1
|
Hristov DR, Rodriguez-Quijada C, Gomez-Marquez J, Hamad-Schifferli K. Designing Paper-Based Immunoassays for Biomedical Applications. SENSORS (BASEL, SWITZERLAND) 2019; 19:E554. [PMID: 30699964 PMCID: PMC6387326 DOI: 10.3390/s19030554] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Revised: 01/14/2019] [Accepted: 01/21/2019] [Indexed: 12/18/2022]
Abstract
Paper-based sensors and assays have been highly attractive for numerous biological applications, including rapid diagnostics and assays for disease detection, food safety, and clinical care. In particular, the paper immunoassay has helped drive many applications in global health due to its low cost and simplicity of operation. This review is aimed at examining the fundamentals of the technology, as well as different implementations of paper-based assays and discuss novel strategies for improving their sensitivity, performance, or enabling new capabilities. These innovations can be categorized into using unique nanoparticle materials and structures for detection via different techniques, novel biological species for recognizing biomarkers, or innovative device design and/or architecture.
Collapse
Affiliation(s)
- Delyan R Hristov
- Department of Engineering, University of Massachusetts, Boston, MA 02125, USA.
| | | | - Jose Gomez-Marquez
- Little Devices Lab, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
| | | |
Collapse
|
2
|
Pinalli R, Pedrini A, Dalcanale E. Biochemical sensing with macrocyclic receptors. Chem Soc Rev 2018; 47:7006-7026. [PMID: 30175351 DOI: 10.1039/c8cs00271a] [Citation(s) in RCA: 107] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Preventive healthcare asks for the development of cheap, precise and non-invasive sensor devices for the early detection of diseases and continuous population screening. The actual techniques used for diagnosis, e.g. MRI and PET, or for biochemical marker sensing, e.g. immunoassays, are not suitable for continuous monitoring since they are expensive and prone to false positive responses. Synthetic supramolecular receptors offer new opportunities for the creation of specific, selective and cheap sensor devices for biological sensing of specific target molecules in complex mixtures of organic substances. The fundamental challenges faced in developing such devices are the precise transfer of the molecular recognition events at the solid-liquid interface and its transduction into a readable signal. In this review we present the progress made so far in turning synthetic macrocyclic hosts, namely cyclodextrins, calixarenes, cucurbiturils and cavitands, into effective biochemical sensors and the strategies utilized to solve the above mentioned issues. The performances of the developed sensing devices based on these receptors in detecting specific biological molecules, drugs and proteins are critically discussed.
Collapse
Affiliation(s)
- Roberta Pinalli
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parco Area delle Scienze 17/A, 43124 Parma, Italy.
| | | | | |
Collapse
|
3
|
Zhang F, Jing W, Hunt A, Yu H, Yang Y, Wang S, Chen HY, Tao N. Label-Free Quantification of Small-Molecule Binding to Membrane Proteins on Single Cells by Tracking Nanometer-Scale Cellular Membrane Deformation. ACS NANO 2018; 12:2056-2064. [PMID: 29397682 PMCID: PMC5851003 DOI: 10.1021/acsnano.8b00235] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Measuring molecular binding to membrane proteins is critical for understanding cellular functions, validating biomarkers, and screening drugs. Despite the importance, developing such a capability has been a difficult challenge, especially for small-molecule binding to membrane proteins in their native cellular environment. Here we show that the binding of both large and small molecules to membrane proteins can be quantified on single cells by trapping single cells with a microfluidic device and detecting binding-induced cellular membrane deformation on the nanometer scale with label-free optical imaging. We develop a thermodynamic model to describe the binding-induced membrane deformation, validate the model by examining the dependence of membrane deformation on cell stiffness, membrane protein expression level, and binding affinity, and study four major types of membrane proteins, including glycoproteins, ion channels, G-protein coupled receptors, and tyrosine kinase receptors. The single-cell detection capability reveals the importance of local membrane environment on molecular binding and variability in the binding kinetics of different cell lines and heterogeneity of different cells within the same cell line.
