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Mohajeri S, Moayedi S, Azimi L, Akrami M, Rad-Malekshahi M, Fazeli MR, Fallah F, Haririan I. Nanobiosensor Based on Sugar Code-AuNPs Aggregation: A Key to Opening New Gates in Rapid Diagnosis of Streptococcal Pharyngitis. Front Bioeng Biotechnol 2022; 10:957271. [PMID: 35935503 PMCID: PMC9354983 DOI: 10.3389/fbioe.2022.957271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Accepted: 06/21/2022] [Indexed: 11/13/2022] Open
Abstract
Streptococcal pharyngitis is mainly caused by Streptococcus pyogenes (GAS), which if left untreated can lead to rheumatic heart disease. The accurate diagnosis of streptococcal pharyngitis is a challenge for clinicians because several symptoms of streptococcal pharyngitis are similar to viral pharyngitis. There are some commercially available biosensors for the rapid diagnosis of streptococcal pharyngitis. Nevertheless, they are not widely used by physicians, mainly because of their high price and dependence on the instrument. Serotype M1 GAS is the most prevalent cause of streptococcal pharyngitis and binds to H-1 antigen, a sugar code found on oral epithelial cells. Here, we present a nanobiosensor based on aggregation of H-1 antigen-conjugated gold nanoparticles for the rapid, qualitative, and quantitative detection of M1 GAS, which is inspired by the sugar code-lectin interaction. It is noteworthy that M1 GAS was detected in a wide concentration range (1 × 103–1×106 CFU/ml) with a linear response and a short detection time of 20 min. Good reproducibility, easy-to-use, and relatively low production cost are among other attractive features of this nanobiosensor. This work provides a strategic roadmap for developing a new generation of biosensors via targeting the sugar code-lectin interaction in future studies.
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Affiliation(s)
- Sahar Mohajeri
- Department of Pharmaceutical Biomaterials, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Saeed Moayedi
- Department of Pharmaceutical Biomaterials, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Leila Azimi
- Pediatric Infections Research Center, Research Institute for Children’s Health, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Akrami
- Department of Pharmaceutical Biomaterials, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Mazda Rad-Malekshahi
- Department of Pharmaceutical Biomaterials, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Reza Fazeli
- Department of Drug and Food Control, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Fatemeh Fallah
- Pediatric Infections Research Center, Research Institute for Children’s Health, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Ismaeil Haririan
- Department of Pharmaceutical Biomaterials, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
- *Correspondence: Ismaeil Haririan,
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Renner AM, Derichsweiler C, Ilyas S, Gessner I, Fries JWU, Mathur S. High efficiency capture of biomarker miRNA15a for noninvasive diagnosis of malignant kidney tumors. Biomater Sci 2022; 10:1113-1122. [PMID: 35048092 DOI: 10.1039/d1bm01737c] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
To date, there are no preoperative and quantitative dynamics in clinical practice that can reliably differentiate between a benign and malignant renal cell carcinoma (RCC). For monitoring different analytes in body fluids, more than 40 different molecular biomarkers have been identified, however, they are associated with limited clinical sensitivity and/or non-optimal specificity due to their leaky nature. Previous work on RCC demonstrated the miRNA15a to be reliable and novel biomarker with 98.1% specificity and 100% sensitivity. Despite the high potential of miRNA15a biomarker, its clinical application is considerably hampered by the insensitive nature of the detection methods and low concentration of biomarker in samples that is aggravated by the high level of contamination due to other solutes present in body fluids. In this work, a non-invasive quantitative approach is demonstrated to overcome such diagnostics issues through biotin-streptavidin binding and fluorescence active magnetic nanocarriers that ensured prompt isolation, enrichment and purification of the biomarker miRNA15a from urine. The study demonstrates that detectable low levels of these miRNAs through miRNA capturing nanocarriers can potentially function as advanced diagnostic markers for the non-invasive investigation and early detection of renal cancer.
