residual in water samples. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2023; 58:628-636. [PMID: 37767957 DOI: 10.1080/03601234.2023.2262348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/29/2023]
Abstract
In this study, a resonance Rayleigh scattering technique-based sensing method for detecting Bentazone residual in water samples has been developed. This technique was carried out using chitosan-capped gold nanoparticles with a spectrofluorimetric method. Experimental results revealed that the developed method could allow the detection of Bentazone residual as low as a concentration of 0.02 ng mL-1 within 50-sec time. Overall results confirmed the very low detection limit for measuring the Bentazone. The chitosan-capped gold nanoparticles as an excellent sensor were applied to measure and analyze Bentazone in water samples.
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Affiliation(s)
- Elham Pournamdari
- Department of Chemistry, Islamshahr Branch, Islamic Azad University, Islamshahr, Iran
| | - Leila Niknam
- Department of Chemistry, Islamshahr Branch, Islamic Azad University, Islamshahr, Iran
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4
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Fan X, Lv J, Li R, Chen Y, Zhang S, Liu T, Zhou S, Shao X, Wang S, Hu G, Yue Q. Paper test strip for silver ions detection in drinking water samples based on combined fluorometric and colorimetric methods. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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5
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Ratre P, Jain B, Kumari R, Thareja S, Tiwari R, Srivastava RK, Goryacheva IY, Mishra PK. Bioanalytical Applications of Graphene Quantum Dots for Circulating Cell-Free Nucleic Acids: A Review. ACS OMEGA 2022; 7:39586-39602. [PMID: 36385871 PMCID: PMC9648045 DOI: 10.1021/acsomega.2c05414] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Accepted: 10/06/2022] [Indexed: 05/09/2023]
Abstract
Graphene quantum dots (GQDs) are carbonaceous nanodots that are natural crystalline semiconductors and range from 1 to 20 nm. The broad range of applications for GQDs is based on their unique physical and chemical properties. Compared to inorganic quantum dots, GQDs possess numerous advantages, including formidable biocompatibility, low intrinsic toxicity, excellent dispensability, hydrophilicity, and surface grating, thus making them promising materials for nanophotonic applications. Owing to their unique photonic compliant properties, such as superb solubility, robust chemical inertness, large specific surface area, superabundant surface conjugation sites, superior photostability, resistance to photobleaching, and nonblinking, GQDs have emerged as a novel class of probes for the detection of biomolecules and study of their molecular interactions. Here, we present a brief overview of GQDs, their advantages over quantum dots (QDs), various synthesis procedures, and different surface conjugation chemistries for detecting cell-free circulating nucleic acids (CNAs). With the prominent rise of liquid biopsy-based approaches for real-time detection of CNAs, GQDs-based strategies might be a step toward early diagnosis, prognosis, treatment monitoring, and outcome prediction of various non-communicable diseases, including cancers.
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Affiliation(s)
- Pooja Ratre
- Department
of Molecular Biology, ICMR-National Institute
for Research in Environmental Health, Bhopal, 462030, India
| | - Bulbul Jain
- Department
of Molecular Biology, ICMR-National Institute
for Research in Environmental Health, Bhopal, 462030, India
| | - Roshani Kumari
- Department
of Molecular Biology, ICMR-National Institute
for Research in Environmental Health, Bhopal, 462030, India
| | - Suresh Thareja
- Department
of Pharmaceutical Sciences and Natural Products, Central University of Punjab, Bathinda, 151401, India
| | - Rajnarayan Tiwari
- Department
of Molecular Biology, ICMR-National Institute
for Research in Environmental Health, Bhopal, 462030, India
| | - Rupesh Kumar Srivastava
- Department
of Biotechnology, All India Institute of
Medical Sciences, New Delhi, 110029, India
| | - Irina Yu Goryacheva
- Department
of General and Inorganic Chemistry, Institute
of Chemistry, Saratov State University, Saratov, 410012, Russia
| | - Pradyumna Kumar Mishra
- Department
of Molecular Biology, ICMR-National Institute
for Research in Environmental Health, Bhopal, 462030, India
- E-mail: . Mobile: +91 94799 83943
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6
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Wei X, Qiao X, Fan J, Dong H, Zhang Y, Zhou Y, Xu M. Electrochemiluminescence biosensor for carcinoembryonic antigen detection based on Au-Ag/g-C3N4 nanocomposites. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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7
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Impedimetric aptasensor based on zirconium-cobalt metal-organic framework for detection of carcinoembryonic antigen. Mikrochim Acta 2022; 189:338. [PMID: 35980479 DOI: 10.1007/s00604-022-05427-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 07/21/2022] [Indexed: 10/15/2022]
Abstract
A zirconium-cobalt metal-organic framework (ZrCo-MOF) was prepared and used as sensing material to fabricate an aptasensor for trace detection of carcinoembryonic antigen (CEA). The ZrCo-MOF integrates the 3D porous structure and abundant defects of the MOF framework, the catalytic activity and inherent redox behavior of Co, and high stability of Zr-MOF, providing abundant active sites to effectively anchor aptamers. As a result, the ZrCo-MOF-based aptasensor shows high sensitivity to detect CEA via specific recognition between aptamer and CEA, as well as the formation of aptamer-CEA complex. A detection limit of 0.35 fg·mL-1 was deduced from the electrochemical impedance spectroscopy within a wide linear range of 0.001-100 pg·mL-1 for CEA, which was substantially lower than those of most reported CEA biosensors. The ZrCo-MOF-based aptasensor also shows good selectivity, reproducibility, regenerability, stability, and applicability for human serum sample. Therefore, the developed ZrCo-MOF-based aptasensor will be promising for ultrasensitive detection of biomarkers and the early diagnosis of cancer. This work presents a novel electrochemical aptasensor for the trace detection of carcinoembryonic antigen (CEA) based on a zirconium-cobalt metal-organic framework (ZrCo-MOF), which shows low detection limit of 0.35 fg·mL-1, high selectivity as well as good reproducibility, regenerability, stability, and applicability. The result provides a promising approach to detect the cancer biomarkers in an early age.
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8
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Jamalipour P, Choobkar N, Abrishamkar M, Pournamdari E. Design of fluorescent method for sensing toxic diazinon in water samples using PbS quantum dots-based gelatin. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2022; 57:720-728. [PMID: 35899463 DOI: 10.1080/03601234.2022.2103936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
In this current article, a chemical sensor was synthesized PbS functionalized with gelatin quantum dots for toxic diazinon. The measure of toxic diazinon was performed using concentration 0.5 µM, PbS quantum dot-gelatin nanocomposites sensor, pH 6, and time 50 s, wavelength 300 nm, in phosphate buffer solution. Under the optimum conditions, the detection limit linear range was obtained (0.01-20.0 µg L-1). The standard deviation of less than (1.0%), and detection limits (3S/m) of the method (0.01 µg L-1) and quantification (LOQ) of (0.099 µg L-1), for determination of toxic diazinon, was obtained. The observed outcomes confirmed the suitability recovery and a very low detection limit for measuring the toxic diazinon. The Chemical PbS Quantum Dot-Gelatin nanocomposites sensor as excellent sensor was applied to measure and analyze residue toxic diazinon in water samples.
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Affiliation(s)
- Parisa Jamalipour
- Department of Environment, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
| | - Nasrin Choobkar
- Department of Environment, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
| | - Maryam Abrishamkar
- Department of Chemistry, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran
| | - Elham Pournamdari
- Department of Chemistry, Islamshahr Branch, Islamic Azad University, Islamshahr, Iran
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9
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Liang X, Lin Z, Li L, Tang D, Kong J. Ratiometric fluorescence enzyme-linked immunosorbent assay based on carbon dots@SiO 2@CdTe quantum dots with dual functionalities for alpha-fetoprotein. Analyst 2022; 147:2851-2858. [PMID: 35621880 DOI: 10.1039/d2an00691j] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Molecular tags such as fluorophores are increasingly being replaced with nanoparticles thanks to their superior optical properties, substantial chemical stability, and stability against photobleaching. Herein, we innovatively constructed a new ratiometric fluorescence enzyme-linked immunosorbent assay (RF-ELISA) for the screening of alpha-fetoprotein (AFP) in early hepatocellular carcinoma in vitro diagnostics using carbon dots@SiO2@CdTe quantum dots (CDs@SiO2@CdTe QDs). Carbon dots with blue fluorescence were initially encapsulated into SiO2 nanospheres through the typical Stöber method. Thereafter, CdTe QDs with red fluorescence were modified onto the surface of CDs@SiO2 nanospheres. Dual-emission nanotags with blue and red fluorescent signals were utilized to design a RF-ELISA method for the determination of AFP on the anti-AFP capture antibody-coated microplate using glucose oxidase (GOx)-labeled anti-AFP secondary antibody. After the formation of the sandwiched immunocomplex, GOx catalyzed glucose to generate hydrogen peroxide (H2O2), which could quench the red fluorescence of CdTe QDs on the surface of nanotags. Meanwhile, the encapsulated carbon dots in the nanotags could still maintain the initial blue fluorescence intensity. The ratio between red fluorescence intensity and blue-emission intensity could be used for the quantitative monitoring of AFP concentration under optimum conditions. The experimental results indicated that CDs@SiO2@CdTe QDs-based RF-ELISA could exhibit a good fluorescence signal with a dynamic linear range of 0.05-60 ng mL-1 at a low detection limit of 8.7 pg mL-1. Moreover, the fluorescence color of the solution including CDs@SiO2@CdTe QDs changed from pink to purple to blue with the increasing AFP level when viewed by the naked eye. Good reproducibility, high specificity, and acceptable stability were achieved for the analysis of target AFP. Importantly, the accuracy of ratiometric fluorescence immunoassay was evaluated to determine human serum samples, giving well-matched results relative to commercially usable human AFP ELISA method.
