Acute toxicities of saxitoxin, neosaxitoxin, decarbamoyl saxitoxin and gonyautoxins 14 and 23 to mice by various routes of administration
| Autor: | Cory J Murphy, Ryan S. Gibbs, Michael A. Quilliam, Rex Munday, Krista Thomas |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
medicine.medical_treatment
animal experiment Neosaxitoxin Intraperitoneal injection Administration Oral toxicological parameters acute toxicity Biology Pharmacology Toxicology Median lethal dose Lethal Dose 50 decarbamoylsaxitoxin chemistry.chemical_compound Mice medicine Animals mouse Saxitoxin LD 50 food and beverages calibration medicine.disease neosaxitoxin mortality Acute toxicity Shellfish poisoning gonyautoxin female chemistry toxicity equivalence factor Toxicity Marine Toxins Marine toxin Injections Intraperitoneal |
| Zdroj: | Toxicon : official journal of the International Society on Toxinology. 76 |
| ISSN: | 1879-3150 |
| Popis: | Saxitoxin 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mouse bioassay was the reference method for determining the levels of these toxins in seafood, but this has now been superseded by chemical methods of analysis.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. |
| Databáze: | OpenAIRE |
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