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Affiliation(s)
- Alexander M Renner
- Institute of Inorganic Chemistry, University of Cologne, Greinstr. 6, 50939 Cologne, Germany.
| | - Christina Derichsweiler
- Institute of Inorganic Chemistry, University of Cologne, Greinstr. 6, 50939 Cologne, Germany.
| | - Shaista Ilyas
- Institute of Inorganic Chemistry, University of Cologne, Greinstr. 6, 50939 Cologne, Germany.
| | - Isabel Gessner
- Institute of Inorganic Chemistry, University of Cologne, Greinstr. 6, 50939 Cologne, Germany.
| | - Jochen W U Fries
- Institute of Urology/Pathology, University Hospital of Cologne, Kerpenerstr. 62, 50924 Cologne, Germany
| | - Sanjay Mathur
- Institute of Inorganic Chemistry, University of Cologne, Greinstr. 6, 50939 Cologne, Germany.
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3
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Moayedi S, Yadegar A, Balalaie S, Yarmohammadi M, Zali MR, Suzuki H, Fricker G, Haririan I. Sugar Codes Conjugated Alginate: An Innovative Platform to Make a Strategic Breakthrough in Simultaneous Prophylaxis of GERD and Helicobacter pylori Infection. Drug Des Devel Ther 2020; 14:2405-2412. [PMID: 32606607 PMCID: PMC7306573 DOI: 10.2147/dddt.s255611] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Accepted: 06/10/2020] [Indexed: 11/23/2022] Open
Abstract
INTRODUCTION Currently, gastroesophageal reflux disease (GERD) is one of the most ubiquitous problems in clinical practice. An antacid-alginate combination (under the trade name Gaviscon) is a natural-based product that effectively suppresses GERD. This product acts via the formation of viscous gel that floats on the top of the gastric content. On the other hand, efficient management of Helicobacter pylori infection with minimal side effects is an important goal for gastroenterologists. Furthermore, some H. pylori-positive patients suffer from GERD. METHODS Here, we present the results of investigations on alginate conjugated to sugar codes in order to find initial clues regarding the potential ability of this conjugate in the simultaneous prophylaxis of GERD and H. pylori infection in an in vitro assay. RESULTS It is noteworthy that our results reveal that sugar codes conjugated alginate considerably decrease (approximately 74%) the adhesion of H. pylori to gastric epithelial cells in vitro. Moreover, surprisingly after conjugation of sugar codes, alginate can maintain its ability to create gel. Our results demonstrate that alginate conjugated to sugar codes is not cytotoxic. CONCLUSION The preparation of these conjugates can be regarded as the first step to establish a new roadmap for the simultaneous prevention of GERD and H. pylori infection in future studies on in vivo models.
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Affiliation(s)
- Saeed Moayedi
- Department of Pharmaceutical Biomaterials, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Abbas Yadegar
- Foodborne and Waterborne Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Saeed Balalaie
- Peptide Chemistry Research Center, K. N. Toosi University of Technology, Tehran, Iran
| | - Mahdiyeh Yarmohammadi
- Foodborne and Waterborne Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Reza Zali
- Gastroenterology and Liver Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hidekazu Suzuki
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Tokai University School of Medicine, Isehara, Kanagawa259-1193, Japan
| | - Gert Fricker
- Institute of Pharmacy and Molecular Biotechnology, Ruprecht-Karls-University, Heidelberg, Germany
| | - Ismaeil Haririan
- Department of Pharmaceutical Biomaterials, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
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4
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Xie Y, Ning M, Ban J, Li Q. Novel Enzyme-Linked Aptamer Assay for the Determination of Aflatoxin B1 in Peanuts. ANAL LETT 2019. [DOI: 10.1080/00032719.2019.1632337] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Yanli Xie
- School of Food Science and Technology, Henan University of Technology, Zhengzhou, China
- Henan Key Laboratory of Cereal and Oil Food Safety Inspection and Control, Zhengzhou, China
| | - Mengge Ning
- School of Food Science and Technology, Henan University of Technology, Zhengzhou, China
- Henan Key Laboratory of Cereal and Oil Food Safety Inspection and Control, Zhengzhou, China
| | - Jun Ban
- School of Food Science and Technology, Henan University of Technology, Zhengzhou, China
- Henan Key Laboratory of Cereal and Oil Food Safety Inspection and Control, Zhengzhou, China
| | - Qian Li
