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Polystyrene nanoplastic exposure actives ferroptosis by oxidative stress-induced lipid peroxidation in porcine oocytes during maturation
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Researchers found that polystyrene nanoplastics trigger ferroptosis — a form of iron-dependent cell death driven by fat oxidation — in pig egg cells, disrupting their maturation and reproductive viability. This finding raises concerns about nanoplastic exposure potentially impairing fertility by damaging the eggs needed for reproduction.
In conclusion, PS-NPs caused ferroptosis in porcine oocytes by increasing oxidative stress and altering lipid metabolism, leading to the failure of oocyte maturation.
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Researchers exposed pig egg cells to polystyrene nanoplastics during laboratory maturation and found that while the eggs still completed their basic development stages, the nanoplastics significantly increased harmful reactive oxygen species levels. This oxidative stress reduced the quality of resulting embryos, as indicated by fewer cells per embryo, suggesting nanoplastic exposure could be a concern for reproductive health.
Ferroptosis: First evidence in premature duck ovary induced by polyvinyl chloride microplastics
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Researchers discovered that polyvinyl chloride microplastics caused premature ovarian damage in ducks through a cell death process called ferroptosis, which involves iron-dependent oxidative damage. Higher microplastic concentrations led to iron accumulation, increased oxidative stress, and structural damage to ovarian tissue. This is the first evidence linking microplastic exposure to ferroptosis in the avian reproductive system.
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In a 90-day study, female rats exposed to polystyrene microplastics had fewer healthy ovarian follicles, increased oxidative damage, and elevated inflammation in their ovaries. The microplastics triggered a type of inflammatory cell death called pyroptosis in the cells surrounding eggs, along with increased programmed cell death. These findings suggest that microplastic exposure could harm female fertility by damaging the ovaries and the cells needed for healthy egg development.
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