1
|
Froehlich CE, He J, Haynes CL. Investigation of Charged Small Molecule-Aptamer Interactions with Surface Plasmon Resonance. Anal Chem 2023; 95:2639-2644. [PMID: 36704862 DOI: 10.1021/acs.analchem.2c04192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Investigating the interactions between small, charged molecules and aptamers using surface plasmon resonance (SPR) is limited by the inherent low response of small molecules and difficulties with nonspecific electrostatic interactions between the aptamer, analyte, and sensor surface. However, aptamers are increasingly being used in sensors for small molecule detection in critical areas like healthcare and environmental safety. The ability to probe these interactions through simple, direct SPR assays would be greatly beneficial and allow for the development of improved sensors without the need for complicated signal enhancement. However, these assays are nearly nonexistent in the current literature and are instead surpassed by sandwich or competitive binding techniques, which require additional sample preparation and reagents. In this work, we develop a method to characterize the interaction between the charged small molecule serotonin (176 Da) and an aptamer with SPR using streptavidin-biotin capture and a high-ionic-strength buffer. Additionally, other methods, such as serotonin immobilization and thiol-coupling of the aptamer, were investigated for comparison. These techniques give insight into working with small molecules and allow for quickly adapting a binding affinity assay into a direct SPR sensor.
Collapse
|
2
|
Wacogne B, Vaccari N, Koubevi C, Belinger-Podevin M, Robert-Nicoud M, Rouleau A, Frelet-Barrand A. Absorption Spectra Description for T-Cell Concentrations Determination and Simultaneous Measurements of Species during Co-Cultures. SENSORS (BASEL, SWITZERLAND) 2022; 22:s22239223. [PMID: 36501924 PMCID: PMC9738982 DOI: 10.3390/s22239223] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 11/18/2022] [Accepted: 11/23/2022] [Indexed: 05/27/2023]
Abstract
Advanced Therapy Medicinal Products are promising drugs for patients in therapeutic impasses. Their complex fabrication process implies regular quality controls to monitor cell concentration. Among the different methods available, optical techniques offer several advantages. Our study aims to measure cell concentration in real time in a potential closed-loop environment using white light spectroscopy and to test the possibility of simultaneously measuring concentrations of several species. By analyzing the shapes of the absorption spectra, this system allowed the quantification of T-cells with an accuracy of about 3% during 30 h of cultivation monitoring and 26 h of doubling time, coherent with what is expected for normal cell culture. Moreover, our system permitted concentration measurements for two species in reconstructed co-cultures of T-cells and Candida albicans yeasts. This method can now be applied to any single or co-culture, it allows real-time monitoring, and can be easily integrated into a closed system.
Collapse
Affiliation(s)
- Bruno Wacogne
- FEMTO-ST Institute, University of Bourgogne Franche-Comté, CNRS, 15B Avenue Des Montboucons, 25030 Besançon, France
- INSERM CIC 1431, Besançon University Hospital, 2 Place Saint-Jacques, 25030 Besançon, France
| | - Naïs Vaccari
- FEMTO-ST Institute, University of Bourgogne Franche-Comté, CNRS, 15B Avenue Des Montboucons, 25030 Besançon, France
| | - Claudia Koubevi
- FEMTO-ST Institute, University of Bourgogne Franche-Comté, CNRS, 15B Avenue Des Montboucons, 25030 Besançon, France
| | - Marine Belinger-Podevin
- FEMTO-ST Institute, University of Bourgogne Franche-Comté, CNRS, 15B Avenue Des Montboucons, 25030 Besançon, France
| | | | - Alain Rouleau
- FEMTO-ST Institute, University of Bourgogne Franche-Comté, CNRS, 15B Avenue Des Montboucons, 25030 Besançon, France
| | - Annie Frelet-Barrand
- FEMTO-ST Institute, University of Bourgogne Franche-Comté, CNRS, 15B Avenue Des Montboucons, 25030 Besançon, France
| |
Collapse
|
3
|
Cai H, Wang M, Liu J, Wang X. Theoretical and experimental study of a highly sensitive SPR biosensor based on Au grating and Au film coupling structure. OPTICS EXPRESS 2022; 30:26136-26148. [PMID: 36236810 DOI: 10.1364/oe.461768] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Accepted: 06/21/2022] [Indexed: 06/16/2023]
Abstract
A high-sensitivity surface plasmon resonance (SPR) sensor based on the coupling of Au grating and Au film is investigated through simulations and experiments. The SPR sensor is designed by using a hybrid method composed of genetic algorithm (GA) and rigorous coupled wave analysis (RCWA). The numerical results indicate the sensor has an angular sensitivity of 397.3°/RIU (refractive index unit), which is approximately 2.81 times higher than the conventional Au-based sensor and it is verified by experiments. Theoretical analysis, by finite-difference time-domain (FDTD) method, demonstrates the co-coupling between surface plasmon polaritons (SPPs) propagating on the surface of Au film and localized surface plasmons (LSPs) in the Au grating nanostructure, improving the sensitivity of the SPR sensor. According to the optimized structural parameters, the proposed sensor is fabricated using e-beam lithography and magnetron sputtering. In addition, the proposed sensor is very sensitive to the detection of small molecules. The limit of detection (LOD) for okadaic acid (OA) is 0.72 ng/mL based on an indirect competitive inhibition method, which is approximately 38 times lower than the conventional Au sensor. Such a high-sensitivity SPR biosensor has potential in the applications of immunoassays and clinical diagnosis.
Collapse
|
4
|
Abstract
In this paper, the thermal stability of a Bloch Surface Wave (BSW) assisted bio-photonic sensor is investigated. The structural analysis is carried out using the transfer matrix method (TMM). The design comprises a truncated one-dimensional photonic crystal (1D-PhC) structure along with a defective top layer. The structural parameters are optimized to excite a BSW at the top interface for an operating wavelength of 632.8 nm. The mode confinement is confirmed by using wavelength interrogation, angular interrogation and surface electric field profile. Further, the effect of thermal variation on BSW excitation angle and sensitivity is carried out. The analysis shows the average variations in excitation angle and sensitivity of about −0.00096 degree/°C and 0.01046 (degree/RIU)/°C, respectively. Additionally, the analysis is also extended towards different lower wavelengths of 400 nm and 550 nm, which provides average variations in the excitation angles of about −0.0027 degree/°C, and 0.0016 degree/°C. This shows that the structural sensitivity response is more thermally stable at the lower wavelength range. Thus, showing its potential applications in designing thermally stable bio-photonic sensors.
Collapse
|
5
|
Barrientos K, Rocha MI, Jaramillo M, Vásquez NA. High Frequency (100, 150 MHz) Quartz Crystal Microbalance (QCM) Piezoelectric Genosensor for the Determination of the Escherichia coli O157 rfbE Gene. ANAL LETT 2022. [DOI: 10.1080/00032719.2022.2068566] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Affiliation(s)
- Kaory Barrientos
- GIBEC Research Group, Faculty of Life Sciences, Universidad EIA, Medellín, Colombia
| | | | - Marisol Jaramillo
- GIBEC Research Group, Faculty of Life Sciences, Universidad EIA, Medellín, Colombia
| | - Neil Aldrín Vásquez
- BioA Research Group, Faculty of Sciences, Universidad Nacional de Colombia, Medellín, Colombia
| |
Collapse
|
6
|
Frutiger A, Tanno A, Hwu S, Tiefenauer RF, Vörös J, Nakatsuka N. Nonspecific Binding-Fundamental Concepts and Consequences for Biosensing Applications. Chem Rev 2021; 121:8095-8160. [PMID: 34105942 DOI: 10.1021/acs.chemrev.1c00044] [Citation(s) in RCA: 89] [Impact Index Per Article: 29.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Nature achieves differentiation of specific and nonspecific binding in molecular interactions through precise control of biomolecules in space and time. Artificial systems such as biosensors that rely on distinguishing specific molecular binding events in a sea of nonspecific interactions have struggled to overcome this issue. Despite the numerous technological advancements in biosensor technologies, nonspecific binding has remained a critical bottleneck due to the lack of a fundamental understanding of the phenomenon. To date, the identity, cause, and influence of nonspecific binding remain topics of debate within the scientific community. In this review, we discuss the evolution of the concept of nonspecific binding over the past five decades based upon the thermodynamic, intermolecular, and structural perspectives to provide classification frameworks for biomolecular interactions. Further, we introduce various theoretical models that predict the expected behavior of biosensors in physiologically relevant environments to calculate the theoretical detection limit and to optimize sensor performance. We conclude by discussing existing practical approaches to tackle the nonspecific binding challenge in vitro for biosensing platforms and how we can both address and harness nonspecific interactions for in vivo systems.
