1
|
Concentration-Dependent Study of Nucleic Acid Blockers Used for Sequence-Specificity Enhancement in Nucleic Acids Detection. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2022. [DOI: 10.1007/s13369-022-06972-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
2
|
Non-enzymatic detection of miR-21 in cancer cells using a homogeneous mix-and-read smart probe assay. Anal Biochem 2022; 645:114601. [PMID: 35182494 DOI: 10.1016/j.ab.2022.114601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 02/03/2022] [Accepted: 02/10/2022] [Indexed: 11/23/2022]
Abstract
We report a new assay system for the detection of miR-21 in cancer cells. The new assay works at room temperature and it does not involve enzymatic amplification. It consists a hairpin smart probe, designed to specifically recognize miR-21 target sequence. We tested the performance and sequence recognition capability of the smart probe to confirm desired specifications. We used the smart probe for the sequence-specific recognition of synthetic miR-21 oligonucleotides as well as mismatch sequences and we found that the probe recognizes the target sequence-specifically, while discriminating against mismatched sequences. We determined the limit of detection and limit of quantitation for the miR-21 oligonucleotides to be 1.72 nM and 5.78 nM, respectively, while the sensitivity is 6.90 × 1011 c.p.sM-1. More importantly, we showed that the smart probe-based method is also sensitive and selective for miR-21 when applied to crude extractions from MCF-7 cancer cell line at room temperature, with the results showing high fluorescence signals for the MCF-7 samples while showing much less signals for samples that did not contain miR-21. Thus, this new smart probe system constitutes a homogeneous, mix-and-read detection technique that can provide reliable diagnostics of miR-21 cancer biomarker at room temperature.
Collapse
|
3
|
EKİNCİOĞLU Y, KILIÇ HŞ, DERELİ Ö. A DFT/TD-DFT study on the Molecular Structure Absorption and Fluorescence Spectra of Gas/Solution Phases Adenosine 5’–triphosphate Molecule. GAZI UNIVERSITY JOURNAL OF SCIENCE 2021. [DOI: 10.35378/gujs.834249] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
4
|
Oladepo SA, Yusuf BO. Detection of Several Homologous MicroRNAs by a Single Smart Probe System Consisting of Linear Nucleic Acid Blockers. MOLECULES (BASEL, SWITZERLAND) 2019; 24:molecules24203691. [PMID: 31615053 PMCID: PMC6832958 DOI: 10.3390/molecules24203691] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 10/01/2019] [Accepted: 10/05/2019] [Indexed: 11/13/2022]
Abstract
We report a universal smart probe (SP) that is capable of detecting several homologous let-7 microRNAs (miRNAs). While the SP is complementary to let-7a, and therefore, strongly binds to this target, due to sequence homology, the SP also has equal propensity to non-specifically hybridize with let-7b and let-7c, which are homologous to let-7a. The fluorescence signal of the SP was switched off in the absence of any homologous member target, but the signal was switched on when any of the three homologous members was present. With the assistance of nucleic acid blockers (NABs), this SP system can discriminate between homologous miRNAs. We show that the SP can discriminate between let-7a and the other two sequences by using linear NABs (LNABs) to block non-specific interactions between the SP and these sequences. We also found that LNABs used do not cross-react with the let-7a target due to the low LNABs:SP molar ratio of 6:1 used. Overall, this SP represents a universal probe for the recognition of a homologous miRNA family. The assay is sensitive, providing a detection limit of 6 fmol. The approach is simple, fast, usable at room temperature, and represents a general platform for the in vitro detection of homologous microRNAs by a single fluorescent hairpin probe.
Collapse
Affiliation(s)
- Sulayman A Oladepo
- Department of Chemistry, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia.
| | - Basiru O Yusuf
- Department of Chemistry, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia.
