1
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Domsicova M, Korcekova J, Poturnayova A, Breier A. New Insights into Aptamers: An Alternative to Antibodies in the Detection of Molecular Biomarkers. Int J Mol Sci 2024; 25:6833. [PMID: 38999943 PMCID: PMC11240909 DOI: 10.3390/ijms25136833] [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: 05/30/2024] [Revised: 06/17/2024] [Accepted: 06/18/2024] [Indexed: 07/14/2024] Open
Abstract
Aptamers are short oligonucleotides with single-stranded regions or peptides that recently started to transform the field of diagnostics. Their unique ability to bind to specific target molecules with high affinity and specificity is at least comparable to many traditional biorecognition elements. Aptamers are synthetically produced, with a compact size that facilitates deeper tissue penetration and improved cellular targeting. Furthermore, they can be easily modified with various labels or functional groups, tailoring them for diverse applications. Even more uniquely, aptamers can be regenerated after use, making aptasensors a cost-effective and sustainable alternative compared to disposable biosensors. This review delves into the inherent properties of aptamers that make them advantageous in established diagnostic methods. Furthermore, we will examine some of the limitations of aptamers, such as the need to engage in bioinformatics procedures in order to understand the relationship between the structure of the aptamer and its binding abilities. The objective is to develop a targeted design for specific targets. We analyse the process of aptamer selection and design by exploring the current landscape of aptamer utilisation across various industries. Here, we illuminate the potential advantages and applications of aptamers in a range of diagnostic techniques, with a specific focus on quartz crystal microbalance (QCM) aptasensors and their integration into the well-established ELISA method. This review serves as a comprehensive resource, summarising the latest knowledge and applications of aptamers, particularly highlighting their potential to revolutionise diagnostic approaches.
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Affiliation(s)
- Michaela Domsicova
- Centre of Biosciences, Institute of Molecular Physiology and Genetics, Slovak Academy of Sciences, Dúbravská Cesta 9, 84005 Bratislava, Slovakia; (M.D.); (J.K.); (A.P.)
| | - Jana Korcekova
- Centre of Biosciences, Institute of Molecular Physiology and Genetics, Slovak Academy of Sciences, Dúbravská Cesta 9, 84005 Bratislava, Slovakia; (M.D.); (J.K.); (A.P.)
| | - Alexandra Poturnayova
- Centre of Biosciences, Institute of Molecular Physiology and Genetics, Slovak Academy of Sciences, Dúbravská Cesta 9, 84005 Bratislava, Slovakia; (M.D.); (J.K.); (A.P.)
| | - Albert Breier
- Centre of Biosciences, Institute of Molecular Physiology and Genetics, Slovak Academy of Sciences, Dúbravská Cesta 9, 84005 Bratislava, Slovakia; (M.D.); (J.K.); (A.P.)
- Institute of Biochemistry and Microbiology, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 81237 Bratislava, Slovakia
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2
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Ji C, Wei J, Zhang L, Hou X, Tan J, Yuan Q, Tan W. Aptamer-Protein Interactions: From Regulation to Biomolecular Detection. Chem Rev 2023; 123:12471-12506. [PMID: 37931070 DOI: 10.1021/acs.chemrev.3c00377] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2023]
Abstract
Serving as the basis of cell life, interactions between nucleic acids and proteins play essential roles in fundamental cellular processes. Aptamers are unique single-stranded oligonucleotides generated by in vitro evolution methods, possessing the ability to interact with proteins specifically. Altering the structure of aptamers will largely modulate their interactions with proteins and further affect related cellular behaviors. Recently, with the in-depth research of aptamer-protein interactions, the analytical assays based on their interactions have been widely developed and become a powerful tool for biomolecular detection. There are some insightful reviews on aptamers applied in protein detection, while few systematic discussions are from the perspective of regulating aptamer-protein interactions. Herein, we comprehensively introduce the methods for regulating aptamer-protein interactions and elaborate on the detection techniques for analyzing aptamer-protein interactions. Additionally, this review provides a broad summary of analytical assays based on the regulation of aptamer-protein interactions for detecting biomolecules. Finally, we present our perspectives regarding the opportunities and challenges of analytical assays for biological analysis, aiming to provide guidance for disease mechanism research and drug discovery.
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Affiliation(s)
- Cailing Ji
- Molecular Science and Biomedicine Laboratory (MBL), State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Junyuan Wei
- Molecular Science and Biomedicine Laboratory (MBL), State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Lei Zhang
- Molecular Science and Biomedicine Laboratory (MBL), State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Xinru Hou
- Molecular Science and Biomedicine Laboratory (MBL), State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Jie Tan
- Molecular Science and Biomedicine Laboratory (MBL), State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Quan Yuan
- Molecular Science and Biomedicine Laboratory (MBL), State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Weihong Tan
- Molecular Science and Biomedicine Laboratory (MBL), State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
- The Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Hangzhou Institute of Medicine (HIM), Chinese Academy of Sciences, Hangzhou, Zhejiang 310022, China
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3
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Abstract
Rapid and specific assaying of molecules that report on a pathophysiological condition, environmental pollution, or drug concentration is pivotal for establishing efficient and accurate diagnostic systems. One of the main components required for the construction of these systems is the recognition element (receptor) that can identify target analytes. Oligonucleotide switching structures, or aptamers, have been widely studied as selective receptors that can precisely identify targets in different analyzed matrices with minimal interference from other components in an antibody-like recognition process. These aptasensors, especially when integrated into sensing platforms, enable a multitude of sensors that can outperform antibody-based sensors in terms of flexibility of the sensing strategy and ease of deployment to areas with limited resources. Research into compounds that efficiently enhance signal transduction and provide a suitable platform for conjugating aptamers has gained huge momentum over the past decade. The multifaceted nature of conjugated polymers (CPs), notably their versatile electrical and optical properties, endows them with a broad range of potential applications in optical, electrical, and electrochemical signal transduction. Despite the substantial body of research demonstrating the enhanced performance of sensing devices using doped or nanostructure-embedded CPs, few reviews are available that specifically describe the use of conjugated polymers in aptasensing. The purpose of this review is to bridge this gap and provide a comprehensive description of a variety of CPs, from a historical viewpoint, underpinning their specific characteristics and demonstrating the advances in biosensors associated with the use of these conjugated polymers.
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Affiliation(s)
- Razieh Salimian
- Universite de Pau et des Pays de l'Adour, E2S UPPA, CNRS, IPREM, Pau 64053, France
| | - Corinne Nardin
- Universite de Pau et des Pays de l'Adour, E2S UPPA, CNRS, IPREM, Pau 64053, France
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4
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Wu W, Xia S, Zhao M, Ping J, Lin JM, Hu Q. Colorimetric liquid crystal-based assay for the ultrasensitive detection of AFB1 assisted with rolling circle amplification. Anal Chim Acta 2022; 1220:340065. [DOI: 10.1016/j.aca.2022.340065] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 05/28/2022] [Accepted: 06/07/2022] [Indexed: 11/17/2022]
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Sykes KS, White RJ. Effects of Nucleic Acid Structural Heterogeneity on the Electrochemistry of Tethered Redox Molecules. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:7322-7330. [PMID: 35639972 PMCID: PMC10150402 DOI: 10.1021/acs.langmuir.2c00840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The cation condensation-induced collapse of electrode-bound nucleic acids and the resulting change in the electrochemical signal is a useful tool to predict the structure and redox probe location of heterogeneous structures of surface-tethered DNA probes─a common architecture employed in the development of electrochemical sensors. In this paper, we measure the faradaic current of an appended redox molecule at the 3' position of the nucleic acid using cyclic voltammetry before and after nucleic acid collapse for various nucleic acid architectures and heterogeneous mixtures on the same electrode surface. The voltammetric peak current change with collapse correlates with the proximity of the redox molecules from the surface. For stem-loop probes, the terminal methylene blue is initially held closer to the surface, such that inducing collapse, by reducing the dielectric permittivity of the interrogation solution, results in a ∼30% increase in current. However, when incorporating pseudoknot probes that hold methylene blue further away from the electrode surface, the current change is much larger (∼120%), indicating a larger conformation change. Upon a 50:50 ratio of the two, we observe a change in current that relates to the ratiometric distribution of the probe used to make the surfaces. Additionally, using cyclic voltammetry, we find that the change between diffusion-limited and diffusion-independent peak currents is dependent upon the distinct structural characteristics of DNA probes on the surface (stem-loop or pseudoknot), as well as the ratios of different DNA probes on the surface. Thus, we demonstrate that the heterogeneous nature of DNA probes governs the corresponding electrochemical signals, which can lead to a better understanding on how to predict the structures of functional nucleic acids on electrode surfaces and how this affects surface-to-surface variability and electrochemical response.