Collapse
Affiliation(s)
- Andreas Frutiger
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zürich, Zürich CH-8092, Switzerland
| | - Alexander Tanno
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zürich, Zürich CH-8092, Switzerland
| | - Stephanie Hwu
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zürich, Zürich CH-8092, Switzerland
| | - Raphael F Tiefenauer
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zürich, Zürich CH-8092, Switzerland
| | - János Vörös
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zürich, Zürich CH-8092, Switzerland
| | - Nako Nakatsuka
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zürich, Zürich CH-8092, Switzerland
| |
Collapse
|
7
|
Frutiger A, Gatterdam K, Blickenstorfer Y, Reichmuth AM, Fattinger C, Vörös J. Ultra Stable Molecular Sensors by Submicron Referencing and Why They Should Be Interrogated by Optical Diffraction-Part II. Experimental Demonstration. SENSORS (BASEL, SWITZERLAND) 2020; 21:E9. [PMID: 33375003 PMCID: PMC7792590 DOI: 10.3390/s21010009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 12/07/2020] [Accepted: 12/08/2020] [Indexed: 12/12/2022]
Abstract
Label-free optical biosensors are an invaluable tool for molecular interaction analysis. Over the past 30 years, refractometric biosensors and, in particular, surface plasmon resonance have matured to the de facto standard of this field despite a significant cross reactivity to environmental and experimental noise sources. In this paper, we demonstrate that sensors that apply the spatial affinity lock-in principle (part I) and perform readout by diffraction overcome the drawbacks of established refractometric biosensors. We show this with a direct comparison of the cover refractive index jump sensitivity as well as the surface mass resolution of an unstabilized diffractometric biosensor with a state-of-the-art Biacore 8k. A combined refractometric diffractometric biosensor demonstrates that a refractometric sensor requires a much higher measurement precision than the diffractometric to achieve the same resolution. In a conceptual and quantitative discussion, we elucidate the physical reasons behind and define the figure of merit of diffractometric biosensors. Because low-precision unstabilized diffractometric devices achieve the same resolution as bulky stabilized refractometric sensors, we believe that label-free optical sensors might soon move beyond the drug discovery lab as miniaturized, mass-produced environmental/medical sensors. In fact, combined with the right surface chemistry and recognition element, they might even bring the senses of smell/taste to our smart devices.
Collapse
Affiliation(s)
- Andreas Frutiger
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, University and ETH Zürich, 8092 Zürich, Switzerland; (A.F.); (Y.B.); (A.M.R.)
| | - Karl Gatterdam
- Institute of Structural Biology, University Hospital Bonn, University of Bonn, 53127 Bonn, Germany;
| | - Yves Blickenstorfer
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, University and ETH Zürich, 8092 Zürich, Switzerland; (A.F.); (Y.B.); (A.M.R.)
| | - Andreas Michael Reichmuth
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, University and ETH Zürich, 8092 Zürich, Switzerland; (A.F.); (Y.B.); (A.M.R.)
| | - Christof Fattinger
- Roche Pharma Research and Early Development, Roche Innovation Center Basel, 4070 Basel, Switzerland
| | - János Vörös
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, University and ETH Zürich, 8092 Zürich, Switzerland; (A.F.); (Y.B.); (A.M.R.)
| |
Collapse
|
8
|
Hu S, Chen Y, Chen Y, Chen L, Zheng H, Azeman NH, Liu MX, Liu GS, Luo Y, Chen Z. High-performance fiber plasmonic sensor by engineering the dispersion of hyperbolic metamaterials composed of Ag/TiO 2. OPTICS EXPRESS 2020; 28:25562-25573. [PMID: 32907073 DOI: 10.1364/oe.397461] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Accepted: 08/06/2020] [Indexed: 06/11/2023]
Abstract
Hyperbolic metamaterials (HMMs) have attracted increasing attentions because of their unique dispersion properties and the flexibility to control the dispersion by changing the components and fractions of the composed materials. In this work, for the first time, we demonstrate a plasmonic sensor based on a side-polished few-mode-fiber coated with a layered of HMM, which is composed of alternating layers of Ag and TiO2. To optimize the sensor performance, the effects of the metal filling fraction (ρ) and the number of bilayers (Nbi) on the HMM dispersion are thoroughly engineered with the effective medium theory and the finite element method. It is found that the HMM with ρ=0.7 and Nbi = 3 can provide the average sensitivity of 5114.3 nm/RIU (RIU: refractive index unit), and the highest sensitivity 9000 nm/RIU in the surrounding refractive index (SRI) ranging from 1.33 to 1.40 RIU. The corresponding figure of merit (FOM) reaches a maximum of 230.8 RIU-1 which is much higher than that of the conventional silver film based SPR sensor. The influence of ρ and Nbi on the sensitivity are well explained from the aspects of the electrical field distribution and the dispersion relationship. This work opens a gate to significantly improve fiber plasmonic sensors performance by engineering the HMM dispersion, which is expected to meet the emergent demand in the biological, medical and clinical applications.
Collapse
|
9
|
Design analysis of Bloch surface wave based sensor for haemoglobin concentration measurement. APPLIED NANOSCIENCE 2020. [DOI: 10.1007/s13204-020-01437-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
10
|
Multi-band MIM refractive index biosensor based on Ag-air grating with equivalent circuit and T-matrix methods in near-infrared region. Sci Rep 2020; 10:6357. [PMID: 32286460 PMCID: PMC7156425 DOI: 10.1038/s41598-020-63459-w] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Accepted: 04/01/2020] [Indexed: 11/15/2022] Open
Abstract
In this paper, a multi-band metal-insulator-metal (MIM) perfect absorber with refractive index sensing capability has been investigated in near-infrared region. The proposed structure has been studied for biomedical applications such as detection of solution of glucose in water, diagnosis of different stages of malaria infection, bacillus bacteria and cancer cells. The MIM configuration improves the sensing parameters of the biosensor due to the good interaction with the analyte. The high sensitivity and figure of merit of 2000 nm/RIU and 100 RIU−1 have been achieved, respectively. Also, the Ag-air grating in the suggested plasmonic sensor helps the localized surface plasmons excitation and makes the structure sensitive to the incident lightwave polarization. Therefore, the presented biosensor behaves like a polarization switch with the high extinction ratio and fast response time of 25.15 dB and 100 fs, respectively. The methods of equivalent circuit model and transmission matrix have been utilized to verify the simulation results, as a new challenge in near-infrared region. The new idea of multi-application plasmonic devices, the feasibility of fabrication for the presented structure and utilizing mentioned analytical methods in near-infrared region could pave the way for the future of plasmonic structures.
