1
|
Lu Z, Ge R, Zheng B, Zheng P. Enzymatic Protein Immobilization for Nanobody Array. Molecules 2024; 29:366. [PMID: 38257279 PMCID: PMC10820937 DOI: 10.3390/molecules29020366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Revised: 01/02/2024] [Accepted: 01/08/2024] [Indexed: 01/24/2024] Open
Abstract
Antibody arrays play a pivotal role in the detection and quantification of biomolecules, with their effectiveness largely dependent on efficient protein immobilization. Traditional methods often use heterobifunctional cross-linking reagents for attaching functional residues in proteins to corresponding chemical groups on the substrate surface. However, this method does not control the antibody's anchoring point and orientation, potentially leading to reduced binding efficiency and overall performance. Another method using anti-antibodies as intermediate molecules to control the orientation can be used but it demonstrates lower efficiency. Here, we demonstrate a site-specific protein immobilization strategy utilizing OaAEP1 (asparaginyl endopeptidase) for building a nanobody array. Moreover, we used a nanobody-targeting enhanced green fluorescent protein (eGFP) as the model system to validate the protein immobilization method for building a nanobody array. Finally, by rapidly enriching eGFP, this method further highlights its potential for rapid diagnostic applications. This approach, characterized by its simplicity, high efficiency, and specificity, offers an advancement in the development of surface-modified protein arrays. It promises to enhance the sensitivity and accuracy of biomolecule detection, paving the way for broader applications in various research and diagnostic fields.
Collapse
Affiliation(s)
| | | | | | - Peng Zheng
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China; (Z.L.); (R.G.); (B.Z.)
| |
Collapse
|
2
|
Fang B, Xiong Q, Duan H, Xiong Y, Lai W. Tailored quantum dots for enhancing sensing performance of lateral flow immunoassay. Trends Analyt Chem 2022. [DOI: 10.1016/j.trac.2022.116754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
3
|
pH-Regulated Strategy and Mechanism of Antibody Orientation on Magnetic Beads for Improving Capture Performance of Staphylococcus Species. Foods 2022; 11:foods11223599. [PMID: 36429188 PMCID: PMC9689862 DOI: 10.3390/foods11223599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 11/04/2022] [Accepted: 11/09/2022] [Indexed: 11/16/2022] Open
Abstract
Immunomagnetic beads (IMBs) have been widely used to capture and isolate target pathogens from complex food samples. The orientation of the antibody immobilized on the surface of magnetic beads (MBs) is closely related to the effective recognition with an antigen. We put forward an available strategy to orient the antibody on the surface of MBs by changing the charged amino group ratio of the reactive amino groups at optimal pH value. Quantum dots labeling antigen assay, antigen-binding fragment (Fab) accessibility assay and lysine mimicking were used for the first time to skillfully illustrate the antibody orientation mechanism. This revealed that the positively charged ε-NH2 group of lysine on the Fc relative to the uncharged amino terminus on Fab was preferentially adsorbed on the surface of MBs with a negatively charged group at pH 8.0, resulting in antigen binding sites of antibody fully exposed. This study contributes to the understanding of the antibody orientation on the surface of MBs and the potential application of IMBs in the separation and detection of pathogenic bacteria in food samples.
Collapse
|
4
|
Development and Validation of Rapid In-House Diagnostic ELISA Kits for Detection of Human Orthopneumovirus in Clinical Samples. Diagnostics (Basel) 2022; 12:diagnostics12040912. [PMID: 35453960 PMCID: PMC9029150 DOI: 10.3390/diagnostics12040912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 03/14/2022] [Accepted: 03/25/2022] [Indexed: 02/01/2023] Open
Abstract
Currently, the standard assay employed to diagnose human orthopneumovirus infection is real-time reverse transcriptase PCR assay (rRT-PCR), a costly and time-consuming procedure that requires the manipulation of infectious viruses. In addition to RT-PCR, serological tests can complement the molecular diagnostic methods and have proven to be important tools in sero-surveillance. In this study, we report the development, optimization, and validation of a novel and rapid in-house diagnostic ELISA kit to detect human orthopneumovirus in clinical samples. We developed three sensitive ELISA formats through the immunization of rats with novel recombinant pPOE-F or pPOE-TF vectors. The two vectors expressed either the full-length (pPOE-F) or the truncated form (pPOE-TF) of the fusion (F) protein. The developed ELISA kits were optimized for coating buffer, capture antibody, blocking buffer, sample antigen, detection antibodies, and peroxidase-conjugated antibody, and validated using 75 rRT-PCR-confirmed nasopharyngeal aspirate (NPA) human orthopneumovirus samples and 25 negative samples collected from hospitalized children during different epidemic seasons between 2014 and 2017. Our results indicate that rats immunized with pPOE-F or pPOE-TF showed significant induction of high levels of MPAs. Validation of the ELISA method was compared to the rRT-PCR and the sensitivity hierarchy of these developed ELISA assays was considered from highest to lowest: indirect competitive inhibition ELISA (93.3%) > indirect antigen-capture ELISA (90.6%) > direct antigen-capture ELISA (86.6%). The development of the rapid in-house diagnostic ELISA kits described in this study demonstrates that a specific, rapid and sensitive test for human orthopneumovirus antigens could be successfully applied to samples collected from hospitalized children during different epidemics and can help in the efficient diagnosis of respiratory syncytial viral infections.
Collapse
|
5
|
Maeda T, Kanamori R, Choi YJ, Taki M, Noda T, Sawada K, Takahashi K. Bio-Interface on Freestanding Nanosheet of Microelectromechanical System Optical Interferometric Immunosensor for Label-Free Attomolar Prostate Cancer Marker Detection. SENSORS 2022; 22:s22041356. [PMID: 35214266 PMCID: PMC8963056 DOI: 10.3390/s22041356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 01/29/2022] [Accepted: 02/06/2022] [Indexed: 11/24/2022]
Abstract
Various biosensors that are based on microfabrication technology have been developed as point-of-care testing devices for disease screening. The Fabry–Pérot interferometric (FPI) surface-stress sensor was developed to improve detection sensitivity by performing label-free biomarker detection as a nanomechanical deflection of a freestanding membrane to adsorb the molecules. However, chemically functionalizing the freestanding nanosheet with excellent stress sensitivity for selective molecular detection may cause the surface chemical reaction to deteriorate the nanosheet quality. In this study, we developed a minimally invasive chemical functionalization technique to create a biosolid interface on the freestanding nanosheet of a microelectromechanical system optical interferometric surface-stress immunosensor. For receptor immobilization, glutaraldehyde cross-linking on the surface of the amino-functionalized parylene membrane reduced the shape variation of the freestanding nanosheet to 1/5–1/10 of the previous study and achieved a yield of 95%. In addition, the FPI surface-stress sensor demonstrated molecular selectivity and concentration dependence for prostate-specific antigen with a dynamic range of concentrations from 100 ag/mL to 1 µg/mL. In addition, the minimum limit of detection of the proposed sensor was 2,000,000 times lower than that of the conventional nanomechanical cantilevers.
Collapse
Affiliation(s)
- Tomoya Maeda
- Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology, Toyohashi 441-8580, Japan; (T.M.); (R.K.); (Y.-J.C.); (M.T.); (T.N.); (K.S.)
| | - Ryoto Kanamori
- Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology, Toyohashi 441-8580, Japan; (T.M.); (R.K.); (Y.-J.C.); (M.T.); (T.N.); (K.S.)
| | - Yong-Joon Choi
- Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology, Toyohashi 441-8580, Japan; (T.M.); (R.K.); (Y.-J.C.); (M.T.); (T.N.); (K.S.)
| | - Miki Taki
- Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology, Toyohashi 441-8580, Japan; (T.M.); (R.K.); (Y.-J.C.); (M.T.); (T.N.); (K.S.)
| | - Toshihiko Noda
- Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology, Toyohashi 441-8580, Japan; (T.M.); (R.K.); (Y.-J.C.); (M.T.); (T.N.); (K.S.)
