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Torregrosa D, Jauset-Rubio M, Serrano R, Svobodová M, Grindlay G, O'Sullivan CK, Mora J. Ultrasensitive determination of β-conglutin food allergen by means an aptamer assay based on inductively coupled plasma mass spectrometry detection. Anal Chim Acta 2023; 1252:341042. [PMID: 36935136 DOI: 10.1016/j.aca.2023.341042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 03/01/2023] [Accepted: 03/02/2023] [Indexed: 03/06/2023]
Abstract
The overall objective of this work is the evaluation of different competitive aptamer assays based on inductively coupled plasma mass spectrometry (ICP-MS) detection for the determination of β-conglutin (food protein allergen from lupin) in flour samples. To this end, two competitive aptamer assay schemes were developed using either thiolated aptamers chemisorbed onto gold nanoparticles (AuNPs) or biotinylated aptamers linked to streptavidin-AuNPs. The influence of ICP-MS detection mode (i.e., conventional vs single particle) on assay performance was explored. In the case of the thiolated aptamer, the limit of detection (LoD) obtained using the single particle mode was improved 2-fold as compared to the LoD provided by the conventional mode. With regards to the biotinylated aptamer, the use of the conventional mode provided a 5-fold improvement of LoD as compared to that obtained for the single particle one. Using the optimized conditions, the best LoD of 2 pM was obtained with the biotinylated aptamer operating with conventional ICP-MS detection. When compared to previous reports using the same aptamer in a competitive assay, the developed method significantly improved the LoD by at least an order of magnitude. Different flour samples containing lupin were successfully analyzed according to European Conformity guidelines for the analysis of food contaminants.
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Affiliation(s)
- Daniel Torregrosa
- University of Alicante, Department of Analytical Chemistry, Nutrition and Food Sciences, PO Box 99, 03080, Alicante, Spain
| | - Miriam Jauset-Rubio
- INTERFIBIO Consolidated Research Group, Department of Chemical Engineering, Universitat Rovira i Virgili, 43007, Tarragona, Spain
| | - Raquel Serrano
- University of Alicante, Department of Analytical Chemistry, Nutrition and Food Sciences, PO Box 99, 03080, Alicante, Spain
| | - Marketa Svobodová
- INTERFIBIO Consolidated Research Group, Department of Chemical Engineering, Universitat Rovira i Virgili, 43007, Tarragona, Spain
| | - Guillermo Grindlay
- University of Alicante, Department of Analytical Chemistry, Nutrition and Food Sciences, PO Box 99, 03080, Alicante, Spain.
| | - Ciara K O'Sullivan
- INTERFIBIO Consolidated Research Group, Department of Chemical Engineering, Universitat Rovira i Virgili, 43007, Tarragona, Spain; Institució Catalana de Recerca i Estudis Avancats (ICREA), 08010, Barcelona, Spain
| | - Juan Mora
- University of Alicante, Department of Analytical Chemistry, Nutrition and Food Sciences, PO Box 99, 03080, Alicante, Spain
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Banu K, Mondal B, Rai B, Monica N, Hanumegowda R. Prospects for the application of aptamer based assay platforms in pathogen detection. Biocybern Biomed Eng 2022. [DOI: 10.1016/j.bbe.2022.07.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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3
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Liu R, Zhang F, Sang Y, Katouzian I, Jafari SM, Wang X, Li W, Wang J, Mohammadi Z. Screening, identification, and application of nucleic acid aptamers applied in food safety biosensing. Trends Food Sci Technol 2022. [DOI: 10.1016/j.tifs.2022.03.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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4
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Villa C, Costa J, Mafra I. Lupine allergens: Clinical relevance, molecular characterization, cross-reactivity, and detection strategies. Compr Rev Food Sci Food Saf 2020; 19:3886-3915. [PMID: 33337069 DOI: 10.1111/1541-4337.12646] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 08/13/2020] [Accepted: 09/15/2020] [Indexed: 12/25/2022]
Abstract
Lupine is commonly utilized as a technological food and ingredient in a great variety of processed products (snacks, bakery, meat, and dairy products) principally owing to its nutritional value and technological properties. However, its ingestion, even at trace amounts (in the range of mg protein per kg of food), can lead to severe adverse reactions in allergic individuals. Lupine belongs to the Leguminosae family, having the conglutins (α-, β-, δ-, and γ-) as allergens, among other proteins. Cross-sensitization of lupine-sensitized individuals with other legume species, mainly peanut, can occur, but the associated clinical reactivity is still unclear. The protection of the sensitized individuals should depend on an avoidance diet, which should rely on the compliance of food labeling and, as such, on their verification by analytical methods. Food processing, such as heat treatments, has an important influence on the structural properties of lupine proteins, altering their detectability and allergenicity. In this review, different aspects related with lupine allergy are described, namely, the overall prevalence, clinical relevance, diagnosis, and treatment. The characterization of lupine allergens and their potential cross-reactivity with other legumes are critically discussed. The effects of food matrix, processing, and digestibility on lupine proteins, as well as the available analytical tools for detecting lupine at trace levels in foods, are also herein emphasized.