Collapse
|
11
|
Leung CH, Wu KJ, Li G, Wu C, Ko CN, Ma DL. Application of label-free techniques in microfluidic for biomolecules detection and circulating tumor cells analysis. Trends Analyt Chem 2019. [DOI: 10.1016/j.trac.2019.06.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
12
|
Xiong X, Chen Y, Wang H, Hu S, Luo Y, Dong J, Zhu W, Qiu W, Guan H, Lu H, Yu J, Zhang J, Chen Z. Plasmonic Interface Modified with Graphene Oxide Sheets Overlayer for Sensitivity Enhancement. ACS APPLIED MATERIALS & INTERFACES 2018; 10:34916-34923. [PMID: 30234294 DOI: 10.1021/acsami.8b11424] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A novel strategy to modify the plasmonic interface by spin-coating an overlayer of graphene oxide sheets (GOSs) on top of the surface plasmon resonance (SPR) sensor is proposed and demonstrated. Thanks to the excellent electrical conductivity, large surface area, and high-refractive index of the GOSs layer, the GOSs-modified SPR (GOSs-SPR) sensor achieves an improved sensitivity in the detection of bulky refractive index solutions and bovine serum albumin (BSA) solutions. The maximum sensitivity of 2715.1 nm/RIU achieved by three spin-coatings shows an enhancement of 20.2% than the case without the modification of the GOSs overlayer. Benefiting from the large surface area and abundant surface functional groups, the GOSs-SPR sensor has a greater sensitivity enhancement (up to 39.35%) in the detection of the BSA molecules. Most importantly, we have firstly experimentally demonstrated that the GOSs overlayer with thickness over hundreds nanometers can still lead to a great enhancement of sensitivity of SPR sensors. Additionally, the proposed modification method for the plasmonic interface is a simple and effective strategy to boost the sensitivity in a chemical-free and environment-friendly manner, without additional chemical or biological amplification steps. These unique features make the proposed GOSs-SPR biosensor a low-cost and biocompatible platform in the fields of biochemical sensing, drug screening, and environmental monitoring.
Collapse
|
13
|
Yang M, Xiong X, He R, Luo Y, Tang J, Dong J, Lu H, Yu J, Guan H, Zhang J, Chen Z, Liu M. Halloysite Nanotube-Modified Plasmonic Interface for Highly Sensitive Refractive Index Sensing. ACS APPLIED MATERIALS & INTERFACES 2018; 10:5933-5940. [PMID: 29393620 DOI: 10.1021/acsami.7b16511] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We propose and demonstrate a novel strategy to modify the plasmonic interface by using a thin layer of halloysite nanotubes (HNTs). The modified surface plasmon resonance (SPR) sensor achieves a greatly improved sensitivity because the large surface area and high refractive index of the HNTs layer significantly increase the probing electric field intensity and hence the measurement sensitivity. More significantly, the thickness of the HNTs layer can be tailored by spraying different concentrations of HNTs ethanol suspension. The proposed sensors show significant superiority in terms of the highest sensitivity (10431 nm/RIU) and the enhancement fold (5.6-folds) over those reported previously. Additionally, the proposed approach is a chemical-free and environment-friendly modification method for the sensor interface, without additional chemical or biological amplification steps (no toxic solvents are used). These unique features make the proposed HNTs-SPR biosensor a simple, biocompatible, and low-cost platform for the trace-level detection of biochemical species in a rapid, sensitive, and nondestructive manner.
Collapse
Affiliation(s)
- Mei Yang
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, ‡Department of Materials Science and Engineering, §Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes, and ∥Key Laboratory of Visible Light Communications of Guangzhou, Jinan University , Guangzhou 510632, China
| | - Xin Xiong
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, ‡Department of Materials Science and Engineering, §Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes, and ∥Key Laboratory of Visible Light Communications of Guangzhou, Jinan University , Guangzhou 510632, China
| | - Rui He
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, ‡Department of Materials Science and Engineering, §Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes, and ∥Key Laboratory of Visible Light Communications of Guangzhou, Jinan University , Guangzhou 510632, China
| | - Yunhan Luo
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, ‡Department of Materials Science and Engineering, §Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes, and ∥Key Laboratory of Visible Light Communications of Guangzhou, Jinan University , Guangzhou 510632, China
| | - Jieyuan Tang
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, ‡Department of Materials Science and Engineering, §Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes, and ∥Key Laboratory of Visible Light Communications of Guangzhou, Jinan University , Guangzhou 510632, China
| | - Jiangli Dong
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, ‡Department of Materials Science and Engineering, §Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes, and ∥Key Laboratory of Visible Light Communications of Guangzhou, Jinan University , Guangzhou 510632, China
| | - Huihui Lu
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, ‡Department of Materials Science and Engineering, §Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes, and ∥Key Laboratory of Visible Light Communications of Guangzhou, Jinan University , Guangzhou 510632, China
| | - Jianhui Yu
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, ‡Department of Materials Science and Engineering, §Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes, and ∥Key Laboratory of Visible Light Communications of Guangzhou, Jinan University , Guangzhou 510632, China
| | - Heyuan Guan
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, ‡Department of Materials Science and Engineering, §Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes, and ∥Key Laboratory of Visible Light Communications of Guangzhou, Jinan University , Guangzhou 510632, China
| | - Jun Zhang
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, ‡Department of Materials Science and Engineering, §Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes, and ∥Key Laboratory of Visible Light Communications of Guangzhou, Jinan University , Guangzhou 510632, China
| | - Zhe Chen
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, ‡Department of Materials Science and Engineering, §Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes, and ∥Key Laboratory of Visible Light Communications of Guangzhou, Jinan University , Guangzhou 510632, China
| | - Mingxian Liu
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, ‡Department of Materials Science and Engineering, §Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes, and ∥Key Laboratory of Visible Light Communications of Guangzhou, Jinan University , Guangzhou 510632, China
| |
Collapse
|
14
|
Sun YS, Landry JP, Zhu XD. Evaluation of Kinetics Using Label-Free Optical Biosensors. INSTRUMENTATION SCIENCE & TECHNOLOGY 2017; 45:486-505. [PMID: 30906180 PMCID: PMC6430235 DOI: 10.1080/10739149.2016.1277535] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Optical biosensors provide a platform for qualitatively and quantitatively analyzing various biomolecular interactions. In addition to advantages such as label-free and high-throughput detection, these devices are also capable of measuring real-time binding curves in response to changes in optical properties of biomolecules. These kinetic data may be fitted to models to extract binding affinities such as association rates, dissociation rates, and equilibrium dissociation constants. In these biosensors, one of the binding pair is usually immobilized on a solid substrate for capturing the other. Due to the nature of these surface-based methods, mass transport effects and immobilization heterogenetity may cause problems when fitting the kinetic curves with the simple one-to-one Langmuir model. Here real-time binding curves of various antibody-antigen reactions were obtained by using an ellipsometry-based biosensor, and the results were fitted to the simple one-to-one model as well as a more sophisticated approach. The results show that the one-to-two model fitted much better to the curves than the one-to-one model. The two-site model may be explained by assuming two immobilization configurations on the surface. In summary, in fitting real-time curves obtained from optical biosensors, more sophisticated models are usually required to take surface-related issues, such as immobilization heterogenetity and mass transport effects within targets, into account.