Collapse
Affiliation(s)
- Fenni Zhang
- Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University, Tempe, AZ 85287, USA
- School of Electrical Computer and Energy Engineering, Arizona State University, Tempe, Arizona 85287, USA
| | - Wenwen Jing
- Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University, Tempe, AZ 85287, USA
| | - Ashley Hunt
- Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University, Tempe, AZ 85287, USA
| | - Hui Yu
- Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University, Tempe, AZ 85287, USA
| | - Yunze Yang
- Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University, Tempe, AZ 85287, USA
- School of Electrical Computer and Energy Engineering, Arizona State University, Tempe, Arizona 85287, USA
| | - Shaopeng Wang
- Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University, Tempe, AZ 85287, USA
| | - Hong-Yuan Chen
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Nongjian Tao
- Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University, Tempe, AZ 85287, USA
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
- School of Electrical Computer and Energy Engineering, Arizona State University, Tempe, Arizona 85287, USA
| |
Collapse
|
4
|
Rodriguez-Quijada C, Sánchez-Purrà M, de Puig H, Hamad-Schifferli K. Physical Properties of Biomolecules at the Nanomaterial Interface. J Phys Chem B 2018; 122:2827-2840. [DOI: 10.1021/acs.jpcb.8b00168] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
| | - Maria Sánchez-Purrà
- Department of Engineering, University of Massachusetts, Boston, Massachusetts 02125, United States
| | - Helena de Puig
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Kimberly Hamad-Schifferli
- Department of Engineering, University of Massachusetts, Boston, Massachusetts 02125, United States
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| |
Collapse
|
5
|
de Puig H, Bosch I, Carré-Camps M, Hamad-Schifferli K. Effect of the Protein Corona on Antibody-Antigen Binding in Nanoparticle Sandwich Immunoassays. Bioconjug Chem 2016; 28:230-238. [PMID: 28095684 DOI: 10.1021/acs.bioconjchem.6b00523] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We investigated the effect of the protein corona on the function of nanoparticle (NP) antibody (Ab) conjugates in dipstick sandwich immunoassays. Ab specific for Zika virus nonstructural protein 1 (NS1) were conjugated to gold NPs, and another anti-NS1 Ab was immobilized onto the nitrocellulose membrane. Sandwich immunoassay formation was influenced by whether the strip was run in corona forming conditions, i.e., in human serum. Strips run in buffer or pure solutions of bovine serum albumin exhibited false positives, but those run in human serum did not. Serum pretreatment of the nitrocellulose also eliminated false positives. Corona formation around the NP-Ab in serum was faster than the immunoassay time scale. Langmuir binding analysis determined how the immobilized Ab affinity for the NP-Ab/NS1 was impacted by corona formation conditions, quantified as an effective dissociation constant, KDeff. Results show that corona formation mediates the specificity and sensitivity of the antibody-antigen interaction of Zika biomarkers in immunoassays, and plays a critical but beneficial role.
Collapse
Affiliation(s)
| | | | - Marc Carré-Camps
- Department of Chemical Engineering, Institut Quimic de Sarria, Universitat Ramon Llull , Via Augusta 390, 08017 Barcelona, Spain
| | - Kimberly Hamad-Schifferli
- Department of Engineering, University of Massachusetts Boston , Boston, Massachusetts 02125, United States
| |
Collapse
|
6
|
Biavardi E, Federici S, Tudisco C, Menozzi D, Massera C, Sottini A, Condorelli GG, Bergese P, Dalcanale E. Cavitand-Grafted Silicon Microcantilevers as a Universal Probe for Illicit and Designer Drugs in Water. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201404774] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
7
|
Biavardi E, Federici S, Tudisco C, Menozzi D, Massera C, Sottini A, Condorelli GG, Bergese P, Dalcanale E. Cavitand-grafted silicon microcantilevers as a universal probe for illicit and designer drugs in water. Angew Chem Int Ed Engl 2014; 53:9183-8. [PMID: 24909594 DOI: 10.1002/anie.201404774] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Indexed: 02/04/2023]
Abstract
The direct, clean, and unbiased transduction of molecular recognition into a readable and reproducible response is the biggest challenge associated to the use of synthetic receptors in sensing. All possible solutions demand the mastering of molecular recognition at the solid-liquid interface as prerequisite. The socially relevant issue of screening amine-based illicit and designer drugs is addressed by nanomechanical recognition at the silicon-water interface. The methylamino moieties of different drugs are all first recognized by a single cavitand receptor through a synergistic set of weak interactions. The peculiar recognition ability of the cavitand is then transferred with high fidelity and robustness on silicon microcantilevers and harnessed to realize a nanomechanical device for label-free detection of these drugs in water.
