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Further advance of Gambierdiscus Species in the Canary Islands, with the First Report of Gambierdiscus belizeanus

Tudó, Àngels LU ; Gaiani, Greta ; Varela, Maria Rey ; Tsumuraya, Takeshi ; Andree, Karl B. ; Fernández-Tejedor, Margarita ; Campàs, Mònica and Diogène, Jorge (2020) In Toxins 12(11).
Abstract

Ciguatera Poisoning (CP) is a human food-borne poisoning that has been known since ancient times to be found mainly in tropical and subtropical areas, which occurs when fish or very rarely invertebrates contaminated with ciguatoxins (CTXs) are consumed. The genus of marine benthic dinoflagellates Gambierdiscus produces CTX precursors. The presence of Gambierdiscus species in a region is one indicator of CP risk. The Canary Islands (North Eastern Atlantic Ocean) is an area where CP cases have been reported since 2004. In the present study, samplings for Gambierdiscus cells were conducted in this area during 2016 and 2017. Gambierdiscus cells were isolated and identified as G. australes, G. excentricus, G. caribaeus, and G.... (More)

Ciguatera Poisoning (CP) is a human food-borne poisoning that has been known since ancient times to be found mainly in tropical and subtropical areas, which occurs when fish or very rarely invertebrates contaminated with ciguatoxins (CTXs) are consumed. The genus of marine benthic dinoflagellates Gambierdiscus produces CTX precursors. The presence of Gambierdiscus species in a region is one indicator of CP risk. The Canary Islands (North Eastern Atlantic Ocean) is an area where CP cases have been reported since 2004. In the present study, samplings for Gambierdiscus cells were conducted in this area during 2016 and 2017. Gambierdiscus cells were isolated and identified as G. australes, G. excentricus, G. caribaeus, and G. belizeanus by molecular analysis. In this study, G. belizeanus is reported for the first time in the Canary Islands. Gambierdiscus isolates were cultured, and the CTX-like toxicity of forty-one strains was evaluated with the neuroblastoma cell-based assay (neuro-2a CBA). G. excentricus exhibited the highest CTX-like toxicity (9.5-2566.7 fg CTX1B equiv. cell-1) followed by G. australes (1.7-452.6.2 fg CTX1B equiv. cell-1). By contrast, the toxicity of G. belizeanus was low (5.6 fg CTX1B equiv. cell-1), and G. caribaeus did not exhibit CTX-like toxicity. In addition, for the G. belizeanus strain, the production of CTXs was evaluated with a colorimetric immunoassay and an electrochemical immunosensor resulting in G. belizeanus producing two types of CTX congeners (CTX1B and CTX3C series congeners) and can contribute to CP in the Canary Islands.

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author
; ; ; ; ; ; and
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Animals, Atlantic Ocean, Cell Line, Tumor, Cell Survival/drug effects, Ciguatoxins/metabolism, Dinoflagellida/classification, Ecosystem, Mice, Neurons/drug effects, Phylogeny, Seawater, Spain
in
Toxins
volume
12
issue
11
article number
692
pages
23 pages
publisher
MDPI AG
external identifiers
  • pmid:33142836
  • scopus:85095584192
ISSN
2072-6651
DOI
10.3390/toxins12110692
language
English
LU publication?
no
id
566aa893-b312-4123-955c-cb4e5b310c73
date added to LUP
2022-07-22 16:58:53
date last changed
2024-06-01 00:08:49
@article{566aa893-b312-4123-955c-cb4e5b310c73,
  abstract     = {{<p>Ciguatera Poisoning (CP) is a human food-borne poisoning that has been known since ancient times to be found mainly in tropical and subtropical areas, which occurs when fish or very rarely invertebrates contaminated with ciguatoxins (CTXs) are consumed. The genus of marine benthic dinoflagellates  Gambierdiscus produces CTX precursors. The presence of  Gambierdiscus species in a region is one indicator of CP risk. The Canary Islands (North Eastern Atlantic Ocean) is an area where CP cases have been reported since 2004. In the present study, samplings for  Gambierdiscus cells were conducted in this area during 2016 and 2017.  Gambierdiscus cells were isolated and identified as  G. australes,  G. excentricus,  G. caribaeus, and  G. belizeanus by molecular analysis. In this study,  G. belizeanus is reported for the first time in the Canary Islands.  Gambierdiscus isolates were cultured, and the CTX-like toxicity of forty-one strains was evaluated with the neuroblastoma cell-based assay (neuro-2a CBA).  G. excentricus exhibited the highest CTX-like toxicity (9.5-2566.7 fg CTX1B equiv. cell<sup>-1</sup>) followed by  G. australes (1.7-452.6.2 fg CTX1B equiv. cell<sup>-1</sup>). By contrast, the toxicity of  G. belizeanus was low (5.6 fg CTX1B equiv. cell<sup>-1</sup>), and  G. caribaeus did not exhibit CTX-like toxicity. In addition, for the  G. belizeanus strain, the production of CTXs was evaluated with a colorimetric immunoassay and an electrochemical immunosensor resulting in G. belizeanus producing two types of CTX congeners (CTX1B and CTX3C series congeners) and can contribute to CP in the Canary Islands. </p>}},
  author       = {{Tudó, Àngels and Gaiani, Greta and Varela, Maria Rey and Tsumuraya, Takeshi and Andree, Karl B. and Fernández-Tejedor, Margarita and Campàs, Mònica and Diogène, Jorge}},
  issn         = {{2072-6651}},
  keywords     = {{Animals; Atlantic Ocean; Cell Line, Tumor; Cell Survival/drug effects; Ciguatoxins/metabolism; Dinoflagellida/classification; Ecosystem; Mice; Neurons/drug effects; Phylogeny; Seawater; Spain}},
  language     = {{eng}},
  month        = {{10}},
  number       = {{11}},
  publisher    = {{MDPI AG}},
  series       = {{Toxins}},
  title        = {{Further advance of <i>Gambierdiscus </i>Species in the Canary Islands, with the First Report of <i>Gambierdiscus belizeanus</i>}},
  url          = {{http://dx.doi.org/10.3390/toxins12110692}},
  doi          = {{10.3390/toxins12110692}},
  volume       = {{12}},
  year         = {{2020}},
}