Collapse
Affiliation(s)
- Yung-Shin Sun
- Department of Physics, Fu-Jen Catholic University, New Taipei City, Taiwan
| | - James P. Landry
- Department of Physics, University of California at Davis, Davis, CA, USA
| | - X. D. Zhu
- Department of Physics, University of California at Davis, Davis, CA, USA
| |
Collapse
|
15
|
Indutnyi I, Ushenin Y, Hegemann D, Vandenbossche M, Myn’ko V, Lukaniuk M, Shepeliavyi P, Korchovyi A, Khrystosenko R. Enhancing Surface Plasmon Resonance Detection Using Nanostructured Au Chips. NANOSCALE RESEARCH LETTERS 2016; 11:535. [PMID: 27910072 PMCID: PMC5133208 DOI: 10.1186/s11671-016-1760-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Accepted: 11/22/2016] [Indexed: 06/06/2023]
Abstract
The increase of the sensitivity of surface plasmon resonance (SPR) refractometers was studied experimentally by forming a periodic relief in the form of a grating with submicron period on the surface of the Au-coated chip. Periodic reliefs of different depths and spatial frequency were formed on the Au film surface using interference lithography and vacuum chalcogenide photoresists. Spatial frequencies of the grating were selected close to the conditions of Bragg reflection of plasmons for the working wavelength of the SPR refractometer and the used environment (solution of glycerol in water). It was found that the degree of refractometer sensitivity enhancement and the value of the interval of environment refractive index variation, Δn, in which this enhancement is observed, depend on the depth of the grating relief. By increasing the depth of relief from 13.5 ± 2 nm to 21.0 ± 2 nm, Δn decreased from 0.009 to 0.0031, whereas sensitivity increased from 110 deg./RIU (refractive index unit) for a standard chip up to 264 and 484 deg./RIU for the nanostructured chips, respectively. Finally, it was shown that the working range of the sensor can be adjusted to the refractive index of the studied environment by changing the spatial frequency of the grating, by modification of the chip surface or by rotation of the chip.
Collapse
Affiliation(s)
- Ivan Indutnyi
- V. Lashkaryov Institute of Semiconductor Physics, Nat. Acad. of Sci. of Ukraine, Prospect Nauky, 41, 03028 Kyiv, Ukraine
| | - Yuriy Ushenin
- V. Lashkaryov Institute of Semiconductor Physics, Nat. Acad. of Sci. of Ukraine, Prospect Nauky, 41, 03028 Kyiv, Ukraine
| | - Dirk Hegemann
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Lerchenfeldstrasse 5, CH-9014 St.Gallen, Switzerland
| | - Marianne Vandenbossche
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Lerchenfeldstrasse 5, CH-9014 St.Gallen, Switzerland
| | - Victor Myn’ko
- V. Lashkaryov Institute of Semiconductor Physics, Nat. Acad. of Sci. of Ukraine, Prospect Nauky, 41, 03028 Kyiv, Ukraine
| | - Mariia Lukaniuk
- V. Lashkaryov Institute of Semiconductor Physics, Nat. Acad. of Sci. of Ukraine, Prospect Nauky, 41, 03028 Kyiv, Ukraine
| | - Petro Shepeliavyi
- V. Lashkaryov Institute of Semiconductor Physics, Nat. Acad. of Sci. of Ukraine, Prospect Nauky, 41, 03028 Kyiv, Ukraine
| | - Andrii Korchovyi
- V. Lashkaryov Institute of Semiconductor Physics, Nat. Acad. of Sci. of Ukraine, Prospect Nauky, 41, 03028 Kyiv, Ukraine
| | - Roman Khrystosenko
- V. Lashkaryov Institute of Semiconductor Physics, Nat. Acad. of Sci. of Ukraine, Prospect Nauky, 41, 03028 Kyiv, Ukraine
| |
Collapse
|
16
|
|
17
|
Parandoosh Z, Knowles SK, Xiao XY, Zhao C, David GS, Nova MP. Synthesis Coupled to Scintillation Proximity Affinity Screening. ACTA ACUST UNITED AC 2016. [DOI: 10.1177/108705719800300408] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The rapidly changing developments in genomics and combinatorial chemistry, generating new drug targets and large numbers of compounds, are beginning to push the limits of screening efficiently. Thus, there is a need for novel tools and strategies to improve high throughput screening. A novel approach is to couple synthesis and screening on a common platform, rather than to increase the rate at which traditional screening methods can be implemented. We have developed a proprietary grafted polymer with special fluorescence characteristics referred to as Electronically Encoded Fluorescence matriX (EFX™), which has the sturdiness and required functionality for direct chemical synthesis as well as suitable surface characteristics for measuring interactions in aqueous solution. This matrix is fabricated into a MicroTube reactor, and each tube is associated with an electronically encoded tag. The system follows a homogenous assay protocol and is based on the scintillation proximity principle. Using solid-phase chemistry, a variety of small molecules may be synthesized onto the EFX. A simple binding assay can be conducted by combining a collection of MicroTubes with any radiolabeled acceptor molecule. The MicroTubes that carry active compounds are selected based on the photon mission or fluorescence characteristics. We validated this approach by evaluating the interactions of biotin with radiolabeled streptavidin.
Collapse
Affiliation(s)
| | - Sue K. Knowles
- IRORI, 11149 North Torrey Pines Road, La Jolla, CA 92037-1031
| | - Xiao-Yi Xiao
- IRORI, 11149 North Torrey Pines Road, La Jolla, CA 92037-1031
| | - Chanfeng Zhao
- IRORI, 11149 North Torrey Pines Road, La Jolla, CA 92037-1031
| | - Gary S. David
- Impact Enterprises, 9477 Poole St., La Jolla, CA 92037
| | - Michael P. Nova
- IRORI, 11149 North Torrey Pines Road, La Jolla, CA 92037-1031
| |
Collapse
|
18
|
Microfluidic Surface Plasmon Resonance Sensors: From Principles to Point-of-Care Applications. SENSORS 2016; 16:s16081175. [PMID: 27472340 PMCID: PMC5017341 DOI: 10.3390/s16081175] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Revised: 07/18/2016] [Accepted: 07/21/2016] [Indexed: 12/15/2022]
Abstract
Surface plasmon resonance (SPR) is a label-free, highly-sensitive, and real-time sensing technique. Conventional SPR sensors, which involve a planar thin gold film, have been widely exploited in biosensing; various miniaturized formats have been devised for portability purposes. Another type of SPR sensor which utilizes localized SPR (LSPR), is based on metal nanostructures with surface plasmon modes at the structural interface. The resonance condition is sensitive to the refractive index change of the local medium. The principles of these two types of SPR sensors are reviewed and their integration with microfluidic platforms is described. Further applications of microfluidic SPR sensors to point-of-care (POC) diagnostics are discussed.
Collapse
|
19
|
Plucinski L, Ranjan Gartia M, Arnold WR, Ameen A, Chang TW, Hsiao A, Logan Liu G, Das A. Substrate binding to cytochrome P450-2J2 in Nanodiscs detected by nanoplasmonic Lycurgus cup arrays. Biosens Bioelectron 2016; 75:337-46. [DOI: 10.1016/j.bios.2015.07.041] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Revised: 06/29/2015] [Accepted: 07/19/2015] [Indexed: 01/25/2023]
|
20
|
Wang L, Yu Y, Chow DC, Yan F, Hsu CC, Stossi F, Mancini MA, Palzkill T, Liao L, Zhou S, Xu J, Lonard DM, O'Malley BW. Characterization of a Steroid Receptor Coactivator Small Molecule Stimulator that Overstimulates Cancer Cells and Leads to Cell Stress and Death. Cancer Cell 2015; 28:240-52. [PMID: 26267537 PMCID: PMC4536575 DOI: 10.1016/j.ccell.2015.07.005] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2014] [Revised: 03/12/2015] [Accepted: 07/10/2015] [Indexed: 12/18/2022]
Abstract
By integrating growth pathways on which cancer cells rely, steroid receptor coactivators (SRC-1, SRC-2, and SRC-3) represent emerging targets in cancer therapeutics. High-throughput screening for SRC small molecule inhibitors (SMIs) uncovered MCB-613 as a potent SRC small molecule "stimulator" (SMS). We demonstrate that MCB-613 can super-stimulate SRCs' transcriptional activity. Further investigation revealed that MCB-613 increases SRCs' interactions with other coactivators and markedly induces ER stress coupled to the generation of reactive oxygen species (ROS). Because cancer cells overexpress SRCs and rely on them for growth, we show that we can exploit MCB-613 to selectively induce excessive stress in cancer cells. This suggests that over-stimulating the SRC oncogenic program can be an effective strategy to kill cancer cells.
