1
|
Luo Q, Zhang C, Deng X, Liu D, Pan X, Gong Y, Tang Q, Zhang K, Liao X. A CRISPR-Cas12a-based electrochemical biosensor for the detection of microphthalmia-associated transcription factor. Mikrochim Acta 2024; 191:73. [PMID: 38170285 DOI: 10.1007/s00604-023-06164-5] [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: 11/26/2023] [Accepted: 12/20/2023] [Indexed: 01/05/2024]
Abstract
A novel electrochemical biosensor that combines the CRISPR-Cas12a system with a gold electrode is reported for the rapid and sensitive detection of microphthalmia-associated transcription factor (MITF). The biosensor consists of a gold electrode modified with DNA1, which contains the target sequence of MITF and is labeled with ferrocene, an electroactive molecule. The biosensor also includes hairpin DNA, which has a binding site for MITF and can hybridize with helper DNA to form a double-stranded complex that activates CRISPR-Cas12a. When MITF is present, it binds to hairpin DNA and prevents its hybridization with helper DNA, thus inhibiting CRISPR-Cas12a activity and preserving the DPV signal of ferrocene. When MITF is absent, hairpin DNA hybridizes with helper DNA and activates CRISPR-Cas12a, which cleaves DNA1 and releases ferrocene, thus reducing the DPV signal. The biosensor can detect MITF with high sensitivity (with an LOD of 8.14 fM), specificity, and accuracy in various samples, such as cell nuclear extracts and human serum. The biosensor can also diagnose and monitor melanocyte-related diseases and melanin production. This work provides a simple, fast, sensitive, and cost-effective biosensor for MITF detection and a valuable tool for applications in genetic testing, disease diagnosis, and drug screening.
Collapse
Affiliation(s)
- Qisheng Luo
- The Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, 533000, Guangxi, China
| | - Chunyuan Zhang
- The Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, 533000, Guangxi, China
| | - Xiandong Deng
- The Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, 533000, Guangxi, China
| | - Dongyuan Liu
- The Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, 533000, Guangxi, China
| | - Xingchen Pan
- The Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, 533000, Guangxi, China
| | - Yuanxun Gong
- The Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, 533000, Guangxi, China
| | - Qianli Tang
- The Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, 533000, Guangxi, China.
| | - Kai Zhang
- School of Chemistry and Materials Science, Nanjing University of Information Science and Technology, Nanjing, 210044, People's Republic of China.
| | - Xianjiu Liao
- West Guangxi Key Laboratory for Prevention and Treatment of High-Incidence Diseases, Youjiang Medical University for Nationalities, Guangxi, Baise, 533000, China.
| |
Collapse
|
2
|
An exonuclease protection and CRISPR/Cas12a integrated biosensor for the turn-on detection of transcription factors in cancer cells. Anal Chim Acta 2021; 1165:338478. [PMID: 33975701 DOI: 10.1016/j.aca.2021.338478] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Accepted: 03/30/2021] [Indexed: 02/07/2023]
Abstract
Transcription factors (TFs) are critical proteins that regulate the expression of genes, and the abnormal change of TFs levels is directly related to physical dysfunctions. Herein, we developed a clustered regularly interspaced short palindromic repeats (CRISPR)-based biosensor for the measurement of TFs level with the assistance of exonuclease protection assay. A dsDNA (activator) with the ability to activate Cas12a was engineered to contain TFs binding domain, and the binding between TFs and the activator can protect the dsDNA from being digested by exonuclease III (Exo III). The reserved activator then triggered a CRISPR/Cas12a reporting reaction to produce fluorescent signal for detection. In the detection of nuclear factor-kappa B (NF-κB) p50 subunit, the limit of detection of 0.2 pM and limit of quantification of 0.6 pM were obtained respectively, and the performance of this biosensor has been challenged by cell nucleoprotein extracts. Additionally, this method can be applied in the screening and evaluation of TFs inhibitors, calculating the IC50 of oridonin. Integrating merits including high sensitivity, low cost, and good portability, this method may enrich the arsenal for TFs-related applications.