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Affiliation(s)
- Kiana S. Sykes
- Department of Chemistry, University of Cincinnati, Cincinnati, Ohio 45221-0172, United States
| | - Ryan J. White
- Department of Chemistry, University of Cincinnati, Cincinnati, Ohio 45221-0172, United States
- Department of Electrical and Computer Engineering, University of Cincinnati, Cincinnati, Ohio 45221-0172, United States
- Corresponding Author:
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6
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Liu K, Wei Y, Xu J, Qiu L, Hu S, Wan J, Feng J. A poly(carbazole‐
alt
‐fluorene) π‐conjugated polymer bearing thiophenyl benzimidazole: synthesis, characterization and fluorescence recognition of metal ions and cysteine. POLYM INT 2021. [DOI: 10.1002/pi.6257] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Kuan Liu
- College of Science, Sichuan Agricultural University Ya'an China
| | - Yuhan Wei
- College of Science, Sichuan Agricultural University Ya'an China
| | - Jinyao Xu
- College of Science, Sichuan Agricultural University Ya'an China
| | - Lingfei Qiu
- College of Science, Sichuan Agricultural University Ya'an China
| | - Shaping Hu
- College of Science, Sichuan Agricultural University Ya'an China
| | - Jiayi Wan
- College of Science, Sichuan Agricultural University Ya'an China
| | - Juhua Feng
- College of Science, Sichuan Agricultural University Ya'an China
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7
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Qi X, Yan X, Zhao Y, Li L, Wang S. Highly sensitive and specific detection of small molecules using advanced aptasensors based on split aptamers: A review. Trends Analyt Chem 2020. [DOI: 10.1016/j.trac.2020.116069] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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8
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Debiais M, Lelievre A, Smietana M, Müller S. Splitting aptamers and nucleic acid enzymes for the development of advanced biosensors. Nucleic Acids Res 2020; 48:3400-3422. [PMID: 32112111 PMCID: PMC7144939 DOI: 10.1093/nar/gkaa132] [Citation(s) in RCA: 79] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 02/12/2020] [Accepted: 02/18/2020] [Indexed: 12/16/2022] Open
Abstract
In analogy to split-protein systems, which rely on the appropriate fragmentation of protein domains, split aptamers made of two or more short nucleic acid strands have emerged as novel tools in biosensor set-ups. The concept relies on dissecting an aptamer into a series of two or more independent fragments, able to assemble in the presence of a specific target. The stability of the assembled structure can further be enhanced by functionalities that upon folding would lead to covalent end-joining of the fragments. To date, only a few aptamers have been split successfully, and application of split aptamers in biosensing approaches remains as promising as it is challenging. Further improving the stability of split aptamer target complexes and with that the sensitivity as well as efficient working modes are important tasks. Here we review functional nucleic acid assemblies that are derived from aptamers and ribozymes/DNAzymes. We focus on the thrombin, the adenosine/ATP and the cocaine split aptamers as the three most studied DNA split systems and on split DNAzyme assemblies. Furthermore, we extend the subject into split light up RNA aptamers used as mimics of the green fluorescent protein (GFP), and split ribozymes.
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Affiliation(s)
- Mégane Debiais
- Institut des Biomolécules Max Mousseron, University of Montpellier, CNRS, ENCSM, Montpellier, France
| | - Amandine Lelievre
- University Greifswald, Institute for Biochemistry, Greifswald, Germany
| | - Michael Smietana
- Institut des Biomolécules Max Mousseron, University of Montpellier, CNRS, ENCSM, Montpellier, France
| | - Sabine Müller
- University Greifswald, Institute for Biochemistry, Greifswald, Germany
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9
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Wu Y, Belmonte I, Sykes KS, Xiao Y, White RJ. Perspective on the Future Role of Aptamers in Analytical Chemistry. Anal Chem 2019; 91:15335-15344. [PMID: 31714748 PMCID: PMC10184572 DOI: 10.1021/acs.analchem.9b03853] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
It has been almost 30 years since the invention of Systematic Evolution of Ligands by Exponential Enrichment (SELEX) methodology and the description of the first aptamers. In retrospect over the past 30 years, advances in aptamer development and application have demonstrated that aptamers are potentially useful reagents that can be employed in diverse areas within analytical chemistry, biotechnology, biomedicine, and molecular biology. While often touted as artificial antibodies with an ability to be selected for any target, aptamer development, unfortunately, lags behind development of analytical methodologies that employ aptamers, hindering deeper integration into the application of analytical tool development. This perspective covers recent advances in SELEX methodology for improving efficiency of the SELEX procedure and enhancing affinity and specificity of the selected aptamers, what we view as a critical barrier in the future role of aptamers in analytical chemistry. We discuss postselection modifications that can be used for enhancing performance of the selected aptamers in an analytical device by including understanding intermolecular interaction forces in the binding domain. While highlighting promising properties of aptamers that enable several analytical advances, we provide discussion on the challenges of penetration of aptamers in the analytical field.
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Affiliation(s)
- Yao Wu
- Department of Chemistry , University of Cincinnati , Cincinnati , Ohio 45221 , United States
| | - Israel Belmonte
- Department of Chemistry , University of Cincinnati , Cincinnati , Ohio 45221 , United States
| | - Kiana S Sykes
- Department of Chemistry , University of Cincinnati , Cincinnati , Ohio 45221 , United States
| | - Yi Xiao
- Department of Chemistry and Biochemistry , Florida International University , Miami , Florida 33199 , United States
| | - Ryan J White
- Department of Chemistry , University of Cincinnati , Cincinnati , Ohio 45221 , United States.,Department of Electrical Engineering and Computer Science , University of Cincinnati , Cincinnati , Ohio 45221 , United States
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10
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Kang B, Park SV, Soh HT, Oh SS. A Dual-Sensing DNA Nanostructure with an Ultrabroad Detection Range. ACS Sens 2019; 4:2802-2808. [PMID: 31547650 DOI: 10.1021/acssensors.9b01503] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Despite considerable interest in the development of biosensors that can measure analyte concentrations with a dynamic range spanning many orders of magnitude, this goal has proven difficult to achieve. We describe here a modular biosensor architecture that integrates two different readout mechanisms into a single-molecule construct that can achieve target detection across an extraordinarily broad dynamic range. Our dual-mode readout DNA biosensor combines an aptamer and a DNAzyme to quantify adenosine triphosphate (ATP) with two different mechanisms, which respond to low (micromolar) and high (millimolar) concentrations by generating distinct readouts based on changes in fluorescence and absorbance, respectively. Importantly, we have also devised regulatory strategies to fine-tune the target detection range of each sensor module by controlling the target-sensitivity of each readout mechanism. Using this strategy, we report the detection of ATP at a dynamic range spanning 1-500 000 μM, more than 5 orders of magnitude, representing the largest dynamic range reported to date with a single biosensor construct.