- Electronics Inspired-Interdisciplinary Research Institute (EIIRIS), Toyohashi University of Technology, Toyohashi 441-8580, Japan
| | - Kazuaki Sawada
- Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology, Toyohashi 441-8580, Japan; (T.M.); (R.K.); (Y.-J.C.); (M.T.); (T.N.); (K.S.)
- Electronics Inspired-Interdisciplinary Research Institute (EIIRIS), Toyohashi University of Technology, Toyohashi 441-8580, Japan
| | - Kazuhiro Takahashi
- Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology, Toyohashi 441-8580, Japan; (T.M.); (R.K.); (Y.-J.C.); (M.T.); (T.N.); (K.S.)
- Correspondence: ; Tel.: +81-532-44-6740
| |
Collapse
|
6
|
Linkuvienė V, Ross EL, Crawford L, Weiser SE, Man D, Kay S, Kolhe P, Carpenter JF. Effects of transportation of IV bags containing protein formulations via hospital pneumatic tube system: Particle characterization by multiple methods. J Pharm Sci 2022; 111:1024-1039. [DOI: 10.1016/j.xphs.2022.01.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 01/12/2022] [Accepted: 01/12/2022] [Indexed: 01/01/2023]
|
7
|
Pan F, Aaron Lau KH, Messersmith PB, Lu JR, Zhao X. Interfacial Assembly Inspired by Marine Mussels and Antifouling Effects of Polypeptoids: A Neutron Reflection Study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:12309-12318. [PMID: 32970448 PMCID: PMC7586401 DOI: 10.1021/acs.langmuir.0c02247] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 09/24/2020] [Indexed: 06/11/2023]
Abstract
Polypeptoid-coated surfaces and many surface-grafted hydrophilic polymer brushes have been proven efficient in antifouling-the prevention of nonspecific biomolecular adsorption and cell attachment. Protein adsorption, in particular, is known to mediate subsequent cell-surface interactions. However, the detailed antifouling mechanism of polypeptoid and other polymer brush coatings at the molecular level is not well understood. Moreover, most adsorption studies focus only on measuring a single adsorbed mass value, and few techniques are capable of characterizing the hydrated in situ layer structure of either the antifouling coating or adsorbed proteins. In this study, interfacial assembly of polypeptoid brushes with different chain lengths has been investigated in situ using neutron reflection (NR). Consistent with past simulation results, NR revealed a common two-step structure for grafted polypeptoids consisting of a dense inner region that included a mussel adhesive-inspired oligopeptide for grafting polypeptoid chains and a highly hydrated upper region with very low polymer density (molecular brush). Protein adsorption was studied with human serum albumin (HSA) and fibrinogen (FIB), two common serum proteins of different sizes but similar isoelectric points (IEPs). In contrast to controls, we observed higher resistance by grafted polypeptoid against adsorption of the larger FIB, especially for longer chain lengths. Changing the pH to close to the IEPs of the proteins, which generally promotes adsorption, also did not significantly affect the antifouling effect against FIB, which was corroborated by atomic force microscopy imaging. Moreover, NR enabled characterization of the in situ hydrated layer structures of the polypeptoids together with proteins adsorbed under selected conditions. While adsorption on bare SiO2 controls resulted in surface-induced protein denaturation, this was not observed on polypeptoids. Our current results therefore highlight the detailed in situ view that NR may provide for characterizing protein adsorption on polymer brushes as well as the excellent antifouling behavior of polypeptoids.
Collapse
Affiliation(s)
- Fang Pan
- School
of Pharmacy, Changzhou University, Changzhou 213164, China
- School
of Physics & Astronomy, University of
Manchester, Manchester M13 9PL, U.K.
| | - King Hang Aaron Lau
- Department
of Pure & Applied Chemistry, University
of Strathclyde, Glasgow G1 1XL, U.K.
| | - Phillip B. Messersmith
- Department
of Materials Science and Engineering, Department of Bioengineering, University of California−Berkeley, Berkeley California 94720, United States
| | - Jian R. Lu
- School
of Physics & Astronomy, University of
Manchester, Manchester M13 9PL, U.K.
| | - Xiubo Zhao
- School
of Pharmacy, Changzhou University, Changzhou 213164, China
- Department
of Chemical and Biological Engineering, University of Sheffield, Sheffield S1 3JD, U.K.
| |
Collapse
|
8
|
Bashth OS, Elkhodiry MA, Laroche G, Hoesli CA. Surface grafting of Fc-binding peptides as a simple platform to immobilize and identify antibodies that selectively capture circulating endothelial progenitor cells. Biomater Sci 2020; 8:5465-5475. [PMID: 32902522 DOI: 10.1039/d0bm00650e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Antibody surface immobilization is a promising strategy to capture cells of interest from circulating fluids in vitro and in vivo. An application of particular interest in vascular interventions is to capture endothelial progenitor cells (EPCs) on the surface of stents to accelerate endothelialization. The clinical impact of EPC capture stents has been limited by the lack of efficient selective cell capture. Here, we describe a simple method to immobilize a variety of immunoglobulin G antibodies through their fragment crystallizable (Fc) regions via surface-conjugated RRGW peptides for cell capture applications. As an EPC capture model, peripheral blood endothelial colony-forming cells suspended in cell culture medium with up to 70% serum were captured by immobilized anti-CD144, anti-CD34 or anti-CD309 antibodies under laminar flow. The endothelial colony-forming cells were successfully enriched from a mixture with peripheral blood mononuclear cells using surfaces with anti-CD309 but not anti-CD45. This antibody immobilization approach holds great promise to engineer vascular biomaterials with improved EPC capture potential. The ease of immobilizing different antibodies using the same Fc-binding peptide surface grafting chemistry renders this platform suitable to screen antibodies that maximize cell capture efficiency and selectivity.
Collapse
Affiliation(s)
- Omar S Bashth
- Department of Chemical Engineering, McGill University, Canada.
| | | | - Gaétan Laroche
- Centre de Recherche du CHU de Québec & Département de Génie des Mines, des Matériaux et de la Métallurgie, Université Laval, Canada
| | - Corinne A Hoesli
- Department of Chemical Engineering, McGill University, Canada. and Department of Biomedical Engineering, McGill University, Canada
| |
Collapse
|
9
|
Ghoshdastidar S, Gangula A, Kainth J, Saranathan S, Elangovan A, Afrasiabi Z, Hainsworth DP, Upendran A, Kannan R. Plate-Adherent Nanosubstrate for Improved ELISA of Small Molecules: A Proof of Concept Study. Anal Chem 2020; 92:10952-10956. [DOI: 10.1021/acs.analchem.0c01441] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
| | | | | | | | | | - Zahra Afrasiabi
- Soka University of America, Aliso Viejo, California 92656, United States
| | | | | | | |
Collapse
|
10
|
Recent Advances in Studying Interfacial Adsorption of Bioengineered Monoclonal Antibodies. Molecules 2020; 25:molecules25092047. [PMID: 32353995 PMCID: PMC7249052 DOI: 10.3390/molecules25092047] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 03/13/2020] [Accepted: 04/23/2020] [Indexed: 11/24/2022] Open
Abstract
Monoclonal antibodies (mAbs) are an important class of biotherapeutics; as of 2020, dozens are commercialized medicines, over a hundred are in clinical trials, and many more are in preclinical developmental stages. Therapeutic mAbs are sequence modified from the wild type IgG isoforms to varying extents and can have different intrinsic structural stability. For chronic treatments in particular, high concentration (≥ 100 mg/mL) aqueous formulations are often preferred for at-home administration with a syringe-based device. MAbs, like any globular protein, are amphiphilic and readily adsorb to interfaces, potentially causing structural deformation and even unfolding. Desorption of structurally perturbed mAbs is often hypothesized to promote aggregation, potentially leading to the formation of subvisible particles and visible precipitates. Since mAbs are exposed to numerous interfaces during biomanufacturing, storage and administration, many studies have examined mAb adsorption to different interfaces under various mitigation strategies. This review examines recent published literature focusing on adsorption of bioengineered mAbs under well-defined solution and surface conditions. The focus of this review is on understanding adsorption features driven by distinct antibody domains and on recent advances in establishing model interfaces suitable for high resolution surface measurements. Our summary highlights the need to further understand the relationship between mAb interfacial adsorption and desorption, solution aggregation, and product instability during fill-finish, transport, storage and administration.
