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61,005 resultsShowing papers similar to Differential response of SNU-1826 colon cells on the autophagy, ER stress, and inflammation during the regulation of microplastic internalization
ClearAutophagic response of intestinal epithelial cells exposed to polystyrene nanoplastics
Researchers found that polystyrene nanoplastics accumulate in the cytoplasm of intestinal epithelial cells, impairing autophagic flux and triggering an autophagic stress response confirmed in both cell and animal models.
Polystyrene Microplastics of Varying Sizes and Shapes Induce Distinct Redox and Mitochondrial Stress Responses in a Caco-2 Monolayer
Researchers tested three sizes and shapes of polystyrene microplastics on human intestinal cells and found that all were taken up by the cells, with the smallest particles (200 nm) causing the most pronounced effects on cellular stress responses. The microplastics triggered changes in antioxidant gene expression and mitochondrial activity. The study suggests that the number of particles a cell absorbs, driven largely by particle size, determines the severity of the stress response.
Stress Response of Mouse Embryonic Fibroblasts Exposed to Polystyrene Nanoplastics
Mouse embryonic fibroblasts exposed to polystyrene nanoplastics internalized particles via endocytosis without losing viability, but showed activation of antioxidant and autophagic stress pathways, suggesting subcellular dysfunction even in the absence of cell death.
The potential effects of microplastic pollution on human digestive tract cells
Researchers tested polystyrene particles of four different sizes on human colon and small intestine cells to assess the potential effects of microplastic ingestion. They found that the smallest nanoscale particles were more readily taken up by cells and caused greater reductions in cell viability and increased oxidative stress. The study suggests that smaller plastic particles may pose a greater risk to the human digestive tract than larger ones.
The internal dose makes the poison: higher internalization of polystyrene particles induce increased perturbation of macrophages
Researchers exposed human macrophages, key immune cells, to polystyrene particles of different sizes and found that smaller particles were internalized more readily and caused greater cellular disruption. Nanoscale plastics triggered stronger inflammatory responses and more oxidative stress than larger microplastics. The study suggests that the amount of plastic actually absorbed by immune cells, not just the amount present in the environment, determines how harmful the exposure is.
Comparative evaluation of molecular mechanisms triggered by differently functionalized polystyrene nanoplastics in human colon cell lines
Researchers compared molecular and cellular mechanisms triggered by differently surface-functionalized micro- and nanoplastics in human intestinal and liver cells, finding that surface chemistry strongly determines biological effects. Functionalized particles elicited distinct patterns of oxidative stress, inflammation, and membrane damage compared to unfunctionalized particles.
Comparative evaluation of molecular mechanisms triggered by differently functionalized polystyrene nanoplastics in human colon cell lines
Researchers compared the molecular mechanisms triggered by polystyrene nanoplastics with different surface functionalization in human colon cell lines. The study examined how surface chemistry of nanoplastic particles influences their biological interactions with intestinal cells, contributing to understanding of how nanoplastics may affect the human gastrointestinal system.
Polystyrene micro and nano-particles induce metabolic rewiring in normal human colon cells: A risk factor for human health
Researchers exposed normal human colon cells to polystyrene micro and nanoplastic particles and observed significant metabolic changes in the cells. The study found that these plastic particles altered energy metabolism and cellular pathways in ways that could increase vulnerability to disease. These findings raise concerns that routine ingestion of microplastics through contaminated food may affect normal intestinal cell function in humans.
Polystyrene nanoplastics of different particle sizes regulate the polarization of pro-inflammatory macrophages
Researchers exposed immune cells called macrophages to polystyrene nanoplastics of two different sizes (50 nm and 500 nm) and found that both sizes pushed the cells toward a pro-inflammatory state at higher concentrations. This means the immune cells shifted toward producing inflammation signals rather than healing signals after nanoplastic exposure. Since macrophages are a key defense in the gut, this inflammatory response could help explain how microplastics contribute to intestinal inflammation.
Comparative evaluation of molecular mechanisms triggered by differently functionalized polystyrene nanoplastics in human colon cell lines
Researchers compared the molecular responses triggered by polystyrene nanoplastics with different surface chemical groups in human colon cell lines. The study investigated how the specific functionalization of nanoplastic surfaces influences the cellular and molecular pathways activated upon exposure in human intestinal tissue.
Regulation of Oxidative Stress-Related Signaling Pathways in Tetrahymena pyriformis Exposed to Micro- and Nanoplastics
Researchers exposed the protozoan Tetrahymena pyriformis to polystyrene micro- and nanoplastics and found uptake of both particle types along with activation of multiple oxidative stress signaling pathways, demonstrating cellular stress responses in this model organism.
Hazard Assessment of Polystyrene Nanoplastics in Primary Human Nasal Epithelial Cells, Focusing on the Autophagic Effects
Researchers exposed primary human nasal epithelial cells to polystyrene nanoplastics of two sizes and found that the smaller particles caused more significant cellular changes, including activation of autophagy pathways. The nanoplastics triggered oxidative stress and altered cell processes related to waste recycling within cells. The study highlights the potential health risks of inhaling airborne nanoplastics, an exposure route that remains understudied.
Impact of Environmental Microplastic Exposure on Caco-2 Cells: Unraveling Proliferation, Apoptosis, and Autophagy Activation
Researchers exposed human intestinal cells to polyethylene and PET microplastics of different sizes and observed significant decreases in cell survival along with increased oxidative stress. The microplastics triggered both programmed cell death (apoptosis) and the cell's self-recycling process (autophagy), with effects varying by particle size. The study suggests that microplastic exposure may compromise the intestinal barrier through multiple pathways of cellular damage.
