151
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Álvarez-Martos I, Møller A, Ferapontova EE. Dopamine Binding and Analysis in Undiluted Human Serum and Blood by the RNA-Aptamer Electrode. ACS Chem Neurosci 2019; 10:1706-1715. [PMID: 30605601 DOI: 10.1021/acschemneuro.8b00616] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Specific analysis of such neurotransmitters as dopamine by the aptamer electrodes in biological fluids is detrimentally affected by nonspecific adsorption of media, particularly pronounced at positive charges of the electrode surface at which dopamine oxidizes. Here, we show that dopamine analysis at the RNA-aptamer/cysteamine-modified electrodes is strongly inhibited in undiluted human serum and blood due to nonspecific interfacial adsorption of serum and blood components. We demonstrate that nonspecific adsorption of serum proteins (but not of blood components) could be minimized when analysis is performed in a flow and injections of serum samples are followed by washing steps in a phosphate buffer solution (PBS) carrier. Under those conditions, the dopamine-aptamer binding affinity in whole human serum of (1.9 ± 0.3) × 104 M-1 s-1 was comparable to the (3.7 ± 0.3) × 104 M-1 s-1 found in PBS, and the dopamine oxidation signal linearly depended on the dopamine concentration, providing a sensitivity of analysis of 73 ± 3 nA μM-1 cm-2 and a LOD of 114 ± 8 nM. The flow-injection apatmer-electrode system was used for direct analysis of basal levels of dopamine in undiluted human serum samples, without using any physical separators (membranes) or filtration procedures. The results suggest a simple strategy for combatting biosurface fouling, otherwise most pronounced at positive electrode potentials used for dopamine detection, and assist in designing more efficient antifouling strategies for biomedical applications.
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Affiliation(s)
- Isabel Álvarez-Martos
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, DK-8000 Aarhus C, Denmark
| | - Arne Møller
- PET-Centre, Aarhus University Hospital, Aarhus, Denmark
- Center of Functionally Integrative Neuroscience, Aarhus University, Aarhus, Denmark
| | - Elena E. Ferapontova
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, DK-8000 Aarhus C, Denmark
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152
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Munzar JD, Ng A, Juncker D. Duplexed aptamers: history, design, theory, and application to biosensing. Chem Soc Rev 2019; 48:1390-1419. [PMID: 30707214 DOI: 10.1039/c8cs00880a] [Citation(s) in RCA: 121] [Impact Index Per Article: 24.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Nucleic acid aptamers are single stranded DNA or RNA sequences that specifically bind a cognate ligand. In addition to their widespread use as stand-alone affinity binding reagents in analytical chemistry, aptamers have been engineered into a variety of ligand-specific biosensors, termed aptasensors. One of the most common aptasensor formats is the duplexed aptamer (DA). As defined herein, DAs are aptasensors containing two nucleic acid elements coupled via Watson-Crick base pairing: (i) an aptamer sequence, which serves as a ligand-specific receptor, and (ii) an aptamer-complementary element (ACE), such as a short DNA oligonucleotide, which is designed to hybridize to the aptamer. The ACE competes with ligand binding, such that DAs generate a signal upon ligand-dependent ACE-aptamer dehybridization. DAs possess intrinsic advantages over other aptasensor designs. For example, DA biosensing designs generalize across DNA and RNA aptamers, DAs are compatible with many readout methods, and DAs are inherently tunable on the basis of nucleic acid hybridization. However, despite their utility and popularity, DAs have not been well defined in the literature, leading to confusion over the differences between DAs and other aptasensor formats. In this review, we introduce a framework for DAs based on ACEs, and use this framework to distinguish DAs from other aptasensor formats and to categorize cis- and trans-DA designs. We then explore the ligand binding dynamics and chemical properties that underpin DA systems, which fall under conformational selection and induced fit models, and which mirror classical SN1 and SN2 models of nucleophilic substitution reactions. We further review a variety of in vitro and in vivo applications of DAs in the chemical and biological sciences, including riboswitches and riboregulators. Finally, we present future directions of DAs as ligand-responsive nucleic acids. Owing to their tractability, versatility and ease of engineering, DA biosensors bear a great potential for the development of new applications and technologies in fields ranging from analytical chemistry and mechanistic modeling to medicine and synthetic biology.
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Affiliation(s)
- Jeffrey D Munzar
- McGill University and Genome Quebec Innovation Centre, Montreal, Quebec, Canada.
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153
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Liang S, Kinghorn AB, Voliotis M, Prague JK, Veldhuis JD, Tsaneva-Atanasova K, McArdle CA, Li RHW, Cass AEG, Dhillo WS, Tanner JA. Measuring luteinising hormone pulsatility with a robotic aptamer-enabled electrochemical reader. Nat Commun 2019; 10:852. [PMID: 30787284 PMCID: PMC6382769 DOI: 10.1038/s41467-019-08799-6] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Accepted: 01/28/2019] [Indexed: 11/23/2022] Open
Abstract
Normal reproductive functioning is critically dependent on pulsatile secretion of luteinising hormone (LH). Assessment of LH pulsatility is important for the clinical diagnosis of reproductive disorders, but current methods are hampered by frequent blood sampling coupled to expensive serial immunochemical analysis. Here, we report the development and application of a Robotic APTamer-enabled Electrochemical Reader (RAPTER) electrochemical analysis system to determine LH pulsatility. Through selective evolution of ligands by exponential enrichment (SELEX), we identify DNA aptamers that bind specifically to LH and not to related hormones. The aptamers are integrated into electrochemical aptamer-based (E-AB) sensors on a robotic platform. E-AB enables rapid, sensitive and repeatable determination of LH concentration profiles. Bayesian Spectrum Analysis is applied to determine LH pulsatility in three distinct patient cohorts. This technology has the potential to transform the clinical care of patients with reproductive disorders and could be developed to allow real-time in vivo hormone monitoring.
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Affiliation(s)
- Shaolin Liang
- School of Biomedical Sciences, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong, China
- Section of Endocrinology and Investigative Medicine, Imperial College London, London, SW7 2AZ, UK
- Department of Chemistry, Imperial College London, London, SW7 2AZ, UK
| | - Andrew B Kinghorn
- School of Biomedical Sciences, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Margaritis Voliotis
- Department of Mathematics and Living Systems Institute, College of Engineering, Mathematics, and Physical Sciences, University of Exeter, Exeter, EX4 4QD, UK
| | - Julia K Prague
- Section of Endocrinology and Investigative Medicine, Imperial College London, London, SW7 2AZ, UK
| | - Johannes D Veldhuis
- Endocrine Research Unit, Mayo School of Graduate Medical Education, Mayo Clinic, Rochester, MN 55905, MN, USA
| | - Krasimira Tsaneva-Atanasova
- Department of Mathematics and Living Systems Institute, College of Engineering, Mathematics, and Physical Sciences, University of Exeter, Exeter, EX4 4QD, UK
| | - Craig A McArdle
- Laboratories for Integrative Neuroscience and Endocrinology, Bristol Medical School, University of Bristol, Bristol, BS1 3NY, UK
| | - Raymond H W Li
- Department of Obstetrics and Gynaecology, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Anthony E G Cass
- Department of Chemistry, Imperial College London, London, SW7 2AZ, UK.
| | - Waljit S Dhillo
- Section of Endocrinology and Investigative Medicine, Imperial College London, London, SW7 2AZ, UK.
| | - Julian A Tanner
- School of Biomedical Sciences, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong, China.
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154
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Ganzer PD, Sharma G. Opportunities and challenges for developing closed-loop bioelectronic medicines. Neural Regen Res 2019; 14:46-50. [PMID: 30531069 PMCID: PMC6262994 DOI: 10.4103/1673-5374.243697] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
The peripheral nervous system plays a major role in the maintenance of our physiology. Several peripheral nerves intimately regulate the state of the brain, spinal cord, and visceral systems. A new class of therapeutics, called bioelectronic medicines, are being developed to precisely regulate physiology and treat dysfunction using peripheral nerve stimulation. In this review, we first discuss new work using closed-loop bioelectronic medicine to treat upper limb paralysis. In contrast to open-loop bioelectronic medicines, closed-loop approaches trigger ‘on demand’ peripheral nerve stimulation due to a change in function (e.g., during an upper limb movement or a change in cardiopulmonary state). We also outline our perspective on timing rules for closed-loop bioelectronic stimulation, interface features for non-invasively stimulating peripheral nerves, and machine learning algorithms to recognize disease events for closed-loop stimulation control. Although there will be several challenges for this emerging field, we look forward to future bioelectronic medicines that can autonomously sense changes in the body, to provide closed-loop peripheral nerve stimulation and treat disease.
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Affiliation(s)
- Patrick D Ganzer
- Medical Devices and Neuromodulation, Battelle Memorial Institute, Columbus, OH, USA
| | - Gaurav Sharma
- Medical Devices and Neuromodulation, Battelle Memorial Institute, Columbus, OH, USA
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155
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Garrison J, Li Z, Palanisamy B, Wang L, Seker E. An electrically-controlled programmable microfluidic concentration waveform generator. J Biol Eng 2018; 12:31. [PMID: 30564283 PMCID: PMC6295081 DOI: 10.1186/s13036-018-0126-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Accepted: 11/22/2018] [Indexed: 12/21/2022] Open
Abstract
Background Biological systems have complicated environmental conditions that vary both spatially and temporally. It becomes necessary to impose time-varying soluble factor concentrations to study such systems, including cellular responses to pharmaceuticals, inflammation with waxing and waning cytokine concentrations, as well as circadian rhythms and their metabolic manifestations. There is therefore a need for platforms that can achieve time-varying concentrations with arbitrary waveforms. Results To address this need, we developed a microfluidic system that can deliver concentration waveforms in a fast and accurate manner by adopting concepts and tools from electrical engineering and fluid mechanics. Specifically, we employed pulse width modulation (PWM), a commonly used method for generating analog signals from digital sources. We implement this technique using three microfluidic components via laser ablation prototyping: low-pass filter (lower frequency signals permitted, high frequency signals blocked), resistor, and mixer. Each microfluidic component was individually studied and iteratively tuned to generate desired concentration waveforms with high accuracy. Using fluorescein as a small-molecule soluble factor surrogate, we demonstrated a series of concentration waveforms, including square, sawtooth, sinusoidal, and triangle waves with frequencies ranging from 100 mHz to 400 mHz. Conclusion We reported the fabrication and characterization of microfluidic platform that can generate time-varying concentrations of fluorescein with arbitrary waveforms. We envision that this platform will enable a wide range of biological studies, where time-varying soluble factor concentrations play a critical role. In addition, the technology is expected to assist in the development of biomedical devices that allow precise dosing of pharmaceuticals for enhanced therapeutic efficacy and reduced toxicity.
