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Dou B, Wang K, Chen Y, Wang P. Programmable DNA Nanomachine Integrated with Electrochemically Controlled Atom Transfer Radical Polymerization for Antibody Detection at Picomolar Level. Anal Chem 2024; 96:10594-10600. [PMID: 38904276 DOI: 10.1021/acs.analchem.4c01176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/22/2024]
Abstract
The quantitative detection of antibodies is crucial for the diagnosis of infectious and autoimmune diseases, while the traditional methods experience high background signal noise and restricted signal gain. In this work, we have developed a highly efficient electrochemical biosensor by constructing a programmable DNA nanomachine integrated with electrochemically controlled atom transfer radical polymerization (eATRP). The sensor works by binding the target antidigoxin antibody (anti-Dig) to the epitope of the recognization probe, which then initiates the cascaded strand displacement reaction on a magnetic bead, leading to the capture of cupric oxide (CuO) nanoparticles through magnetic separation. After CuO was dissolved, the eATRP initiators were attached to the electrode based on the CuΙ-catalyzed azide-alkyne cycloaddition. The subsequent eATRP reaction results in the formation of long electroactive polymers (poly-FcMMA), producing an amplified current response for sensitive detection of anti-Dig. This method achieved a detection limit at clinically relevant picomolar concentration in human serum, offering a sensitive, convenient, and cost-effective tool for detecting various biomarkers in a wide range of applications.
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Affiliation(s)
- Baoting Dou
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
| | - Keming Wang
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
| | - Yan Chen
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
| | - Po Wang
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
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2
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Rokutani S, Hiraka K, Saitoh H, Saito T, Nonaka Y, Ueno K, Tsukakoshi K, Ohnishi N, Ikebukuro K. Aptamer-enhanced particle aggregation inhibition assay for simple homogeneous protein detection using DNA aptamer and thermo-responsive magnetic nanoparticles. Biosens Bioelectron 2024; 245:115827. [PMID: 37979546 DOI: 10.1016/j.bios.2023.115827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 10/24/2023] [Accepted: 11/07/2023] [Indexed: 11/20/2023]
Abstract
A simple and sensitive homogeneous protein detection system is required for the early detection of biomarkers. Thermo-responsive magnetic particles (TM) have already been developed to achieve easy bound/free separation at the homogeneous protein detection system, but they are still limited owing to the requirement of secondary antibodies and negatively charged polymers, and it is challenging to control the TM aggregation behavior because of the size of the TM. Therefore, at new method to control TM aggregation behavior that is simple, easy, and highly sensitive is required. In this study, we developed a DNA aptamer-based TM assay as a simple protein detection system without additional secondary molecular recognition elements or negatively charged polymer. In the first attempt, a DNA aptamer was modified on the TM surface, and its aggregation behavior was monitored depending on the target molecule concentration. The TM aggregation rate during the heating process decreased depending on the amount of the DNA aptamer and increased depending on the target protein level. This suggests that the DNA aptamer prevented TM aggregation owing to its negative charge and achieved target protein detection owing to the cancellation of repulsion. Capturable aptamers were used in the TM assay to improve the sensitivity and limit of detection. The designed Capture DNA was modified on the TM surface, and the aptamer was captured in the presence of the target protein through a conformational change. Eventually, Capturable aptamer-based TM assay achieved a sub-nanomolar limit of detection and higher sensitivity than that of our initial investigation. Through this study and the ease of the DNA aptamer design, it was shown that the DNA aptamer-modified TM assay enabled the development of a simple and sensitive homogeneous protein detection system.
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Affiliation(s)
- Shunsuke Rokutani
- Department of Biotechnology and Life Science, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo, 184-8588, Japan
| | - Kentaro Hiraka
- Department of Biotechnology and Life Science, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo, 184-8588, Japan; College of Science, Engineering and Technology, Grand Canyon University, 3300 W Camelback Rd, Phoenix, AZ, 85017, USA; National Institute for Physiological Sciences, National Institutes of Natural Sciences, 38 Nishigonaka, Myodaiji, Okazaki, Aichi, 444-8585, Japan
| | - Hiroshi Saitoh
- JNC Petrochemical Corporation, Goi Research Center, 5-1 Goi-kaigan, Ichihara, Chiba, 290-8551, Japan
| | - Taiki Saito
- Department of Biotechnology and Life Science, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo, 184-8588, Japan
| | - Yoshihiko Nonaka
- Department of Biotechnology and Life Science, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo, 184-8588, Japan
| | - Kinuko Ueno
- Department of Biotechnology and Life Science, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo, 184-8588, Japan
| | - Kaori Tsukakoshi
- Department of Biotechnology and Life Science, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo, 184-8588, Japan
| | - Noriyuki Ohnishi
- JNC Petrochemical Corporation, Goi Research Center, 5-1 Goi-kaigan, Ichihara, Chiba, 290-8551, Japan.
| | - Kazunori Ikebukuro
- Department of Biotechnology and Life Science, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo, 184-8588, Japan.
