Please use this identifier to cite or link to this item: https://hdl.handle.net/10216/129834
Author(s): Abal, P
Louzao, M
Vilariño, N
Vieytes, M
Botana, L
Title: Acute Toxicity Assessment: Macroscopic and Ultrastructural Effects in Mice Treated with Oral Tetrodotoxin
Publisher: MDPI
Issue Date: 2019
Abstract: Tetrodotoxin (TTX) is an extremely toxic marine compound produced by different genera of bacteria that can reach humans through ingestion mainly of pufferfish but also of other contaminated fish species, marine gastropods or bivalves. TTX blocks voltage-gated sodium channels inhibiting neurotransmission, which in severe cases triggers cardiorespiratory failure. Although TTX has been responsible for many human intoxications limited toxicological data are available. The recent expansion of TTX from Asian to European waters and diversification of TTX-bearing organisms entail an emerging risk of food poisoning. This study is focused on the acute toxicity assessment of TTX administered to mice by oral gavage following macroscopic and microscopic studies. Necropsy revealed that TTX induced stomach swelling 2 h after administration, even though no ultrastructural alterations were further detected. However, transmission electron microscopy images showed an increase of lipid droplets in hepatocytes, swollen mitochondria in spleens, and alterations of rough endoplasmic reticulum in intestines as hallmarks of the cellular damage. These findings suggested that gastrointestinal effects should be considered when evaluating human TTX poisoning.
Subject: tetrodotoxin
macroscopic alterations
ultrastructural changes
gastrointestinal effect
mitochondria swelling
rough endoplasmic reticulum swelling
URI: https://hdl.handle.net/10216/129834
Series: Toxins 2019, 11(6), 305
Document Type: Artigo em Revista Científica Internacional
Rights: openAccess
Appears in Collections:CIIMAR - Artigo em Revista Científica Internacional

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