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Ciguatoxins are a class of toxic polycyclic polyethers found in fish that cause ciguatera. There are several different chemicals in this class. "CTX" is often used as an abbreviation. * - Ciguatoxin 1 * - Ciguatoxin 2 * - Ciguatoxin 3 * - Ciguatoxin 4B (Gambiertoxin 4b) ==Toxic effect== Some ciguatoxins lower the threshold for opening voltage-gated sodium channels in synapses of the nervous system. Opening a sodium channel causes depolarization, which could sequentially cause paralysis, heart contraction, and changing the senses of heat and cold. The condition is known as ciguatera. Ciguatoxins are lipophillic, able to cross the blood brain barrier, and can cause both central and peripheral neurologic symptoms. The major symptoms will develop within 1-3 hours of toxin ingestion: vomiting, diarrhea, numbness of extremities, mouth and lips, reversal of hot and cold sensation, muscle and joint aches. The symptoms may last from days to weeks or even months depending on each individual situation. There is no known antidote. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ciguatoxin」の詳細全文を読む スポンサード リンク
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