Combined Oral Toxicity of Azaspiracid-1 and Yessotoxin in Female NMRI Mice
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Marine Institute Open Access Repository (OAR) Combined oral toxicity of azaspiracid-1 and yessotoxin in female NMRI mice John A. B. Aasen*1, Arild Espenes2, Christopher O. Miles3,4, Ingunn A. Samdal3, Philipp Hess5,6, Tore Aune1 1Norwegian School of Veterinary Science, Department of Food Safety and Infection Biology, P.O. Box 8146 Dep., 0033 Oslo, Norway. 2Norwegian School of Veterinary Science, Department of Basic Sciences and Aquatic Medicine, P.O. Box 8146 Dep., 0033 Oslo, Norway. 3Norwegian Veterinary Institute, P.O. Box 750 Sentrum, NO-0106 Oslo, Norway. 4AgResearch Ltd, Ruakura Research Centre, Private Bag 3123, Hamilton 3240, New Zealand. 5Marine Institute, Renville, Oranmore, Co. Galway, Ireland. 6 IFREMER, Department of Environment, Microbiology & Phycotoxins, Rue de l’Île d’Yeu, 44311 Nantes Cedex 03, France. 1 Abstract For many years, the presence of yessotoxins (YTXs) in shellfish has contributed to the outcome of the traditional mouse bioassay and has on many occasions caused closure of shellfisheries. Since YTXs do not appear to cause diarrhoea in man and exert low oral toxicity in animal experiments, it has been suggested that they should be removed from regulation. Before doing so, it is important to determine whether the oral toxicity of YTXs is enhanced when present together with shellfish toxins known to cause damage to the gastrointestinal tract. Consequently, mice were given high doses of YTX, at 1 or 5 mg/kg body weight, either alone or together with azaspiracid-1 (AZA1) at 200 µg/kg.
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