Collapse
|
11
|
Huang X, Townley HE. An Assessment of Mesoporous Silica Nanoparticle Architectures as Antigen Carriers. Pharmaceutics 2020; 12:E294. [PMID: 32213995 PMCID: PMC7151194 DOI: 10.3390/pharmaceutics12030294] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 03/19/2020] [Accepted: 03/20/2020] [Indexed: 12/25/2022] Open
Abstract
Mesoporous silica nanoparticles (MSNPs) have the potential to be used as antigen carriers due to their high surface areas and highly ordered pore network. We investigated the adsorption and desorption of diphtheria toxoid as a proof-of-concept. Two series of nanoparticles were prepared-(i) small pores (SP) (<10 nm) and (ii) large pores (LP) (>10 nm). SBA-15 was included as a comparison since this is commercially available and has been used in a large number of studies. External diameters of the particles ranged from 138 to 1509 nm, surface area from 632 to 1110 m2/g and pore size from 2.59 to 16.48 nm. Antigen loading was assessed at a number of different ratios of silica-to-antigen and at 4 °C, 20 °C and 37 °C. Our data showed that protein adsorption by the SP series was in general consistently lower than that shown by the large pore series. Unloading was then examined at 4 °C, 20 °C and 37 °C and a pH 1.2, 4.5, 6.8 and 7.4. There was a trend amongst the LP particles towards the smallest pores showing the lowest release of antigen. The stability of the MSNP: antigen complex was tested at two different storage temperatures, and storage in solution or after lyophilization. After 6 months there was negligible release from any of the particles under any of the storage conditions. The particles were also shown not to cause hemolysis.
Collapse
Affiliation(s)
- Xinyue Huang
- Nuffield Department of Women’s and Reproductive Health, Oxford University, John Radcliffe Hospital, Oxford OX3 9DU, UK;
| | - Helen E Townley
- Nuffield Department of Women’s and Reproductive Health, Oxford University, John Radcliffe Hospital, Oxford OX3 9DU, UK;
- Department of Engineering Science, Oxford University, Parks Road, Oxford OX1 3PJ, UK
| |
Collapse
|
12
|
Marques AC, Costa PJ, Velho S, Amaral MH. Functionalizing nanoparticles with cancer-targeting antibodies: A comparison of strategies. J Control Release 2020; 320:180-200. [PMID: 31978444 DOI: 10.1016/j.jconrel.2020.01.035] [Citation(s) in RCA: 146] [Impact Index Per Article: 36.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 01/17/2020] [Accepted: 01/18/2020] [Indexed: 01/07/2023]
Abstract
Standard cancer therapies sometimes fail to deliver chemotherapeutic drugs to tumor cells in a safe and effective manner. Nanotechnology takes the lead in providing new therapeutic options for cancer due to major potential for selective targeting and controlled drug release. Antibodies and antibody fragments are attracting much attention as a source of targeting ligands to bind specific receptors that are overexpressed on cancer cells. Therefore, researchers are devoting time and effort to develop targeting strategies based on nanoparticles functionalized with antibodies, which hold great promise to enhance therapeutic efficacy and circumvent severe side effects. Several methods have been described to immobilize antibodies on the surface of nanoparticles. However, selecting the most appropriate for each application is challenging but also imperative to preserve antigen binding ability and yield stable antibody-conjugated nanoparticles. From this perspective, we aim to provide considerable knowledge on the most widely used methods of functionalization that can be helpful for decision-making and design of conjugation protocols as well. This review summarizes adsorption, covalent conjugation (carbodiimide, maleimide and "click" chemistries) and biotin-avidin interaction, while discussing the advantages, limitations and relevant therapeutic approaches currently under investigation.
Collapse
Affiliation(s)
- A C Marques
- UCIBIO, REQUIMTE, MEDTECH, Laboratory of Pharmaceutical Technology, Department of Drug Sciences, Faculty of Pharmacy, University of Porto (FFUP), R. Jorge de Viterbo Ferreira 228, 4050-313 Porto, Portugal.
| | - P J Costa
- UCIBIO, REQUIMTE, MEDTECH, Laboratory of Pharmaceutical Technology, Department of Drug Sciences, Faculty of Pharmacy, University of Porto (FFUP), R. Jorge de Viterbo Ferreira 228, 4050-313 Porto, Portugal
| | - S Velho
- i3S - Instituto de Investigação e Inovação em Saúde, University of Porto, R. Alfredo Allen 208, 4200-135 Porto, Portugal; IPATIMUP - Institute of Molecular Pathology and Immunology of the University of Porto, R. Júlio Amaral de Carvalho 45, 4200-135 Porto, Portugal
| | - M H Amaral
- UCIBIO, REQUIMTE, MEDTECH, Laboratory of Pharmaceutical Technology, Department of Drug Sciences, Faculty of Pharmacy, University of Porto (FFUP), R. Jorge de Viterbo Ferreira 228, 4050-313 Porto, Portugal
| |
Collapse
|
13
|
Barbosa AI, Barreto AS, Reis NM. Transparent, Hydrophobic Fluorinated Ethylene Propylene Offers Rapid, Robust, and Irreversible Passive Adsorption of Diagnostic Antibodies for Sensitive Optical Biosensing. ACS APPLIED BIO MATERIALS 2019; 2:2780-2790. [PMID: 35030812 DOI: 10.1021/acsabm.9b00214] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Current literature data is scarce and somehow contradictory in respect to the suitability of "nonstick" fluoropolymer surfaces for immobilization of biomolecules. We have previously shown empirically that transparent Teflon fluorinated ethylene propylene (FEP) offers rapid and sensitive optical biosensing of clinically relevant biomarkers. This study shows for the first time a comprehensive experimental analysis of passive adsorption of diagnostic IgG antibodies on actual Teflon FEP microfluidic strips. Full equilibrium isotherms and kinetics for passive adsorption were studied and modeled employing a protein titration method using hundreds of multibore microfluidic strips for a range of temperatures, pH, ionic strengths, and inner diameters, using both polyclonal and monoclonal antibody systems. Results were benchmarked against other plastic hydrophobic and glass hydrophilic capillary surfaces. For the first time, it was shown quantitatively that the hydrophobicity of fluoropolymer surfaces encourages the passive adsorption of diagnostic antibodies for biosensing and is insensitive to the temperature of incubation and to ionic buffer strength. The mass of captured antigen increased with increasing antibody surface coverage up to ∼400 ng/cm2, with an optimal adsorbed antibody activity for 45-69% of full monolayer coverage, matching results of other biosensing surfaces. The equilibrium was reached fast, within 5-10 min, and surprisingly both the kinetics and equilibrium of antibody adsorption were dependent on the inner diameter of microcapillaries. This is a novel and relevant result that will generally impact on the design of miniaturized microfluidic biosensing devices. The antibody surface densities obtained with hydrophobic plastic surfaces were 2- to 4-fold lower than for a hydrophilic, glass surface, however the former presented a monolayered adsorption with a higher level of irreversibility, as shown by the adsorption and desorption rates around 1 order of magnitude smaller than for glass, which is highly desirable for biosensing with surface-coated biomolecules.