| |
Collapse
|
5
|
Fisher O, Benson RA, Imray CH. The clinical application of purine nucleosides as biomarkers of tissue Ischemia and hypoxia in humans in vivo. Biomark Med 2019; 13:953-965. [PMID: 31321992 DOI: 10.2217/bmm-2019-0049] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
During periods of ischemia and hypoxia, intracellular adenosine triphosphate stores are rapidly depleted. Its metabolism results in release of purine nucleosides into the systemic circulation. While the potential of purine nucleosides as a biomarker of ischemia has long been recognized, this has been limited by their complex physiological role and inherent instability leading to problematic sampling and prolonged, complex analysis procedures. Purine release has been demonstrated from cerebral tissue in patients undergoing carotid endarterectomy and patients presenting to hospital with stroke and transient ischemic attack. Rises in purine nucleosides have also been demonstrated in patients with angina and myocardial infarction, during systemic hypoxia, exercise, in patients with peripheral arterial disease and during surgery. This article reviews purine nucleoside production in ischemia, the development of purine analysis technology and details results of the studies investigating purine nucleosides as a biomarker of ischemia with suggestions for areas of future research.
Collapse
Affiliation(s)
- Owain Fisher
- Department of Vascular Surgery, University Hospital Coventry & Warwickshire, Coventry, CV2 2DX, UK.,Warwick Medical School, University of Warwick, CV4 7AL, UK
| | - Ruth A Benson
- Department of Vascular Surgery, University Hospital Coventry & Warwickshire, Coventry, CV2 2DX, UK.,Institute of Cancer & Genomic Sciences, University of Birmingham, B15 2SY, UK
| | - Christopher He Imray
- Department of Vascular Surgery, University Hospital Coventry & Warwickshire, Coventry, CV2 2DX, UK.,Warwick Medical School, University of Warwick, CV4 7AL, UK
| |
Collapse
|
6
|
Wang HB, Bai HY, Dong GL, Liu YM. DNA-templated Au nanoclusters coupled with proximity-dependent hybridization and guanine-rich DNA induced quenching: a sensitive fluorescent biosensing platform for DNA detection. NANOSCALE ADVANCES 2019; 1:1482-1488. [PMID: 36132614 PMCID: PMC9419426 DOI: 10.1039/c8na00278a] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Accepted: 01/28/2019] [Indexed: 06/09/2023]
Abstract
In this paper, the fluorescence signal of poly(A) DNA-templated Au nanoclusters (AuNCs) is found to be greatly quenched by photoinduced electron transfer (PET) when they are close to guanine (G)-rich DNA. Based on the findings, we have designed a low-cost fluorescence biosensing strategy for the sensitive detection of DNA. Highly luminescent and photo-stable poly(A) DNA-AuNCs were utilized as the fluorescent indicator and G-rich DNA was utilized as the fluorescent quencher. In the absence of target DNA, DNA-AuNCs failed to hybridize with the G-rich DNA and did not form the duplex DNA structure. Strong fluorescence intensity at 475 nm was observed due to the DNA-AuNCs being far away from the G-rich DNA. However, in the presence of target DNA, the DNA-AuNCs together with G-rich DNA could hybridize with the target DNA, leading to the 5' terminus of the DNA-AuNCs and the 3' terminus of G-rich DNA being in close proximity and promoting the cooperative hybridization. Therefore, a "Y" junction structure was formed and the G-rich sequences were brought close to the AuNCs. Therefore, the fluorescence intensity of the sensing system decreased significantly. Taking advantage of the poly(A) DNA-templated Au nanoclusters and G-rich DNA proximity-induced quenching, the strategy could be extended to determine other biomolecules by designing appropriate sequences of DNA probes.
