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[Changes in the cerebral microcirculatory bed under molybdenum exposure].
N V Markarian1, I B Meliksetian
1Laboratory of Histochemistry and Morphology, L.A. Orbeli Institute of Physiology, National Academy of Sciences of Armenia, Yerevan.
Morfologiia (Saint Petersburg, Russia)
|April 14, 2000
Summary
Large doses of molybdenum caused significant capillary narrowing in rat brains, potentially leading to trophic insufficiency and contributing to molybdenum toxicosis.
Area of Science:
- Neuroscience
- Toxicology
- Histochemistry
Context:
- Molybdenum is an essential trace element, but high doses can be toxic.
- Understanding the effects of heavy metal exposure on the brain is crucial for public health.
Purpose:
- To investigate the impact of high-dose molybdenum exposure on the brain's microvasculature.
- To elucidate the pathogenetic mechanisms of molybdenum-induced toxicosis at the microcirculatory level.
Summary:
- Histochemical analysis revealed a 30-55% reduction in capillary diameter in the brain hemispheres of rats exposed to high molybdenum doses.
- This capillary constriction suggests a potential for impaired blood flow and nutrient delivery.
Impact:
- The findings suggest capillary trophic insufficiency as a key factor in molybdenum toxicosis.
- This research provides insights into the neurotoxic effects of molybdenum, informing potential therapeutic strategies.