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Affiliation(s)
- Xiuhui Liang
- Department of Operating Theatre, Department of Liver Disease, Mengchao Hepatobiliary Hospital of Fujian Medical University, Fuzhou 350025, China.
| | - Zhenzhen Lin
- Key Laboratory of Analytical Science for Food Safety and Biology (MOE & Fujian Province), Department of Chemistry, Fuzhou University, Fuzhou 350108, China.,Guoguang Middle School, Nan'an, Nan'an 362321, Fujian, China
| | - Ling Li
- The First Clinical Medical College of Fujian Medical University, Fuzhou 350004, China. .,Department of Intervention, Mengchao Hepatobiliary Hospital of Fujian Medical University, Fuzhou 350025, China.,Hepatopancreatobiliary Surgery Department, The First Affiliated Hospital of Fujian Medical University, Fuzhou 350004, China
| | - Dianping Tang
- Department of Operating Theatre, Department of Liver Disease, Mengchao Hepatobiliary Hospital of Fujian Medical University, Fuzhou 350025, China. .,Key Laboratory of Analytical Science for Food Safety and Biology (MOE & Fujian Province), Department of Chemistry, Fuzhou University, Fuzhou 350108, China
| | - Jinfeng Kong
- Department of Operating Theatre, Department of Liver Disease, Mengchao Hepatobiliary Hospital of Fujian Medical University, Fuzhou 350025, China.
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10
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May BM, Bambo MF, Hosseini SS, Sidwaba U, Nxumalo EN, Mishra AK. A review on I-III-VI ternary quantum dots for fluorescence detection of heavy metals ions in water: optical properties, synthesis and application. RSC Adv 2022; 12:11216-11232. [PMID: 35425084 PMCID: PMC8996947 DOI: 10.1039/d1ra08660j] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2021] [Accepted: 03/04/2022] [Indexed: 12/30/2022] Open
Abstract
Heavy metal contamination remains a major threat to the environment. Evaluating the concentrations of heavy metals in water environments is a crucial step towards a viable treatment strategy. Non-cadmium photo-luminescent I-III-VI ternary QDs have attracted increasing attention due to their low toxicity and extraordinary optical properties, which have made them popular in biological applications. Recently, ternary I-III-VI-QDs have gained growing interest as fluorescent detectors of heavy metal ions in water. Here, we review the research progress of ternary I-III-VI QDs for the fluorescence detection of heavy metal ions in water. First, we summarize the optical properties and synthesis methodologies of ternary I-III-VI QDs. Then, we present various detection mechanisms involved in the fluorescence detection of heavy metal ions, which are mostly attributed to direct interaction between these unique QDs and the metal ions, seen in the form of fluorescence quenching and fluorescence enhancement. We also display the potential applications in environmental remediation such as water treatment and associated challenges of I-III-VI QDs in the fluorescence detection of Cu2+ and other metal ions.
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Affiliation(s)
- Bambesiwe M May
- Institute for Nanotechnology and Water Sustainability (iNanoWS), College of Science, Engineering and Technology, University of South Africa, Florida Campus Johannesburg South Africa
- Mintek Analytical Chemistry Division Private Bag X3015 Randburg 2125 South Africa
| | - Mokae F Bambo
- DSI/Mintek Nanotechnology Innovation Centre, Advanced Materials Division Private Bag X3015 Randburg 2125 South Africa
| | - Seyed Saeid Hosseini
- Institute for Nanotechnology and Water Sustainability (iNanoWS), College of Science, Engineering and Technology, University of South Africa, Florida Campus Johannesburg South Africa
- Department of Chemical Engineering, Vrije Universiteit Brussel Pleinlaan 2 1050 Brussels Belgium
| | - Unathi Sidwaba
- Institute for Nanotechnology and Water Sustainability (iNanoWS), College of Science, Engineering and Technology, University of South Africa, Florida Campus Johannesburg South Africa
| | - Edward N Nxumalo
- Institute for Nanotechnology and Water Sustainability (iNanoWS), College of Science, Engineering and Technology, University of South Africa, Florida Campus Johannesburg South Africa
| | - Ajay K Mishra
- Department of Medicine and Chemical Engineering, Hebei University of Science and Technology Shijiazhuang 050018 China
- Academy of Nanotechnology and Waste Water Innovations Johannesburg South Africa
- Department of Chemistry, School of Applied Sciences, KIIT Deemed University Odisha India
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11
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Lin X, Zou L, Lan W, Liang C, Yin Y, Liang J, Zhou Y, Wang J. Progress of metal nanoclusters in nucleic acid detection. Dalton Trans 2021; 51:27-39. [PMID: 34812463 DOI: 10.1039/d1dt03183j] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The development and application of metal nanoclusters (MNCs) in nucleic acid testing in the past 10 years have been summarized. Fluorescence enhancement and red shift can occur when the G-rich sequence gets close to Ag NCs or the complementary DNA strand hybridizes with Ag NCs tail strand, which can be used to identify the nucleic acid. Ag NCs with the abasic site in DNA duplex can distinguish mutant genes such as cancer suppression gene p53. Ag NCs with auxiliary DNA can be used to detect miR-21, miR-16-5p, miR-19b-3p, and miR-141. Cu NCs/Cu NPs can recognize miRNA-155, miR-21, and miR-let-7d without auxiliary DNA. Au NCs can identify H1N1 gene fragments by fluorescence quenching caused by proximity to the G-rich sequence. Besides, Au NCs can recognize miRNA-21 and let-7a. SsDNA MNCs adsorbed on the surface of GO and CNPs oxide can be used to identify HBV and HIV gene fragments. The addition of enzymes or auxiliary amplification technologies is a popular way to improve probe sensitivity. Ag NCs combined with TAIEA has the best performance and can obtain LOD as low as aM for miRNA.
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Affiliation(s)
- Xia Lin
- Medical college, Guangxi University, Nanning, 530004, China. .,College of Chemistry and Chemical engineering, Guangxi University, Nanning, 530004, China. .,Guangxi medical college, Nanning, 530023, China.
| | - Lianjia Zou
- Guangxi medical college, Nanning, 530023, China.
| | - Weisen Lan
- College of Agriculture, Guangxi University, Nanning, 530004, China
| | | | - Yanchun Yin
- Guangxi medical college, Nanning, 530023, China.
| | - Jian Liang
- Medical college, Guangxi University, Nanning, 530004, China.
| | | | - Jianyi Wang
- Medical college, Guangxi University, Nanning, 530004, China. .,College of Chemistry and Chemical engineering, Guangxi University, Nanning, 530004, China.
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12
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Li S, Ge W, Suryoprabowo S, Liu J, Kuang H, Zhu J, Liu L, Xu C. A paper-based sensor for rapid and ultrasensitive detection of ibuprofen in water and herbal tea. Analyst 2021; 146:6874-6882. [PMID: 34633393 DOI: 10.1039/d1an01533h] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
As the use of non-steroidal anti-inflammatory drugs (NSAIDS) increases, their side effects have also attracted attention. Ibuprofen is one of the most widely-used NSAIDs. In this study, we screened the highly-sensitive and specific antibody 6E10, with an IC50 of 1.92 ng mL-1, and a linear range of 0.53-6.97 ng mL-1. In this study, we developed a rapid lateral flow immunochromatographic assay (ICA) strip method to detect ibuprofen in water or herbal tea. The cut-off limit of the strip is 10 ng mL-1 in water, and concentrations as low as 1 ng mL-1 can be detected in herbal tea samples, with the results obtained by the naked eye within 6 min. All the data were confirmed by high performance liquid chromatography-quadrupole time of flight-mass spectrometry (HPLC-QTOF-MS). This lateral-flow ICA strip is thus a rapid tool for on-site detection and screening of ibuprofen in water and herbal tea.
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Affiliation(s)
- Shaozhen Li
- State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China.
| | - Wenliang Ge
- Wuxi No. 2 People's Hospital, Wuxi, 214002, Jiangsu, People's Republic of China.
| | - Steven Suryoprabowo
- State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China.
| | - Jie Liu
- State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China.
| | - Hua Kuang
- State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China.
| | - Jianping Zhu
- State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China.
| | - Liqiang Liu
- State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China.
| | - Chuanlai Xu
- State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China.
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13
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Sadeghi S, Rahaie M, Ostad-Hasanzadeh B. Nanostructures in non-invasive prenatal genetic screening. Biomed Eng Lett 2021; 12:3-18. [DOI: 10.1007/s13534-021-00208-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 08/22/2021] [Accepted: 10/02/2021] [Indexed: 11/24/2022] Open
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14
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Abdelrazig AO, Tran BT, Rijiravanich P, Surareungchai W. A new and high-performance microfluidic analytical device based on Fusion 5 paper for the detection of chili pepper anthracnose pathogen Colletotrichum truncatum. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:3764-3771. [PMID: 34346407 DOI: 10.1039/d1ay00945a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
A microfluidic analytical device based on wax-patterned Fusion 5 paper was designed and fabricated to facilitate early detection and improve control of anthracnose disease. Here, a rapid, specific, on-site, and low operational cost nucleic acid biosensor (ACT-Ct-PAD) based on the actin gene (ACT) and wax-patterned Fusion 5 paper was used to detect the PCR products of Colletotrichum truncatum (Ct), the main causal agent of chili anthracnose in Asia. The sensor was developed by using DNA conjugated gold nanoparticles (AuNPs-DNA) as a detection probe, which will hybridize to a complementary target sequence. Avidin coated mesoporous silica particles were attached to biotin-tagged DNA sequences forming capture probes, which were immobilized on the test and control zones of the device. The hybridization complex (MSP-dsDNA-AuNPs) produces an intense red color, which provides a platform for colorimetric detection. By targeting an actin gene sequence, the ACT-Ct-PAD device allows the detection of Ct DNA within 15 min. The specificity of the sensor was confirmed by the absence of a positive signal for DNA from non-target Colletotrichum species and two different fungal genera. Our wax-patterned Fusion 5 sensor provides a simple tool for the rapid nucleic acid diagnosis with a detection limit down to 17.42 femtomoles. This method has the potential to be applied for protein assay as well; hence, it has a considerable impact on on-site diagnostics.