Collapse
Affiliation(s)
- Ana Isabel Barbosa
- Department of Chemical Engineering, Loughborough University, Loughborough, Leicestershire LE11 3TU, United Kingdom
| | - Augusto Sampaio Barreto
- Department of Chemical Engineering, Loughborough University, Loughborough, Leicestershire LE11 3TU, United Kingdom
| | - Nuno Miguel Reis
- Department of Chemical Engineering, Loughborough University, Loughborough, Leicestershire LE11 3TU, United Kingdom.,Department of Chemical Engineering, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom
| |
Collapse
|
14
|
Ruiz G, Tripathi K, Okyem S, Driskell JD. pH Impacts the Orientation of Antibody Adsorbed onto Gold Nanoparticles. Bioconjug Chem 2019; 30:1182-1191. [DOI: 10.1021/acs.bioconjchem.9b00123] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Guadalupe Ruiz
- Department of Chemistry, Illinois State University, Normal, Illinois 61790, United States
| | - Kiran Tripathi
- Department of Chemistry, Illinois State University, Normal, Illinois 61790, United States
| | - Samuel Okyem
- Department of Chemistry, Illinois State University, Normal, Illinois 61790, United States
| | - Jeremy D. Driskell
- Department of Chemistry, Illinois State University, Normal, Illinois 61790, United States
| |
Collapse
|
15
|
Li Z, Pan F, Li R, Pambou E, Hu X, Ruane S, Ciumac D, Li P, Welbourn RJL, Webster JRP, Bishop SM, Narwal R, van der Walle CF, Lu JR. Coadsorption of a Monoclonal Antibody and Nonionic Surfactant at the SiO 2/Water Interface. ACS APPLIED MATERIALS & INTERFACES 2018; 10:44257-44266. [PMID: 30500160 DOI: 10.1021/acsami.8b16832] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
During the formulation of therapeutic monoclonal antibodies (mAbs), nonionic surfactants are commonly added to attenuate structural rearrangement caused by adsorption/desorption at interfaces during processing, shipping, and storage. We examined the adsorption of a mAb (COE-3) at the SiO2/water interface in the presence of pentaethylene glycol monododecyl ether (C12E5), polysorbate 80 (PS80-20EO), and a polysorbate 80 analogue with seven ethoxylates (PS80-7EO). Spectroscopic ellipsometry was used to follow COE-3 dynamic adsorption, and neutron reflection was used to determine interfacial structure and composition. Neither PS80-20EO nor C12E5 had a notable affinity for COE-3 or the interface under the conditions studied and thus did not prevent COE-3 adsorption. In contrast, PS80-7EO did coadsorb but did not influence the dynamic process or the equilibrated amount of absorbed COE-3. Near equilibration, COE-3 underwent structural rearrangement and PS80-7EO started to bind the COE-3 interfacial layer and subsequently formed a well-defined surfactant bilayer via self-assembly. The resultant interfacial layer comprised an inner mAb layer of about 70 Å thickness and an outer surfactant layer of a further 70 Å, with distinct transitional regions across the mAb-surfactant and surfactant-bulk water boundaries. Once formed, such interfacial layers were very robust and worked to prevent further mAb adsorption, desorption, and structural rearrangement. Such robust interfacial layers could be anticipated to exist for formulated mAbs stored in type II glass vials; further research is required to understand the behavior of these layers for siliconized glass syringes.
Collapse
Affiliation(s)
- Zongyi Li
- Biological Physics Laboratory, School of Physics and Astronomy , University of Manchester , Oxford Road, Schuster Building , Manchester M13 9PL , U.K
| | - Fang Pan
- Biological Physics Laboratory, School of Physics and Astronomy , University of Manchester , Oxford Road, Schuster Building , Manchester M13 9PL , U.K
| | - Ruiheng Li
- Biological Physics Laboratory, School of Physics and Astronomy , University of Manchester , Oxford Road, Schuster Building , Manchester M13 9PL , U.K
| | - Elias Pambou
- Biological Physics Laboratory, School of Physics and Astronomy , University of Manchester , Oxford Road, Schuster Building , Manchester M13 9PL , U.K
| | - Xuzhi Hu
- Biological Physics Laboratory, School of Physics and Astronomy , University of Manchester , Oxford Road, Schuster Building , Manchester M13 9PL , U.K
| | - Sean Ruane
- Biological Physics Laboratory, School of Physics and Astronomy , University of Manchester , Oxford Road, Schuster Building , Manchester M13 9PL , U.K
| | - Daniela Ciumac
- Biological Physics Laboratory, School of Physics and Astronomy , University of Manchester , Oxford Road, Schuster Building , Manchester M13 9PL , U.K
| | - Peixun Li
- ISIS Neutron Facility , STFC , Chilton , Didcot OX11 0QZ , U.K
| | | | | | - Steven M Bishop
- MedImmune LLC , Gaithersburg , Maryland 20878 , United States
| | | | | | - Jian Ren Lu
- Biological Physics Laboratory, School of Physics and Astronomy , University of Manchester , Oxford Road, Schuster Building , Manchester M13 9PL , U.K
| |
Collapse
|
16
|
Lee S, Eom G, Yoon I, Park S, Kook G, Kim MK, Kim H, Seo JW, Lee HJ. Capacitive Micromachined Ultrasonic Transducer (CMUT)-based Biosensor for Detection of Low Concentration Neuropeptide. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2018; 2018:2897-2900. [PMID: 30441006 DOI: 10.1109/embc.2018.8512957] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Accurate detection of neuropeptides in cerebrospinal fluid (CSF) plays an important role in both indepth studies and early diagnosis of neurological diseases. Here, we report a biosensor based on Capacitive Micromachined Ultrasonic Transducer (CMUT) which is capable of detecting low concentrations (pg $\sim $ ng/ml) of a neuropeptide involved with the progression of Alzheimer's diseases, somatostatin (SST). A 10-MHz CMUT was fabricated and utilized as a physical resonant sensor which detects the change in the concentration of analyte through the mass-loading mechanism. The resonant plate was sequentially coated with protein G and antibodies to provide specificity to SST; Cysteine-tagged protein G layer enables controlled immobilization of antibodies in a welloriented manner. The change in the resonant frequency of the CMUT sensor was measured after incubating the sensor in various concentrations of SST. The significant shifts in the resonant frequency were observed for SST concentrations in the range of 10 pg/ml $\sim 1$ ng/ml. Compared to the previously reported biosensors developed for SST detection, our sensor shows discernable responses for SST that are $\sim 6$ orders of magnitude lower in concentration. Thus, this work demonstrates the potential of the CMUT resonant sensor as a promising biosensor platform for detection of neuropeptides involved with neurodegenerative diseases that often exist in low concentrations in CSF.
Collapse
|
17
|
Ding S, Das SR, Brownlee BJ, Parate K, Davis TM, Stromberg LR, Chan EK, Katz J, Iverson BD, Claussen JC. CIP2A immunosensor comprised of vertically-aligned carbon nanotube interdigitated electrodes towards point-of-care oral cancer screening. Biosens Bioelectron 2018; 117:68-74. [DOI: 10.1016/j.bios.2018.04.016] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Accepted: 04/07/2018] [Indexed: 11/28/2022]
|
18
|
Film bulk acoustic resonators (FBARs) as biosensors: A review. Biosens Bioelectron 2018; 116:1-15. [DOI: 10.1016/j.bios.2018.05.028] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Revised: 05/08/2018] [Accepted: 05/16/2018] [Indexed: 01/01/2023]
|
19
|
Lou D, Fan L, Cui Y, Zhu Y, Gu N, Zhang Y. Fluorescent Nanoprobes with Oriented Modified Antibodies to Improve Lateral Flow Immunoassay of Cardiac Troponin I. Anal Chem 2018; 90:6502-6508. [PMID: 29697255 DOI: 10.1021/acs.analchem.7b05410] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Performance of nanoprobes can often determine the detection level of Lateral immunochromatography. Traditional probes were limited by the quantity and orientation of antibodies, immune activity of the Fab region or binding strength between protein and substrate. This study developed a new efficient and robust technology to construct fluorescent nanoprobes with oriented modified antibodies, based on specific binding of the Fc region of antibody with streptococcal protein G (SPG) on the surface of polystyrene microspheres (MS) and subsequent covalent cross-linking at binding sites to firm them. Lateral flow immunoassay using these probes was applied for the detection of cardiac troponin I (cTnI). The significantly improved detection sensitivity demonstrated that antibody orientation on MS surfaces effectively enhanced immunological activities of probes compared with random immobilizing methods. Furthermore, performance evaluation results of lateral flow test strips met clinical requirements perfectly, including limit of detection (0.032 ng/mL), linearity ( R > 0.99), repeatability (CV < 10%), correlation ( R > 0.99), and heat aging stability. This research also employed heterophilic blocking reagent (HBR) to actively block redundant binding sites of SPG for the first time in order to eliminate false positive interferences, improving the sensitivity and precision of test results further.