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3
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Shi H, Che Y, Rong Y, Wang J, Wang Y, Yu J, Zhang Y. Visual/Photoelectrochemical Off-On Sensor Based on Cu/Mn Double-Doped CeO 2 and Branched Sheet Embedded Cu 2O/CuO Nanocubes. BIOSENSORS 2023; 13:227. [PMID: 36831993 PMCID: PMC9954256 DOI: 10.3390/bios13020227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 01/27/2023] [Accepted: 02/02/2023] [Indexed: 06/18/2023]
Abstract
An integrated dual-signal bioassay was devised to fulfil thrombin (TB) ultrasensitive detection by integrating visualization with the photoelectrochemical technique based on G-quadruplex/hemin. During the process, branched sheet embedded copper-based oxides prepared with illumination and alkaline condition play a vital role in obtaining the desirable photocurrent. The switchover of photoelectrochemical signal was realized by the adjustable distance between electron acceptor G-quadruplex/hemin and interface materials due to dissociation of the Cu/Mn double-doped cerium dioxide (CuMn@CeO2)/DNA caused by the addition of TB. Then, CuMn@CeO2 transferred onto visual zones triggered catalytic reactions under the existence of 3,3',5,5'-tetramethylbenzidine and hydrogen peroxide, making a variation in color recognized by the naked eye and providing visual prediction. Under optimized conditions, this bioassay protocol demonstrated wide linear ranges (0.0001-50 nM), high selectivity, stability, and reproducibility. More importantly, the proposed visual/photoelectrochemical transduction mechanism platform exhibits a lower background signal and more reliable detection results, which also offers an effective way for detecting other proteins and nucleic acids.
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Affiliation(s)
- Huihui Shi
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China
| | - Yanfei Che
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China
| | - Yumeng Rong
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China
| | - Jiajun Wang
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China
| | - Yanhu Wang
- Shandong Analysis and Test Center, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China
| | - Jinghua Yu
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China
| | - Yan Zhang
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China
- Key Laboratory of Optic-Electric Sensing and Analytical Chemistry for Life Science, MOE, Qingdao University of Science and Technology, Qingdao 266042, China
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4
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Zhou H, Ding K, Li B, Wang H, Zhang N, Liu J. Proximity binding induced nucleic acid cascade amplification strategy for ultrasensitive homogeneous detection of PSA. Anal Chim Acta 2021; 1186:339123. [PMID: 34756258 DOI: 10.1016/j.aca.2021.339123] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 09/18/2021] [Accepted: 09/25/2021] [Indexed: 12/15/2022]
Abstract
In this work, based on the powerful cycle amplification cascades of proximity hybridization-induced hybridization chain reaction and catalyzed hairpin assembly, we engineered a nonenzymatic and ultrasensitive method which combined the Mg2+-DNAzyme recycling signal amplification for the analysis of the human prostate specific antigen. Herein, we adopted PSA-conjugates as triggers in the self-assembly process of two hairpin DNAs (H1, H2) into the products of the CHA which could activate the HCR to induce repeated hybridization. And both ends of each adjacent sequence of the HCR products could form a unit of Mg2+-DNAzyme which in presence of cofactor Mg2+ could recognize and cyclically cleave the hairpin probes in the solution and thus generate observably enhanced fluorescent signal. Benefit from the nucleic acid circuit amplification strategy, PSA of concentration low to 0.73 pg mL-1 was detected in this system. This homogeneous sensing method in solution avoid the use of the sophisticated equipment and complex operation, as well as addition of artificial enzyme, thus greatly reducing the constraints and complexity of experimental conditions. Moreover, considering most protein biomarkers in serum don't have their corresponding aptamers, this sensing method provide a general sensing approach for homogeneous sensitive detection of these important protein biomarkers which transfer rough antigen-antibody interactivity to smart signal amplification sensing strategies, thus exhibiting a remarkable prospect in clinical application.