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Affiliation(s)
- Joshua Garrison
- 1Department of Electrical & Computer Engineering, University of California - Davis, Davis, CA 95616 USA
| | - Zidong Li
- 2Department of Biomedical Engineering, University of California - Davis, Davis, CA 95616 USA
| | - Barath Palanisamy
- 2Department of Biomedical Engineering, University of California - Davis, Davis, CA 95616 USA
| | - Ling Wang
- 1Department of Electrical & Computer Engineering, University of California - Davis, Davis, CA 95616 USA
| | - Erkin Seker
- 1Department of Electrical & Computer Engineering, University of California - Davis, Davis, CA 95616 USA
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156
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Sergelen K, Liedberg B, Knoll W, Dostálek J. A surface plasmon field-enhanced fluorescence reversible split aptamer biosensor. Analyst 2018; 142:2995-3001. [PMID: 28744534 DOI: 10.1039/c7an00970d] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Surface plasmon field-enhanced fluorescence is reported for the readout of a heterogeneous assay that utilizes low affinity split aptamer ligands. Weak affinity ligands that reversibly interact with target analytes hold potential for facile implementation in continuous monitoring biosensor systems. This functionality is not possible without the regeneration of more commonly used assays relying on high affinity ligands and end-point measurement. In fluorescence-based sensors, the use of low affinity ligands allows avoiding this step but it imposes a challenge associated with the weak optical response to the specific capture of the target analyte which is also often masked by a strong background. The coupling of fluorophore labels with a confined field of surface plasmons is reported for strong amplification of the fluorescence signal emitted from the sensor surface and its efficient discrimination from the background. This optical scheme is demonstrated for time-resolved analysis of chosen model analytes - adenoside and adenosine triphosphate - with a split aptamer that exhibits an equilibrium affinity binding constant between 0.73 and 1.35 mM. The developed biosensor enables rapid and specific discrimination of target analyte concentration changes from low μM to mM in buffer as well as in 10% serum.
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Affiliation(s)
- K Sergelen
- BioSensor Technologies, AIT-Austrian Institute of Technology, Muthgasse 11, 1190 Vienna, Austria.
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157
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Wiraja C, Yeo DC, Lio DCS, Zheng M, Xu C. Functional Imaging with Nucleic-Acid-Based Sensors: Technology, Application and Future Healthcare Prospects. Chembiochem 2018; 20:437-450. [PMID: 30230165 DOI: 10.1002/cbic.201800430] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Indexed: 12/11/2022]
Abstract
Timely monitoring and assessment of human health plays a crucial role in maintaining the wellbeing of our advancing society. In addition to medical tools and devices, suitable probe agents are crucial to assist such monitoring, either in passive or active ways (i.e., sensors) through inducible signals. In this review we highlight recent developments in activatable optical sensors based on nucleic acids. Sensing mechanisms and bio-applications of these nucleic acid sensors in ex vivo assays, intracellular or in vivo settings are described. In addition, we discuss the limitations of these sensors and how nanotechnology can complement/enhance sensor properties to promote translation into clinical applications.
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Affiliation(s)
- Christian Wiraja
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | - David C Yeo
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | - Daniel Chin Shiuan Lio
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | - Mengjia Zheng
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | - Chenjie Xu
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore.,NTU-Northwestern Institute for Nanomedicine, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
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158
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Nguyen DT, Althage M, Magnone MC, Heydarkhan-Hagvall S. Translational strategy: humanized mini-organs. Drug Discov Today 2018; 23:1812-1817. [DOI: 10.1016/j.drudis.2018.05.039] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 05/07/2018] [Accepted: 05/29/2018] [Indexed: 12/14/2022]
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159
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Arroyo-Currás N, Ortega G, Copp DA, Ploense KL, Plaxco ZA, Kippin TE, Hespanha JP, Plaxco KW. High-Precision Control of Plasma Drug Levels Using Feedback-Controlled Dosing. ACS Pharmacol Transl Sci 2018; 1:110-118. [PMID: 32219207 PMCID: PMC7088981 DOI: 10.1021/acsptsci.8b00033] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Indexed: 12/30/2022]
Abstract
By, in effect, rendering pharmacokinetics an experimentally adjustable parameter, the ability to perform feedback-controlled dosing informed by high-frequency in vivo drug measurements would prove a powerful tool for both pharmacological research and clinical practice. Efforts to this end, however, have historically been thwarted by an inability to measure in vivo drug levels in real time and with sufficient convenience and temporal resolution. In response, we describe a closed-loop, feedback-controlled delivery system that uses drug level measurements provided by an in vivo electrochemical aptamer-based (E-AB) sensor to adjust dosing rates every 7 s. The resulting system supports the maintenance of either constant or predefined time-varying plasma drug concentration profiles in live rats over many hours. For researchers, the resultant high-precision control over drug plasma concentrations provides an unprecedented opportunity to (1) map the relationships between pharmacokinetics and clinical outcomes, (2) eliminate inter- and intrasubject metabolic variation as a confounding experimental variable, (3) accurately simulate human pharmacokinetics in animal models, and (4) measure minute-to-minute changes in a drug's pharmacokinetic behavior in response to changing health status, diet, drug-drug interactions, or other intrinsic and external factors. In the clinic, feedback-controlled drug delivery would improve our ability to accurately maintain therapeutic drug levels in the face of large, often unpredictable intra- and interpatient metabolic variation. This, in turn, would improve the efficacy and safety of therapeutic intervention, particularly for the most gravely ill patients, for whom metabolic variability is highest and the margin for therapeutic error is smallest.
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Affiliation(s)
- Netzahualcóyotl Arroyo-Currás
- Department
of Pharmacology and Molecular Sciences, Johns Hopkins School of Medicine, Baltimore, Maryland 21205, United States,E-mail: . Tel.: (410) 955-3569
| | - Gabriel Ortega
- ‡Department of Chemistry and Biochemistry, §Center for Bioengineering, ⊥Center for Control,
Dynamical Systems, and Computation, #Department of Psychological and Brain Sciences, and ∇The Neuroscience
Research Institute and Department of Molecular, Cellular, and Developmental
Biology, University of California Santa
Barbara, Santa
Barbara, California 93106, United States,CIC
bioGUNE, Bizkaia Technology Park, Ed. 801A, 48160, Derio, Spain
| | - David A. Copp
- ‡Department of Chemistry and Biochemistry, §Center for Bioengineering, ⊥Center for Control,
Dynamical Systems, and Computation, #Department of Psychological and Brain Sciences, and ∇The Neuroscience
Research Institute and Department of Molecular, Cellular, and Developmental
Biology, University of California Santa
Barbara, Santa
Barbara, California 93106, United States
| | - Kyle L. Ploense
- ‡Department of Chemistry and Biochemistry, §Center for Bioengineering, ⊥Center for Control,
Dynamical Systems, and Computation, #Department of Psychological and Brain Sciences, and ∇The Neuroscience
Research Institute and Department of Molecular, Cellular, and Developmental
Biology, University of California Santa
Barbara, Santa
Barbara, California 93106, United States
| | - Zoe A. Plaxco
- ‡Department of Chemistry and Biochemistry, §Center for Bioengineering, ⊥Center for Control,
Dynamical Systems, and Computation, #Department of Psychological and Brain Sciences, and ∇The Neuroscience
Research Institute and Department of Molecular, Cellular, and Developmental
Biology, University of California Santa
Barbara, Santa
Barbara, California 93106, United States
| | - Tod E. Kippin
- ‡Department of Chemistry and Biochemistry, §Center for Bioengineering, ⊥Center for Control,
Dynamical Systems, and Computation, #Department of Psychological and Brain Sciences, and ∇The Neuroscience
Research Institute and Department of Molecular, Cellular, and Developmental
Biology, University of California Santa
Barbara, Santa
Barbara, California 93106, United States
| | - João P. Hespanha
- ‡Department of Chemistry and Biochemistry, §Center for Bioengineering, ⊥Center for Control,
Dynamical Systems, and Computation, #Department of Psychological and Brain Sciences, and ∇The Neuroscience
Research Institute and Department of Molecular, Cellular, and Developmental
Biology, University of California Santa
Barbara, Santa
Barbara, California 93106, United States
| | - Kevin W. Plaxco
- ‡Department of Chemistry and Biochemistry, §Center for Bioengineering, ⊥Center for Control,
Dynamical Systems, and Computation, #Department of Psychological and Brain Sciences, and ∇The Neuroscience
Research Institute and Department of Molecular, Cellular, and Developmental
Biology, University of California Santa
Barbara, Santa
Barbara, California 93106, United States,E-mail: . Tel.: (805) 893-5558
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160
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Cao C, Jin R, Wei H, Yang W, Goldys EM, Hutchinson MR, Liu S, Chen X, Yang G, Liu G. Graphene Oxide Based Recyclable in Vivo Device for Amperometric Monitoring of Interferon-γ in Inflammatory Mice. ACS APPLIED MATERIALS & INTERFACES 2018; 10:33078-33087. [PMID: 30199621 DOI: 10.1021/acsami.8b13518] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Cytokine sensing is challenging due to their typically low abundances in physiological conditions. Nanomaterial fabricated interfaces demonstrated unique advantages in ultrasensitive sensing. Here, we demonstrate an amperometric sensing device based on graphene oxide (GO) and structure-switching aptamers for long-term detection of cytokines in a living organism. The device incorporates a single layer of GO acting as a signal amplifier on glassy carbon electrodes. The hairpin aptamers specific to interferon-γ (IFN-γ), which were loaded with redox probes, are covalently attached to GO to serve as biorecognition moieties. IFN-γ was able to trigger the configuration change of aptamers while releasing the trapped redox probes to introduce the electrochemical signal. This in vivo device was capable of quantitatively and dynamically detecting IFN-γ down to 1.3 pg mL-1 secreted by immune cells in cell culture medium with no baseline drift even at a high concentration of other nonspecific proteins. The biocompatible devices were also implanted into subcutaneous tissue of enteritis mice, where they performed precise detection of IFN-γ over 48 h without using physical barriers or active drift correction algorithms. Moreover, the device could be reused even after multiple rounds of regeneration of the sensing interface.