Collapse
Affiliation(s)
- Doudou Lou
- State Key Laboratory of Bioelectronics, Jiangsu Key Laboratory for Biomaterials and Devices, School of Biological Science and Medical Engineering and Collaborative Innovation Center of Suzhou Nano Science and Technology , Southeast University , Nanjing , People's Republic of China
| | - Lin Fan
- State Key Laboratory of Bioelectronics, Jiangsu Key Laboratory for Biomaterials and Devices, School of Biological Science and Medical Engineering and Collaborative Innovation Center of Suzhou Nano Science and Technology , Southeast University , Nanjing , People's Republic of China
| | - Yan Cui
- Nanjing Nanoeast Biotech Co., Ltd. , Nanjing , People's Republic of China
| | - Yefei Zhu
- Laboratory Medicine Center , The Second Affiliated Hospital of Nanjing Medical University , Nanjing , People's Republic of China
| | - Ning Gu
- State Key Laboratory of Bioelectronics, Jiangsu Key Laboratory for Biomaterials and Devices, School of Biological Science and Medical Engineering and Collaborative Innovation Center of Suzhou Nano Science and Technology , Southeast University , Nanjing , People's Republic of China
| | - Yu Zhang
- State Key Laboratory of Bioelectronics, Jiangsu Key Laboratory for Biomaterials and Devices, School of Biological Science and Medical Engineering and Collaborative Innovation Center of Suzhou Nano Science and Technology , Southeast University , Nanjing , People's Republic of China
| |
Collapse
|
20
|
Pan F, Li Z, Leyshon T, Rouse D, Li R, Smith C, Campana M, Webster JRP, Bishop SM, Narwal R, van der Walle CF, Warwicker J, Lu JR. Interfacial Adsorption of Monoclonal Antibody COE-3 at the Solid/Water Interface. ACS APPLIED MATERIALS & INTERFACES 2018; 10:1306-1316. [PMID: 29215260 DOI: 10.1021/acsami.7b13332] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Spectroscopic ellipsometry (SE) and neutron reflection (NR) data for the adsorption of a monoclonal antibody (mAb, termed COE-3, pI 8.44) at the bare SiO2/water interface are compared here to the simulations based on Derjaguin-Landau-Verwey-Overbeek theory. COE-3 adsorption was characterized by an initial rapid increase in the surface-adsorbed amount (Γ) followed by a plateau. Only the initial rate of the increase in Γ was strongly correlated with the bulk concentration (0.002-0.2 mg/mL), with Γ at the plateau being about 2.2 mg/m2 (pH 5.5). Simulations captured COE-3 adsorption at equilibrium most accurately, the point at which the outgoing flux of molecules within the adsorbed plane matched the adsorption flux. Increasing the buffer pH from 5.5 to 9 increased Γ at equilibrium to ∼3 mg/m2 (0.02 mg/mL COE-3), revealing a dominant role for lateral repulsion between adsorbed mAb molecules. In contrast, increasing the buffer ionic strength (pH 6) reduced Γ, which was captured by simulations accounting for electrostatic screening by ions, in addition to mAb/SiO2 attractive forces and lateral repulsion. NR data at the same bulk concentrations corroborated the SE data, albeit with slightly higher Γ due to longer adsorption times for data acquisition; for example, at pH 9, Γ was 3.6 mg/m2 (0.02 mg/mL COE-3), equivalent to a relatively high volume fraction of 0.5. An adsorbed monolayer with a thickness of 50-52 Å was consistently determined by NR, corresponding to the short axial lengths of fragment antigen-binding and fragment crystallization and implying minimal structural perturbation. Thus, the simulations enabled a mechanistic interpretation of the experimental data of mAb adsorption at the SiO2/water interface.
Collapse
Affiliation(s)
- Fang Pan
- Biological Physics Laboratory, School of Physics and Astronomy, University of Manchester , Oxford Road, Schuster Building, Manchester M13 9PL, U.K
| | - Zongyi Li
- Biological Physics Laboratory, School of Physics and Astronomy, University of Manchester , Oxford Road, Schuster Building, Manchester M13 9PL, U.K
| | - Thomas Leyshon
- Biological Physics Laboratory, School of Physics and Astronomy, University of Manchester , Oxford Road, Schuster Building, Manchester M13 9PL, U.K
| | - Dominic Rouse
- Biological Physics Laboratory, School of Physics and Astronomy, University of Manchester , Oxford Road, Schuster Building, Manchester M13 9PL, U.K
| | - Ruiheng Li
- Biological Physics Laboratory, School of Physics and Astronomy, University of Manchester , Oxford Road, Schuster Building, Manchester M13 9PL, U.K
| | - Charles Smith
- Biological Physics Laboratory, School of Physics and Astronomy, University of Manchester , Oxford Road, Schuster Building, Manchester M13 9PL, U.K
| | - Mario Campana
- ISIS Neutron Facility, STFC, Chilton , Didcot OX11 0QZ, U.K
| | | | - Steven M Bishop
- Formulation Sciences, MedImmune LLC , Gaithersburg, Maryland 20878, United States
| | - Rojaramani Narwal
- Formulation Sciences, MedImmune LLC , Gaithersburg, Maryland 20878, United States
| | | | - Jim Warwicker
- School of Chemistry, University of Manchester , Oxford Road, Chemistry Building, Manchester M13 9PL, U.K
| | - Jian Ren Lu
- Biological Physics Laboratory, School of Physics and Astronomy, University of Manchester , Oxford Road, Schuster Building, Manchester M13 9PL, U.K
| |
Collapse
|
21
|
Ammonia plasma-treated electrospun polyacrylonitryle nanofibrous membrane: the robust substrate for protein immobilization through glutaraldhyde coupling chemistry for biosensor application. Sci Rep 2017; 7:9441. [PMID: 28842632 PMCID: PMC5573414 DOI: 10.1038/s41598-017-10040-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Accepted: 08/03/2017] [Indexed: 11/08/2022] Open
Abstract
The surface of polyacrylonitrile electrospun nanofibrous membrane (PAN NFM) was aminated by the ammonia plasma treatment. The content of amine groups has been estimated for different time of plasma treatment. The newly generated amine groups were successfully activated by glutaraldehyde (Ga) for the covalent attachment of the protein molecules on the NFM surface. Bio-functionalization of ammonia plasma treated PAN NFM was carried out by the primary antibodies (Ab) immobilization as a protein model through Ga coupling chemistry. For comparison, the immobilization of Ab was also performed through physical interactions. Attenuated total reflection-fourier transform infrared spectroscopy (ATR-FTIR) was used for the characterization of surface functional groups of PAN NFM after different modifications. The surface morphology of the NFM after immobilization was characterized using scanning electron microscope (SEM). The efficacy of Ab immobilization was estimated by enzyme-linked immuno sorbent assay (ELISA) method. X- Ray photoelectron spectroscopy (XPS) was performed to confirm the covalent immobilization of Ab on the modified PAN NFM. Results show that ammonia plasma treatment effectively increased the amount of Ab immobilization through Ga coupling chemistry. Our findings suggest that this is a versatile model for the preparation of stable bio-functionalized NFM which is applicable in different field of biomedical science.