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Affiliation(s)
| | | | - Hyongsok Tom Soh
- Department of Electrical Engineering and Department of Radiology, Canary Center at Stanford University, 3155 Porter Drive, Stanford, California 94305, United States
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11
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Li X, Wu Y, Niu J, Jiang D, Xiao D, Zhou C. One-step sensitive thrombin detection based on a nanofibrous sensing platform. J Mater Chem B 2019; 7:5161-5169. [PMID: 31384858 DOI: 10.1039/c9tb01098j] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Convenient and time-saving one-step strategies for detecting ultralow concentrations of protein biomarkers play key roles in rapid disease diagnosis. In this study, we report a one-step detection method based on a nanofibrous sensing platform via the combination of proximity-induced DNA strand displacement (PiDSD), catalytic hairpin assembly (CHA) amplification and thioflavin T (ThT) binding. The interface behaviors on the nanofibrous membrane were studied to promote interface reaction kinetics and thermodynamics. Thrombin was used as a model biomarker, and the nanofibrous sensing platform achieved a limit of detection as low as 1.0 pM, a wide linear range of 50 pM to 5 nM, excellent specificity and good long-term stability. Compared with previous one-step thrombin detection methods, our one-step detection method is label-free, convenient and much more sensitive; it has potential applications for protein detection in point-to-care testing (POCT) and early diagnosis.
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Affiliation(s)
- Xiaoling Li
- College of Chemistry, Sichuan University, Chengdu 610064, P. R. China.
| | - Yuyang Wu
- College of Chemistry, Sichuan University, Chengdu 610064, P. R. China.
| | - Jingjing Niu
- College of Chemistry, Sichuan University, Chengdu 610064, P. R. China.
| | - Dagang Jiang
- College of Chemistry, Sichuan University, Chengdu 610064, P. R. China.
| | - Dan Xiao
- College of Chemistry, Sichuan University, Chengdu 610064, P. R. China.
| | - Cuisong Zhou
- College of Chemistry, Sichuan University, Chengdu 610064, P. R. China.
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12
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Sensitive monitoring of RNA transcription by optical amplification of cationic conjugated polymers. Talanta 2019; 203:314-321. [PMID: 31202345 DOI: 10.1016/j.talanta.2019.05.052] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 04/12/2019] [Accepted: 05/10/2019] [Indexed: 01/08/2023]
Abstract
We reported a new strategy for sensitive monitoring in vitro RNA synthesis in real time based on fluorescence resonance energy transfer (FRET) from water-soluble conjugated polymer poly (9, 9-bis (6'-N, N, N,-trimethylammonium) hexyl) fluorene-co-alt-1,4-phenylene) bromide (PFP) to fluorogenic RNA aptamer/fluorophore (Spanich2/DFHBI and Broccoli/DFHBI) system. In this strategy, RNA of interest was transcribed accompanied by the Spanich2 or Broccoli. Then the 3, 5-difluoro-4-hydroxybenzylidene imidazolinone (DFHBI) bound to the RNA aptamer sequence and thereby induced a fluorescence signal. PFP was used as the fluorescence energy donor, and Spanich2/DFHBI was the fluorescence energy acceptor. The fluorescence signal of Spanich2/DFHBI was amplified by light-harvesting and fluorescence amplification ability of PFP via FRET. And the limit of detection (LOD) (0.29 nM) was near 10-fold lower than that of RNA aptamer/DFHBI (LOD is 2.8 nM) alone by measuring the FRET ratio, which greatly reduced the variation of background signals. Most importantly, the addition of PFP did not interfere with RNA transcription in vitro, so this method was successfully applied to sensitively monitor RNA transcription and effect of T7 RNA polymerase inhibitor in real time, supplying a sensitive and simple method to study the modulation and inhibitor of RNA polymerase in vitro.
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13
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Ma Y, Geng F, Wang Y, Xu M, Shao C, Qu P, Zhang Y, Ye B. Novel strategy to improve the sensing performances of split ATP aptamer based fluorescent indicator displacement assay through enhanced molecular recognition. Biosens Bioelectron 2019; 134:36-41. [PMID: 30954924 DOI: 10.1016/j.bios.2019.03.047] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Revised: 03/19/2019] [Accepted: 03/22/2019] [Indexed: 12/24/2022]
Abstract
Split aptamer strategy was often used to improve the sensitivity of aptasensor. However, traditional split aptamer strategy can not be directly used to improve the label-free aptamer based Thioflavin T (ThT) displacement assay for ATP because the split ATP aptamer display much lower enhancement effects on the fluorescence of ThT than intact aptamer. In order to address this issue, this is the first report using G-rich DNA sequence to enhance the affinity of the two split ATP aptamer halves to ThT and offer lower limit of detection (LOD), wider linear range and higher selectivity through the enhanced molecular recognition. Compared to the intact aptamer/ThT complex, the ensemble of two G-rich split ATP aptamer fragments/ThT are higher fluorescent. Consequently, G-rich sequences would improve the fluorescent signal and thus the sensing performance of the proposed assay. In the optimized conditions, the LOD of the proposed fluorescent ATP aptasensor is 2 nM, which is lower than the reported ThT/ATP aptamer based methods. Additionally, our aptasensor has a wider dynamic linear range (0.1 μM - 120 μM) and higher selectivity. The proposed aptasensor has been successfully applied to detect ATP in 15% human serum. More importantly, the current study not only provides a novel method for ATP assay but also presents a way to construct a label-free split aptamer based fluorescent sensor for other species where aptamer can be generated.
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Affiliation(s)
- Yu Ma
- College of Chemistry and Molecular Engeering, Zhengzhou University, Zhengzhou, 450001, China
| | - Fenghua Geng
- Henan Key Laboratory of Biomolecular Recognition and Sensing, College of Chemistry and Chemical Engeering, Henan Joint International Research Laboratory of Chemo, Biosensing and Early Diagnosis of Major Diseases, Shangqiu Normal University, Shangqiu, 476000, China
| | - Yongxiang Wang
- Henan Key Laboratory of Biomolecular Recognition and Sensing, College of Chemistry and Chemical Engeering, Henan Joint International Research Laboratory of Chemo, Biosensing and Early Diagnosis of Major Diseases, Shangqiu Normal University, Shangqiu, 476000, China; College of Chemistry and Material Science, Huaibei Normal University, Huaibei, 235000, China.
| | - Maotian Xu
- College of Chemistry and Molecular Engeering, Zhengzhou University, Zhengzhou, 450001, China; Henan Key Laboratory of Biomolecular Recognition and Sensing, College of Chemistry and Chemical Engeering, Henan Joint International Research Laboratory of Chemo, Biosensing and Early Diagnosis of Major Diseases, Shangqiu Normal University, Shangqiu, 476000, China
| | - Congying Shao
- College of Chemistry and Material Science, Huaibei Normal University, Huaibei, 235000, China
| | - Peng Qu
- College of Chemistry and Molecular Engeering, Zhengzhou University, Zhengzhou, 450001, China; Henan Key Laboratory of Biomolecular Recognition and Sensing, College of Chemistry and Chemical Engeering, Henan Joint International Research Laboratory of Chemo, Biosensing and Early Diagnosis of Major Diseases, Shangqiu Normal University, Shangqiu, 476000, China
| | - Yintang Zhang
- College of Chemistry and Molecular Engeering, Zhengzhou University, Zhengzhou, 450001, China; Henan Key Laboratory of Biomolecular Recognition and Sensing, College of Chemistry and Chemical Engeering, Henan Joint International Research Laboratory of Chemo, Biosensing and Early Diagnosis of Major Diseases, Shangqiu Normal University, Shangqiu, 476000, China
| | - Baoxian Ye
- College of Chemistry and Molecular Engeering, Zhengzhou University, Zhengzhou, 450001, China
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14
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Transition metal complexes based aptamers as optical diagnostic tools for disease proteins and biomolecules. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2018.09.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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15
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Morris FD, Peterson EM, Heemstra JM, Harris JM. Single-Molecule Kinetic Investigation of Cocaine-Dependent Split-Aptamer Assembly. Anal Chem 2018; 90:12964-12970. [PMID: 30280568 DOI: 10.1021/acs.analchem.8b03637] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Aptamers are short nucleic-acid biopolymers selected to have high affinity and specificity for protein or small-molecule target analytes. Aptamers can be engineered into split-aptamer biosensors comprising two nucleic acid strands that coassemble as they bind to a target, resulting in a large signal change from attached molecular probes (e.g., molecular beacons). The kinetics of split-aptamer assembly and their dependence on target recognition are largely unknown; knowledge of these kinetics could help in design and optimization of split-aptamer biosensors. In this work, we measure assembly kinetics of cocaine-dependent split-aptamer molecules using single-molecule fluorescence imaging. Assembly is monitored between a DNA strand tethered to a glass substrate and solutions containing the other strand tagged with a fluorescent label, with varying concentrations of the cocaine analyte. Dissociation rates are measured by tracking individual molecules and measuring their bound lifetimes. Dissociation-time distributions are biexponential, possibly indicating different folded states of the aptamer. The dissociation rate of only the longer-lived complex decreases with cocaine concentration, suggesting that cocaine stabilizes the long-lived aptamer complex. The variation in the slow dissociation rate with cocaine concentration is well described with an equilibrium-binding model, where the dissociation rate approaches a saturation limit consistent with the dissociation-equilibrium constant for cocaine-binding to the split aptamer. This single-molecule methodology provides a sensitive readout of cocaine-binding based on the dissociation kinetics of the split aptamer, allowing one to distinguish target-dependent aptamer assembly from background assembly. This methodology could be used to study other systems where target association affects the stability of aptamer duplexes.