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Affiliation(s)
- Chaomin Cao
- International Joint Research Center for Intelligent Biosensor Technology and Health, College of Chemistry , Central China Normal University , Wuhan , 430079 , P. R. China
| | - Ronghua Jin
- School of Chemical Engineering and Technology, Shanxi Key Laboratory of Energy Chemical Process Intensification, Institute of Polymer Science in Chemical Engineering , Xi'an Jiao Tong University , Xi'an , 710049 , P. R. China
| | - Hui Wei
- International Joint Research Center for Intelligent Biosensor Technology and Health, College of Chemistry , Central China Normal University , Wuhan , 430079 , P. R. China
| | - Wenchao Yang
- International Joint Research Center for Intelligent Biosensor Technology and Health, College of Chemistry , Central China Normal University , Wuhan , 430079 , P. R. China
| | - Ewa M Goldys
- Graduate School of Biomedical Engineering, ARC Centre of Excellence in Nanoscale BioPhotonics (CNBP) , The University of New South Wales , Sydney , New South Wales , 2052 , Australia
| | - Mark R Hutchinson
- ARC Centre of Excellence in Nanoscale BioPhotonics (CNBP) , The University of Adelaide , Adelaide , South Australia , 5000 , Australia
- Discipline of Physiology, Adelaide Medical School , University of Adelaide , Adelaide , South Australia , 5005 , Australia
| | - Shiyu Liu
- State Key Laboratory of Military Stomatology, Center for Tissue Engineering, School of Stomatology , The Fourth Military Medical University , Xi'an , 710032 , P. R. China
| | - Xin Chen
- School of Chemical Engineering and Technology, Shanxi Key Laboratory of Energy Chemical Process Intensification, Institute of Polymer Science in Chemical Engineering , Xi'an Jiao Tong University , Xi'an , 710049 , P. R. China
| | - Guangfu Yang
- International Joint Research Center for Intelligent Biosensor Technology and Health, College of Chemistry , Central China Normal University , Wuhan , 430079 , P. R. China
| | - Guozhen Liu
- International Joint Research Center for Intelligent Biosensor Technology and Health, College of Chemistry , Central China Normal University , Wuhan , 430079 , P. R. China
- Graduate School of Biomedical Engineering, ARC Centre of Excellence in Nanoscale BioPhotonics (CNBP) , The University of New South Wales , Sydney , New South Wales , 2052 , Australia
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161
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Akki SU, Werth CJ. Critical Review: DNA Aptasensors, Are They Ready for Monitoring Organic Pollutants in Natural and Treated Water Sources? ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:8989-9007. [PMID: 30016080 DOI: 10.1021/acs.est.8b00558] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
There is a growing need to monitor anthropogenic organic contaminants detected in water sources. DNA aptamers are synthetic single-stranded oligonucleotides, selected to bind to target contaminants with favorable selectivity and sensitivity. These aptamers can be functionalized and are used with a variety of sensing platforms to develop sensors, or aptasensors. In this critical review, we (1) identify the state-of-the-art in DNA aptamer selection, (2) evaluate target and aptamer properties that make for sensitive and selective binding and sensing, (3) determine strengths and weaknesses of alternative sensing platforms, and (4) assess the potential for aptasensors to quantify environmentally relevant concentrations of organic contaminants in water. Among a suite of target and aptamer properties, binding affinity is either directly (e.g., organic carbon partition coefficient) or inversely (e.g., polar surface area) correlated to properties that indicate greater target hydrophobicity results in the strongest binding aptamers, and binding affinity is correlated to aptasensor limits of detection. Electrochemical-based aptasensors show the greatest sensitivity, which is similar to ELISA-based methods. Only a handful of aptasensors can detect organic pollutants at environmentally relevant concentrations, and interference from structurally similar analogs commonly present in natural waters is a yet-to-be overcome challenge. These findings lead to recommendations to improve aptasensor performance.
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Affiliation(s)
- Spurti U Akki
- Department of Civil and Environmental Engineering , University of Illinois at Urbana-Champaign , 205 North Mathews Avenue , Urbana , Illinois 61801 , United States
| | - Charles J Werth
- Department of Civil, Architecture, and Environmental Engineering , University of Texas at Austin , 301 East Dean Keeton Street , Austin , Texas 78712 , United States
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162
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Modena MM, Chawla K, Misun PM, Hierlemann A. Smart Cell Culture Systems: Integration of Sensors and Actuators into Microphysiological Systems. ACS Chem Biol 2018; 13:1767-1784. [PMID: 29381325 PMCID: PMC5959007 DOI: 10.1021/acschembio.7b01029] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Technological advances in microfabrication techniques in combination with organotypic cell and tissue models have enabled the realization of microphysiological systems capable of recapitulating aspects of human physiology in vitro with great fidelity. Concurrently, a number of analysis techniques has been developed to probe and characterize these model systems. However, many assays are still performed off-line, which severely compromises the possibility of obtaining real-time information from the samples under examination, and which also limits the use of these platforms in high-throughput analysis. In this review, we focus on sensing and actuation schemes that have already been established or offer great potential to provide in situ detection or manipulation of relevant cell or tissue samples in microphysiological platforms. We will first describe methods that can be integrated in a straightforward way and that offer potential multiplexing and/or parallelization of sensing and actuation functions. These methods include electrical impedance spectroscopy, electrochemical biosensors, and the use of surface acoustic waves for manipulation and analysis of cells, tissue, and multicellular organisms. In the second part, we will describe two sensor approaches based on surface-plasmon resonance and mechanical resonators that have recently provided new characterization features for biological samples, although technological limitations for use in high-throughput applications still exist.
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Affiliation(s)
- Mario M. Modena
- ETH Zürich, Department of Biosystems Science and Engineering,
Bio Engineering Laboratory, Basel, Switzerland
| | - Ketki Chawla
- ETH Zürich, Department of Biosystems Science and Engineering,
Bio Engineering Laboratory, Basel, Switzerland
| | - Patrick M. Misun
- ETH Zürich, Department of Biosystems Science and Engineering,
Bio Engineering Laboratory, Basel, Switzerland
| | - Andreas Hierlemann
- ETH Zürich, Department of Biosystems Science and Engineering,
Bio Engineering Laboratory, Basel, Switzerland
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163
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Tenaglia E, Ferretti A, Decosterd LA, Werner D, Mercier T, Widmer N, Buclin T, Guiducci C. Comparison against current standards of a DNA aptamer for the label-free quantification of tobramycin in human sera employed for therapeutic drug monitoring. J Pharm Biomed Anal 2018; 159:341-347. [PMID: 30025299 DOI: 10.1016/j.jpba.2018.06.061] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 06/14/2018] [Accepted: 06/29/2018] [Indexed: 12/28/2022]
Abstract
The use of DNA aptamers in biosensors for the quantification of pharmaceuticals in the clinics would help to overcome the limitations of antibody-based detection for small molecules. The interest for such systems is proven by the ever-increasing number of aptamer-based solutions for analytics proposed in the literature as proof-of-concept demonstrators. Despite such diversity, these platforms often lack a comparative assessment of their performances against the current standard of practice in the clinics when using real samples. We employed an aptamer against tobramycin discovered in our laboratory to quantify through surface plasmon resonance the concentration of the antibiotic in clinical samples obtained from patients treated with tobramycin and undergoing therapeutic drug monitoring. We then compared the performances of our detection strategy against the current standard of practice. Our results show how, using adequate calibration and matrix complexity reduction, DNA aptamer-based direct assays can assess clinically relevant concentrations of small molecules in patient serum and with good correlation to current standards used in the clinics.
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Affiliation(s)
- Enrico Tenaglia
- Ecole Polytechnique Fédérale de Lausanne, Institute of Bioengineering, Station 17, CH-1015 Lausanne, Switzerland
| | - Anna Ferretti
- Ecole Polytechnique Fédérale de Lausanne, Institute of Bioengineering, Station 17, CH-1015 Lausanne, Switzerland
| | - Laurent A Decosterd
- Laboratory of Clinical Pharmacology, Service of Clinical Pharmacology, Lausanne University Hospital, Lausanne, Switzerland
| | - Dominique Werner
- Clinical Chemistry Laboratory, Lausanne University Hospital, Lausanne, Switzerland
| | - Thomas Mercier
- Laboratory of Clinical Pharmacology, Service of Clinical Pharmacology, Lausanne University Hospital, Lausanne, Switzerland
| | - Nicolas Widmer
- Service of Clinical Pharmacology, Lausanne University Hospital, Lausanne, Switzerland; Pharmacy of Eastern Vaud Hospitals, Vevey, Switzerland
| | - Thierry Buclin
- Service of Clinical Pharmacology, Lausanne University Hospital, Lausanne, Switzerland
| | - Carlotta Guiducci
- Ecole Polytechnique Fédérale de Lausanne, Institute of Bioengineering, Station 17, CH-1015 Lausanne, Switzerland.
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164
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Xiong C, Zhang T, Wang D, Lin Y, Qu H, Chen W, Luo L, Wang Y, Zheng L, Fu L. Highly sensitive solution-gated graphene transistor based sensor for continuous and real-time detection of free chlorine. Anal Chim Acta 2018; 1033:65-72. [PMID: 30172333 DOI: 10.1016/j.aca.2018.06.041] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Revised: 04/07/2018] [Accepted: 06/13/2018] [Indexed: 11/17/2022]
Abstract
The concentration of free chlorine used for sterilizing drinking water, recreational water, and food processing water is critical for monitoring potential environmental and human health risks, and should be strictly controlled. Here, we report a highly efficient solution-gated graphene transistor (SGGT) device, for the detection of free chlorine in a real-time and convenient manner with excellent selectivity and high sensitivity. The detection mechanism of the SGGT with Au gate electrode is attributed to two combined effects: the reduction of the free chlorine on Au gate electrode; and the direct oxidization of graphene by the free chlorine in solution. The SGGT device shows a linear response range of free chlorine from 1 μM to 100 μM, with detection limit as low as 100 nM, far beyond the sensitivity required for practical applications. Finally, we also demonstrate the performance of the SGGT for determination of free chlorine in local tap water samples. The results presented herein have important implications in the development of portable and disposable devices based on SGGT sensing platform for the simple, real-time, and selective determination of free chlorine.