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Affiliation(s)
- Amir Osman Abdelrazig
- School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, Bang Khun Thian, Bangkok 10150, Thailand
| | - Bao Thai Tran
- School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, Bang Khun Thian, Bangkok 10150, Thailand
| | - Patsamon Rijiravanich
- BioSciences and Systems Biology Research Team, National Center for Genetic Engineering and Biotechnology, National Sciences and Technology Development Agency at King Mongkut's University of Technology Thonburi, Bang Khun Thian, Bangkok 10150, Thailand.
| | - Werasak Surareungchai
- School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, Bang Khun Thian, Bangkok 10150, Thailand
- Nanoscience and Nanotechnology Graduated Research Program, Faculty of Science, King Mongkut's University of Technology Thonburi, Bangmod, Bangkok 10140, Thailand.
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15
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Marahel F, Niknam L. Enhanced fluorescent sensing probe via PbS quantum dots functionalized with gelatin for sensitive determination of toxic bentazon in water samples. Drug Chem Toxicol 2021; 45:2545-2553. [PMID: 34384317 DOI: 10.1080/01480545.2021.1963761] [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] [Indexed: 10/20/2022]
Abstract
Fluorescent chemical sensors to detect materials, by increasing fluorescence emission and absorption or by shutting down, because they are nondestructive, the ability to show decomposed concentrations, fast response, high accuracy have been considered and used. In this research, a chemical sensor was synthesized PbS functionalized with gelatin quantum dots for the determination of toxic bentazon (BTZN) one of the most problematic pesticides polluting in water samples, and extremely harmful to humans and animals even at low concentrations. The calibration curve was linear in the range of (0.05 to 200.0 ng mL-1). The current response was linearly proportional to the BTZN concentration with a R2∼ 0.999. The standard deviation of less than (3%), and detection limits (3S/m) of the method (0.5 ng mL-1, in time 50 s, 325 nm) were obtained for sensor level response PbS Quantum Dot-Gelatin nanocomposites sensor with (99%) which is below the U.S. Health Advisory level. The observed outcomes confirmed the suitability recovery and a very low detection limit for measuring the BTZN. The method fluorometric introduced to measure BTZN in water samples was used and can be used for in different intricate matrices, the chemical PbS Quantum Dot-Gelatin nanocomposites sensor made it possible as an excellent sensor with good reproducibility.
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Affiliation(s)
- Farzaneh Marahel
- Department of Chemistry, Omidiyeh Branch, Islamic Azad University, Omidiyeh, Iran
| | - Leila Niknam
- Department of Chemistry, Omidiyeh Branch, Islamic Azad University, Omidiyeh, Iran
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16
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Qiao Z, Cai Q, Fu Y, Lei C, Yang W. Visual and quantitative detection of E. coli O157:H7 by coupling immunomagnetic separation and quantum dot-based paper strip. Anal Bioanal Chem 2021; 413:4417-4426. [PMID: 34013400 DOI: 10.1007/s00216-021-03395-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 04/21/2021] [Accepted: 05/06/2021] [Indexed: 10/21/2022]
Abstract
Simple and visual quantitative detection of foodborne pathogens can effectively reduce the outbreaks of foodborne diseases. Herein, we developed a simple and sensitive quantum dot (QD)-based paper device for visual and quantitative detection of Escherichia coli (E. coli) O157:H7 based on immunomagnetic separation and nanoparticle dissolution-triggered signal amplification. In this study, E. coli O157:H7 was magnetically separated and labeled with silver nanoparticles (AgNPs), and the AgNP labels can be converted into millions of Ag ions, which subsequently quench the fluorescence of QDs in the paper strip, which along with the readout can be visualized and quantified by the change in length of fluorescent quenched band. Owing to the high capture efficiency and effective signal amplification, as low as 500 cfu mL-1 of E. coli O157:H7 could be easily detected by naked eyes. Furthermore, this novel platform was successfully applied to detect E. coli O157:H7 in spiked milk samples with good accuracy, indicating its potential in the detection of foodborne pathogens in real samples.
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Affiliation(s)
- Zhaohui Qiao
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, 315800, Zhejiang, China
| | - Qiqi Cai
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, 315800, Zhejiang, China
| | - Yingchun Fu
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Chunyang Lei
- State Key Laboratory of Chem/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, Zhejiang, China.
| | - Wenge Yang
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, 315800, Zhejiang, China.
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Liao X, Wang X, Zhang M, Mei L, Chen S, Qi Y, Hong C. An immunosensor based on an electrochemical-chemical-chemical advanced redox cycle amplification strategy for the ultrasensitive determination of CEA. Anal Chim Acta 2021; 1170:338647. [DOI: 10.1016/j.aca.2021.338647] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 05/01/2021] [Accepted: 05/12/2021] [Indexed: 11/26/2022]
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Chu H, Yao D, Chen J, Yu M, Su L. Detection of Hg 2+ by a Dual-Fluorescence Ratio Probe Constructed with Rare-Earth-Element-Doped Cadmium Telluride Quantum Dots and Fluorescent Carbon Dots. ACS OMEGA 2021; 6:10735-10744. [PMID: 34056227 PMCID: PMC8153792 DOI: 10.1021/acsomega.1c00263] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Accepted: 04/02/2021] [Indexed: 05/06/2023]
Abstract
Quantum dots (QDs) and carbon quantum dots (CDs) are classes of zero-dimensional materials whose sizes can be ≤10 nm. They exhibit excellent optical properties and are widely used to prepare fluorescent probes for qualitative and quantitative detection of test objects. In this article, we used cerium chloride as the cerium source and used the in situ doped cerium (rare-earth element) to develop cadmium telluride (CdTe) quantum dots following the aqueous phase method. CdTe: Ce quantum dots were successfully synthesized. The solution of CdTe:Ce QDs was mixed with the CD solution prepared following the green microwave method to form a ratio fluorescence sensor that can be potentially used for the selective detection of mercury ions (Hg2+). We used transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, and other microscopy and spectral characterization techniques to validate that Ce had been successfully doped. The test results on the fluorescence performance revealed that Ce doping enhances the predoped fluorescence performance of the CdTe QDs. We have quantitatively detected Hg2+ using a ratiometric fluorescence sensor to show that in the range of 10-60 nM, the fluorescence quenching efficiency increases linearly with the increase in Hg2+ concentration. The linear correlation coefficient R 2 = 0.9978, and its detection limit was found to be 2.63 nM L-1. It was observed that other interfering ions do not significantly affect the fluorescence intensity of the probe. According to the results of the blank addition experiment, the developed proportional fluorescence probe can be used for the detection of Hg2+ in actual samples.
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Farshchi F, Saadati A, Fathi N, Hasanzadeh M, Samiei M. Flexible paper-based label-free electrochemical biosensor for the monitoring of miRNA-21 using core-shell Ag@Au/GQD nano-ink: a new platform for the accurate and rapid analysis by low cost lab-on-paper technology. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:1286-1294. [PMID: 33624680 DOI: 10.1039/d1ay00142f] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
miRNA-21 is one of the most famous and prominent microRNAs that is important in the development and emergence of cancers. So, the sensitive and selective monitoring of miRNA-21 as a very common biomarker in cancer treatment is necessary. In this work, a novel paper-based electrochemical peptide nucleic acid (PNA) sensor was developed for the detection of miRNA-21 in human plasma samples by using Ag@Au core-shell nanoparticles electrodeposited on graphene quantum dots (GQD) conductive nano-ink (Ag@Au core-shell/GQD nano-ink), which was designed directly by writing pen-on paper technology on the surface of photographic paper. This nano-ink has a great surface area for biomarker immobilization. The prepared paper-based biosensor is very small and cheap, and also has high stability and sensitivity. Hybridization of PNA was measured using various electrochemical techniques, such as cyclic voltammetry (CV), square wave voltammetry (SWV) and chronoamperometry (ChA). FE-SEM (Field Scanning Electron Microscope), TEM (Transmission Electron Microscope), EDS and DLS (Dynamic Light Scattering) tests were performed to identify the engineering safety sensor. Under optimal conditions, the linear range for the calibration curve was from 5 pM to 5 μM, and the achieved LLOQ was 5 pM. The obtained results recommended that the proposed bioassay might be suitable for an early diagnosis of cancer based on the inhibition of the expression of miRNA-21, which activates the enzyme caspase and accelerates apoptotic proteins and death in tumor cells.
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Affiliation(s)
- Fatemeh Farshchi
- Pharmaceutical Analysis Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
| | - Arezoo Saadati
- Food and Drug Safety Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Nazanin Fathi
- Research Center for Immunodeficiencies, Pediatrics Center of Excellence, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Hasanzadeh
- Pharmaceutical Analysis Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
| | - Mohammad Samiei
- Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran.
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Hottechamps J, Noblet T, Erard M, Dreesen L. Quenched or alive quantum dots: The leading roles of ligand adsorption and photoinduced protonation. J Colloid Interface Sci 2021; 594:245-253. [PMID: 33765644 DOI: 10.1016/j.jcis.2021.02.116] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 02/23/2021] [Accepted: 02/25/2021] [Indexed: 10/22/2022]
Abstract
HYPOTHESIS The fluorescence emission of water-soluble CdTe quantum dots (QDs) capped with mercaptocarboxylic acids (MCAs) is known to be pH-dependent. However, this behaviour is quite different from a study to another, so that literature suffers from a lack of coherence. Here we assume that the QD fluorescence efficiency is actually driven by the acid-base equilibrium of MCA thiol groups, and that light-excited QDs open a non-radiative relaxation path through photoinduced protonation. EXPERIMENTS We address this issue by examining colloidal CdTe QDs with (time-resolved) fluorescence spectroscopy under various conditions of acidity and light excitation. FINDINGS It appears that the emission of QDs is quenched below a critical pH value of 6.87, and that light excitation power strengthens this quenching. We thus demonstrate the existence of an additional photochemical process and developed a mathematical modeling accounting for all our experimental results. With only three parameters, it is possible to accurately predict the fluorescence decay of QDs over time, at any pH. Further, we also related the critical pH value of 6.87 to QD surface properties, explaining why observations may differ from a study to another and making the literature much more coherent.
