Author, as appears in the article.: Gines, Iris; Gaiani, Greta; Ruhela, Ankur; Skouridou, Vasso; Campas, Monica; Masip, Lluis
Department: Enginyeria Química
URV's Author/s: CAMPAS HOMS, MONICA / GINÉS MIR, IRIS / Masip Vernis, Lluis / Ruhela, Ankur / Skouridou, Vasoula
Keywords: Sccro dna binding protein Quantification Pathogen detection Nucleic acids Nanoparticles Lateral flow dipstick Islands ne atlantic Identification Harmful microalgae Gonyaulacales Gambierdiscus Enumeration Ecosystem Dinoflagellida Dinoflagellate Ciguatoxins Ciguatera poisoning Carbon nanoparticles Biosensor Amplification
Abstract: The proliferation of harmful microalgae endangers aquatic ecosystems and can have serious economic implications on a global level. Harmful microalgae and their associated toxins also pose a threat to human health since they can cause seafood-borne diseases such as ciguatera. Implementation of DNA-based molecular methods together with appropriate detection strategies in monitoring programs can support the efforts for effective prevention of potential outbreaks. A PCR-lateral flow assay (PCR-LFA) in dipstick format was developed in this work for the detection of two Gambierdiscus species, G. australes and G. excentricus, which are known to produce highly potent neurotoxins known as ciguatoxins and have been associated with ciguatera outbreaks. Duplex PCR amplification of genomic DNA from strains of these species utilizing species-specific ssDNA tailed primers and a common primer containing the binding sequence of scCro DNA binding protein resulted in the generation of hybrid ssDNA-dsDNA amplicons. These were captured on the dipsticks via hybridization with complementary probes and detected with a scCro/carbon nanoparticle (scCro/CNPs) conjugate. The two different test zones on the dipsticks allowed the discrimination of the two species and the assay exhibited high sensitivity, 6.3 pg/mu L of genomic DNA from both G. australes and G. excentricus. The specificity of the approach was also demonstrated using genomic DNA from non-target Gambierdiscus species and other microalgae genera which did not produce any signals. The possibility to use cells directly for amplification instead of purified genomic DNA suggested the compatibility of the approach with field sample testing. Future work is required to further explore the potential use of the strategy for on-site analysis and its applicability to other toxic species.
Thematic Areas: Zootecnia / recursos pesqueiros Plant science Marine & freshwater biology Interdisciplinar Geociências Farmacia Engenharias i Ciências biológicas iii Ciências biológicas ii Ciências biológicas i Biotecnología Biodiversidade Aquatic science
licence for use: https://creativecommons.org/licenses/by/3.0/es/
Author's mail: vasoula.skouridou@urv.cat monica.campas@urv.cat ankur.ruhela@estudiants.urv.cat ankur.ruhela@estudiants.urv.cat lluis.masip@urv.cat
Author identifier: 0000-0002-9712-5429 0000-0002-1220-7100 0000-0001-9407-5844 0000-0001-9407-5844 0000-0002-3938-4633
Record's date: 2024-10-12
Papper version: info:eu-repo/semantics/publishedVersion
Link to the original source: https://www.sciencedirect.com/science/article/pii/S1568988321001657
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: Harmful Algae. 110 102135-
APA: Gines, Iris; Gaiani, Greta; Ruhela, Ankur; Skouridou, Vasso; Campas, Monica; Masip, Lluis (2021). Nucleic acid lateral flow dipstick assay for the duplex detection of Gambierdiscus australes and Gambierdiscus excentricus. Harmful Algae, 110(), 102135-. DOI: 10.1016/j.hal.2021.102135
Article's DOI: 10.1016/j.hal.2021.102135
Entity: Universitat Rovira i Virgili
Journal publication year: 2021
Publication Type: Journal Publications
Repositori URV