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Affiliation(s)
- Can Xiong
- School of Food Science and Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Tengfei Zhang
- School of Electronic Science and Applied Physics, Hefei University of Technology, Hefei, 230009, China
| | - Di Wang
- School of Electronic Science and Applied Physics, Hefei University of Technology, Hefei, 230009, China
| | - Yi Lin
- School of Electronic Science and Applied Physics, Hefei University of Technology, Hefei, 230009, China
| | - Hao Qu
- School of Biological and Medical Engineering, Hefei University of Technology, Hefei, 230009, China; CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
| | - Wei Chen
- School of Food Science and Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Linbao Luo
- School of Electronic Science and Applied Physics, Hefei University of Technology, Hefei, 230009, China
| | - Yanbo Wang
- Key Laboratory for Food Microbial Technology of Zhejiang Province, Zhejiang Gongshang University, Hangzhou, 310035, China
| | - Lei Zheng
- School of Food Science and Engineering, Hefei University of Technology, Hefei, 230009, China.
| | - Linglin Fu
- Key Laboratory for Food Microbial Technology of Zhejiang Province, Zhejiang Gongshang University, Hangzhou, 310035, China.
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165
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Sismaet HJ, Goluch ED. Electrochemical Probes of Microbial Community Behavior. ANNUAL REVIEW OF ANALYTICAL CHEMISTRY (PALO ALTO, CALIF.) 2018; 11:441-461. [PMID: 29490192 DOI: 10.1146/annurev-anchem-061417-125627] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Advances in next-generation sequencing technology along with decreasing costs now allow the microbial population, or microbiome, of a location to be determined relatively quickly. This research reveals that microbial communities are more diverse and complex than ever imagined. New and specialized instrumentation is required to investigate, with high spatial and temporal resolution, the dynamic biochemical environment that is created by microbes, which allows them to exist in every corner of the Earth. This review describes how electrochemical probes and techniques are being used and optimized to learn about microbial communities. Described approaches include voltammetry, electrochemical impedance spectroscopy, scanning electrochemical microscopy, separation techniques coupled with electrochemical detection, and arrays of complementary metal-oxide-semiconductor circuits. Microbial communities also interact with and influence their surroundings; therefore, the review also includes a discussion of how electrochemical probes optimized for microbial analysis are utilized in healthcare diagnostics and environmental monitoring applications.
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Affiliation(s)
- Hunter J Sismaet
- Department of Chemical Engineering, Northeastern University, Boston, Massachusetts 02115, USA;
| | - Edgar D Goluch
- Department of Chemical Engineering, Northeastern University, Boston, Massachusetts 02115, USA;
- Department of Bioengineering, Department of Biology, and Department of Civil and Environmental Engineering, Northeastern University, Boston, Massachusetts 02115, USA
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166
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Scholten K, Meng E. A review of implantable biosensors for closed-loop glucose control and other drug delivery applications. Int J Pharm 2018; 544:319-334. [DOI: 10.1016/j.ijpharm.2018.02.022] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Revised: 01/30/2018] [Accepted: 02/15/2018] [Indexed: 12/19/2022]
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167
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Cao C, Zhang F, Goldys EM, Gao F, Liu G. Advances in structure-switching aptasensing towards real time detection of cytokines. Trends Analyt Chem 2018. [DOI: 10.1016/j.trac.2018.03.002] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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168
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Electrochemical Aptamer-Based Sensors for Rapid Point-of-Use Monitoring of the Mycotoxin Ochratoxin A Directly in a Food Stream. Molecules 2018; 23:molecules23040912. [PMID: 29662036 PMCID: PMC6016998 DOI: 10.3390/molecules23040912] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 03/30/2018] [Accepted: 04/11/2018] [Indexed: 11/16/2022] Open
Abstract
The ability to measure the concentration of specific small molecules continuously and in real-time in complex sample streams would impact many areas of agriculture, food safety, and food production. Monitoring for mycotoxin taint in real time during food processing, for example, could improve public health. Towards this end, we describe here an inexpensive electrochemical DNA-based sensor that supports real-time monitor of the mycotoxin ochratoxin A in a flowing stream of foodstuffs.
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169
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Rawson TM, O’Hare D, Herrero P, Sharma S, Moore LSP, de Barra E, Roberts JA, Gordon AC, Hope W, Georgiou P, Cass AEG, Holmes AH. Delivering precision antimicrobial therapy through closed-loop control systems. J Antimicrob Chemother 2018; 73:835-843. [PMID: 29211877 PMCID: PMC5890674 DOI: 10.1093/jac/dkx458] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Sub-optimal exposure to antimicrobial therapy is associated with poor patient outcomes and the development of antimicrobial resistance. Mechanisms for optimizing the concentration of a drug within the individual patient are under development. However, several barriers remain in realizing true individualization of therapy. These include problems with plasma drug sampling, availability of appropriate assays, and current mechanisms for dose adjustment. Biosensor technology offers a means of providing real-time monitoring of antimicrobials in a minimally invasive fashion. We report the potential for using microneedle biosensor technology as part of closed-loop control systems for the optimization of antimicrobial therapy in individual patients.
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Affiliation(s)
- T M Rawson
- National Institute for Health Research Health Protection Research Unit in Healthcare Associated Infections and Antimicrobial Resistance, Imperial College London, Hammersmith Campus, Du Cane Road, London, UK
| | - D O’Hare
- Department of Bioengineering, Imperial College London, London, UK
| | - P Herrero
- Department of Electrical and Electronic Engineering, Imperial College London, South Kensington Campus, London, UK
| | - S Sharma
- College of Engineering, Swansea University, Swansea, UK
| | - L S P Moore
- National Institute for Health Research Health Protection Research Unit in Healthcare Associated Infections and Antimicrobial Resistance, Imperial College London, Hammersmith Campus, Du Cane Road, London, UK
- Imperial College Healthcare NHS Trust, Hammersmith Hospital, Du Cane Road, Acton, UK
| | - E de Barra
- Imperial College Healthcare NHS Trust, Hammersmith Hospital, Du Cane Road, Acton, UK
| | - J A Roberts
- University of Queensland Centre for Clinical Research, Faculty of Medicine and Centre for Translational Pharmacodynamics, School of Pharmacy, The University of Queensland, Brisbane, Australia
- Royal Brisbane and Women’s Hospital, Brisbane, Australia
| | - A C Gordon
- Section of Anaesthetics, Pain Medicine & Intensive Care, Imperial College London, London, UK
| | - W Hope
- Department of Molecular and Clinical Pharmacology, University of Liverpool, Liverpool, UK
| | - P Georgiou
- Department of Electrical and Electronic Engineering, Imperial College London, South Kensington Campus, London, UK
| | - A E G Cass
- Department of Chemistry & Institute of Biomedical Engineering, Imperial College London, Kensington Campus, London, UK
| | - A H Holmes
- National Institute for Health Research Health Protection Research Unit in Healthcare Associated Infections and Antimicrobial Resistance, Imperial College London, Hammersmith Campus, Du Cane Road, London, UK
- Imperial College Healthcare NHS Trust, Hammersmith Hospital, Du Cane Road, Acton, UK
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170
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Harroun SG, Prévost-Tremblay C, Lauzon D, Desrosiers A, Wang X, Pedro L, Vallée-Bélisle A. Programmable DNA switches and their applications. NANOSCALE 2018; 10:4607-4641. [PMID: 29465723 DOI: 10.1039/c7nr07348h] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
DNA switches are ideally suited for numerous nanotechnological applications, and increasing efforts are being directed toward their engineering. In this review, we discuss how to engineer these switches starting from the selection of a specific DNA-based recognition element, to its adaptation and optimisation into a switch, with applications ranging from sensing to drug delivery, smart materials, molecular transporters, logic gates and others. We provide many examples showcasing their high programmability and recent advances towards their real life applications. We conclude with a short perspective on this exciting emerging field.
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Affiliation(s)
- Scott G Harroun
- Laboratory of Biosensors & Nanomachines, Département de Chimie, Université de Montréal, Montréal, Québec H3C 3J7, Canada.
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171
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Arroyo-Currás N, Dauphin-Ducharme P, Ortega G, Ploense KL, Kippin TE, Plaxco KW. Subsecond-Resolved Molecular Measurements in the Living Body Using Chronoamperometrically Interrogated Aptamer-Based Sensors. ACS Sens 2018; 3:360-366. [PMID: 29124939 DOI: 10.1021/acssensors.7b00787] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Electrochemical, aptamer-based (E-AB) sensors support the continuous, real-time measurement of specific small molecules directly in situ in the living body over the course of many hours. They achieve this by employing binding-induced conformational changes to alter electron transfer from a redox-reporter-modified, electrode-attached aptamer. Previously we have used voltammetry (cyclic, alternating current, and square wave) to monitor this binding-induced change in transfer kinetics indirectly. Here, however, we demonstrate the potential advantages of employing chronoamperometry to measure the change in kinetics directly. In this approach target concentration is reported via changes in the lifetime of the exponential current decay seen when the sensor is subjected to a potential step. Because the lifetime of this decay is independent of its amplitude (e.g., insensitive to variations in the number of aptamer probes on the electrode), chronoamperometrically interrogated E-AB sensors are calibration-free and resistant to drift. Chronoamperometric measurements can also be performed in a few hundred milliseconds, improving the previous few-second time resolution of E-AB sensing by an order of magnitude. To illustrate the potential value of the approach we demonstrate here the calibration-free measurement of the drug tobramycin in situ in the living body with 300 ms time resolution and unprecedented, few-percent precision in the determination of its pharmacokinetic phases.
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Affiliation(s)
| | | | - Gabriel Ortega
- CIC bioGUNE, Bizkaia Technology Park, Ed
801 A, 48160, Derio, Spain
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172
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Daniel J, Fetter L, Jett S, Rowland TJ, Bonham AJ. Electrochemical Aptamer Scaffold Biosensors for Detection of Botulism and Ricin Proteins. Methods Mol Biol 2018; 1600:9-23. [PMID: 28478553 DOI: 10.1007/978-1-4939-6958-6_2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Electrochemical DNA (E-DNA) biosensors enable the detection and quantification of a variety of molecular targets, including oligonucleotides, small molecules, heavy metals, antibodies, and proteins. Here we describe the design, electrode preparation and sensor attachment, and voltammetry conditions needed to generate and perform measurements using E-DNA biosensors against two protein targets, the biological toxins ricin and botulinum neurotoxin. This method can be applied to generate E-DNA biosensors for the detection of many other protein targets, with potential advantages over other systems including sensitive detection limits typically in the nanomolar range, real-time monitoring, and reusable biosensors.
