1
|
Sun Y, Zhu X, Liu H, Dai Y, Han R, Gao D, Luo C, Wang X, Wei Q. Novel Chemiluminescence Sensor for Thrombin Detection Based on Dual-Aptamer Biorecognition and Mesoporous Silica Encapsulated with Iron Porphyrin. ACS APPLIED MATERIALS & INTERFACES 2020; 12:5569-5577. [PMID: 31933352 DOI: 10.1021/acsami.9b20255] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Thrombin is a marker of blood-related diseases, and its detection is of great significance in the fields of medical and biological research. Herein, a novel chemiluminescence (CL) sensor for thrombin detection was prepared based on dual-aptamer biorecognition and mesoporous silica encapsulated with iron porphyrin. Mesoporous silica encapsulated with hematin by aptamer1 (Apt1/hematin/M-SiO2) and magnetic microspheres modified with aptamer2 (Apt2/NH2-MS) were successfully prepared, and the two materials were used to construct a CL sensor to detect thrombin. Primarily, Apt2/NH2-MS is used for pretreatment separation of thrombin samples by the biorecognition effect between the aptamer (Apt2) and target (thrombin). Then, thrombin/Apt2/NH2-MS is again recognized with Apt1 on the surface of Apt1/hematin/M-SiO2 and Apt1/thrombin/Apt2/NH2-MS is formed, so dual-aptamer biorecognition is realized. Meanwhile, the generated Apt1/thrombin/Apt2/NH2-MS makes Apt1 shed off the surface of M-SiO2 and release hematin. The released hematin can catalyze the luminol-H2O2 CL reaction. Therefore, a sandwich-type CL sensor was constructed based on dual-aptamer biorecognition and hematin catalysis for the detection of thrombin. The sensor has a linear range of 7.5 × 10-15 to 2.5 × 10-10 mol·L-1 and a detection limit of 2.2 × 10-15 mol·L-1 and also exhibits excellent selectivity, reproducibility, and stability. The sensor was successfully used for the detection of thrombin in serum samples, which makes it possible to apply the sensor in the detection of thrombin in actual samples.
Collapse
Affiliation(s)
- Yuanling Sun
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering , University of Jinan , Jinan 250022 , PR China
| | - Xiaodong Zhu
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering , University of Jinan , Jinan 250022 , PR China
| | - Hao Liu
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering , University of Jinan , Jinan 250022 , PR China
| | - Yuxue Dai
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering , University of Jinan , Jinan 250022 , PR China
| | - Rui Han
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering , University of Jinan , Jinan 250022 , PR China
| | - Dandan Gao
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering , University of Jinan , Jinan 250022 , PR China
| | - Chuannan Luo
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering , University of Jinan , Jinan 250022 , PR China
| | - Xueying Wang
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering , University of Jinan , Jinan 250022 , PR China
| | - Qin Wei
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering , University of Jinan , Jinan 250022 , PR China
| |
Collapse
|
2
|
Zhang B, Wei C. An aptasensor for the label-free detection of thrombin based on turn-on fluorescent DNA-templated Cu/Ag nanoclusters. RSC Adv 2020; 10:35374-35380. [PMID: 35515676 PMCID: PMC9056932 DOI: 10.1039/d0ra04609d] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Accepted: 09/09/2020] [Indexed: 11/21/2022] Open
Abstract
A highly sensitive thrombin aptasensor was constructed based on the alteration of the aptamer conformation induced by the target recognition and the turn-on fluorescence due to the proximity of two darkish DNA-templated copper/silver nanoclusters (DNA-Cu/Ag NCs). Two DNA templates were designed as the functional structures consisting of the Cu/Ag NC-nucleation segment located at two termini or one terminus and the aptamer segment in the middle of a DNA template. Two darkish DNA-Cu/Ag NCs came close to each other when the aptamer combined with the target due to the conformational alteration of the aptamer structure, resulting in an increased fluorescence signal readout. Thrombin was sensitively determined as low as 1.6 nM in the range of 1.6–8.0 nM with a high selectivity. Finally, this sensor succeeded in detecting thrombin in a real fetal bovine serum. A highly sensitive thrombin aptasensor was constructed based on the alteration of the aptamer conformation induced by the target recognition and the turn-on fluorescence due to the proximity of two darkish DNA-templated copper/silver nanoclusters (DNA-Cu/Ag NCs).![]()
