A Multisystemic Approach Revealed Aminated Polystyrene Nanoparticles-Induced Neurotoxicity

Area of Science:

• Environmental Toxicology
• Nanomaterial Safety
• Neuroscience

Background:

• Plastic nanoparticle exposure has risen significantly.
• Potential for nanoparticles to cross the blood-brain barrier (BBB) is known.
• Limited comparative data exists on nanoparticle neurotoxicity.

Purpose of the Study:

• Characterize polystyrene (PS) and amine-functionalized PS (PS-NH2) nanoparticles.
• Investigate nanoparticle toxicity using a multi-systemic in vitro and in vivo approach.
• Assess neurotoxic effects of plastic nanoparticles on neuronal cells and model organisms.

Main Methods:

• Physicochemical characterization of PS and PS-NH2 nanoparticles.
• In vitro cytotoxicity assays using mammalian neuroblastoma cell cultures.
• In vivo toxicological studies using Caenorhabditis elegans (C. elegans) model.

Main Results:

• PS-NH2 particles exhibited specific cytotoxicity in vitro, reducing neuronal differentiation and increasing amyloid-beta (Aβ) secretion.
• In vivo, PS-NH2 exposure impaired C. elegans development and reduced lifespan.
• C. elegans expressing human Aβ showed increased sensitivity to PS-NH2 nanoparticles.

Conclusions:

• Aminated polystyrene nanoparticles demonstrate clear neurotoxic effects.
• A multi-systemic approach effectively reveals nanoparticle-induced neurotoxicity.
• Findings suggest potential neurological risks associated with aminated plastic nanoparticles.