201
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Maruyama T, Ishizu N, Eguchi Y, Hosogi T, Goto M. Liquid-liquid extraction of enzymatically synthesized functional RNA oligonucleotides using reverse micelles with a DNA-surfactant. Chem Commun (Camb) 2018; 52:12376-12379. [PMID: 27711339 DOI: 10.1039/c6cc06985a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We successfully implemented solvent extraction of short, single-stranded RNA using reverse micelles (water-in-oil microemulsions) with a DNA-surfactant. A thrombin-binding RNA aptamer was enzymatically synthesized and purified by extraction using the reverse micellar system. The extracted RNA aptamer retained thrombin-binding activity after the extraction procedure.
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Affiliation(s)
- Tatsuo Maruyama
- Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, 1-1 Rokkodaicho, Nada-ku, Kobe 657-8501, Japan.
| | - Naoki Ishizu
- Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, 1-1 Rokkodaicho, Nada-ku, Kobe 657-8501, Japan.
| | - Yuka Eguchi
- Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, 1-1 Rokkodaicho, Nada-ku, Kobe 657-8501, Japan.
| | - Takuya Hosogi
- Department of Applied Chemistry, Graduate School of Engineering and Center for Future Chemistry, Kyushu University, 744 Moto-oka, Fukuoka 819-0395, Japan
| | - Masahiro Goto
- Department of Applied Chemistry, Graduate School of Engineering and Center for Future Chemistry, Kyushu University, 744 Moto-oka, Fukuoka 819-0395, Japan
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202
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Liu Y, Jiang X, Cao W, Sun J, Gao F. Detection of Thrombin Based on Fluorescence Energy Transfer between Semiconducting Polymer Dots and BHQ-Labelled Aptamers. SENSORS (BASEL, SWITZERLAND) 2018; 18:E589. [PMID: 29443917 PMCID: PMC5855441 DOI: 10.3390/s18020589] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 02/05/2018] [Accepted: 02/06/2018] [Indexed: 12/23/2022]
Abstract
Carboxyl-functionalized semiconducting polymer dots (Pdots) were synthesized as an energy donor by the nanoprecipitation method. A black hole quenching dye (BHQ-labelled thrombin aptamers) was used as the energy acceptor, and fluorescence resonance energy transfer between the aptamers and Pdots was used for fluorescence quenching of the Pdots. The addition of thrombin restored the fluorescence intensity. Under the optimized experimental conditions, the fluorescence of the system was restored to the maximum when the concentration of thrombin reached 130 nM, with a linear range of 0-50 nM (R² = 0.990) and a detection limit of 0.33 nM. This sensor was less disturbed by impurities, showing good specificity and signal response to thrombin, with good application in actual samples. The detection of human serum showed good linearity in the range of 0-30 nM (R² = 0.997), with a detection limit of 0.56 nM and a recovery rate of 96.2-104.1%, indicating that this fluorescence sensor can be used for the detection of thrombin content in human serum.
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Affiliation(s)
- Yizhang Liu
- Department of Food and Environmental Engineering, Vocational and Technical College, Chuzhou 239001, China.
- Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Key Laboratory of Chemo/Biosensing, Laboratory of Optical Probes and Bioelectrocatalysis (LOPAB), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, China.
| | - Xuekai Jiang
- Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Key Laboratory of Chemo/Biosensing, Laboratory of Optical Probes and Bioelectrocatalysis (LOPAB), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, China.
| | - Wenfeng Cao
- Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Key Laboratory of Chemo/Biosensing, Laboratory of Optical Probes and Bioelectrocatalysis (LOPAB), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, China.
| | - Junyong Sun
- Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Key Laboratory of Chemo/Biosensing, Laboratory of Optical Probes and Bioelectrocatalysis (LOPAB), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, China.
| | - Feng Gao
- Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Key Laboratory of Chemo/Biosensing, Laboratory of Optical Probes and Bioelectrocatalysis (LOPAB), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, China.
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203
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Bernard ED, Nguyen KC, DeRosa MC, Tayabali AF, Aranda-Rodriguez R. Incorporating Aptamers in the Multiple Analyte Profiling Assays (xMAP): Detection of C-Reactive Protein. Methods Mol Biol 2018; 1575:303-322. [PMID: 28255889 DOI: 10.1007/978-1-4939-6857-2_19] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Aptamers are short oligonucleotide sequences used in detection systems because of their high affinity binding to a variety of macromolecules. With the introduction of aptamers over 25 years ago came the exploration of their use in many different applications as a substitute for antibodies. Aptamers have several advantages; they are easy to synthesize, can bind to analytes for which it is difficult to obtain antibodies, and in some cases bind better than antibodies. As such, aptamer applications have significantly expanded as an adjunct to a variety of different immunoassay designs. The Multiple-Analyte Profiling (xMAP) technology developed by Luminex Corporation commonly uses antibodies for the detection of analytes in small sample volumes through the use of fluorescently coded microbeads. This technology permits the simultaneous detection of multiple analytes in each sample tested and hence could be applied in many research fields. Although little work has been performed adapting this technology for use with apatmers, optimizing aptamer-based xMAP assays would dramatically increase the versatility of analyte detection. We report herein on the development of an xMAP bead-based aptamer/antibody sandwich assay for a biomarker of inflammation (C-reactive protein or CRP). Protocols for the coupling of aptamers to xMAP beads, validation of coupling, and for an aptamer/antibody sandwich-type assay for CRP are detailed. The optimized conditions, protocols and findings described in this research could serve as a starting point for the development of new aptamer-based xMAP assays.
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Affiliation(s)
- Elyse D Bernard
- Environmental Health Science and Research Bureau, Health Canada, 50 Colombine Driveway, Ottawa, ON, Canada, K1A0K9
| | - Kathy C Nguyen
- Environmental Health Science and Research Bureau, Health Canada, 50 Colombine Driveway, Ottawa, ON, Canada, K1A0K9
| | - Maria C DeRosa
- Chemistry Department, Carleton University, Ottawa, ON, Canada
| | - Azam F Tayabali
- Environmental Health Science and Research Bureau, Health Canada, 50 Colombine Driveway, Ottawa, ON, Canada, K1A0K9
| | - Rocio Aranda-Rodriguez
- Environmental Health Science and Research Bureau, Health Canada, 50 Colombine Driveway, Ottawa, ON, Canada, K1A0K9.
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204
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Label-Free Aptasensor for Lysozyme Detection Using Electrochemical Impedance Spectroscopy. SENSORS 2018; 18:s18020354. [PMID: 29373502 PMCID: PMC5855017 DOI: 10.3390/s18020354] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 01/16/2018] [Accepted: 01/23/2018] [Indexed: 11/17/2022]
Abstract
This research develops a label-free aptamer biosensor (aptasensor) based on graphite-epoxy composite electrodes (GECs) for the detection of lysozyme protein using Electrochemical Impedance Spectroscopy (EIS) technique. The chosen immobilization technique was based on covalent bonding using carbodiimide chemistry; for this purpose, carboxylic moieties were first generated on the graphite by electrochemical grafting. The detection was performed using [Fe(CN)6]3−/[Fe(CN)6]4− as redox probe. After recording the frequency response, values were fitted to its electric model using the principle of equivalent circuits. The aptasensor showed a linear response up to 5 µM for lysozyme and a limit of detection of 1.67 µM. The sensitivity of the established method was 0.090 µM−1 in relative charge transfer resistance values. The interference response by main proteins, such as bovine serum albumin and cytochrome c, has been also characterized. To finally verify the performance of the developed aptasensor, it was applied to wine analysis.
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205
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Recent advances in design of electrochemical affinity biosensors for low level detection of cancer protein biomarkers using nanomaterial-assisted signal enhancement strategies. J Pharm Biomed Anal 2018; 147:185-210. [DOI: 10.1016/j.jpba.2017.07.042] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Revised: 07/28/2017] [Accepted: 07/29/2017] [Indexed: 12/12/2022]
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206
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Andrianova M, Komarova N, Grudtsov V, Kuznetsov E, Kuznetsov A. Amplified Detection of the Aptamer-Vanillin Complex with the Use of Bsm DNA Polymerase. SENSORS (BASEL, SWITZERLAND) 2017; 18:E49. [PMID: 29278396 PMCID: PMC5795474 DOI: 10.3390/s18010049] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 12/19/2017] [Accepted: 12/20/2017] [Indexed: 12/01/2022]
Abstract
The electrochemical detection of interactions between aptamers and low-molecular-weight targets often lacks sensitivity. Signal amplification improves the detection of the aptamer-analyte complex; Bsm DNA polymerase was used to amplify the signal from the interaction of vanillin and its aptamer named Van_74 on an ion-sensitive field-effect transistor (ISFET)-based biosensor. The aptamer was immobilized on the ISFET sensitive surface. A short DNA probe was hybridized with the aptamer and dissociated from it upon vanillin addition. A free probe interacted with a special DNA molecular beacon initiated the Bsm DNA polymerase reaction that was detected by ISFET. A buffer solution suitable for both aptamer action and Bsm DNA polymerase activity was determined. The ISFET was shown to detect the Bsm DNA polymerase reaction under the selected conditions. Vanillin at different concentrations (1 × 10-6-1 × 10-8 M) was detected using the biosensor with signal amplification. The developed detection system allowed for the determination of vanillin, starting at a 10-8 M concentration. Application of the Bsm DNA polymerase resulted in a 15.5 times lower LoD when compared to the biosensor without signal amplification (10.1007/s00604-017-2586-4).
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Affiliation(s)
- Mariia Andrianova
- Scientific-Manufacturing Complex Technological Centre, 1-7 Shokin Square, Zelenograd, 124498 Moscow, Russia.
| | - Natalia Komarova
- Scientific-Manufacturing Complex Technological Centre, 1-7 Shokin Square, Zelenograd, 124498 Moscow, Russia.
| | - Vitaliy Grudtsov
- Scientific-Manufacturing Complex Technological Centre, 1-7 Shokin Square, Zelenograd, 124498 Moscow, Russia.
| | - Evgeniy Kuznetsov
- Scientific-Manufacturing Complex Technological Centre, 1-7 Shokin Square, Zelenograd, 124498 Moscow, Russia.
| | - Alexander Kuznetsov
- Scientific-Manufacturing Complex Technological Centre, 1-7 Shokin Square, Zelenograd, 124498 Moscow, Russia.