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Affiliation(s)
- Frances D Morris
- Department of Chemistry , University of Utah , 315 South 1400 East , Salt Lake City , Utah 84112 , United States
| | - Eric M Peterson
- Department of Chemistry , University of Utah , 315 South 1400 East , Salt Lake City , Utah 84112 , United States
| | - Jennifer M Heemstra
- Department of Chemistry , Emory University , 1515 Dickey Drive , Atlanta , Georgia 30322 , United States
| | - Joel M Harris
- Department of Chemistry , University of Utah , 315 South 1400 East , Salt Lake City , Utah 84112 , United States
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16
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Yang R, Liu S, Wu Z, Tan Y, Sun S. Core-shell assay based aptasensor for sensitive and selective thrombin detection using dark-field microscopy. Talanta 2018; 182:348-353. [PMID: 29501163 DOI: 10.1016/j.talanta.2018.01.070] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 01/12/2018] [Accepted: 01/29/2018] [Indexed: 12/15/2022]
Abstract
In this work, we developed a robust and ultrasensitive bio-sensor based on the target-aptamer recognition strategy and microscopic enumeration of gold nanoparticles (AuNPs) using dark field microscopy (DFM). The aptasensor with a core-shell structure consisting of a magnetic bead (MB), aptamer and AuNPs was fabricated by complementary hybridization of the DNA probe on the AuNPs surface to the aptamer coupled to the MB. Upon addition of the target molecule, the strong interaction between the aptamer and the target molecule, thrombin, results in the release of the AuNPs from the MB. The quantities of thrombin is therefore linearly correlated to the number of the released AuNPs, which can be digitally counted using DFM. To demonstrate the feasible use of the aptasensor for target detection, thrombin was evaluated as the model target. The limit of detection was determined to be 2.54 fM with dynamic range of 6 fM-100 fM. When the concentration of thrombin exceeded 100 fM, the counted number of AuNPs didn't correlate linearly to molecules of thrombin anymore, as the nanoparticles aggregated partly due to high concentration. However, the color of the solution changes to purple and the concentration of free AuNPs can be conveniently quantified by UV-Vis spectroscopy for up to 100 nM. It is noteworthy that our aptasensor is very easy to operate and requires neither complex isolation and amplification processes nor expensive instruments and consumables. Furthermore, this strategy can be easily generalized to other targets by replacing the corresponding aptamers and show great potential for the detection of biomarkers in clinical samples.
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Affiliation(s)
- Rui Yang
- Institute of Optical Imaging and Sensing, Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, People's Republic of China
| | - Shuwen Liu
- Department of Chemistry, Tsinghua University, Beijing 100084, People's Republic of China; State Key Laboratory of Chemical Oncogenomics, The Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, People's Republic of China
| | - Zhenjie Wu
- Institute of Optical Imaging and Sensing, Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, People's Republic of China; Department of Physics, Tsinghua University, Beijing 100084, People's Republic of China
| | - Ying Tan
- Department of Chemistry, Tsinghua University, Beijing 100084, People's Republic of China; State Key Laboratory of Chemical Oncogenomics, The Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, People's Republic of China.
| | - Shuqing Sun
- Institute of Optical Imaging and Sensing, Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, People's Republic of China; Department of Physics, Tsinghua University, Beijing 100084, People's Republic of China.
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Fluorescent and colorimetric dual-mode aptasensor for thrombin detection based on target-induced conjunction of split aptamer fragments. Talanta 2017; 180:76-80. [PMID: 29332836 DOI: 10.1016/j.talanta.2017.12.033] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Revised: 10/24/2017] [Accepted: 12/12/2017] [Indexed: 11/21/2022]
Abstract
Since the lack of detection diversity of the single-signal readout strategy, it is urgent to develop fast and multisignal assay strategies. A highly selective and sensitive assay method with colorimetric and fluorometric dual signals readouts is presented in this paper. It is based on the principle that the target induced conjunction of split aptamer fragments assembled on the surface of Au nanoparticles (AuNPs). In the presence of targets, the color of solution changed from wine red to blue and can be measured both visual inspection and spectrophotometry because of the aggregation of AuNPs. At the same time, the report probes which are original hybrid with the anchoring aptamer fragments on the AuNPs surface can be released and recovers the fluorescence. By use of this detection strategy, the limit of detection for thrombin (TMB), as a model of analyte, were 0.45 and 0.16nM, respectively. Furthermore, this protocol can discriminate TMB from other analogue with high selectivity and can be used to detect TMB in human serum samples. The results came from the two signals were well consistent with each other, which demonstrated that it has application potential for detection of TMB in complex matrix.
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18
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Specific Light-Up System for Protein and Metabolite Targets Triggered by Initiation Complex Formation. Sci Rep 2017; 7:15191. [PMID: 29123195 PMCID: PMC5680199 DOI: 10.1038/s41598-017-15697-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Accepted: 11/01/2017] [Indexed: 12/11/2022] Open
Abstract
Gene regulation systems are mimicked by simple quantitative detection of non-nucleic acid molecular targets such as protein and metabolite. Here, we describe a one-tube, one-step real-time quantitative detection methodology for isothermal signal amplification of those targets. Using this system, real-time quantitative detection of thrombin and streptomycin, which were used as examples for protein and metabolite targets, was successfully demonstrated with detection limits of at most 50 pM and 75 nM, respectively. Notably, the dynamic range of target concentrations could be obtained for over four orders of magnitude. Thus, our method is expected to serve as a point-of-care or on-site test for medical diagnosis and food and environmental hygiene.
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Lux J, Vezeridis AM, Hoyt K, Adams SR, Armstrong AM, Sirsi SR, Mattrey RF. Thrombin-Activatable Microbubbles as Potential Ultrasound Contrast Agents for the Detection of Acute Thrombosis. ACS APPLIED MATERIALS & INTERFACES 2017; 9:37587-37596. [PMID: 28994575 PMCID: PMC5691601 DOI: 10.1021/acsami.7b10592] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Acute deep vein thrombosis (DVT) is the formation of a blood clot in the deep veins of the body that can lead to fatal pulmonary embolism. Acute DVT is difficult to distinguish from chronic DVT by ultrasound (US), the imaging modality of choice, and is therefore treated aggressively with anticoagulants, which can lead to internal bleeding. Here we demonstrate that conjugating perfluorobutane-filled (PFB-filled) microbubbles (MBs) with thrombin-sensitive activatable cell-penetrating peptides (ACPPs) could lead to the development of contrast agents that detect acute thrombosis with US imaging. Successful conjugation of ACPP to PFB-filled MBs was confirmed by fluorescence microscopy and flow cytometry. Fluorescein-labeled ACPP was used to evaluate the efficiency of thrombin-triggered cleavage by measuring the mean fluorescence intensity of ACPP-labeled MBs (ACPP-MBs) before and after incubation at 37 °C with thrombin. Lastly, control MBs and ACPP-MBs were infused through a tube containing a clot, and US contrast enhancement was measured with or without the presence of a thrombin inhibitor after washing the clot with saline. With thrombin activity, 91.7 ± 14.2% of the signal was retained after ACPP-MB infusion and washing, whereas only 16.7 ± 4% of the signal was retained when infusing ACPP-MBs in the presence of hirudin, a potent thrombin inhibitor.
