ArticleHeliyon2024
Analytical and functional profiles of paralytic shellfish toxins extracted from
Article in Heliyon, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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8 authors at 1 institution in 1 country.
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Abstract
Paralytic shellfish poisoning is a foodborne illness that typically derive from the consumption of shellfish contaminated with saxitoxin-group of toxins produced by dinoflagellates of the genus Gymnodinium, Alexandrium and Pyrodinium. N-sulfocarbamoyl, carbamate and dicarbamoyl are the most abundant. In 2007 and 2008 some episodes of PSP occurred in Angola where there is not monitoring program for shellfish contamination with marine biotoxins. Therefore, ten samples extracted from Semele proficua from Luanda Bay and Senilia senilis from Mussulo Bay, were analyzed by HPLC finding saxitoxin, decarbamoylsaxitoxin and other three compounds that have an unusual profile different to the known hydrophilic PSP toxins were found in different amounts and combinations. These new compounds were not autofluorescent, and they presented much stronger response after peroxide oxidation than after periodate oxidation. The compounds appear as peaks eluted at 2.5 and 5.6 min after periodate oxidation and 8.2 min after peroxide oxidation. Electrophysiological studies revealed that none of the three unknown compounds had effect at cellular level by decreasing the maximum peak inward sodium currents by blocking voltage-gated sodium channels. Thus, not contributing to PSP intoxication. The presence in all samples of saxitoxin-group compounds poses a risk to human health and remarks the need to further explore the presence of new compounds that contaminate seafood, investigating their activity and developing monitoring programs.
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