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207
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Jauset-Rubio M, El-Shahawi MS, Bashammakh AS, Alyoubi AO, O′Sullivan CK. Advances in aptamers-based lateral flow assays. Trends Analyt Chem 2017. [DOI: 10.1016/j.trac.2017.10.010] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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208
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Current advances and future visions on bioelectronic immunosensing for prostate-specific antigen. Biosens Bioelectron 2017; 98:267-284. [DOI: 10.1016/j.bios.2017.06.049] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Revised: 06/13/2017] [Accepted: 06/25/2017] [Indexed: 01/28/2023]
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209
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Wang M, Hu B, Ji H, Song Y, Liu J, Peng D, He L, Zhang Z. Aptasensor Based on Hierarchical Core-Shell Nanocomposites of Zirconium Hexacyanoferrate Nanoparticles and Mesoporous mFe 3O 4@mC: Electrochemical Quantitation of Epithelial Tumor Marker Mucin-1. ACS OMEGA 2017; 2:6809-6818. [PMID: 30023533 PMCID: PMC6044583 DOI: 10.1021/acsomega.7b01065] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Accepted: 09/19/2017] [Indexed: 06/08/2023]
Abstract
A novel nanostructured hierarchical core-shell nanocomposite of zirconium hexacyanoferrate (ZrHCF) and a mesoporous nanomaterial composed of Fe3O4 and carbon nanospheres (denoted as ZrHCF@mFe3O4@mC) was prepared and used as a novel platform for an aptasensor to detect the epithelial tumor marker mucin-1 (MUC1) sensitively and selectively. The prepared ZrHCF@mFe3O4@mC nanocomposite exhibited good chemical functionality, water stability, and high specific surface area. Therefore, large amounts of aptamer molecules resulted in high sensitivity of the developed electrochemical aptasensor toward traces of MUC1. The constructed sensor also showed a good linear relationship with the logarithm of MUC1 concentration in the broad range of 0.01 ng·mL-1 to 1.0 μg·mL-1, with a low detection limit of 0.90 pg·mL-1. The fabricated ZrHCF@mFe3O4@mC-based aptasensor exhibited not only high selectivity because of the formation of aptamer-MUC1 complex but also good stability, acceptable reproducibility, and applicability. The proposed novel strategy based on a newly prepared hierarchical core-shell nanocomposite demonstrated outstanding biosensing performance and presents potential applications in biomedical fields.
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210
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Yadavalli T, Agelidis A, Jaishankar D, Mangano K, Thakkar N, Penmetcha K, Shukla D. Targeting Herpes Simplex Virus-1 gD by a DNA Aptamer Can Be an Effective New Strategy to Curb Viral Infection. MOLECULAR THERAPY-NUCLEIC ACIDS 2017; 9:365-378. [PMID: 29246315 PMCID: PMC5686428 DOI: 10.1016/j.omtn.2017.10.009] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Revised: 10/13/2017] [Accepted: 10/14/2017] [Indexed: 11/03/2022]
Abstract
Herpes simplex virus type 1 (HSV-1) is an important factor for vision loss in developed countries. A challenging aspect of the ocular infection by HSV-1 is that common treatments, such as acyclovir, fail to provide effective topical remedies. Furthermore, it is not very clear whether the viral glycoproteins, required for HSV-1 entry into the host, can be targeted for an effective therapy against ocular herpes in vivo. Here, we demonstrate that HSV-1 envelope glycoprotein gD, which is essential for viral entry and spread, can be specifically targeted by topical applications of a small DNA aptamer to effectively control ocular infection by the virus. Our 45-nt-long DNA aptamer showed high affinity for HSV-1 gD (binding affinity constant [Kd] = 50 nM), which is strong enough to disrupt the binding of gD to its cognate host receptors. Our studies showed significant restriction of viral entry and replication in both in vitro and ex vivo studies. In vivo experiments in mice also resulted in loss of ocular infection under prophylactic treatment and statistically significant lower infection under therapeutic modality compared to random DNA controls. Thus, our studies validate the possibility that targeting HSV-1 entry glycoproteins, such as gD, can locally reduce the spread of infection and define a novel DNA aptamer-based approach to control HSV-1 infection of the eye.
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Affiliation(s)
- Tejabhiram Yadavalli
- Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Alex Agelidis
- Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, Chicago, IL 60612, USA; Department of Microbiology and Immunology, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Dinesh Jaishankar
- Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, Chicago, IL 60612, USA; Department of Bioengineering, University of Illinois at Chicago, Chicago, IL 60607, USA
| | - Kyle Mangano
- Medicinal Chemistry and Pharmacognosy, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Neel Thakkar
- Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Kumar Penmetcha
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Science City, Ibaraki 305-8566, Japan
| | - Deepak Shukla
- Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, Chicago, IL 60612, USA; Department of Microbiology and Immunology, University of Illinois at Chicago, Chicago, IL 60612, USA; Department of Bioengineering, University of Illinois at Chicago, Chicago, IL 60607, USA.
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211
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Zhai TT, Ye D, Zhang QW, Wu ZQ, Xia XH. Highly Efficient Capture and Electrochemical Release of Circulating Tumor Cells by Using Aptamers Modified Gold Nanowire Arrays. ACS APPLIED MATERIALS & INTERFACES 2017; 9:34706-34714. [PMID: 28925689 DOI: 10.1021/acsami.7b11107] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The effective capture and release of circulating tumor cells (CTCs) is of significant importance in cancer prognose and treatment. Here we report a highly efficient method to capture and release human leukemic lymphoblasts (CCRF-CEM) using aptamers modified gold nanowire arrays (AuNWs). The gold nanowires, showing tunable morphologies from relatively random pillar deposit to relatively uniform arrays, were fabricated by electrochemical deposition using anodic aluminum oxide (AAO) as template. Upon simply being modified with aptamers by Au-S chemistry, the AuNWs exhibit higher specificity to target cells. Also compared to flat gold substrate, the AuNWs with nanostructure can capture target cells with much higher capture yield. Moreover, the captured CCRF-CEM cells can be released from AuNWs efficiently with little damage through an electrochemical desorption process. We predict that our strategy has great potential in providing a simple and economical platform for CTCs isolation, cancer diagnosis, and therapy.
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Affiliation(s)
- Ting-Ting Zhai
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, China
| | - Dekai Ye
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, China
| | - Qian-Wen Zhang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, China
| | - Zeng-Qiang Wu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, China
| | - Xing-Hua Xia
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, China
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212
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Ng YZ, Baldera-Aguayo PA, Cornish VW. Fluorescence Polarization Assay for Small Molecule Screening of FK506 Biosynthesized in 96-Well Microtiter Plates. Biochemistry 2017; 56:5260-5268. [PMID: 28841306 DOI: 10.1021/acs.biochem.7b00602] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The fluorescence polarization (FP) assay has been widely used to study enzyme kinetics, antibody-antigen interactions, and other biological interactions. We propose that the FP assay can be adapted as a high-throughput and potentially widely applicable screen for small molecules. This is useful in metabolic engineering, which is a promising approach to synthesizing compounds of pharmaceutical, agricultural, and industrial importance using bioengineered strains. There, the development of high-yield strains is often a costly and time-consuming process. This problem can be addressed by generating and testing large mutant strain libraries. However, a current key bottleneck is the lack of high-throughput screens to detect the small molecule products. The FP assay is quantitative, sensitive, fast, and cheap. As a proof of principle, we established the FP assay to screen for FK506 (tacrolimus) produced by Streptomyces tsukubaensis, which was cultivated in 96-well plates. An ultraviolet mutagenized library of 160 colonies was screened to identify strains showing higher FK506 productivities. The FP assay has the potential to be generalized to detect a wide range of other small molecules.
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Affiliation(s)
- Yao Zong Ng
- Department of Chemistry, Columbia University in the City of New York , 550 West 120th Street, Northwest Corner Building 1206, New York, New York 10027, United States
| | - Pedro A Baldera-Aguayo
- Integrated Program in Cellular, Molecular and Biomedical Studies, Columbia University in the City of New York , New York, New York 10032, United States.,Department of Systems Biology, Irving Cancer Research Center, Columbia University in the City of New York , 1130 St. Nicholas Avenue, New York, New York 10032, United States
| | - Virginia W Cornish
- Department of Chemistry, Columbia University in the City of New York , 550 West 120th Street, Northwest Corner Building 1206, New York, New York 10027, United States.,Department of Systems Biology, Irving Cancer Research Center, Columbia University in the City of New York , 1130 St. Nicholas Avenue, New York, New York 10032, United States
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213
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Zhang S, Geryak R, Geldmeier J, Kim S, Tsukruk VV. Synthesis, Assembly, and Applications of Hybrid Nanostructures for Biosensing. Chem Rev 2017; 117:12942-13038. [DOI: 10.1021/acs.chemrev.7b00088] [Citation(s) in RCA: 206] [Impact Index Per Article: 29.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Shuaidi Zhang
- School of Materials Science
and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, United States
| | - Ren Geryak
- School of Materials Science
and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, United States
| | - Jeffrey Geldmeier
- School of Materials Science
and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, United States
| | - Sunghan Kim
- School of Materials Science
and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, United States
| | - Vladimir V. Tsukruk
- School of Materials Science
and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, United States
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214
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Albanese CM, Suttapitugsakul S, Perati S, McGown LB. A genome-inspired, reverse selection approach to aptamer discovery. Talanta 2017; 177:150-156. [PMID: 29108569 DOI: 10.1016/j.talanta.2017.08.093] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 08/08/2017] [Accepted: 08/29/2017] [Indexed: 11/29/2022]
Abstract
Limitations of Systematic Evolution of Ligands by Exponential Enrichment (SELEX) and related methods that depend upon combinatorial oligonucleotide libraries have hindered progress in this area. Our laboratory has introduced a new approach to aptamer discovery that uses oligonucleotides with sequences drawn from the human genome to capture proteins from biological samples. Specifically, we have focused on capture of proteins in nuclear extracts from human cell lines using G-quadruplex (G4) forming genomic sequences. Previous studies identified capture of several proteins both in vitro and in live cells by the Pu28-mer sequence from the ERBB2 promoter region. Here we provide a more comprehensive study of protein capture from BT474 and MCF7 human breast cancer cells using G4-forming sequences from the CMYC, RB, VEGF and ERBB2 human oncogene promoter regions. Mass spectrometric analysis and Western blot analysis of protein capture at oligonucleotide-modified surfaces revealed capture of nucleolin by all three of the oligonucleotides in BT474 and MCF7 cells, and also of ribosomal protein L19 (RPL19) in BT474 cells. Chromatin immunoprecipitation (ChIP) analysis confirmed the interaction of nucleolin with all three promoter sequences in MCF7 cells and with RB in BT474 cells. ChIP also revealed interactions of RPL19 with CMYC in BT474 cells and of both RPL19 and ribosomal protein L14 (RPL14) with ERBB2 in BT474 cells. These results offer the basis for development of new aptamers based on the G4 sequences from the CMYC, RB, VEGF, and ERBB2 promoters toward proteins including nucleolin, RPL19 and RPL14. These interactions also may have biological and therapeutic significance.