Collapse
Affiliation(s)
- Baozhu Zhang
- College of Chemistry and Chemical Engineering
- Jinzhong University
- P. R. China
| | - Chunying Wei
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education
- Institute of Molecular Science
- Shanxi University
- Taiyuan 030006
- P. R. China
| |
Collapse
|
3
|
Cheng W, Pan J, Yang J, Zheng Z, Lu F, Chen Y, Gao W. A photoelectrochemical aptasensor for thrombin based on the use of carbon quantum dot-sensitized TiO 2 and visible-light photoelectrochemical activity. Mikrochim Acta 2018; 185:263. [PMID: 29687401 DOI: 10.1007/s00604-018-2800-z] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 04/12/2018] [Indexed: 11/26/2022]
Abstract
A photoelectrochemical (PEC) aptasensor for the highly sensitive and specific detection of thrombin is described. This aptasensor is based on an indium tin oxide (ITO) support that is covered with carbon quantum dot (CQD)-sensitized TiO2 and acts as a photoactive matrix. The ITO/TiO2/CQD electrode was prepared by impregnation assembly. It displays an enhanced and steady photocurrent response under irradiation by visible light. A carboxyl-functionalized thrombin-binding aptamer was covalently immobilized on the modified ITO to obtain a PEC aptasensor whose photocurrent decreases with increasing concentration of thrombin. Under 420 nm irradiation at a bias voltage of 0 V, the aptasensor has a linear response in the 1.0 to 250 pM thrombin concentration range, with a 0.83 pM detection limit. Conceivably, this approach can be extended to numerous other PEC aptasensors for the detection of targets for which appropriate aptamers are available. Graphical abstract Schematic of a PEC aptasensor for thrombin. It is based on the use of CQD as the sensitizer, TiO2/CQDs as the photoactive matrix, and the thrombin aptamer as the recognition element.
Collapse
Affiliation(s)
- Wenjie Cheng
- Department of Chemistry and Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Shantou, Guangdong, 515063, People's Republic of China
| | - Jiahong Pan
- Department of Chemistry and Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Shantou, Guangdong, 515063, People's Republic of China
| | - Jianying Yang
- National Detergents and Cosmetics Products Quality Supervision and Inspection Center (Guangdong), Shantou, Guangdong, 515041, People's Republic of China
| | - Zengyao Zheng
- National Detergents and Cosmetics Products Quality Supervision and Inspection Center (Guangdong), Shantou, Guangdong, 515041, People's Republic of China
| | - Fushen Lu
- Analysis & Testing Center, Shantou University, Shantou, Guangdong, 515063, People's Republic of China
| | - Yaowen Chen
- Analysis & Testing Center, Shantou University, Shantou, Guangdong, 515063, People's Republic of China
| | - Wenhua Gao
- Department of Chemistry and Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Shantou, Guangdong, 515063, People's Republic of China.
- Analysis & Testing Center, Shantou University, Shantou, Guangdong, 515063, People's Republic of China.
| |
Collapse
|
4
|
Yang S, Li L, Zhang X, Shang P, Ding S, Zha W, Xu W. Electrochemical determination of thrombin with molecularly imprinted polymers and multiwalled carbon nanotubes. CAN J CHEM 2017. [DOI: 10.1139/cjc-2017-0010] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The preparation and application of reagentless electrochemical thrombin molecularly imprinted sensors were studied using multiwalled carbon nanotubes as sensitivity-enhanced materials. The molecularly imprinted polymer film was prepared by the electropolymerization of o-phenylenediamine with thrombin as the template molecule onto the surface of multiwalled carbon nanotubes modified glassy carbon electrode. After removing thrombin, the poly-o-phenylenediamine molecularly imprinted film was obtained with specific recognition for thrombin. Using the poly-o-phenylenediamine molecularly imprinted polymers as the electron probe, the electrochemical molecularly imprinted sensor was fabricated for the detection of the protein thrombin. Under optimized experimental conditions, the sensor exhibited a good linear response from 10.0 fg/mL to 1.0 μg/mL for thrombin, with correlation coefficient 0.999 and a low detection limit of 1.7 fg/mL. The fabricated molecularly imprinted sensor can be applied to the detection of thrombin in actual sample bovine serum with satisfactory results.