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Affiliation(s)
- Caterina Villa
- REQUIMTE-LAQV, Faculdade de Farmácia, Universidade do Porto, Porto, Portugal
| | - Joana Costa
- REQUIMTE-LAQV, Faculdade de Farmácia, Universidade do Porto, Porto, Portugal
| | - Isabel Mafra
- REQUIMTE-LAQV, Faculdade de Farmácia, Universidade do Porto, Porto, Portugal
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The role of incurred materials in method development and validation to account for food processing effects in food allergen analysis. Anal Bioanal Chem 2019; 411:4465-4480. [PMID: 30758527 DOI: 10.1007/s00216-019-01642-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Revised: 01/22/2019] [Accepted: 01/24/2019] [Indexed: 12/12/2022]
Abstract
The issue of undeclared allergens represents a matter of great concern, being the subject of many alert notifications by the Rapid Alert System for Food and Feed portal of the European Commission, often leading to food recalls. The availability of reliable analytical approaches able to detect and quantify hidden allergens in processed foods is increasingly requested by the food industry, food safety authorities and regulatory bodies to protect sensitive consumers' health. The present review discusses the fundamental role of incurred materials for method development and analytical performance assessment in a metrology perspective on testing for undeclared allergens in processed foodstuffs. Due to the nature of the analytes and their susceptibility to various processing effects, reliability and comparability of results have posed a great challenge. In this context, the use of incurred samples as reference materials permits simulation of the effects of food processing on target analyte structure affecting analyte extractability and detectability. Graphical abstract ᅟ.
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Tomczak A, Zielińska-Dawidziak M, Piasecka-Kwiatkowska D, Springer E, Lampart-Szczapa E. Cross-reactions between proteins isolated from new narrow-leafed lupine breeding lines and antibodies present in the sera of patients sensitized to soybeans and peanuts. Eur Food Res Technol 2018. [DOI: 10.1007/s00217-018-3175-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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7
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Sedighian H, Halabian R, Amani J, Heiat M, Amin M, Fooladi AAI. Staggered Target SELEX, a novel approach to isolate non-cross-reactive aptamer for detection of SEA by apta-qPCR. J Biotechnol 2018; 286:45-55. [PMID: 30236483 DOI: 10.1016/j.jbiotec.2018.09.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2017] [Revised: 05/01/2018] [Accepted: 09/15/2018] [Indexed: 02/07/2023]
Abstract
BACKGROUND AND OBJECTIVE Aptamers or chemical antibodies are oligonucleotides (DNA or RNA) that are able to bind to various targets with high specificity and affinity such as toxins which are isolated by an in vitro method known as SELEX. To date, there are many SELEX procedures for the isolation of novel aptamers against proteins. However not all modified SELEX are suitable for similar protein based on sequence homology such as staphylococcal enterotoxins. Staphylococcal enterotoxin type A (SEA) is the most prevalent toxin involved in staphylococcal food poisoning (SFP) worldwide. SEA is homologous to Staphylococcal enterotoxin type D (SED) and Staphylococcal enterotoxin type E (SEE) about 50% and 83%, respectively. Here, we have developed Staggered Target SELEX (ST-SELEX) as a novel designed SELEX procedure to acquire specific non-cross-reactive aptamers against SEA as a model protein. METHODS In this study, isolated ssDNA aptamers by ST-SELEX were used for detection of SEA via apta-Real time PCR (apta-qPCR). After in silico analysis of SEA protein with SEE and finding the specific region on the surface of protein, ST-SELEX was carried out in two steps (classical SELEX and Second SELEX). Finally, after isolating high specific aptamers, the apta-qPCR was used for the detection of the SEA. In this technique, poly-clonal antibody against SEA was immobilized on protein G sepharose beads (Ab-PGs). Then, the SEA protein was captured by poly clonal antibody as the target that immobilized on sepharose beads. The isolated aptamers were bound on the surface of SEA protein that captured by Ab-PGs. Finally, the heat-released aptamers were amplified by qPCR. RESULT Our investigation showed that the aptamers were generated in vitro by a ten-round selection process based on ST-SELEX procedure with dissociation constant (KD) value 7.44± 0.6 nM and limit of detection (LOD) of 146.67 fM. DISCUSSION AND CONCLUSION The advantage of ST-SELEX compared to other SELEX methods was to select a specific non cross-reactive aptamer against two or more proteins with high sequence homology. These aptamers can be used in sensitive detection methods such as apta-qPCR.