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Affiliation(s)
- Christina M Albanese
- Department of Chemistry and Chemical Biology, Rensselaer Polytechnic Institute, 110 8th Street, Troy, NY 12180, USA
| | - Suttipong Suttapitugsakul
- Department of Chemistry and Chemical Biology, Rensselaer Polytechnic Institute, 110 8th Street, Troy, NY 12180, USA
| | - Shruthi Perati
- Department of Chemistry and Chemical Biology, Rensselaer Polytechnic Institute, 110 8th Street, Troy, NY 12180, USA
| | - Linda B McGown
- Department of Chemistry and Chemical Biology, Rensselaer Polytechnic Institute, 110 8th Street, Troy, NY 12180, USA.
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215
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Meirinho SG, Dias LG, Peres AM, Rodrigues LR. Electrochemical aptasensor for human osteopontin detection using a DNA aptamer selected by SELEX. Anal Chim Acta 2017; 987:25-37. [PMID: 28916037 DOI: 10.1016/j.aca.2017.07.071] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Revised: 05/30/2017] [Accepted: 07/27/2017] [Indexed: 02/07/2023]
Abstract
A DNA aptamer with affinity and specificity for human osteopontin (OPN), a potential breast cancer biomarker, was selected using the SELEX process, considering its homology rate and the stability of its secondary structures. This aptamer exhibited a satisfactory affinity towards OPN, showing dissociation constants lower than 2.5 nM. It was further used to develop a simple, label-free electrochemical aptasensor against OPN. The aptasensor showed good sensitivity towards OPN in standard solutions, being the square wave voltammetry (SWV), compared to the cyclic voltammetry, the most sensitive technique with detection and quantification limits of 1.4 ± 0.4 nM and 4.2 ± 1.1 nM, respectively. It showed good reproducibility and acceptable selectivity, exhibiting low signal interferences from other proteins, as thrombin, with 2.6-10 times lower current signals-off than for OPN. The aptasensor also successfully detected OPN in spiked synthetic human plasma. Using SWV, detection and quantification limits (1.3 ± 0.1 and 3.9 ± 0.4 nM) within the OPN plasma levels reported for patients with breast cancer (0.4-4.5 nM) or with metastatic or recurrent breast cancer (0.9-8.4 nM) were found. Moreover, preliminary assays, using a sample of human plasma, showed that the aptasensor and the standard ELISA method quantified similar OPN levels (2.2 ± 0.7 and 1.7 ± 0.1 nM, respectively). Thus, our aptasensor coupled with SWV represents a promising alternative for the detection of relevant breast cancer biomarkers.
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Affiliation(s)
- Sofia G Meirinho
- Laboratory of Separation and Reaction Engineering, Laboratory of Catalysis and Materials (LSRE-LCM), ESA, Instituto Politécnico de Bragança, Campus Santa Apolónia, 5300-253 Bragança, Portugal; CEB - Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal.
| | - Luís G Dias
- ESA - Instituto Politécnico de Bragança, Campus Santa Apolónia, 5300-253 Bragança, Portugal; CQ-VR - Centro de Química - Vila Real, University of Trás-os-Montes, Apartado 1013, 5001-801 Vila Real, Portugal
| | - António M Peres
- Laboratory of Separation and Reaction Engineering, Laboratory of Catalysis and Materials (LSRE-LCM), ESA, Instituto Politécnico de Bragança, Campus Santa Apolónia, 5300-253 Bragança, Portugal
| | - Lígia R Rodrigues
- CEB - Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
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216
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Yu Y, Su G, Zhu H, Zhu Q, Chen Y, Xu B, Li Y, Zhang W. Proximity hybridization-mediated isothermal exponential amplification for ultrasensitive electrochemical protein detection. Int J Nanomedicine 2017; 12:5903-5914. [PMID: 28860756 PMCID: PMC5566414 DOI: 10.2147/ijn.s142015] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
In this study, we fabricated a novel electrochemical biosensing platform on the basis of target-triggered proximity hybridization-mediated isothermal exponential amplification reaction (EXPAR) for ultrasensitive protein analysis. Through rational design, the aptamers for protein recognition were integrated within two DNA probes. Via proximity hybridization principle, the affinity protein-binding event was converted into DNA assembly process. The recognition of protein by aptamers can trigger the strand displacement through the increase of the local concentrations of the involved probes. As a consequence, the output DNA was displaced, which can hybridize with the duplex probes immobilized on the electrode surface subsequently, leading to the initiation of the EXPAR as well as the cleavage of duplex probes. Each cleavage will release the gold nanoparticles (AuNPs) binding sequence. With the modification of G-quadruplex sequence, electrochemical signals were yielded by the AuNPs through oxidizing 3,3',5,5'-tetramethylbenzidine in the presence of H2O2. The study we proposed exhibited high sensitivity toward platelet-derived growth factor BB (PDGF-BB) with the detection limit of 52 fM. And, this method also showed great selectivity among the PDGF isoforms and performed well in spiked human serum samples.
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Affiliation(s)
- Yanyan Yu
- School of Pharmacy, Nantong University, Nantong, People's Republic of China
| | - Gaoxing Su
- School of Pharmacy, Nantong University, Nantong, People's Republic of China
| | - Hongyan Zhu
- School of Pharmacy, Nantong University, Nantong, People's Republic of China
| | - Qing Zhu
- School of Pharmacy, Nantong University, Nantong, People's Republic of China
| | - Yong Chen
- School of Pharmacy, Nantong University, Nantong, People's Republic of China
| | - Bohui Xu
- School of Pharmacy, Nantong University, Nantong, People's Republic of China
| | - Yuqin Li
- School of Pharmacy, Nantong University, Nantong, People's Republic of China
| | - Wei Zhang
- School of Pharmacy, Nantong University, Nantong, People's Republic of China
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217
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Tavakoli J, Tang Y. Hydrogel Based Sensors for Biomedical Applications: An Updated Review. Polymers (Basel) 2017; 9:E364. [PMID: 30971040 PMCID: PMC6418953 DOI: 10.3390/polym9080364] [Citation(s) in RCA: 188] [Impact Index Per Article: 26.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Revised: 08/10/2017] [Accepted: 08/12/2017] [Indexed: 02/07/2023] Open
Abstract
Biosensors that detect and convert biological reactions to a measurable signal have gained much attention in recent years. Between 1950 and 2017, more than 150,000 papers have been published addressing the applications of biosensors in different industries, but to the best of our knowledge and through careful screening, critical reviews that describe hydrogel based biosensors for biomedical applications are rare. This review discusses the biomedical application of hydrogel based biosensors, based on a search performed through Web of Science Core, PubMed (NLM), and Science Direct online databases for the years 2000⁻2017. In this review, we consider bioreceptors to be immobilized on hydrogel based biosensors, their advantages and disadvantages, and immobilization techniques. We identify the hydrogels that are most favored for this type of biosensor, as well as the predominant transduction strategies. We explain biomedical applications of hydrogel based biosensors including cell metabolite and pathogen detection, tissue engineering, wound healing, and cancer monitoring, and strategies for small biomolecules such as glucose, lactate, urea, and cholesterol detection are identified.
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Affiliation(s)
- Javad Tavakoli
- Medical Device Research Institute, College of Science and Engineering, Flinders University, Adelaide 5042, SA, Australia.
| | - Youhong Tang
- Institute for Nano Scale Science & Technology, College of Science and Engineering, Flinders University, Adelaide 5042, SA, Australia.
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218
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Aptamer-assisted novel technologies for detecting bacterial pathogens. Biomed Pharmacother 2017; 93:737-745. [PMID: 28700978 DOI: 10.1016/j.biopha.2017.07.011] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 06/18/2017] [Accepted: 07/05/2017] [Indexed: 01/08/2023] Open
Abstract
Nowadays, all people are at risk of infectious diseases that are mainly caused by bacteria causing infection. There is a permanent demand for an appropriate detection method that is affordable, practical, careful, rapid, sensitive, efficient and economical. Aptamers are single stranded DNA or RNA oligonucleotides, which can be recognized specifically and bind to their target molecules and also, be exploited in diagnostic applications. Recently, aptamer-based systems have offered great potentials in applications for the recognition of several important bacterial pathogens from clinical and food specimens. There are several reports appraising the diagnostic applicability of aptamer-based systems for the detection of pathogens. As for its excellent sensitivity, as well as its rapid and efficient detectability, this technique may be practical to indicate bacterial targets with less sample size and may consume less time than traditional methods These systems offer a promising approach for the sensitive and quick detection of food-borne and clinical agents. This review provides an overview of aptamer-based methods as a novel approach for detecting bacterial pathogens.
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219
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Jafari M, Rezaei M, Kalantari H, Tabarzad M, Daraei B. DNAzyme-aptamer or aptamer-DNAzyme paradigm: Biochemical approach for aflatoxin analysis. Biotechnol Appl Biochem 2017; 65:274-280. [PMID: 28326608 DOI: 10.1002/bab.1563] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Accepted: 03/15/2017] [Indexed: 12/22/2022]
Abstract
DNAzyme and aptamer conjugations have already been used for sensitive and accurate detection of several molecules. In this study, we tested the relationship between conjugation orientation of DNAzyme and aflatoxin B1 aptamer and their subsequent peroxidase activity. Circular dichroism (CD) spectroscopy and biochemical analysis were used here to differentiate between these two conjugation patterns. Results showed that DNAzyme-aptamer has more catalytic activity and efficiency than aptamer-DNAzyme. Thereby, DNAzyme-aptamer with its superior efficiency can be used for design and development of more sensitive aflatoxin B1 DNA based biosensors.