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Affiliation(s)
- Jessica Daniel
- Department of Chemistry, Metropolitan State University of Denver, 890 Auraria Parkway, Denver, CO, 80220, USA
| | - Lisa Fetter
- Department of Chemistry, Metropolitan State University of Denver, 890 Auraria Parkway, Denver, CO, 80220, USA
| | - Susan Jett
- Department of Chemistry, Metropolitan State University of Denver, 890 Auraria Parkway, Denver, CO, 80220, USA
| | - Teisha J Rowland
- Cardiovascular Institute and Adult Medical Genetics Program, University of Colorado Denver Anschutz Medical Campus, 12700 E 19th Ave, Aurora, 80045, CO, USA
| | - Andrew J Bonham
- Department of Chemistry, Metropolitan State University of Denver, 890 Auraria Parkway, Denver, CO, 80220, USA.
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173
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Phan DT, Jin L, Wustoni S, Chen CH. Buffer-free integrative nanofluidic device for real-time continuous flow bioassays by ion concentration polarization. LAB ON A CHIP 2018; 18:574-584. [PMID: 29299579 DOI: 10.1039/c7lc01066d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
To perform precision medicine in real-time, a sensor capable of continuously monitoring target biomolecules secreted from a patient under dynamic situations is essential. In this study, a novel portable device combining an aptamer probe and a nanofluidic component was developed, enabling the buffer-free continuous monitoring of small molecules in biological fluids. This integration is synergistic: the aptamer sensor is used to bind target biomolecules, triggering a fluorescence signal change, while the nanofluidic component is applied to achieve ion concentration polarization and convert serum into a clean buffer for aptamer signal regeneration. To demonstrate the system's versatility, we measured various adenosine triphosphate concentrations in human serum for hours with high sensitivity and specificity at minute temporal resolution. Our results demonstrate that this integrative device can be applied for the continuous measurement of target biomolecules and online signal regeneration in patient samples without the use of bulky clean buffer solutions for dynamic real-time healthcare.
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Affiliation(s)
- Dinh-Tuan Phan
- Department of Biomedical Engineering, National University of Singapore, 7 Engineering Drive 1, Singapore 117574.
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174
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Noell G, Faner R, Agustí A. From systems biology to P4 medicine: applications in respiratory medicine. Eur Respir Rev 2018; 27:27/147/170110. [PMID: 29436404 PMCID: PMC9489012 DOI: 10.1183/16000617.0110-2017] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Accepted: 11/30/2017] [Indexed: 12/22/2022] Open
Abstract
Human health and disease are emergent properties of a complex, nonlinear, dynamic multilevel biological system: the human body. Systems biology is a comprehensive research strategy that has the potential to understand these emergent properties holistically. It stems from advancements in medical diagnostics, “omics” data and bioinformatic computing power. It paves the way forward towards “P4 medicine” (predictive, preventive, personalised and participatory), which seeks to better intervene preventively to preserve health or therapeutically to cure diseases. In this review, we: 1) discuss the principles of systems biology; 2) elaborate on how P4 medicine has the potential to shift healthcare from reactive medicine (treatment of illness) to predict and prevent illness, in a revolution that will be personalised in nature, probabilistic in essence and participatory driven; 3) review the current state of the art of network (systems) medicine in three prevalent respiratory diseases (chronic obstructive pulmonary disease, asthma and lung cancer); and 4) outline current challenges and future goals in the field. Systems biology and network medicine have the potential to transform medical research and practicehttp://ow.ly/r3jR30hf35x
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Affiliation(s)
- Guillaume Noell
- Institut d'Investigacions Biomediques August Pi i Sunyer (IDIBAPS), Barcelona, Spain.,CIBER Enfermedades Respiratorias (CIBERES), Barcelona, Spain
| | - Rosa Faner
- Institut d'Investigacions Biomediques August Pi i Sunyer (IDIBAPS), Barcelona, Spain.,CIBER Enfermedades Respiratorias (CIBERES), Barcelona, Spain
| | - Alvar Agustí
- Institut d'Investigacions Biomediques August Pi i Sunyer (IDIBAPS), Barcelona, Spain .,CIBER Enfermedades Respiratorias (CIBERES), Barcelona, Spain.,Respiratory Institute, Hospital Clinic, Universitat de Barcelona, Barcelona, Spain
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175
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Bizzotto D, Burgess IJ, Doneux T, Sagara T, Yu HZ. Beyond Simple Cartoons: Challenges in Characterizing Electrochemical Biosensor Interfaces. ACS Sens 2018; 3:5-12. [PMID: 29282982 DOI: 10.1021/acssensors.7b00840] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Design and development of surface-based biosensors is challenging given the multidisciplinary nature of this enterprise, which is certainly the case for electrochemical biosensors. Self-assembly approaches are used to modify the surface with capture probes along with electrochemical methods for detection. Complex surface structures are created to improve the probe-target interaction. These multicomponent surface structures are usually idealized in schematic representations. Many rely on the analytical performance of the sensor surface as an indication of the quality of the surface modification strategy. While directly linked to the eventual device, arguments for pursuing a more extensive characterization of the molecular environments at the surface are presented as a path to understanding how to make electrochemical sensors that are more robust, reliable with improved sensitivity. This is a complex task that is most often accomplished using methods that only report the average characteristics of the surface. Less often applied are methods that are sensitive to the probe (or adsorbate) present in nonideal configurations (e.g., aggregates, clusters, nonspecifically adsorbed). Though these structures may compose a small fraction of the overall modified surface, they have an uncertain impact on sensor performance and reliability. Addressing this issue requires application of imaging methods over a variety of length scales (e.g., optical microscopy and/or scanning probe microscopy) that provide valuable insight into the diversity of surface structures and molecular environments present at the sensing interface. Furthermore, using in situ analytical methods, while complex, can be more relevant to the sensing environment. Reliable measurements of the nature and extent of these features are required to assess the impact of these nonideal configurations on the sensing process. The development and use of methods that can characterize complex surface based biosensors is arguably required, highlighting the need for a multidisciplinary approach toward the preparation and analysis of the biosensor surface. In many ways, representing the surface without reliance on overly simplified cartoons will highlight these important considerations for improving sensor characteristics.
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Affiliation(s)
- Dan Bizzotto
- Department
of Chemistry, The University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Ian J. Burgess
- Department
of Chemistry, University of Saskatchewan, Saskatoon, SK S7N 5A2, Canada
| | - Thomas Doneux
- Chimie
Analytique et Chimie des Interfaces, Faculté des Sciences, Université libre de Bruxelles (ULB), 1050 Bruxelles, Belgium
| | - Takamasa Sagara
- Division
of Chemistry and Materials Science, Graduate School of Engineering, Nagasaki University, Nagasaki, Nagasaki 852-8131, Japan
| | - Hua-Zhong Yu
- Department
of Chemistry, Simon Fraser University, Burnaby, BC V5A 1S6, Canada
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176
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Li M, Guo X, Li H, Zuo X, Hao R, Song H, Aldalbahi A, Ge Z, Li J, Li Q, Song S, Li S, Shao N, Fan C, Wang L. Epitope Binning Assay Using an Electron Transfer-Modulated Aptamer Sensor. ACS APPLIED MATERIALS & INTERFACES 2018; 10:341-349. [PMID: 29241329 DOI: 10.1021/acsami.7b17324] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Surface plasmon resonance and quartz crystal microbalance are workhorses of protein-DNA interaction research for over 20 years, providing ways to quantitatively determine the protein-DNA binding. However, the cost, necessary technical expertise, and severe nonspecific adsorption poses barriers to their use. Convenient and effective techniques for the measurement of protein-DNA binding affinity and the epitope binning between DNA and proteins for developing highly sensitive detection platform remain challenging. Here, we develop a binding-induced alteration in electron transfer kinetics of the redox reporter labeled (methylene blue) on DNA aptamer to measure the binding affinity between prostate-specific antigen (PSA) and aptamer. We demonstrate that the binding of PSA to aptamer decreases the electron transfer rate of methylene blue for ∼45%. Further, we identify the best pairwise selection of aptamers for developing sandwich assay by sorting from 10 pairwise modes with the PSA detection limit of 500 ng/mL. Our study provides promising ways to analyze the binding affinity between ligand and receptor and to sort pairwise between aptamers or antibodies for the development of highly sensitive sandwich immunoassays.
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Affiliation(s)
- Min Li
- Division of Physical Biology & Bioimaging Center, Shanghai Institute of Applied Physics, Chinese Academy of Sciences , Shanghai 201800, China
- University of Chinese Academy of Sciences , Beijing 100049, China
| | - Xudong Guo
- Institute of Disease Control and Prevention, AMMS , Beijing 100071, China
| | - Hui Li
- Beijing Institute of Basic Medical Sciences , Beijing 100850, China
| | - Xiaolei Zuo
- Division of Physical Biology & Bioimaging Center, Shanghai Institute of Applied Physics, Chinese Academy of Sciences , Shanghai 201800, China
- Institute of Molecular Medicine, Renji Hospital, School of Medicine and School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University , Shanghai 200240, China
| | - Rongzhang Hao
- Institute of Disease Control and Prevention, AMMS , Beijing 100071, China
| | - Hongbin Song
- Institute of Disease Control and Prevention, AMMS , Beijing 100071, China
| | - Ali Aldalbahi
- Chemistry Department, King Saud University , Riyadh 11451, Saudi Arabia
| | - Zhilei Ge
- Division of Physical Biology & Bioimaging Center, Shanghai Institute of Applied Physics, Chinese Academy of Sciences , Shanghai 201800, China
| | - Jiang Li
- Division of Physical Biology & Bioimaging Center, Shanghai Institute of Applied Physics, Chinese Academy of Sciences , Shanghai 201800, China
| | - Qian Li
- Division of Physical Biology & Bioimaging Center, Shanghai Institute of Applied Physics, Chinese Academy of Sciences , Shanghai 201800, China
| | - Shiping Song
- Division of Physical Biology & Bioimaging Center, Shanghai Institute of Applied Physics, Chinese Academy of Sciences , Shanghai 201800, China
| | - Shaohua Li
- Beijing Institute of Basic Medical Sciences , Beijing 100850, China
| | - Ningsheng Shao
- Beijing Institute of Basic Medical Sciences , Beijing 100850, China
| | - Chunhai Fan
- Division of Physical Biology & Bioimaging Center, Shanghai Institute of Applied Physics, Chinese Academy of Sciences , Shanghai 201800, China
| | - Lihua Wang
- Division of Physical Biology & Bioimaging Center, Shanghai Institute of Applied Physics, Chinese Academy of Sciences , Shanghai 201800, China
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177
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The emerging role of nanomaterials in immunological sensing - a brief review. Mol Immunol 2018; 98:28-35. [PMID: 29325980 DOI: 10.1016/j.molimm.2017.12.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Revised: 12/13/2017] [Accepted: 12/19/2017] [Indexed: 12/13/2022]
Abstract
Nanomaterials are beginning to play an important role in the next generation of immunological assays and biosensors, with potential impacts both in research and clinical practice. In this brief review, we highlight two areas in which nanomaterials are already making new and important contributions in the past 5-10 years: firstly, in the improvement of assay and biosensor sensitivity for detection of low abundance proteins of immunological significance, and secondly, in the real-time and continuous monitoring of protein secretion from arrays of individual cells. We finish by challenging the immunology/sensing communities to work together to develop nanomaterials that can provide real-time, continuous, and sensitive molecular readouts in vivo, a lofty goal that will require significant collaborative effort.