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Affiliation(s)
- Hong Zhou
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, PR China.
| | - Kexin Ding
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, PR China
| | - Binxiao Li
- Department of Chemistry, Shanghai Stomatological Hospital, State Key Laboratory of Molecular Engineering of Polymers and Institute of Biomedical Sciences, Fudan University, Shanghai, 200433, PR China
| | - Haiyan Wang
- Department of Blood Transfusion, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, 266071, PR China
| | - Ningbo Zhang
- College of Agriculture and Forestry Science, Linyi University, Linyi, 276005, PR China.
| | - Jing Liu
- College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao, Shandong, 266590, PR China.
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Zhou H, Yu Q, Wang H, Zhu W, Liu J, Wang Z. A general scattering proximity immunoassay with the formation of dimer of gold nanoparticle. Talanta 2021; 233:122515. [PMID: 34215130 DOI: 10.1016/j.talanta.2021.122515] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 04/02/2021] [Accepted: 05/09/2021] [Indexed: 11/29/2022]
Abstract
In this work, we structured a colorimetric ultrasensitive detection of carcinoembryonic antigen (CEA) based on a proximity hybridization-induced gold nanoparticles (Au NPs) dimers structure. Under the dark-field microscope, this method takes advantage of the distinctive and strong distance-relative localized surface plasmon resonance (LSPR) of Au NPs and their oriented assembly. DNA served as a medium showing wonderful flexibility to label antibody and Au NPs, and tune interparticle spacing as well. Two capture probes were formed by the integration of DNA labeled antibody (DNA1-Ab1 or DNA2-Ab2) and asymmetrically assembled DNA (DNA 3 or DNA 4)- Au NPs via partly hybridization between DNA sequences. In the presence of antigen, the reaction between target protein and capture probes could trigger the generation of immunocomplex which led to the proximity hybridization of the DNA1 and DNA2, and then change the distance of interparticle to form Au NP dimers and thus showed a different color under dark-field microscope. A limit of detection of 14.25 pg/mL was obtained for the detection of CEA, which indicated a promising sensing method in clinical diagnosis of protein biomarkers.
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Affiliation(s)
- Hong Zhou
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, PR China.
| | - Qiao Yu
- Shandong Sino-Japanese Center for Collaborative Research of Carbon Nanomaterials, College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, Shandong, 266071, PR China
| | - Haiyan Wang
- The Affiliated Hospital of Qingdao University, Qingdao, Shandong, 266071, PR China
| | - Wenjing Zhu
- Department of Pharmacy, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, Shandong, 266071, PR China
| | - Jing Liu
- College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao, Shandong, 266590, PR China.
| | - Zonghua Wang
- Shandong Sino-Japanese Center for Collaborative Research of Carbon Nanomaterials, College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, Shandong, 266071, PR China
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6
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Abstract
Chymotrypsin is one of the most extensively known proteases participating in the pathogenesis of various diseases, which can be used in drug discovery and clinical diagnosis.
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Affiliation(s)
- Haixia Shi
- P. E. Department
- Jiangsu University
- Zhenjiang 212013
- P. R. China
| | - Cheng Liu
- School of Life Sciences
- Jiangsu University
- Zhenjiang 212013
- P. R. China
| | - Jingjie Cui
- School of Automation
- Hangzhou Dianzi University
- Hangzhou
- P. R. China
| | - Jia Cheng
- School of Life Sciences
- Jiangsu University
- Zhenjiang 212013
- P. R. China
| | - Yuanwei Lin
- School of Life Sciences
- Jiangsu University
- Zhenjiang 212013
- P. R. China
| | - Li Gao
- School of Life Sciences
- Jiangsu University
- Zhenjiang 212013
- P. R. China
| | - Rong Luo
- Institute of Geriatric Cardiovascular Disease
- Chengdu Medical College
- Chengdu
- China
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7
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Cong C, Bian K, Zhang X, Luo L, Li L, He H, Li C, Zhao Q, Wang S, Hao Z, He Y, Gao D. Sensitive measurement of tumor markers somatostatin receptors using an octreotide-directed Pt nano-flakes driven electrochemical sensor. Talanta 2019; 208:120286. [PMID: 31816809 DOI: 10.1016/j.talanta.2019.120286] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2019] [Revised: 08/15/2019] [Accepted: 08/20/2019] [Indexed: 12/13/2022]
Abstract
Tumor markers play an important role in the early diagnosis and therapeutic effect monitoring of tumors. An electrochemical biosensor was developed based on multi-branched gold nanoshells (BGSs) and octreotide (OCT) functionalized Pt nano-flakes (PtNFs) modified electrodes, which was used for detection of tumor-specific markers to evaluate tumor cells. Sandwich-type nano-hybrid materials were prepared by layer-by-layer modification. First, reduced graphene oxide (RGO) and BGSs were modified as electronic materials onto glassy carbon electrodes (GCE). This modified electrode has strong electron transfer capability and large electrode surface area. The OCT was then anchored to the surface of BGSs to sensitively detect Somatostatin receptors (SSTRs) on the surface of HeLa cells. In addition, PtNFs were synthesized using a dual-template method, and OCT template on the surface of PtNFs, as an adsorption bioprobe, was used to reduce the H2O2 and amplify the electrochemical signal of biosensor. The proposed biosensor can be applied to the quantitative broad linear range of HeLa cells covering from 10 to 1 × 106 cells mL-1 (R2 = 0.9998) and the limit of detection (LOD) was 2 cells mL-1. The experimental results also show that the sensor has good stability, biocompatibility and high selectivity, which has great potential for clinical application.