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Affiliation(s)
- Jacques Lux
- Department of Radiology, Translational Research in Ultrasound Theranostics (TRUST) Program, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390-8514, United States
| | - Alexander M. Vezeridis
- Department of Radiology, University of California, San Diego, La Jolla, California 92093, United States
| | - Kenneth Hoyt
- Department of Radiology, Translational Research in Ultrasound Theranostics (TRUST) Program, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390-8514, United States
- Department of Bioengineering, University of Texas at Dallas, Richardson, Texas 75080, United States
| | - Stephen R. Adams
- Department of Pharmacology, University of California, San Diego, La Jolla, California 92093, United States
| | - Amanda M. Armstrong
- Department of Radiology, Translational Research in Ultrasound Theranostics (TRUST) Program, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390-8514, United States
| | - Shashank R. Sirsi
- Department of Radiology, Translational Research in Ultrasound Theranostics (TRUST) Program, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390-8514, United States
- Department of Bioengineering, University of Texas at Dallas, Richardson, Texas 75080, United States
| | - Robert F. Mattrey
- Department of Radiology, Translational Research in Ultrasound Theranostics (TRUST) Program, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390-8514, United States
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Kulkarni B, Jayakannan M. Fluorescent-Tagged Biodegradable Polycaprolactone Block Copolymer FRET Probe for Intracellular Bioimaging in Cancer Cells. ACS Biomater Sci Eng 2017; 3:2185-2197. [DOI: 10.1021/acsbiomaterials.7b00426] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Bhagyashree Kulkarni
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Pune, Dr. Homi Bhabha Road, Pune 411008, Maharashtra, India
| | - Manickam Jayakannan
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Pune, Dr. Homi Bhabha Road, Pune 411008, Maharashtra, India
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A highly sensitive and widely adaptable plasmonic aptasensor using berberine for small-molecule detection. Biosens Bioelectron 2017; 97:292-298. [PMID: 28618365 DOI: 10.1016/j.bios.2017.06.019] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Revised: 06/08/2017] [Accepted: 06/09/2017] [Indexed: 01/04/2023]
Abstract
Localized surface plasmon resonance (LSPR) biosensors allow label-free detection of small molecules in molecular binding events; however, they are limited by a relatively low sensitivity and narrow dynamic range. Here, we report highly sensitive small-molecule detection by LSPR peak shift exploiting the G-quadruplex (GQx) structure-binding characteristic of known GQx binders to enhance the LSPR signal of a plasmonic aptasensor. Six known GQx binders (thiazole orange, malachite green, crystal violet, zinc protoporphyrin IX, thioflavin T, and berberine) were tested for their ability to enhance the LSPR signal. Among these, berberine (BER) induced the largest LSPR peak shift by interacting with the GQx structure formed by the aptamer/target binding event on a gold nanorod surface. This specific binding performance was confirmed by the fluorescence signal of BER and through repeated cycles of BER addition and washing on the plasmonic sensing chip. The proposed plasmonic aptasensor respectively showed limit of detection (LOD) of 0.56, 0.63, 0.87 and 1.05 pM for ochratoxin A, aflatoxin B1, adenosine triphosphate and potassium ions, which was 1000-fold higher than that in BER-free condition, and a wide dynamic range from 10 pM to 10μM. In addition, the proposed LSPR aptasensor could effectively be used to quantitatively analyze small molecules in real samples.
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22
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23
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Yang J, Dou B, Yuan R, Xiang Y. Aptamer/Protein Proximity Binding-Triggered Molecular Machine for Amplified Electrochemical Sensing of Thrombin. Anal Chem 2017; 89:5138-5143. [PMID: 28393515 DOI: 10.1021/acs.analchem.7b00827] [Citation(s) in RCA: 93] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The development of convenient and sensitive methods without involving any enzymes or complex nanomaterials for the monitoring of proteins is of great significance in disease diagnostics. In this work, we describe the validation of a new aptamer/protein proximity binding-triggered molecular machinery amplification strategy for sensitive electrochemical assay of thrombin in complex serum samples. The sensing interface is prepared by self-assembly of three-stranded DNA complexes on the gold electrode. The association of two distinct functional aptamers with different sites of thrombin triggers proximity binding-induced displacement of one of the short single-stranded DNAs (ssDNAs) from the surface-immobilized three-stranded DNA complexes, exposing a prelocked toehold domain to hybridize with a methylene blue (MB)-tagged fuel ssDNA strand (MB-DNA). Subsequent toehold-mediated strand displacement by the MB-DNA leads to the release and recycling of the aptamer/protein complexes and the function of the molecular machine. Eventually, a large number of MB-DNA strands are captured by the sensor surface, generating drastically amplified electrochemical responses from the MB tags for sensitive detection of thrombin. Our signal amplified sensor is completely enzyme-free and shows a dynamic range from 5 pM to 1 nM with a detection limit of 1.7 pM. Such sensor also has a high specificity for thrombin assay in serum samples. By changing the affinity probe pairs, the developed sensor can be readily expanded as a more general platform for sensitive detection of different types of proteins.
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Affiliation(s)
- 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
| | - 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
| | - 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
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24
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A label-free colorimetric isothermal cascade amplification for the detection of disease-related nucleic acids based on double-hairpin molecular beacon. Anal Chim Acta 2017; 957:55-62. [DOI: 10.1016/j.aca.2016.12.023] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2016] [Revised: 12/10/2016] [Accepted: 12/16/2016] [Indexed: 11/20/2022]
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25
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Ng S, Lim HS, Ma Q, Gao Z. Optical Aptasensors for Adenosine Triphosphate. Theranostics 2016; 6:1683-702. [PMID: 27446501 PMCID: PMC4955066 DOI: 10.7150/thno.15850] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Accepted: 05/09/2016] [Indexed: 12/16/2022] Open
Abstract
Nucleic acids are among the most researched and applied biomolecules. Their diverse two- and three-dimensional structures in conjunction with their robust chemistry and ease of manipulation provide a rare opportunity for sensor applications. Moreover, their high biocompatibility has seen them being used in the construction of in vivo assays. Various nucleic acid-based devices have been extensively studied as either the principal element in discrete molecule-like sensors or as the main component in the fabrication of sensing devices. The use of aptamers in sensors - aptasensors, in particular, has led to improvements in sensitivity, selectivity, and multiplexing capacity for a wide verity of analytes like proteins, nucleic acids, as well as small biomolecules such as glucose and adenosine triphosphate (ATP). This article reviews the progress in the use of aptamers as the principal component in sensors for optical detection of ATP with an emphasis on sensing mechanism, performance, and applications with some discussion on challenges and perspectives.
