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Polyvinyl Chloride and Polypropylene Model Nanoplastics Exhibit Distinct Interaction Patterns and Cellular Responses in Human Umbilical Vein Endothelial (HUVECs) Cells
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Scientists tested two common plastics, polypropylene (found in food containers) and PVC (found in pipes and packaging), on cells from the human umbilical vein to see how tiny plastic particles might affect blood vessels during pregnancy. They found that the two plastics damaged cells in different ways: polypropylene particles caused more cell stress and death, while PVC particles triggered a different cellular cleanup response. This suggests that not all microplastics are equally harmful, and the type of plastic matters when scientists study how these particles might affect pregnancy and vascular health.
Micro- and nanoplastics (MNPs) are increasingly detected in human tissues, yet their polymer-specific effects on endothelial cells remain poorly understood, particularly at the placental and fetal level. We compared cadmium selenide quantum dot-labelled polypropylene (PP) and polyvinyl chloride (PVC) model nanoplastics (NPs) in human umbilical vein endothelial cells (HUVECs) using particle characterization, MTT assays, flow cytometry, confocal microscopy, apoptosis analysis, and synchrotron nano-X-ray fluorescence imaging. PP nanoplastics caused an early reduction in metabolic activity, showed the strongest cell-associated fluorescence, and produced the greatest increase in membrane permeability and late apoptotic/necrotic populations. PVC nanoplastics displayed a more punctate distribution with greater overlap with membrane-associated regions and induced a stronger increase in LC3B-positive vesicular structures. Nano-XRF detected Cd-enriched signals associated with the labelled particles and a polymer-specific Cd–Cl spatial association in PVC-exposed cells. Sulfur mapping further revealed localized sulfur-poor regions along the cell periphery in exposed cells, suggesting localized remodeling of peripheral membranes. These findings indicate that PP and PVC NPs interact differently with endothelial cells and elicit distinct structural and functional responses. Polymer composition should therefore be considered when assessing the vascular and prenatal effects of MNP exposure.
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Beyond Polymer Identity: Biological and Health Implications of Polyvinyl Chloride Micro- and Nanoplastics
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This review summarizes existing research on tiny PVC plastic particles, which have been found in human blood, placenta and other tissues. Lab studies show these particles can harm cells and cause inflammation, but effects differ widely by particle type and study design, and no link to human disease has been established.
Toxicological Impacts of Polypropylene Nanoparticles Similar in Size to Nanoplastics in Plastic-Bottle Injections on Human Umbilical Vein Endothelial Cells
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Researchers tested the toxicity of polypropylene nanoparticles, similar in size to those found in plastic-bottle injections, on human umbilical vein endothelial cells. At concentrations equivalent to 20 times blood levels, the particles reduced cell viability, caused oxidative stress and inflammation, promoted cell death, and impaired wound healing. The findings raise concerns about the potential cardiovascular effects of nanoplastic exposure from medical products.
Influence of the polymer type on the impact of microplastic particles
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Researchers compared the cellular effects of polystyrene, polyethylene, PVC, and PLA microparticles on murine macrophages and epithelial cells, assessing uptake and cytotoxicity. All polymer types were ingested by macrophages, but the degree of cytotoxicity varied by polymer composition.
Polyamide and polyvinyl chloride microplastics induce cytotoxicity and cytokine release in primary normal human bronchial epithelial cells
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Scientists exposed lung cells from human airways to tiny plastic particles (from nylon and PVC, two common plastics) to see how they'd react, similar to what might happen when we breathe in airborne microplastics. The smallest particles caused cell damage and triggered inflammation-related signals, with PVC causing harm at lower doses than nylon—suggesting the type and size of plastic particles we inhale may matter for lung health. This is early-stage lab research, so more studies are needed to confirm what this means for people breathing in real-world air.
Cellular uptake, transport, and inflammatory responses of polyethylene terephthalate (PET) and polyvinyl chloride (PVC) nanoplastics in in vitro Caco-2 monoculture/mucus models.
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Lab models of human gut cells (Caco-2) were used to test two types of plastic nanoparticles, PET and PVC. Both entered cells similarly and did not harm cell survival, but PET moved through a mucus-coated model faster than PVC, and the two plastics triggered different inflammation-related signals (PVC raised IL-1β, PET raised TNF-α).
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