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Affiliation(s)
- Julie Hottechamps
- GRASP-Biophotonics, CESAM, University of Liege, Institute of Physics, Allée du 6 août 17, 4000 Liège, Belgium
| | - Thomas Noblet
- GRASP-Biophotonics, CESAM, University of Liege, Institute of Physics, Allée du 6 août 17, 4000 Liège, Belgium
| | - Marie Erard
- Université Paris-Saclay, CNRS, Institut de Chimie Physique, UMR 8000, 91405 Orsay, France
| | - Laurent Dreesen
- GRASP-Biophotonics, CESAM, University of Liege, Institute of Physics, Allée du 6 août 17, 4000 Liège, Belgium.
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21
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Zhu N, Li G, Zhou J, Zhang Y, Kang K, Ying B, Yi Q, Wu Y. A light-up fluorescence resonance energy transfer magnetic aptamer-sensor for ultra-sensitive lung cancer exosome detection. J Mater Chem B 2021; 9:2483-2493. [PMID: 33656037 DOI: 10.1039/d1tb00046b] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
In vitro liquid biopsy based on exosomes offers promising opportunities for fast and reliable detection of lung cancers. In this work, we present a fluorescence resonance energy transfer (FRET) magnetic aptamer-sensor for magnetic enrichment of exosomes with aptamers and detection of cancerous-surface proteins based on a light-up FRET strategy. Fluorescent quantum dots (QDs) and aptamers were introduced onto magnetic nanoparticles and the fluorescence emission turned down when the aptamers were paired with their complementary DNA on the surface of Au nanoparticles. Later, competitive binding of exosomes with the aptamers expelled the Au nanoparticles resulting in an exosome concentration-dependent linear increase of QD fluorescence intensity in a broad exosome concentration range (5 × 102-5 × 109 particles per mL). As found in our work, this system behaved ultra-sensitively and the calculated detection limit of this FRET magnetic aptamer-sensor was as low as 13 particles per mL. Furthermore, taking epithelial cancer-specific antigen (epithelial cell adhesion molecule, EpCAM) screening as a typical example, our built FRET magnetic aptamer-sensor allowed a rapid and efficient distinction of all the epithelial cancer cases (7 lung cancers and 5 other cancers) from health volunteers with 100% accuracy.
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Affiliation(s)
- Nanhang Zhu
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, P. R. China.
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22
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Kokorina AA, Ponomaryova TS, Goryacheva IY. Photoluminescence-based immunochemical methods for determination of C-reactive protein and procalcitonin. Talanta 2021; 224:121837. [PMID: 33379055 DOI: 10.1016/j.talanta.2020.121837] [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: 09/11/2020] [Revised: 10/26/2020] [Accepted: 10/28/2020] [Indexed: 12/16/2022]
Abstract
Modern, sensitive, rapid, and selective analytical methods for the detection of inflammatory markers are a crucial tool for the assessment of inflammation state, efficacy of medical intervention, and the prediction of future diseases. Their development requires understanding of current state for point-of-care testing of inflammatory markers and identification of their crucial drawbacks. This review summarizes the progress in the application of luminescent labels for immunoassays. The luminescent labels became more popular in the latest decade due to their high sensitivity, selectivity, and robustness. This review presents a constructive analysis of different luminescent labels such as fluorescent organic dyes, quantum dots, long-lived emissive nanoparticles, and up-converting nanocrystals, as well as a range of the strategies for inflammatory markers determination. The advantages and disadvantages of all classes of luminescent labels are demonstrated, and the strategies of labels modification for their improvement are discussed. The current approaches for the creation of luminescent probes and robust assays are also highlighted.
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Affiliation(s)
- Alina A Kokorina
- Saratov State University, Astrakhanskaya Street 83, 410012, Saratov, Russia.
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23
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Tufani A, Qureshi A, Niazi JH. Iron oxide nanoparticles based magnetic luminescent quantum dots (MQDs) synthesis and biomedical/biological applications: A review. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 118:111545. [DOI: 10.1016/j.msec.2020.111545] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 09/11/2020] [Accepted: 09/20/2020] [Indexed: 12/20/2022]
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24
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Chang H, Kim J, Lee SH, Rho WY, Lee JH, Jeong DH, Jun BH. Luminescent Nanomaterials (II). ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1309:97-132. [PMID: 33782870 DOI: 10.1007/978-981-33-6158-4_5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
In this review, we focus on sensing techniques and biological applications of various luminescent nanoparticles including quantum dot (QD), up-conversion nanoparticles (UCNPs) following the previous chapter. Fluorescent phenomena can be regulated or shifted by interaction between biological targets and luminescence probes depending on their distance, which is so-called Fӧrster resonance energy transfer (FRET). QD-based FRET technique, which has been widely applied as a bioanalytical tool, is described. We discuss time-resolved fluorescence (TRF) imaging and flow cytometry technique, using photoluminescent nanoparticles with unique properties for effectively improving selectivity and sensitivity. Based on these techniques, bioanalytical and biomedical application, bioimaging with QD, UCNPs, and Euripium-activated luminescent nanoprobes are covered. Combination of optical property of these luminescent nanoparticles with special functions such as drug delivery, photothermal therapy (PTT), and photodynamic therapy (PDT) is also described.
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Affiliation(s)
- Hyejin Chang
- Division of Science Education, Kangwon National University, Chuncheon, Republic of Korea
| | - Jaehi Kim
- Department of Bioscience and Biotechnology, Konkuk University, Seoul, South Korea
| | - Sang Hun Lee
- Department of Chemical and Biological Engineering, Hanbat National University, Daejeon, Republic of Korea
| | - Won-Yeop Rho
- School of International Engineering and Science, Jeonbuk National University, Jeonju, Republic of Korea
| | - Jong Hun Lee
- Department of Food Science and Biotechnology, Gachon University, Seongnam, Republic of Korea
| | - Dae Hong Jeong
- Department of Chemistry Education, Seoul National University, Seoul, Republic of Korea
| | - Bong-Hyun Jun
- Department of Bioscience and Biotechnology, Konkuk University, Seoul, South Korea.
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Hu P, Wang X, Wei L, Dai R, Yuan X, Huang K, Chen P. Selective recognition of CdTe QDs and strand displacement signal amplification-assisted label-free and homogeneous fluorescence assay of nucleic acid and protein. J Mater Chem B 2020; 7:4778-4783. [PMID: 31389950 DOI: 10.1039/c9tb00753a] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Due to their simplicity of design and operation, homogeneous bioassays have been of great interest to researchers. Herein, a label-free and free separation fluorescence sensing platform was constructed for the determination of nucleic acid and prostate specific antigen (PSA) using CdTe QDs as the signal molecule. In our previous work, we surprisingly found that the CdTe QDs can selectively distinguish Ag+ and the C-Ag+-C complex, which was the basis of the sensor. On the basis of the selective cation exchange reaction (CER), combined with the signal amplification of the strand displacement reaction (SDR), this work was first applied for the sensitive analysis of DNA. There are two types of hairpin structures in this sensing system, including the recognition probe (HP) and Ag+, which formed the C-Ag+-C structure, and the hairpin structure formed by the helper DNA itself. In this work, target DNA can trigger the SDR that generates lots of HP-helper double-stranded DNA (dsDNA) and recycles the target DNA while releasing a large amount of Ag+, thus quenching the fluorescence signal of CdTe QDs to achieve the highly sensitive detection of DNA. In order to verify the versatility of this system using DNA as a bridge and aptamers as recognition probes, we extended the system to the detection of PSA. After examining its experimental performance, it was determined that this method displayed good analytical capability for DNA in the range of 10-13-10-10 M and PSA in the range of 10-13-10-10 g mL-1 with low 25 fM and 30 fg mL-1 limits of detection (LODs), respectively; high selectivity for both the target sequence and protein was shown. In addition, this platform was successfully used for the analysis of PSA in serum samples.
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Affiliation(s)
- Pingyue Hu
- College of Chemistry and Material Science, Sichuan Normal University, Chengdu, Sichuan 610068, China.
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26
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Díaz-Amaya S, Zhao M, Allebach JP, Chiu GTC, Stanciu LA. Ionic Strength Influences on Biofunctional Au-Decorated Microparticles for Enhanced Performance in Multiplexed Colorimetric Sensors. ACS APPLIED MATERIALS & INTERFACES 2020; 12:32397-32409. [PMID: 32645268 DOI: 10.1021/acsami.0c07636] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The rising development of biosensors offers a great potential for health, food, and environmental monitoring. However, in many colorimetric platforms, there is a performance limitation stemming from the tendency of traditional Au nanoparticles toward nonspecific aggregation in response to changing ionic strength (salt concentration). This work puts forward a new type of colorimetric aptamer-functionalized labeling of microparticles, which allows to leverage an increase in ionic strength as a positive driver of enhanced detection performance of analytical targets. The resulting device is a cost-effective, instrument-free, portable, and reliable aptasensor that serves as basis for the fabrication of universal paper-based colorimetric platforms with the capability of multiplex, multireplicates and provides quantitative colorimetric detection. A controlled fabrication process was demonstrated by keeping 90% of the signal obtained from the as-fabricated devices (n = 40) within ± 1 standard deviation (SD) (relative SD = 5.69%) and following a mesokurtic normal-like distribution (p = 0.385). We propose for the first time a salt-induced aggregation mechanism for highly stable multilayered label particles (ssDNA-PEI-Au-PS) as the basis of the detection scheme. The use of DNA aptamers as capture biomolecules and PEI as an encapsulating agent allows for a sensitive and highly specific colorimetric response. As a proof of concept, multiplexed detection of mercury (Hg2+) and arsenic (As3+) was demonstrated. In addition, we introduced a robust image analysis algorithm for testing zone segmentation and color signal quantification that allowed for analytical detection, reaching a limit of detection of 1 ppm for both targeted analytes, with enough evidence (p > 0.05) to prove the high specificity of the fabricated device versus a pool of possible interferent ions.