Collapse
Affiliation(s)
- Hai-Bo Wang
- College of Chemistry and Chemical Engineering, Institute for Conservation and Utilization of Agro-bioresources in Dabie Mountains, Xinyang Normal University Xinyang 464000 PR China +86 376 6391172 +86 376 6391172
| | - Hong-Yu Bai
- College of Chemistry and Chemical Engineering, Institute for Conservation and Utilization of Agro-bioresources in Dabie Mountains, Xinyang Normal University Xinyang 464000 PR China +86 376 6391172 +86 376 6391172
| | - Gao-Li Dong
- College of Chemistry and Chemical Engineering, Institute for Conservation and Utilization of Agro-bioresources in Dabie Mountains, Xinyang Normal University Xinyang 464000 PR China +86 376 6391172 +86 376 6391172
| | - Yan-Ming Liu
- College of Chemistry and Chemical Engineering, Institute for Conservation and Utilization of Agro-bioresources in Dabie Mountains, Xinyang Normal University Xinyang 464000 PR China +86 376 6391172 +86 376 6391172
| |
Collapse
|
7
|
Saberi Z, Rezaei B, Khayamian T. A fluorescent aptasensor for analysis of adenosine triphosphate based on aptamer-magnetic nanoparticles and its single-stranded complementary DNA labeled carbon dots. LUMINESCENCE 2018; 33:640-646. [PMID: 29380946 DOI: 10.1002/bio.3457] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2017] [Revised: 10/16/2017] [Accepted: 12/24/2017] [Indexed: 12/28/2022]
Abstract
A new fluorimetric aptasensor was designed for the determination of adenosine triphosphate (ATP) based on magnetic nanoparticles (MNPs) and carbon dots (CDs). In this analytical strategy, an ATP aptamer was conjugated on MNPs and a complementary strand of the aptamer (CS) was labeled with CDs. The aptamer and its CS were hybridized to form a double helical structure. The hybridized aptamers could be used for the specific recognition of ATP in a biological complex matrix using a strong magnetic field to remove the interfering effect. In the absence of ATP, no CDs-CS could be released into the solution and this resulted in a weak fluorescence signal. In the presence of ATP, the target binds to its aptamer and causes the dissociation of the double helical structure and liberation of the CS, such that a strong fluorescence signal was generated. The increased fluorescence signal was proportional to ATP concentration. The limit of detection was estimated to be 1.0 pmol L-1 with a dynamic range of 3.0 pmol L-1 to 5.0 nmol L-1 . The specific aptasensor was applied to detect ATP in human serum samples with satisfactory results. Moreover, molecular dynamic simulation (MDS) studies were used to analyze interactions of the ATP molecule with the aptamer.
Collapse
Affiliation(s)
- Zeinab Saberi
- Department of Chemistry, Isfahan University of Technology, Isfahan, Islamic Republic of Iran
| | - Behzad Rezaei
- Department of Chemistry, Isfahan University of Technology, Isfahan, Islamic Republic of Iran
| | - Taghi Khayamian
- Department of Chemistry, Isfahan University of Technology, Isfahan, Islamic Republic of Iran
| |
Collapse
|
8
|
Oladepo SA. Design and Characterization of a Singly Labeled Fluorescent Smart Probe for In Vitro Detection of miR-21. APPLIED SPECTROSCOPY 2018; 72:79-88. [PMID: 28946749 DOI: 10.1177/0003702817736527] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A sensitive hairpin smart probe (SP) has been developed and tested for its sequence-specificity and sensitivity for detecting microRNAs (miRNAs). The loop sequence of this SP is perfectly complementary to microRNA-21 (miR-21) sequence. This miRNA regulates certain biological processes and has been implicated in certain forms of cancer. The stem of the new SP consists of a fluorophore on one end and multiple guanine bases on the opposing end are used as quenchers. The fluorescence of the SP is significantly quenched by the guanine bases at room temperature and in the absence of the miR-21 target. The presence of miR-21 switches on the fluorescence due to spontaneous hybridization of the SP with this target, which also forces the stem hybrid of the SP apart. This new SP successfully discriminated between the perfect miR-21 target and two closely similar single-base mismatch sequences. When the SP was incubated with the miR-21 at 37 ℃, the hybridization kinetics increased seven times, compared to room temperature hybridization. Overall, this new SP shows good detection sensitivity and gives a limit of detection and limit of quantitation of 14.0 nM and 46.7 nM, respectively. This detection platform represents a simple, fast, mix-and-read homogeneous assay for sequence-specific detection of miR-21, and it can be adapted for other related diagnostic applications.