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178
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Herrero P, Rawson TM, Philip A, Moore LSP, Holmes AH, Georgiou P. Closed-Loop Control for Precision Antimicrobial Delivery: An In Silico Proof-of-Concept. IEEE Trans Biomed Eng 2017; 65:2231-2236. [PMID: 29989937 DOI: 10.1109/tbme.2017.2787423] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
OBJECTIVE Inappropriate dosing of patients with antibiotics is a driver of antimicrobial resistance, toxicity, and poor outcomes of therapy. In this paper, we investigate, in silico, the hypothesis that the use of a closed-loop control system could improve the attainment of pharmacokinetic-pharmacodynamic targets for antimicrobial therapy, where wide variations in target attainment have been reported. This includes patients in critical care, patients with renal disease, and patients with obesity. METHODS The presented in silico study focuses on vancomycin delivery, a first line therapy for Methicillin-resistant Staphylococcus aureus (MRSA) that has serious side effects, including nephrotoxicity. For this purpose, an in silico platform for the simulation of pharmacokinetics of vancomycin agents was developed including 24 virtual noncritically ill-adult subjects obtained from routinely collected data from two prospective audits of vancomycin therapy. Intraday variability on renal clearance, sensor error, and infusion constraints were taken into account. Proportional integral derivative (PID) controller was chosen because of its simplicity of implementation and satisfactory performance. RESULTS Even though significant intraday variability and sensor error were considered in the simulations, by assuming a minimum inhibitory concentration of 1 mg/l for MRSA, the proposed controller was able to reach the well-established therapeutic target of 24-h area under curve to minimum inhibitory concentration ratio equal to 400 $\text{mg} \cdot \text{h}\text{/}\text{l}$ for all the studied subjects, while staying significantly below toxic levels. CONCLUSION A PID controller has the potential to precisely deliver a vancomycin therapy in a noncritically ill-adult population. SIGNIFICANCE Closed-loop control for precision Vancomycin delivery can potentially reduce toxicity and poor therapeutic outcomes, as well as reduce antimicrobial resistance.
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179
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Liu Y, Rahimian A, Krylyuk S, Vu T, Crulhas B, Stybayeva G, Imanbekova M, Shin DS, Davydov A, Revzin A. Nanowire Aptasensors for Electrochemical Detection of Cell-Secreted Cytokines. ACS Sens 2017; 2:1644-1652. [PMID: 28991491 DOI: 10.1021/acssensors.7b00486] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Cytokines are small proteins secreted by immune cells in response to pathogens/infections; therefore, these proteins can be used in diagnosing infectious diseases. For example, release of a cytokine interferon (IFN)-γ from T-cells is used for blood-based diagnosis of tuberculosis (TB). Our lab has previously developed an atpamer-based electrochemical biosensor for rapid and sensitive detection of IFN-γ. In this study, we explored the use of silicon nanowires (NWs) as a way to create nanostructured electrodes with enhanced sensitivity for IFN-γ. Si NWs were covered with gold and were further functionalized with thiolated aptamers specific for IFN-γ. Aptamer molecules were designed to form a hairpin and in addition to terminal thiol groups contained redox reporter molecules methylene blue. Binding of analyte to aptamer-modified NWs (termed here nanowire aptasensors) inhibited electron transfer from redox reporters to the electrode and caused electrochemical redox signal to decrease. In a series of experiments we demonstrate that NW aptasensors responded 3× faster and were 2× more sensitive to IFN-γ compared to standard flat electrodes. Most significantly, NW aptasensors allowed detection of IFN-γ from as few as 150 T-cells/mL while ELISA did not pick up signal from the same number of cells. One of the challenges faced by ELISA-based TB diagnostics is poor performance in patients whose T-cell numbers are low, typically HIV patients. Therefore, NW aptasensors developed here may be used in the future for more sensitive monitoring of IFN-γ responses in patients coinfected with HIV/TB.
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Affiliation(s)
- Ying Liu
- Department
of Biomedical Engineering, University of California, Davis, Davis, California 95616, United States
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry & Chemical Engineering, Nanjing University, Nanjing, 210008, China
| | - Ali Rahimian
- Department
of Biomedical Engineering, University of California, Davis, Davis, California 95616, United States
- Department
of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota 55905, United States
| | - Sergiy Krylyuk
- Materials
Science and Engineering Division, Materials Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
- Institute
for Research in Electronics and Applied Physics, University of Maryland, College
Park, Maryland 20742, United States
| | - Tam Vu
- Department
of Biomedical Engineering, University of California, Davis, Davis, California 95616, United States
| | - Bruno Crulhas
- Department
of Biomedical Engineering, University of California, Davis, Davis, California 95616, United States
| | - Gulnaz Stybayeva
- National Center for Biotechnology of the Republic of Kazakhstan, 010000 Astana, Kazakhstan
- Department
of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota 55905, United States
| | - Meruyert Imanbekova
- Department
of Biomedical Engineering, University of California, Davis, Davis, California 95616, United States
- National Center for Biotechnology of the Republic of Kazakhstan, 010000 Astana, Kazakhstan
| | - Dong-Sik Shin
- Department
of Biomedical Engineering, University of California, Davis, Davis, California 95616, United States
- Department
of Chemical Engineering, Sookmyung Women’s University, Seoul 140-742, Republic of Korea
| | - Albert Davydov
- Materials
Science and Engineering Division, Materials Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
- Institute
for Research in Electronics and Applied Physics, University of Maryland, College
Park, Maryland 20742, United States
| | - Alexander Revzin
- Department
of Biomedical Engineering, University of California, Davis, Davis, California 95616, United States
- Department
of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota 55905, United States
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180
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181
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Application of aptamers in detection and chromatographic purification of antibiotics in different matrices. Trends Analyt Chem 2017. [DOI: 10.1016/j.trac.2017.07.023] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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182
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Rawson TM, Sharma S, Georgiou P, Holmes A, Cass A, O'Hare D. Towards a minimally invasive device for beta-lactam monitoring in humans. Electrochem commun 2017; 82:1-5. [PMID: 31031564 PMCID: PMC6485621 DOI: 10.1016/j.elecom.2017.07.011] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Antimicrobial resistance is a leading patient safety issue. There is a need to develop novel mechanisms for monitoring and subsequently improving the precision of how we use antibiotics. A surface modified microneedle array was developed for monitoring beta-lactam antibiotic levels in human interstitial fluid. The sensor was fabricated by anodically electrodepositing iridium oxide (AEIROF) onto a platinum surface on the microneedle followed by fixation of beta-lactamase enzyme within a hydrogel. Calibration of the sensor was performed to penicillin-G in buffer solution (PBS) and artificial interstitial fluid (ISF). Further calibration of a platinum disc electrode was undertaken using amoxicillin and ceftriaxone. Open-circuit potentials were performed and data analysed using the Hill equation and log(concentration [M]) plots. The microneedle sensor demonstrated high reproducibility between penicillin-G runs in PBS with mean Km (±1SD) = 0.0044 ± 0.0013 M and mean slope function of log(concentration plots) 29 ± 1.80 mV/decade (r2=0.933). Response was reproducible after 28 days storage at 4°C. In artificial ISF, the sensors response was Km (±1SD) = 0.0077 ± 0.0187 M and a slope function of 34 ± 1.85 mv/decade (r2=0.995). Our results suggest that microneedle array based beta-lactam sensing may be a future application of this AEIROF based enzymatic sensor.
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Affiliation(s)
- Timothy Miles Rawson
- National Institute for Health Research Health Protection Research Unit in Healthcare Associated Infections and Antimicrobial Resistance, Imperial College London, Hammersmith Campus, Du Cane Road, London. W12 0NN. United Kingdom
| | - Sanjiv Sharma
- Department of Chemistry & Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, United Kingdom
| | - Pantelis Georgiou
- Department of Electrical and Electronic Engineering, Imperial College London, South Kensington Campus, London, SW7 2AZ, United Kingdom
| | - Alison Holmes
- National Institute for Health Research Health Protection Research Unit in Healthcare Associated Infections and Antimicrobial Resistance, Imperial College London, Hammersmith Campus, Du Cane Road, London. W12 0NN. United Kingdom
- Imperial College Healthcare NHS Trust, Hammersmith Hospital, Du Cane Road, Acton, W12 0NN, United Kingdom
| | - Anthony Cass
- Department of Chemistry & Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, United Kingdom
| | - Danny O'Hare
- Department of Bioengineering, Imperial College London, London, SW7 2AZ, United Kingdom
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183
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H. Tom Soh. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201702763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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184
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H. Tom Soh. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/anie.201702763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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185
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186
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Li H, Dauphin-Ducharme P, Ortega G, Plaxco KW. Calibration-Free Electrochemical Biosensors Supporting Accurate Molecular Measurements Directly in Undiluted Whole Blood. J Am Chem Soc 2017; 139:11207-11213. [PMID: 28712286 DOI: 10.1021/jacs.7b05412] [Citation(s) in RCA: 124] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The need to calibrate to correct for sensor-to-sensor fabrication variation and sensor drift has proven a significant hurdle in the widespread use of biosensors. To maintain clinically relevant (±20% for this application) accuracy, for example, commercial continuous glucose monitors require recalibration several times a day, decreasing convenience and increasing the chance of user errors. Here, however, we demonstrate a "dual-frequency" approach for achieving the calibration-free operation of electrochemical biosensors that generate an output by using square-wave voltammetry to monitor binding-induced changes in electron transfer kinetics. Specifically, we use the square-wave frequency dependence of their response to produce a ratiometric signal, the ratio of peak currents collected at responsive and non- (or low) responsive square-wave frequencies, which is largely insensitive to drift and sensor-to-sensor fabrication variations. Using electrochemical aptamer-based (E-AB) biosensors as our test bed, we demonstrate the accurate and precise operation of sensors against multiple drugs, achieving accuracy in the measurement of their targets of within better than 20% across dynamic ranges of up to 2 orders of magnitude without the need to calibrate each individual sensor.