Collapse
Affiliation(s)
- Elisa Biavardi
- Dipartimento di Chimica, Università degli Studi di Parma and INSTM Udr Parma, Parco Area delle Scienze 17A, 43124 Parma (Italy)
| | | | | | | | | | | | | | | | | |
Collapse
|
8
|
Abstract
Molecular recognition is a recurrent theme in chemical sensing because of the importance of selectivity for sensor performances. The popularity of molecular recognition in chemical sensing has resulted from the progress made in mastering weak interactions, which has enabled the design of synthetic receptors according to the analyte to be detected. However, the availability of a large pool of modular synthetic receptors so far has not had a significant impact on sensors used in the real world. This technological gap has emerged because of the difficulties in transferring the intrinsic molecular recognition properties of a given receptor from solution to interfaces and in finding high fidelity transduction modes for the recognition event. This Account focuses on the ways to overcome these two bottlenecks, and we recount our recent efforts to produce highly selective supramolecular sensors using phosphonate cavitands as receptors. Through two examples, we present an overview of the different operating strategies that are implemented depending on whether the interface is vapor-solid or liquid-solid. First we describe the selective detection of short chain aliphatic alcohols in the vapor phase. In this example, we solved a key issue common to all sensors for organic vapors: the dissection of the specific interaction (between cavitand and the alcohol) from ubiquitous nonspecific dispersion interactions (between the analytes and interferents in the solid layer). We removed responses resulting from the nonspecific interactions of the analytes with interferents by directly connecting the recognition event at the interface to the transduction mechanism (photoinduced charge transfer). The second example addresses the specific detection of sarcosine in urine. Recent research has suggested that sarcosine can serve as reliable biomarker of the aggressive forms of prostate cancer. Tetraphosphonate cavitands can complex N-methyl ammonium salts with impressive selectivity in solution, and we used this property as a starting point. The sensor implementation requires that we first graft the cavitand onto silicon and gold surfaces as monolayers. The exclusive recognition of sarcosine by these supramolecular sensors originates from their operation in aqueous environments, where synergistic multiple interactions with the phosphonate cavitand are possible only for N-methyl ammonium derivatives. We couple that selectivity with detection modes that probe the strength of the complexation either directly (microcantilever) or via exchange with molecules that have comparable affinity for the cavity (fluorescence dye displacement).
