Marine Drugs (Mar 2023)

Levels of Tetrodotoxins in Spawning Pufferfish, <i>Takifugu alboplumbeus</i>

  • Masaki Asano,
  • Chihiro Ishizaki,
  • Taiga Tomonou,
  • Masato Kihara,
  • Masaaki Ito,
  • Shino Yasukawa,
  • Kyoko Shirai,
  • Hikaru Oyama,
  • Shin Izawa,
  • Reona Kawamura,
  • Kanae Saito,
  • Rei Suo,
  • Ryota Nakahigashi,
  • Masaatsu Adachi,
  • Toshio Nishikawa,
  • Haruo Sugita,
  • Shiro Itoi

DOI
https://doi.org/10.3390/md21040207
Journal volume & issue
Vol. 21, no. 4
p. 207

Abstract

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Tetrodotoxin (TTX), also known as pufferfish toxin, is an extremely potent neurotoxin thought to be used as a biological defense compound in organisms bearing it. Although TTX was thought to function as a chemical agent for defense and anti-predation and an attractant for TTX-bearing animals including pufferfish, it has recently been demonstrated that pufferfish were also attracted to 5,6,11-trideoxyTTX, a related compound, rather than TTX alone. In this study, we attempted to estimate the roles of TTXs (TTX and 5,6,11-trideoxyTTX) in the pufferfish, Takifugu alboplumbeus, through examining the location of TTXs in various tissues of spawning pufferfish from Enoshima and Kamogawa, Japan. TTXs levels in the Kamogawa population were higher than those in the Enoshima population, and there was no significant difference in the amount of TTXs between the sexes in either population. Individual differences were greater in females than in males. However, the location of both substances in tissues differed significantly between sexes: male pufferfish accumulated most of their TTX in the skin and liver and most of their 5,6,11-trideoxyTTX in the skin, whereas females accumulated most of their TTX and 5,6,11-trideoxyTTX in the ovaries and skin.

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