- School of Food Science and Technology, Henan University of Technology, Zhengzhou, China
- Henan Key Laboratory of Cereal and Oil Food Safety Inspection and Control, Zhengzhou, China
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Delgadillo RF, Mueser TC, Zaleta-Rivera K, Carnes KA, González-Valdez J, Parkhurst LJ. Detailed characterization of the solution kinetics and thermodynamics of biotin, biocytin and HABA binding to avidin and streptavidin. PLoS One 2019; 14:e0204194. [PMID: 30818336 PMCID: PMC6394990 DOI: 10.1371/journal.pone.0204194] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2018] [Accepted: 02/01/2019] [Indexed: 01/02/2023] Open
Abstract
The high affinity (KD ~ 10−15 M) of biotin for avidin and streptavidin is the essential component in a multitude of bioassays with many experiments using biotin modifications to invoke coupling. Equilibration times suggested for these assays assume that the association rate constant (kon) is approximately diffusion limited (109 M-1s-1) but recent single molecule and surface binding studies indicate that they are slower than expected (105 to 107 M-1s-1). In this study, we asked whether these reactions in solution are diffusion controlled, which reaction model and thermodynamic cycle describes the complex formation, and if there are any functional differences between avidin and streptavidin. We have studied the biotin association by two stopped-flow methodologies using labeled and unlabeled probes: I) fluorescent probes attached to biotin and biocytin; and II) unlabeled biotin and HABA, 2-(4’-hydroxyazobenzene)-benzoic acid. Both native avidin and streptavidin are homo-tetrameric and the association data show no cooperativity between the binding sites. The kon values of streptavidin are faster than avidin but slower than expected for a diffusion limited reaction in both complexes. Moreover, the Arrhenius plots of the kon values revealed strong temperature dependence with large activation energies (6–15 kcal/mol) that do not correspond to a diffusion limited process (3–4 kcal/mol). Accordingly, we propose a simple reaction model with a single transition state for non-immobilized reactants whose forward thermodynamic parameters complete the thermodynamic cycle, in agreement with previously reported studies. Our new understanding and description of the kinetics, thermodynamics, and spectroscopic parameters for these complexes will help to improve purification efficiencies, molecule detection, and drug screening assays or find new applications.
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Affiliation(s)
- Roberto F. Delgadillo
- Department of Chemistry, University of Nebraska—Lincoln, Lincoln, Nebraska, United States of America
- * E-mail: (RFD); (LJP)
| | - Timothy C. Mueser
- Department of Chemistry and Biochemistry, University of Toledo, Toledo, Ohio, United States of America
| | - Kathia Zaleta-Rivera
- Department of Bioengineering, University of California San Diego, San Diego, California, United States of America
| | - Katie A. Carnes
- GlaxoSmithKline, Medicinal Science and Technology, R&D, King of Prussia, Pennsylvania, United States of America
| | - José González-Valdez
- Tecnologico de Monterrey, School of Engineering and Science, NL, Monterrey, Mexico
| | - Lawrence J. Parkhurst
- Department of Chemistry, University of Nebraska—Lincoln, Lincoln, Nebraska, United States of America
- * E-mail: (RFD); (LJP)
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Miyagawa A, Inoue Y, Harada M, Okada T. Acoustic Sensing Based on Density Shift of Microspheres by Surface Binding of Gold Nanoparticles. ANAL SCI 2018; 33:939-944. [PMID: 28794331 DOI: 10.2116/analsci.33.939] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Herein, we propose a concept for sensing based on density changes of microparticles (MPs) caused by a biochemical reaction. The MPs are levitated by a combined acoustic-gravitational force at a position determined by the density and compressibility. Importantly, the levitation is independent of the MPs sizes. When gold nanoparticles (AuNPs) are bound on the surface of polymer MPs through a reaction, the density of the MPs dramatically increases, and their levitation position in the acoustic-gravitational field is lowered. Because the shift of the levitation position is proportional to the number of AuNPs bound on one MP, we can determine the number of molecules involved in the reaction. The avidin-biotin reaction is used to demonstrate the effectiveness of this concept. The number of molecules involved in the reaction is very small because the reaction space is small for an MP; thus, the method has potential for highly sensitive detection.