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Affiliation(s)
- Marzieh Jafari
- Department of Pharmacology and Toxicology, School of Pharmacy, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Mohsen Rezaei
- Department of Pharmacology and Toxicology, School of Pharmacy, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.,Department of Toxicology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Heibatullah Kalantari
- Department of Pharmacology and Toxicology, School of Pharmacy, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Maryam Tabarzad
- Protein Technology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Bahram Daraei
- Department of Toxicology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
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220
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Pur MRK, Hosseini M, Faridbod F, Ganjali MR. Highly sensitive label-free electrochemiluminescence aptasensor for early detection of myoglobin, a biomarker for myocardial infarction. Mikrochim Acta 2017. [DOI: 10.1007/s00604-017-2385-y] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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221
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Affiliation(s)
- Wenhu Zhou
- Xiangya
School of Pharmaceutical Sciences, Central South University, Changsha, Hunan 410013, China
- Department
of Chemistry, Water Institute, and Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
| | - Runjhun Saran
- Department
of Chemistry, Water Institute, and Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
| | - Juewen Liu
- Department
of Chemistry, Water Institute, and Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
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222
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Obeng EM, Dullah EC, Razak NSA, Danquah MK, Budiman C, Ongkudon CM. Elucidating endotoxin-biomolecule interactions with FRET: extending the frontiers of their supramolecular complexation. J Biol Methods 2017; 4:e71. [PMID: 31453229 PMCID: PMC6706125 DOI: 10.14440/jbm.2017.172] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Revised: 01/24/2017] [Accepted: 02/28/2017] [Indexed: 01/22/2023] Open
Abstract
Endotoxin has been one of the topical chemical contaminants of major concern to researchers, especially in the field of bioprocessing. This major concern of researchers stems from the fact that the presence of Gram-negative bacterial endotoxin in intracellular products is unavoidable and requires complex downstream purification steps. For instance, endotoxin interacts with recombinant proteins, peptides, antibodies and aptamers and these interactions have formed the foundation for most biosensors for endotoxin detection. It has become imperative for researchers to engineer reliable means/techniques to detect, separate and remove endotoxin, without compromising the quality and quantity of the end-product. However, the underlying mechanism involved during endotoxin-biomolecule interaction is still a gray area. The use of quantitative molecular microscopy that provides high resolution of biomolecules is highly promising, hence, may lead to the development of improved endotoxin detection strategies in biomolecule preparation. Förster resonance energy transfer (FRET) spectroscopy is one of the emerging most powerful tools compatible with most super-resolution techniques for the analysis of molecular interactions. However, the scope of FRET has not been well-exploited in the analysis of endotoxin-biomolecule interaction. This article reviews endotoxin, its pathophysiological consequences and the interaction with biomolecules. Herein, we outline the common potential ways of using FRET to extend the current understanding of endotoxin-biomolecule interaction with the inference that a detailed understanding of the interaction is a prerequisite for the design of strategies for endotoxin identification and removal from protein milieus.
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Affiliation(s)
- Eugene M Obeng
- Biotechnology Research Institute, University Malaysia Sabah, Kota Kinabalu, Sabah 88400, Malaysia
| | - Elvina C Dullah
- Biotechnology Research Institute, University Malaysia Sabah, Kota Kinabalu, Sabah 88400, Malaysia
| | | | - Michael K Danquah
- Department of Chemical Engineering, Curtin University Sarawak, Miri, Sarawak 98009, Malaysia
| | - Cahyo Budiman
- Biotechnology Research Institute, University Malaysia Sabah, Kota Kinabalu, Sabah 88400, Malaysia
| | - Clarence M Ongkudon
- Biotechnology Research Institute, University Malaysia Sabah, Kota Kinabalu, Sabah 88400, Malaysia
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223
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Wang S, Zhang L, Wan S, Cansiz S, Liu Y, Cai R, Hong CY, Teng IT, Shi M, Wu Y, Dong Y, Tan W. Aptasensor with Expanded Nucleotide Using DNA Nanotetrahedra for Electrochemical Detection of Cancerous Exosomes. ACS NANO 2017; 11:3943-3949. [PMID: 28287705 PMCID: PMC5518691 DOI: 10.1021/acsnano.7b00373] [Citation(s) in RCA: 300] [Impact Index Per Article: 42.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Exosomes are extracellular vesicles (50-100 nm) circulating in biofluids as intercellular signal transmitters. Although the potential of cancerous exosomes as tumor biomarkers is promising, sensitive and rapid detection of exosomes remains challenging. Herein, we combined the strengths of advanced aptamer technology, DNA-based nanostructure, and portable electrochemical devices to develop a nanotetrahedron (NTH)-assisted aptasensor for direct capture and detection of hepatocellular exosomes. The oriented immobilization of aptamers significantly improved the accessibility of an artificial nucleobase-containing aptamer to suspended exosomes, and the NTH-assisted aptasensor could detect exosomes with 100-fold higher sensitivity when compared to the single-stranded aptamer-functionalized aptasensor. The present study provides a proof-of-concept for sensitive and efficient quantification of tumor-derived exosomes. We thus expect the NTH-assisted electrochemical aptasensor to become a powerful tool for comprehensive exosome studies.
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Affiliation(s)
- Sai Wang
- Beijing Key Laboratory of Bioprocess, College of Life
Science and Technology, Beijing University of Chemical Technology, Beijing 100029,
China
- Department of Chemistry and Department of Physiology and
Functional Genomics, Center for Research at the Bio/Nano Interface, Health Cancer
Center, McKnight Brain Institute, UF Genetics Institute, University of Florida,
Gainesville, Florida 32611-7200, United States
| | - Liqin Zhang
- Molecular Science and Biomedicine Laboratory, State Key
Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical
Engineering, College of Biology, Collaborative Innovation Center for Chemistry and
Molecular Medicine, Hunan University, Changsha 410082, China
- Department of Chemistry and Department of Physiology and
Functional Genomics, Center for Research at the Bio/Nano Interface, Health Cancer
Center, McKnight Brain Institute, UF Genetics Institute, University of Florida,
Gainesville, Florida 32611-7200, United States
| | - Shuo Wan
- Department of Chemistry and Department of Physiology and
Functional Genomics, Center for Research at the Bio/Nano Interface, Health Cancer
Center, McKnight Brain Institute, UF Genetics Institute, University of Florida,
Gainesville, Florida 32611-7200, United States
| | - Sena Cansiz
- Department of Chemistry and Department of Physiology and
Functional Genomics, Center for Research at the Bio/Nano Interface, Health Cancer
Center, McKnight Brain Institute, UF Genetics Institute, University of Florida,
Gainesville, Florida 32611-7200, United States
| | - Yuan Liu
- Molecular Science and Biomedicine Laboratory, State Key
Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical
Engineering, College of Biology, Collaborative Innovation Center for Chemistry and
Molecular Medicine, Hunan University, Changsha 410082, China
- Department of Chemistry and Department of Physiology and
Functional Genomics, Center for Research at the Bio/Nano Interface, Health Cancer
Center, McKnight Brain Institute, UF Genetics Institute, University of Florida,
Gainesville, Florida 32611-7200, United States
| | - Ren Cai
- Department of Chemistry and Department of Physiology and
Functional Genomics, Center for Research at the Bio/Nano Interface, Health Cancer
Center, McKnight Brain Institute, UF Genetics Institute, University of Florida,
Gainesville, Florida 32611-7200, United States
| | - Cheng-Yi Hong
- Department of Chemistry and Department of Physiology and
Functional Genomics, Center for Research at the Bio/Nano Interface, Health Cancer
Center, McKnight Brain Institute, UF Genetics Institute, University of Florida,
Gainesville, Florida 32611-7200, United States
| | - I-Ting Teng
- Department of Chemistry and Department of Physiology and
Functional Genomics, Center for Research at the Bio/Nano Interface, Health Cancer
Center, McKnight Brain Institute, UF Genetics Institute, University of Florida,
Gainesville, Florida 32611-7200, United States
| | - Muling Shi
- Molecular Science and Biomedicine Laboratory, State Key
Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical
Engineering, College of Biology, Collaborative Innovation Center for Chemistry and
Molecular Medicine, Hunan University, Changsha 410082, China
- Department of Chemistry and Department of Physiology and
Functional Genomics, Center for Research at the Bio/Nano Interface, Health Cancer
Center, McKnight Brain Institute, UF Genetics Institute, University of Florida,
Gainesville, Florida 32611-7200, United States
| | - Yuan Wu
- Molecular Science and Biomedicine Laboratory, State Key
Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical
Engineering, College of Biology, Collaborative Innovation Center for Chemistry and
Molecular Medicine, Hunan University, Changsha 410082, China
- Department of Chemistry and Department of Physiology and
Functional Genomics, Center for Research at the Bio/Nano Interface, Health Cancer
Center, McKnight Brain Institute, UF Genetics Institute, University of Florida,
Gainesville, Florida 32611-7200, United States
| | - Yiyang Dong
- Beijing Key Laboratory of Bioprocess, College of Life
Science and Technology, Beijing University of Chemical Technology, Beijing 100029,
China
| | - Weihong Tan
- Molecular Science and Biomedicine Laboratory, State Key
Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical
Engineering, College of Biology, Collaborative Innovation Center for Chemistry and
Molecular Medicine, Hunan University, Changsha 410082, China
- Department of Chemistry and Department of Physiology and
Functional Genomics, Center for Research at the Bio/Nano Interface, Health Cancer
Center, McKnight Brain Institute, UF Genetics Institute, University of Florida,
Gainesville, Florida 32611-7200, United States
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224
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Liu H, Ma C, Ning F, Chen H, He H, Wang K, Wang J. A facile label-free G-quadruplex based fluorescent aptasensor method for rapid detection of ATP. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 175:164-167. [PMID: 28038373 DOI: 10.1016/j.saa.2016.12.033] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Revised: 12/15/2016] [Accepted: 12/20/2016] [Indexed: 06/06/2023]
Abstract
The present work demonstrates a simple, rapid and label-free ATP detection method using a fluorescent aptasensor that is based on G-quadruplex formation. In the absence of ATP, the Thioflavin T (ThT) dye binds to the G-rich ATP aptamer and forms an ATP aptamer/ThT G-quadruplex complex, which results in high fluorescence intensity. Upon addition of ATP, the ATP aptamer/ThT complex will be replaced by the formation of an ATP aptamer/ATP complex. During this process, separation of the ThT dye from the ATP aptamer/ThT complex decreases the fluorescence intensity of the reaction mixture dramatically. This fluorescence aptasensor is highly sensitive and rapid, with a detection limit of 18nM and a total reaction time of only 10min. Furthermore, this method is cost-effective and simple, removing the requirement for labeling the detection reagents with a fluorophore-quencher pair.