Collapse
Affiliation(s)
- Lei Wang
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Yang Yu
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Dar-Chone Chow
- Department of Pharmacology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Fei Yan
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Chih-Chao Hsu
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Fabio Stossi
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Michael A Mancini
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Timothy Palzkill
- Department of Pharmacology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Lan Liao
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Suoling Zhou
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Jianming Xu
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - David M Lonard
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA.
| | - Bert W O'Malley
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA.
| |
Collapse
|
21
|
Yao M, Wu Y, Fang X, Yang Y, Liu H. Spectral surface plasmon resonance imaging for the detection of clenbuterol via three-dimensional immobilization of bioprobes. Anal Biochem 2015; 475:40-3. [DOI: 10.1016/j.ab.2015.01.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Revised: 12/31/2014] [Accepted: 01/14/2015] [Indexed: 11/16/2022]
|
22
|
Study of the interactions of proteins with a solid surface using complementary acoustic and optical techniques. Biointerphases 2014; 9:029015. [DOI: 10.1116/1.4874736] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
|
23
|
Haes AJ, Duyne RPV. Preliminary studies and potential applications of localized surface plasmon resonance spectroscopy in medical diagnostics. Expert Rev Mol Diagn 2014; 4:527-37. [PMID: 15225100 DOI: 10.1586/14737159.4.4.527] [Citation(s) in RCA: 148] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Miniature optical sensors that specifically identify low concentrations of environmental and biological substances are in high demand. Currently, there is no optical sensor that provides identification of the aforementioned species without amplification techniques at naturally occurring concentrations. Recently, it has been demonstrated that triangular silver nanoparticles have remarkable optical properties and that their enhanced sensitivity to their nanoenvironment has been used to develop a new class of optical sensors using localized surface plasmon resonance spectroscopy. The examination of both model and nonmodel biological assays using localized surface plasmon resonance spectroscopy will be presented in this review. It will be demonstrated that the use of a localized surface plasmon resonance nanosensor rivals the sensitivity and selectivity of, and provides a low-cost alternative to, commercially available sensors.
Collapse
Affiliation(s)
- Amanda J Haes
- Northwestern University, Department of Chemistry, 2145 Sheridan Road, Evanston, IL 60208-3113, USA.
| | | |
Collapse
|
24
|
Hirst DJ, Lee TH, Swann MJ, Aguilar MI. Combined mass and structural kinetic analysis of multistate antimicrobial peptide-membrane interactions. Anal Chem 2013; 85:9296-304. [PMID: 23998643 DOI: 10.1021/ac402148v] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Kinetic analysis of peptide-membrane interactions generally involves a curve fitting process with no information about what the different curves may physically correspond to. Given the multistep process of peptide-membrane interactions, a computational method that utilizes physical parameters that relate to both peptide binding and membrane structure would provide new insight into this complex process. In this study, kinetic models accounting for two-state and three-state mechanisms were fitted to our previously reported simultaneous real-time measurements of mass and birefringence during the binding and dissociation of the peptide HPA3 (Hirst, D.; Lee, T.-H.; Swann, M.; Unabia, S.; Park, Y.; Hahm, K.-S.; Aguilar, M. Eur. Biophys. J. 2011, 40, 503-514); significantly, the mass and birefringence are constrained by the same set of kinetic constants, allowing the unification of peptide binding patterns with membrane structure changes. For the saturated phospholipid dimyristoyl-phosphatidylcholine (DMPC) the two-state model was sufficient to account for the observed changes in mass and birefringence, whereas for the unsaturated phospholipid 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC) the two-state model was found to be inadequate and a three-state model gave a significantly better fit. The third state of interaction for POPC was found to disrupt the bilayer much more than the previous two states. We propose a hypothesis for the mechanism of membrane permeabilization based on the results featuring a loosely bound first state, a tightly bound second state, and a highly membrane-disrupting third state. The results demonstrate the importance of the difference in membrane fluidity between the gel phase DMPC and the liquid crystal phase POPC for peptide-membrane interactions and establish the combination of DPI and kinetic modeling as a powerful tool for revealing features of peptide-membrane interaction mechanisms, including intermediate states between initial binding and full membrane disruption.
Collapse
Affiliation(s)
- Daniel J Hirst
- Department of Biochemistry and Molecular Biology, Monash University , Clayton, Victoria 3800, Australia
| | | | | | | |
Collapse
|
25
|
Wrobleski ST, Lin S, Murali Dhar T, Dyckman AJ, Li T, Pitt S, Zhang R, Fan Y, Doweyko AM, Tokarski JS, Kish KF, Kiefer SE, Sack JS, Newitt JA, Witmer MR, McKinnon M, Barrish JC, Dodd JH, Schieven GL, Leftheris K. The identification of novel p38α isoform selective kinase inhibitors having an unprecedented p38α binding mode. Bioorg Med Chem Lett 2013; 23:4120-6. [DOI: 10.1016/j.bmcl.2013.05.047] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2013] [Revised: 05/03/2013] [Accepted: 05/13/2013] [Indexed: 11/17/2022]
|
26
|
Kim KH, Kim W, Hong JC, Ko HS, Kim BK, Huh C, Sung GY. Fabrication of a Nanosize Pattern Embedded Plastic Chip via an Injection Molding Method for Application to an Optical Biosensor. INT POLYM PROC 2013. [DOI: 10.3139/217.2357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
We demonstrate a commercialized injection molding method for nano patterning of polymethyl methacrylate (PMMA) for the purpose of mass production of a label-free optical biosensor chip. Scanning electron microscope (SEM) images clearly show uniform nanopattern transfer on the plastic chip fabricated by an injection molding method. A uniformly deposited silicon nitride layer having a high refractive index by a plasma enhanced chemical vapor deposition (PECVD) technique is also observed. A unique characterization method is described wherein optical resonance reflection is used accurately and quickly to characterize the geometrical sensor structure. The authors anticipate that this robust method will provide an excellent means of producing an optical resonance reflection biosensor (ORRB).
Collapse
Affiliation(s)
- K. H. Kim
- IT-Convergence Technology Research Div., Electronics and Telecommunications Research Institute, Daejeon, South Korea
| | - W. Kim
- IT-Convergence Technology Research Div., Electronics and Telecommunications Research Institute, Daejeon, South Korea
| | - J. C. Hong
- IT-Convergence Technology Research Div., Electronics and Telecommunications Research Institute, Daejeon, South Korea
| | - H. S. Ko
- IT-Convergence Technology Research Div., Electronics and Telecommunications Research Institute, Daejeon, South Korea
| | - B. K. Kim
- IT-Convergence Technology Research Div., Electronics and Telecommunications Research Institute, Daejeon, South Korea
| | - C. Huh
- IT-Convergence Technology Research Div., Electronics and Telecommunications Research Institute, Daejeon, South Korea
| | - G. Y. Sung
- IT-Convergence Technology Research Div., Electronics and Telecommunications Research Institute, Daejeon, South Korea
| |
Collapse
|
27
|
Yoshida W, Yamamoto H, Ikebukuro K. An Optical Biosensing System Based on Interference-Enhanced Reflection with Aptameric Enzyme Subunits of Thrombin. ANAL LETT 2013. [DOI: 10.1080/00032719.2012.718828] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
28
|
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
|
29
|
Wolff C, Carrington B, Varrin-Doyer M, Vandendriessche A, Van der Perren C, Famelart M, Gillard M, Foerch P, Rogemond V, Honnorat J, Lawson A, Miller K. Drug binding assays do not reveal specific binding of lacosamide to collapsin response mediator protein 2 (CRMP-2). CNS Neurosci Ther 2012; 18:493-500. [PMID: 22672303 DOI: 10.1111/j.1755-5949.2012.00313.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
AIMS Lacosamide (LCM; SPM 927, Vimpat®) is an antiepileptic drug (AED) used as adjunctive treatment for adults with partial-onset seizures. LCM has a different mode of action from traditional sodium channel blocking AEDs in that it selectively enhances slow inactivation of sodium channels without affecting fast inactivation. Initial investigations suggested that LCM might have an additional mode of action by binding to the collapsin response mediator protein 2 (CRMP-2), which is further investigated here. METHODS LCM binding to native and cloned human CRMP-2 was determined using radioligand binding experiments and surface plasmon resonance measurements. RESULTS No specific binding of [(3) H]LCM (free concentration 100-1450 nM) to isolated or membrane bound human CRMP-2 expressed in mammalian cell systems and bacteria was observed. Surface plasmon resonance analysis also showed that LCM, over a concentration range of 0.39-100 μM, does not specifically bind to human CRMP-2. CONCLUSION The diverse drug binding methods employed here are well suited to detect specific binding of LCM to CRMP-2 in the micromolar range, yet the results obtained were all negative. Results of this study suggest that LCM does not specifically bind to CRMP-2.
