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Cytotoxicity and Genotoxicity of Polystyrene Micro- and Nanoplastics with Different Size and Surface Modification in A549 Cells
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Researchers tested polystyrene micro- and nanoplastics of different sizes and surface modifications on human lung cells to evaluate their potential toxicity. They found that particle size, surface chemistry, and how particles interact with surrounding biological fluids all significantly influenced cellular damage and DNA harm. The study highlights that the toxicity of plastic particles in humans depends on multiple physical and chemical properties, not just their presence.
This study shows that the intrinsic size properties and surface modification of PS plastics, the interaction between PS plastics and the receiving medium, intracellular accumulation are critical factors for evaluating the toxicological influences of PS plastics on humans.
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Effects of polystyrene micro/nanoplastics on liver cells based on particle size, surface functionalization, concentration and exposure period
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Researchers systematically studied the effects of polystyrene micro- and nanoplastics on human liver cells, varying particle size, surface chemistry, concentration, and exposure duration. They found that smaller particles were internalized more readily and that surface functionalization significantly influenced toxicity, with aminated particles causing the most cell damage. The study suggests that particle characteristics beyond just size play an important role in determining how micro- and nanoplastics affect human cells.
Polystyrene microplastic particles: In vitro pulmonary toxicity assessment
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Researchers tested the effects of polystyrene microplastics on human lung cells in the laboratory and found that the particles triggered inflammation and oxidative stress. The microplastics also weakened the protective barrier function of lung tissue by depleting key structural proteins. The study suggests that inhaling microplastics may increase the risk of respiratory problems by damaging the lung's natural defenses.
Genotoxicity of polystyrene and polyethylene micro- and nanoparticles in human lung (A549) and liver (HepG2) cell lines
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Lab tests on human lung and liver cells exposed to tiny polystyrene and polyethylene plastic particles found modest reductions in cell survival and some DNA damage, more so in liver cells. Effects varied by plastic type and cell type, and were not clearly linked to oxidative stress.
Short-Term Cellular Responses to Sub-100 nm PMMA and Polystyrene-Based Copolymer Nanoplastics in Human Embryonic Lung Fibroblasts: Cytotoxicity and Redox-Associated Markers
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Scientists exposed human lung cells to tiny plastic particles, the kind you might inhale from air pollution, and found that different plastic types affected cell stress and damage responses differently, with one formulation causing harm at much lower amounts than others. This early lab study suggests not all nanoplastics are equally risky, but more research is needed before we understand real-world health effects.
A549 as an In Vitro Model to Evaluate the Impact of Microplastics in the Air
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This review examines studies using human lung cells grown in the lab to understand how airborne microplastics may affect the respiratory system. Researchers found that polystyrene micro- and nanoplastics can trigger inflammation, DNA damage, oxidative stress, and cell death in lung tissue. The evidence indicates that inhaled microplastics may pose meaningful risks to respiratory health, though more research is needed on real-world exposure levels.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.