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Affiliation(s)
- Haisheng Liu
- State Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha 410013, China
| | - Changbei Ma
- State Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha 410013, China.
| | - Feng Ning
- State Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha 410013, China
| | - Hanchun Chen
- State Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha 410013, China
| | - Hailun He
- State Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha 410013, China
| | - Kemin Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410081, China
| | - Jun Wang
- State Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha 410013, China
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225
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A simple and sensitive aptasensor for colorimetric detection of adenosine triphosphate based on unmodified gold nanoparticles. Talanta 2017; 168:279-285. [PMID: 28391854 DOI: 10.1016/j.talanta.2017.03.014] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2016] [Revised: 02/28/2017] [Accepted: 03/02/2017] [Indexed: 12/20/2022]
Abstract
A simple and sensitive colorimetric aptasensor for rapid and facile detection of adenosine triphosphate (ATP) has been demonstrated here based on aptamer-based hairpin probes and unmodified gold nanoparticles (AuNPs). The hairpin probe is constructed by adding another five nucleotides to the 5'-end of an anti-ATP aptamer which can hybridize to nucleotides at the 3'-end of the aptamer, forming a hairpin-shaped structure. In the absence of ATP, the hairpin probes are rigid, and the AuNPs are susceptible to salt-induced aggregation. Conversely, upon binding with target ATP, the hairpin probes undergo conformational changes, forming aptamer-ATP complexes and exposing flexible ends which coat the surface of AuNPs to inhibit their aggregation in the high salt solution. Subsequently, a blue-to-red color change can be recognized by the naked eye. The aptasensor achieved selective responses toward ATP with a detection limit of 0.1μM, and exhibited high-quality detection performance in biological samples. In addition, this detection method is simple, rapid and cost-effective, holding great potential for further applications in point-of-care research.
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226
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Hou Y, Liu J, Hong M, Li X, Ma Y, Yue Q, Li CZ. A reusable aptasensor of thrombin based on DNA machine employing resonance light scattering technique. Biosens Bioelectron 2017; 92:259-265. [PMID: 28231553 DOI: 10.1016/j.bios.2017.02.024] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Revised: 01/28/2017] [Accepted: 02/16/2017] [Indexed: 10/20/2022]
Abstract
The design of molecular nanodevices attracted great interest in these years. Herein, a reusable, sensitive and specific aptasensor was constructed based on an extension-contraction movement of DNA interconversion for the application of human thrombin detection. The present biosensor was based on resonance light scattering (RLS) using magnetic nanoparticles (MNPs) as the RLS probe. MNPs coated with streptavidin can combine with biotin labeled thrombin aptamers. The combined nanoparticles composite is monodispersed in aqueous medium. When thrombin was added a sandwich structure can form on the surface of MNPs, which induced MNPs aggregation. RLS signal was therefore enhanced, and there is a linear relationship between RLS increment and thrombin concentration in the range of 60pM-6.0nM with a limit of detection at 3.5pM (3.29SB/m, according to the recent recommendation of IUPAC). The present aptasensor can be repeatedly used for at least 6 cycling times by heat to transfer G-quadruplex conformation to single strand of DNA sequence and release thrombin. MNPs can be captured by applying the external magnetic field. Furthermore, the proposed biosensor was successfully applied to detect thrombin in human plasma.
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Affiliation(s)
- Yining Hou
- Department of Chemistry, Liaocheng University, Liaocheng 252059, China
| | - Jifeng Liu
- Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Min Hong
- Department of Chemistry, Liaocheng University, Liaocheng 252059, China
| | - Xia Li
- Department of Chemistry, Liaocheng University, Liaocheng 252059, China
| | - Yanhua Ma
- Department of Chemistry, Liaocheng University, Liaocheng 252059, China
| | - Qiaoli Yue
- Department of Chemistry, Liaocheng University, Liaocheng 252059, China.
| | - Chen-Zhong Li
- Nanobioengineering/Bioelectronics Laboratory, Department of Biomedical Engineering, Florida International University, Miami, FL 33174, USA.
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227
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Wu N, Willner I. Programmed dissociation of dimer and trimer origami structures by aptamer-ligand complexes. NANOSCALE 2017; 9:1416-1422. [PMID: 28084482 DOI: 10.1039/c6nr08209b] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Dimer- and trimer-origami frames are bridged by duplexes that include caged, sequence-specific, anti-ATP and/or anti-cocaine aptamer sequences. The programmed dissociation of the origami dimers or trimers in the presence of ATP and/or cocaine ligands is demonstrated. The processes are followed by AFM imaging and by electrophoretic experiments.
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Affiliation(s)
- Na Wu
- Institute of Chemistry, The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.
| | - Itamar Willner
- Institute of Chemistry, The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.
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228
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Wang K, He MQ, Zhai FH, He RH, Yu YL. A novel electrochemical biosensor based on polyadenine modified aptamer for label-free and ultrasensitive detection of human breast cancer cells. Talanta 2017; 166:87-92. [PMID: 28213264 DOI: 10.1016/j.talanta.2017.01.052] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2016] [Revised: 01/11/2017] [Accepted: 01/16/2017] [Indexed: 10/20/2022]
Abstract
Simple, rapid, sensitive, and specific detection of cancer cells plays a pivotal role in the diagnosis and prognosis of cancer. A sandwich electrochemical biosensor was developed based on polyadenine (polydA)-aptamer modified gold electrode (GE) and polydA-aptamer functionalized gold nanoparticles/graphene oxide (AuNPs/GO) hybrid for the label-free and selective detection of breast cancer cells (MCF-7) via a differential pulse voltammetry (DPV) technique. Due to the intrinsic affinity between multiple consecutive adenines of polydA sequences and gold, polydA modified aptamer instead of thiol terminated aptamer was immobilized on the surface of GE and AuNPs/GO. The label-free MCF-7 cells could be recognized by polydA-aptamer and self-assembled onto the surface of GE. The polydA-aptamer functionalized AuNPs/GO hybrid could further bind to MCF-7 cells to form a sandwich sensing system. Characterization of the surface modified GE was carried out by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) using Fe(CN)63-/4- as a redox probe. Under the optimized experimental conditions, a detection limit of 8 cellsmL-1 (3σ/slope) was obtained for MCF-7 cells by the present electrochemical biosensor, along with a linear range of 10-105 cellsmL-1. By virtue of excellent sensitivity, specificity and repeatability, the present electrochemical biosensor provides a potential application in point-of-care cancer diagnosis.
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Affiliation(s)
- Kun Wang
- Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, China
| | - Meng-Qi He
- Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, China
| | - Fu-Heng Zhai
- Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, China
| | - Rong-Huan He
- Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, China.
| | - Yong-Liang Yu
- Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, China.
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229
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Cheng K, Zhang J, Zhang L, Wang L, Chen H. Aptamer biosensor for Salmonella typhimurium detection based on luminescence energy transfer from Mn 2+-doped NaYF 4:Yb, Tm upconverting nanoparticles to gold nanorods. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 171:168-173. [PMID: 27526340 DOI: 10.1016/j.saa.2016.08.012] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2016] [Revised: 07/26/2016] [Accepted: 08/08/2016] [Indexed: 06/06/2023]
Abstract
A highly sensitive luminescent bioassay for the detection of Salmonella typhimurium was fabricated using Mn2+-doped NaYF4:Yb,Tm upconversion nanoparticles (UCNPs) as the donor and gold nanorods (Au NRs) as the acceptor and utilizing an energy transfer (LET) system. Mn2+-doped NaYF4:Yb,Tm UCNPs with a strong emission peak at 807nm were obtained by changing the doped ion ratio. Carboxyl-terminated Mn2+-doped NaYF4:Yb,Tm UCNPs were coupled with S. typhimurium aptamers, which were employed to capture and concentrate S. typhimurium. The electrostatic interactions shorten the distance between the negatively charged donor and the positively charged acceptor, which results in luminescence quenching. The added S. typhimurium leads to the restoration of luminescence due to the formation of UCNPs-aptamers-S. typhimurium, which repels the UCNPs-aptamers from the Au NRs. The LET system does not occur because of the nonexistence of the luminescence emission band of Mn2+-doped NaYF4:Yb,Tm UCNPs, which had large spectral overlap with the absorption band of Au NRs. Under optimal conditions, the linear range of detecting S. typhimurium was 12 to 5×105cfu/mL (R=0.99). The limit of detection for S. typhimurium was as low as 11cfu/mL in an aqueous buffer. The measurement of S. typhimurium in milk samples was satisfied in accordance with the plate-counting method, suggesting that the proposed method was of practical value in the application of food security.
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Affiliation(s)
- Keyi Cheng
- Anhui Key Laboratory of Chemo-Biosensing, Key Laboratory of Functional Molecular Solids, Ministry of Education, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, PR China
| | - Jianguo Zhang
- Anhui Key Laboratory of Chemo-Biosensing, Key Laboratory of Functional Molecular Solids, Ministry of Education, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, PR China
| | - Liping Zhang
- Anhui Key Laboratory of Chemo-Biosensing, Key Laboratory of Functional Molecular Solids, Ministry of Education, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, PR China
| | - Lun Wang
- Anhui Key Laboratory of Chemo-Biosensing, Key Laboratory of Functional Molecular Solids, Ministry of Education, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, PR China.
| | - Hongqi Chen
- Anhui Key Laboratory of Chemo-Biosensing, Key Laboratory of Functional Molecular Solids, Ministry of Education, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, PR China.
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230
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Hashkavayi AB, Raoof JB. Design an aptasensor based on structure-switching aptamer on dendritic gold nanostructures/Fe 3O 4@SiO 2/DABCO modified screen printed electrode for highly selective detection of epirubicin. Biosens Bioelectron 2017; 91:650-657. [PMID: 28110249 DOI: 10.1016/j.bios.2017.01.025] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2016] [Revised: 12/27/2016] [Accepted: 01/13/2017] [Indexed: 01/25/2023]
Abstract
The present work describes a label free electrochemical aptasensor for selective detection of epirubicin. In this project, 5'-thiole terminated aptamer was self-assembled on carbon screen printed electrode, which modified with electrodeposited gold nanoparticles on magnetic double-charged diazoniabicyclo [2.2.2] octane dichloride silica hybrid (Fe3O4@SiO2/DABCO) by Au-S bond. The interactions of epirubicin with aptamer on the AuNPs/Fe3O4@SiO2/DABCO/SPE have been studied by cyclic voltammetry, linear sweep voltammetry and electrochemical impedance spectroscopy. Under optimized conditions, the peak current of epirubicin increased linearly with increasing epirubicin concentration, due to the switching in the aptamer conformation and formation of aptamer- epirubicin complex instead of aptamer on the modified electrode surface. The Apt/AuNPs/Fe3O4@SiO2/DABCO/SPE is sensitive, selective and has two linear range from 0.07µM to 1.0µM and 1.0µM to 21.0µM with a detection limit of 0.04µM. The applicability of the aptasensor was successfully assessed by determination of epirubicin in a human blood serum sample.