Collapse
Affiliation(s)
- Sulayman A Oladepo
- 108765 Department of Chemistry, King Fahd University of Petroleum and Minerals, Dhahran 31261, Kingdom of Saudi Arabia
| |
Collapse
|
9
|
Sunnapu O, Kotla NG, Maddiboyina B, Marepally S, Shanmugapriya J, Sekar K, Singaravadivel S, Sivaraman G. Rhodamine-Based Fluorescent Turn-On Probe for Facile Sensing and Imaging of ATP in Mitochondria. ChemistrySelect 2017. [DOI: 10.1002/slct.201701149] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Omprakash Sunnapu
- Department of Chemistry; SSM Institute of Engineering and Technology; Dindigul-624002 India
- Department of Chemistry; University of College of Engineering; Anna university; Dindugul-624003 India
| | - Niranjan G. Kotla
- Institute for Stem Cell Biology and Regenerative Medicine; National Centre for Biological Sciences, GKVK campus; Bengaluru-560062 India
- Centre for Research in Medical Devices (CÚRAM); National University of Ireland Galway (NUI Galway); Galway Ireland
| | - Balaji Maddiboyina
- Siddharth Institute of Pharmaceutical Sciences, Narasaraopet; Guntur, Andhra Pradesh India
| | - Srujan Marepally
- Centre for Stem Cell Research; Christian Medical College Campus; Vellore-632002 India
| | | | - Karuppannan Sekar
- Department of Chemistry; University of College of Engineering; Anna university; Dindugul-624003 India
| | | | - Gandhi Sivaraman
- Institute for Stem Cell Biology and Regenerative Medicine; National Centre for Biological Sciences, GKVK campus; Bengaluru-560062 India
| |
Collapse
|
10
|
Zhou SS, Zhang L, Cai QY, Dong ZZ, Geng X, Ge J, Li ZH. A facile label-free aptasensor for detecting ATP based on fluorescence enhancement of poly(thymine)-templated copper nanoparticles. Anal Bioanal Chem 2016; 408:6711-7. [PMID: 27457102 DOI: 10.1007/s00216-016-9788-1] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 06/25/2016] [Accepted: 07/11/2016] [Indexed: 10/21/2022]
Abstract
A label-free fluorescence assay has been developed for sensitive and selective detection of adenosine triphosphate (ATP) by using poly(thymine) (poly T)-templated copper nanoparticles (CuNPs) as fluorescent indicator. In our design, ATP aptamer was split into two fragments, both of which were elongated with poly T strands that can be utilized as efficient template for the formation of copper nanoparticles through the reduction of copper ions by sodium ascorbate. In the presence of ATP, the two split aptamers could be dragged to form aptamer-ATP aptamer complex, which drew the poly T strands close to each other and induced a remarkable fluorescence enhancement of poly T-templated CuNPs. Thus, an elevated fluorescence enhancement of poly T-templated CuNPs was obtained with the increase in ATP concentration. Under optimized conditions, a good linear range for ATP detection was realized from 100 nM to 100 μM with a detection limit of 10.29 nM. In addition, the application of this biosensing system in complex biological matrix was demonstrated with satisfactory results. This assay provided a simple, label-free, cost-effective, and sensitive platform for the detection of ATP.
Collapse
Affiliation(s)
- Sai-Sai Zhou
- College of Chemistry and Molecular Engineering, Zhengzhou University, No. 100 Science Road, Zhengzhou, Henan, 450001, China
| | - Lin Zhang
- College of Chemistry and Molecular Engineering, Zhengzhou University, No. 100 Science Road, Zhengzhou, Henan, 450001, China
| | - Qi-Yong Cai
- College of Chemistry and Molecular Engineering, Zhengzhou University, No. 100 Science Road, Zhengzhou, Henan, 450001, China
| | - Zhen-Zhen Dong
- College of Chemistry and Molecular Engineering, Zhengzhou University, No. 100 Science Road, Zhengzhou, Henan, 450001, China
| | - Xin Geng
- College of Chemistry and Molecular Engineering, Zhengzhou University, No. 100 Science Road, Zhengzhou, Henan, 450001, China
| | - Jia Ge
- College of Chemistry and Molecular Engineering, Zhengzhou University, No. 100 Science Road, Zhengzhou, Henan, 450001, China.
| | - Zhao-Hui Li
- College of Chemistry and Molecular Engineering, Zhengzhou University, No. 100 Science Road, Zhengzhou, Henan, 450001, China.
