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61,005 resultsShowing papers similar to Effects of Atmospheric Aging on the Respiratory Toxicity of Polystyrene Nanoplastic Particles
ClearEffects of Atmospheric Aging on the Respiratory Toxicityof Polystyrene Nanoplastic Particles
Researchers exposed human bronchial epithelial cells to atmospherically aged polystyrene nanoplastics at an air-liquid interface, finding significantly elevated expression of inflammatory genes IL-8, TNF-α, and IL-6 compared to fresh nanoplastics, demonstrating that environmental aging increases respiratory toxicity.
Uptake of Breathable Nano- and Micro-Sized Polystyrene Particles: Comparison of Virgin and Oxidised nPS/mPS in Human Alveolar Cells
Researchers found that environmentally aged (oxidised) nano- and microplastics were rapidly taken up by human lung cells and caused significantly greater DNA damage, oxidative stress, and mitochondrial impairment compared to pristine particles, highlighting the heightened health risks of weathered airborne plastics.
Unmodified Polystyrene Nanoparticles Induce Inflammatory and Oxidative Stress Responses in Human Lung Epithelial Cells
Exposure of human lung epithelial cells to unmodified polystyrene nanoparticles (60 nm) at concentrations as low as 50 µg/mL reduced cell viability by about 50% and triggered expression of inflammatory genes including IL-6 and CXCL10. These results suggest that nanoplastic particles reaching the respiratory tract could provoke lung inflammation, raising concerns about the health consequences of inhaling airborne nanoplastics.
Uptake of Breathable Nano- and Micro-Sized Polystyrene Particles: Comparison of Virgin and Oxidised nPS/mPS in Human Alveolar Cells
Researchers compared uptake of virgin and oxidized polystyrene nano- and microparticles in human lung cells, finding that photoaged particles showed altered surface chemistry and different cellular internalization patterns relevant to realistic airborne microplastic exposure.
Unveiling the Pulmonary Toxicity of Polystyrene Nanoplastics: A Hierarchical Oxidative Stress Mechanism Driving Acute–Subacute Lung Injury
Researchers investigated the pulmonary toxicity of polystyrene nanoplastics smaller than 100 nm in lung epithelial cells and macrophages, finding that exposure triggered a hierarchical oxidative stress mechanism that drove acute to subacute lung injury through lipid peroxidation and inflammation.
Photoaging of polystyrene microspheres causes oxidative alterations to surface physicochemistry and enhances airway epithelial toxicity
Researchers aged polystyrene microplastics with UV light and then tested their effects on human lung cells. They found that UV-weathered particles caused more pronounced biological responses than fresh ones, including cell cycle disruption, altered cell shape, and impaired wound healing. The study suggests that environmental aging of airborne microplastics may increase their potential to harm respiratory tissues.
In vitro effects of aged low-density polyethylene micro(nano)plastic particles on human airway epithelial cells.
Aged low-density polyethylene (LDPE) micro(nano)plastic particles were found to damage human airway epithelial cells in vitro, causing oxidative stress, inflammation, and cytotoxicity at relevant concentrations. UV-weathered LDPE particles were more toxic than unaged counterparts, highlighting the importance of environmental aging in assessing airborne MP health risks.
Photoaging of polystyrene microspheres causes oxidative alterations to surface physicochemistry and enhances airway epithelial toxicity
Researchers photoaged polystyrene microspheres under ultraviolet radiation for five weeks and then compared their toxicity to pristine microspheres in A549 human lung cells. They found that UV aging increased polar surface groups on the particles and produced more pronounced oxidative stress, cell cycle arrest, and morphological changes than pristine microspheres, with toxicity further shaped by particle size, dose, and exposure duration.
Acute Exposure to Aerosolized Nanoplastics Modulates Redox-Linked Immune Responses in Human Airway Epithelium
Researchers exposed a 3D model of human airway tissue from 14 healthy donors to aerosolized polystyrene nanoplastics over three days and found that while the particles did not cause structural damage, they triggered changes in immune-related gene expression. The nanoplastics activated oxidative stress pathways and altered the expression of genes involved in inflammation and antioxidant defense. The study suggests that even short-term inhalation of nanoplastics could subtly shift immune responses in the airways.
Aging Processes Dramatically Alter the Protein Corona Constitution, Cellular Internalization, and Cytotoxicity of Polystyrene Nanoplastics
Researchers found that aging processes such as UV and ozone exposure dramatically alter how polystyrene nanoplastics interact with blood plasma proteins, form protein coronas, and enter cells. The study suggests that environmentally aged nanoplastics may have different biological effects than pristine particles, which has important implications for accurately assessing the health risks of real-world nanoplastic exposure.
In vitro evaluation of nanoplastics using human lung epithelial cells, microarray analysis and co-culture model
Researchers tested polystyrene nanoplastics on two types of human lung cells and found that the particles caused cell damage, oxidative stress, and inflammation-related gene changes at relatively low concentrations. Using a co-culture model that mimics the lung's layered structure, they showed that nanoplastics can trigger immune responses even in cells not directly exposed. The study suggests that inhaled nanoplastics may pose respiratory health risks through both direct toxicity and inflammatory signaling.
Polystyrene nanoplastics mediate oxidative stress, senescence, and apoptosis in a human alveolar epithelial cell line
A cell study found that polystyrene nanoplastics cause dose-dependent damage to human lung cells, triggering oxidative stress, premature cell aging, and cell death. These findings suggest that breathing in nanoplastics could harm lung tissue over time and potentially contribute to cancer risk from air pollution.