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Affiliation(s)
| | | | | | - Zhiqiang Gao
- Department of Chemistry, National University of Singapore, Singapore 117543
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26
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27
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Zhu C, Zhao Y, Yan M, Huang Y, Yan J, Bai W, Chen A. A sandwich dipstick assay for ATP detection based on split aptamer fragments. Anal Bioanal Chem 2016; 408:4151-8. [PMID: 27052777 DOI: 10.1007/s00216-016-9506-z] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Revised: 03/04/2016] [Accepted: 03/21/2016] [Indexed: 12/01/2022]
Abstract
Aptamer-based strip assay is an easy, highly efficient and low-cost detection method, which has been developed and easily applied to onsite detection. A new sensitive sandwich dipstick assay for adenosine triphosphate (ATP) detection was successfully developed based on specific recognition between split aptamer fragments and the target. In this method, the thiolated aptamer was first conjugated to the surface of gold nanoparticles (AuNPs), while the biotin-aptamer was immobilized on the surface of a nitrocellulose filter in the test line. In the presence of ATP, the thiol-aptamer/ATP/biotin-aptamer complexes were generated, which led to an obvious increase in optical signals at the test line. Under the optimal determination conditions, an excellent linear logarithmic response to the ATP concentration was obtained within the range of 0.5 μM to 5 mM. The limit of detection (LOD) of 0.5 μM was reached at a signal-to-noise ratio of 3. The dipstick assay showed a good average recovery of 96-108 % with the RSD of less than 20 % in urine samples. The proposed method exhibited high specificity against other nucleotides such as the uridine triphosphate (UTP), cytidine triphosphate (CTP), and guanosine triphosphate (GTP). The results indicated that the dipstick strip may be considered as an inexpensive screening tool for onsite ATP determination. Graphical Abstract A simple split aptamer fragments based sandwich-type dipstick assay was developed for ATP detection.
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Affiliation(s)
- Chao Zhu
- Institute of Quality Standards and Testing Technology for Agro-products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.,Key Laboratory of Agri-food Quality and Safety, Ministry of Agriculture, Beijing, 100081, China
| | - Yan Zhao
- Institute of Quality Standards and Testing Technology for Agro-products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.,Key Laboratory of Agri-food Quality and Safety, Ministry of Agriculture, Beijing, 100081, China
| | - Mengmeng Yan
- Institute of Quality Standards and Testing Technology for Agro-products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.,Key Laboratory of Agri-food Quality and Safety, Ministry of Agriculture, Beijing, 100081, China
| | - Yafei Huang
- Institute of Quality Standards and Testing Technology for Agro-products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.,Key Laboratory of Agri-food Quality and Safety, Ministry of Agriculture, Beijing, 100081, China.,College of Food Science and Technology, Hainan University, Haikou, Hainan, 570228, China
| | - Jiao Yan
- Institute of Quality Standards and Testing Technology for Agro-products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.,Key Laboratory of Agri-food Quality and Safety, Ministry of Agriculture, Beijing, 100081, China.,College of Food Science and Technology, Hainan University, Haikou, Hainan, 570228, China
| | - Wenhui Bai
- Institute of Quality Standards and Testing Technology for Agro-products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.,Key Laboratory of Agri-food Quality and Safety, Ministry of Agriculture, Beijing, 100081, China
| | - Ailiang Chen
- Institute of Quality Standards and Testing Technology for Agro-products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, 100081, China. .,Key Laboratory of Agri-food Quality and Safety, Ministry of Agriculture, Beijing, 100081, China.
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28
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Chen Z, Tan L, Hu L, Zhang Y, Wang S, Lv F. Real Colorimetric Thrombin Aptasensor by Masking Surfaces of Catalytically Active Gold Nanoparticles. ACS APPLIED MATERIALS & INTERFACES 2016; 8:102-108. [PMID: 26558607 DOI: 10.1021/acsami.5b08975] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We presented a simple, cost-effective, and ultrasensitive colorimetric approach for visually detecting thrombin by the catalytic amplification of gold nanoparticles (AuNPs) and aptamer-thrombin recognition. Thrombin can be quantified in the presence of catalytic AuNP surface by using color-change time of 4-nitrophenol. Without thrombin, yellow 4-nitrophenol can freely access the surface of AuNP and becomes colorless 4-aminophenol. With the addition of thrombin, aptamer-thrombin with large size interaction masks the partial surfaces of AuNPs, and increases the reduction time of 4-nitrophenol to 4-aminophenol. The maximum number of bound thrombin fully mask the catalytic AuNP surface, and thus 4-nitrophenol cannot approach to AuNP surface, the color of the solution remains yellow. The limit of detection (LOD) of 0.1 nM can be achieved with naked eyes. Of note, the method was further applied for the detection of thrombin in human serum samples, showing the results in agreement with those values obtained in an immobilization buffer by the colorimetric method.
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Affiliation(s)
- Zhengbo Chen
- Department of Chemistry, Capital Normal University , Beijing 100048, China
| | - Lulu Tan
- Department of Chemistry, Capital Normal University , Beijing 100048, China
| | - Liangyu Hu
- Department of Chemistry, Capital Normal University , Beijing 100048, China
| | - Yimeng Zhang
- Department of Chemistry, Capital Normal University , Beijing 100048, China
| | - Shaoxiong Wang
- Department of Chemistry, Capital Normal University , Beijing 100048, China
| | - Fanyi Lv
- Department of Chemistry, Capital Normal University , Beijing 100048, China
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29
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Li J, Hu X, Shi S, Zhang Y, Yao T. Three label-free thrombin aptasensors based on aptamers and [Ru(bpy)2(o-mopip)]2+. J Mater Chem B 2016; 4:1361-1367. [DOI: 10.1039/c5tb02032h] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The label free aptasensor based on an aptamer pair and [Ru(bpy)2(o-mopip)]2+–GO has been successfully applied to sandwich assays for thrombin detection.
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Affiliation(s)
- Juanjuan Li
- Shanghai Key Lab of Chemical Assessment and Sustainability
- Department of Chemistry
- Tongji University Shanghai
- P. R. China
| | - Xiaochun Hu
- Shanghai Key Lab of Chemical Assessment and Sustainability
- Department of Chemistry
- Tongji University Shanghai
- P. R. China
| | - Shuo Shi
- Shanghai Key Lab of Chemical Assessment and Sustainability
- Department of Chemistry
- Tongji University Shanghai
- P. R. China
| | - Yiwei Zhang
- Shanghai Key Lab of Chemical Assessment and Sustainability
- Department of Chemistry
- Tongji University Shanghai
- P. R. China
| | - Tianming Yao
- Shanghai Key Lab of Chemical Assessment and Sustainability
- Department of Chemistry
- Tongji University Shanghai
- P. R. China
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30
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Shrivastava S, Sohn IY, Son YM, Lee WI, Lee NE. Real-time label-free quantitative fluorescence microscopy-based detection of ATP using a tunable fluorescent nano-aptasensor platform. NANOSCALE 2015; 7:19663-19672. [PMID: 26553481 DOI: 10.1039/c5nr05839b] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Although real-time label-free fluorescent aptasensors based on nanomaterials are increasingly recognized as a useful strategy for the detection of target biomolecules with high fidelity, the lack of an imaging-based quantitative measurement platform limits their implementation with biological samples. Here we introduce an ensemble strategy for a real-time label-free fluorescent graphene (Gr) aptasensor platform. This platform employs aptamer length-dependent tunability, thus enabling the reagentless quantitative detection of biomolecules through computational processing coupled with real-time fluorescence imaging data. We demonstrate that this strategy effectively delivers dose-dependent quantitative readouts of adenosine triphosphate (ATP) concentration on chemical vapor deposited (CVD) Gr and reduced graphene oxide (rGO) surfaces, thereby providing cytotoxicity assessment. Compared with conventional fluorescence spectrometry methods, our highly efficient, universally applicable, and rational approach will facilitate broader implementation of imaging-based biosensing platforms for the quantitative evaluation of a range of target molecules.