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Affiliation(s)
- Ayemeh Bagheri Hashkavayi
- Electroanalytical Chemistry Research Laboratory, Department of Analytical Chemistry, Faculty of Chemistry, University of Mazandaran, Babolsar, Iran
| | - Jahan Bakhsh Raoof
- Electroanalytical Chemistry Research Laboratory, Department of Analytical Chemistry, Faculty of Chemistry, University of Mazandaran, Babolsar, Iran.
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231
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Nguyen VT, Kwon YS, Gu MB. Aptamer-based environmental biosensors for small molecule contaminants. Curr Opin Biotechnol 2017; 45:15-23. [PMID: 28088092 DOI: 10.1016/j.copbio.2016.11.020] [Citation(s) in RCA: 108] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Accepted: 11/14/2016] [Indexed: 12/26/2022]
Abstract
Aptasensors are promising biosensors, which take advantage of using aptamers as a recognition element. The combination of the excellent characteristics of aptamers and the leading detection platform techniques, such as optical, electrochemical with nanomaterial-integrated, or mass-sensitive techniques with high sensitivity and specificity draws a promising view for the application of the aptasensors for the detection of harmful small toxic chemicals and real-time monitoring in the environments. In spite of attraction of aptasensors, application of them is limited to the complex environment due to the facts that how the immobilization of aptamers onto the surface affects the functions of aptamers and their structures for the detection of environmental contaminants are not clearly known. This review examines the most recent update on the selection of aptamers for small molecules, the development and application of aptasensors in the detection of small molecule contaminants in environment. Additionally, their applications to the real samples as environmental monitoring reported in the publications also are reviewed.
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Affiliation(s)
- Van-Thuan Nguyen
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Anam-dong, Seongbuk-gu, Seoul 136-713, South Korea
| | - Young Seop Kwon
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Anam-dong, Seongbuk-gu, Seoul 136-713, South Korea
| | - Man Bock Gu
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Anam-dong, Seongbuk-gu, Seoul 136-713, South Korea.
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232
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Tan J, Hao B, Liu Z, Bai F, Yang R, Hao H. Modification and characterization of an aptamer-based surface plasmon resonance sensor chip. BIO WEB OF CONFERENCES 2017. [DOI: 10.1051/bioconf/20170803011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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233
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Pei Q, Wang Y, Liu S, Qin Y, Leng X, Cui X, Huang J. Exonuclease III-aided autonomous cascade signal amplification: a facile and universal DNA biosensing platform for ultrasensitive electrochemical detection of S. typhimurium. NEW J CHEM 2017. [DOI: 10.1039/c7nj01626c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A novel electrochemical biosensor based on exonuclease III-aided autonomous cascade signal amplification for the ultrasensitive and highly specific detection of S. typhimurium.
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Affiliation(s)
- Qianqian Pei
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- P. R. China
| | - Yu Wang
- School of Biological Sciences and Technology
- University of Jinan
- Jinan 250022
- P. R. China
| | - Su Liu
- School of Resources and Environment
- University of Jinan
- Jinan 250022
- P. R. China
| | - Yifei Qin
- School of Resources and Environment
- University of Jinan
- Jinan 250022
- P. R. China
| | - Xueqi Leng
- School of Resources and Environment
- University of Jinan
- Jinan 250022
- P. R. China
| | - Xuejun Cui
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- P. R. China
| | - Jiadong Huang
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- P. R. China
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234
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Ma X, Song L, Zhou N, Xia Y, Wang Z. A novel aptasensor for the colorimetric detection of S. typhimurium based on gold nanoparticles. Int J Food Microbiol 2016; 245:1-5. [PMID: 28107686 DOI: 10.1016/j.ijfoodmicro.2016.12.024] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2016] [Revised: 12/28/2016] [Accepted: 12/29/2016] [Indexed: 01/18/2023]
Abstract
A simple, fast and convenient colorimetric aptasensor was fabricated for the detection of Salmonella typhimurium (S. typhimurium) which was based on the color change effect of gold nanoparticles (GNPs). S. typhimurium is one of the most common causes of food-associated disease. Aptamers with specific recognition toward S. typhimurium was modified to the surface of prepared GNPs. They play a role for the protection of GNPs from aggregation toward high concentrations of NaCl. With the addition of S. typhimurium, aptamers preferably combined to S. typhimurium and the protection effect was broken. With more S. typhimurium, more aptamers detached from GNPs. In such a situation, the exposed GNPs would aggregated to some extent with the addition of NaCl. The color changed from red, purple to blue which could be characterized by UV-Vis spectrophotometer. The absorbance spectra of GNPs redshifted constantly and the intensity ratio of A700/A521 changed regularly. This could be calculated for the basis of quantitative detection of S. typhimurium from 102cfu/mL to 107cfu/mL. The obtained linear correlation equation was y=0.1946x-0.2800 (R2=0.9939) with a detection limit as low as 56cfu/mL. This method is simple and rapid, results in high sensitivity and specificity, and can be used to detect actual samples.
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Affiliation(s)
- Xiaoyuan Ma
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China; Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi 214122, PR China
| | - Liangjing Song
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China
| | - Nixin Zhou
- Department of Health Management and Basic Education, Jiangsu Jiankang Vocational College, Nanjing 211800, PR China
| | - Yu Xia
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China; Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi 214122, PR China
| | - Zhouping Wang
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China; Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi 214122, PR China.
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235
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A novel colorimetric competitive aptamer assay for lysozyme detection based on superparamagnetic nanobeads. Talanta 2016; 165:436-441. [PMID: 28153279 DOI: 10.1016/j.talanta.2016.12.083] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2016] [Revised: 12/27/2016] [Accepted: 12/29/2016] [Indexed: 11/21/2022]
Abstract
Lysozyme (Lys) commonly presents in wines and are known to cause toxicological impact on human health. The need of highly sensitive and reliable detection methods are evident in such matrix. In this work, we developed a competitive aptamer based assay for detection of Lys by employing carboxylated magnetic beads as a support to immobilize the target molecule Lys. The used aptamer sequence was biotinylated which further binds with Streptavidin-Alkaline phosphatase (Stp-ALP) in the micro wells. Colorimetric tests were performed in order to optimize different experimental parameters. The Lys assay showed a good linearity in the range of 5-140nM with a limit of detection (LOD) 10nM. The mid-point value (IC50) 110nM and the analysis time (60min) validated the developed aptasensor as a promising tool for routine use. The assay displayed good recoveries of Lys in the range 99.00-99.27% and was demonstrated for the detection of Lys in wine samples.
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236
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Arimoto S, Shimono K, Yasukawa T, Mizutani F, Yoshioka T. Improvement of Electrochemical Response of Cocaine Sensors Based on DNA Aptamer by Heat Treatment. ANAL SCI 2016; 32:469-72. [PMID: 27063722 DOI: 10.2116/analsci.32.469] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
We report on a biosensor for cocaine based on the conformation change of DNA aptamer by capturing the cocaine molecules. The oxidation current of ferrocene conjugated on the terminal end of aptamer immobilized on an Au electrode increased with increasing cocaine concentration. The sensor response has been improved by a simple heat treatment after immobilization, since the aggregates of DNA aptamer generated during the immobilization step could be dissociated and rearranged on the electrode.
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Affiliation(s)
- Satoshi Arimoto
- Advanced Research Division, Bio Research Department, Panasonic Corporation
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237
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Rhouati A, Catanante G, Nunes G, Hayat A, Marty JL. Label-Free Aptasensors for the Detection of Mycotoxins. SENSORS 2016; 16:s16122178. [PMID: 27999353 PMCID: PMC5191157 DOI: 10.3390/s16122178] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Revised: 12/08/2016] [Accepted: 12/14/2016] [Indexed: 01/13/2023]
Abstract
Various methodologies have been reported in the literature for the qualitative and quantitative monitoring of mycotoxins in food and feed samples. Based on their enhanced specificity, selectivity and versatility, bio-affinity assays have inspired many researchers to develop sensors by exploring bio-recognition phenomena. However, a significant problem in the fabrication of these devices is that most of the biomolecules do not generate an easily measurable signal upon binding to the target analytes, and signal-generating labels are required to perform the measurements. In this context, aptamers have been emerged as a potential and attractive bio-recognition element to design label-free aptasensors for various target analytes. Contrary to other bioreceptor-based approaches, the aptamer-based assays rely on antigen binding-induced conformational changes or oligomerization states rather than binding-assisted changes in adsorbed mass or charge. This review will focus on current designs in label-free conformational switchable design strategies, with a particular focus on applications in the detection of mycotoxins.
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Affiliation(s)
- Amina Rhouati
- BAE Laboratory, Université de Perpignan Via Domitia, 52 Avenue Paul Alduy, Perpignan 66860, France.
- Ecole Nationale Supérieure de Biotechnologie, Constantine 25100, Algeria.
| | - Gaelle Catanante
- BAE Laboratory, Université de Perpignan Via Domitia, 52 Avenue Paul Alduy, Perpignan 66860, France.
| | - Gilvanda Nunes
- Technological Chemistry Department, Federal University of Maranhão, CCET/UFMA, Av. Portugueses, Cidade Universitária do Canga, 65080-040 São Luis, Brazil.
| | - Akhtar Hayat
- BAE Laboratory, Université de Perpignan Via Domitia, 52 Avenue Paul Alduy, Perpignan 66860, France.
- Interdisciplinary Research Centre in Biomedical Materials (IRCBM) COMSATS Institute of Information Technology (CIIT), Lahore 54000, Pakistan.
| | - Jean-Louis Marty
- BAE Laboratory, Université de Perpignan Via Domitia, 52 Avenue Paul Alduy, Perpignan 66860, France.