| |
Collapse
|
11
|
Zhao T, Lin C, Yao Q, Chen X. A label-free electrochemiluminescent sensor for ATP detection based on ATP-dependent ligation. Talanta 2016; 154:492-7. [PMID: 27154705 DOI: 10.1016/j.talanta.2016.03.091] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 03/21/2016] [Accepted: 03/28/2016] [Indexed: 11/26/2022]
Abstract
In this work, we describe a new label-free, sensitive and highly selective strategy for the electrochemiluminescent (ECL) detection of ATP at the picomolar level via ATP-induced ligation. The molecular-beacon like DNA probes (P12 complex) are self-assembled on a gold electrode. The presence of ATP leads to the ligation of P12 complex which blocks the digestion by Exonuclease III (Exo III). The protected P12 complex causes the intercalation of numerous ECL indicators (Ru(phen)3(2+)) into the duplex DNA grooves, resulting in significantly amplified ECL signal output. Since the ligating site of T4 DNA ligase and the nicking site of Exo III are the same, it involves no long time of incubation for conformation change. The proposed strategy combines the amplification power of enzyme and the inherent high sensitivity of the ECL technique and enables picomolar detection of ATP. The developed strategy also shows high selectivity against ATP analogs, which makes our new label-free and highly sensitive ligation-based method a useful addition to the amplified ATP detection arena.
Collapse
Affiliation(s)
| | - Chunshui Lin
- State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361005, China
| | - Qiuhong Yao
- Xiamen Huaxia University, Xiamen 361024, China
| | - Xi Chen
- State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361005, China.
| |
Collapse
|
12
|
|
13
|
Lin C, Chen Y, Cai Z, Zhu Z, Jiang Y, Yang CJ, Chen X. A label-free fluorescence strategy for sensitive detection of ATP based on the ligation-triggered super-sandwich. Biosens Bioelectron 2014; 63:562-565. [PMID: 25168764 DOI: 10.1016/j.bios.2014.08.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Revised: 07/24/2014] [Accepted: 08/06/2014] [Indexed: 01/01/2023]
Abstract
In this study, a label-free fluorescence strategy for sensitive detection of ATP based on the ligation-triggered super-sandwich is reported. We designed a double-stranded DNA (ds-DNA) probe as the substrate of ATP-dependent ligation. SYBR Green I (SG I), a double-duplex DNA specific dye, was employed as the readout signal. In the absence of ATP, the ligation would not occur and the ds-DNA remained intact. Further, a weak fluorescence could be observed due to the intercalation of SG I into the grooves of the ds-DNA probe. In the presence of ATP, T4 DNA ligase would catalyse the ligation between 3'-OH and 5'-PO4 ends between ds-DNA probes. As a result, more binding sites of the SG I were generated and a fluorescence enhancement was obtained. This method showed a good sensitivity with a detection limit of 200 pM and could perfectly discriminate ATP from its analogs.
Collapse
Affiliation(s)
- Chunshui Lin
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Yiying Chen
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Zhixiong Cai
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Zhi Zhu
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Yaqi Jiang
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Chaoyong James Yang
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China; State Key Laboratory of Physical Chemistry of Solid Surfaces, The Key Laboratory for Chemical Biology of Fujian Province, Xiamen University, Xiamen 361005, China
| | - Xi Chen
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China; State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361005, China.
| |
Collapse
|
14
|
Kruss S, Hilmer AJ, Zhang J, Reuel NF, Mu B, Strano MS. Carbon nanotubes as optical biomedical sensors. Adv Drug Deliv Rev 2013; 65:1933-50. [PMID: 23906934 DOI: 10.1016/j.addr.2013.07.015] [Citation(s) in RCA: 204] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Revised: 07/16/2013] [Accepted: 07/18/2013] [Indexed: 01/11/2023]
Abstract
Biosensors are important tools in biomedical research. Moreover, they are becoming an essential part of modern healthcare. In the future, biosensor development will become even more crucial due to the demand for personalized-medicine, point-of care devices and cheaper diagnostic tools. Substantial advances in sensor technology are often fueled by the advent of new materials. Therefore, nanomaterials have motivated a large body of research and such materials have been implemented into biosensor devices. Among these new materials carbon nanotubes (CNTs) are especially promising building blocks for biosensors due to their unique electronic and optical properties. Carbon nanotubes are rolled-up cylinders of carbon monolayers (graphene). They can be chemically modified in such a way that biologically relevant molecules can be detected with high sensitivity and selectivity. In this review article we will discuss how carbon nanotubes can be used to create biosensors. We review the latest advancements of optical carbon nanotube based biosensors with a special focus on near-infrared (NIR)-fluorescence, Raman-scattering and fluorescence quenching.