Collapse
|
30
|
Surface plasmon resonance, fluorescence, and circular dichroism studies for the characterization of the binding of BACE-1 inhibitors. Anal Bioanal Chem 2012; 405:827-35. [DOI: 10.1007/s00216-012-6312-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2012] [Revised: 07/21/2012] [Accepted: 07/30/2012] [Indexed: 10/28/2022]
|
31
|
Guo X. Surface plasmon resonance based biosensor technique: a review. JOURNAL OF BIOPHOTONICS 2012; 5:483-501. [PMID: 22467335 DOI: 10.1002/jbio.201200015] [Citation(s) in RCA: 170] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2012] [Revised: 03/10/2012] [Accepted: 03/11/2012] [Indexed: 05/12/2023]
Abstract
Optical Surface plasmon resonance (SPR) biosensors represent the most advanced and developed optical label-free biosensor technology. Optical SPR biosensors are a powerful detection and analysis tool that has vast applications in environmental protection, biotechnology, medical diagnostics, drug screening, food safety and security. This article reviews the recent development of SPR biosensor techniques, including bulk SPR and localized SPR (LSPR) biosensors, for detecting interactions between an analyte of interest in solution and a biomolecular recognition. The concepts of bulk and localized SPs and the working principles of both sensing techniques are introduced. Major sensing advances on biorecognition elements, measurement formats, and sensing platforms are presented. Finally, the discussions on both biosensor techniques as well as comparison of both SPR sensing techniques are made.
Collapse
Affiliation(s)
- Xiaowei Guo
- School of Electrical Engineering and Computer Science, and College of Engineering, Seoul National University, 599 Gwanangno, Gwanak-gu, Seoul 151-744, South Korea.
| |
Collapse
|
32
|
Ruffato G, Romanato F. Grating-coupled surface plasmon resonance in conical mounting with polarization modulation. OPTICS LETTERS 2012; 37:2718-2720. [PMID: 22743506 DOI: 10.1364/ol.37.002718] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A grating-coupled surface plasmon resonance (GCSPR) technique based on polarization modulation in conical mounting is presented. A metallic grating is azimuthally rotated to support double-surface plasmon polariton excitation and exploit the consequent sensitivity enhancement. Corresponding to the resonance polar angle, a polarization scan of incident light is performed, and reflectivity data are collected before and after functionalization with a dodecanethiol self-assembled monolayer. The output signal exhibits a harmonic dependence on polarization, and the phase term is used as a parameter for sensing. This technique offers the possibility of designing extremely compact, fast, and cheap high-resolution plasmonic sensors based on GCSPR.
Collapse
Affiliation(s)
- G Ruffato
- Department of Physics G. Galilei, Padova University, Via Marzolo 8, Padova 35131, Italy.
| | | |
Collapse
|
33
|
Yang RZ, Dong WF, Meng X, Zhang XL, Sun YL, Hao YW, Guo JC, Zhang WY, Yu YS, Song JF, Qi ZM, Sun HB. Nanoporous TiO2/polyion thin-film-coated long-period grating sensors for the direct measurement of low-molecular-weight analytes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:8814-8821. [PMID: 22594626 DOI: 10.1021/la301445h] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We present novel nanoporous TiO(2)/polyion thin-film-coated long-period fiber grating (LPFG) sensors for the direct measurement of low-molecular-weight chemicals by monitoring the resonance wavelength shift. The hybrid overlay films are prepared by a simple layer-by-layer deposition approach, which is mainly based on the electrostatic interaction of TiO(2) nanoparticles and polyions. By the alternate immersion of LPFG into dispersions of TiO(2) nanoparticles and polyions, respectively, the so-formed TiO(2)/polyion thin film exhibits a unique nanoporous internal structure and has a relative higher refractive index than LPFG cladding. In particular, the porosity of the thin film reduces the diffusion coefficient and enhances the permeability retention of low-molecular-weight analytes within the porous film. The increases in the refractive index of the LPFG overlay results in a distinguished modulation of the resonance wavelength. Therefore, the detection sensitivity of LPFG sensors has been greatly improved, according to theoretical simulation. After the structure of the TiO(2)/polyion thin film was optimized, glucose solutions as an example with a low concentration of 10(-7) M was easily detected and monitored at room temperature.
Collapse
Affiliation(s)
- Rui-Zhu Yang
- State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, PR China
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
34
|
Pfaunmiller E, Moser AC, Hage DS. Biointeraction analysis of immobilized antibodies and related agents by high-performance immunoaffinity chromatography. Methods 2012; 56:130-5. [PMID: 21907805 PMCID: PMC3270122 DOI: 10.1016/j.ymeth.2011.08.016] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2011] [Revised: 08/22/2011] [Accepted: 08/24/2011] [Indexed: 11/25/2022] Open
Abstract
A method is described based on high-performance immunoaffinity chromatography for examining the interactions of immobilized antibodies or related binding agents with their targets. It is shown how this method can be used to obtain information on the binding, elution and regeneration kinetics of immobilized binding agents, such as those used with immunoaffinity supports. The theory behind this approach is briefly described and it is demonstrated how both the kinetic and thermodynamic properties of a biointeraction can be determined experimentally through this method. Several applications are used to illustrate this technique, including antibody-antigen interactions and the binding of aptamers with their targets in the presence of silica-based supports. The same approach can be adapted for use with other types of targets, binding agents and support materials.
Collapse
Affiliation(s)
| | - Annette C. Moser
- Chemistry Department, University of Nebraska-Kearney, Kearney, NE
| | - David S. Hage
- Chemistry Department, University of Nebraska-Lincoln, Lincoln, NE
| |
Collapse
|
35
|
Lowenthal MS, Gasca-Aragon H, Schiel JE, Dodder NG, Bunk DM. A quantitative LC-MS/MS method for comparative analysis of capture-antibody affinity toward protein antigens. J Chromatogr B Analyt Technol Biomed Life Sci 2011; 879:2726-32. [PMID: 21856254 DOI: 10.1016/j.jchromb.2011.07.037] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2011] [Revised: 07/25/2011] [Accepted: 07/26/2011] [Indexed: 10/18/2022]
Abstract
A mass spectrometry-based antibody selection procedure was developed to evaluate optimal 'capture' monoclonal antibodies that can be used in a variety of analytical measurement applications. The isotope-dilution liquid chromatography-tandem mass spectrometry (ID LC-MS/MS) methodology is based on the use of multiple-reaction monitoring of tryptic peptide fragments derived from protein antigens. A panel of monoclonal antibodies (mAb) was evaluated based on a quantitative determination of relative binding affinity to human cardiac troponin I following immunoprecipitation. Dissociation constants (K(d)) were determined for 'bound mAb-antigen' vs. 'unbound antigen' using non-linear regression analysis. Relative quantification of both antigen and antibody was based on the use of stable isotope-labeled synthetic peptides as internal standards. Optimal 'capture' mAbs were determined through evaluation of relative K(d) constants of all monitored peptide transitions. A panel of six pre-screened candidate capture mAbs was concluded to consist of two subsets of mAbs, each with statistically equivalent K(d) constants as determined using NIST Standard Reference Material (SRM) 2921 - Human Cardiac Troponin Complex. This ID LC-MS/MS method is shown to be capable of quantitatively differentiating mAbs based on relative binding affinities. Selection of optimal capture mAbs can be applied toward a number of analytical applications which require metrological traceability and unbiased quantification.