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Affiliation(s)
- Hamid Sedighian
- Applied Microbiology Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Raheleh Halabian
- Applied Microbiology Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Jafar Amani
- Applied Microbiology Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Mohammad Heiat
- Baqiyatallah Research Center for Gastroenterology and Liver Disease, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Mohsen Amin
- Department of Drug and Food Control, and Pharmaceutical Quality Assurance Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Abbas Ali Imani Fooladi
- Applied Microbiology Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran.
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Khedri M, Ramezani M, Rafatpanah H, Abnous K. Detection of food-born allergens with aptamer-based biosensors. Trends Analyt Chem 2018. [DOI: 10.1016/j.trac.2018.04.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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9
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Neethirajan S, Weng X, Tah A, Cordero J, Ragavan K. Nano-biosensor platforms for detecting food allergens – New trends. SENSING AND BIO-SENSING RESEARCH 2018. [DOI: 10.1016/j.sbsr.2018.02.005] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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10
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Jauset-Rubio M, El-Shahawi MS, Bashammakh AS, Alyoubi AO, O′Sullivan CK. Advances in aptamers-based lateral flow assays. Trends Analyt Chem 2017. [DOI: 10.1016/j.trac.2017.10.010] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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11
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DNA biosensors based on gold nanoparticles-modified graphene oxide for the detection of breast cancer biomarkers for early diagnosis. Bioelectrochemistry 2017; 118:91-99. [DOI: 10.1016/j.bioelechem.2017.07.002] [Citation(s) in RCA: 97] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Revised: 07/05/2017] [Accepted: 07/10/2017] [Indexed: 12/20/2022]
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Malekzad H, Jouyban A, Hasanzadeh M, Shadjou N, de la Guardia M. Ensuring food safety using aptamer based assays: Electroanalytical approach. Trends Analyt Chem 2017; 94:77-94. [PMID: 32287541 PMCID: PMC7112916 DOI: 10.1016/j.trac.2017.07.001] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Aptamers, are being increasingly employed as favorable receptors for constructing highly sensitive biosensors, for their remarkable affinities towards certain targets including a wide scope of biological or chemical substances, and their superiority over other biologic receptors. The selectivity and affinity of the aptamers have been integrated with the wise design of the assay, applying suitable modifications, such as nanomaterials on the electrode surface, employing oligonucleotide-specific amplification strategies or, their combinations. After successful performance of the electrochemical aptasensors for biomedical applications, the food sector with its direct implication for human health, which demands rapid and sensitive and economic analytical solutions for determination of health threatening contaminants in all stages of production process, is the next field of research for developing efficient electrochemical aptasensors. The aim of this review is to categorize and introduce food hazards and summarize the recent electrochemical aptasensors that have been developed to address these contaminants.