Collapse
Affiliation(s)
- Roberta Pinalli
- Dipartimento di Chimica and INSTM, UdR Parma, Università di Parma, Parco Area delle Scienze 17/A, 43124 Parma, Italy
| | - Enrico Dalcanale
- Dipartimento di Chimica and INSTM, UdR Parma, Università di Parma, Parco Area delle Scienze 17/A, 43124 Parma, Italy
| |
Collapse
|
9
|
Wang B, Huang F, Nguyen T, Xu Y, Lin Q. Microcantilever-Based Label-Free Characterization of Temperature-Dependent Biomolecular Affinity Binding. SENSORS AND ACTUATORS. B, CHEMICAL 2013; 176:653-659. [PMID: 24723743 PMCID: PMC3979549 DOI: 10.1016/j.snb.2012.02.045] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
This paper presents label-free characterization of temperature-dependent biomolecular affinity binding on solid surfaces using a microcantilever-based device. The device consists of a Parylene cantilever one side of which is coated with a gold film and functionalized with molecules as an affinity receptor to a target analyte. The cantilever is located in a poly(dimethylsiloxane) (PDMS) microfluidic chamber that is integrated with a transparent indium tin oxide (ITO) resistive temperature sensor on the underlying substrate. The ITO sensor allows for real-time measurements of the chamber temperature, as well as unobstructed optical access for reflection-based optical detection of the cantilever deflection. To test the temperature-dependent binding between the target and receptor, the temperature of the chamber is maintained at a constant setpoint, while a solution of unlabeled analyte molecules is continuously infused through the chamber. The measured cantilever deflection is used to determine the target-receptor binding characteristics. We demonstrate label-free characterization of temperature-dependent binding kinetics of the platelet-derived growth factor (PDGF) protein with an aptamer receptor. Affinity binding properties including the association and dissociation rate constants as well as equilibrium dissociation constant are obtained, and shown to exhibit significant dependencies on temperature.
Collapse
Affiliation(s)
- Bin Wang
- Department of Mechanical Engineering, Columbia University, New York, USA
| | - Fengliang Huang
- Department of Mechanical Engineering, Columbia University, New York, USA
- School of Electrical & Automation Engineering, Nanjing Normal University, Nanjing, China
| | - ThaiHuu Nguyen
- Department of Mechanical Engineering, Columbia University, New York, USA
| | - Yong Xu
- Department of Electrical and Computer Engineering, Wayne State University, Detroit, USA
| | - Qiao Lin
- Department of Mechanical Engineering, Columbia University, New York, USA
| |
Collapse
|
10
|
Maiolo D, Mitola S, Leali D, Oliviero G, Ravelli C, Bugatti A, Depero LE, Presta M, Bergese P. Role of nanomechanics in canonical and noncanonical pro-angiogenic ligand/VEGF receptor-2 activation. J Am Chem Soc 2012; 134:14573-9. [PMID: 22860754 DOI: 10.1021/ja305816p] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Vascular endothelial growth factor receptor-2 (VEGFR2) is an endothelial cell receptor that plays a pivotal role in physiologic and pathologic angiogenesis and is a therapeutic target for angiogenesis-dependent diseases, including cancer. By leveraging on a dedicated nanomechanical biosensor, we investigated the nanoscale mechanical phenomena intertwined with VEGFR2 surface recognition by its prototypic ligand VEGF-A and its noncanonical ligand gremlin. We found that the two ligands bind the immobilized extracellular domain of VEGFR2 (sVEGFR2) with comparable binding affinity. Nevertheless, they interact with sVEGFR2 with different binding kinetics and drive different in-plane piconewton intermolecular forces, suggesting that the binding of VEGF-A or gremlin induces different conformational changes in sVEGFR2. These behaviors can be effectively described in terms of a different "nanomechanical affinity" of the two ligands for sVEGFR2, about 16-fold higher for VEGF-A with respect to gremlin. Such nanomechanical differences affect the biological activity driven by the two angiogenic factors in endothelial cells, as evidenced by a more rapid VEGFR2 clustering and a more potent mitogenic response triggered by VEGF-A in respect to gremlin. Together, these data point to surface intermolecular interactions on cell membrane between activated receptors as a key modulator of the intracellular signaling cascade.