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Affiliation(s)
| | - Yoshinori Inoue
- Department of Chemistry, Tokyo Institute of Technology.,Department of Applied Chemistry, Aichi Institute of Technology
| | - Makoto Harada
- Department of Chemistry, Tokyo Institute of Technology
| | - Tetsuo Okada
- Department of Chemistry, Tokyo Institute of Technology
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7
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Sharma J, Uchida M, Miettinen HM, Douglas T. Modular interior loading and exterior decoration of a virus-like particle. NANOSCALE 2017; 9:10420-10430. [PMID: 28702648 PMCID: PMC6482854 DOI: 10.1039/c7nr03018e] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Virus-like particles (VLPs) derived from the bacteriophage P22 offer an interesting and malleable platform for encapsulation and multivalent presentation of cargo molecules. The packaging of cargo in P22 VLP is typically achieved through genetically enabled directed in vivo encapsulation. However, this approach does not allow control over the packing density and composition of the encapsulated cargos. Here, we have adopted an in vitro assembly approach to gain control over cargo packaging in P22. The packaging was controlled by closely regulating the stoichiometric ratio of cargo-fused-scaffold protein and wild-type scaffold protein during the in vitro assembly. In a "one-pot assembly reaction" coat protein subunits were incubated with varied ratios of wild-type scaffold protein and cargo-fused-scaffold protein, which resulted in the encapsulation of both components in a co-assembled capsid. These experiments demonstrate that an input stoichiometry can be used to achieve controlled packaging of multiple cargos within the VLP. The porous nature of P22 allows the escape and re-entry of wild-type scaffold protein from the assembled capsid but scaffold protein fused to a protein-cargo cannot traverse the capsid shell due to the size of the cargo. This has allowed us to control and alter the packing density by selectively releasing wild-type scaffold protein from the co-assembled capsids. We have demonstrated these concepts in the P22 system using an encapsulated streptavidin protein and have shown its highly selective interaction with biotin or biotin derivatives. Additionally, this system can be used to encapsulate small molecules coupled to biotin, or display large proteins, that cannot enter the capsid and thus remain available for the multivalent display on the exterior of the capsid when attached to a flexible biotinylated linker. Thus, we have developed a P22 system with controlled protein cargo composition and packing density, to which both small and large molecules can be attached at high copy number on the interior or exterior of the capsid.
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Affiliation(s)
- Jhanvi Sharma
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, USA.
| | - Masaki Uchida
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, USA.
| | - Heini M Miettinen
- Department of Microbiology & Immunology, Montana State University, PO Box 173520, Bozeman, Montana 59717, USA
| | - Trevor Douglas
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, USA.
