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Microplastic exposure induces preeclampsia-like symptoms via HIF-1α/TFRC-mediated ferroptosis in placental trophoblast cells
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Researchers exposed pregnant rats to polystyrene microplastics and found that the particles induced symptoms resembling preeclampsia, including elevated blood pressure and increased protein in urine. The microplastics triggered a type of cell death called ferroptosis in placental cells by activating a specific signaling pathway that led to iron overload and oxidative damage. The study identifies microplastic-induced placental cell death as a potential mechanism linking environmental plastic exposure to pregnancy complications.
Microplastic (MP) pollution is an emerging environmental concern with potential health risks, yet its impact on pregnancy remains largely unexplored. This study investigated the effects of polystyrene microplastic (PS-MP) exposure on placental function and its role in preeclampsia (PE) pathogenesis. Pregnant rats were exposed to PS-MP, which induced PE-like symptoms including elevated blood pressure, increased proteinuria, and altered expression of angiogenic factors. Transcriptomic and molecular analyses revealed PS-MP triggered ferroptosis in placental trophoblast cells by activating the HIF-1α/TFRC axis, resulting in iron overload and oxidative stress. PS-MP exposure impaired trophoblast migration, invasion, and angiogenesis; these effects were ameliorated by ferroptosis inhibition. These findings identified PS-MP-induced ferroptosis as a critical mechanism underlying placental dysfunction, highlighting PS-MP as a potential environmental risk factor for PE. Understanding the impact of MP on pregnancy provides crucial insights into their reproductive toxicity and underscores the need for further research on mitigating their effects.
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Polystyrene Nanoplastics induced placental toxicology by activating Keap1-mediated ferroptosis via METTL3-dependent m6A methylation
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Scientists found that tiny plastic particles called nanoplastics can damage the placenta during pregnancy by triggering a harmful process called ferroptosis, which kills cells through iron buildup. The study used lab cells and pregnant mice to show how these plastic particles disrupt the body's natural protective systems in placental tissue. This research helps explain why microplastics in our environment might pose risks during pregnancy, though more studies are needed to understand the full impact on human health.
Polystyrene nanoplastics impair placental function and promote embryo resorption through ROS-mediated ferroptosis-related injury.
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In a study on pregnant mice and human placental cells, tiny plastic particles called nanoplastics (the kind that break down from everyday plastic waste) crossed the placenta, damaged its cells, and triggered a harmful type of cell death caused by oxidative stress—ultimately leading to more pregnancy loss in the mice. While this research was done in animals and lab-grown cells rather than in humans, it raises real concerns about how the microplastics we're increasingly exposed to might affect pregnancy health, and points to specific biological pathways that future treatments or protective strategies could target.
Gestational exposure to nanoplastics disrupts fetal development by promoting the placental aging via ferroptosis of syncytiotrophoblast
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This mouse study found that exposure to nanoplastics during pregnancy caused placental aging and fetal growth restriction through a process called ferroptosis -- a type of iron-dependent cell death -- in the cells that form the barrier between mother and baby. When researchers blocked the ferroptosis process, fetal weight improved, suggesting this pathway could be a target for protecting pregnancies from nanoplastic-related harm.
Polystyrene nanoparticles induced adverse pregnancy outcomes via the activation of placental ferroptosis and gut microbiota dysfunction
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Researchers exposed pregnant mice to 50-nanometer polystyrene nanoparticles and found that the particles caused adverse pregnancy outcomes through two interconnected mechanisms: disruption of gut microbiota and activation of ferroptosis in placental tissue. The nanoparticle exposure altered the composition of beneficial gut bacteria and triggered iron-dependent cell death in the placenta. The study suggests that maternal exposure to nanoplastics during pregnancy may threaten reproductive health through gut-placenta axis disruption.
Chronic exposure to polystyrene microplastics induces renal fibrosis via ferroptosis
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Mice exposed to polystyrene microplastics in their drinking water for six months developed kidney scarring (fibrosis) driven by a type of cell death called ferroptosis. The microplastics triggered iron-dependent damage in kidney cells, which then released signals causing surrounding tissue to scar over. This long-term study reveals a new mechanism by which chronic microplastic exposure could lead to progressive kidney disease in humans.
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