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Organic neurotoxins in seafoods
1University of Hawaii, Neurology Service, Tripler Army Medical Center, Honolulu 96859, USA.
Clinical Neurology and Neurosurgery
|May 1, 1995
Summary
Seafood can be contaminated with organic toxins, causing distinct poisoning syndromes. These neurotoxins affect sodium channels or glutamate receptors, leading to neurological deficits.
Area of Science:
- Marine biology
- Toxicology
- Neuroscience
Background:
- Organic toxins from microorganisms accumulate in predatory seafood.
- These toxins cause seafood poisoning, distinct from chemical contamination or infections.
- Specific toxins and their associated clinical syndromes have been identified.
Purpose of the Study:
- To review the identified marine biotoxins and their mechanisms of action.
- To describe the clinical manifestations of seafood poisoning caused by these toxins.
Main Methods:
- Literature review of identified marine biotoxins.
- Analysis of clinical syndromes associated with specific toxins.
- Examination of molecular mechanisms of toxin interaction with ion channels and receptors.
Main Results:
- Tetrodotoxin and saxitoxin block sodium channels.
- Ciguatoxin activates sodium channels.
- Domoic acid stimulates N-methyl-D-aspartate (NMDA) receptors, affecting excitatory amino acids.
Conclusions:
- Marine biotoxins represent a significant food safety concern.
- Understanding toxin mechanisms aids in diagnosing and managing seafood poisoning.
- Further research into toxin identification and mitigation is warranted.