We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Elucidating the effects of naturally weathered aged-polypropylene microplastics and newly procured polypropylene microplastics on raw 264.7 macrophages
AI summary Read the abstract
Researchers compared the effects of naturally weathered polypropylene microplastics and newly manufactured ones on immune cells called macrophages. They found that both types caused cell toxicity and disrupted normal cellular function, but the weathered particles had distinct effects due to their altered surface chemistry. The study suggests that aging and environmental weathering change how microplastics interact with biological systems.
In this work, we investigated weathered aged-PPMPs and naturally obtained polypropylene microplastics (NP-PPMPs) with raw 264.7 macrophages, which causes cytotoxicity and an imbalance in the intracellular system.
More Papers Like This
Impact of Degradation of Polyethylene Particles on Their Cytotoxicity
AI summary Read the abstract
Researchers found that degradation of polyethylene particles altered their cytotoxicity, with weathered and fragmented PE showing different toxic effects on cells compared to pristine particles, suggesting environmental aging changes microplastic health risks.
Pristine and artificially-aged polystyrene microplastic particles differ in regard to cellular response
AI summary Read the abstract
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.
Distinct cellular responses in liver macrophages to short- and long-term exposure to pristine and artificially aged polystyrene microplastic particles
AI summary Read the abstract
Scientists exposed liver immune cells to two types of microplastic, fresh plastic particles and ones "weathered" to mimic real-world environmental breakdown, to see how they'd react over both short and long periods. The weathered particles caused more immediate cell damage (stress, DNA harm) than fresh ones, and both types affected immune cell function differently the longer the exposure lasted. This matters because most lab studies only test pristine microplastics for a short time, but real-world plastic pollution is aged and long-lasting, meaning current research may be underestimating how microplastics actually affect our bodies over time.
New insights into the size-independent bioactive potential of pristine and UV-B aged polyethylene microplastics
AI summary Read the abstract
Scientists tested how UV light aging changes polyethylene microplastics and their effects on human immune cells (lymphocytes) from blood samples. Both new and UV-aged microplastics reduced cell viability and triggered DNA damage, regardless of particle size. This suggests that microplastics in the environment may harm human immune cells whether they are freshly produced or have been weathered by sunlight.
Polyethylene, whose surface has been modified by UV irradiation, induces cytotoxicity: A comparison with microplastics found in beaches
AI summary Read the abstract
Researchers showed that polyethylene microplastics degraded by UV light, mimicking what happens to plastics in the environment, were toxic to immune and skin cells in lab tests. Fresh, undegraded plastic particles did not cause the same harm, meaning weathered microplastics found in nature are likely more dangerous than the pristine plastics typically used in lab studies. This suggests that real-world human exposure to environmentally aged microplastics may carry greater health risks than current research indicates.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.