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8
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van der Meer SB, Knuschke T, Frede A, Schulze N, Westendorf AM, Epple M. Avidin-conjugated calcium phosphate nanoparticles as a modular targeting system for the attachment of biotinylated molecules in vitro and in vivo. Acta Biomater 2017; 57:414-425. [PMID: 28552820 DOI: 10.1016/j.actbio.2017.05.049] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 05/22/2017] [Accepted: 05/24/2017] [Indexed: 01/25/2023]
Abstract
Avidin was covalently conjugated to the surface of calcium phosphate nanoparticles, coated with a thin silica shell and terminated by sulfhydryl groups (diameter of the solid core about 50nm), with a bifunctional crosslinker connecting the amino groups of avidin to the sulfhydryl group on the nanoparticle surface. This led to a versatile nanoparticle system where all kinds of biotinylated (bio-)molecules can be easily attached to the surface by the non-covalent avidin-biotin-complex formation. It also permits the attachment of different biomolecules on the same nanoparticle (heteroavidity), creating a modular system for specific applications in medicine and biology. The variability of the binding to the nanoparticle surface of the was demonstrated with various biotinylated molecules, i.e. fluorescent dyes and antibodies. The accessibility of the conjugated avidin was demonstrated by a fluorescence-quenching assay. About 2.6 binding sites for biotin were accessible on each avidin tetramer. Together with a number of about 240 avidin tetramer units per nanoparticle, this offers about 600 binding sites for biotin on each nanoparticle. The uptake of fluorescently labelled avidin-conjugated calcium phosphate nanoparticles by HeLa cells showed the co-localization of fluorescent avidin and fluorescent biotin, indicating the stability of the complex under cell culture conditions. CD11c-antibody functionalized nanoparticles specifically targeted antigen-presenting immune cells (dendritic cells; DCs) in vitro and in vivo (mice) with high efficiency. STATEMENT OF SIGNIFICANCE Calcium phosphate nanoparticles have turned out to be very useful transporters for biomolecules into cells, both in vitro and in vivo. However, their covalent surface functionalization with antibodies, fluorescent dyes, or proteins requires a separate chemical synthesis for each kind of surface molecule. We have therefore developed avidin-terminated calcium phosphate nanoparticles to which all kinds of biotinylated molecules can be easily attached, also as a mixture of two or more molecules. This non-covalent bond is stable both in cell culture and after injection into mice in vivo. Thus, we have created a highly versatile system for many applications, from the delivery of biomolecules over the targeting of cells and tissue to in vivo imaging.
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Affiliation(s)
- Selina Beatrice van der Meer
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, 45117 Essen, Germany
| | - Torben Knuschke
- Medical Microbiology, University Hospital Essen, University of Duisburg-Essen, Hufelandstr. 55, 45147 Essen, Germany
| | - Annika Frede
- Medical Microbiology, University Hospital Essen, University of Duisburg-Essen, Hufelandstr. 55, 45147 Essen, Germany
| | - Nina Schulze
- Imaging Centre Campus Essen (ICCE), University of Duisburg-Essen, Universitaetsstr. 5-7, 45117 Essen, Germany
| | - Astrid M Westendorf
- Medical Microbiology, University Hospital Essen, University of Duisburg-Essen, Hufelandstr. 55, 45147 Essen, Germany
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, 45117 Essen, Germany.
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9
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Arcila-Lozano LS, Ríos-Corripio MA, García-Pérez BE, Jaramillo-Flores ME, González CA, Rocha-Gracia RC, Gracia-Jiménez JM, Rojas-López M. Fluorescent Bioconjugate Based on Gold Nanoparticles for the Determination of Staphylococcus aureus. ANAL LETT 2016. [DOI: 10.1080/00032719.2016.1212204] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
| | | | - B. E. García-Pérez
- Instituto Politécnico Nacional, ENCB-Depto. de Inmunología, Ciudad de México, México
| | - M. E. Jaramillo-Flores
- Instituto Politécnico Nacional, ENCB-Depto. de Ingeniería Bioquímica, Ciudad de México, México
| | - C. A. González
- Instituto Politécnico Nacional, ESM, Ciudad de México, México
| | - R. C. Rocha-Gracia
- Benemérita Universidad Autónoma de Puebla, Instituto de Ciencias, Centro de Investigaciones en Ciencias Microbiológicas, Puebla, Puebla, México
| | - J. M. Gracia-Jiménez
- Benemérita Universidad Autónoma de Puebla, Instituto de Física, Puebla, Puebla, México
| | - M. Rojas-López
- Instituto Politécnico Nacional, CIBA-Tlaxcala, Tepetitla, Tlaxcala, México
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10
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Library design and screening protocol for artificial metalloenzymes based on the biotin-streptavidin technology. Nat Protoc 2016; 11:835-52. [DOI: 10.1038/nprot.2016.019] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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11
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Quantification of the degree of biotinylation of proteins using proteinase K digestion and competition ELISA. J Immunol Methods 2016; 430:61-3. [DOI: 10.1016/j.jim.2016.01.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2015] [Revised: 01/08/2016] [Accepted: 01/15/2016] [Indexed: 11/21/2022]
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12
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Quantifying the stabilizing effects of protein-ligand interactions in the gas phase. Nat Commun 2015; 6:8551. [PMID: 26440106 PMCID: PMC4600733 DOI: 10.1038/ncomms9551] [Citation(s) in RCA: 123] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Accepted: 09/02/2015] [Indexed: 01/14/2023] Open
Abstract
The effects of protein–ligand interactions on protein stability are typically monitored by a number of established solution-phase assays. Few translate readily to membrane proteins. We have developed an ion-mobility mass spectrometry approach, which discerns ligand binding to both soluble and membrane proteins directly via both changes in mass and ion mobility, and assesses the effects of these interactions on protein stability through measuring resistance to unfolding. Protein unfolding is induced through collisional activation, which causes changes in protein structure and consequently gas-phase mobility. This enables detailed characterization of the ligand-binding effects on the protein with unprecedented sensitivity. Here we describe the method and software required to extract from ion mobility data the parameters that enable a quantitative analysis of individual binding events. This methodology holds great promise for investigating biologically significant interactions between membrane proteins and both drugs and lipids that are recalcitrant to characterization by other means. Relatively few techniques can quantitatively measure the effect of ligands on membrane protein stability. Here the authors demonstrate the use of ion-mobility mass spectrometry to accurately measure and quantify ligand-induced protein stabilization in the gas phase.