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Affiliation(s)
- Susana Díaz-Amaya
- Department of Materials Engineering, Purdue University. West Lafayette, Indiana 47907, United States
- Birck Nanotechnology Center, Purdue University. West Lafayette, Indiana 47907, United States
| | - Min Zhao
- School of Electrical and Computer Engineering, Purdue University. West Lafayette, Indiana 47907, United States
| | - Jan P Allebach
- School of Electrical and Computer Engineering, Purdue University. West Lafayette, Indiana 47907, United States
| | - George T-C Chiu
- School of Electrical and Computer Engineering, Purdue University. West Lafayette, Indiana 47907, United States
- School of Mechanical Engineering, Purdue University. West Lafayette, Indiana 47907, United States
| | - Lia A Stanciu
- Department of Materials Engineering, Purdue University. West Lafayette, Indiana 47907, United States
- Birck Nanotechnology Center, Purdue University. West Lafayette, Indiana 47907, United States
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27
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Sustainable materials for the design of forefront printed (bio)sensors applied in agrifood sector. Trends Analyt Chem 2020. [DOI: 10.1016/j.trac.2020.115909] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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28
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Speranskaya ES, Drozd DD, Pidenko PS, Goryacheva IY. Enzyme modulation of quantum dot luminescence: Application in bioanalysis. Trends Analyt Chem 2020. [DOI: 10.1016/j.trac.2020.115897] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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29
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Naqvi S, Anwer H, Ahmed SW, Siddiqui A, Shah MR, Khaliq S, Ahmed A, Ali SA. Synthesis and characterization of maltol capped silver nanoparticles and their potential application as an antimicrobial agent and colorimetric sensor for cysteine. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 229:118002. [PMID: 31923785 DOI: 10.1016/j.saa.2019.118002] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 12/26/2019] [Accepted: 12/26/2019] [Indexed: 06/10/2023]
Abstract
Maltol capped silver nanoparticles (McAgNPs) were synthesized using maltol (3-hydroxy-2-methyl-4-pyrone) as reducing and capping agent. McAgNPs were characterized by Visible and FTIR (Fourier transform infrared) spectroscopy, dynamic light scattering (DLS), and atomic force microscopy (AFM). Bright yellow color McAgNPs showed surface plasmon resonance (SPR) band at 436 nm, spherical shape and the average size between 35 to 50 nm. McAgNPs revealed higher stability against varying storage time, temperature, pH and salt concentrations. McAgNPs were successfully utilized for the selective and highly sensitive colorimetric detection of cysteine (Cys). Addition of Cys in a solution of McAgNPs, resulted a rapid change in color from yellow to orange because of the formation of nanoaggregates as confirmed by Visible/FTIR spectroscopy, DLS, and AFM studies. The estimated limit of detection (0.043 μM) was found to be more sensitive than previously reported other optical methods. The practical applicability of probe was also established by spiking the known concentrations of Cys in biological (blood plasma and urine) and environmental (tap and lake water) samples with significant recovery rates (92-104.6%). Despite being nontoxic to various tested cell lines, McAgNPs demonstrated potent antimicrobial, antibiofilm, and biofilm eradicating activities, thus potentially valuable in diagnostics and/or the synthesis of other nanocomposite material for broader applications.
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Affiliation(s)
- Sumra Naqvi
- Department of Chemistry, Federal Urdu University Art, Science & Technology, Gulshan-e-Iqbal Campus, Karachi 75300, Pakistan
| | - Humera Anwer
- Department of Chemistry, Federal Urdu University Art, Science & Technology, Gulshan-e-Iqbal Campus, Karachi 75300, Pakistan
| | - Syed Waseem Ahmed
- Department of Chemistry, Federal Urdu University Art, Science & Technology, Gulshan-e-Iqbal Campus, Karachi 75300, Pakistan; H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences (ICCBS), University of Karachi, Karachi 75270, Pakistan
| | - Asma Siddiqui
- Department of Chemistry, Federal Urdu University Art, Science & Technology, Gulshan-e-Iqbal Campus, Karachi 75300, Pakistan
| | - Muhammad Raza Shah
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences (ICCBS), University of Karachi, Karachi 75270, Pakistan
| | - Saima Khaliq
- Department of Biochemistry, Federal Urdu University Art, Science & Technology, Gulshan-e-Iqbal Campus, Karachi 75300, Pakistan
| | - Ayaz Ahmed
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences (ICCBS), University of Karachi, Karachi 75270, Pakistan
| | - Syed Abid Ali
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences (ICCBS), University of Karachi, Karachi 75270, Pakistan.
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Xu J, Zhang B, Jia L, Bi N, Zhao T. Metal-enhanced fluorescence detection and degradation of tetracycline by silver nanoparticle-encapsulated halloysite nano-lumen. JOURNAL OF HAZARDOUS MATERIALS 2020; 386:121630. [PMID: 31744725 DOI: 10.1016/j.jhazmat.2019.121630] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 10/28/2019] [Accepted: 11/05/2019] [Indexed: 06/10/2023]
Abstract
The ultrasensitive detection and efficient degradation of tetracycline (TC) residues are important for improving food safety and protecting human health. In this paper, a smart silver-enhanced fluorescence platform for the ultrasensitive detection of TC was constructed via a simple and selective modification of the interior and external tubes of natural halloysite nanotubes. The thick pipe wall of this platform provides a natural defense and promotes metal-enhanced fluorescence effects, which subsequently accelerates the detection of TC. Moreover, the nanoplatform of the modified Ag nanoparticles can induce the separation of electrons and holes, thereby enhancing photocatalytic activity in TC degradation. This platform provides new opportunities for studying natural halloysite nanotubes and for simultaneously detecting and photodegrading other deleterious substances.
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Affiliation(s)
- Jun Xu
- College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, Henan, 454000, China
| | - Beibei Zhang
- College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, Henan, 454000, China
| | - Lei Jia
- College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, Henan, 454000, China.
| | - Ning Bi
- College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, Henan, 454000, China
| | - Tongqian Zhao
- Institute of Resources & Environment, Henan Polytechnic University, Jiaozuo, Henan, 454000, China.
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31
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Enzyme-induced Fenton reaction coupling oxidation of o-phenylenediamine for sensitive and specific immunoassay. J Solid State Electrochem 2020. [DOI: 10.1007/s10008-020-04499-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Paper-based point-of-care immunoassays: Recent advances and emerging trends. Biotechnol Adv 2020; 39:107442. [DOI: 10.1016/j.biotechadv.2019.107442] [Citation(s) in RCA: 95] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Revised: 07/04/2019] [Accepted: 08/26/2019] [Indexed: 01/23/2023]
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33
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Li C, Shao C, Li L, Liu X, Liu M. In situ fabrication of a luminescent copper nanocluster/eggshell membrane composite and its application in visual detection of Ag + ions, light-emitting diodes and surface patterning. Photochem Photobiol Sci 2019; 18:2942-2951. [PMID: 31746925 DOI: 10.1039/c9pp00166b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
In this work, we report a novel strategy for fabricating a luminescent 2D nanocomposite at room temperature by in situ generation of luminescent copper nanoclusters (Cu NCs) embedded in natural monolithic eggshell membrane (ESM) using dithiothreitol as the reducing and capping agent. The established fabrication is facile, cost-effective and viable. The as-prepared Cu NC/ESM nanocomposite exhibited excellent photoluminescence performance, improved chemical, thermal and photo stability, convenient tailoring and flexibility. Significantly, the nanocomposites could be employed as test strips for the visual detection of Ag+ ions based on the luminescence quenching phenomenon and as color conversion layers in light-emitting diodes. Furthermore, application of the proposed strategy for surface luminescence patterning was well demonstrated, indicating great potential in biomass based anti-counterfeiting, information encryption and security paper or sheets.
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Affiliation(s)
- Chunbo Li
- College of Chemistry and Materials Science, Information College, Huaibei Normal University, Huaibei, Anhui 235000, China.
| | - Congying Shao
- College of Chemistry and Materials Science, Information College, Huaibei Normal University, Huaibei, Anhui 235000, China.
| | - Lu Li
- College of Chemistry and Materials Science, Information College, Huaibei Normal University, Huaibei, Anhui 235000, China.
| | - Xianhu Liu
- College of Chemistry and Materials Science, Information College, Huaibei Normal University, Huaibei, Anhui 235000, China.
| | - Mingzhu Liu
- College of Chemistry and Materials Science, Information College, Huaibei Normal University, Huaibei, Anhui 235000, China.
