Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Tuesday 6th February 2018 from 11.00am to 11.15am (GMT).

During this time our website performance may be temporarily affected. If you have any questions please use the feedback button available under our menu button. We apologise for any inconvenience this might cause and thank you for your patience.

Issue 2, 2017
Previous Article Next Article

Chronic ciguatoxin poisoning causes emotional and cognitive dysfunctions in rats

Author affiliations


Ciguatoxins are marine biotoxins that induce the human poisoning syndrome known as ciguatera fish poisoning (CFP). In humans, different kinds of neurological symptoms have been reported after CFP, including anxiety, depression and memory loss. Repetitive exposures to sub-threshold levels of ciguatera toxins may cause irreversible sub-clinical damage, and eventually cause more severe illness. Our previous study has shown that an acute single dose of Pacific ciguatoxin-1 (P-CTX-1) induced synaptic facilitation and blockage of the induction of electrical stimulation-induced long-term potentiation in the medial thalamus–anterior cingulate cortex pathway. Reactive astrogliosis was detected in acute ciguatera poisoning. Despite the reports of complex and prolonged neurological symptoms in patients, few studies have been conducted in animal models to investigate the emotional and cognitive deficits after chronic exposure to ciguatoxin. In the present study, using a rat model with repeated exposures to low dosage of P-CTX-1, we observed development of anxiety-like behavior by open field test and elevated plus maze test, and learning and memory deficits by the Morris water maze; further, decision-making impairment was determined in the chronic P-CTX-1-treated rats by the rats gambling task. We conclude that chronic ciguatera poisoning leads to anxiety, and to impairment of spatial reference memory and decision-making behavior.

Graphical abstract: Chronic ciguatoxin poisoning causes emotional and cognitive dysfunctions in rats

Back to tab navigation

Publication details

The article was received on 16 Dec 2015, accepted on 06 Jun 2016 and first published on 08 Jun 2016

Article type: Paper
DOI: 10.1039/C5TX00475F
Citation: Toxicol. Res., 2017,6, 179-187
  •   Request permissions

    Chronic ciguatoxin poisoning causes emotional and cognitive dysfunctions in rats

    J. Wang, B. Cao, X. Yang, J. Wu, L. L. Chan and Y. Li, Toxicol. Res., 2017, 6, 179
    DOI: 10.1039/C5TX00475F

Search articles by author