Collapse
|
3
|
Li B, Xie S, Xia A, Suo T, Huang H, Zhang X, Chen Y, Zhou X. Recent advance in the sensing of biomarker transcription factors. Trends Analyt Chem 2020. [DOI: 10.1016/j.trac.2020.116039] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
|
4
|
Bidar N, Oroojalian F, Baradaran B, Eyvazi S, Amini M, Jebelli A, Hosseini SS, Pashazadeh-Panahi P, Mokhtarzadeh A, de la Guardia M. Monitoring of microRNA using molecular beacons approaches: Recent advances. Trends Analyt Chem 2020. [DOI: 10.1016/j.trac.2020.116021] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
|
5
|
Li D, Li Y, Luo F, Qiu B, Lin Z. Ultrasensitive Homogeneous Electrochemiluminescence Biosensor for a Transcription Factor Based on Target-Modulated Proximity Hybridization and Exonuclease III-Powered Recycling Amplification. Anal Chem 2020; 92:12686-12692. [DOI: 10.1021/acs.analchem.0c03086] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Dan Li
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China
| | - Ya Li
- Department of Ultrasound, Fourth People’s Hospital of Taizhou City, Jianshu, 225300, China
| | - Fang Luo
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China
- College of Biological Science and Engineering, Fuzhou University, Fuzhou, Fujian 350116, China
| | - Bin Qiu
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China
| | - Zhenyu Lin
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China
| |
Collapse
|
6
|
Yasun E, Neff B, Trusty T, Boskic L, Mezić I. Electrokinetic mixing in electrode-embedded multiwell plates to improve the diffusion limited kinetics of biosensing platforms. Anal Chim Acta 2020; 1106:79-87. [PMID: 32145858 DOI: 10.1016/j.aca.2020.02.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2019] [Revised: 01/13/2020] [Accepted: 02/03/2020] [Indexed: 12/13/2022]
Abstract
Rapid and accurate biosensing with low concentrations of the analytes is usually challenged by the diffusion limited reaction kinetics. Thus, as a remedy, long incubation times or excess amounts of the reagents are employed to ensure the reactions to go to completion. Therefore, mixing becomes both a serious problem and necessity to overcome that diffusion limitation and homogenize the samples, especially for the biochemical reactions that take place in multiwell plates. Because the current mixing platforms such as shakers/vortexers, sonicators, magnetic stirrers and acoustic mixers have disadvantages including, but not limited to, being invasive/harfmul to the samples, causing the samples to splash out or stick to the walls of the wells and allowing foreign compartments to enter the solutions in the wells. Here we propose a noninvasive and safer (considering the risk of sample loss) technology that provides electrokinetic-mixing (EKM) of the reagents placed in electrode-embedded multiwell plates where the incubation times, or in other words, the time required for the desired molecules to meet in stationary solutions, can be reduced substantially. In order to demonstrate the power of this innovation, in this specific case, a simple Förster resonance energy transfer (FRET) based quenching bioplatform was adopted, where a molecular beacon DNA (MB) modified with sulfhydryl (-SH) and fluorescein (FITC) dye at opposite terminals was incubated with 10 nm sized gold nanoparticles (AuNPs) in the wells of an electrode-embedded multiwell plate, in which a printed circuit board (PCB) was attached at the bottom to control the liquid flows by EKM. When the MB binds to AuNPs through thiolate chemistry in the solution, FITC dye comes in close proximity to the AuNP surface and the emission is quenched via FRET principle. Thus, this quenching percentage over time was our comparison parameter for the mixing and no mixing cases to demonstrate the impact of mixing on the quenching kinetics. This reaction was conducted with different concentrations of AuNPs to observe the impact of mixing on MB quenching kinetics when the concentrations of the AuNPs were increased. Total quenching efficiency could go up to 90% in the presence of the AuNPs and it took about 60 min to reach stability. When the EKM was involved, fluorescence quenching time for the MBs could be reduced by up to 4.1 times. Thus, it was demonstrated that this technology may improve the kinetics of the diffusion limited biological reactions take place in multiwell plates substantially so that it may be adopted in various different sensing platforms for rapid measurements.
Collapse
Affiliation(s)
- Emir Yasun
- Department of Mechanical Engineering and Biological Nanostructures Laboratory, California NanoSystems Institute (CNSI), University of California, Santa Barbara, Santa Barbara, CA, 93106, USA.
| | - Baptiste Neff
- Department of Mechanical Engineering and Biological Nanostructures Laboratory, California NanoSystems Institute (CNSI), University of California, Santa Barbara, Santa Barbara, CA, 93106, USA
| | - Travis Trusty
- Department of Mechanical Engineering and Biological Nanostructures Laboratory, California NanoSystems Institute (CNSI), University of California, Santa Barbara, Santa Barbara, CA, 93106, USA
| | - Ljuboslav Boskic
- Department of Mechanical Engineering and Biological Nanostructures Laboratory, California NanoSystems Institute (CNSI), University of California, Santa Barbara, Santa Barbara, CA, 93106, USA
| | - Igor Mezić
- Department of Mechanical Engineering and Biological Nanostructures Laboratory, California NanoSystems Institute (CNSI), University of California, Santa Barbara, Santa Barbara, CA, 93106, USA.
| |
Collapse
|
7
|
Cyclic enzymatic amplification method for highly sensitive detection of nuclear factor-kappa B. Anal Chim Acta 2019; 1068:80-86. [DOI: 10.1016/j.aca.2019.03.059] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 03/27/2019] [Accepted: 03/28/2019] [Indexed: 12/11/2022]
|
8
|
Qin Y, Li D, Yuan R, Xiang Y. Silver ion-stabilized DNA triplexes for completely enzyme-free and sensitive fluorescence detection of transcription factors via catalytic hairpin assembly amplification. J Mater Chem B 2019; 7:763-767. [DOI: 10.1039/c8tb03042a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new silver ion-stabilized DNA triplex enables enzyme-free and amplified sensitive fluorescence detection of transcription factors.