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238
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Ko HJ, Park TH. Bioelectronic nose and its application to smell visualization. J Biol Eng 2016; 10:17. [PMID: 27999616 PMCID: PMC5154139 DOI: 10.1186/s13036-016-0041-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Accepted: 12/05/2016] [Indexed: 11/10/2022] Open
Abstract
There have been many trials to visualize smell using various techniques in order to objectively express the smell because information obtained from the sense of smell in human is very subjective. So far, well-trained experts such as a perfumer, complex and large-scale equipment such as GC-MS, and an electronic nose have played major roles in objectively detecting and recognizing odors. Recently, an optoelectronic nose was developed to achieve this purpose, but some limitations regarding the sensitivity and the number of smells that can be visualized still persist. Since the elucidation of the olfactory mechanism, numerous researches have been accomplished for the development of a sensing device by mimicking human olfactory system. Engineered olfactory cells were constructed to mimic the human olfactory system, and the use of engineered olfactory cells for smell visualization has been attempted with the use of various methods such as calcium imaging, CRE reporter assay, BRET, and membrane potential assay; however, it is not easy to consistently control the condition of cells and it is impossible to detect low odorant concentration. Recently, the bioelectronic nose was developed, and much improved along with the improvement of nano-biotechnology. The bioelectronic nose consists of the following two parts: primary transducer and secondary transducer. Biological materials as a primary transducer improved the selectivity of the sensor, and nanomaterials as a secondary transducer increased the sensitivity. Especially, the bioelectronic noses using various nanomaterials combined with human olfactory receptors or nanovesicles derived from engineered olfactory cells have a potential which can detect almost all of the smells recognized by human because an engineered olfactory cell might be able to express any human olfactory receptor as well as can mimic human olfactory system. Therefore, bioelectronic nose will be a potent tool for smell visualization, but only if two technologies are completed. First, a multi-channel array-sensing system has to be applied for the integration of all of the olfactory receptors into a single chip for mimicking the performance of human nose. Second, the processing technique of the multi-channel system signals should be simultaneously established with the conversion of the signals to visual images. With the use of this latest sensing technology, the realization of a proper smell-visualization technology is expected in the near future.
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Affiliation(s)
- Hwi Jin Ko
- Bio-MAX Institute, Seoul, 151-742 Republic of Korea
| | - Tai Hyun Park
- Bio-MAX Institute, Seoul, 151-742 Republic of Korea ; School of Chemical and Biological Engineering, Seoul National University, Seoul, 151-742 Republic of Korea ; Advanced Institutes of Convergence Technology, Suwon, Gyeonggido 443-270 Republic of Korea
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239
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Fischer C, Kallinich C, Klockmann S, Schrader J, Fischer M. Automated Enrichment of Sulfanilamide in Milk Matrices by Utilization of Aptamer-Linked Magnetic Particles. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2016; 64:9246-9252. [PMID: 27933990 DOI: 10.1021/acs.jafc.6b04435] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The present work demonstrates the first automated enrichment approach for antibiotics in milk using specific DNA aptamers. First, aptamers toward the antibiotic sulfanilamide were selected and characterized regarding their dissociation constants and specificity toward relevant antibiotics via fluorescence assay and LC-MS/MS detection. The performed enrichment was automated using the KingFisherDuo and compared to a manual approach. Verifying the functionality, trapping was realized in different milk matrices: (i) 0.3% fat milk, (ii) 1.5% fat milk, (iii) 3.5% fat milk, and (iv) 0.3% fat cocoa milk drink. Enrichment factors up to 8-fold could be achieved. Furthermore, it could be shown that novel implementation of a magnetic separator increases the reproducibility and reduces the hands-on time from approximately half a day to 30 min.
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Affiliation(s)
- Christin Fischer
- Hamburg School of Food Science; Institute of Food Chemistry, University of Hamburg , Grindelallee 117, 20146 Hamburg, Germany
| | - Constanze Kallinich
- Hamburg School of Food Science; Institute of Food Chemistry, University of Hamburg , Grindelallee 117, 20146 Hamburg, Germany
| | - Sven Klockmann
- Hamburg School of Food Science; Institute of Food Chemistry, University of Hamburg , Grindelallee 117, 20146 Hamburg, Germany
| | - Jil Schrader
- Hamburg School of Food Science; Institute of Food Chemistry, University of Hamburg , Grindelallee 117, 20146 Hamburg, Germany
| | - Markus Fischer
- Hamburg School of Food Science; Institute of Food Chemistry, University of Hamburg , Grindelallee 117, 20146 Hamburg, Germany
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240
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Mariani S, Pino L, Strambini LM, Tedeschi L, Barillaro G. 10 000-Fold Improvement in Protein Detection Using Nanostructured Porous Silicon Interferometric Aptasensors. ACS Sens 2016. [DOI: 10.1021/acssensors.6b00634] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Stefano Mariani
- Dipartimento
di Ingegneria dell’Informazione, Università di Pisa, via G. Caruso 16, 56122 Pisa, Italy
| | - Laura Pino
- Istituto
di Fisiologia Clinica, Consiglio Nazionale delle Ricerche, via G.
Moruzzi 1, 56124 Pisa, Italy
| | - Lucanos M. Strambini
- Dipartimento
di Ingegneria dell’Informazione, Università di Pisa, via G. Caruso 16, 56122 Pisa, Italy
| | - Lorena Tedeschi
- Dipartimento
di Ingegneria dell’Informazione, Università di Pisa, via G. Caruso 16, 56122 Pisa, Italy
| | - Giuseppe Barillaro
- Dipartimento
di Ingegneria dell’Informazione, Università di Pisa, via G. Caruso 16, 56122 Pisa, Italy
- Istituto
di Fisiologia Clinica, Consiglio Nazionale delle Ricerche, via G.
Moruzzi 1, 56124 Pisa, Italy
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241
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Hu J, Ye M, Zhou Z. Aptamers: novel diagnostic and therapeutic tools for diabetes mellitus and metabolic diseases. J Mol Med (Berl) 2016; 95:249-256. [PMID: 27847965 DOI: 10.1007/s00109-016-1485-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Revised: 10/24/2016] [Accepted: 11/01/2016] [Indexed: 02/08/2023]
Abstract
Diabetes mellitus is one of the most common chronic diseases that threatens human health in worldwide populations. Despite enormous efforts invested in the study of diabetes mellitus, the development of precise diagnoses and treatments for this disease remains difficult due to the limitations of current techniques. Therefore, new methods are currently being developed. Aptamers are oligonucleotides that bind to specific target molecules and have been widely applied as diagnostic and therapeutic tools. In recent years, aptamers have been utilized in the study of diabetes mellitus and metabolic diseases. In this review, we highlight recent developments and new perspectives on aptamers in the field of diabetes mellitus and other metabolic diseases. Aptamers could potentially provide the means for efficient diagnoses and therapies against diabetes mellitus.
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Affiliation(s)
- Jingping Hu
- Department of Metabolism & Endocrinology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, 410011, China.,Key Laboratory of Diabetes Immunology (Central South University), Ministry of Education; National Clinical Research Center for Metabolic Diseases, Changsha, Hunan, 410011, China
| | - Mao Ye
- Molecular Science & Biomedicine Laboratory; State Key Laboratory of Chemo/Biosensing & Chemometrics, College of Chemistry & Chemical Engineering; College of Biology, Collaborative Innovation Center for Molecular Engineering for Theranostics, Hunan University, Changsha, Hunan, 410082, China
| | - Zhiguang Zhou
- Department of Metabolism & Endocrinology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, 410011, China. .,Key Laboratory of Diabetes Immunology (Central South University), Ministry of Education; National Clinical Research Center for Metabolic Diseases, Changsha, Hunan, 410011, China.
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242
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Derikvand H, Roushani M, Abbasi AR, Derikvand Z, Azadbakht A. Design of folding-based impedimetric aptasensor for determination of the nonsteroidal anti-inflammatory drug. Anal Biochem 2016; 513:77-86. [DOI: 10.1016/j.ab.2016.06.013] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2016] [Revised: 06/07/2016] [Accepted: 06/08/2016] [Indexed: 11/24/2022]
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243
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Shukla S, Hong SY, Chung SH, Kim M. Rapid Detection Strategies for the Global Threat of Zika Virus: Current State, New Hypotheses, and Limitations. Front Microbiol 2016; 7:1685. [PMID: 27822207 PMCID: PMC5075579 DOI: 10.3389/fmicb.2016.01685] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2016] [Accepted: 10/07/2016] [Indexed: 11/13/2022] Open
Abstract
The current scenario regarding the widespread Zika virus (ZIKV) has resulted in numerous diagnostic studies, specifically in South America and in locations where there is frequent entry of travelers returning from ZIKV-affected areas, including pregnant women with or without clinical symptoms of ZIKV infection. The World Health Organization, WHO, announced that millions of cases of ZIKV are likely to occur in the USA in the near future. This situation has created an alarming public health emergency of international concern requiring the detection of this life-threatening viral candidate due to increased cases of newborn microcephaly associated with ZIKV infection. Hence, this review reports possible methods and strategies for the fast and reliable detection of ZIKV with particular emphasis on current updates, knowledge, and new hypotheses that might be helpful for medical professionals in poor and developing countries that urgently need to address this problem. In particular, we emphasize liposome-based biosensors. Although these biosensors are currently among the less popular tools for human disease detection, they have become useful tools for the screening and detection of pathogenic bacteria, fungi, and viruses because of their versatile advantageous features compared to other sensing devices. This review summarizes the currently available methods employed for the rapid detection of ZIKV and suggests an innovative approach involving the application of a liposome-based hypothesis for the development of new strategies for ZIKV detection and their use as effective biomedicinal tools.