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Affiliation(s)
- Cong Cong
- Applying Chemistry Key Lab of Hebei Province, Department of Bioengineer, Yanshan University, No.438 Hebei Street, Qinhuangdao, 066004, China; State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, PR China
| | - Kexin Bian
- Applying Chemistry Key Lab of Hebei Province, Department of Bioengineer, Yanshan University, No.438 Hebei Street, Qinhuangdao, 066004, China
| | - Xuwu Zhang
- Applying Chemistry Key Lab of Hebei Province, Department of Bioengineer, Yanshan University, No.438 Hebei Street, Qinhuangdao, 066004, China; State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, PR China
| | - Liyao Luo
- Applying Chemistry Key Lab of Hebei Province, Department of Bioengineer, Yanshan University, No.438 Hebei Street, Qinhuangdao, 066004, China
| | - Lei Li
- Applying Chemistry Key Lab of Hebei Province, Department of Bioengineer, Yanshan University, No.438 Hebei Street, Qinhuangdao, 066004, China
| | - Hongyu He
- Applying Chemistry Key Lab of Hebei Province, Department of Bioengineer, Yanshan University, No.438 Hebei Street, Qinhuangdao, 066004, China
| | - Chunhui Li
- Applying Chemistry Key Lab of Hebei Province, Department of Bioengineer, Yanshan University, No.438 Hebei Street, Qinhuangdao, 066004, China
| | - Qianqian Zhao
- Applying Chemistry Key Lab of Hebei Province, Department of Bioengineer, Yanshan University, No.438 Hebei Street, Qinhuangdao, 066004, China
| | - Shuai Wang
- Applying Chemistry Key Lab of Hebei Province, Department of Bioengineer, Yanshan University, No.438 Hebei Street, Qinhuangdao, 066004, China
| | - Zining Hao
- Applying Chemistry Key Lab of Hebei Province, Department of Bioengineer, Yanshan University, No.438 Hebei Street, Qinhuangdao, 066004, China
| | - Yaqian He
- Applying Chemistry Key Lab of Hebei Province, Department of Bioengineer, Yanshan University, No.438 Hebei Street, Qinhuangdao, 066004, China
| | - Dawei Gao
- Applying Chemistry Key Lab of Hebei Province, Department of Bioengineer, Yanshan University, No.438 Hebei Street, Qinhuangdao, 066004, China; State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, PR China; Hebei Province Asparagus Industry Technology Research Institute, Qinhuangdao, PR China.
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8
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Li N, Liu L, Xiang MH, Liu JW, Yu RQ, Jiang JH. Proximity-induced hybridization chain assembly with small-molecule linked DNA for single-step amplified detection of antibodies. Chem Commun (Camb) 2019; 55:4387-4390. [PMID: 30916085 DOI: 10.1039/c9cc01654f] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A novel and versatile platform for single-step amplified fluorescence detection of antibodies via specific proximity-induced hybridization chain assembly is developed.
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Affiliation(s)
- Na Li
- Institute of Chemical Biology and Nanomedicine, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China.