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Affiliation(s)
- Hedieh Malekzad
- Pharmaceutical Analysis Research Center and Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Abolghasem Jouyban
- Pharmaceutical Analysis Research Center and Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
- Kimia Idea Pardaz Azarbayjan (KIPA) Science Based Company, Tabriz University of Medical Sciences, Tabriz 51664, Iran
| | - Mohammad Hasanzadeh
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Nasrin Shadjou
- Department of Nanochemistry, Nano Technology Research Center, Urmia University, Urmia, Iran
- Department of Nanochemistry, Faculty of Science, Urmia University, Urmia, Iran
| | - Miguel de la Guardia
- Department of Analytical Chemistry, University of Valencia, Dr. Moliner 50, Burjassot 46100, Valencia, Spain
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Abstract
Proteomics encompasses a variety of approaches unraveling both the structural features, post-translational modifications, and abundance of proteins. As of today, proteomic studies have shed light on the primary structure of about 850 allergens, enabling the design of microarrays for improved molecular diagnosis. Proteomic methods including mass spectrometry allow as well to investigate protein-protein interactions, thus yielding precise information on critical epitopes on the surface of allergens. Mass spectrometry is now being applied to the unambiguous identification, characterization, and comprehensive quantification of allergens in a variety of matrices, as diverse as food samples and allergen immunotherapy drug products. As such, it represents a method of choice for quality testing of allergen immunotherapy products.
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14
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Svobodová M, Skouridou V, Botero ML, Jauset-Rubio M, Schubert T, Bashammakh AS, El-Shahawi MS, Alyoubi AO, O'Sullivan CK. The characterization and validation of 17β-estradiol binding aptamers. J Steroid Biochem Mol Biol 2017; 167:14-22. [PMID: 27669644 DOI: 10.1016/j.jsbmb.2016.09.018] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Revised: 09/12/2016] [Accepted: 09/22/2016] [Indexed: 01/26/2023]
Abstract
The rapid and sensitive detection of small molecules is garnering increasing importance, and aptamers show great promise in replacing expensive, elaborate detection platforms exploiting chromatographic separation or antibody-based assays. The characterization of aptamer interaction with small molecule targets is not facile, and there is a mature need for a rapid, high-throughput technique for the analysis of aptamer-small molecule kinetics and affinity. In this work we present methodologies for the evaluation of aptamer-small molecule interactions, using the aptamers reported against the steroid 17β-estradiol as a model system. Microscale thermophoresis, apta-PCR affinity assay and surface plasmon resonance were explored to evaluate the reported aptamers' binding properties in terms of affinity and specificity, and were demonstrated to be successfully applied to the analysis of aptamer-small molecule interactions.
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Affiliation(s)
- Markéta Svobodová
- Interfibio, Nanobiotechnology & Bioanalysis Group, Departament d'Enginyeria Química, Universitat Rovira i Virgili, Avinguda Països Catalans 26, Tarragona 43007, Spain
| | - Vasso Skouridou
- Interfibio, Nanobiotechnology & Bioanalysis Group, Departament d'Enginyeria Química, Universitat Rovira i Virgili, Avinguda Països Catalans 26, Tarragona 43007, Spain.
| | - Mary Luz Botero
- Interfibio, Nanobiotechnology & Bioanalysis Group, Departament d'Enginyeria Química, Universitat Rovira i Virgili, Avinguda Països Catalans 26, Tarragona 43007, Spain
| | - Miriam Jauset-Rubio
- Interfibio, Nanobiotechnology & Bioanalysis Group, Departament d'Enginyeria Química, Universitat Rovira i Virgili, Avinguda Països Catalans 26, Tarragona 43007, Spain
| | - Thomas Schubert
- 2bind GmbH, Josef Engert Strasse 13, Regensburg 93053, Germany
| | - Abdulaziz S Bashammakh
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
| | - Mohammad S El-Shahawi
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
| | - Abdulrahman O Alyoubi
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
| | - Ciara K O'Sullivan
- Interfibio, Nanobiotechnology & Bioanalysis Group, Departament d'Enginyeria Química, Universitat Rovira i Virgili, Avinguda Països Catalans 26, Tarragona 43007, Spain; Institució Catalana de Recerca i Estudis Avançats (ICREA), Passeig Lluís Companys 23, Barcelona 08010, Spain.