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Affiliation(s)
- Hui Li
- Faculty of Materials Science and Chemistry, China University of Geosciences , Wuhan 430074, China.,Department of Chemistry and Biochemistry, University of California Santa Barbara , Santa Barbara, California 93106, United States.,Center for Bioengineering, University of California Santa Barbara , Santa Barbara, California 93106, United States
| | - Philippe Dauphin-Ducharme
- Department of Chemistry and Biochemistry, University of California Santa Barbara , Santa Barbara, California 93106, United States.,Center for Bioengineering, University of California Santa Barbara , Santa Barbara, California 93106, United States
| | - Gabriel Ortega
- Department of Chemistry and Biochemistry, University of California Santa Barbara , Santa Barbara, California 93106, United States.,Center for Bioengineering, University of California Santa Barbara , Santa Barbara, California 93106, United States.,CIC bioGUNE , Bizkaia Technology Park, Building 801 A, 48170 Derio, Spain
| | - Kevin W Plaxco
- Department of Chemistry and Biochemistry, University of California Santa Barbara , Santa Barbara, California 93106, United States.,Center for Bioengineering, University of California Santa Barbara , Santa Barbara, California 93106, United States
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187
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Affiliation(s)
- P S Olofsson
- Center for Bioelectronic Medicine, Department of Medicine, Center for Molecular Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Solna, Sweden.,Center for Bioelectronic Medicine, The Feinstein Institute for Medical Research, Manhasset, NY, USA
| | - K J Tracey
- Center for Bioelectronic Medicine, The Feinstein Institute for Medical Research, Manhasset, NY, USA
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189
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190
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Matharu Z, Daggumati P, Wang L, Dorofeeva TS, Li Z, Seker E. Nanoporous-Gold-Based Electrode Morphology Libraries for Investigating Structure-Property Relationships in Nucleic Acid Based Electrochemical Biosensors. ACS APPLIED MATERIALS & INTERFACES 2017; 9:12959-12966. [PMID: 28094510 DOI: 10.1021/acsami.6b15212] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Nanoporous gold (np-Au) electrode coatings significantly enhance the performance of electrochemical nucleic acid biosensors because of their three-dimensional nanoscale network, high electrical conductivity, facile surface functionalization, and biocompatibility. Contrary to planar electrodes, the np-Au electrodes also exhibit sensitive detection in the presence of common biofouling media due to their porous structure. However, the pore size of the nanomatrix plays a critical role in dictating the extent of biomolecular capture and transport. Small pores perform better in the case of target detection in complex samples by filtering out the large nonspecific proteins. On the other hand, larger pores increase the accessibility of target nucleic acids in the nanoporous structure, enhancing the detection limits of the sensor at the expense of more interference from biofouling molecules. Here, we report a microfabricated np-Au multiple electrode array that displays a range of electrode morphologies on the same chip for identifying feature sizes that reduce the nonspecific adsorption of proteins but facilitate the permeation of target DNA molecules into the pores. We demonstrate the utility of the electrode morphology library in studying DNA functionalization and target detection in complex biological media with a special emphasis on revealing ranges of electrode morphologies that mutually enhance the limit of detection and biofouling resilience. We expect this technique to assist in the development of high-performance biosensors for point-of-care diagnostics and facilitate studies on the electrode structure-property relationships in potential applications ranging from neural electrodes to catalysts.
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Affiliation(s)
- Zimple Matharu
- Department of Electrical and Computer Engineering and ‡Department of Biomedical Engineering, University of California-Davis , Davis, California 95616, United States
| | - Pallavi Daggumati
- Department of Electrical and Computer Engineering and ‡Department of Biomedical Engineering, University of California-Davis , Davis, California 95616, United States
| | - Ling Wang
- Department of Electrical and Computer Engineering and ‡Department of Biomedical Engineering, University of California-Davis , Davis, California 95616, United States
| | - Tatiana S Dorofeeva
- Department of Electrical and Computer Engineering and ‡Department of Biomedical Engineering, University of California-Davis , Davis, California 95616, United States
| | - Zidong Li
- Department of Electrical and Computer Engineering and ‡Department of Biomedical Engineering, University of California-Davis , Davis, California 95616, United States
| | - Erkin Seker
- Department of Electrical and Computer Engineering and ‡Department of Biomedical Engineering, University of California-Davis , Davis, California 95616, United States
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191
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Taylor IM, Du Z, Bigelow ET, Eles JR, Horner AR, Catt KA, Weber SG, Jamieson BG, Cui XT. Aptamer-functionalized neural recording electrodes for the direct measurement of cocaine in vivo. J Mater Chem B 2017; 5:2445-2458. [PMID: 28729901 PMCID: PMC5512874 DOI: 10.1039/c7tb00095b] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cocaine is a highly addictive psychostimulant that acts through competitive inhibition of the dopamine transporter. In order to fully understand the region specific neuropathology of cocaine abuse and addiction, it is unequivocally necessary to develop cocaine sensing technology capable of directly measuring real-time cocaine transient events local to different brain regions throughout the pharmacokinetic time course of exposure. We have developed an electrochemical aptamer-based in vivo cocaine sensor on a silicon based neural recording probe platform capable of directly measuring cocaine from discrete brain locations using square wave voltammetry (SWV). The sensitivity of the sensor for cocaine follows a modified exponential Langmuir model relationship and complete aptamer-target binding occurs in < 2 sec and unbinding in < 4 sec. The resulting temporal resolution is a 75X increase from traditional microdialysis sampling methods. When implanted in the rat dorsal striatum, the cocaine sensor exhibits stable SWV signal drift (modeled using a logarithmic exponential equation) and is capable of measuring real-time in vivo response to repeated local cocaine infusion as well as systemic IV cocaine injection. The in vivo sensor is capable of obtaining reproducible measurements over a period approaching 3 hours, after which signal amplitude significantly decreases likely due to tissue encapsulation. Finally, aptamer functionalized neural recording probes successfully detect spontaneous and evoked neural activity in the brain. This dual functionality makes the cocaine sensor a powerful tool capable of monitoring both biochemical and electrophysiological signals with high spatial and temporal resolution.
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Affiliation(s)
- I. Mitch Taylor
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Zhanhong Du
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15261, USA
- Shenzhen Key Lab of Neuropsychiatric Modulation and Collaborative Innovation Center for Brain Science, CAS Center for Excellence in Brain Science, Shenzhen Institute of Advanced Technologies, Chinese Academy of Sciences, Shenzhen, 518055, China
| | | | - James R. Eles
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Anthony R. Horner
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Kasey A. Catt
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Stephen G. Weber
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | | | - X. Tracy Cui
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15261, USA
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192
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Li H, Dauphin-Ducharme P, Arroyo-Currás N, Tran CH, Vieira PA, Li S, Shin C, Somerson J, Kippin TE, Plaxco KW. A Biomimetic Phosphatidylcholine-Terminated Monolayer Greatly Improves the In Vivo Performance of Electrochemical Aptamer-Based Sensors. Angew Chem Int Ed Engl 2017; 56:7492-7495. [PMID: 28371090 DOI: 10.1002/anie.201700748] [Citation(s) in RCA: 97] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2017] [Indexed: 12/11/2022]
Abstract
The real-time monitoring of specific analytes in situ in the living body would greatly advance our understanding of physiology and the development of personalized medicine. Because they are continuous (wash-free and reagentless) and are able to work in complex media (e.g., undiluted serum), electrochemical aptamer-based (E-AB) sensors are promising candidates to fill this role. E-AB sensors suffer, however, from often-severe baseline drift when deployed in undiluted whole blood either in vitro or in vivo. We demonstrate that cell-membrane-mimicking phosphatidylcholine (PC)-terminated monolayers improve the performance of E-AB sensors, reducing the baseline drift from around 70 % to just a few percent after several hours in flowing whole blood in vitro. With this improvement comes the ability to deploy E-AB sensors directly in situ in the veins of live animals, achieving micromolar precision over many hours without the use of physical barriers or active drift-correction algorithms.
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Affiliation(s)
- Hui Li
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, CA, 93106, USA
| | - Philippe Dauphin-Ducharme
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, CA, 93106, USA
| | | | - Claire H Tran
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, CA, 93106, USA
| | - Philip A Vieira
- Department of Psychology, California State University, Dominguez Hills, 1000 E. Victoria Ave., Carson, CA, 90747, USA
| | - Shaoguang Li
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, CA, 93106, USA
| | - Christina Shin
- Department of Psychological and Brain Sciences, University of California Santa Barbara, Santa Barbara, CA, 93106, USA.,The Neuroscience Research Institute and Department of Molecular Cellular and Developmental Biology, University of California Santa Barbara, Santa Barbara, CA, 93106, USA
| | - Jacob Somerson
- Interdepartmental Program, Biomolecular Science and Engineering, University of California Santa Barbara, Santa Barbara, CA, 93106, USA
| | - Tod E Kippin
- Department of Psychological and Brain Sciences, University of California Santa Barbara, Santa Barbara, CA, 93106, USA.,The Neuroscience Research Institute and Department of Molecular Cellular and Developmental Biology, University of California Santa Barbara, Santa Barbara, CA, 93106, USA
| | - Kevin W Plaxco
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, CA, 93106, USA.,Center for Bioengineering, University of California Santa Barbara, Santa Barbara, CA, 93106, USA
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193
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Li H, Dauphin‐Ducharme P, Arroyo‐Currás N, Tran CH, Vieira PA, Li S, Shin C, Somerson J, Kippin TE, Plaxco KW. A Biomimetic Phosphatidylcholine‐Terminated Monolayer Greatly Improves the In Vivo Performance of Electrochemical Aptamer‐Based Sensors. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201700748] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Hui Li
- Department of Chemistry and Biochemistry University of California Santa Barbara Santa Barbara CA 93106 USA
| | - Philippe Dauphin‐Ducharme
- Department of Chemistry and Biochemistry University of California Santa Barbara Santa Barbara CA 93106 USA
| | | | - Claire H. Tran
- Department of Chemistry and Biochemistry University of California Santa Barbara Santa Barbara CA 93106 USA
| | - Philip A. Vieira
- Department of Psychology California State University Dominguez Hills, 1000 E. Victoria Ave. Carson CA 90747 USA
| | - Shaoguang Li
- Department of Chemistry and Biochemistry University of California Santa Barbara Santa Barbara CA 93106 USA
| | - Christina Shin
- Department of Psychological and Brain Sciences University of California Santa Barbara Santa Barbara CA 93106 USA
- The Neuroscience Research Institute and Department of Molecular Cellular and Developmental Biology University of California Santa Barbara Santa Barbara CA 93106 USA
| | - Jacob Somerson
- Interdepartmental Program, Biomolecular Science and Engineering University of California Santa Barbara Santa Barbara CA 93106 USA
| | - Tod E. Kippin
- Department of Psychological and Brain Sciences University of California Santa Barbara Santa Barbara CA 93106 USA
- The Neuroscience Research Institute and Department of Molecular Cellular and Developmental Biology University of California Santa Barbara Santa Barbara CA 93106 USA
| | - Kevin W. Plaxco
- Department of Chemistry and Biochemistry University of California Santa Barbara Santa Barbara CA 93106 USA
- Center for Bioengineering University of California Santa Barbara Santa Barbara CA 93106 USA
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194
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Abstract
In vivo biosensors are emerging as powerful tools in biomedical research and diagnostic medicine. Distinct from "labels" or "imaging", in vivo biosensors are designed for continuous and long-term monitoring of target analytes in real biological systems and should be selective, sensitive, reversible and biocompatible. Due to the challenges associated with meeting all of the analytical requirements, we found relatively few reports of research groups demonstrating devices that meet the strict definition in vivo. However, we identified several case studies and a range of emerging materials likely to lead to significant developments in the field.