Collapse
|
22
|
Orientation and characterization of immobilized antibodies for improved immunoassays (Review). Biointerphases 2017; 12:02D301. [DOI: 10.1116/1.4978435] [Citation(s) in RCA: 202] [Impact Index Per Article: 28.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
|
23
|
Mazzer AR, Clifton LA, Perevozchikova T, Butler PD, Roberts CJ, Bracewell DG. Neutron reflectivity measurement of protein A-antibody complex at the solid-liquid interface. J Chromatogr A 2017; 1499:118-131. [PMID: 28410804 PMCID: PMC5408906 DOI: 10.1016/j.chroma.2017.03.084] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Revised: 03/15/2017] [Accepted: 03/30/2017] [Indexed: 01/05/2023]
Abstract
The orientation of IgG4 adsorbed at the solid-liquid interface was probed. A chromatography resin was mimicked by attaching protein A to a silica surface. Neutron reflectivity was used to measure protein A and adsorbed IgG structures. Protein A-modified silica was blocked with either BSA or PEG before IgG adsorption. Adsorbed IgG extended up to 230 Å from the surface, depending on blocking strategy.
Chromatography is a ubiquitous unit operation in the purification of biopharmaceuticals yet few studies have addressed the biophysical characterisation of proteins at the solution-resin interface. Chromatography and other adsorption and desorption processes have been shown to induce protein aggregation which is undesirable in biopharmaceutical products. In order to advance understanding of how adsorption processes might impact protein stability, neutron reflectivity was used to characterise the structure of adsorbed immunoglobulin G (IgG) on model surfaces. In the first model system, IgG was adsorbed directly to silica and demonstrated a side-on orientation with high surface contact. A maximum dimension of 60 Å in the surface normal direction and high density surface coverage were observed under pH 4.1 conditions. In chromatography buffers, pH was found to influence IgG packing density and orientation at the solid-liquid interface. In the second model system, which was designed to mimic an affinity chromatography surface, protein A was attached to a silica surface to produce a configuration representative of a porous glass chromatography resin. Interfacial structure was probed during sequential stages from ligand attachment, through to IgG binding and elution. Adsorbed IgG structures extended up to 250 Å away from the surface and showed dependence on surface blocking strategies. The data was suggestive of two IgG molecules bound to protein A with a somewhat skewed orientation and close proximity to the silica surface. The findings provide insight into the orientation of adsorbed antibody structures under conditions encountered during chromatographic separations.
Collapse
Affiliation(s)
- Alice R Mazzer
- Dept. Biochemical Engineering, University College London, Gower Street, London, WC1E 6BT, UK
| | - Luke A Clifton
- ISIS, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot, Oxon, OX11 0QX, UK
| | - Tatiana Perevozchikova
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE, 19716, USA
| | - Paul D Butler
- National Institute of Standards and Technology, 100 Bureau Drive, Bldg. 235, Gaithersburg, MD 20899-8562, USA
| | - Christopher J Roberts
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE, 19716, USA
| | - Daniel G Bracewell
- Dept. Biochemical Engineering, University College London, Gower Street, London, WC1E 6BT, UK.
| |
Collapse
|
24
|
Shen M, Rusling J, Dixit CK. Site-selective orientated immobilization of antibodies and conjugates for immunodiagnostics development. Methods 2017; 116:95-111. [PMID: 27876681 PMCID: PMC5374010 DOI: 10.1016/j.ymeth.2016.11.010] [Citation(s) in RCA: 114] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Revised: 11/16/2016] [Accepted: 11/17/2016] [Indexed: 01/11/2023] Open
Abstract
Immobilized antibody systems are the key to develop efficient diagnostics and separations tools. In the last decade, developments in the field of biomolecular engineering and crosslinker chemistry have greatly influenced the development of this field. With all these new approaches at our disposal, several new immobilization methods have been created to address the main challenges associated with immobilized antibodies. Few of these challenges that we have discussed in this review are mainly associated to the site-specific immobilization, appropriate orientation, and activity retention. We have discussed the effect of antibody immobilization approaches on the parameters on the performance of an immunoassay.
Collapse
Affiliation(s)
- Min Shen
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269-3060
| | - James Rusling
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269-3060
- Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269-3136
- Department of Cell Biology, University of Connecticut Health Center, Farmington, Connecticut 060
- School of Chemistry, National University of Ireland at Galway, Galway, Ireland
| | - Chandra K Dixit
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269-3060
| |
Collapse
|
25
|
Lee KT, Coffey JW, Robinson KJ, Muller DA, Grøndahl L, Kendall MAF, Young PR, Corrie SR. Investigating the Effect of Substrate Materials on Wearable Immunoassay Performance. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:773-782. [PMID: 28006902 DOI: 10.1021/acs.langmuir.6b03933] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Immunoassays are ubiquitous across research and clinical laboratories, yet little attention is paid to the effect of the substrate material on the assay performance characteristics. Given the emerging interest in wearable immunoassay formats, investigations into substrate materials that provide an optimal mix of mechanical and bioanalytical properties are paramount. In the course of our research in developing wearable immunoassays which can penetrate skin to selectively capture disease antigens from the underlying blood vessels, we recently identified significant differences in immunoassay performance between gold and polycarbonate surfaces, even with a consistent surface modification procedure. We observed significant differences in PEG density, antibody immobilization, and nonspecific adsorption between the two substrates. Despite a higher PEG density formed on gold-coated surfaces than on amine-functionalized polycarbonate, the latter revealed a higher immobilized capture antibody density and lower nonspecific adsorption, leading to improved signal-to-noise ratios and assay sensitivities. The major conclusion from this study is that in designing wearable bioassays or biosensors, the design and its effect on the antifouling polymer layer can significantly affect the assay performance in terms of analytical specificity and sensitivity.
Collapse
Affiliation(s)
| | | | | | | | | | - Mark A F Kendall
- Australian Infectious Diseases Research Centre, St. Lucia, Queensland 4067, Australia
- Faculty of Medicine and Biomedical Sciences, Royal Brisbane and Women's Hospital , Herston, Queensland 4029, Australia
| | - Paul R Young
- Australian Infectious Diseases Research Centre, St. Lucia, Queensland 4067, Australia
| | - Simon R Corrie
- Australian Infectious Diseases Research Centre, St. Lucia, Queensland 4067, Australia
- Department of Chemical Engineering, ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash University , Clayton, Victoria 3800, Australia
| |
Collapse
|
26
|
Zhan S, Huang X, Chen R, Li J, Xiong Y. Novel fluorescent ELISA for the sensitive detection of zearalenone based on H2O2-sensitive quantum dots for signal transduction. Talanta 2016; 158:51-56. [PMID: 27343577 DOI: 10.1016/j.talanta.2016.05.035] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Revised: 05/09/2016] [Accepted: 05/13/2016] [Indexed: 10/21/2022]
Abstract
A direct competitive fluorescent enzyme-linked immunosorbent assay (ELISA) was developed for the detection of zearalenone (ZEN) using ZEN labeled catalase (CAT) as a competing antigen with H2O2-sensitive CdTe quantum dots (QDs) for signal transduction. The novel fluorescent ELISA showed very high sensitivity for ZEN detection because it combined the high catalytic activity of CAT to H2O2 and H2O2-sensitive property of QDs. Under optimal conditions, the developed method showed a good dynamic linear detection for ZEN in the range of 2.4pg/mL to 1.25ng/mL with a detection limit of 4.1pg/mL. The median inhibition concentration (IC50) of ZEN was 75pg/mL, which was approximately 17-fold lower than that of horseradish peroxidase-based conventional ELISA. Moreover, our developed method also showed a high reproducibility and an excellent selectivity. In brief, the novel fluorescent ELISA shows great potential for the sensitive and economic detection of mycotoxins and other analytes in food analysis, clinical diagnosis and environmental monitoring.
