Fundamental Toxicological Sciences

Paper Details

Fundamental Toxicological Sciences
Vol. 6 No. 4 June 13, 2019 p.137-143
Genotoxicity evaluation of oil prepared from the internal organs of the Japanese giant scallop (Patinopecten yessoensis)
  • Ryota Hosomi (Faculty of Chemistry, Materials, and Bioengineering, Kansai University /
Koki Sugimoto 1) , Ryota Hosomi 1) , Kenji Fukunaga 1) , Takaki Shimono 2) , Seiji Kanda 2) , Toshimasa Nishiyama 2) , Munehiro Yoshida 1) , Takeya Yoshioka 3) , Koretaro Takahashi 4) 5)
1) Faculty of Chemistry, Materials, and Bioengineering, Kansai University , 2) Department of Hygiene and Public Health, Kansai Medical University , 3) Research and Development Division, Food Technology Group , 4) Faculty of Engineering, Kitami Institute of Technology , 5) Previous address: Faculty of Fisheries Sciences, Hokkaido University
Keywords: n-3 Polyunsaturated fatty acids, Eicosapentaenoic acid, Docosahexaenoic acid, Scallop internal organs, Genotoxicity

Discarded scallop internal organs, especially the hepatopancreas, are rich in n-3 polyunsaturated fatty acids such as eicosapentaenoic acid and docosahexaenoic acid. However, they have not been utilized because of their contamination with toxic substances, such as cadmium (Cd), and the occurrence of diarrheic shellfish toxins (DST). We have successfully prepared a high-quality scallop oil (SCO) from the internal organs of the Japanese giant scallop (Patinopecten yessoensis), including the hepatopancreas without Cd and DST. These pollutants were removed by liquid-liquid partitioning followed by adsorption to active carbon of fine particle size with high pore surface volume. In this study, we prepared SCO from scallop internal organs obtained from two different processing areas (Mutsu and Uchiura bays, Japan), and referred to them as SCO-M and SCO-U, respectively. Genotoxicity of SCO-M and SCO-U was evaluated by the in vitro bacterial reverse mutation test (Ames test) and in vivo micronucleus test in accordance with the Organisation for Economic Co-operation and Development guidelines. SCO-M and SCO-U showed negative results in the Ames test in the presence or absence of metabolic activation with S9 mix. In addition, no genotoxic effects of SCO-M and SCO-U were observed at all tested doses in the micronucleus test. Based on the results of the present study, it can be concluded that SCO-M and SCO-U are safe products in terms of genotoxicity under these experimental conditions.