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Citartan M, Tang TH. Recent developments of aptasensors expedient for point-of-care (POC) diagnostics. Talanta 2019; 199:556-566. [PMID: 30952298 DOI: 10.1016/j.talanta.2019.02.066] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2018] [Revised: 02/15/2019] [Accepted: 02/16/2019] [Indexed: 12/12/2022]
Abstract
Aptamers are nucleic acid-based molecular recognition elements that are specific and have high binding affinity against their respective targets. On account of their target recognition capacity, aptamers are widely utilized in a number of applications including diagnostics. This review aims to highlight the recent developments of aptasensors expedient for point-of-care (POC) diagnostics. Significant focus is given on the primary assay formats of aptamers such as fluorescence, electrochemical, surface plasmon resonance (SPR) and colorimetric assays. A potpourri of platforms such as paper-based device, lateral flow assay, portable electrodes, portable SPR and smart phones expedient for point-of-care (POC) diagnostics are discussed. Emphasis is also given on the technicalities and assay configurations associated with the sensors.
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Affiliation(s)
- Marimuthu Citartan
- Advanced Medical and Dental Institute, Universiti Sains Malaysia, Kepala Batas, Penang 13200, Malaysia.
| | - Thean-Hock Tang
- Advanced Medical and Dental Institute, Universiti Sains Malaysia, Kepala Batas, Penang 13200, Malaysia
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Tian Y, Hao L, Wang C, Yang X, Liu S. Quantum Dot Doping-Induced Photoluminescence for Facile, Label-Free, and Sensitive Pyrophosphatase Activity Assay and Inhibitor Screening. NANOMATERIALS 2019; 9:nano9010111. [PMID: 30669286 PMCID: PMC6359004 DOI: 10.3390/nano9010111] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 01/14/2019] [Accepted: 01/15/2019] [Indexed: 12/19/2022]
Abstract
Development of simple, convenient, and sensitive assay methods for pyrophosphatase (PPase) activity is of importance, for disease diagnosis and drug discovery. Herein, a simple, rapid, label-free, and sensitive fluorescence sensor for PPase activity assay is developed, using Cu2+ doping-induced quantum dot (QD) photoluminescence as a signal reporter. The Cu2+ doping of ZnSe QD can induce a dopant-dependent emission response, which will be inhibited after the premixing of Cu2+ with pyrophosphate (PPi), to form a Cu2+-PPi complex. Then, the hydrolysis of PPi into phosphate (Pi), specifically catalyzed by PPase, liberates the free Cu2+ to regain the QD doping for the fluorescence response, which is highly dependent on the PPase activity. The PPase can be sensitively and selectively assayed, with a detection limit of 0.1 mU/mL. The developed sensing strategy can be also employed for the PPase inhibitor screening. Thus, the current QD doping-based sensing strategy offers an efficient and promising avenue for Cu2+, PPi, or PPase-related target analysis, and might hold great potential for the further applications in the clinical disease diagnosis.
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Affiliation(s)
- Yishen Tian
- Key Laboratory of Optic-Electric Sensing and Analytical Chemistry for Life Science, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
| | - Lijie Hao
- Key Laboratory of Optic-Electric Sensing and Analytical Chemistry for Life Science, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
| | - Chao Wang
- Key Laboratory of Optic-Electric Sensing and Analytical Chemistry for Life Science, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
| | - Xiaoyan Yang
- Key Laboratory of Optic-Electric Sensing and Analytical Chemistry for Life Science, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
| | - Shufeng Liu
- Key Laboratory of Optic-Electric Sensing and Analytical Chemistry for Life Science, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
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11
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Abstract
Nucleic acid analysis plays an important role in diagnosing diseases as well as understanding biology. Despite advances in technology, there is still a need to develop a rapid and simple method to detect specific nucleic acids, especially in remote locations and low-resource cases. Here, we proposed a proximity proteolysis reaction in which the reaction between protease and zymogen is enhanced in the presence of a target molecule. The pair of proteins was site-specifically modified with oligonucleotides, and the conjugates were used to develop a method of detecting nucleic acids. Target DNA and RNA could be detected in less than 1 h at sub-nanomolar concentrations based on an absorbance signal. The assay method was resistant to interference by biological matrixes, and its sensitivity could be improved when combined with an isothermal nucleic acid amplification method. The results demonstrated the feasibility of this proximity proteolysis reaction as a new platform technology for detecting specific nucleic acid sequences.
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Affiliation(s)
- Hyeon Ji Park
- Department of Molecular Science and Technology, Ajou University, 206 World cup-ro, Yengtong-gu, Suwon 16499, Korea
| | - Tae Hyeon Yoo
- Department of Molecular Science and Technology, Ajou University, 206 World cup-ro, Yengtong-gu, Suwon 16499, Korea
- Department of Applied Chemistry and Biological Engineering, Ajou University, 206 World cup-ro, Yengtong-gu, Suwon 16499, Korea
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