Polystyrene Micro- and Nanoplastic Exposure Triggers an Activation and Stress Response in Human Astrocytes
Researchers exposed primary human astrocytes to polystyrene micro- and nanoplastics and found that these particles triggered cellular stress responses, including increased production of reactive oxygen species and activation of inflammatory pathways. Nanoplastics were particularly effective at penetrating cells and disrupting normal astrocyte function. The findings suggest that plastic particle exposure may contribute to neuroinflammatory processes in the brain, warranting further investigation into potential neurotoxic effects.
Cytotoxicity and pro-inflammatory effect of polystyrene nano-plastic and micro-plastic on RAW264.7 cells.
Researchers found that polystyrene nano-plastics (80 nm) induced apoptosis and pro-inflammatory cytokine release in mouse macrophage RAW264.7 cells at lower concentrations than micro-plastics (3 μm), with nano-plastics also enhancing phagocytic activity and activating NF-kB signaling pathways more potently than their larger counterparts.
Effects of bisphenol A and nanoscale and microscale polystyrene plastic exposure on particle uptake and toxicity in human Caco-2 cells
Researchers studied how human intestinal Caco-2 cells take up polystyrene plastic particles of five different sizes ranging from 300 nanometers to 6 micrometers. The study found that smaller particles were taken up at higher rates and that co-exposure with bisphenol A increased cellular toxicity, suggesting that nanoscale plastics may pose a greater risk to human intestinal cells than larger microplastics.
Comparative evaluation of molecular mechanisms triggered by differently functionalized polystyrene nanoplastics in human colon cell lines
Researchers compared molecular mechanisms triggered by differently functionalized micro- and nanoplastics in human cells, assessing how surface chemistry affects cellular responses. Surface functionalization significantly altered the toxicity profile of particles, with some coatings increasing and others decreasing inflammatory and oxidative responses.
Nano-plastics and gastric health: Decoding the cytotoxic mechanisms of polystyrene nano-plastics size
Researchers examined how different sizes of polystyrene nanoplastics affect human stomach cells in the laboratory. They found that smaller nanoplastics were more readily taken up by the cells and caused greater damage, including increased oxidative stress and reduced cell survival. The study suggests that nanoplastic particle size plays a critical role in determining their potential impact on gastrointestinal health.
Internalization and cytotoxicity of polystyrene microplastics in human umbilical vein endothelial cells
Researchers investigated the uptake and toxicity of 1-micrometer polystyrene microplastics in human umbilical vein endothelial cells. The study found that interaction between the cells and microplastics was very low, with less than 4% of cells taking up particles even at high concentrations, and no significant inflammation, autophagy, or oxidative stress responses were observed at tested exposure levels.
Polystyrene micro- and nanoplastics in a colitis mouse model – effects on biodistribution, macrophage polarization, and gut microbiome
Researchers studied the effects of polystyrene micro- and nanoplastics in a mouse model of colitis, examining biodistribution, immune cell responses, and gut microbiome changes. The study found that nanosized particles in particular showed distinct biodistribution patterns and affected macrophage polarization under inflammatory conditions, suggesting that intestinal inflammation may alter how the body handles micro- and nanoplastic particles.
Quantification of Polystyrene Uptake by Different Cell Lines Using Fluorescence Microscopy and Label-Free Visualization of Intracellular Polystyrene Particles by Raman Microspectroscopic Imaging
Scientists tested how human cells take up polystyrene microplastic particles using three cell types that represent the lung lining, intestinal lining, and immune system. All three cell types absorbed the microplastic beads, with immune cells showing different uptake patterns compared to the barrier cells of the lungs and gut. This study confirms that microplastics can enter human cells through multiple exposure routes, including breathing and eating, and that immune cells may play a special role in processing these particles.
Size-dependent effects of polystyrene nanoplastics on autophagy response in human umbilical vein endothelial cells
Researchers studied how polystyrene nanoplastics of two different sizes affect human umbilical vein endothelial cells, focusing on a cellular cleanup process called autophagy. They found that smaller nanoplastics were taken up by cells more readily and caused greater disruption to autophagy function than larger particles. The study suggests that nanoplastic size is a critical factor in determining cardiovascular health risks, as these particles can impair the cells lining blood vessels.
Functionalized polystyrene nanoplastics induce distinct toxicity and transcriptomic changes in human intestinal Caco-2 cells
Researchers exposed human intestinal Caco-2 cells to polystyrene nanoplastics with different surface functionalizations (plain, aminated, carboxylated) and assessed cytotoxicity, cellular uptake, and transcriptomic responses. Surface chemistry strongly determined both uptake efficiency and the pattern of gene expression changes, with aminated particles inducing the most severe cytotoxic and inflammatory responses.
Polystyrene micro- and nanoplastics in a colitis mouse model – effects on biodistribution, macrophage polarization, and gut microbiome
Researchers induced colitis in mice using dextran sodium sulfate and orally administered polystyrene micro- and nanoplastics of three sizes, then tracked biodistribution, macrophage polarization, and gut microbiome changes. In colitis conditions, microplastic uptake into systemic tissues was enhanced, macrophages shifted toward a pro-inflammatory phenotype, and gut microbial diversity decreased, suggesting that inflammatory bowel disease increases vulnerability to microplastic-driven systemic harm.