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13
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Guo X, Wen F, Zheng N, Luo Q, Wang H, Wang H, Li S, Wang J. Development of an ultrasensitive aptasensor for the detection of aflatoxin B1. Biosens Bioelectron 2014; 56:340-4. [PMID: 24549114 DOI: 10.1016/j.bios.2014.01.045] [Citation(s) in RCA: 110] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2013] [Revised: 01/10/2014] [Accepted: 01/24/2014] [Indexed: 01/11/2023]
Abstract
Contamination of feed and food by aflatoxin B1 (AFB1), one of the most toxic of the mycotoxins, is a global concern. To prevent food safety scares, and avoid subsequent economic losses due to the recall of contaminated items, methods for the rapid, sensitive and specific detection of AFB1 at trace levels are much in demand. In this work, a simple, ultrasensitive, and reliable aptasensor is described for the detection of AFB1. An AFB1 aptamer was used as a molecular recognition probe, while its complementary DNA played a role as a signal generator for amplification by real-time quantitative polymerase chain reaction (PCR). Under optimal conditions, a wide linear detection range (5.0 × 10(-5) to 5.0 ng mL(-1)) was achieved, with a high sensitivity (limit of detection (LOD)=25 fg mL(-1)). In addition, the proposed aptasensor exhibited excellent specificity for AFB1 compared with eight other mycotoxins, with no obvious Ct value change. This aptasensor can also be used in quantifying AFB1 levels in Chinese wild rye hay samples and infant rice cereal samples, demonstrating satisfactory recoveries in the range of 88-127% and 94-119%, respectively. This detection technique has a significant potential for high-throughput, quantitative determination of mycotoxin levels in a large range of feeds and foods.
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Affiliation(s)
- Xiaodong Guo
- Ministry of Agriculture Laboratory of Quality & Safety Risk Assessment for Dairy Products (Beijing), Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China; College of Animal Science and Technology, Xinjiang Agricultural University, Urumchi 830000, PR China; Ministry of Agriculture-Milk and Dairy Product Inspection Center (Beijing), Beijing 100193, PR China
| | - Fang Wen
- Ministry of Agriculture Laboratory of Quality & Safety Risk Assessment for Dairy Products (Beijing), Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China; Ministry of Agriculture-Milk and Dairy Product Inspection Center (Beijing), Beijing 100193, PR China
| | - Nan Zheng
- Ministry of Agriculture Laboratory of Quality & Safety Risk Assessment for Dairy Products (Beijing), Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China; Ministry of Agriculture-Milk and Dairy Product Inspection Center (Beijing), Beijing 100193, PR China; State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China.
