Related Experiment Videos
Distribution of manganese in development.
1Oklahoma Center for Toxicology, College of Pharmacy, University of Oklahoma, Health Sciences Center, Oklahoma City 73190, USA. fechter@uokhsc.edu
Neurotoxicology
|July 1, 1999
Summary
Manganese elimination matures after weaning, but young animals absorb it more efficiently. Perinatal manganese exposure may lead to toxic accumulation in developing organs, impacting long-term health.
Area of Science:
- Toxicology
- Developmental Biology
- Nutritional Science
Background:
- Manganese homeostasis is crucial, regulated by uptake and elimination.
- Manganese elimination matures post-weaning, with higher intestinal uptake in young animals.
- Perinatal manganese exposure may cause toxic accumulation in developing organisms.
Purpose of the Study:
- To review manganese uptake and distribution after prenatal and pre-weaning exposure.
- To assess neonatal manganese elimination efficiency.
- To examine regional brain manganese distribution.
Main Methods:
- Review of studies using various model systems.
- Analysis of data on placental transfer and fetal tissue distribution.
- Evaluation of neonatal elimination following tracer and toxic manganese exposure.
Main Results:
- Manganese crosses the placenta, but transfer to fetal tissues is limited.
- Neonatal rodents demonstrate more effective manganese elimination than previously thought.
- Data on regional brain manganese distribution show inconsistencies regarding concentration in specific areas.
Conclusions:
- Prenatal and pre-weaning manganese exposure warrants careful consideration due to potential for accumulation.
- Neonatal manganese elimination is more robust than suggested by earlier tracer studies.
- Further research is needed to clarify regional brain manganese distribution and its implications.