Collapse
Affiliation(s)
- Daniele Maiolo
- Chemistry for Technologies Laboratory and INSTM, School of Engineering, University of Brescia, Via Branze, 38, 25123 Brescia, Italy
| | | | | | | | | | | | | | | | | |
Collapse
|
11
|
Federici S, Oliviero G, Maiolo D, Depero LE, Colombo I, Bergese P. On the thermodynamics of biomolecule surface transformations. J Colloid Interface Sci 2012; 375:1-11. [DOI: 10.1016/j.jcis.2012.02.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2011] [Revised: 02/03/2012] [Accepted: 02/04/2012] [Indexed: 02/06/2023]
|
12
|
Dionisio M, Oliviero G, Menozzi D, Federici S, Yebeutchou RM, Schmidtchen FP, Dalcanale E, Bergese P. Nanomechanical Recognition of N-Methylammonium Salts. J Am Chem Soc 2012; 134:2392-8. [DOI: 10.1021/ja210567k] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Marco Dionisio
- Department of Organic and Industrial
Chemistry, University of Parma, and INSTM, UdR Parma, Parco Area delle Scienze 17A, 43124 Parma, Italy
| | - Giulio Oliviero
- Chemistry for Technologies Laboratory, University of Brescia, Via Branze 38, 25123 Brescia,
Italy
| | - Daniela Menozzi
- Department of Organic and Industrial
Chemistry, University of Parma, and INSTM, UdR Parma, Parco Area delle Scienze 17A, 43124 Parma, Italy
| | - Stefania Federici
- Chemistry for Technologies Laboratory, University of Brescia, Via Branze 38, 25123 Brescia,
Italy
| | - Roger M. Yebeutchou
- Department of Organic and Industrial
Chemistry, University of Parma, and INSTM, UdR Parma, Parco Area delle Scienze 17A, 43124 Parma, Italy
| | | | - Enrico Dalcanale
- Department of Organic and Industrial
Chemistry, University of Parma, and INSTM, UdR Parma, Parco Area delle Scienze 17A, 43124 Parma, Italy
| | - Paolo Bergese
- Chemistry for Technologies Laboratory, University of Brescia, Via Branze 38, 25123 Brescia,
Italy
| |
Collapse
|
13
|
de Puig H, Federici S, Baxamusa SH, Bergese P, Hamad-Schifferli K. Quantifying the nanomachinery of the nanoparticle-biomolecule interface. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2011; 7:2477-84. [PMID: 21692181 DOI: 10.1002/smll.201100530] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2011] [Indexed: 05/21/2023]
Abstract
A study is presented of the nanomechanical phenomena experienced by nanoparticle-conjugated biomolecules. A thermodynamic framework is developed to describe the binding of thrombin-binding aptamer (TBA) to thrombin when the TBA is conjugated to nanorods. Binding results in nanorod aggregation (viz. directed self-assembly), which is detectable by absorption spectroscopy. The analysis introduces the energy of aggregation, separating it into TBA-thrombin recognition and surface-work contributions. Consequently, it is demonstrated that self-assembly is driven by the interplay of surface work and thrombin-TBA recognition. It is shown that the work at the surface is about -10 kJ mol(-1) and results from the accumulation of in-plane molecular forces of pN magnitude and with a lifetime of <1 s, which arises from TBA nanoscale rearrangements fuelled by thrombin-directed nanorod aggregation. The obtained surface work can map aggregation regimes as a function of different nanoparticle surface conditions. Also, the thermodynamic treatment can be used to obtain quantitative information on surface effects impacting biomolecules on nanoparticle surfaces.
Collapse
Affiliation(s)
- Helena de Puig
- Department of Biological Engineering and the Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA, 02139, USA; Institut Quimic de Sarrià, Universitat Ramon Llull Via Augusta 390, 08017 Barcelona, Spain
| | | | | | | | | |
Collapse
|
14
|
Oliviero G, Federici S, Colombi P, Bergese P. On the difference of equilibrium constants of DNA hybridization in bulk solution and at the solid-solution interface. J Mol Recognit 2011; 24:182-7. [DOI: 10.1002/jmr.1019] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
|
15
|
Federici S, Oliviero G, Hamad-Schifferli K, Bergese P. Protein thin film machines. NANOSCALE 2010; 2:2570-2574. [PMID: 20936224 DOI: 10.1039/c0nr00616e] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We report the first example of microcantilever beams that are reversibly driven by protein thin film machines fueled by cycling the salt concentration of the surrounding solution. We also show that upon the same salinity stimulus the drive can be completely reversed in its direction by introducing a surface coating ligand. Experimental results are throughout discussed within a general yet simple thermodynamic model.
