Assessment of Ciguatera and Other Phycotoxin-Related Risks in Anaho Bay (Nuku Hiva Island, French Polynesia): Molecular, Toxicological, and Chemical Analyses of Passive Samplers

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ID: 116983
2020
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Abstract
Ciguatera poisoning is a foodborne illness caused by the consumption of seafood contaminated with ciguatoxins (CTXs) produced by dinoflagellates from the genera Gambierdiscus and Fukuyoa. The suitability of Solid Phase Adsorption Toxin Tracking (SPATT) technology for the monitoring of dissolved CTXs in the marine environment has recently been demonstrated. To refine the use of this passive monitoring tool in ciguateric areas, the effects of deployment time and sampler format on the adsorption of CTXs by HP20 resin were assessed in Anaho Bay (Nuku Hiva Island, French Polynesia), a well-known ciguatera hotspot. Toxicity data assessed by means of the mouse neuroblastoma cell-based assay (CBA-N2a) showed that a 24 h deployment of 2.5 g of resin allowed concentrating quantifiable amounts of CTXs on SPATT samplers. The CTX levels varied with increasing deployment time, resin load, and surface area. In addition to CTXs, okadaic acid (OA) and dinophysistoxin-1 (DTX1) were also detected in SPATT extracts using liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS), consistent with the presence of Gambierdiscus and Prorocentrum species in the environment, as assessed by quantitative polymerase chain reaction (qPCR) and high-throughput sequencing (HTS) metabarcoding analyses conducted on passive window screen (WS) artificial substrate samples. Although these preliminary findings await further confirmation in follow-up studies, they highlight the usefulness of SPATT samplers in the routine surveillance of CP risk on a temporal scale, and the monitoring of other phycotoxin-related risks in ciguatera-prone areas.
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chinain2020toxinsassessment Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Mélanie Roué,Kirsty F. Smith,Manoëlla Sibat,Jérôme Viallon,Kévin Henry,André Ung,Laura Biessy,Philipp Hess,Hélène Taiana Darius,Mireille Chinain;Mélanie Roué;Kirsty F. Smith;Manoëlla Sibat;Jérôme Viallon;Kévin Henry;André Ung;Laura Biessy;Philipp Hess;Hélène Taiana Darius;Mireille Chinain;
Journal Toxins
Year 2020
DOI
10.3390/toxins12050321
URL
https://sciprofiles.com/publication/view/8730ae66a587f2aa3cc325daddcea6c1
Keywords
lc-ms/ms qpcr gambierdiscus ciguatoxins hp20 resin cba-n2a ciguatera monitoring spatt passive samplers ws artificial substrate hts metabarcoding lc-ms/ms qpcr gambierdiscus ciguatoxins hp20 resin cba-n2a ciguatera monitoring spatt passive samplers ws artificial substrate hts metabarcoding

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