Effects of methylmercury on the morphogenesis of the rat cerebellum
| Autor: | Mottet Nk, Howard Jd |
|---|---|
| Rok vydání: | 1986 |
| Předmět: |
Embryology
medicine.medical_specialty Cerebellum Health Toxicology and Mutagenesis Population Morphogenesis Mitosis Biology Toxicology chemistry.chemical_compound Pregnancy Internal medicine medicine Animals education Maternal-Fetal Exchange Methylmercury education.field_of_study Cell growth Rats Inbred Strains Methylmercury Compounds Cell cycle Rats Microscopy Electron Endocrinology medicine.anatomical_structure chemistry Female Breast feeding Developmental Biology |
| Zdroj: | Teratology. 34:89-95 |
| ISSN: | 1096-9926 0040-3709 |
| DOI: | 10.1002/tera.1420340112 |
| Popis: | Developing rat cerebellums were examined following continuous methylmercury exposure via maternal drinking water at 12.5 ppm during gestation and the suckling period. The continuous exposure resulted in reductions of the total cerebellar cell population and higher mercury tissue burdens than previous acute-dose studies. Cell necrosis was not evident, but rather alterations in the pattern of mitotic figures were observed. A decreased number of cells in the methylmercury exposed cerebellums was associated with an increased number of mitotic figures in the early stages of mitosis and a decrease in the number in the middle and late stages. These in vivo exposure observations are consistent with in vitro cell cycle studies in which the cells were found to have accumulated in G2 and early M phases. Impaired cell proliferation is suggested to be a major mechanism of developmental neurotoxicity following continuous low-dose exposure to methylmercury. |
| Databáze: | OpenAIRE |
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