Size-Dependent Toxicity of Polystyrene Microplastics in Lung Cells: An in Vivo and in Vitro Study

Toxicological effects of different particle sizes and types of nano-plastics (NPs) on human lung cells: implications for the health risk of airborne microplastic pollution

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Researchers exposed human A549 alveolar cells to polystyrene and polymethylmethacrylate nanoplastics of 30 and 50 nm and found that smaller size and higher concentration produced stronger cytotoxicity, oxidative stress, inflammation, and apoptosis—with PS nanoparticles more toxic than PMMA—providing in vitro evidence of respiratory health risks from inhaled airborne nanoplastics.

Comparison of lung disorders following intratracheal instillation of polystyrene microplastics with different surface functional groups

The Impact of Polystyrene Microplastics in Living Organisms; Environmental and Ecological Concerns

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This review comprehensively examined the environmental and ecological impacts of polystyrene microplastics, which readily adsorb both organic and inorganic pollutants and carry them into living organisms. Polystyrene is one of the most widely produced plastics globally, and its breakdown into microplastics creates particles that act as vectors for toxic chemicals in ecosystems and potentially in human bodies.

Cellular and Animal Toxicities of Micro- and Nanoplastics

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Researchers reviewed evidence from cell and animal studies on the toxic effects of micro- and nanoplastics, finding that these particles can cause inflammation, oxidative stress, and organ damage in laboratory models, raising concern about what chronic low-level human exposure might mean for long-term health.

Comparative Semi-quantitative Assessment of the Accumulation of 100 Nm and 1000 Nm Polystyrene Microparticles in Rat Lung Tissue Following a Single Exposure

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Researchers compared the accumulation of 100 nm and 1000 nm polystyrene microparticles in rat lung tissue following a single exposure, using semi-quantitative assessment methods to characterize size-dependent differences in particle deposition and retention within pulmonary tissue.