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Velasco A, Ramilo-Fernández G, Denis F, Oliveira L, Shum P, Silva H, Sotelo CG. A New Rapid Method for the Authentication of Common Octopus ( Octopus vulgaris) in Seafood Products Using Recombinase Polymerase Amplification (RPA) and Lateral Flow Assay (LFA). Foods 2021; 10:foods10081825. [PMID: 34441601 PMCID: PMC8394702 DOI: 10.3390/foods10081825] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 07/23/2021] [Accepted: 08/05/2021] [Indexed: 11/16/2022] Open
Abstract
The common octopus (Octopus vulgaris) is a highly valued cephalopod species which is marketed with different grades of processing, such as frozen, cooked or even canned, and is likely to be mislabeled. Some molecular methods have been developed for the authentication of these products, but they are either labor-intensive and/or require specialized equipment and personnel. This work describes a newly designed rapid, sensitive and easy-to-use method for the detection of Octopus vulgaris in food products, based on Recombinase Polymerase Amplification (RPA) and a detection using a Lateral Flow assay (LFA). After studying several gene markers, a system of primers and nfo-probe was designed in the COI (Cytochrome Oxidase I) region and was successfully tested in 32 reference samples (covering 14 species) and 32 commercial products, after optimization. The method was also validated in a ring trial with eight European laboratories and represents a useful tool for food authenticity control at all levels of the value chain.
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Affiliation(s)
- Amaya Velasco
- Instituto de Investigaciones Marinas (IIM-CSIC), Eduardo Cabello 6, 36208 Pontevedra, Spain; (G.R.-F.); (C.G.S.)
- Correspondence: ; Tel.: +34-986231930
| | - Graciela Ramilo-Fernández
- Instituto de Investigaciones Marinas (IIM-CSIC), Eduardo Cabello 6, 36208 Pontevedra, Spain; (G.R.-F.); (C.G.S.)
| | - Françoise Denis
- BOREA MNHN, CNRS 8067, SU, IRD 207, UCN, UA-BIOSSE Le Mans Université, 72000 Le Mans, France;
| | - Luís Oliveira
- Instituto Português do Mar e da Atmosfera (IPMA, I.P.), Av. Dr. Alfredo Magalhães Ramalho 6, 1495-165 Algés, Portugal; (L.O.); (H.S.)
| | - Peter Shum
- School of Biological and Environmental Sciences, Liverpool John Moores University (LJMU), Liverpool L2 2QP, UK;
| | - Helena Silva
- Instituto Português do Mar e da Atmosfera (IPMA, I.P.), Av. Dr. Alfredo Magalhães Ramalho 6, 1495-165 Algés, Portugal; (L.O.); (H.S.)
| | - Carmen G. Sotelo
- Instituto de Investigaciones Marinas (IIM-CSIC), Eduardo Cabello 6, 36208 Pontevedra, Spain; (G.R.-F.); (C.G.S.)
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Guglielmetti C, Brusadore S, Sciuto S, Esposito G, Manfredi M, Marengo E, Bozzetta E, Acutis PL, Mazza M. Wild or Farmed Gilthead Seabream (Sparus aurata)? How To Distinguish between Them by Two-Dimensional Gel Electrophoresis. J Food Prot 2021; 84:592-596. [PMID: 33211848 DOI: 10.4315/jfp-20-244] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 11/14/2020] [Indexed: 11/11/2022]
Abstract
ABSTRACT Because the world's wild fish stocks are limited and the market demand is increasing, fish farming has become an alternative food source and a way to reduce costs for consumers. The sale of farmed as wild fish is a fraudulent practice; it is, therefore, important to find new and alternative tools that can help in the fight against fraud to protect consumers and to ensure food traceability. The proteomic profiles of farmed and wild fish differ. With this study we wanted to identify liver protein markers via two-dimensional electrophoresis that would allow us to distinguish wild from farmed gilthead seabream. The liver samples from 32 gilthead seabream, wild and farmed, were stored at -80°C before protein extraction. The samples were subjected to two-dimensional electrophoresis to detect qualitative and quantitative differences. Proteomic analysis showed a protein spot (molecular weight of ∼34 kDa and isoelectric point of ∼6.9) only in the samples from the wild gilthead seabream; liquid chromatography-tandem mass spectrometry identified the spot as ubiquitin. Ubiquitin could be a valid marker to differentiate wild from farmed gilthead seabream; it could be used to ensure continuous monitoring throughout the entire commercial chain and to fight commercial fraud. HIGHLIGHTS
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Affiliation(s)
- Chiara Guglielmetti
- Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Via Bologna 148, 10154 Turin, Italy.,(ORCID: https://orcid.org/0000-0002-1246-5230 [C.G.])
| | - Sonia Brusadore
- Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Via Bologna 148, 10154 Turin, Italy
| | - Simona Sciuto
- Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Via Bologna 148, 10154 Turin, Italy
| | - Giovanna Esposito
- Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Via Bologna 148, 10154 Turin, Italy
| | - Marcello Manfredi
- ISALIT S.r.l., Spin-off dell'Università del Piemonte Orientale, and 5Dipartimento di Scienze ed Innovazione Tecnologica, Università del Piemonte Orientale, Viale Teresa Michel 11, 15121 Alessandria, Italy.,Center for Translational Research on Autoimmune and Allergic Diseases, Università del Piemonte Orientale, Corso Trieste 15, 28100, Novara, Italy.,Dipartimento di Medicina Traslazionale, Università del Piemonte Orientale, Via Solaroli 17, 28100, Novara, Italy
| | - Emilio Marengo
- Center for Translational Research on Autoimmune and Allergic Diseases, Università del Piemonte Orientale, Corso Trieste 15, 28100, Novara, Italy
| | - Elena Bozzetta
- Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Via Bologna 148, 10154 Turin, Italy
| | - Pier Luigi Acutis
- Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Via Bologna 148, 10154 Turin, Italy
| | - Maria Mazza
- Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Via Bologna 148, 10154 Turin, Italy
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Design of a user-friendly and rapid DNA microarray assay for the authentication of ten important food fish species. Food Chem 2019; 311:125884. [PMID: 31810726 DOI: 10.1016/j.foodchem.2019.125884] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 08/05/2019] [Accepted: 11/09/2019] [Indexed: 12/27/2022]
Abstract
Seafood is particularly susceptible to the substitution of species. In order to guarantee authentic seafood products, seafood processors and traders must perform self-checks on the authenticity of imported and purchased goods. However, the conventional Sanger sequencing of PCR products for the authentication of seafood species is time-consuming and requires advanced infrastructure. DNA microarrays (DNA chips) with species-specific oligonucleotide probes represent a rapid alternative to sequencing-based species authentication. So far, though, only DNA microarrays for the authentication of land vertebrate species have achieved market success. In this work, a user-friendly DNA microarray assay was developed for the authentication of ten important food fish species that can be performed in four to five hours from start to end. The assay was tested with authenticated specimens from 67 different fish species, and by comparing the probe signal patterns all target species and even closely related non-target species could be distinguished.
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