Acute toxicities of saxitoxin, neosaxitoxin, decarbamoyl saxitoxin and gonyautoxins 1&4 and 2&3 to mice by various routes of administration

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DOIResolve DOI: http://doi.org/10.1016/j.toxicon.2013.09.013
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TypeArticle
Journal titleToxicon
ISSN0041-0101
Volume76
Pages7783; # of pages: 7
Subjectdecarbamoylsaxitoxin; gonyautoxin; neosaxitoxin; saxitoxin; acute toxicity; animal experiment; article; calibration; female; LD 50; mortality; mouse; nonhuman; priority journal; toxicity equivalence factor; toxicological parameters
AbstractSaxitoxin and its derivatives, the paralytic shellfish toxins (PSTs), are known to be toxic to humans, and maximum permitted levels in seafood have been established by regulatory authorities in many countries. Until recently, the mouse bioassay was the reference method for determining the levels of these toxins in seafood, but this has now been superseded by chemical methods of analysis. The latter methods are able to determine the levels of many PSTs in shellfish, but for risk assessment an estimate of the relative toxicities of the individual components of the PST mixture is required. The relative toxicities are expressed as "Toxicity Equivalence Factors" (TEFs). At present, TEFs are based on relative specific activities in the mouse bioassay, rather than on acute toxicity determinations, as measured by median lethal doses (LD50s). In the present study, the median lethal doses of saxitoxin, neosaxitoxin, decarbamoyl saxitoxin and equilibrium mixtures of gonyautoxins 1&4 and gonyautoxins 2&3 have been determined by intraperitoneal injection, gavage and feeding. The results indicate that specific activities in the MBA do not consistently correlate with acute toxicities by any of the routes of administration, and TEFs, particularly for neosaxitoxin, require revision. © 2013 Elsevier Ltd.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); Measurement Science and Standards (MSS-SME)
Peer reviewedYes
NPARC number21269791
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Record identifier381421a0-0db8-4a4e-87af-2096bd8a6044
Record created2013-12-13
Record modified2016-05-09
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