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Bioinspired zinc-doped carbon dots protect against polystyrene microplastic-induced spermatogenic dysfunction through Nrf2 activation and cuproptosis suppression
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Scientists tested a specially engineered nanoparticle in animals and found it helped protect sperm-producing cells from damage caused by microplastics, likely by reducing harmful cell stress and a newly discovered type of cell death linked to copper. While this is early stage research, not yet tested in humans, it points to a possible future treatment for fertility problems tied to plastic pollution exposure.
findings. Collectively, ZnTFZCDs represent a bio-inspired nanoplatform that attenuates PS-MPs-induced male reproductive injury through coordinated modulation of redox and copper homeostasis, offering a new therapeutic strategy for environmental pollutant-related reproductive disorders by targeting the previously overlooked cuproptosis pathway.
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Protective effect of Cordycepin on blood-testis barrier against pre-puberty polystyrene nanoplastics exposure in male rats
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Young male rats exposed to polystyrene nanoplastics during a critical growth period developed lasting damage to their reproductive system, including lower sperm quality and weakened barriers protecting developing sperm cells. A natural compound called cordycepin partially reversed this damage by reducing inflammation and oxidative stress, suggesting possible protective strategies against reproductive harm from plastic pollution.
Nrf2-mediated ferroptosis of spermatogenic cells involved in male reproductive toxicity induced by polystyrene nanoplastics in mice
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When polystyrene nanoplastics were injected into the bloodstream of mice, they accumulated in the testes and caused significant damage to sperm-producing cells through a process called ferroptosis, a type of iron-dependent cell death. The nanoplastics disrupted a key protective pathway (Nrf2) that normally prevents this type of cell death. These findings suggest that nanoplastic exposure could harm male fertility by directly damaging the cells responsible for producing sperm.
Anti-oxidant and anti-apoptotic effects of royal jelly against polystyrene microplastic-induced testicular injury in mice.
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Royal jelly — a natural bee product — protected mouse testes from damage caused by polystyrene microplastic exposure by boosting antioxidant defenses and reducing programmed cell death. This points to potential protective nutritional strategies against reproductive harm from microplastic ingestion, though results in mice need to be verified before drawing conclusions about human health.
Determination of Biological and Molecular Attributes Related to Polystyrene Microplastic-Induced Reproductive Toxicity and Its Reversibility in Male Mice
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Researchers exposed male mice to polystyrene microplastics through drinking water and found that the particles caused mitochondrial damage in testicular tissue, including reduced membrane potential and disrupted energy production. This mitochondrial dysfunction led to decreased sperm quality, likely driven by oxidative stress. Importantly, the study found that sperm quality recovered after one to two spermatogenic cycles without further exposure, suggesting that reproductive toxicity from microplastics may be reversible.
Combined effect of polystyrene microplastics and cadmium on rat blood-testis barrier integrity and sperm quality
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Researchers exposed male rats to polystyrene microplastics and cadmium, both separately and together, and found that both substances damaged testicular tissue, disrupted the blood-testis barrier, and reduced sperm quality. Notably, the combined exposure was less severe than cadmium alone, likely because microplastics absorbed some cadmium in the gut and reduced its bioavailability. The study also found for the first time that microplastics trigger autophagy in reproductive cells as a protective response.
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