Collapse
Affiliation(s)
- Yao Qin
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
| | - Daxiu Li
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
| | - Ruo Yuan
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
| | - Yun Xiang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
| |
Collapse
|
9
|
Yeasmin Khusbu F, Zhou X, Chen H, Ma C, Wang K. Thioflavin T as a fluorescence probe for biosensing applications. Trends Analyt Chem 2018. [DOI: 10.1016/j.trac.2018.09.013] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
|
10
|
Wang C, Tang G, Tan H. Pyrophosphate ion-triggered competitive displacement of ssDNA from a metal-organic framework and its application in fluorescent sensing of alkaline phosphatase. J Mater Chem B 2018; 6:7614-7620. [PMID: 32254883 DOI: 10.1039/c8tb02175a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Nanomaterial/aptamer assembly has been extensively explored in the detection of various targets, but some limitations still exist in its practical applications, especially time consumption and low-efficient detachment of the aptamer from the nanomaterial surface. In this work, we demonstrated the ligand role of pyrophosphate ion (PPi) in the competitive displacement of ssDNA from the nanoscaffold surface. For this purpose, a fluorescein-labeled ssDNA (F-DNA) and a mixed valence state cerium (Ce3+/Ce4+)-based MOF (MVCM) were employed as the signal response unit and nanoscaffold, respectively. Benefiting from the existence of Ce4+, the MVCM exhibits an ultrahigh quenching efficiency (more than 90%) to F-DNA fluorescence, which is 3-fold higher than that of the MOF with Ce3+ only. However, it was found that PPi can effectively suppress the quenching effect of the MVCM by competitive coordination with the MVCM to displace F-DNA. Different from the conventional target-induced conformational change of aptamers, the PPi-triggered displacement assay is independent of the ssDNA sequence and can be rapidly completed in just 2 min. The displacement assay is also highly sensitive, even at a PPi concentration as low as 55 nM. In contrast to PPi, however, the phosphate ions and other anions cannot displace F-DNA from the MVCM surface to switch on the F-DNA fluorescence. Inspired by this fact, the PPi-triggered displacement assay was further applied in the detection of alkaline phosphatase (ALP). The detection limit toward ALP was obtained at 0.18 mU mL-1. Moreover, the accurate determination of ALP concentration in serum samples indicates the applicability of this sensing system in detecting real samples.
Collapse
Affiliation(s)
- Caihong Wang
- Key Laboratory of Chemical Biology of Jiangxi Province, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, 330022, P. R. China.
| | | | | |
Collapse
|
11
|
Xu X, Wang L, Zhu D, Wang Y, Jiang W. Protein binding protection in combination with DNA masking for sensitive and reliable transcription factor detection. Talanta 2018; 186:293-298. [DOI: 10.1016/j.talanta.2018.04.047] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Revised: 04/04/2018] [Accepted: 04/15/2018] [Indexed: 10/17/2022]
|
12
|
Yang Q, Zhou L, Wu YX, Zhang K, Cao Y, Zhou Y, Wu D, Hu F, Gan N. A two dimensional metal-organic framework nanosheets-based fluorescence resonance energy transfer aptasensor with circular strand-replacement DNA polymerization target-triggered amplification strategy for homogenous detection of antibiotics. Anal Chim Acta 2018; 1020:1-8. [PMID: 29655419 DOI: 10.1016/j.aca.2018.02.058] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Revised: 02/13/2018] [Accepted: 02/19/2018] [Indexed: 12/14/2022]
Abstract
In the study, a novel two dimensional metal-organic framework (Cu-TCPP nanosheets) based fluorescence resonance energy transfer (FRET) aptasensing platform was developed for detecting antibiotics. Cu-TCPP nanosheets were employed for quenching the background fluorescence and circular strand-replacement DNA polymerization (CSRP) for signal amplification. To fulfill the purpose, we designed an aptamer hairpin probe (HP) whose stem can be opened while specifically binding to target. Then the opened HP would bind with the primer. Under the action of polymerase, extension reaction was induced to generate double-stranded DNA (dsDNA), and then the target was released for the next cycle. Finally, SYBR Green I (SG) can bind with dsDNA to produce strong fluorescence response for quantification of target. It's worth mentioning that the fluorescence of HP/SG complex and free SG could be completely quenched by Cu-TCPP nanosheets while that of dsDNA/SG complex wouldn't be affected. Thus, the sensor produced negligible background signals. It can produce 7.5-fold improved S/N compared to a graphene oxide (GO)-based FRET aptasensor. Chloramphenicol (CAP) was chosen as the model analyte to demonstrate the feasibility of the sensor system. The detection range is broad from 0.001 to 10 ng mL-1 with a detection limit down to 0.3 pg mL-1. The proposed assay was label free and can be used in homogenous detection which greatly simplifies the complexity of operations. The strategy opens a new way to develop sensitive, in-situ and simple assay for antibiotics in foods.
Collapse
Affiliation(s)
- Qian Yang
- Faculty of Material Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China
| | - Lingying Zhou
- Faculty of Material Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China
| | - Yong-Xiang Wu
- Faculty of Material Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China
| | - Kai Zhang
- Faculty of Marine Science, Ningbo University, Ningbo, 315211, China
| | - Yuting Cao
- Faculty of Material Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China
| | - You Zhou
- Faculty of Material Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China
| | - Dazhen Wu
- Faculty of Material Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China
| | - Futao Hu
- Faculty of Marine Science, Ningbo University, Ningbo, 315211, China
| | - Ning Gan
- Faculty of Material Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China.
| |
Collapse
|
13
|
Bertucci A, Guo J, Oppmann N, Glab A, Ricci F, Caruso F, Cavalieri F. Probing transcription factor binding activity and downstream gene silencing in living cells with a DNA nanoswitch. NANOSCALE 2018; 10:2034-2044. [PMID: 29323382 DOI: 10.1039/c7nr07814e] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Transcription factor DNA binding activity is of pivotal importance in living systems because of its primary involvement in the regulation of genetic machinery. The analysis of transient expression levels of transcription factors in response to a certain cell status is a powerful means for investigating cellular dynamics at the biomolecular level. Herein, a DNA-based molecular switch that enables probing of transcription factor DNA binding activity is directly used in living cells. We demonstrate that the DNA nanoswitch allows for dynamic fluorescence imaging of NF-κB and quantification of downstream gene silencing in real time. The present strategy is based on a functional DNA nanodevice that transduces, through a binding-induced conformational change, the recognition of a specific transcription factor into a fluorescent signal. In addition, stochastic optical resolution microscopy, a super-resolution microscopy technique, is used to track the internalization and intracellular trafficking of the DNA nanodevice with high spatial resolution. Overall, it has been shown that a rationally designed DNA nanodevice can be used to achieve rapid, simple, and cost-effective real-time determination of transcription factor binding activity and downstream gene silencing.