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34
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Lin X, Wang Y, Wang L, Lu Y, Li J, Lu D, Zhou T, Huang Z, Huang J, Huang H, Qiu S, Chen R, Lin D, Feng S. Interference-free and high precision biosensor based on surface enhanced Raman spectroscopy integrated with surface molecularly imprinted polymer technology for tumor biomarker detection in human blood. Biosens Bioelectron 2019; 143:111599. [DOI: 10.1016/j.bios.2019.111599] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 08/06/2019] [Accepted: 08/13/2019] [Indexed: 12/28/2022]
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Chen P, Yan S, Sawyer E, Ying B, Wei X, Wu Z, Geng J. Rapid and simple detection of ascorbic acid and alkaline phosphatase via controlled generation of silver nanoparticles and selective recognition. Analyst 2019; 144:1147-1152. [PMID: 30534723 DOI: 10.1039/c8an01925h] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Ascorbic acid (AA) and alkaline phosphatase (ALP) serve as an important coenzyme and enzyme in multiple biological metabolism reactions, respectively, and abnormal levels of these substrates have been associated with several diseases. Herein, a new and simple fluorescence strategy has been developed for AA and ALP sensing by exploiting CdTe quantum dots (QDs) as an effective signal indicator. This method is mainly based on the selective fluorescence-quenching reaction between Ag+ and CdTe QDs, as opposed to silver nanoparticles (Ag NPs); Ag+ can be reduced to Ag NPs by AA. Furthermore, by taking advantage of AA as a mediator, this strategy is further exploited for ALP assay given that ALP can cause the hydrolysis of l-ascorbic acid-2-phosphate (AAP), which yields AA. Under optimal conditions, controlled generation of Ag NPs and the selective recognition-based sensing system exhibit high sensitivity toward AA and ALP with limits of detection (LODs) of 3 μM and 0.25 U L-1 and linear ranges of detection from 0 to 800 μM and 1 to 1000 U L-1, respectively. Moreover, the sensor was successfully used for assaying AA in fruit juice and ALP in human serum. The results demonstrate that the proposed fluorescence strategy has significant advantages, such as its simplicity, cost-effectiveness, and rapid runtime, and the operational convenience of this label-free method further demonstrates its potential for constructing effective sensors with biochemical and clinical applications.
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Affiliation(s)
- Piaopiao Chen
- Department of Laboratory Medicine, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, Sichuan 610041, China.
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36
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Ganganboina AB, Doong RA. Graphene Quantum Dots Decorated Gold-Polyaniline Nanowire for Impedimetric Detection of Carcinoembryonic Antigen. Sci Rep 2019; 9:7214. [PMID: 31076624 PMCID: PMC6510894 DOI: 10.1038/s41598-019-43740-3] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Accepted: 04/30/2019] [Indexed: 01/13/2023] Open
Abstract
A label-free impedimetric immunosensor based on N, S-graphene quantum dots@Au-polyaniline (N, S-GQDs@Au-PANI) nanowires was fabricated for the quantitative detection of carcinoembryonic antigen (CEA). The N, S-GQDs and Au-PANI were synthesized by a simple hydrothermal pyrolysis and interfacial polymerization, respectively. Subsequently, 2-9 nm N, S-GQDs are successfully decorated onto 30-50 nm Au-PANI nanowires by Au-thiol linkage to serve as the bifunctional probe for amplifying the electrochemical activity as well as anchoring anti-CEA. The N, S-GQDs@Au-PANI nanowires are excellent conducting materials to accelerate the electron transfer, while the formation of CEA antibody-antigen bioconjugates after the addition of CEA significantly increase the charge transfer resistance, and subsequently provides a highly stable and label-free immunoassay platform for the impedimetric detection of CEA. The label-free immunosensor exhibits a wide linear range from 0.5 to 1000 ng mL-1 with a low detection limit of 0.01 ng mL-1. The N, S-GQDs@Au-PANI based immunosensor also shows high selectivity and stability over other cancer makers and amino acids. Moreover, this promising platform is successfully applied to the detection of CEA in human serum samples with excellent recovery of (96.0 ± 2.6)-(103 ± 3.8)%. These results clearly demonstrate a newly developed highly efficient and label-free impedimetric immunosensor for the detection of CEA using N, S-GQDs@Au-PANI nanowires as the biosensing probe, which can pave the gateway for the fabrication of high performance and robust impedimetric immunosensor to detect cancer makers in early stage of cancer diagnosis and therapy.
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Affiliation(s)
- Akhilesh Babu Ganganboina
- Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, 101, Section 2, Kuang Fu Road, Hsinchu, 30013, Taiwan
| | - Ruey-An Doong
- Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, 101, Section 2, Kuang Fu Road, Hsinchu, 30013, Taiwan.
- Institute of Environmental Engineering, National Chiao Tung University, 1001 University Road, Hsinchu, 30010, Taiwan.
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Chen G, Feng H, Xi W, Xu J, Pan S, Qian Z. Thiol-ene click reaction-induced fluorescence enhancement by altering the radiative rate for assaying butyrylcholinesterase activity. Analyst 2019; 144:559-566. [PMID: 30417195 DOI: 10.1039/c8an01808a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Butyrylcholinesterase (BChE) generally acts as an important plasma biomarker for clinical diagnosis due to its major contribution to human plasma cholinesterase levels, but its current fluorometric assay relying on fluorogenic substrates frequently suffers from the lack of sufficiently fast response time and specific recognition of substrates relative to the traditional Ellman's method. In this work, we report a fluorescent molecular probe for assaying BChE activity based on thiol-triggered fluorescence enhancement via thiol-ene click reactions. A low-temperature experiment and theoretical analysis exclude the possibility of weak fluorescence of the probe caused by an intramolecular photoinduced electron transfer process and support the main cause of an ultraslow radiative rate due to the introduction of two acrylyl groups. This probe has sensitive fluorescence responses to thiols via thiol-ene click chemistry, and it can distinguish between glutathione and cysteine or homocysteine in different emission colors. The rapid reaction kinetics of this probe enables it to monitor hydrolysis reactions catalyzed by butyrylcholinesterase (BChE) in a real-time manner. This probe is used to develop the first fluorometric assay of BChE activity based on fluorescence enhancement triggered by thiol-ene click chemistry using butyrylthiocholine as the substrate. The established BChE assay shows excellent sensitivity, and is capable of avoiding the interference from glutathione and acetylcholinesterase (AChE) in a complex matrix. The inhibition test of tacrine on BChE with this assay substantiates its feasibility in screening potential inhibitors of BChE. This work demonstrates a design strategy of fluorescent probes lighted up by thiol-ene click reactions, reveals the main cause of thiol-triggered fluorescence enhancement by altering the radiative rate, and provides the first fluorometric assay of BChE based on rapid thiol-ene click reactions.
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Affiliation(s)
- Guilin Chen
- College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, China.
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38
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Hu Q, Wei Q, Zhang P, Li S, Xue L, Yang R, Wang C, Zhou L. An up-converting phosphor technology-based lateral flow assay for point-of-collection detection of morphine and methamphetamine in saliva. Analyst 2019; 143:4646-4654. [PMID: 30168551 DOI: 10.1039/c8an00651b] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Morphine (Mop) and methamphetamine (Met) are highly addictive drugs worldwide. Point-of-collection testing (POCT) for drug-of-abuse screening is important in abuse/rehabilitation clinics and law-enforcement agencies. We established an up-converting phosphor technology-based lateral flow assay (UPT-LFA) as a point-of-collection testing (POCT) method, namely Mop-UPT-LFA and Met-UPT-LFA, for the detection of morphine and methamphetamine without complicated sample pre-treatment, respectively, in saliva. The sensitivities of the Mop-UPT-LFA and the Met-UPT-LFA were 5 and 10 ng mL-1 with accurate quantitation of 5-100 ng mL-1 and 10-250 ng mL-1 for morphine and methamphetamine, respectively, for a detection time of 15 min. In reference to the detection limits of 20 and 25 ng mL-1 for morphine and methamphetamine, respectively, in the Driving Under the Influence of Drugs, Alcohol and Medicines (DRUID) program of the European Union, the percentage test/control (T/C) ratio of the UPT-LFA between 2 and 15 min reached 101% and 86%, and the UPT-LFA produced accurate qualitative results in 2 min for 100 simulated-saliva samples with the exception of a few weakly positive samples. The sample and sample treating buffer were mixed and added to the test strip, and the test was conducted 15 min later. Although we found no significant difference between the UPT-LFA quantitative test and the liquid chromatography tandem mass spectrometry (LC-MS) test, compared with the latter, the UPT-LFA was substantially faster and had higher detection efficiency. The UPT-LFA showed more accurate qualitative results than the LC-MS for 50 simulated-saliva samples. The ease of operation, high sensitivity, and accuracy of the UPT-LFA make it a valid candidate POCT method for drug-of-abuse screening.
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Affiliation(s)
- Qiushi Hu
- National Key Laboratory of Biochemical Engineering, PLA Key Laboratory of Biopharmaceutical Production & Formulation Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.
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39
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Chen Y, Wang AJ, Yuan PX, Luo X, Xue Y, Feng JJ. Three dimensional sea-urchin-like PdAuCu nanocrystals/ferrocene-grafted-polylysine as an efficient probe to amplify the electrochemical signals for ultrasensitive immunoassay of carcinoembryonic antigen. Biosens Bioelectron 2019; 132:294-301. [PMID: 30884316 DOI: 10.1016/j.bios.2019.02.057] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 02/16/2019] [Accepted: 02/18/2019] [Indexed: 11/29/2022]
Abstract
A novel sandwich-like immunosensor was efficiently fabricated for detection of carcinoembryonic antigen (CEA) with three dimensional sea-urchin-like PdAuCu nanocrystals (PdAuCu NCs)/ferrocene-grafted-polylysine (Fc-g-PLL) as the label of secondary antibodies (Ab2) and Au nanoparticles (Au NPs) as the substrate material. Herein, PdAuCu NCs were directly synthesized with polyethylene oxide (PEO) as a growth-directing agent by a facile one-step aqueous method without any organic solvent. Meanwhile, Fc-g-PLL was obtained by covalent linkage of Fc with PLL via Schiff-base reaction. The well-dispersed PdAuCu NCs by Fc-g-PLL have the enlarged surface area, enhanced catalytic properties and superior biocompatibility to amplify the current signals. The resultant immunosensor shows linear relationship of the electrochemical responses with the CEA concentrations within a broader linear range (0.001-100.0 ng mL-1) and a lower detection limit (0.23 pg mL-1, S/N = 3). Furthermore, the immunosensor was explored for practical assay of CEA in human serum samples with accredited results. The novel immunoassay provides a feasible platform for early medical diagnosis.