Collapse
Affiliation(s)
- Shaoming Yang
- School of Materials Science and Engineering, East China Jiaotong University, Nanchang 330013, Jiangxi, China
- School of Materials Science and Engineering, East China Jiaotong University, Nanchang 330013, Jiangxi, China
| | - Lingling Li
- School of Materials Science and Engineering, East China Jiaotong University, Nanchang 330013, Jiangxi, China
- School of Materials Science and Engineering, East China Jiaotong University, Nanchang 330013, Jiangxi, China
| | - Xiaorong Zhang
- School of Materials Science and Engineering, East China Jiaotong University, Nanchang 330013, Jiangxi, China
- School of Materials Science and Engineering, East China Jiaotong University, Nanchang 330013, Jiangxi, China
| | - Peiling Shang
- School of Materials Science and Engineering, East China Jiaotong University, Nanchang 330013, Jiangxi, China
- School of Materials Science and Engineering, East China Jiaotong University, Nanchang 330013, Jiangxi, China
| | - Shaoqing Ding
- School of Materials Science and Engineering, East China Jiaotong University, Nanchang 330013, Jiangxi, China
- School of Materials Science and Engineering, East China Jiaotong University, Nanchang 330013, Jiangxi, China
| | - Wenling Zha
- School of Materials Science and Engineering, East China Jiaotong University, Nanchang 330013, Jiangxi, China
- School of Materials Science and Engineering, East China Jiaotong University, Nanchang 330013, Jiangxi, China
| | - Wenyuan Xu
- School of Materials Science and Engineering, East China Jiaotong University, Nanchang 330013, Jiangxi, China
- School of Materials Science and Engineering, East China Jiaotong University, Nanchang 330013, Jiangxi, China
| |
Collapse
|
5
|
Cao J, Xu JJ, Liu XG, Wang SL, Peng LQ. Screening of thrombin inhibitors from phenolic acids using enzyme-immobilized magnetic beads through direct covalent binding by ultrahigh-performance liquid chromatography coupled with quadrupole time-of-flight tandem mass spectrometry. J Chromatogr A 2016; 1468:86-94. [PMID: 27646060 DOI: 10.1016/j.chroma.2016.09.022] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Revised: 08/07/2016] [Accepted: 09/11/2016] [Indexed: 02/06/2023]
Abstract
Thrombin was immobilized on dynabeads®M-270 epoxy by direct covalent binding method for the first time. The enzyme coated magnetic beads were combined with ultrahigh-performance liquid chromatography coupled with quadrupole time-of-flight tandem mass spectrometry technique to establish a simple, rapid and reliable approach for screening thrombin inhibitors from Danshen preparation. The conjugation of thrombin to the magnetic beads was characterized using scanning electron microscope, transmission electron microscope and infrared spectroscopy, and the enzyme activity was determined by the analysis of enzyme-bead ratio and peak areas of target compounds. Several factors including amount of magnetic beads, type of elution solvent, incubation temperature and time were optimized. Additionally, two thrombin-bound compounds (protocatechuic aldehyde and salvianolic acid C) in Danshen injection were validated by conventional inhibitory assay and the IC50 values were 286.11 and 66.09μg/mL, respectively. Our findings suggested that the proposed method was efficient in screening active compounds from medicinal plants.
