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Are synapses targets of nanoparticles?
Sergei V Fedorovich1, Alexandra V Alekseenko, Tatyana V Waseem
1Institute of Biophysics and Cell Engineering, National Academy of Sciences of Belarus, Akademicheskaya Str., 27, Minsk 220072, Belarus. fedorovich@ipb.org.by
Biochemical Society Transactions
|March 20, 2010
Summary
Nanoparticles, like ferritin, may harm the central nervous system by disrupting glutamate uptake and increasing free radicals. This can lead to neuronal damage and neurodegeneration, impacting brain health.
Area of Science:
- Nanotechnology
- Neuroscience
- Toxicology
Background:
- Nanoparticle applications are emerging for central nervous system (CNS) disease diagnosis and treatment.
- In vivo nanoparticle exposure is linked to increased neurodegenerative disease risk.
- Neurons and microglial cells are potential targets for nanoparticles in the brain.
Purpose of the Study:
- To investigate the effects of ferritin nanoparticles on presynaptic terminals.
- To determine if ferritin influences glutamate neurotransmission.
- To assess ferritin's role in reactive oxygen species (ROS) generation.
Main Methods:
- Using [(14)C]glutamate to measure glutamate uptake and release.
- Employing the fluorescent dye DCFH-DA to monitor free radical formation.
- Testing varying concentrations of ferritin nanoparticles.
Main Results:
- Ferritin did not induce spontaneous glutamate release.
- Ferritin inhibited [(14)C]glutamate uptake in a dose-dependent manner.
- Ferritin exposure led to a dose-dependent increase in free radical formation.
Conclusions:
- Ferritin nanoparticles impact glutamatergic neurotransmission at presynaptic terminals.
- Ferritin-induced oxidative stress contributes to neuronal damage.
- These findings suggest a mechanism by which nanoparticles may cause neurodegeneration.
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