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

Type Article
Date 2020-05
Language English
Author(s) Roué Mélanie1, 2, Smith Kirsty F.3, Sibat ManoellaORCID4, Viallon Jérôme, Henry Kévin2, Ung André2, Biessy Laura3, Hess PhilippORCID4, Darius Hélène Taiana2, Chinain Mireille2
Affiliation(s) 1 : Institut de Recherche pour le Développement, UMR 241 EIO, 98702 Faa’a, Tahiti, French Polynesia
2 : Institut Louis Malardé, UMR 241 EIO, 98713 Papeete, Tahiti, French Polynesia
3 : Cawthron Institute, Nelson 7042, New Zealand
4 : Ifremer, DYNECO, 44000 Nantes, France
Source Toxins (2072-6651) (MDPI AG), 2020-05 , Vol. 12 , N. 5 , P. 321 (18p.)
DOI 10.3390/toxins12050321
Note This article belongs to the Special Issue Ciguatoxins
Keyword(s) ciguatera monitoring, Gambierdiscus, ciguatoxins, SPATT passive samplers, HP20 resin, CBA-N2a, LC-MS, MS, WS artificial substrate, qPCR, HTS metabarcoding
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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Roué Mélanie, Smith Kirsty F., Sibat Manoella, Viallon Jérôme, Henry Kévin, Ung André, Biessy Laura, Hess Philipp, Darius Hélène Taiana, Chinain Mireille (2020). Assessment of Ciguatera and Other Phycotoxin-Related Risks in Anaho Bay (Nuku Hiva Island, French Polynesia): Molecular, Toxicological, and Chemical Analyses of Passive Samplers. Toxins, 12(5), 321 (18p.). Publisher's official version : https://doi.org/10.3390/toxins12050321 , Open Access version : https://archimer.ifremer.fr/doc/00629/74143/