Collapse
Affiliation(s)
- Jun Cao
- College of Material Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, China.
| | - Jing-Jing Xu
- College of Material Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, China
| | - Xun-Gao Liu
- College of Material Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, China
| | - Shu-Ling Wang
- College of Material Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, China
| | - Li-Qing Peng
- College of Material Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, China
| |
Collapse
|
6
|
Shi K, Dou B, Yang J, Yuan R, Xiang Y. Target-triggered catalytic hairpin assembly and TdT-catalyzed DNA polymerization for amplified electronic detection of thrombin in human serums. Biosens Bioelectron 2016; 87:495-500. [PMID: 27592241 DOI: 10.1016/j.bios.2016.08.056] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Revised: 08/14/2016] [Accepted: 08/17/2016] [Indexed: 01/18/2023]
Abstract
Specific and sensitive detection of protein biomarkers is of great importance in biomedical and bioanalytical applications. In this work, a dual amplified signal enhancement approach based on the integration of catalytic hairpin assembly (CHA) and terminal deoxynucleotidyl transferase (TdT)-mediated in situ DNA polymerization has been developed for highly sensitive and label-free electrochemical detection of thrombin in human serums. The presence of the target thrombin leads to the unfolding and capture of a significant number of hairpin signal probes with free 3'-OH termini on the sensor electrode. Subsequently, TdT can catalyze the elongation of the signal probes and formation of many G-quadruplex sequence replicates with the presence of dGTP and dATP at a molar ratio of 6:4. These G-quadruplex sequences bind hemin and generate drastically amplified current response for sensitive detection of thrombin in a completely label-free fashion. The sensor shows a linear range of 0.5pM-10.0nM and a detection limit of 0.12pM for thrombin. Moreover, the developed sensor can selectively discriminate the target thrombin against other non-target proteins and can be employed to monitor thrombin in human serum samples.
Collapse
Affiliation(s)
- Kai Shi
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Baoting Dou
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Jianmei Yang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Ruo Yuan
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Yun Xiang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China.
| |
Collapse
|
7
|
Thrombin-linked aptamer assay for detection of platelet derived growth factor BB on magnetic beads in a sandwich format. Talanta 2016; 158:159-164. [PMID: 27343590 DOI: 10.1016/j.talanta.2016.05.037] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Revised: 05/10/2016] [Accepted: 05/13/2016] [Indexed: 12/17/2022]
Abstract
Here we describe a thrombin-linked aptamer assay (TLAA) for protein by using thrombin as an enzyme label, harnessing enzyme activity of thrombin and aptamer affinity binding. TLAA converts detection of specific target proteins to the detection of thrombin by using a DNA sequence that consists of two aptamers with the first aptamer binding to the specific target protein and the second aptamer binding to thrombin. Through the affinity binding, the thrombin enzyme is labeled on the protein target, and thrombin catalyzes the hydrolysis of small peptide substrate into product, generating signals for quantification. As a proof of principle, we show a sandwich TLAA for platelet derived growth factor BB (PDGF-BB) by using anti-PDGF-BB antibody coated on magnetic beads and an oligonucleotide containing the aptamer for PDGF-BB and the aptamer for thrombin. The binding of PDGF-BB to both the antibody and the aptamer results in labeling the complex with thrombin. We achieved detection of PDGF-BB at 16 pM. This TLAA contributes a new application of thrombin and its aptamer in bioanalysis, and shows potentials in assay developments.
Collapse
|
8
|
Wen Y, Li L, Wang L, Xu L, Liang W, Ren S, Liu G. Biomedical Applications of DNA-Nanomaterials Based on Metallic Nanoparticles and DNA Self-Assembled Nanostructures. CHINESE J CHEM 2016. [DOI: 10.1002/cjoc.201500849] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
|
9
|
Huang X, Li Y, Huang X, Chen Y, Gao W. Combining a loop-stem aptamer sequence with methylene blue: a simple assay for thrombin detection by resonance light scattering technique. RSC Adv 2015. [DOI: 10.1039/c4ra14729d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Schematic illustration of the RLS aptasensor for selective detection of human thrombin.