Collapse
Affiliation(s)
- Alessandro Bertucci
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical and Biomolecular Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia.
| | | | | | | | | | | | | |
Collapse
|
14
|
Zhang H, Liu X, Liu M, Gao T, Huang Y, Liu Y, Zeng W. Gene detection: An essential process to precision medicine. Biosens Bioelectron 2018; 99:625-636. [DOI: 10.1016/j.bios.2017.08.033] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Accepted: 08/12/2017] [Indexed: 01/08/2023]
|
15
|
Zhang K, Wang L, Zhao H, Jiang W. Target binding protection mediated rolling circle amplification for sensitive detection of transcription factors. Talanta 2017; 179:331-336. [PMID: 29310240 DOI: 10.1016/j.talanta.2017.11.028] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 10/27/2017] [Accepted: 11/16/2017] [Indexed: 12/12/2022]
Abstract
Transcription factors (TFs) play central roles in the regulation of gene expression by binding with specific DNA sequences. As a potential diagnostic marker, sensitive detection of TFs is essential for pharmacological research development and clinical disease diagnosis. Here, a new fluorescent method based on target binding protection mediated rolling circle amplification (RCA) was developed for TFs detection. A hairpin probe with recognition site for target binding, cleavage site for Nt.BbvCI digestion and two hanging DNA strands with part of G-quadruplex complementary sequences for signal output was designed. Moreover, the hairpin probe could serve as template of RCA after being ligated. Firstly, TFs bound with hairpin probes and protected signal complementary sequences against cleavage by Nt.BbvCI due to space hindrance effect, while the excess hairpin probes were effectively digested to avoid false positive signal. Then, TFs and Nt.BbvCI were dissociated from hairpin probes by heating, complete hairpin probes being preserved. Next, protected hairpin probes were specifically connected to dumbbell templates under the action of T4 DNA ligase. Subsequently, dumbbell templates hybridized with primer to initiate the RCA reaction, obtaining numerous G-quadruplex sequences. Finally, N-methyl-mesoporphyrin IX (NMM) bound with G-quadruplex to generate enhanced fluorescence signal. The proposed assay system achieved excellent specificity and sensitivity toward TATA-binding protein (TBP) with a detection limit as low as 88pM, and with a linear range from 100pM to 40nM. The strategy proposed here was looking forward to offer a powerful tool for TFs related bioanalysis and disease diagnostics.
Collapse
Affiliation(s)
- Kaili Zhang
- Key Laboratory for Colloid and Interface Chemistry of Education Ministry, School of Chemistry and Chemical Engineering, Shandong University, 250100 Jinan, PR China
| | - Lei Wang
- School of Pharmaceutical Sciences, Shandong University, 250012 Jinan, PR China
| | - Haiyan Zhao
- Key Laboratory for Colloid and Interface Chemistry of Education Ministry, School of Chemistry and Chemical Engineering, Shandong University, 250100 Jinan, PR China
| | - Wei Jiang
- Key Laboratory for Colloid and Interface Chemistry of Education Ministry, School of Chemistry and Chemical Engineering, Shandong University, 250100 Jinan, PR China.
| |
Collapse
|
16
|
Li B, Xu L, Chen Y, Zhu W, Shen X, Zhu C, Luo J, Li X, Hong J, Zhou X. Sensitive and Label-Free Fluorescent Detection of Transcription Factors Based on DNA-Ag Nanoclusters Molecular Beacons and Exonuclease III-Assisted Signal Amplification. Anal Chem 2017; 89:7316-7323. [DOI: 10.1021/acs.analchem.7b00055] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Bingzhi Li
- School
of Pharmacy, Nanjing Medical University, Nanjing 211166, People’s Republic of China
| | - Lei Xu
- School
of Pharmacy, Nanjing Medical University, Nanjing 211166, People’s Republic of China
| | - Yue Chen
- Department
of Nutrition and Food Safety, School of Public Health, Nanjing Medical University, Nanjing 211166, People’s Republic of China
| | - Wanying Zhu
- School
of Pharmacy, Nanjing Medical University, Nanjing 211166, People’s Republic of China
| | - Xin Shen
- School
of Pharmacy, Nanjing Medical University, Nanjing 211166, People’s Republic of China
| | - Chunhong Zhu
- School
of Pharmacy, Nanjing Medical University, Nanjing 211166, People’s Republic of China
| | - Jieping Luo
- School
of Pharmacy, Nanjing Medical University, Nanjing 211166, People’s Republic of China
| | - Xiaoxu Li
- School
of Pharmacy, Nanjing Medical University, Nanjing 211166, People’s Republic of China
| | - Junli Hong
- School
of Pharmacy, Nanjing Medical University, Nanjing 211166, People’s Republic of China
| | - Xuemin Zhou
- School
of Pharmacy, Nanjing Medical University, Nanjing 211166, People’s Republic of China
| |
Collapse
|
17
|
Li X, Xu X, Song J, Xue Q, Li C, Jiang W. Sensitive detection of T4 polynucleotide kinase activity based on multifunctional magnetic probes and polymerization nicking reactions mediated hyperbranched rolling circle amplification. Biosens Bioelectron 2017; 91:631-636. [DOI: 10.1016/j.bios.2017.01.022] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2016] [Revised: 12/22/2016] [Accepted: 01/11/2017] [Indexed: 11/26/2022]
|
18
|