Enhancement of biological effects of oxidised nano- and microplastics in human professional phagocytes
Researchers studied how virgin and environmentally aged polystyrene nano- and microplastics affect human immune cells (monocytes and macrophages). The study found that oxidized particles, which simulate environmental aging, caused significantly greater DNA damage and oxidative stress than virgin particles, suggesting that weathered plastics in the environment may pose higher health risks.
Inflammatory Effects of Microplastics and Nanoplastics on Nasal Airway Epithelial Cells
Researchers found that polystyrene micro- and nanoplastics cause inflammatory cytokine responses in nasal epithelial cells even over short exposure periods. The study also observed ciliary blunting and transcriptional evidence of significant inflammation and stress responses, suggesting that the nasal airway is vulnerable to plastic particle exposure.
Internalization and toxicity: A preliminary study of effects of nanoplastic particles on human lung epithelial cell
Researchers studied the effects of polystyrene nanoplastic particles on human lung cells and found that the particles were internalized by the cells and caused dose-dependent toxicity. The nanoplastics triggered oxidative stress, inflammation, and disrupted normal cell function. The findings suggest that inhaling airborne nanoplastics may pose risks to respiratory health.
Evaluation of the pulmonary toxicity of PSNPs using a Transwell-based normal human bronchial epithelial cell culture system
Researchers used a Transwell air-liquid interface cell culture system to assess how polystyrene nanoplastics affect human bronchial epithelial cells, finding that even ultralow, non-cytotoxic doses triggered inflammatory signaling (NF-κB, NLRP3), while higher doses induced apoptosis and autophagy — suggesting nanoplastics pose a pulmonary health risk at ambient exposure levels.
Sterile inflammation induced by respirable micro and nano polystyrene particles in the pathogenesis of pulmonary diseases
Researchers exposed human lung and immune cells to polystyrene micro and nanoparticles and found they triggered a type of inflammation that does not require infection, called sterile inflammation. Aged (oxidized) particles and those that interacted with immune cells were especially potent at activating inflammatory pathways including the NLRP3 inflammasome. This suggests that breathing in airborne microplastics could cause chronic lung inflammation over time.
Photoaging of polystyrene-based microplastics amplifies inflammatory response in macrophages
Researchers found that polystyrene microplastics aged by sunlight exposure for just three hours triggered stronger inflammatory responses and DNA damage in immune cells than fresh microplastics, even at very low concentrations. The aging process changed the particles' surface properties, making them more biologically reactive. Since most microplastics in the real world have been weathered by sunlight, this study suggests their actual health impact may be greater than lab studies using pristine particles indicate.
Toxic effects of nanoplastics with different sizes and surface charges on epithelial-to-mesenchymal transition in A549 cells and the potential toxicological mechanism
Researchers exposed human lung cells to polystyrene nanoplastics of different sizes and surface charges and found they triggered a process called epithelial-to-mesenchymal transition, which is associated with the early stages of lung fibrosis. Smaller particles and those with positive surface charges caused the strongest effects, activating oxidative stress and inflammatory pathways. The study suggests that inhaled nanoplastics could contribute to respiratory health risks by promoting tissue scarring in the lungs.
Toxicological assays and metabolomic profiling to evaluate the effects of virgin and aged micro- and nano- polystyrene plastics in SH-SY5Y human neuroblastoma cells
Human neuroblastoma cells exposed to polystyrene micro- and nanoplastics showed oxidative stress, DNA damage, and disrupted energy and amino acid metabolism, with aged and oxidized particles causing the worst effects. Since plastics in the environment are typically weathered rather than fresh, this suggests that real-world nanoplastic exposure may pose greater risks to brain cells than lab studies using pristine particles have indicated.
Size- and oxidative potential-dependent toxicity of environmentally relevant expanded polystyrene styrofoam microplastics to macrophages
Researchers tested how Styrofoam microplastics of different sizes and weathering conditions affect human immune cells and found that smaller particles, UV-weathered particles, and those from real-world sources were all more toxic. The microplastics triggered inflammation through a pathway called the NLRP3 inflammasome, which is linked to many chronic diseases. This is concerning because most Styrofoam in the environment has been weathered by sunlight, meaning the real-world health risks may be worse than lab studies using fresh materials suggest.
Cytotoxicity analysis of polystyrene nanoplastics in the bronchial epithelial cell line BEAS-2B
Researchers exposed bronchial epithelial cells to europium-doped polystyrene nanoplastics to assess cytotoxicity in a model of the human airway. The nanoplastics caused dose-dependent cell death and inflammatory signaling, supporting concerns about respiratory health effects from inhaled plastic particles.
Pristine and artificially-aged polystyrene microplastic particles differ in regard to cellular response
Researchers compared the cellular effects of pristine laboratory polystyrene microplastics with artificially aged particles that better represent real-world environmental conditions. They found that aged microplastics triggered different immune cell responses than pristine ones, including altered inflammatory signaling and uptake patterns. The study highlights that standard laboratory testing with new plastic particles may underestimate the actual biological effects of weathered microplastics found in the environment.
Effects of weathering and simulated gastric fluid exposure on cellular responses to polystyrene particles
Researchers studied the effects of weathering and simulated gastric fluid exposure on cellular responses to polystyrene particles. The study suggests that environmental weathering can alter how micro- and nanoplastics interact with biological systems, with potential implications for understanding human health effects from ingested plastic particles.