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Affiliation(s)
- Yao Chen
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Life Sciences, College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China
| | - Ai-Jun Wang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Life Sciences, College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China
| | - Pei-Xin Yuan
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Life Sciences, College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China
| | - Xiliang Luo
- Key Laboratory of Sensor Analysis of Tumor Marker, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Yadong Xue
- Jinhua Central Hospital, Jinhua 321001, China
| | - Jiu-Ju Feng
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Life Sciences, College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China.
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40
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Xu J, Shen XK, Jia L, Cao JL, Wang Y, Zhao XL, Bi N, Guo SL, Ma TY. A lanthanide-based magnetic nanosensor as an erasable and visible platform for multi-color point-of-care detection of multiple targets and the potential application by smartphone. J Mater Chem B 2019; 7:734-743. [DOI: 10.1039/c8tb02791a] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A magnetic Fe3O4@CePO4:Tb-EDTA-Eu nanosensor as an erasable and visible platform for the multi-color detection of multiple targets was designed.
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Affiliation(s)
- Jun Xu
- College of Chemistry and Chemical Engineering
- Henan Polytechnic University
- Jiaozuo
- China
| | - Xiao-Ke Shen
- College of Chemistry and Chemical Engineering
- Henan Polytechnic University
- Jiaozuo
- China
| | - Lei Jia
- College of Chemistry and Chemical Engineering
- Henan Polytechnic University
- Jiaozuo
- China
| | - Jian-Liang Cao
- College of Chemistry and Chemical Engineering
- Henan Polytechnic University
- Jiaozuo
- China
| | - Yan Wang
- School of Safety Science and Engineering
- State Key Laboratory Cultivation Base for Gas Geology and Gas Control
- Henan Polytechnic University
- Jiaozuo 454000
- China
| | - Xiao-Lei Zhao
- College of Chemistry and Chemical Engineering
- Henan Polytechnic University
- Jiaozuo
- China
| | - Ning Bi
- College of Chemistry and Chemical Engineering
- Henan Polytechnic University
- Jiaozuo
- China
| | - Sheng-Li Guo
- College of Chemistry and Chemical Engineering
- Henan Polytechnic University
- Jiaozuo
- China
| | - Tian-Yi Ma
- Discipline of Chemistry
- University of Newcastle
- Newcastle
- Australia
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41
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Lu M. Bioresponsive-controlled release of methylene blue from magnetic mesoporous silica from the electrochemical detection of telomerase activity. Analyst 2018; 142:3477-3483. [PMID: 28829452 DOI: 10.1039/c7an01127j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
An electrochemical sensing platform was designed to monitor telomerase activity in HeLa cells, using bioresponsively controlled cargo release from magnetic mesoporous silica nanocontainers (MMSNs). The aminated MMSNs were first synthesized by a wet-chemistry method, then methylene blue (indicator) molecules were loaded into the pores with the aid of specifically designed wrapping DNA strands, and then the wrapping DNA-gated MMSNs were immobilized on a magnetic removable screen-printing carbon electrode. Upon target telomerase and dNTP introduction into the detection cell, the wrapping DNA strands on the MMSNs were prolonged to form rigid hairpin-like DNA structures, thus resulting in the dissociation of wrapping DNA strands from the MMSNs. Thereafter, the loaded methylene blue with redox activity was released out from the pores, thereby causing the increase in the electrochemical signal relative to the background signal. Under optimal conditions, an MMSN-based sensing system exhibited good voltammetric responses toward target telomerase activity within the dynamic linear range of 50-5000 cells per mL at a detection limit of 12 cells per mL in the HeLa extract. The reproducibility and generality of our strategy were acceptable by using somatic tumor cell lines. In addition, the inhibition effect of this system was also evaluated by using 3'-azido-3'-deoxythymidine as a telomerase inhibitor, receiving good results in this screening research.
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Affiliation(s)
- Minghua Lu
- Institute of Environmental and Analytical Science, School of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, Henan, P.R. China.
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42
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Zhang LJ, Xia L, Xie HY, Zhang ZL, Pang DW. Quantum Dot Based Biotracking and Biodetection. Anal Chem 2018; 91:532-547. [DOI: 10.1021/acs.analchem.8b04721] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Li-Juan Zhang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, State Key Laboratory of Virology, The Institute for Advanced Studies, and Wuhan Institute of Biotechnology, Wuhan University, Luojia Hill, Wuhan 430072, P.R. China
| | - Li Xia
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, State Key Laboratory of Virology, The Institute for Advanced Studies, and Wuhan Institute of Biotechnology, Wuhan University, Luojia Hill, Wuhan 430072, P.R. China
| | - Hai-Yan Xie
- School of Life Science, Beijing Institute of Technology, Beijing 100081, P.R. China
| | - Zhi-Ling Zhang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, State Key Laboratory of Virology, The Institute for Advanced Studies, and Wuhan Institute of Biotechnology, Wuhan University, Luojia Hill, Wuhan 430072, P.R. China
| | - Dai-Wen Pang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, State Key Laboratory of Virology, The Institute for Advanced Studies, and Wuhan Institute of Biotechnology, Wuhan University, Luojia Hill, Wuhan 430072, P.R. China
- College of Chemistry, Nankai University, 94 Weijin Road, Tianjin 300071, P.R. China
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43
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Hu Y, Huang Y, Wang Z, Wang Y, Ye X, Wong W, Li C, Sun D. Gold/WS 2 nanocomposites fabricated by in-situ ultrasonication and assembling for photoelectrochemical immunosensing of carcinoembryonic antigen. Mikrochim Acta 2018; 185:570. [PMID: 30506429 DOI: 10.1007/s00604-018-3100-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Accepted: 11/15/2018] [Indexed: 01/30/2023]
Abstract
Tungsten disulfide (WS2) nanosheets were obtained by exfoliating WS2 bulk crystals in N-methylpyrrolidone by ultrasonication. Gold nanoparticles (GNPs) were synthesized by in-situ ultrasonication of sodium citrate and HAuCl4 while fabricating the WS2 nanosheets. In this way, the GNPs were self-assembled on WS2 nanosheets to form a GNPs/WS2 nanocomposite through interaction between sulfur and gold atoms. The photoelectrochemical response of WS2 nanosheets is significantly enhanced after integration of the GNPs. The GNPs/WS2 nanocomposite was coated onto a glassy carbon electrode (GCE) to construct a sensing interface which then was modified with an antibody against the carcinoembryonic antigen (CEA) to obtain a photoelectrochemical immunosensor for CEA. Under optimized conditions, the decline in relative photocurrent is linearly related to the logarithm of the CEA concentration in the range from 0.001 to 40 ng mL-1. The detection limit is 0.5 pg mL-1 (at S/N = 3). The assay is sensitive, selective, stable and reproducible. It was applied to the determination of CEA in clinical serum samples. Graphical abstract Schematic presentation of the fabrication of Au/WS2 nanocomposites by in-situ ultrasonication and the procedure for the CEA photoelectrochemical immunosensor preparation, and the photocurrent response towards the carcinoembryonic antigen.
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Affiliation(s)
- Ye Hu
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, 325035, China.,Key Laboratory of Analytical Chemistry of the State Ethnic Affairs Commission, College of Chemistry and Materials Science, South-Central University for Nationalities, Wuhan, 430074, China
| | - Yajiao Huang
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, 325035, China
| | - Zhengguo Wang
- Institute of Food Science and Engineering Technology, Hezhou University, Hezhou, 542899, Guangxi, China
| | - Yanying Wang
- Key Laboratory of Analytical Chemistry of the State Ethnic Affairs Commission, College of Chemistry and Materials Science, South-Central University for Nationalities, Wuhan, 430074, China
| | - Xiaoxue Ye
- Key Laboratory of Analytical Chemistry of the State Ethnic Affairs Commission, College of Chemistry and Materials Science, South-Central University for Nationalities, Wuhan, 430074, China
| | - WingLeung Wong
- School of Chemical and Environmental Engineering, International Healthcare Innovation Institute (Jiangmen), Wuyi University, Jiangmen, 529020, China
| | - Chunya Li
- Key Laboratory of Analytical Chemistry of the State Ethnic Affairs Commission, College of Chemistry and Materials Science, South-Central University for Nationalities, Wuhan, 430074, China.
| | - Dong Sun
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, 325035, China.
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44
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Wang G, Fu Y, Ren Z, Huang J, Best S, Li X, Han G. Upconversion nanocrystal 'armoured' silica fibres with superior photoluminescence for miRNA detection. Chem Commun (Camb) 2018; 54:6324-6327. [PMID: 29862401 DOI: 10.1039/c8cc03480j] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
We have fabricated a flexible membrane, consisting of SiO2 nanofibres armoured with upconversion nanoparticles, exhibiting intense photoluminescence. These assemblies were subsequently grafted with molecular beacons to produce a biosensor suitable for the detection of specific microRNA and with applications in early cancer detection and point-of-care diagnosis.
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Affiliation(s)
- Gang Wang
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, People's Republic of China.
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45
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Applying strand displacement amplification to quantum dots-based fluorescent lateral flow assay strips for HIV-DNA detection. Biosens Bioelectron 2018; 105:211-217. [PMID: 29412945 DOI: 10.1016/j.bios.2018.01.039] [Citation(s) in RCA: 82] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2017] [Revised: 01/01/2018] [Accepted: 01/18/2018] [Indexed: 12/11/2022]
Abstract
Up to now, the colloidal gold labeling immunochromatographic test strip is a mature and applicable technology. However, different from the conventional gold nanoparticle, quantum dot (QD) possesses larger specific surface area and better biocompatibility. So, as a novel nanomaterial, QD is capable of assembling more biomolecule which could enhance the sensitivity and accuracy of strips by rationality. Besides, strand displacement amplification was drawn into our test strips in this paper, this assumption made HIV-DNA recycling many times and converting it to plentiful QD-dsDNA (double-stranded deoxyribonucleic acid), where after these nano-structures would be captured by test zone. Meanwhile, the suggested scheme eliminated the hook effect owing to the target drop out of the incorporation on test zone, and any nucleotide sequence or substance which has aptamers can work as the target, such as carcinoembryonic antigen or mycotoxin. This assay realized the detection limit of as low as 0.76 pM (S/N = 3) and the detection range of 1 pM to 10 nM. In the end, we made use of this fluorescent lateral flow assay strips with great reproducibility for detecting HIV-DNA in human serum, that attested this method could be applied to practical application prospectively.