Chang L, He X, Chen L, Zhang Y. A novel fluorescent turn-on biosensor based on QDs@GSH-GO fluorescence resonance energy transfer for sensitive glutathione S-transferase sensing and cellular imaging. NANOSCALE 2017; 9:3881-3888. [PMID: 28256653 DOI: 10.1039/c6nr09944k] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A novel fluorescent turn-on biosensor based on fluorescence resonance energy transfer (FRET) from GSH functionalized Mn-doped ZnS QDs to graphene oxide (GO) was constructed to determine glutathione S-transferases (GSTs) in live cells and human urine. The QDs@GSH is adsorbed on the GO surface via hydrogen bonding interaction between the GSH on the surface of QDs@GSH and GO, and as a result, fluorescence quenching of the QDs@GSH takes place because of FRET. The FRET efficiency from QDs@GSH to GO was calculated to be 86.3%. However, in the presence of GSTs, the FRET process could be inhibited by the specific interaction between the GSH on the surface of QDs@GSH and GSTs, which would keep the QDs@GSH far away from the GO surface, leading to the recovery of the fluorescence. The proposed sensor exhibited high sensitivity, selectivity, and excellent specificity in the buffer, live cells and human urine for the detection of GSTs. Under the physiological conditions (pH 7.4), dissociation constants and the detection limit of GST and ATP6 V1F (a GST-tagged protein) were estimated to be 8.0 × 10-9 M, 2.1 × 10-10 M and 3.5 × 10-9 M, 7.2 × 10-11 M, respectively. The presented method has been successfully utilized for the determination of the GSTs in live cells and human urine without any complicated pretreatment and the recovery was in the range of 80%-90%.
Collapse
Affiliation(s)
- Lifang Chang
- Research Center for Analytical Sciences, College of Chemistry, Tianjin Key Laboratory of Biosensing and Molecular Recognition, State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin 300071, China.
| | - Xiwen He
- Research Center for Analytical Sciences, College of Chemistry, Tianjin Key Laboratory of Biosensing and Molecular Recognition, State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin 300071, China.
| | - Langxing Chen
- Research Center for Analytical Sciences, College of Chemistry, Tianjin Key Laboratory of Biosensing and Molecular Recognition, State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin 300071, China. and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China
| | - Yukui Zhang
- Research Center for Analytical Sciences, College of Chemistry, Tianjin Key Laboratory of Biosensing and Molecular Recognition, State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin 300071, China. and Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| |
Collapse
|
19
|
Zhu D, Wang L, Xu X, Jiang W. Colocalization recognition-activated cascade signal amplification strategy for ultrasensitive detection of transcription factors. Biosens Bioelectron 2017; 89:978-983. [DOI: 10.1016/j.bios.2016.09.073] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Revised: 09/15/2016] [Accepted: 09/21/2016] [Indexed: 01/10/2023]
|
20
|
Zhang Z, Yang J, Pang W, Yan G. An aptamer-based fluorescence probe for facile detection of lipopolysaccharide in drinks. RSC Adv 2017. [DOI: 10.1039/c7ra10710b] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An alternative fluorescence strategy for specific and convenient detection of lipopolysaccharide in drink was developed.
Collapse
|
21
|
Zhou Z, Hao N, Zhang Y, Hua R, Qian J, Liu Q, Li H, Zhu W, Wang K. A novel universal colorimetric sensor for simultaneous dual target detection through DNA-directed self-assembly of graphene oxide and magnetic separation. Chem Commun (Camb) 2017. [DOI: 10.1039/c7cc03914j] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
A novel universal colorimetric sensor for simultaneous dual target detection through DNA-directed self-assembly of graphene oxide and magnetic separation was designed for the first time.
Collapse
Affiliation(s)
- Zhou Zhou
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang 212013
- P. R. China
| | - Nan Hao
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang 212013
- P. R. China
| | - Ying Zhang
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang 212013
- P. R. China
| | - Rong Hua
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang 212013
- P. R. China
| | - Jing Qian
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang 212013
- P. R. China
| | - Qian Liu
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang 212013
- P. R. China
| | - Henan Li
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang 212013
- P. R. China
| | - Weihua Zhu
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang 212013
- P. R. China
| | - Kun Wang
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang 212013
- P. R. China
| |
Collapse
|
22
|
Lu L, Wang M, Mao Z, Kang TS, Chen XP, Lu JJ, Leung CH, Ma DL. A novel dinuclear iridium(III) complex as a G-quadruplex-selective probe for the luminescent switch-on detection of transcription factor HIF-1α. Sci Rep 2016; 6:22458. [PMID: 26932240 PMCID: PMC4773817 DOI: 10.1038/srep22458] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Accepted: 02/15/2016] [Indexed: 12/18/2022] Open
Abstract
A novel dinuclear Ir(III) complex 5 was discovered to be specific to G-quadruplex DNA, and was utilized in a label-free G-quadruplex-based detection platform for transcription factor activity. The principle of this assay was demonstrated by using HIF-1α as a model protein. Moreover, this HIF-1α detection assay exhibited potential use for biological sample analysis.