Collapse
Affiliation(s)
- Stefania Federici
- Chemistry for Technologies Laboratory and INSTM, University of Brescia, Via Branze, 38, 25123, Brescia, Italy
| | | | | | | |
Collapse
|
16
|
Nanoliter contact angle probes tumor angiogenic ligand–receptor protein interactions. Biosens Bioelectron 2010; 26:1571-5. [DOI: 10.1016/j.bios.2010.07.115] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2010] [Revised: 07/23/2010] [Accepted: 07/29/2010] [Indexed: 01/16/2023]
|
17
|
Liu KW, Biswal SL. Using Microcantilevers to Study the Interactions of Lipid Bilayers with Solid Surfaces. Anal Chem 2010; 82:7527-32. [DOI: 10.1021/ac100083v] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kai-Wei Liu
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005
| | - Sibani Lisa Biswal
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005
| |
Collapse
|
18
|
Gong P, Wang K, Liu Y, Shepard K, Levicky R. Molecular mechanisms in morpholino-DNA surface hybridization. J Am Chem Soc 2010; 132:9663-71. [PMID: 20572663 PMCID: PMC2920048 DOI: 10.1021/ja100881a] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Synthetic nucleic acid mimics provide opportunity for redesigning the specificity and affinity of hybridization with natural DNA or RNA. Such redesign is of great interest for diagnostic applications where it can enhance the desired signal against a background of competing interactions. This report compares hybridization of DNA analyte strands with morpholinos (MOs), which are uncharged nucleic acid mimics, to the corresponding DNA-DNA case in solution and on surfaces. In solution, MO-DNA hybridization is found to be independent of counterion concentration, in contrast to DNA-DNA hybridization. On surfaces, when immobilized MO or DNA "probe" strands hybridize with complementary DNA "targets" from solution, both the MO-DNA and DNA-DNA processes depend on ionic strength but exhibit qualitatively different behaviors. At lower ionic strengths, MO-DNA surface hybridization exhibits hallmarks of kinetic limitations when separation between hybridized probe sites becomes comparable to target dimensions, whereas extents of DNA-DNA surface hybridization are instead consistent with limits imposed by buildup of surface (Donnan) potential. The two processes also fundamentally differ at high ionic strength, under conditions when electrostatic effects are weak. Here, variations in probe coverage have a much diminished impact on MO-DNA than on DNA-DNA hybridization for similarly crowded surface conditions. These various observations agree with a structural model of MO monolayers in which MO-DNA duplexes segregate to the buffer interface while unhybridized probes localize near the solid support. A general perspective is presented on using uncharged DNA analogues, which also include compounds such as peptide nucleic acids (PNA), in surface hybridization applications.
Collapse
Affiliation(s)
- Ping Gong
- Seventh Sense Biosystems Inc., 101 Binney Street, Cambridge, Massachusetts 02142, USA
| | | | | | | | | |
Collapse
|
19
|
Bergese P, Oliviero G, Colombo I, Depero LE. Molecular recognition by contact angle: proof of concept with DNA hybridization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:4271-4273. [PMID: 19301878 DOI: 10.1021/la900428u] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A molecular recognition reaction supported by a solid-phase assay drives a specific change in the solid-solution interfacial tension. This prompts contact angle (CA) analysis, being a straightforward route to evaluate this property, to play the unedited role of label-free probe of the reaction. The concept is proven by the successful recognition of DNA hybridization and is further supported by the agreement between the results and the underpinning thermodynamics.
Collapse
Affiliation(s)
- Paolo Bergese
- Chemistry for Technologies Laboratory and INSTM, University of Brescia, Via Branze 38, 25123 Brescia, Italy.
| | | | | | | |
Collapse
|
20
|
A biofunctional polymeric coating for microcantilever molecular recognition. Anal Chim Acta 2008; 630:161-7. [DOI: 10.1016/j.aca.2008.09.069] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2008] [Revised: 09/23/2008] [Accepted: 09/27/2008] [Indexed: 11/21/2022]
|