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46
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Yuan H, Huang Y, Yang J, Guo Y, Zeng X, Zhou S, Cheng J, Zhang Y. An aptamer-based fluorescence bio-sensor for chiral recognition of arginine enantiomers. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 200:330-338. [PMID: 29709792 DOI: 10.1016/j.saa.2018.04.038] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Revised: 04/12/2018] [Accepted: 04/17/2018] [Indexed: 06/08/2023]
Abstract
In this study, a novel aptamer - based fluorescence bio-sensor (aptamer-AuNps) was developed for chiral recognition of arginine (Arg) enantiomers based on aptamer and gold nanoparticles (AuNps). Carboxyfluorescein (FAM) labeled aptamers (Apt) were absorbed on AuNps and their fluorescence intensity could be significantly quenched by AuNps based on fluorescence resonance energy transfer (FRET). Once d-Arg or l-Arg were added into the above solution, the aptamer specifically bind to Arg enantiomers and released from AuNps, so the fluorescence intensity of d-Arg system and l-Arg system were all enhanced. The affinity of Apt to l-Arg is tighter to d-Arg, so the enhanced fluorescence signals of l-Arg system was stronger than d-Arg system. What's more, the enhanced fluorescence were directly proportional to the concentration of d-Arg and l-Arg ranging from 0-300 nM and 0-400 nM with related coefficients of 0.9939 and 0.9952, respectively. Furthermore, the method was successfully applied to detection l-Arg in human urine samples with satisfactory results. Eventually, a simple "OR" logic gate with d-Arg &l-Arg as inputs and AuNps aggregation state as outputs was fabricated, which can help us understand the chiral recognition process deeply.
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Affiliation(s)
- Haiyan Yuan
- Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir, Chongqing Three Gorges University, PR China; School of Environment and Chemical Engineering, Chongqing Three Gorges University, Chongqing 404100, PR China
| | - Yunmei Huang
- Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir, Chongqing Three Gorges University, PR China; School of Environment and Chemical Engineering, Chongqing Three Gorges University, Chongqing 404100, PR China
| | - Jidong Yang
- Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir, Chongqing Three Gorges University, PR China; School of Environment and Chemical Engineering, Chongqing Three Gorges University, Chongqing 404100, PR China.
| | - Yuan Guo
- Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir, Chongqing Three Gorges University, PR China; School of Environment and Chemical Engineering, Chongqing Three Gorges University, Chongqing 404100, PR China
| | - Xiaoqing Zeng
- Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir, Chongqing Three Gorges University, PR China; School of Environment and Chemical Engineering, Chongqing Three Gorges University, Chongqing 404100, PR China
| | - Shang Zhou
- College of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing 408100, PR China
| | - Jiawei Cheng
- Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir, Chongqing Three Gorges University, PR China; School of Environment and Chemical Engineering, Chongqing Three Gorges University, Chongqing 404100, PR China
| | - Yuhui Zhang
- Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir, Chongqing Three Gorges University, PR China; School of Environment and Chemical Engineering, Chongqing Three Gorges University, Chongqing 404100, PR China
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47
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Aydindogan E, Guler Celik E, Odaci Demirkol D, Yamada S, Endo T, Timur S, Yagci Y. Surface Modification with a Catechol-Bearing Polypeptide and Sensing Applications. Biomacromolecules 2018; 19:3067-3076. [DOI: 10.1021/acs.biomac.8b00650] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Eda Aydindogan
- Department of Biochemistry, Faculty of Science, Ege University, 35100 Bornova, Izmir, Turkey
| | - Emine Guler Celik
- Department of Biochemistry, Faculty of Science, Ege University, 35100 Bornova, Izmir, Turkey
| | - Dilek Odaci Demirkol
- Department of Biochemistry, Faculty of Science, Ege University, 35100 Bornova, Izmir, Turkey
| | - Shuhei Yamada
- Molecular Engineering Institute, Kinki University, 11-6 Kayanomori, Iizuka, Fukuoka 820-8555, Japan
| | - Takeshi Endo
- Molecular Engineering Institute, Kinki University, 11-6 Kayanomori, Iizuka, Fukuoka 820-8555, Japan
| | - Suna Timur
- Department of Biochemistry, Faculty of Science, Ege University, 35100 Bornova, Izmir, Turkey
- Central Research Testing and Analysis Laboratory Research and Application Center, Ege University, 35100 Bornova, Izmir, Turkey
| | - Yusuf Yagci
- Department of Chemistry, Faculty of Science and Letters, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey
- Faculty of Science, Chemistry Department, King Abdulaziz University, 21589 Jeddah, Saudi Arabia
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48
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Determination of the activity of telomerase in cancer cells by using BSA-protected gold nanoclusters as a fluorescent probe. Mikrochim Acta 2018; 185:198. [PMID: 29594751 DOI: 10.1007/s00604-018-2734-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2017] [Accepted: 02/13/2018] [Indexed: 10/17/2022]
Abstract
Gold nanoclusters (AuNCs) protected with a bovine serum albumin (BSA) coating are known to emit red fluorescence (peaking at 650 nm) on photoexcitation with ultraviolet light (365 nm). On addition of Cu(II) ions, fluorescence is quenched because Cu(II) complexes certain amino acid units in the BSA chain. Fluorescence is, however, restored if pyrophosphate (PPi) is added because it will chelate Cu(II) and remove it from the BSA coating on the AuNCs. Because PPi is involved in the function of telomerase, the BSA@AuNCs loaded with Cu(II) can act as a fluorescent probe for determination of the activity of telomerase. A fluorescent assay was worked out for telomerase that is highly sensitive and has a wide linear range (10 nU to 10 fM per mL). The fluorescent probe was applied to the determination of telomerase activity in cervix carcinoma cells via imaging. It is shown that tumor cells can be well distinguished from normal cells by monitoring the differences in intracellular telomerase activity. Graphical abstract Gold nanoclusters (AuNCs) protected by bovine serum albumin (BSA) and displaying red photoluminescence were prepared as fluorescent probe for the determination of telomerase activity and used for imaging of cervix carcinoma (HeLa) cells.
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Wang Y, Luo J, Liu J, Li X, Kong Z, Jin H, Cai X. Electrochemical integrated paper-based immunosensor modified with multi-walled carbon nanotubes nanocomposites for point-of-care testing of 17β-estradiol. Biosens Bioelectron 2018; 107:47-53. [PMID: 29428366 DOI: 10.1016/j.bios.2018.02.012] [Citation(s) in RCA: 84] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Revised: 02/02/2018] [Accepted: 02/02/2018] [Indexed: 10/18/2022]
Abstract
17β-estradiol (17β-E2) plays a critical role in regulating reproduction in human, there is therefore an urgent need to detect it sensitively and precisely in a cost-effective and easy method. In this paper, a label-free integrated microfluidic paper-based analytical device was developed for highly sensitive electrochemical detection of 17β-E2. The microfluidic channel of the paper-based sensor was fabricated with wax printing and the three electrodes, including working, counter and reference electrode were screen-printed. Multi-walled carbon nanotubes (MWCNTs)/ thionine (THI)/ gold nanoparticles (AuNPs) Nano composites were synthesized and coated on screen-printed working electrode (SPWE) for the immobilization of anti-E2. In this electro-chemical system of paper-based immunoassay, THI molecules serving as an electrochemical mediator while MWCNTs and AuNPs, due to their excellent electrical conductivities, could accelerate electron transfer for the signal amplification. Experimental results revealed that the immunoassay is able to detect 17β-E2 as low as 10 pg mL-1, with a linear range from 0.01 to 100 ng mL-1. This microfluidic paper-based immunosensor would provide a new platform for low cost, sensitive, specific, and point-of-care diagnosis of 17β-E2.
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Affiliation(s)
- Yang Wang
- State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 10090, China
| | - Jinping Luo
- State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 10090, China
| | - Juntao Liu
- State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 10090, China
| | - Xinrong Li
- State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 10090, China
| | - Zhuang Kong
- State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 10090, China
| | - Hongyan Jin
- Obstetrics and Gynecology Department, First Hospital Peking University, Beijing 100034, China.
| | - Xinxia Cai
- State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 10090, China.
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50
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Kokkinos CT, Giokas DL, Economou AS, Petrou PS, Kakabakos SE. Paper-Based Microfluidic Device with Integrated Sputtered Electrodes for Stripping Voltammetric Determination of DNA via Quantum Dot Labeling. Anal Chem 2018; 90:1092-1097. [DOI: 10.1021/acs.analchem.7b04274] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Christos T. Kokkinos
- Laboratory
of Analytical Chemistry, Department of Chemistry, University of Athens, Athens 15771, Greece
| | - Dimosthenis L. Giokas
- Laboratory
of Analytical Chemistry, Department of Chemistry, University of Ioannina, Ioannina 45110, Greece
| | - Anastasios S. Economou
- Laboratory
of Analytical Chemistry, Department of Chemistry, University of Athens, Athens 15771, Greece
| | - Panagiota S. Petrou
- Immunoassays/Immunosensors Lab, INRaSTES, NCSR “Demokritos”, Aghia Paraskevi, 15310, Greece
| | - Sotirios E. Kakabakos
- Immunoassays/Immunosensors Lab, INRaSTES, NCSR “Demokritos”, Aghia Paraskevi, 15310, Greece
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