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Affiliation(s)
- Sajal Shrivastava
- School of Advanced Materials Science & Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Korea.
| | - Il-Yung Sohn
- School of Advanced Materials Science & Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Korea.
| | - Young-Min Son
- School of Advanced Materials Science & Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Korea.
| | - Won-Il Lee
- School of Advanced Materials Science & Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Korea.
| | - Nae-Eung Lee
- School of Advanced Materials Science & Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Korea. and SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Korea
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31
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Zhu Y, Hu XC, Shi S, Gao RR, Huang HL, Zhu YY, Lv XY, Yao TM. Ultrasensitive and universal fluorescent aptasensor for the detection of biomolecules (ATP, adenosine and thrombin) based on DNA/Ag nanoclusters fluorescence light-up system. Biosens Bioelectron 2015; 79:205-12. [PMID: 26706942 DOI: 10.1016/j.bios.2015.12.015] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2015] [Revised: 12/07/2015] [Accepted: 12/10/2015] [Indexed: 10/22/2022]
Abstract
We report here an ultrasensitive strategy based on the recognition-induced conformational alteration of aptamer and fluorescence turn-on abilities of guanine-rich (G-rich) DNA sequence in proximity to silver nanoclusters for adenosine triphosphate (ATP), adenosine (A) and thrombin (TB) detection. Herein, we designed two tailored DNA sequences noted as complementary DNA (abbreviated as c-DNA) and signal probe DNA (abbreviated as s-DNA), respectively. c-DNA is designed as a special structure consisting of a sequence complementary to aptamer at the 3'-end and a guanine-rich DNA sequence at the 5'-end; s-DNA contains a cytosine-rich sequence responsible for Ag NCs templated synthesis at the 3'-end and a link sequence (part of aptamer) complementary to partial of the c-DNA at the 5'-end. In the presence of target, the aptamer associated with the target, resulting in the formation of duplex DNA (dsDNA), the DNA-Ag NCs thereafter could close to the guanine-rich sequence, leading to enhanced fluorescence signal readout. The widespread application of the sensing system is achieved success in the detection of three biomolecules. ATP, adenosine and thrombin in the range of 0.5-8.0 μM, 0.5-7.0 μM and 50-900 nM could be linearly detected with the detection limits of 91.6 nM, 103.4 nM and 8.4 nM, respectively. This label-free and turn-on fluorescent sensing system employing the mechanism proposed here turns out to be sensitive, selective, and convenient for the detection of biomolecules without washing and separation steps.
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Affiliation(s)
- Ying Zhu
- Department of Chemistry, and Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, Shanghai 200092, China
| | - Xiao-Chun Hu
- Department of Chemistry, and Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, Shanghai 200092, China
| | - Shuo Shi
- Department of Chemistry, and Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, Shanghai 200092, China.
| | - Ru-Ru Gao
- Department of Chemistry, and Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, Shanghai 200092, China
| | - Hai-Liang Huang
- Department of Chemistry, and Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, Shanghai 200092, China
| | - Yan-Yan Zhu
- Department of Chemistry, and Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, Shanghai 200092, China
| | - Xiao-Yan Lv
- Department of Chemistry, and Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, Shanghai 200092, China
| | - Tian-Ming Yao
- Department of Chemistry, and Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, Shanghai 200092, China.
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Zhu Q, Liu G, Kai M. DNA Aptamers in the Diagnosis and Treatment of Human Diseases. Molecules 2015; 20:20979-97. [PMID: 26610462 PMCID: PMC6332121 DOI: 10.3390/molecules201219739] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Revised: 11/16/2015] [Accepted: 11/16/2015] [Indexed: 02/07/2023] Open
Abstract
Aptamers have a promising role in the field of life science and have been extensively researched for application as analytical tools, therapeutic agents and as vehicles for targeted drug delivery. Compared with RNA aptamers, DNA aptamers have inherent advantages in stability and facility of generation and synthesis. To better understand the specific potential of DNA aptamers, an overview of the progress in the generation and application of DNA aptamers in human disease diagnosis and therapy are presented in this review. Special attention is given to researches that are relatively close to practical application. DNA aptamers are expected to have great potential in the diagnosis and treatment of human diseases.
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Affiliation(s)
- Qinchang Zhu
- Faculty of Pharmaceutical Sciences, Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan.
| | - Ge Liu
- Department of Genomic Epidemiology, Research Center for Environment and Developmental Medical Sciences, Kyushu University, 3-1-1 Maidashi, Fukuoka 812-8582, Japan.
| | - Masaaki Kai
- Faculty of Pharmaceutical Sciences, Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan.
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Huang Y, Song C, Li H, Zhang R, Jiang R, Liu X, Zhang G, Fan Q, Wang L, Huang W. Cationic Conjugated Polymer/Hyaluronan-Doxorubicin Complex for Sensitive Fluorescence Detection of Hyaluronidase and Tumor-Targeting Drug Delivery and Imaging. ACS APPLIED MATERIALS & INTERFACES 2015; 7:21529-21537. [PMID: 26331442 DOI: 10.1021/acsami.5b06799] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Hyaluronidase (HAase) is becoming a new type of tumor marker since it has been demonstrated to be overexpressed in various kinds of cancer cells. In this study, we described a novel fluorescence method for sensitive, rapid, and convenient HAase detection and tumor-targeting drug delivery and imaging, using a probe prepared by electrostatic assembly of a cationic conjugated polymer (CCP) and anionic hyaluronan (HA) conjugated with the anticancer drug doxorubicin (Dox). The CCP we used was poly{[9,9-bis(6'-(N,N,N-diethylmethylammonium)hexyl)-2,7-fluorenylene ethynylene]-alt-co-[2,5-bis(3'-(N,N,N-diethylmethylammonium)-1'-oxapropyl)-1,4-phenylene]} tetraiodide (PFEP). HA is a natural mucopolysaccharide that can be hydrolyzed by HAase into fragments with low molecular weights. In the PFEP/HA-Dox complex, the fluorescence of PFEP was efficiently quenched due to electron transfer from PFEP to Dox. After the PFEP/HA-Dox complex was exposed to HAase or was taken up by cancer cells through the specific binding between HA and CD44 receptor, HA was degraded by HAase to release the Dox, leading to the recovery of PFEP fluorescence to the "turn-on" state. Moreover, the degree of fluorescence recovery was quantitatively correlated with the concentrations of HAase. Compared with many previously reported methods, our work did not require laborious multiple modifications of HA that may affect the activity of HAase. This point, combined with the excellent optoelectronic property of conjugated polymer, endowed this method with high sensitivity (detection limit: 0.075 U/mL), high specificity, and rapid response, making it applicable for reliable and routine detection of HAase. This fluorescent probe was successfully utilized to detect HAase levels in human urine samples; furthermore, it can also be employed as a multifunctional system by realizing tumor-targeting drug delivery and cell imaging simultaneously. The development of this fluorescence method showed promising potential for early tumor diagnosis and therapy based on HAase detection.
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Affiliation(s)
- Yanqin Huang
- Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications , Nanjing 210023, China
| | - Caixia Song
- Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications , Nanjing 210023, China
| | - Huichang Li
- Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications , Nanjing 210023, China
| | - Rui Zhang
- Department of Ophthalmology, Zhongda Hospital, Southeast University , Nanjing 211189, China
| | - Rongcui Jiang
- Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications , Nanjing 210023, China
| | - Xingfen Liu
- Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications , Nanjing 210023, China
| | - Guangwei Zhang
- Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications , Nanjing 210023, China
| | - Quli Fan
- Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications , Nanjing 210023, China
| | - Lianhui Wang
- Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications , Nanjing 210023, China
| | - Wei Huang
- Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications , Nanjing 210023, China
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech) , 30 South Puzhu Road, Nanjing 211816, China
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Liu X, Hua X, Fan Q, Chao J, Su S, Huang YQ, Wang L, Huang W. Thioflavin T as an Efficient G-Quadruplex Inducer for the Highly Sensitive Detection of Thrombin Using a New Föster Resonance Energy Transfer System. ACS APPLIED MATERIALS & INTERFACES 2015; 7:16458-16465. [PMID: 26173915 DOI: 10.1021/acsami.5b03662] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We report a new Föster resonance energy transfer (FRET) system that uses a special dye, thioflavin T (ThT), as an energy acceptor and a water-soluble conjugated polymer (CP) with high fluorescence as an energy donor. A simple, label-free, and sensitive strategy for the detection of thrombin in buffer and in diluted serum was designed based on this new system using ThT as an efficient inducer of the G-quadruplex. The difference between the blank and the positive samples was amplified due to distinctive FRET signals because thrombin has little effect on the intercalation of ThT into the G-quadruplex. In the absence of the target, ThT induces the aptamer to form a G-quadruplex and intercalates into it with strong fluorescence. The electrostatic attractions between the negatively charged G-quadruplex and positively charged CP allow a short donor-acceptor distance, resulting in a high FRET signal. However, in the presence of the target, the aptamer forms a G-quadruplex-thrombin complex first, followed by the intercalation of ThT into the G-quadruplex. A long distance exists between the donor and acceptor due to the strong steric hindrance from the large-sized thrombin, which leads to a low FRET signal. Compared with previously reported strategies based on the FRET between the CP and dye, our strategy is label-free, and the sensitivity was improved by an order of magnitude. Our strategy also shows the advantages of being simple, rapid (about 50 min), sensitive, label-free, and low-cost in comparison to strategies based on the FRET between quantum dots and dyes.
