Miyazawa K, Jeon J K, Noguchi T, Ito K, Hashimoto K
Faculty of Applied Biological Science, Hiroshima University, Japan.
Toxicon. 1987;25(9):975-80. doi: 10.1016/0041-0101(87)90160-7.
tetrodotoxin distribution in various tissues of the flatworm Planocera multitentaculata was examined. The oviduct was most toxic (2000-3240 MU/g), followed by digestive organs (900-1400 MU/g), oviduct-free genital organs (430-590 MU/g), etc. The mucus secreted also showed some lethal potency. On the other hand, the eggs laid, whether in laboratory aquarium or on coastal rocks, exhibited an extremely high potency up to 10,700 MU/g. It was suggested from these findings that flatworms possess tetrodotoxin as a defense or alarm substance against predators.
研究了多触手扁形虫（Planocera multitentaculata）各组织中的河豚毒素分布情况。输卵管毒性最强（2000 - 3240鼠单位/克），其次是消化器官（900 - 1400鼠单位/克）、不含输卵管的生殖器官（430 - 590鼠单位/克）等。分泌的黏液也显示出一定的致死效力。另一方面，无论产在实验室水族箱还是海岸岩石上的卵，都具有高达10700鼠单位/克的极强效力。从这些发现推测，扁形虫将河豚毒素作为抵御捕食者的防御或警示物质。
