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[Histopathological and electron microscopic changes in mice treated with puffer fish toxin]
1Yamaguchi Prefectural Research Institute of Health, Japan.
The Journal of Toxicological Sciences
|June 1, 1996
Summary
Tetrodotoxin (TTX) from pufferfish ovary primarily impacts mouse nerve tissues. Even small doses cause vacuolation and mitochondrial changes in nerve cells, indicating TTX
Area of Science:
- Toxicology
- Neuroscience
- Histopathology
Context:
- Tetrodotoxin (TTX), a potent neurotoxin, is found in pufferfish ovaries.
- Understanding TTX's cellular effects is crucial for risk assessment and potential therapeutic insights.
Purpose:
- To investigate the histopathological and cytopathological effects of varying tetrodotoxin (TTX) doses on male ddY mice.
- To identify specific tissues and cellular structures affected by TTX administration.
Summary:
- Mice received intraperitoneal injections of crude TTX extracts (0.42 and 0.21 µg/ml).
- Macroscopic observation revealed gallbladder inflation; microscopic examination showed congestion in multiple organs.
- Nerve cells in the slower-acting group (0.21 µg/ml) exhibited vacuolation and Nissl body disappearance, linked to mitochondrial damage, with similar synaptic changes observed.
Impact:
- Demonstrates that TTX's primary cytopathological effects are concentrated in nerve tissues, particularly at lower doses.
- Highlights mitochondrial degeneration as a key mechanism in TTX-induced neurotoxicity.
- Provides foundational data for studying neurotoxin mechanisms and developing safety protocols for handling TTX-containing substances.