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15
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Costa J, Fernandes TJ, Villa C, P.P. Oliveira MB, Mafra I. Advances in Food Allergen Analysis. Food Saf (Tokyo) 2016. [DOI: 10.1002/9781119160588.ch9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
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16
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Ultrasensitive and rapid detection of β-conglutin combining aptamers and isothermal recombinase polymerase amplification. Anal Bioanal Chem 2016; 409:143-149. [PMID: 27766362 DOI: 10.1007/s00216-016-9973-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Revised: 09/14/2016] [Accepted: 09/23/2016] [Indexed: 02/07/2023]
Abstract
Lupin is increasingly being used in a variety of food products due to its nutritional, functional and nutraceutical properties. However, several examples of severe and even fatal food-associated anaphylaxis due to lupin inhalation or ingestion have been reported, resulting in the lupin subunit β-conglutin, being defined as the Lup an 1 allergen by the International Union of Immunological Societies (IUIS) in 2008. Here, we report an innovative method termed aptamer-recombinase polymerase amplification (Apta-RPA) exploiting the affinity and specificity of a DNA aptamer selected against the anaphylactic β-conglutin allergen termed β-conglutin binding aptamer II (β-CBA II), facilitating ultrasensitive detection via isothermal amplification. Combining magnetic beads as the solid phase with Apta-RPA detection, the total assay time was reduced from 210 min to just 25 min, with a limit of detection of 3.5 × 10-11 M, demonstrating a rapid and ultrasensitive generic methodology that can be used with any aptamer. Future work will focus on further simplification of the assay to a lateral flow format. Graphical Abstract Schematic representation of the rapid and novel bead-based Apta-RPA assay.
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17
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Lopez-Barbosa N, Gamarra JD, Osma JF. The future point-of-care detection of disease and its data capture and handling. Anal Bioanal Chem 2016; 408:2827-37. [DOI: 10.1007/s00216-015-9249-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Revised: 11/21/2015] [Accepted: 12/03/2015] [Indexed: 10/22/2022]
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18
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Abstract
Real-time Apta-PCR is a methodology that can be used for a wide variety of applications ranging from food quality control to clinical diagnostics. This method takes advantage of the combination of the sensitivity of nucleic acid amplification with the selectivity of aptamers. Ultra-low detection of target analyte can potentially be achieved, or, improved detection limits can be achieved with aptamers of low-medium affinity. Herein, we describe a generic methodology coined real-time Apta-PCR, using a model target (β-conglutin) and a competitive format, which can be adapted for the detection of any target which an aptamer has been selected for.
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Affiliation(s)
- Alessandro Pinto
- Department of Chemical Engineering, Universitat Rovira I Virgili, Avinguda Päısos Catalans 26, Tarragona, 43007, Spain
- Department of Bioengineering, Rice University, 6500 Main Street, 77030, Houston, TX, USA
| | - Pedro Nadal Polo
- Department of Chemical Engineering, Universitat Rovira I Virgili, Avinguda Päısos Catalans 26, Tarragona, 43007, Spain
- Center for Omic Sciences (COS), Universitat Rovira I Virgili, Avinguda Universitat n° 1, 43204, Reus, Spain
| | - Miriam Jauest Rubio
- Department of Chemical Engineering, Universitat Rovira I Virgili, Avinguda Päısos Catalans 26, Tarragona, 43007, Spain
| | - Marketa Svobodova
- Department of Chemical Engineering, Universitat Rovira I Virgili, Avinguda Päısos Catalans 26, Tarragona, 43007, Spain
| | - Teresa Mairal Lerga
- Department of Chemical Engineering, Universitat Rovira I Virgili, Avinguda Päısos Catalans 26, Tarragona, 43007, Spain
| | - Ciara K O'Sullivan
- Department of Chemical Engineering, Universitat Rovira I Virgili, Avinguda Päısos Catalans 26, Tarragona, 43007, Spain.
- Institució Catalana de Recerca I Estudis Avançats, Passeig Llúıs Companys 23, 08010, Barcelona, Spain.
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Aptamers as Synthetic Receptors for Food Quality and Safety Control. BIOSENSORS FOR SUSTAINABLE FOOD - NEW OPPORTUNITIES AND TECHNICAL CHALLENGES 2016. [DOI: 10.1016/bs.coac.2016.03.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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20
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Sensitive detection of cancer cells using light-mediated apta-PCR. Methods 2015; 97:104-9. [PMID: 26615953 DOI: 10.1016/j.ymeth.2015.11.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Revised: 11/16/2015] [Accepted: 11/23/2015] [Indexed: 11/22/2022] Open
Abstract
Apta-PCR is an ultrasensitive assay in which aptamers are exploited not only as biomolecular recognition elements, but also as reporter labels for amplification via real-time PCR. This methodology has been successfully applied to the detection of proteins, achieving limits of detection in the picomolar range. The introduction of caged aptamers that bear photo-labile groups, so called cages, at strategic positions so that their tertiary structure and thus their binding properties can be controlled by light, facilitates a more robust and attractive assay in terms of sample conservation and reusability. In this work, we report for the first time the use of caged aptamers for cell detection in an apta-PCR assay. Specifically, a sandwich format is used combining the capture of B-cells by an antibody with the specific detection of Burkitt's lymphoma cancer cells by a caged aptamer, acting as a reporter probe. Elution of the aptamer bound to the cancer cells is performed by light and the number of cells is then correlated with the amount of eluted caged aptamer using real-time PCR analysis. The reported technique shows an excellent sensitivity, achieving detection of as few as 77 cells, and due to the inherent robustness of the assay, this detection platform can be reused for further analyses, demonstrating potential applicability in proteomics and clinical diagnostics.
