| 毒性 |
A toxincontained in the ovary and liver of puffer fish, in the eggs ofthe California newt and in some other animals. It is used as achemical tool for the study of ion channels. The s.c. LD50 inmice is 10 mg/kg. It is a toxicant of nerve and muscle byblocking sodium channels, this action causing nerve and muscle paralysis. Symptoms include weakening of voluntary muscles, respiratory failure from paralysis of the diaphragm andhypotension. There is no antidote. Therapy involves artificialrespiration.
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