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Affiliation(s)
- Guoxin Rong
- Department of Pharmaceutical Sciences, Northeastern University, Boston, MA 02115
| | - Simon R. Corrie
- Department of Chemical Engineering, ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash University, Clayton, VIC, 3800, Australia
- Australian Institute for Bioengineering and Nanotechnology, ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of Queensland, St Lucia, QLD, 4072, Australia
| | - Heather A. Clark
- Department of Pharmaceutical Sciences, Northeastern University, Boston, MA 02115
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195
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Aliakbarinodehi N, Jolly P, Bhalla N, Miodek A, De Micheli G, Estrela P, Carrara S. Aptamer-based Field-Effect Biosensor for Tenofovir Detection. Sci Rep 2017; 7:44409. [PMID: 28294122 PMCID: PMC5353720 DOI: 10.1038/srep44409] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Accepted: 02/02/2017] [Indexed: 01/10/2023] Open
Abstract
During medical treatment it is critical to maintain the circulatory concentration of drugs within their therapeutic range. A novel biosensor is presented in this work to address the lack of a reliable point-of-care drug monitoring system in the market. The biosensor incorporates high selectivity and sensitivity by integrating aptamers as the recognition element and field-effect transistors as the signal transducer. The drug tenofovir was used as a model small molecule. The biointerface of the sensor is a binary self-assembled monolayer of specific thiolated aptamer and 6-mercapto-1-hexanol (MCH), whose ratio was optimized by electrochemical impedance spectroscopy measurements to enhance the sensitivity towards the specific target. Surface plasmon resonance, performed under different buffer conditions, shows optimum specific and little non-specific binding in phosphate buffered saline. The dose-response behavior of the field-effect biosensor presents a linear range between 1 nM and 100 nM of tenofovir and a limit of detection of 1.2 nM. Two non-specific drugs and one non-specific aptamer, tested as stringent control candidates, caused negligible responses. The applications were successfully extended to the detection of the drug in human serum. As demonstrated by impedance measurements, the aptamer-based sensors can be used for real-time drug monitoring.
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Affiliation(s)
- N Aliakbarinodehi
- School of Engineering, École Polytechnique Fédérale de Lausanne (EPFL), STI-IEL-LSI2, Building INF, 3rd floor, 1015 Lausanne, Switzerland
| | - P Jolly
- Department of Electronic and Electrical Engineering, University of Bath, Claverton Down, BA2 7AY Bath, United Kingdom
| | - N Bhalla
- Department of Electronic and Electrical Engineering, University of Bath, Claverton Down, BA2 7AY Bath, United Kingdom
| | - A Miodek
- Department of Electronic and Electrical Engineering, University of Bath, Claverton Down, BA2 7AY Bath, United Kingdom
| | - G De Micheli
- School of Engineering, École Polytechnique Fédérale de Lausanne (EPFL), STI-IEL-LSI2, Building INF, 3rd floor, 1015 Lausanne, Switzerland
| | - P Estrela
- Department of Electronic and Electrical Engineering, University of Bath, Claverton Down, BA2 7AY Bath, United Kingdom
| | - S Carrara
- School of Engineering, École Polytechnique Fédérale de Lausanne (EPFL), STI-IEL-LSI2, Building INF, 3rd floor, 1015 Lausanne, Switzerland
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196
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Plourde K, Derbali RM, Desrosiers A, Dubath C, Vallée-Bélisle A, Leblond J. Aptamer-based liposomes improve specific drug loading and release. J Control Release 2017; 251:82-91. [PMID: 28238787 DOI: 10.1016/j.jconrel.2017.02.026] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Revised: 01/27/2017] [Accepted: 02/07/2017] [Indexed: 01/02/2023]
Abstract
Aptamer technology has shown much promise in cancer therapeutics for its targeting abilities. However, its potential to improve drug loading and release from nanocarriers has not been thoroughly explored. In this study, we employed drug-binding aptamers to actively load drugs into liposomes. We designed a series of DNA aptamer sequences specific to doxorubicin, displaying multiple binding sites and various binding affinities. The binding ability of aptamers was preserved when incorporated into cationic liposomes, binding up to 15equivalents of doxorubicin per aptamer, therefore drawing the drug into liposomes. Optimization of the charge and drug/aptamer ratios resulted in ≥80% encapsulation efficiency of doxorubicin, ten times higher than classical passively-encapsulating liposomal formulations and similar to a pH-gradient active loading strategy. In addition, kinetic release profiles and cytotoxicity assay on HeLa cells demonstrated that the release and therapeutic efficacy of liposomal doxorubicin could be controlled by the aptamer's structure. Our results suggest that the aptamer exhibiting a specific intermediate affinity is the best suited to achieve high drug loading while maintaining efficient drug release and therapeutic activity. This strategy was successfully applied to tobramycin, a hydrophilic drug suffering from low encapsulation into liposomes, where its loading was improved six-fold using aptamers. Overall, we demonstrate that aptamers could act, in addition to their targeting properties, as multifunctional excipients for liposomal formulations.
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Affiliation(s)
- Kevin Plourde
- Faculty of Pharmacy, University of Montreal, QC H3T 1J4, Canada
| | | | | | - Céline Dubath
- Faculty of Pharmacy, University of Montreal, QC H3T 1J4, Canada
| | | | - Jeanne Leblond
- Faculty of Pharmacy, University of Montreal, QC H3T 1J4, Canada.
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Desrosiers A, Vallée-Bélisle A. Nature-inspired DNA switches: applications in medicine. Nanomedicine (Lond) 2017; 12:175-179. [DOI: 10.2217/nnm-2016-0349] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Affiliation(s)
- Arnaud Desrosiers
- Laboratory of Biosensors & Nanomachines, Département de Chimie, Université de Montréal, Québec, Canada
- Département de Biochimie et Médecine Moléculaire, Université de Montréal, C.P. 6128, Succursale Centre-ville, Montréal, Québec H3C 3J7, Canada
| | - Alexis Vallée-Bélisle
- Laboratory of Biosensors & Nanomachines, Département de Chimie, Université de Montréal, Québec, Canada
- Département de Biochimie et Médecine Moléculaire, Université de Montréal, C.P. 6128, Succursale Centre-ville, Montréal, Québec H3C 3J7, Canada
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198
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Jett SE, Bonham AJ. Reusable Electrochemical DNA Biosensor for the Detection of Waterborne Uranium. ChemElectroChem 2017. [DOI: 10.1002/celc.201600617] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Susan E. Jett
- Department of Chemistry; Metropolitan State University of Denver; 1201 5th St Denver CO 80204 USA
| | - Andrew J. Bonham
- Department of Chemistry; Metropolitan State University of Denver; 1201 5th St Denver CO 80204 USA
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199
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Real-time measurement of small molecules directly in awake, ambulatory animals. Proc Natl Acad Sci U S A 2017; 114:645-650. [PMID: 28069939 DOI: 10.1073/pnas.1613458114] [Citation(s) in RCA: 238] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The development of a technology capable of tracking the levels of drugs, metabolites, and biomarkers in the body continuously and in real time would advance our understanding of health and our ability to detect and treat disease. It would, for example, enable therapies guided by high-resolution, patient-specific pharmacokinetics (including feedback-controlled drug delivery), opening new dimensions in personalized medicine. In response, we demonstrate here the ability of electrochemical aptamer-based (E-AB) sensors to support continuous, real-time, multihour measurements when emplaced directly in the circulatory systems of living animals. Specifically, we have used E-AB sensors to perform the multihour, real-time measurement of four drugs in the bloodstream of even awake, ambulatory rats, achieving precise molecular measurements at clinically relevant detection limits and high (3 s) temporal resolution, attributes suggesting that the approach could provide an important window into the study of physiology and pharmacokinetics.
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Price J. What Can Big Data Offer the Pharmacovigilance of Orphan Drugs? Clin Ther 2016; 38:2533-2545. [PMID: 27914633 DOI: 10.1016/j.clinthera.2016.11.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Accepted: 11/07/2016] [Indexed: 12/18/2022]
Abstract
The pharmacovigilance of drugs for orphan diseases presents problems related to the small patient population. Obtaining high-quality information on individual reports of suspected adverse reactions is of particular importance for the pharmacovigilance of orphan drugs. The possibility of mining "big data" to detect suspected adverse reactions is being explored in pharmacovigilance generally but may have limited application to orphan drugs. Sources of big data such as social media may be infrequently used as communication channels by patients with rare disease or their caregivers or by health care providers; any adverse reactions identified are likely to reflect what is already known about the safety of the drug from the network of support that grows up around these patients. Opportunities related to potential future big data sources are discussed.
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Affiliation(s)
- John Price
- Alexion Pharmaceuticals, Inc, New Haven, Connecticut.
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