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21
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Jauset Rubio M, Svobodová M, Mairal T, Schubert T, Künne S, Mayer G, O'Sullivan CK. β-Conglutin dual aptamers binding distinct aptatopes. Anal Bioanal Chem 2015; 408:875-84. [PMID: 26586159 DOI: 10.1007/s00216-015-9179-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Revised: 10/25/2015] [Accepted: 11/06/2015] [Indexed: 01/12/2023]
Abstract
An aptamer was previously selected against the anaphylactic allergen β-conglutin (β-CBA I), which was subsequently truncated to an 11-mer and the affinity improved by two orders of magnitude. The work reported here details the selection and characterisation of a second aptamer (β-CBA II) selected against a second aptatope on the β-conglutin target. The affinity of this second aptamer was similar to that of the 11-mer, and its affinity was confirmed by three different techniques at three independent laboratories. This β-CBA II aptamer in combination with the previously selected β-CBA I was then exploited to a dual-aptamer approach. The specific and simultaneous binding of the dual aptamer (β-CBA I and β-CBA II) to different sites of β-conglutin was confirmed using both microscale thermophoresis and surface plasmon resonance where β-CBA II serves as the primary capturing aptamer and β-CBA I or the truncated β-CBA I (11-mer) as the secondary signalling aptamer, which can be further exploited in enzyme-linked aptamer assays and aptasensors.
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Affiliation(s)
- Miriam Jauset Rubio
- Nanobiotechnology and Bioanalysis Group, Department of Chemical Engineering, Universitat Rovira I Virgili, 43007, Tarragona, Spain
| | - Markéta Svobodová
- Nanobiotechnology and Bioanalysis Group, Department of Chemical Engineering, Universitat Rovira I Virgili, 43007, Tarragona, Spain
| | - Teresa Mairal
- Nanobiotechnology and Bioanalysis Group, Department of Chemical Engineering, Universitat Rovira I Virgili, 43007, Tarragona, Spain
| | - Thomas Schubert
- 2bind GmbH, Josef Engert Strasse 13, 93053, Regensburg, Germany
| | - Stefan Künne
- Life and Medical Sciences Institute, University of Bonn, Gerhard-Domagk-Str. 1, 53121, Bonn, Germany
| | - Günter Mayer
- Life and Medical Sciences Institute, University of Bonn, Gerhard-Domagk-Str. 1, 53121, Bonn, Germany
| | - Ciara K O'Sullivan
- Nanobiotechnology and Bioanalysis Group, Department of Chemical Engineering, Universitat Rovira I Virgili, 43007, Tarragona, Spain.
- Institució Catalana de Recerca I Estudis Avancats, Passeig Lluís Companys 23, 08010, Barcelona, Spain.
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Acquah C, Danquah MK, Yon JLS, Sidhu A, Ongkudon CM. A review on immobilised aptamers for high throughput biomolecular detection and screening. Anal Chim Acta 2015; 888:10-8. [PMID: 26320953 DOI: 10.1016/j.aca.2015.05.050] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Revised: 05/20/2015] [Accepted: 05/22/2015] [Indexed: 02/07/2023]
Abstract
The discovery of Systematic Evolution of Ligands by Exponential Enrichment (SELEX) assay has led to the generation of aptamers from libraries of nucleic acids. Concomitantly, aptamer-target recognition and its potential biomedical applications have become a major research endeavour. Aptamers possess unique properties that make them superior biological receptors to antibodies with a plethora of target molecules. Some specific areas of opportunities explored for aptamer-target interactions include biochemical analysis, cell signalling and targeting, biomolecular purification processes, pathogen detection and, clinical diagnosis and therapy. Most of these potential applications rely on the effective immobilisation of aptamers on support systems to probe target species. Hence, recent research focus is geared towards immobilising aptamers as oligosorbents for biodetection and bioscreening. This article seeks to review advances in immobilised aptameric binding with associated successful milestones and respective limitations. A proposal for high throughput bioscreening using continuous polymeric adsorbents is also presented.