Collapse
Affiliation(s)
- Xiaopeng Huang
- Department of Chemistry
- Shantou University
- Shantou
- P. R. China
| | - Yuqin Li
- Department of Pharmacy
- Taishan Medicine College
- Taian
- P. R. China
| | - Xiang Huang
- Department of Chemistry
- Shantou University
- Shantou
- P. R. China
| | - Yaowen Chen
- Analysis & Testing Center
- Shantou University
- Shantou
- P. R. China
| | - Wenhua Gao
- Department of Chemistry
- Shantou University
- Shantou
- P. R. China
- Analysis & Testing Center
| |
Collapse
|
10
|
Bao T, Wen W, Zhang X, Wang S. An exonuclease-assisted amplification electrochemical aptasensor of thrombin coupling "signal on/off" strategy. Anal Chim Acta 2014; 860:70-6. [PMID: 25682249 DOI: 10.1016/j.aca.2014.12.027] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Revised: 12/07/2014] [Accepted: 12/12/2014] [Indexed: 01/30/2023]
Abstract
In this work, a dual-signaling electrochemical aptasensor based on exonuclease-catalyzed target recycling was developed for thrombin detection. The proposed aptasensor coupled "signal-on" and "signal-off" strategies. As to the construction of the aptasensor, ferrocene (Fc) labeled thrombin binding aptamer (TBA) could perfectly hybridize with the methylene blue (MB) modified thiolated capture DNA to form double-stranded structure, hence emerged two different electrochemical signals. In the presence of thrombin, TBA could form a G-quadruplex structure with thrombin, leading to the dissociation of TBA from the duplex DNA and capture DNA formed hairpin structure. Exonuclease could selectively digest single-stranded TBA in G-quadruplex structure and released thrombin to realize target recycling. As a consequence, the electrochemical signal of MB enhanced significantly, which realized "signal on" strategy, meanwhile, the deoxidization peak current of Fc decreased distinctly, which realized "signal off" strategy. The employment of exonuclease and superposition of two signals significantly improved the sensitivity of the aptasensor. In this way, an aptasensor with high sensitivity, good stability and selectivity for quantitative detection of thrombin was constructed, which exhibited a good linear range from 5 pM to 50 nM with a detection limit of 0.9 pM (defined as S/N=3). In addition, this design strategy could be applied to the detection of other proteins and small molecules.
Collapse
Affiliation(s)
- Ting Bao
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, PR China
| | - Wei Wen
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, PR China
| | - Xiuhua Zhang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, PR China
| | - Shengfu Wang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, PR China.
| |
Collapse
|
11
|
Zhao Q, Gao J. Sensitive and selective detection of thrombin by using a cyclic peptide as affinity ligand. Biosens Bioelectron 2014; 63:21-25. [PMID: 25048449 DOI: 10.1016/j.bios.2014.07.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2014] [Revised: 06/23/2014] [Accepted: 07/03/2014] [Indexed: 11/16/2022]
Abstract
Here we describe a sensitive assay for thrombin by using a high binding-affinity cyclic peptide against thrombin as affinity ligand. The cyclic peptide is immobilized on the magnetic beads or microplates to selectively capture thrombin. The enriched thrombin then catalyzes the cleavage of a substrate of thrombin to a detectable product. The detection of thrombin is finally achieved by measuring the generated product. This assay enables the detection of thrombin at tens fM in 100 µL of sample solution when fluorogenic substrate was applied, while detection limits reached pM level when chromogenic substrate was used. Thrombin in plasma sample can be detected with this assay. This cyclic peptide affinity ligand shows potentials for thrombin analysis in other detection formats.
