Journal
TOXICOLOGIC PATHOLOGY
Volume 30, Issue 6, Pages 723-734Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/01926230290166814
Keywords
methylmercury; common marmoset; MRI (magnetic resonance imaging); peripheral neuropathy; axonal degeneration
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Common marmosets were used as model animals for methylmercury (MeHg) poisoning. Six marmosets were given MeHg of 5 ppm Hg in drinking water. The animals were divided into 3 groups of 2 each. The first group was examined for acute symptomatic MeHg poisoning. They were given MeHg for 70 and 90 days, respectively, to manifest severe symptoms. The second group was sacrificed after 38 days of MeHg exposure, when they had acute-subclinical MeHg poisoning. The third group of animals was exposed for 21 days, and then observed for 2.5 years without MeHg exposure. One of them showed typical symptoms of MeHg poisoning after MeHg exposure had ended, but the other one showed only slight symptoms without ataxia. This experiment demonstrated that MeHg causes pathological changes in neural tissues including the peripheral nerves in common marmosets. Furthermore, common marmosets were found to show MeHg-induced pathological changes similar to those in humans in the cerebrum and cerebellum.
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