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Affiliation(s)
- Caleb Acquah
- Curtin Sarawak Research Institute, Curtin University, Sarawak, 98009, Malaysia; Department of Chemical Engineering, Curtin University, Sarawak, 98009, Malaysia
| | - Michael K Danquah
- Department of Chemical Engineering, Curtin University, Sarawak, 98009, Malaysia.
| | - John L S Yon
- Department of Chemical Engineering, Curtin University, Sarawak, 98009, Malaysia
| | - Amandeep Sidhu
- Curtin Sarawak Research Institute, Curtin University, Sarawak, 98009, Malaysia; Faculty of Health Sciences, Curtin University, Perth, 6109, Australia
| | - Clarence M Ongkudon
- Biotechnology Research Institute, Universiti Malaysia Sabah, Kota Kinabalu, Sabah, 88400, Malaysia
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23
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Jin JH, Kim J, Jeon T, Shin SK, Sohn JR, Yi H, Lee BY. Real-time selective monitoring of allergenic Aspergillus molds using pentameric antibody-immobilized single-walled carbon nanotube-field effect transistors. RSC Adv 2015. [DOI: 10.1039/c4ra15815f] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A SWNT-FET directly functionalized with immunoglobulin M shows a wide detection range from sub-picomolar to micromolar with an excellent sensitivity due to chemical gating in selective monitoring of fungal allergens.
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Affiliation(s)
- Joon-Hyung Jin
- Department of Mechanical Engineering
- Korea University
- Seoul 136-713
- Korea
| | - Junhyup Kim
- Department of Mechanical Engineering
- Korea University
- Seoul 136-713
- Korea
| | - Taejin Jeon
- Department of Mechanical Engineering
- Korea University
- Seoul 136-713
- Korea
| | - Su-Kyoung Shin
- Department of Public Health Science
- Graduate School
- Korea University
- Seoul 136-703
- Korea
| | - Jong-Ryeul Sohn
- Department of Environmental Health
- Korea University
- Seoul 136-703
- Korea
| | - Hana Yi
- Department of Public Health Science
- Graduate School
- Korea University
- Seoul 136-703
- Korea
| | - Byung Yang Lee
- Department of Mechanical Engineering
- Korea University
- Seoul 136-713
- Korea
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24
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Alfaro K, Bustos P, O Sullivan C, Conejeros P. Facile and Cost-Effective Detection of Saxitoxin Exploiting Aptamer Structural Switching. Food Technol Biotechnol 2015; 53:337-341. [PMID: 27904366 DOI: 10.17113/ftb.53.03.15.3911] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
A simple method to detect saxitoxin (STX), one of the main components of the paralytic shellfish poison from red tide, has been developed. By using a next generation dye for double-stranded DNA we were able to differentiate fluorescence from STX-binding aptamers when exposed to different concentrations of STX, suggesting a change in aptamer folding upon target binding. The developed method is extremely rapid, only requiring small sample volumes, with quantitative results in the concentration range of 15 ng/mL to 3 µg/mL of STX, with a detection limit of 7.5 ng/mL.
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Affiliation(s)
- Karol Alfaro
- Centro de Investigación y Gestión de Recursos Naturales, Facultad de Ciencias,
Universidad de Valparaíso, Gran Bretańa 1111, Valparaíso, Chile
| | - Paulina Bustos
- Centro de Investigación y Gestión de Recursos Naturales, Facultad de Ciencias,
Universidad de Valparaíso, Gran Bretańa 1111, Valparaíso, Chile
| | - Ciara O Sullivan
- Nanobiotechnology and Bioanalysis Group, Department of Chemical Engineering,
Universitat Rovira i Virgili, 43007 ES-Tarragona, Spain
| | - Pablo Conejeros
- Centro de Investigación y Gestión de Recursos Naturales, Facultad de Ciencias,
Universidad de Valparaíso, Gran Bretańa 1111, Valparaíso, Chile
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