Collapse
Affiliation(s)
- Qiang Zhao
- Research Institute of Environmental Science, College of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China.
| | - Jie Gao
- Research Institute of Environmental Science, College of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China
| |
Collapse
|
12
|
Chen Z, Tan Y, Zhang C, Yin L, Ma H, Ye N, Qiang H, Lin Y. A colorimetric aptamer biosensor based on cationic polymer and gold nanoparticles for the ultrasensitive detection of thrombin. Biosens Bioelectron 2014; 56:46-50. [PMID: 24463195 DOI: 10.1016/j.bios.2014.01.012] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Revised: 12/21/2013] [Accepted: 01/05/2014] [Indexed: 11/29/2022]
Abstract
A colorimetric assay for the ultrasensitive determination of thrombin based on cationic polymer and gold nanoparticles was presented, in which unmodified gold nanoparticles (AuNPs) was used as probes and 21-mer thrombin-binding aptamer (TBA) as sensing elements. Upon the addition of thrombin, TBA interacted specifically with thrombin to form a G-quadruplex structure. As a result, the conformation change facilitated the cationic polymer, poly(diallyldimethylammonium chloride) (PDDA)-induced AuNP aggregation. Thus, the visible change in color from wine-red to blue-purple was readily seen by the naked eye. The colorimetric sensor could detect thrombin down to 1 pM with high selectivity in the presence of other interferring proteins. Furthermore, the assay was successfully employed to determine thrombin in human serum sample, which suggested its great potential for diagnostic purposes.
Collapse
Affiliation(s)
- Zhengbo Chen
- Department of Chemistry, Capital Normal University, Beijing 100048, China.
| | - Yuan Tan
- Department of Chemistry, Capital Normal University, Beijing 100048, China
| | - Chenmeng Zhang
- Department of Chemistry, Capital Normal University, Beijing 100048, China
| | - Lu Yin
- Department of Chemistry, Capital Normal University, Beijing 100048, China
| | - He Ma
- Department of Chemistry, Capital Normal University, Beijing 100048, China
| | - Nengsheng Ye
- Department of Chemistry, Capital Normal University, Beijing 100048, China
| | - Hong Qiang
- Department of Chemistry, Capital Normal University, Beijing 100048, China
| | - Yuqing Lin
- Department of Chemistry, Capital Normal University, Beijing 100048, China
| |
Collapse
|
13
|
Liu B, Zhang B, Chen G, Tang D. An omega-like DNA nanostructure utilized for small molecule introduction to stimulate formation of DNAzyme-aptamer conjugates. Chem Commun (Camb) 2014; 50:1900-2. [PMID: 24407587 DOI: 10.1039/c3cc49005j] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An omega (Ω)-like DNA nanostructure was for the first time utilized for homogenous electrochemical monitoring of small molecules (ATP used in this case) based on target-induced formation of DNAzyme-aptamer conjugates without the need for sample separation and washing.
Collapse
Affiliation(s)
- Bingqian Liu
- Ministry of Education Key Laboratory of Analysis and Detection of Food Safety, Fujian Provincial Key Laboratory of Analysis and Detection of Food Safety, Department of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350108, P.R. China.
| | | | | | | |
Collapse
|
14
|
Kim BH, Yoon IS, Lee JS. Masking nanoparticle surfaces for sensitive and selective colorimetric detection of proteins. Anal Chem 2013; 85:10542-8. [PMID: 24079726 DOI: 10.1021/ac4026169] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
We have developed a convenient and efficient colorimetric detection system for protein targets using aptamer-gold nanoparticle conjugates. We take advantage of the correlation between the catalytic properties and the exposed surface area of the nanoparticles, which is inversely proportional to the amount of the aptamer-bound protein targets. As the concentration of the protein target increases, the nanoparticle surface area becomes more masked, thus increasing the reduction time of 4-nitrophenol for the color change. We also reduce the detection time by either redesigning the aptamer sequences or regulating their density. This detection system is highly selective, discriminating the target protein even at a concentration 1000 times higher than the limit of detection (LOD). Importantly, to the best of our knowledge, the LOD with the unaided eye in this work is the lowest for a colorimetric detection system using lysozyme as a model protein (16 nM). Lysozyme in chicken egg whites is directly analyzed using our detection system, whose results are in excellent agreement with the enzyme-linked immunosorbent assay (ELISA) analysis.
Collapse
Affiliation(s)
- Byung-Ho Kim
- Department of Materials Science and Engineering, Korea University , Seoul 136-713, Republic of Korea
| | | | | |
Collapse
|