Collapse
Affiliation(s)
- Mark S Lowenthal
- Analytical Chemistry Division, National Institute of Standards and Technology, 100 Bureau Drive, Stop 8392, Gaithersburg, MD 20899-8392, USA.
| | | | | | | | | |
Collapse
|
36
|
ZHANG Z, FENG X, YAN F, WANG L, ZHANG Z, MA Z. DNA IMMOBILIZATION/HYBRIDIZATION ON CARBOXYL FUNCTIONALIZED PYRROLE COPOLYMER CONDUCTING FILMS. ACTA POLYM SIN 2011. [DOI: 10.3724/sp.j.1105.2011.10100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
37
|
Zhang Z, Liang Y, Liang P, Li C, Fang S. Protein adsorption materials based on conducting polymers: polypyrrole modified with ω-(N
-pyrrolyl)-octylthiol. POLYM INT 2011. [DOI: 10.1002/pi.3011] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
38
|
Situ C, Mooney MH, Elliott CT, Buijs J. Advances in surface plasmon resonance biosensor technology towards high-throughput, food-safety analysis. Trends Analyt Chem 2010. [DOI: 10.1016/j.trac.2010.09.003] [Citation(s) in RCA: 134] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
39
|
Kausaite-Minkstimiene A, Ramanaviciene A, Kirlyte J, Ramanavicius A. Comparative Study of Random and Oriented Antibody Immobilization Techniques on the Binding Capacity of Immunosensor. Anal Chem 2010; 82:6401-8. [PMID: 20669994 DOI: 10.1021/ac100468k] [Citation(s) in RCA: 179] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- A. Kausaite-Minkstimiene
- Nanotechnas − Centre of Nanotechnology and Material science, Vilnius University, Naugarduko 24, 03225 Vilnius, Lithuania, Department of Immunotechnology, State Research Institute “Centre of Innovative Medicine”, Zygimantu 9, 01102 Vilnius, Lithuania, and Institute of Chemistry, State Research Institute Centre for Physical and Technological Sciences, A. Gostauto g. 11, LT-01108 Vilnius, Lithuania
| | - A. Ramanaviciene
- Nanotechnas − Centre of Nanotechnology and Material science, Vilnius University, Naugarduko 24, 03225 Vilnius, Lithuania, Department of Immunotechnology, State Research Institute “Centre of Innovative Medicine”, Zygimantu 9, 01102 Vilnius, Lithuania, and Institute of Chemistry, State Research Institute Centre for Physical and Technological Sciences, A. Gostauto g. 11, LT-01108 Vilnius, Lithuania
| | - J. Kirlyte
- Nanotechnas − Centre of Nanotechnology and Material science, Vilnius University, Naugarduko 24, 03225 Vilnius, Lithuania, Department of Immunotechnology, State Research Institute “Centre of Innovative Medicine”, Zygimantu 9, 01102 Vilnius, Lithuania, and Institute of Chemistry, State Research Institute Centre for Physical and Technological Sciences, A. Gostauto g. 11, LT-01108 Vilnius, Lithuania
| | - A. Ramanavicius
- Nanotechnas − Centre of Nanotechnology and Material science, Vilnius University, Naugarduko 24, 03225 Vilnius, Lithuania, Department of Immunotechnology, State Research Institute “Centre of Innovative Medicine”, Zygimantu 9, 01102 Vilnius, Lithuania, and Institute of Chemistry, State Research Institute Centre for Physical and Technological Sciences, A. Gostauto g. 11, LT-01108 Vilnius, Lithuania
| |
Collapse
|
40
|
Lundquist A, Hansen SB, Nordström H, Danielson UH, Edwards K. Biotinylated lipid bilayer disks as model membranes for biosensor analyses. Anal Biochem 2010; 405:153-9. [PMID: 20599649 DOI: 10.1016/j.ab.2010.06.030] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2010] [Revised: 06/11/2010] [Accepted: 06/15/2010] [Indexed: 02/03/2023]
Abstract
The aim of this study was to investigate the potential of polyethylene glycol (PEG)-stabilized lipid bilayer disks as model membranes for surface plasmon resonance (SPR)-based biosensor analyses. Nanosized bilayer disks that included 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-[biotinyl(polyethylene glycol)(2000)] (DSPE-PEG(2000)-biotin) were prepared and structurally characterized by cryo-transmission electron microscopy (cryo-TEM) imaging. The biotinylated disks were immobilized via streptavidin to three different types of sensor chips (CM3, CM4, and CM5) varying in their degree of carboxymethylation and thickness of the dextran matrix. The bilayer disks were found to interact with and bind stably to the streptavidin-coated sensor surfaces. As a first step toward the use of these bilayer disks as model membranes in SPR-based studies of membrane proteins, initial investigations were carried out with cyclooxygenases 1 and 2 (COX 1 and COX 2). Bilayer disks were preincubated with the respective protein and thereafter allowed to interact with the sensor surface. The signal resulting from the interaction was, in both cases, significantly enhanced as compared with the signal obtained when disks alone were injected over the surface. The results of the study suggest that bilayer disks constitute a new and promising type of model membranes for SPR-based biosensor studies.
Collapse
Affiliation(s)
- Anna Lundquist
- Department of Physical and Analytical Chemistry, BMC, Uppsala University, SE-751 23 Uppsala, Sweden
| | | | | | | | | |
Collapse
|
41
|
Barnett A, Goldys EM. Modeling of the SPR resolution enhancement for conventional and nanoparticle inclusive sensors by using statistical hypothesis testing. OPTICS EXPRESS 2010; 18:9384-97. [PMID: 20588785 DOI: 10.1364/oe.18.009384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
This paper describes a statistical approach that improves the detection accuracy in simulated experimental surface plasmon resonance (SPR) systems operated in a conventional angular readout scheme. Two SPR system have been investigated: a conventional one and a second one, containing absorbing metallic nanoparticles within the sensing layer. The modified Maxwell-Garnett model that optimally describes the experimental literature results was applied to modeling of the nanoparticle-inclusive sensor. Statistical hypothesis testing was then used to determine the limit of detection of the analyte and nanoparticles. Analyte concentrations as low as 1 pM, corresponding to the refractive index change of 4x10(-8) have been detected with optimized metal layers operated close to the nanoparticle absorption maximum. This is about one order of magnitude smaller than the values obtained in conventional SPR systems with nanoparticles and comparable to the phase-sensitive surface plasmon resonance detection.