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Affiliation(s)
- Shruti Shukla
- Department of Food Science and Technology, Yeungnam University Gyeongsan-si, South Korea
| | - Sung-Yong Hong
- School of Biosystem and Biomedical Science, College of Health Sciences, Korea University Seoul, South Korea
| | - Soo Hyun Chung
- School of Biosystem and Biomedical Science, College of Health Sciences, Korea University Seoul, South Korea
| | - Myunghee Kim
- Department of Food Science and Technology, Yeungnam University Gyeongsan-si, South Korea
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244
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Hashkavayi AB, Raoof JB, Ojani R, Kavoosian S. Ultrasensitive electrochemical aptasensor based on sandwich architecture for selective label-free detection of colorectal cancer (CT26) cells. Biosens Bioelectron 2016; 92:630-637. [PMID: 27829554 DOI: 10.1016/j.bios.2016.10.042] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Revised: 09/29/2016] [Accepted: 10/18/2016] [Indexed: 01/10/2023]
Abstract
Colorectal cancer is one of the most common cancers in the world and has no effective treatment. Therefore, development of new methods for early diagnosis is instantly required. Biological recognition probes such as synthetic receptor and aptamer is one of the candidate recognition layers to detect important biomolecules. In this work, an electrochemical aptasensor was developed by fabricating an aptamer-cell-aptamer sandwich architecture on an SBA-15-3-aminopropyltriethoxysilane (SBA-15-pr-NH2) and Au nanoparticles (AuNPs) modified graphite screen printed electrode (GSPE) surface for the selective, label-free detection of CT26 cancer cells. Based on the incubation of the thiolated aptamer with CT26 cells, the electron-transfer resistance of Fe (CN)63-/4- redox couple increased considerably on the aptasensor surface. The results obtained from cyclic voltammetry and electrochemical impedance spectroscopy studies showed that the fabricated aptasensor can specifically identify CT26 cells in the concentration ranges of 10-1.0×105cells/mL and 1.0×105-6.0×106 cells/mL, respectively, with a detection limit of 2cells/mL. Applying the thiol terminated aptamer (5TR1) as a recognition layer led to a sensor with high affinity for CT26 cancer cells, compared to control cancer cells of AGS cells, VERO Cells, PC3 cells and SKOV-3 cells. Therefore a simple, rapid, label free, inexpensive, excellent, sensitive and selective electrochemical aptasensor based on sandwich architecture was developed for detection of CT26 Cells.
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Affiliation(s)
- Ayemeh Bagheri Hashkavayi
- Electroanalytical Chemistry Research Laboratory, Department of Analytical Chemistry, Faculty of Chemistry, University of Mazandaran, Babolsar, Iran
| | - Jahan Bakhsh Raoof
- Electroanalytical Chemistry Research Laboratory, Department of Analytical Chemistry, Faculty of Chemistry, University of Mazandaran, Babolsar, Iran.
| | - Reza Ojani
- Electroanalytical Chemistry Research Laboratory, Department of Analytical Chemistry, Faculty of Chemistry, University of Mazandaran, Babolsar, Iran
| | - Saeid Kavoosian
- North Research Center, Pasteur Institute of Iran, Amol, Iran
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245
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Bahrami S, Abbasi AR, Roushani M, Derikvand Z, Azadbakht A. An electrochemical dopamine aptasensor incorporating silver nanoparticle, functionalized carbon nanotubes and graphene oxide for signal amplification. Talanta 2016; 159:307-316. [DOI: 10.1016/j.talanta.2016.05.060] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Revised: 05/21/2016] [Accepted: 05/24/2016] [Indexed: 10/21/2022]
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Paniel N, Istamboulié G, Triki A, Lozano C, Barthelmebs L, Noguer T. Selection of DNA aptamers against penicillin G using Capture-SELEX for the development of an impedimetric sensor. Talanta 2016; 162:232-240. [PMID: 27837823 DOI: 10.1016/j.talanta.2016.09.058] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Revised: 09/23/2016] [Accepted: 09/24/2016] [Indexed: 01/15/2023]
Abstract
This paper describes for the first time the selection of aptamers selective to penicillin. Aptamers were selected using a specific process called Capture-SELEX (Systematic Evolution of Ligands by Exponential Enrichment). This technique is based on the selection of DNA aptamers using penicillin G in solution while the ssDNA library is fixed on a support. One aptamer showing a good affinity to penicillin was finally selected and tested in electrochemical sensor configuration, using electrochemical impedance spectroscopy as detection technique. The developed aptasensor allowed the detection of penicillin in a wide concentration range, comprised between 0.4 and 1000µgL-1 Such performance was compatible with milk analysis, as the maximum residue limit tolerated in this matrix is 4µgL-1. The selectivity of the developed sensor was also studied, showing that the sensor was also able to bind other beta-lactam antibiotics, although with a weaker affinity. Finally the sensor was used for detection of penicillin G in milk. It was shown that a simple sample treatment with isopropanol followed by filtration was sufficient to eliminate matrix effects, allowing the determination of penicillin in milk at concentrations compatible with legislation requirements.
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Affiliation(s)
- Nathalie Paniel
- Laboratoire BAE, Université de Perpignan Via Domitia, 52 Avenue Paul Alduy, 66860 Perpignan Cedex 9, France
| | - Georges Istamboulié
- Laboratoire BAE, Université de Perpignan Via Domitia, 52 Avenue Paul Alduy, 66860 Perpignan Cedex 9, France
| | - Athar Triki
- Laboratoire BAE, Université de Perpignan Via Domitia, 52 Avenue Paul Alduy, 66860 Perpignan Cedex 9, France
| | - Clément Lozano
- Laboratoire BAE, Université de Perpignan Via Domitia, 52 Avenue Paul Alduy, 66860 Perpignan Cedex 9, France
| | - Lise Barthelmebs
- Laboratoire BAE, Université de Perpignan Via Domitia, 52 Avenue Paul Alduy, 66860 Perpignan Cedex 9, France
| | - Thierry Noguer
- Laboratoire BAE, Université de Perpignan Via Domitia, 52 Avenue Paul Alduy, 66860 Perpignan Cedex 9, France.
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247
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Li S, Wu X, Liu C, Yin G, Luo J, Xu Z. Application of DNA aptamers as sensing layers for detection of carbofuran by electrogenerated chemiluminescence energy transfer. Anal Chim Acta 2016; 941:94-100. [PMID: 27692383 DOI: 10.1016/j.aca.2016.08.038] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Revised: 08/20/2016] [Accepted: 08/24/2016] [Indexed: 11/19/2022]
Abstract
In this study, an electrogenerated chemiluminescence (ECL) sensing platform for carbofuran detection was constructed based on ECL energy transfer (ECRET) and carbon dot (C-dot)-tagged aptamers as the recognition element. Fullerene (C60)-loaded gold nanoparticles (C60-Au) were used as the energy donor, modified on a glassy carbon electrode. C-dot-tagged DNA aptamers were used as the receptor, and ECRET then occurred between C60-Au and C-dots. After accepting the energy, the C-dots acted as a signal indicator and showed decreased signal intensity in the presence of targets, which competitively bound to DNA aptamers and blocked energy transfer. Using this robust, straight-forward strategy, the sensor showed a linear ECL response to carbofuran at concentrations from 2.0 × 10-11 mol L-1 to 8.0 × 10-9 mol L-1. The detection limit of this assay was shown to be 8.8 × 10-13 mol L-1. Thus, the sensing approach described in this study could be adapted for use in the detection of various pesticide residue targets.
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Affiliation(s)
- Shuhuai Li
- Analysis and Test Center of Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, China; Laboratory of Quality & Safety Risk Assessment for Tropical Products (Haikou) Ministry of Agriculture, Haikou, 571101, China.
| | - Xuejin Wu
- Analysis and Test Center of Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, China; Laboratory of Quality & Safety Risk Assessment for Tropical Products (Haikou) Ministry of Agriculture, Haikou, 571101, China
| | - Chunhua Liu
- Analysis and Test Center of Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, China; Laboratory of Quality & Safety Risk Assessment for Tropical Products (Haikou) Ministry of Agriculture, Haikou, 571101, China
| | - Guihao Yin
- Analysis and Test Center of Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, China; Laboratory of Quality & Safety Risk Assessment for Tropical Products (Haikou) Ministry of Agriculture, Haikou, 571101, China
| | - Jinhui Luo
- Analysis and Test Center of Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, China; Laboratory of Quality & Safety Risk Assessment for Tropical Products (Haikou) Ministry of Agriculture, Haikou, 571101, China
| | - Zhi Xu
- Analysis and Test Center of Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, China; Laboratory of Quality & Safety Risk Assessment for Tropical Products (Haikou) Ministry of Agriculture, Haikou, 571101, China.
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248
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A simple and label-free aptasensor based on amino group-functionalized gold nanocomposites-Prussian blue/carbon nanotubes as labels for signal amplification. J Electroanal Chem (Lausanne) 2016. [DOI: 10.1016/j.jelechem.2016.07.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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249
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Selective tools for the solid-phase extraction of Ochratoxin A from various complex samples: immunosorbents, oligosorbents, and molecularly imprinted polymers. Anal Bioanal Chem 2016; 408:6983-99. [PMID: 27585915 DOI: 10.1007/s00216-016-9886-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Revised: 06/21/2016] [Accepted: 08/16/2016] [Indexed: 12/27/2022]
Abstract
The evolution of instrumentation in terms of separation and detection has allowed a real improvement of the sensitivity and the analysis time. However, the analysis of ultra-traces of toxins such as ochratoxin A (OTA) from complex samples (foodstuffs, biological fluids…) still requires a step of purification and of preconcentration before chromatographic determination. In this context, extraction sorbents leading to a molecular recognition mechanism appear as powerful tools for the selective extraction of OTA and of its structural analogs in order to obtain more reliable and sensitive quantitative analyses of these compounds in complex media. Indeed, immunosorbents and oligosorbents that are based on the use of immobilized antibodies and of aptamers, respectively, and that are specific to OTA allow its selective clean-up from complex samples with high enrichment factors. Similar molecular recognition mechanisms can also be obtained by developing molecularly imprinted polymers, the synthesis of which leads to the formation of cavities that are specific to OTA, thus mimicking the recognition site of the biomolecules. Therefore, the principle, the advantages, the limits of these different types of extraction tools, and their complementary behaviors will be presented. The introduction of these selective tools in miniaturized devices will also be discussed.
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250
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Aptamers in hematological malignancies and their potential therapeutic implications. Crit Rev Oncol Hematol 2016; 106:108-17. [PMID: 27637356 DOI: 10.1016/j.critrevonc.2016.08.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Revised: 06/06/2016] [Accepted: 08/09/2016] [Indexed: 02/07/2023] Open
Abstract
Aptamers are short DNA/RNA oligonucleotides selected by the process called Systematic Evolution of Ligands by Exponential Enrichment (SELEX). Due to their functional similarity to monoclonal antibodies with some superior characters, such as high specificity and affinity, flexible modification and stability, and lack of toxicity and immunogenicity, they are promising alternative and complementary targeted therapy for hematologic malignancies. The trends in aptamer technology including production, selection, modifications are briefly discussed in this review. The key aspect is to illustrate aptamers against cancer cells in hematologic malignancies especially those that have entered clinical trials. We also discuss some challenges remain in the application of aptamers.
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