Collapse
Affiliation(s)
- Lihua Lu
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - Modi Wang
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - Zhifeng Mao
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - Tian-Shu Kang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Xiu-Ping Chen
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Jin-Jian Lu
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Chung-Hang Leung
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Dik-Lung Ma
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| |
Collapse
|
23
|
Zhang Y, Ma F, Tang B, Zhang CY. Recent advances in transcription factor assays in vitro. Chem Commun (Camb) 2016; 52:4739-48. [DOI: 10.1039/c5cc09891b] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
We review the recent advances in transcription factor assaysin vitroand highlight the emerging trends as well.
Collapse
Affiliation(s)
- Yan Zhang
- College of Chemistry
- Chemical Engineering and Materials Science
- Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong
- Key Laboratory of Molecular and Nano Probes
- Ministry of Education
| | - Fei Ma
- College of Chemistry
- Chemical Engineering and Materials Science
- Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong
- Key Laboratory of Molecular and Nano Probes
- Ministry of Education
| | - Bo Tang
- College of Chemistry
- Chemical Engineering and Materials Science
- Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong
- Key Laboratory of Molecular and Nano Probes
- Ministry of Education
| | - Chun-yang Zhang
- College of Chemistry
- Chemical Engineering and Materials Science
- Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong
- Key Laboratory of Molecular and Nano Probes
- Ministry of Education
| |
Collapse
|
24
|
Fok I cleavage–inhibition strategy for the specific and accurate detection of transcription factors. Talanta 2015; 144:44-50. [DOI: 10.1016/j.talanta.2015.05.032] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2015] [Revised: 05/10/2015] [Accepted: 05/12/2015] [Indexed: 01/23/2023]
|
25
|
Wang S, Zhang Y, Ning Y, Zhang GJ. A WS2 nanosheet-based platform for fluorescent DNA detection via PNA-DNA hybridization. Analyst 2015; 140:434-9. [PMID: 25426801 DOI: 10.1039/c4an01738b] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The WS2 nanosheet, a two-dimensional layered nanomaterial, shows high fluorescence quenching ability for the dye-labeled ssDNA. Currently, most of the fluorescent DNA detection methods employ DNA as a probe for recognition of target DNA. Peptide nucleic acid (PNA) is a DNA mimic but a neutral molecule, showing superior hybridization properties to target DNA. Based on the unique properties of WS2 nanosheet and PNA-DNA hybridization, we have developed a rapid, simple, stable and sensitive approach for DNA detection based on good fluorescence quenching ability of the WS2 nanosheet as well as high binding affinity and specificity of PNA to DNA. This novel assay is capable of exhibiting high sensitivity and specificity with a detection limit of 500 pM, and discriminating between single bases.
Collapse
Affiliation(s)
- Shuting Wang
- School of Laboratory Medicine, Hubei University of Chinese Medicine, 1 Huangjia Lake West Road, Wuhan 430065, China.
| | | | | | | |
Collapse
|
26
|
Zhu D, Wang L, Xu X, Jiang W. Label-free and enzyme-free detection of transcription factors with graphene oxide fluorescence switch-based multifunctional G-quadruplex-hairpin probe. Biosens Bioelectron 2015; 75:155-60. [PMID: 26318784 DOI: 10.1016/j.bios.2015.08.034] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Revised: 07/13/2015] [Accepted: 08/17/2015] [Indexed: 11/30/2022]
Abstract
Transcription factors (TFs) play pivotal roles in the regulation of a variety of essential cellular processes and some of them have been recognized as potential diagnostic markers and therapeutic targets of some diseases. Sensitive and accurate detection of TFs is of great importance to better understanding their roles in gene regulation and evaluation of disease state. Here, we developed a simple, label-free and enzyme-free new fluorescent strategy for the detection of TFs by graphene oxide (GO) fluorescence switch-based multifunctional G-quadruplex-hairpin probe (MGHP). The MGHP possessed of three functions simultaneously, adsorbing onto GO with the loop part, binding to target with the stem part and serving as signal carrier with the terminal G-quadruplex. First, the MGHP was adsorbed quickly to GO. Next, the TF bound to the stem part of MGHP to form a huge target-MGHP complex, which led to desorption of the complex from GO. Finally, NMM was inserted into G-quadruplex in the complex to yield an enhanced fluorescence response. The GO used here, as a fluorescence switch, could quickly and efficiently quench the fluorescence of NMM inserted into the MGHP absorbed on the GO, guaranteeing a high signal-to-noise ratio. Sensitive detection of purified NF-κB p50 and HeLa cell nuclear extracts were achieved with detection limits of 0.2nM and 7.8ng/µL, respectively. Moreover, this proposed strategy could be used to screen inhibitors of NF-κB p50 activity. The strategy proposed here might offer a new potential approach for reliable quantification of TFs in clinical diagnostics and treatment research of some diseases.