Collapse
Affiliation(s)
- Anne Barnett
- MQ Photonics,Department of Physics and Engineering, Macquarie University,North Ryde 2109 NSW, Australia
| | | |
Collapse
|
42
|
Nelson MA, Moser A, Hage DS. Biointeraction analysis by high-performance affinity chromatography: Kinetic studies of immobilized antibodies. J Chromatogr B Analyt Technol Biomed Life Sci 2010; 878:165-71. [PMID: 19394281 PMCID: PMC2817957 DOI: 10.1016/j.jchromb.2009.04.004] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2009] [Revised: 03/22/2009] [Accepted: 04/01/2009] [Indexed: 11/26/2022]
Abstract
A system based on high-performance affinity chromatography was developed for characterizing the binding, elution and regeneration kinetics of immobilized antibodies and immunoaffinity supports. This information was provided by using a combination of frontal analysis, split-peak analysis and peak decay analysis to determine the rate constants for antibody-antigen interactions under typical sample application and elution conditions. This technique was tested using immunoaffinity supports that contained monoclonal antibodies for 2,4-dichlorophenoxyacetic acid (2,4-D). Association equilibrium constants measured by frontal analysis for 2,4-D and related compounds with the immobilized antibodies were 1.7-12x10(6)M(-1) at pH 7.0 and 25 degrees C. Split-peak analysis gave association rate constants of 1.4-12x10(5)M(-1)s(-1) and calculated dissociation rate constants of 0.01-0.4s(-1) under the application conditions. Elution at pH 2.5 for the analytes from the antibodies was examined by peak decay analysis and gave dissociation rate constants of 0.056-0.17s(-1). A comparison of frontal analysis results after various periods of column regeneration allowed the rate of antibody regeneration to be examined, with the results giving a first-order regeneration rate constant of 2.4x10(-4)s(-1). This combined approach and the information it provides should be useful in the design and optimization of immunoaffinity chromatography and other analytical methods that employ immobilized antibodies. The methods described are not limited to the particular analytes and antibodies employed in this study but should be useful in characterizing other targets, ligands and supports.
Collapse
Affiliation(s)
- Mary Anne Nelson
- Chemistry Department, University of Nebraska, 704 Hamilton Hall, Lincoln, Nebraska 68588-0304
| | - Annette Moser
- Chemistry Department, University of Nebraska, 704 Hamilton Hall, Lincoln, Nebraska 68588-0304
| | - David S. Hage
- Chemistry Department, University of Nebraska, 704 Hamilton Hall, Lincoln, Nebraska 68588-0304
| |
Collapse
|
43
|
Zhang Z, Liang Y, Yan L, Yan F, Fang S. Protein adsorption materials of the soluble conducting polymer poly(acryloyl chloride)-g-polypyrrole. NEW J CHEM 2010. [DOI: 10.1039/c0nj00013b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
44
|
Estmer Nilsson C, Abbas S, Bennemo M, Larsson A, Hämäläinen M, Frostell-Karlsson Å. A novel assay for influenza virus quantification using surface plasmon resonance. Vaccine 2010; 28:759-66. [DOI: 10.1016/j.vaccine.2009.10.070] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2009] [Revised: 10/02/2009] [Accepted: 10/13/2009] [Indexed: 11/28/2022]
|
45
|
Krishnamoorthy G, Carlen ET, Beusink JB, Schasfoort RBM, van den Berg A. Single injection microarray-based biosensor kinetics. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2009; 1:162-169. [PMID: 32938053 DOI: 10.1039/b9ay00176j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Binding affinity of biomolecular interactions can be directly extracted from measured surface plasmon resonance biosensor sensorgrams by fitting the data to the appropriate model equations. The conventional method for affinity estimation uses a series of analytes and buffers that are injected serially to a single immobilized ligand on the sensing surface, including a regeneration step between each injection, to generate information about the binding behavior. We present an alternative method to estimate the affinity using a single analyte concentration injected to multiple ligand densities in a microarray format. This parameter estimation method eliminates the need for multiple analyte injections and surface regeneration steps, which can be important for applications where there is limited analyte serum, fragile ligand-surface attachment, or the detection of multiple biomolecule interactions. The single analyte injection approach for binding affinity estimation has been demonstrated for two different interactant pairs, β2 microglobulin/anti-β2 microglobulin (β2M) and human IgG/Fab fragments of anti-human IgG (hIgG), where the ligands are printed in a microarray format. Quantitative comparisons between the estimated binding affinities measured with the conventional method are β2M: KD = 1.48 ± 0.28 nM and hIgG: KD = 12.6 ± 0.2 nM and for the single injection method are β2M: KD = 1.52 ± 0.22 nM and hIgG: KD = 12.5 ± 0.6 nM, which are in good agreement in both cases.
Collapse
Affiliation(s)
- Ganeshram Krishnamoorthy
- BIOS Lab-on-a-Chip Group, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500, AE Enschede, The Netherlands.
| | - Edwin T Carlen
- BIOS Lab-on-a-Chip Group, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500, AE Enschede, The Netherlands.
| | - J Bianca Beusink
- BIOS Lab-on-a-Chip Group, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500, AE Enschede, The Netherlands.
| | - Richard B M Schasfoort
- BIOS Lab-on-a-Chip Group, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500, AE Enschede, The Netherlands.
| | - Albert van den Berg
- BIOS Lab-on-a-Chip Group, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500, AE Enschede, The Netherlands.
| |
Collapse
|
46
|
|
47
|
Schiel JE, Hage DS. Kinetic studies of biological interactions by affinity chromatography. J Sep Sci 2009; 32:1507-22. [PMID: 19391173 DOI: 10.1002/jssc.200800685] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The rates at which biological interactions occur can provide important information on the mechanism and behavior of such processes in living systems. This paper will discuss how affinity chromatography can be used as a tool to examine the kinetics of biological interactions. This approach, referred to here as biointeraction chromatography, uses a column with an immobilized binding agent to examine the association or dissociation of this agent with other compounds. The use of HPLC-based affinity columns in kinetic studies has received particular attention in recent years. Advantages of using HPLC with affinity chromatography for this purpose include the ability to reuse the same ligand within a column for a large number of experiments, and the good precision and accuracy of this approach. A number of techniques are available for kinetic studies through the use of affinity columns and biointeraction chromatography. These approaches include plate height measurements, peak profiling, peak fitting, split-peak measurements, and peak decay analysis. The general principles for each of these methods are discussed in this paper and some recent applications of these techniques are presented. The advantages and potential limitations of each approach are also considered.
Collapse
Affiliation(s)
- John E Schiel
- Department of Chemistry, University of Nebraska, Lincoln, NE 68588-0304, USA
| | | |
Collapse
|
48
|
Servoli E, Maniglio D, Aguilar MR, Motta A, Vazquez B, Roman JS, Migliaresi C. Comparative Methods for the Evaluation of Protein Adsorption. Macromol Biosci 2009; 9:661-70. [DOI: 10.1002/mabi.200800301] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
49
|
Romanato F, Lee KH, Kang HK, Ruffato G, Wong CC. Sensitivity enhancement in grating coupled surface plasmon resonance by azimuthal control. OPTICS EXPRESS 2009; 17:12145-12154. [PMID: 19582129 DOI: 10.1364/oe.17.012145] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We present a method for improving the sensing capability of grating coupled surface plasmon resonance (GCSPR) sensors. The grating is rotated azimuthally (phi) until the excitation of double surface plasmon polaritions (SPPs) by a single wavelength is possible. Close to this condition, further tuning of the incident wavelength will merge the double SPPs into a multi-SPP resonance which is angularly broad but spectrally sharp. This is the condition where the momentum vector of the propagating SPP is perpendicular to the incident light momentum. We demonstrate this sensitivity enhancement on a Au grating surface using a dodecanethiol (C12) self-assembled monolayer (SAM). Using this method, a shift in resonance angle as large as 3 degrees can be observed. The simulated sensitivity of this method shows that a sensitivity up to 800 degrees /RIU is achievable, which is one order of magnitude greater than that in a conventional fixed grating (phi = 0 degrees ) as well as the prism-coupled Kretschmann configuration.
Collapse
Affiliation(s)
- F Romanato
- Dep of Physics G Galilei, Padua Univ, 35131 Padua, Italy.
| | | | | | | | | |
Collapse
|
50
|
Kausaite-Minkstimiene A, Ramanaviciene A, Ramanavicius A. Surface plasmon resonance biosensor for direct detection of antibodies against human growth hormone. Analyst 2009; 134:2051-7. [DOI: 10.1039/b907315a] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|