Fundamental Toxicological Sciences

Paper Details

Fundamental Toxicological Sciences
Vol. 7 No. 4 May 27, 2020 p.177-188
Repeated 28-day and 13-week dose toxicity studies of oils prepared from the internal organs of the Japanese giant scallop (Patinopecten yessoensis) in rats
  • Ryota Hosomi (Faculty of Chemistry, Materials, and Bioengineering, Kansai University /
Koki Sugimoto 1) , Eito Shimizu 1) , Nozomi Hagihara 1) , Ryota Hosomi 1) , Kenji Fukunaga 1) , Munehiro Yoshida 1) , Takeya Yoshioka 2) , Koretaro Takahashi 3) 4)
1) Faculty of Chemistry, Materials, and Bioengineering, Kansai University , 2) Research and Development Division, Food Technology Group, Hokkaido Industrial Technology Center , 3) Faculty of Engineering, Kitami Institute of Technology , 4) Previous address: Faculty of Fisheries Sciences, Hokkaido University
Keywords: n-3 Polyunsaturated fatty acids, Eicosapentaenoic acid, Docosahexaenoic acid, Scallop internal organs, Safety study

The discarded internal organs of the Japanese giant scallop (Patinopecten yessoensis) are abundant resources rich in n-3 polyunsaturated fatty acids (PUFA), such as eicosapentaenoic acid and docosahexaenoic acid. However, they have not been utilized due to contamination with toxic substances such as cadmium (Cd) and the occurrence of diarrhetic shellfish toxins (DST). We have successfully prepared a high-quality scallop oil (SCO) from its internal organs with negligible contamination with Cd and DST. The scallop internal organs were obtained from two different scallop processing areas, Mutsu and Uchiura bays, Japan, and referred to as SCO-M and SCO-U, respectively. To evaluate the safeties of SCO-M and SCO-U as food ingredients and n-3 PUFA supplements, repeated 28-day and 13-week dose oral toxicity studies in rats were conducted. Rats were fed diets containing 1% and 5% of SCO-M and SCO-U, respectively, in the repeated 28-day dose oral toxicity study and 5% SCO-M or SCO-U in the repeated 13-week dose oral toxicity study (limit test). No adverse toxicological effects were observed when rats were fed diets containing SCO-M and/or SCO-U at up to 5% for 28 days and 13 weeks. These results suggest that SCO-M and SCO-U are safe products in terms of subacute toxicity under these experimental conditions.