Collapse
Affiliation(s)
- Desong Zhu
- Key Laboratory for Colloid and Interface Chemistry of Education Ministry, School of Chemistry and Chemical Engineering, Shandong University, 250100 Jinan, PR China
| | - Lei Wang
- School of Pharmaceutical Sciences, Shandong University, 250012 Jinan, PR China
| | - Xiaowen Xu
- Key Laboratory for Colloid and Interface Chemistry of Education Ministry, School of Chemistry and Chemical Engineering, Shandong University, 250100 Jinan, PR China
| | - Wei Jiang
- Key Laboratory for Colloid and Interface Chemistry of Education Ministry, School of Chemistry and Chemical Engineering, Shandong University, 250100 Jinan, PR China.
| |
Collapse
|
27
|
Li C, Qiu X, Hou Z, Deng K. A dumbell probe-mediated rolling circle amplification strategy for highly sensitive transcription factor detection. Biosens Bioelectron 2015; 64:505-10. [DOI: 10.1016/j.bios.2014.09.068] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2014] [Revised: 09/21/2014] [Accepted: 09/23/2014] [Indexed: 10/24/2022]
|
28
|
Graphene oxide–DNA based sensors. Biosens Bioelectron 2014; 60:22-9. [DOI: 10.1016/j.bios.2014.03.039] [Citation(s) in RCA: 148] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2014] [Revised: 03/07/2014] [Accepted: 03/20/2014] [Indexed: 11/17/2022]
|
29
|
Deng X, Tang H, Jiang J. Recent progress in graphene-material-based optical sensors. Anal Bioanal Chem 2014; 406:6903-16. [DOI: 10.1007/s00216-014-7895-4] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Revised: 05/07/2014] [Accepted: 05/13/2014] [Indexed: 12/11/2022]
|
30
|
Koninti RK, Sengupta A, Gavvala K, Ballav N, Hazra P. Loading of an anti-cancer drug onto graphene oxide and subsequent release to DNA/RNA: a direct optical detection. NANOSCALE 2014; 6:2937-44. [PMID: 24477816 DOI: 10.1039/c3nr06081k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Graphene oxide based molecular switching of ellipticine (E) has been utilized to probe its efficient loading onto graphene oxide (GO) and subsequent release to intra-cellular biomolecules like DNA/RNA. The green fluorescence of E switches to blue in GO and switches back to green with polynucleotides. The intensified blue emission of the ellipticine-GO (E-GO) complex with human serum albumin (HSA), switches to a bluish green upon addition of dsDNA. Electron microscopy reveals the formation of distinctive 3D assemblies involving GO and biomolecule(s) probably through non-covalent interactions and this is primarily responsible for the biomolcule(s) assisted fluorescence-switching of E. To our knowledge, such morphological patterning of a GO-DNA complex is very unusual, reported here the first time and could find applications in the fabrication of biomedical devices. Moreover, our approach of direct optical detection of drug loading and releasing is very cheap, appealing and will be useful for clinical trial experiments once the cytotoxicity of GO is duly taken care.
Collapse
Affiliation(s)
- Raj Kumar Koninti
- Department of Chemistry, Mendeleev Block, Indian Institution of Science Education and Research (IISER), Dr Homi Bhabha road, Pashan, Pune, Maharashtra - 411008, India.
| | | | | | | | | |
Collapse
|
31
|
Graphene materials-based energy acceptor systems and sensors. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2014. [DOI: 10.1016/j.jphotochemrev.2013.10.002] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
|
32
|
Chen JH, Zhang X, Cai S, Wu D, Lin J, Li C, Zhang J. Label-free electrochemical biosensor using home-made 10-methyl-3-nitro-acridone as indicator for picomolar detection of nuclear factor kappa B. Biosens Bioelectron 2014; 53:12-7. [DOI: 10.1016/j.bios.2013.09.038] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2013] [Revised: 09/05/2013] [Accepted: 09/17/2013] [Indexed: 10/26/2022]
|
33
|
Zhu D, Zhu J, Zhu Y, Wang L, Jiang W. Sensitive detection of transcription factors using an Ag+-stabilized self-assembly triplex DNA molecular switch. Chem Commun (Camb) 2014; 50:14987-90. [DOI: 10.1039/c4cc06205a] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A simple, enzyme-free and sensitive new fluorescent strategy for detection of transcription factors was proposed based on a bifunctional Ag+-stabilized self-assembly triplex DNA molecular switch.
Collapse
Affiliation(s)
- Desong Zhu
- Key Laboratory for Colloid and Interface Chemistry of Education Ministry
- Department of Chemistry
- Shandong University
- Jinan, China
| | - Jing Zhu
- Key Laboratory for Colloid and Interface Chemistry of Education Ministry
- Department of Chemistry
- Shandong University
- Jinan, China
| | - Ye Zhu
- Key Laboratory for Colloid and Interface Chemistry of Education Ministry
- Department of Chemistry
- Shandong University
- Jinan, China
| | - Lei Wang
- School of Pharmacy
- Shandong University
- Jinan 250012, P. R. China
| | - Wei Jiang
- Key Laboratory for Colloid and Interface Chemistry of Education Ministry
- Department of Chemistry
- Shandong University
- Jinan, China
| |
Collapse
|
34
|
Zheng AX, Cong ZX, Wang JR, Li J, Yang HH, Chen GN. Highly-efficient peroxidase-like catalytic activity of graphene dots for biosensing. Biosens Bioelectron 2013; 49:519-24. [DOI: 10.1016/j.bios.2013.05.038] [Citation(s) in RCA: 135] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2013] [Revised: 05/13/2013] [Accepted: 05/24/2013] [Indexed: 01/03/2023]
|
35
|
Abstract
Carboxyl-modified graphene materials in both oxide and reduced state were explored in parallel for the preparation of field-effect transistors (FET). They were solution gated by phosphate buffer solution (PBS) (pH 7.2). Their conductance were examined and compared with unmodified graphene transistors, firstly. Then, after single strand DNA molecules were immobilized on reduced and oxide graphene transistors, their conductance and compared. Here ssDNA molecules were amino-tagged at the terminal five. It was found that ambipolar characteristic was exhibited by reduced graphene transistors, even they were undergone carboxyl modification. And it was also discovered that there were opposite conductance variation with the increasing of ssDNA concentrations and bigger changes were obtained by reduced carboxyl-modified graphene transistors.