Collapse
Affiliation(s)
- Shengnan Zhan
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, PR China; Jiangxi-OAI Joint Research Institute, Nanchang University, Nanchang 330047, PR China
| | - Xiaolin Huang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, PR China; Jiangxi-OAI Joint Research Institute, Nanchang University, Nanchang 330047, PR China
| | - Rui Chen
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, PR China; College of Life Science, Nanchang University, Nanchang 330031, PR China
| | - Juan Li
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, PR China; Jiangxi-OAI Joint Research Institute, Nanchang University, Nanchang 330047, PR China
| | - Yonghua Xiong
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, PR China; Jiangxi-OAI Joint Research Institute, Nanchang University, Nanchang 330047, PR China.
| |
Collapse
|
27
|
Jayawardane D, Pan F, Lu JR, Zhao X. Co-adsorption of peptide amphiphile V(6)K and conventional surfactants SDS and C(12)TAB at the solid/water interface. SOFT MATTER 2015; 11:7986-7994. [PMID: 26329315 DOI: 10.1039/c5sm01670c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Recent research has reported many attractive benefits from short peptide amphiphiles. A practical route for them to enter the real world of applications is through formulation with conventional surfactants. This study reports the co-adsorption of the surfactant-like peptide, V6K, with conventional anionic and cationic surfactants at the solid/water interface. The time-dependant adsorption behaviour was examined using spectroscopic ellipsometry whilst adsorbed layer composition and structural distribution of the components were investigated by neutron reflection with the use of hydrogen/deuterium labelling of the surfactant molecules. Both binary (surfactant/peptide mixtures) and sequential (peptide followed by surfactant) adsorption have been studied. It was found that at the hydrophilic SiO2/water interface, the peptide was able to form a stable, flat, defected bilayer structure however both the structure and adsorbed amount were highly dependent on the initial peptide concentration. This consequently affected surfactant adsorption. In the presence of a pre-adsorbed peptide layer anionic sodium dodecyl sulfate (SDS) could readily co-adsorb at the interface; however, cationic dodecyl trimethyl ammonium bromide (C12TAB) could not co-adsorb due to the same charge character. However on a trimethoxy octyl silane (C8) coated hydrophobic surface, V6K formed a monolayer, and subsequent exposure to cationic and anionic surfactants both led to some co-adsorption at the interface. In binary surfactant/peptide mixtures, it was found that adsorption was dependent on the molar ratio of the surfactant and peptide. For SDS mixtures below molar unity and concentrations below CMC for C12TAB, V6K was able to dominate adsorption at the interface. Above molar unity, no adsorption was detected for SDS/V6K mixtures. In contrast, C12TAB gradually replaced the peptide and became dominant at the interface. These results thus elucidate the adsorption behaviour of V6K, which was found to dominate interfacial adsorption but its exact adsorbed amount and distribution were affected by interfacial hydrophobicity and interactions with conventional surfactants.
Collapse
Affiliation(s)
- Dharana Jayawardane
- Department of Chemical and Biological Engineering, University of Sheffield, Sheffield, S1 3JD, UK.
| | | | | | | |
Collapse
|
28
|
Perevozchikova T, Nanda H, Nesta DP, Roberts CJ. Protein Adsorption, Desorption, and Aggregation Mediated by Solid-Liquid Interfaces. J Pharm Sci 2015; 104:1946-1959. [DOI: 10.1002/jps.24429] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2014] [Revised: 02/19/2015] [Accepted: 02/26/2015] [Indexed: 01/13/2023]
|
29
|
Bhadra P, Shajahan MS, Bhattacharya E, Chadha A. Studies on varying n-alkanethiol chain lengths on a gold coated surface and their effect on antibody–antigen binding efficiency. RSC Adv 2015. [DOI: 10.1039/c5ra11725a] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Antibody immobilization efficiency varied with the SAM of n-alkanethiols. However, this did not necessarily result in a corresponding increase in antigen binding.
Collapse
Affiliation(s)
- P. Bhadra
- Centre for NEMS and Nanophotonics
- Indian Institute of Technology Madras
- Chennai 600 036
- India
| | - M. S. Shajahan
- Centre for NEMS and Nanophotonics
- Indian Institute of Technology Madras
- Chennai 600 036
- India
| | - E. Bhattacharya
- Centre for NEMS and Nanophotonics
- Indian Institute of Technology Madras
- Chennai 600 036
- India
- Department of Electrical Engineering
| | - A. Chadha
- Centre for NEMS and Nanophotonics
- Indian Institute of Technology Madras
- Chennai 600 036
- India
- Department of Biotechnology
| |
Collapse
|
30
|
Madaboosi N, Soares RRG, Chu V, Conde JP. A microfluidic immunoassay platform for the detection of free prostate specific antigen: a systematic and quantitative approach. Analyst 2015; 140:4423-33. [DOI: 10.1039/c5an00364d] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A novel physisorption- and bio-affinity amplification-based microfluidic immunoassay platform for free PSA detection within a clinically relevant range is reported.
Collapse
Affiliation(s)
- Narayanan Madaboosi
- INESC Microsistemas e Nanotecnologias (INESC MN) and IN – Institute of Nanoscience and Nanotechnology
- Lisbon
- Portugal
| | - Ruben R. G. Soares
- INESC Microsistemas e Nanotecnologias (INESC MN) and IN – Institute of Nanoscience and Nanotechnology
- Lisbon
- Portugal
- iBB – Institute for Bioengineering and Biosciences
- Instituto Superior Técnico
| | - Virginia Chu
- INESC Microsistemas e Nanotecnologias (INESC MN) and IN – Institute of Nanoscience and Nanotechnology
- Lisbon
- Portugal
| | - João Pedro Conde
- INESC Microsistemas e Nanotecnologias (INESC MN) and IN – Institute of Nanoscience and Nanotechnology
- Lisbon
- Portugal
- Department of Bioengineering
- Instituto Superior Técnico
| |
Collapse
|
31
|
Abstract
Abstract
This work compiles information on the principles of diagnostic immunochemical methods and the recent advances in this field. It presents an overview of modern techniques for the production of diagnostic antibodies, their modification with the aim of improving their diagnostic potency, the different types of immunochemical detection systems, and the increasing diagnostic applications for human health that include specific disease markers, individualized diagnosis of cancer subtypes, therapeutic and addictive drugs, food residues, and environmental contaminants. A special focus lies in novel developments of immunosensor techniques, promising approaches to miniaturized detection units and the associated microfluidic systems. The trends towards high-throughput systems, multiplexed analysis, and miniaturization of the diagnostic tools are discussed. It is also made evident that progress in the last few years has largely relied on novel chemical approaches.