| | - Qiujiang Luo
- College of Animal Science and Technology, Xinjiang Agricultural University, Urumchi 830000, PR China
| | - Haiwei Wang
- Ministry of Agriculture Laboratory of Quality & Safety Risk Assessment for Dairy Products (Beijing), Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China; Ministry of Agriculture-Milk and Dairy Product Inspection Center (Beijing), Beijing 100193, PR China
| | - Hui Wang
- Ministry of Agriculture Laboratory of Quality & Safety Risk Assessment for Dairy Products (Beijing), Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China; Ministry of Agriculture-Milk and Dairy Product Inspection Center (Beijing), Beijing 100193, PR China
| | - Songli Li
- Ministry of Agriculture Laboratory of Quality & Safety Risk Assessment for Dairy Products (Beijing), Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China; Ministry of Agriculture-Milk and Dairy Product Inspection Center (Beijing), Beijing 100193, PR China
| | - Jiaqi Wang
- Ministry of Agriculture Laboratory of Quality & Safety Risk Assessment for Dairy Products (Beijing), Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China; Ministry of Agriculture-Milk and Dairy Product Inspection Center (Beijing), Beijing 100193, PR China; State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China
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Xu W, Liu S, Yu J, Cui M, Li J, Guo Y, Wang H, Huang J. An ultrasensitive HRP labeled competitive aptasensor for oxytetracycline detection based on grapheme oxide–polyaniline composites as the signal amplifiers. RSC Adv 2014. [DOI: 10.1039/c3ra47368f] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Magliulo M, Mallardi A, Mulla MY, Cotrone S, Pistillo BR, Favia P, Vikholm-Lundin I, Palazzo G, Torsi L. Electrolyte-gated organic field-effect transistor sensors based on supported biotinylated phospholipid bilayer. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2013; 25:2090-4. [PMID: 23288589 DOI: 10.1002/adma.201203587] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2012] [Revised: 11/05/2012] [Indexed: 05/09/2023]
Abstract
Anchored, biotinylated phospholipids forming the capturing layers in an electrolyte-gated organic field-effect transistor (EGOFET) allow label-free electronic specific detection at a concentration level of 10 nM in a high ionic strength solution. The sensing mechanism is based on a clear capacitive effect across the PL layers involving the charges of the target molecules.
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Affiliation(s)
- Maria Magliulo
- Dipartimento di Chimica, Università degli Studi di Bari Aldo Moro, Bari, Italy
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Lim KH, Huang H, Pralle A, Park S. Stable, high-affinity streptavidin monomer for protein labeling and monovalent biotin detection. Biotechnol Bioeng 2012; 110:57-67. [DOI: 10.1002/bit.24605] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2012] [Revised: 06/27/2012] [Accepted: 07/03/2012] [Indexed: 01/19/2023]
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Mittal R, Bruchez MP. Biotin-4-fluorescein based fluorescence quenching assay for determination of biotin binding capacity of streptavidin conjugated quantum dots. Bioconjug Chem 2011; 22:362-8. [PMID: 21314110 PMCID: PMC3059817 DOI: 10.1021/bc100321c] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The valency of quantum dot nanoparticles conjugated with biomolecules is closely related to their performance in cell tagging, tracking, and imaging experiments. Commercially available streptavidin conjugates (SAv QDs) are the most commonly used tool for preparing QD−biomolecule conjugates. The fluorescence quenching of biotin-4-fluorscein (B4F) provides a straightforward assay to quantify the number of biotin binding sites per SAv QD. The utility of this method was demonstrated by quantitatively characterizing the biotin binding capacity of commercially available amphiphilic poly(acrylic acid) Qdot ITK SAv conjugates and poly(ethylene glycol) modified Qdot PEG SAv conjugates with emission wavelengths of 525, 545, 565, 585, 605, 625, 655, 705, and 800 nm. Results showed that 5- to 30-fold more biotin binding sites are available on ITK SAv QDs compared to PEG SAv QDs of the same color with no systematic variation of biotin binding capacity with size.
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Affiliation(s)
- Rowena Mittal
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania, USA
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18
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Computational and mutagenesis studies of the streptavidin native dimer interface. J Mol Graph Model 2010; 29:295-308. [DOI: 10.1016/j.jmgm.2010.09.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2010] [Revised: 08/08/2010] [Accepted: 09/15/2010] [Indexed: 11/20/2022]
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