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Toxicon. 2013 Sep;71:128-33. doi: 10.1016/j.toxicon.2013.05.018. Epub 2013 Jun 5.

Comparison of the localization of tetrodotoxin between wild pufferfish Takifugu rubripes juveniles and hatchery-reared juveniles with tetrodotoxin administration.

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  • 1Graduate School of Fisheries Science and Environmental Studies, Nagasaki University, 1-14 Bunkyo-Machi, Nagasaki 852-8521, Japan.


To reveal the accumulation profile of tetrodotoxin (TTX) in pufferfish Takifugu rubripes juveniles, we compared the localization of TTX in various tissues among wild juveniles and hatchery-reared juveniles with or without TTX administration using immunohistochemical technique with anti-TTX monoclonal antibody. Immuno-positive reaction was observed in hepatic tissue, basal cell of skin and olfactory, olfactory epithelium, optic nerve and brain (optic tectum, cerebellum, medulla oblongata) of wild juveniles (body length: BL, 4.7-9.4 cm). TTX was detected in the same tissues as wild juveniles and epithelial cell layer of intestine of hatchery-reared juveniles (BL, 5.0-5.3 cm) to which TTX was orally administrated. No positive reaction was observed from the tissues of hatchery-reared juveniles without TTX administration. These results suggest that orally administrated TTX to the non-toxic cultured juveniles is accumulated in the same manner of wild juveniles. In addition, our study revealed that pufferfish accumulates TTX in the central nervous system.

Copyright © 2013 Elsevier Ltd. All rights reserved.


Central nervous system; Immunohistochemistry; Pufferfish; Takifugu rublipes; Tetrodotoxin (TTX)

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