Collapse
|
32
|
Lee KT, Muller DA, Coffey JW, Robinson KJ, McCarthy JS, Kendall MAF, Corrie SR. Capture of the Circulating Plasmodium falciparum Biomarker HRP2 in a Multiplexed Format, via a Wearable Skin Patch. Anal Chem 2014; 86:10474-83. [DOI: 10.1021/ac5031682] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Khai Tuck Lee
- The University of Queensland, Australian Institute
for Bioengineering and Nanotechnology, Delivery of Drugs and Genes
Group (D2G2), St. Lucia, Queensland 4072, Australia
- ARC
Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - David A. Muller
- The University of Queensland, Australian Institute
for Bioengineering and Nanotechnology, Delivery of Drugs and Genes
Group (D2G2), St. Lucia, Queensland 4072, Australia
- Australian Infectious Diseases Research Centre, St. Lucia, Queensland 4067, Australia
- ARC
Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Jacob W. Coffey
- The University of Queensland, Australian Institute
for Bioengineering and Nanotechnology, Delivery of Drugs and Genes
Group (D2G2), St. Lucia, Queensland 4072, Australia
- ARC
Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Kye J. Robinson
- The University of Queensland, Australian Institute
for Bioengineering and Nanotechnology, Delivery of Drugs and Genes
Group (D2G2), St. Lucia, Queensland 4072, Australia
- ARC
Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - James S. McCarthy
- Australian Infectious Diseases Research Centre, St. Lucia, Queensland 4067, Australia
- QIMR Berghofer Medical Research Institute, Herston, Queensland 4006, Australia
| | - Mark A. F. Kendall
- The University of Queensland, Australian Institute
for Bioengineering and Nanotechnology, Delivery of Drugs and Genes
Group (D2G2), St. Lucia, Queensland 4072, Australia
- Australian Infectious Diseases Research Centre, St. Lucia, Queensland 4067, Australia
- The University of Queensland, Faculty of Health
Sciences, St. Lucia, Queensland 4072, Australia
- ARC
Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Simon R. Corrie
- The University of Queensland, Australian Institute
for Bioengineering and Nanotechnology, Delivery of Drugs and Genes
Group (D2G2), St. Lucia, Queensland 4072, Australia
- Australian Infectious Diseases Research Centre, St. Lucia, Queensland 4067, Australia
- ARC
Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, St Lucia, Queensland 4072, Australia
| |
Collapse
|
33
|
Zapp E, da Silva PS, Westphal E, Gallardo H, Spinelli A, Vieira IC. Troponin T Immunosensor Based on Liquid Crystal and Silsesquioxane-Supported Gold Nanoparticles. Bioconjug Chem 2014; 25:1638-43. [DOI: 10.1021/bc500341a] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Eduardo Zapp
- Laboratory of Biosensors, ‡Study Group of Electrochemical and
Electroanalytical
Processes, and §Laboratory of Synthesis of Liquid Crystals, Department
of Chemistry, Federal University of Santa Catarina, 88040-900, Florianópolis, SC, Brazil
| | - Paulo Sérgio da Silva
- Laboratory of Biosensors, ‡Study Group of Electrochemical and
Electroanalytical
Processes, and §Laboratory of Synthesis of Liquid Crystals, Department
of Chemistry, Federal University of Santa Catarina, 88040-900, Florianópolis, SC, Brazil
| | - Eduard Westphal
- Laboratory of Biosensors, ‡Study Group of Electrochemical and
Electroanalytical
Processes, and §Laboratory of Synthesis of Liquid Crystals, Department
of Chemistry, Federal University of Santa Catarina, 88040-900, Florianópolis, SC, Brazil
| | - Hugo Gallardo
- Laboratory of Biosensors, ‡Study Group of Electrochemical and
Electroanalytical
Processes, and §Laboratory of Synthesis of Liquid Crystals, Department
of Chemistry, Federal University of Santa Catarina, 88040-900, Florianópolis, SC, Brazil
| | - Almir Spinelli
- Laboratory of Biosensors, ‡Study Group of Electrochemical and
Electroanalytical
Processes, and §Laboratory of Synthesis of Liquid Crystals, Department
of Chemistry, Federal University of Santa Catarina, 88040-900, Florianópolis, SC, Brazil
| | - Iolanda Cruz Vieira
- Laboratory of Biosensors, ‡Study Group of Electrochemical and
Electroanalytical
Processes, and §Laboratory of Synthesis of Liquid Crystals, Department
of Chemistry, Federal University of Santa Catarina, 88040-900, Florianópolis, SC, Brazil
| |
Collapse
|
34
|
Huang X, Aguilar ZP, Li H, Lai W, Wei H, Xu H, Xiong Y. Fluorescent Ru(phen)3(2+)-doped silica nanoparticles-based ICTS sensor for quantitative detection of enrofloxacin residues in chicken meat. Anal Chem 2013; 85:5120-8. [PMID: 23614687 DOI: 10.1021/ac400502v] [Citation(s) in RCA: 93] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
A Ru(phen)3(2+)-doped silica fluorescent nanoparticle (FN)-based immunochromatographic test strip (ICTS) sensor was developed for rapid, high sensitivity, easy to use, and low cost quantitative detection of enrofloxacin (ENR) residues in chicken meat. The fluorescence signal intensity of the FNs at the test line (FI(T)) and control line (FI(C)) was determined with a prototype of a portable fluorescent strip reader. Unique properties of Ru(phen)3(2+) doped silica nanoparticles (e.g., large Stokes shift, high emission quantum yield, and long fluorescence lifetime) were combined with the advantages of ICTS and an easy to make portable fluorescent strip reader. The signal was based on FI(T)/FI(C) ratio to effectively eliminate strip to strip variation and matrix effects. Various parameters that influenced the strip were investigated and optimized. Quantitative ENR detection with the FNs ICTS sensor using 80 μL sample took only 20 min, which is faster than the commercial ELISA kit (that took 90 min). The linear range of detection in chicken extract was established at 0.025-3.500 ng/mL with a half maximal inhibitory concentration at 0.22 ± 0.02 ng/mL. Using the optimized parameters, the limit of detection (LOD) for ENR using the FNs ICTS sensor was recorded at 0.02 ng/mL in chicken extract. This corresponds to 0.12 μg/kg chicken meat which is two (2) orders of magnitude better that the maximum residue limits (MRLs) imposed in Japan (10 μg/kg) and three (3) orders of magnitude better than those imposed in China. The intra- and inter-assay coefficient of variations (CVs) were 6.04% and 12.96% at 0.5 ng/mL, 6.92% and 12.61% at 1.0 ng/mL, and 6.66% and 11.88% at 2.0 ng/mL in chicken extract, respectively. The recoveries using the new FNs ICTS sensor from fifty (50) ENR-spiked chicken samples showed a highly significant correlation (R(2) = 0.9693) with the commercial enzyme-linked immunosorbent assay (ELISA) kit. The new FNs ICTS sensor is a simple, rapid, sensitive, accurate, and inexpensive quantitative detection of ENR residues in chicken meat and extracts.
Collapse
Affiliation(s)
- Xiaolin Huang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, P R China
| | | | | | | | | | | | | |
Collapse
|
35
|
Hortigüela MJ, Wall JG. Improved detection of domoic acid using covalently immobilised antibody fragments. Mar Drugs 2013; 11:881-95. [PMID: 23493076 PMCID: PMC3705377 DOI: 10.3390/md11030881] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2012] [Revised: 01/13/2013] [Accepted: 02/21/2013] [Indexed: 12/16/2022] Open
Abstract
Antibody molecules, and antibody fragments in particular, have enormous potential in the development of biosensors for marine monitoring. Conventional immobilisation approaches used in immunoassays typically yield unstable and mostly incorrectly oriented antibodies, however, resulting in reduced detection sensitivities for already low concentration analytes. The 2H12 anti-domoic acid scFv antibody fragment was engineered with cysteine-containing linkers of two different lengths, distal to the antigen binding pocket, for covalent and correctly oriented immobilisation of the scFvs on functionalised solid supports. The Escherichia coli-produced, cysteine-engineered scFvs dimerised in solution and demonstrated similar efficiencies of covalent immobilisation on maleimide-activated plates and minimal non-covalent attachment. The covalently attached scFvs exhibited negligible leaching from the support under acidic conditions that removed almost 50% of the adsorbed wildtype fragment, and IC50s for domoic acid of 270 and 297 ng/mL compared with 1126 and 1482 ng/mL, respectively, for their non-covalently adsorbed counterparts. The expression and immobilisation approach will facilitate the development of stable, reusable biosensors with increased stability and detection sensitivity for marine neurotoxins.
Collapse
Affiliation(s)
| | - J. Gerard Wall
- Microbiology, NUI Galway, University Road, Galway, Ireland; E-Mail:
- Network of Excellence for Functional Biomaterials (NFB), NUI Galway, University Road, Galway, Ireland
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +353-91-495-808
| |
Collapse
|
36
|
Trilling AK, Beekwilder J, Zuilhof H. Antibody orientation on biosensor surfaces: a minireview. Analyst 2013; 138:1619-27. [DOI: 10.1039/c2an36787d] [Citation(s) in RCA: 301] [Impact Index Per Article: 27.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|