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Mao Y, Liu J, He D, He X, Wang K, Shi H, Wen L. Aptamer/target binding-induced triple helix forming for signal-on electrochemical biosensing. Talanta 2015; 143:381-387. [PMID: 26078174 DOI: 10.1016/j.talanta.2015.05.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Revised: 04/28/2015] [Accepted: 05/04/2015] [Indexed: 12/27/2022]
Abstract
Owing to its diversified structures, high affinity, and specificity for binding a wide range of non-nucleic acid targets, aptamer is a useful molecular recognition tool for the design of various biosensors. Herein, we report a new signal-on electrochemical biosensing platform which is based on an aptamer/target binding-induced strand displacement and triple-helix forming. The biosensing platform is composed of a signal transduction probe (STP) modified with a methylene blue (MB) and a sulfhydryl group, a triplex-forming oligonucleotides probe (TFO) and a target specific aptamer probe (Apt). Through hybridization with the TFO probe and the Apt probe, the self-assembled STP on Au electrode via Au-S bonding keeps its rigid structure. The MB on the STP is distal to the Au electrode surface. It is eT off state. Target binding releases the Apt probe and liberates the end of the MB tagged STP to fold back and form a triplex-helix structure with TFO (STP/TFO/STP), allowing MB to approach the Au electrode surface and generating measurable electrochemical signals (eT ON). As test for the feasibility and universality of this signal-on electrochemical biosensing platform, two aptamers which bind to adenosine triphosphate (ATP) and human α-thrombin (Tmb), respectively, are selected as models. The detection limit of ATP was 7.2 nM, whereas the detection limit of Tmb was 0.86 nM.
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Affiliation(s)
- Yinfei Mao
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha 410082, PR China
| | - Jinquan Liu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha 410082, PR China
| | - Dinggen He
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha 410082, PR China
| | - Xiaoxiao He
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha 410082, PR China.
| | - Kemin Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha 410082, PR China.
| | - Hui Shi
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha 410082, PR China
| | - Li Wen
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha 410082, PR China
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Liu X, Yang Y, Hua X, Feng X, Su S, Huang Y, Fan Q, Wang L, Huang W. An Improved Turn-On Aptasensor for Thrombin Detection Using Split Aptamer Fragments and Graphene Oxide. CHINESE J CHEM 2015. [DOI: 10.1002/cjoc.201500123] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Water-soluble hyperbranched poly(phenyleneethynylene)s: Facile synthesis, characterization, and interactions with dsDNA. POLYMER 2015. [DOI: 10.1016/j.polymer.2014.12.068] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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Zhang P, Zhuo S, Sun L, Zhang P, Zhu C. Determination of gamma-globulin at nanogram levels by its quenching effect on the fluorescence of a red emitting conjugated polymer. NEW J CHEM 2015. [DOI: 10.1039/c5nj00286a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A novel red emitting fluorescence sensor has been constructed and used for the selective assay of gamma-globulin in the presence of serum albumin.
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Affiliation(s)
- Ping Zhang
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Key Laboratory of Chemo-Biosensing
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Shujuan Zhuo
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Key Laboratory of Chemo-Biosensing
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Lilin Sun
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Key Laboratory of Chemo-Biosensing
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Ping Zhang
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Key Laboratory of Chemo-Biosensing
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Changqing Zhu
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Key Laboratory of Chemo-Biosensing
- College of Chemistry and Materials Science
- Anhui Normal University
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Yang J, Ma M, Li L, Zhang Y, Huang W, Dong X. Graphene nanomesh: new versatile materials. NANOSCALE 2014; 6:13301-13313. [PMID: 25308060 DOI: 10.1039/c4nr04584j] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Graphene, an atomic-scale honeycomb crystal lattice, is increasingly becoming popular because of its excellent mechanical, electrical, chemical, and physical properties. However, its zero bandgap places restrictions on its applications in field-effect transistors (FETs). Graphene nanomesh (GNM), a new graphene nanostructure with a tunable bandgap, shows more excellent performance. It can be widely applied in electronic or photonic devices such as highly sensitive biosensors, new generation of spintronics and energy materials. These illustrate significant opportunities for the industrial use of GNM, and hence they push nanoscience and nanotechnology one step toward practical applications. This review briefly describes the current status of the design, synthesis, and potential applications of GNM. Finally, the perspectives and challenges of GNM development are presented and some suggestions are made for its further development and exploration.
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Affiliation(s)
- Jun Yang
- Jiangsu-Singapore Joint Research Center for Organic/Bio-Electronics & Information Displays and Institute of Advanced Materials (IAM), Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, China
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Huang Y, Yao X, Zhang R, Ouyang L, Jiang R, Liu X, Song C, Zhang G, Fan Q, Wang L, Huang W. Cationic conjugated polymer/fluoresceinamine-hyaluronan complex for sensitive fluorescence detection of CD44 and tumor-targeted cell imaging. ACS APPLIED MATERIALS & INTERFACES 2014; 6:19144-19153. [PMID: 25278260 DOI: 10.1021/am505113p] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Simple, rapid, and sensitive detection of CD44 is of paramount importance since it plays pivotal roles in tumor initiation, growth and metastasis. Herein, we describe a novel method for sensitive, visual and facile fluorescence detection of CD44 and CD44-mediated cancer cell imaging, using a probe based on cationic conjugated polymer (CCP)-PFEP and fluoresceinamine-hyaluronan (FA-HA). HA is an anionic natural glycosaminoglycan that can specifically bind to the overexpressed CD44 on various kinds of cancer cells. PFEP and FA-HA formed a complex through electronic interactions, resulting in a highly efficient fluorescence resonance energy transfer (FRET) from PFEP to FA-HA; moreover, the efficiencies of FRET correlated with the concentrations of CD44 because the specific binding of HA-CD44 would separate FA-HA away from PFEP. This method did not require laborious and expensive dual-labeling or protein-labeling needed in previously reported detection methods of CD44. Just mix the sample and test solution containing the PFEP/FA-HA complex, and the results allowed naked-eye detection by observing fluorescent color of solutions with the assistance of a UV lamp. Most importantly, the use of a conjugated polymer with excellent amplification property as well as the specific binding of HA-CD44 endowed this method with high sensitivity and specificity, making it applicable for reliable quantitative detection of CD44. Furthermore, the PFEP/FA-HA complex formed nanoparticles in aqueous solution, and the nanoparticles can be selectively taken up by MCF-7 cells (cancer cell) through the HA-CD44 interaction, thereby giving rise to a dual-color tumor-targeted imaging probe with good photostability. The development of this fluorescent probe showed promising potential to make a reliable and routine method available for early diagnosis of cancer.
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Affiliation(s)
- Yanqin Huang
- Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications , Nanjing 210023, China
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