Collapse
|
36
|
Liu JJ, Zhang XL, Cong ZX, Chen ZT, Yang HH, Chen GN. Glutathione-functionalized graphene quantum dots as selective fluorescent probes for phosphate-containing metabolites. NANOSCALE 2013; 5:1810-5. [PMID: 23370282 DOI: 10.1039/c3nr33794d] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Bright blue fluorescent glutathione-functionalized graphene quantum dots (GQDs@GSH) were prepared by a one-step pyrolysis method with a fluorescence quantum yield as high as 33.6%. Futhermore, the obtained GQDs@GSH can be used as a probe to estimate the ATP level in cell lysates and human blood serum.
Collapse
Affiliation(s)
- Jing-Jing Liu
- The Key Lab of Analysis and Detection Technology for Food Safety of the MOE, College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350108, PR China
| | | | | | | | | | | |
Collapse
|
37
|
Liu X, Liu J, Zhan D, Yan J, Wang J, Chao D, Lai L, Chen M, Yin J, Shen Z. Repeated microwave-assisted exfoliation of expandable graphite for the preparation of large scale and high quality multi-layer graphene. RSC Adv 2013. [DOI: 10.1039/c3ra22673e] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
38
|
Li X, Wang G, Ding X, Chen Y, Gou Y, Lu Y. A “turn-on” fluorescent sensor for detection of Pb2+ based on graphene oxide and G-quadruplex DNA. Phys Chem Chem Phys 2013; 15:12800-4. [DOI: 10.1039/c3cp00047h] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
|
39
|
Wu CS, Peng L, You M, Han D, Chen T, Williams KR, Yang CJ, Tan W. Engineering molecular beacons for intracellular imaging. INTERNATIONAL JOURNAL OF MOLECULAR IMAGING 2012; 2012:501579. [PMID: 23209893 PMCID: PMC3502855 DOI: 10.1155/2012/501579] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2012] [Accepted: 09/21/2012] [Indexed: 12/25/2022]
Abstract
Molecular beacons (MBs) represent a class of nucleic acid probes with unique DNA hairpin structures that specifically target complementary DNA or RNA. The inherent "OFF" to "ON" signal transduction mechanism of MBs makes them promising molecular probes for real-time imaging of DNA/RNA in living cells. However, conventional MBs have been challenged with such issues as false-positive signals and poor biostability in complex cellular matrices. This paper describes the novel engineering steps used to improve the fluorescence signal and reduce to background fluorescence, as well as the incorporation of unnatural nucleotide bases to increase the resistance of MBs to nuclease degradation for application in such fields as chemical analysis, biotechnology, and clinical medicine. The applications of these de novo MBs for single-cell imaging will be also discussed.
Collapse
Affiliation(s)
- Cuichen Sam Wu
- Center for Research at Bio/Nano Interface and Department of Chemistry and Department of Physiology and Functional Genomics, Shands Cancer Center, UF Genetics Institute and McKnight Brain Institute, University of Florida, Gainesville, FL 32611-7200, USA
| | - Lu Peng
- Center for Research at Bio/Nano Interface and Department of Chemistry and Department of Physiology and Functional Genomics, Shands Cancer Center, UF Genetics Institute and McKnight Brain Institute, University of Florida, Gainesville, FL 32611-7200, USA
| | - Mingxu You
- Center for Research at Bio/Nano Interface and Department of Chemistry and Department of Physiology and Functional Genomics, Shands Cancer Center, UF Genetics Institute and McKnight Brain Institute, University of Florida, Gainesville, FL 32611-7200, USA
| | - Da Han
- Center for Research at Bio/Nano Interface and Department of Chemistry and Department of Physiology and Functional Genomics, Shands Cancer Center, UF Genetics Institute and McKnight Brain Institute, University of Florida, Gainesville, FL 32611-7200, USA
| | - Tao Chen
- Center for Research at Bio/Nano Interface and Department of Chemistry and Department of Physiology and Functional Genomics, Shands Cancer Center, UF Genetics Institute and McKnight Brain Institute, University of Florida, Gainesville, FL 32611-7200, USA
| | - Kathryn R. Williams
- Center for Research at Bio/Nano Interface and Department of Chemistry and Department of Physiology and Functional Genomics, Shands Cancer Center, UF Genetics Institute and McKnight Brain Institute, University of Florida, Gainesville, FL 32611-7200, USA
| | - Chaoyong James Yang
- State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemical Biology, Key Laboratory of Analytical Science, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Weihong Tan
- Center for Research at Bio/Nano Interface and Department of Chemistry and Department of Physiology and Functional Genomics, Shands Cancer Center, UF Genetics Institute and McKnight Brain Institute, University of Florida, Gainesville, FL 32611-7200, USA
| |
Collapse
|