Collapse
Affiliation(s)
- Sebastian Kruss
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
| | | | | | | | | | | |
Collapse
|
15
|
Aptasensor for adenosine triphosphate based on electrode–supported lipid bilayer membrane. Mikrochim Acta 2013. [DOI: 10.1007/s00604-013-1100-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
16
|
Tedsana W, Tuntulani T, Ngeontae W. A highly selective turn-on ATP fluorescence sensor based on unmodified cysteamine capped CdS quantum dots. Anal Chim Acta 2013; 783:65-73. [PMID: 23726101 DOI: 10.1016/j.aca.2013.04.037] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2012] [Revised: 03/26/2013] [Accepted: 04/17/2013] [Indexed: 11/25/2022]
Abstract
Unmodified cysteamine capped nanocrystalline cadmium sulfide quantum dots (Cys-CdS QDs) were demonstrated as a selective turn-on fluorescence sensor for sensing adenosine-5'-triphosphate (ATP) in aqueous solution for the first time. The fluorescence intensity of the Cys-CdS QDs was significantly enhanced in the presence of ATP. In addition, the fluorescence intensity of the Cys-CdS QDs increased when increasing ATP concentrations. On the other hand, other phosphate metabolites and other tested common anions did not significantly alter the fluorescence intensity of the Cys-CdS QDs. In addition, this sensor showed excellent discrimination of pyrophosphate (PPi) from ATP detection. The proposed sensor could efficiently be used for ATP sensing at very low concentration with LOD of 17 μM with the linear working concentration range of 20-80 μM. The feasibility of the proposed sensor for determining ATP in urine samples was also studied, and satisfactory results were obtained.
Collapse
Affiliation(s)
- Wimonsiri Tedsana
- Materials Chemistry Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
| | | | | |
Collapse
|
17
|
He X, Li Z, Jia X, Wang K, Yin J. A highly selective sandwich-type FRET assay for ATP detection based on silica coated photon upconverting nanoparticles and split aptamer. Talanta 2013; 111:105-10. [PMID: 23622532 DOI: 10.1016/j.talanta.2013.02.050] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2012] [Revised: 02/18/2013] [Accepted: 02/20/2013] [Indexed: 02/07/2023]
Abstract
In this paper, we report a highly selective sandwich-type fluorescence resonance energy transfer (FRET) assay for ATP detection by combining the unique optical properties of silica coated photon upconverting NaYF4:Yb(3+), Er(3+) nanoparticles (Si@UCNPs) with the high specific recognition ability of ATP aptamer. In the protocol, a single aptamer of ATP was split into two fragments. One of which was covalently attached to the Si@UCNPs at the 5' end, and the other was labeled with Black Hole Quencher-1 (BHQ1) at the 3' end. In the presence of ATP, the two fragments bound ATP with high affinity to form the sandwich complexes on the surface of Si@UCNPs. ATP induced association of the two fragments, thus bringing the Si@UCNPs and BHQ1 into close proximity. Under the illumination of 980 nm laser, energy transfer took place between the Si@UCNPs as the donor and BHQ1 as the acceptor, creating an optical "sandwich-type" assay for ATP detection. By monitoring the fluorescence change of the Si@UCNPs at 550 nm, the presence of the ATP could be quantitatively detected with a detection limit of 1.70 μM. The linear response range was 2 μM-16 μM. The background of this assay was ignorable because the fluorescence intensity of Si@UCNPs at 550 nm was not changed in the absence of ATP. This assay was also able to discriminate ATP from its analogs.
Collapse
Affiliation(s)
- Xiaoxiao He
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of biology, College of Chemistry & Chemical Engineering, Hunan University, Changsha 410082, PR China
| | | | | | | | | |
Collapse
|
18
|
Zhu W, Zhao Z, Li Z, Li H, Jiang J, Shen G, Yu R. A label free exonuclease III-aided fluorescence assay for adenosine triphosphate based on graphene oxide and ligation reaction. NEW J CHEM 2013. [DOI: 10.1039/c2nj41055a] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
|
19
|
Auld D, Lea W, Davis MI, Simeonov A. Literature Search and Review. Assay Drug Dev Technol 2012. [DOI: 10.1089/adt.2012.1005.lr] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Doug Auld
- Novartis Institutes for BioMedical Research, Cambridge, Massachusetts
| | | | | | | |
Collapse
|