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Updated: May 26, 2026
08:37
Microglia as a Surrogate Biosensor to Determine Nanoparticle Neurotoxicity
Published on: October 25, 2016
Neurotoxicity of engineered nanoparticles from metals
Hari Shanker Sharma1, Aruna Sharma
1Laboratory of Cerebrovascular Research, Anesthesiology & Intensive Care Medicine, University Hospital, Uppsala University, SE-75185, Sweden. Sharma@surgsci.uu.se
CNS & Neurological Disorders Drug Targets
|January 11, 2012
Summary
Metal nanoparticles like silver and copper can cause neurotoxicity in the brain, affecting sensory, motor, and cognitive functions. This review details their impact and potential mechanisms of harm.
Area of Science:
- Neuroscience
- Toxicology
- Materials Science
Background:
- Occupational exposure to metal nanoparticles (Ag, Cu, Al) is common in industries like automotive, aerospace, and electronics.
- Nanoparticles (20-120 nm) can be inhaled, reaching the brain and potentially causing long-term effects.
- The in vivo pathophysiological reactions of nanoparticles on brain function remain largely unknown.
Purpose of the Study:
- To investigate the neurotoxic effects of engineered metal nanoparticles (Ag, Cu, Al) in vivo.
- To analyze the impact of nanoparticle type, dose, and exposure duration on brain function.
- To discuss the functional significance and mechanisms of metal nanoparticle-induced neurotoxicity.
Main Methods:
- Administration of engineered nanoparticles (50-60 nm) via systemic or intracerebral routes in rats and mice.
- Assessment of neurotoxicity, including neuronal, glial, axonal, and endothelial cell damage.
- Evaluation of alterations in sensory, motor, and cognitive functions.
Main Results:
- Engineered nanoparticles (Ag, Cu, Al) induced neurotoxicity in a dose- and duration-dependent manner.
- Silver (Ag) and copper (Cu) nanoparticles caused more pronounced neuronal and cellular damage than aluminum (Al) nanoparticles.
- Neurotoxicity effects were more severe in mice compared to rats.
Conclusions:
- Metal nanoparticles pose a significant neurotoxic risk, impacting various brain cell types and functions.
- The type of metal nanoparticle and species (mouse vs. rat) influences the severity of neurotoxicity.
- Further research is needed to fully elucidate the mechanisms underlying nanoparticle-induced neurotoxicity.
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