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61,005 resultsShowing papers similar to Effects of Pollutants on the Endocrine System of Tadpoles
ClearDevelopmental Abnormalities in Tadpoles as Biomarkers to Assess the Ecotoxicity of Traditional and Emerging Pollutants
This review examines how developing tadpoles can serve as sensitive indicators of toxic contamination in aquatic environments, noting that micro- and nanoplastics are among the emerging pollutants shown to cause developmental abnormalities in amphibian larvae. Because amphibians absorb chemicals easily through their permeable skin, they serve as early warning systems for plastic pollution levels that may also threaten other wildlife and ecosystems.
Role of Environmental Pollution in Altering Reproductive Cycles in Freshwater Fishes
Not relevant to microplastics — this review examines how industrial chemicals, pharmaceuticals, heavy metals, and pesticides in freshwater ecosystems disrupt reproductive cycles in fish, covering hormonal imbalances and population effects from endocrine-disrupting chemicals broadly.
Toxicological implications of emerging pollutants on aquatic organisms
Researchers reviewed how a broad range of emerging pollutants — including microplastics, pharmaceuticals, pesticides, and heavy metals — harm aquatic organisms like fish, amphibians, and molluscs. Evidence shows these pollutants trigger oxidative stress, disrupt hormones, impair reproduction, and reduce biodiversity, with the review calling for stronger regulations, better wastewater treatment, and more research on the combined effects of multiple pollutants.
Impact of Aquatic Pollution on Embryonic and Larval Development in Fish: A Comprehensive Review
This review examines how aquatic pollutants—heavy metals, pesticides, and microplastics—affect the embryonic and larval development of fish, detailing mechanisms of toxicity including disrupted organ formation, hormonal interference, and altered enzyme activity. The paper frames fish as early warning indicators of contamination given their sensitivity during development.
Ecotoxicological perspectives of microplastic pollution in amphibians
This review summarizes research on how microplastics affect amphibians, which are considered important indicator species for freshwater pollution. Researchers found evidence that microplastics can impair amphibian growth, immune function, and gene expression, with effects varying by species and particle characteristics. The findings raise concerns about the vulnerability of amphibian populations already threatened by habitat loss and other environmental stressors.
The effect of environmental stressors on growth in fish and its endocrine control
This review examines how environmental stressors, including pollution and climate change, affect fish growth through hormonal disruption. Pollutants like microplastics and heavy metals can interfere with the growth hormone system, leading to stunted development and reproductive problems in fish. These effects on fish health are relevant to humans because they can reduce the quality and safety of fish as a food source.
Microplastics as an emerging threat to amphibians: Current status and future perspectives
This review summarizes existing research on microplastic contamination in amphibians like frogs and salamanders, finding that over 80% of studied species had accumulated microplastics. The particles persisted in organs, showed toxic and gene-damaging effects, and could transfer through the food chain. Since amphibians are indicators of environmental health, widespread microplastic accumulation in these animals signals broader ecosystem contamination that can ultimately affect human food and water sources.
The Impact of Endocrine Disruptions on Animal and Human Organism
This review examines how endocrine-disrupting chemicals, including bisphenol A, phthalates, and micro- and nanoplastics, interfere with hormonal balance in animals and humans. Researchers describe how these substances interact with hormone receptors, induce epigenetic changes, and disrupt cell signaling pathways affecting reproduction, metabolism, and neurological function. The study highlights that nanoparticles, including microplastics, may amplify endocrine disruption and calls for more research into the molecular pathways involved.
Editorial: Endocrine disruption in marine species: unraveling pollution and climate change effects
This editorial introduces research on how microplastics, heavy metals, and climate-driven stressors like ocean warming disrupt hormonal function in marine animals. These endocrine disruptions can affect reproduction, behavior, and survival, with broader consequences for marine food webs.
The impact of chemical pollution across major life transitions: a meta-analysis on oxidative stress in amphibians
This meta-analysis of 86 studies found that chemical pollutants trigger different oxidative stress responses across amphibian life stages: embryos and larvae activate antioxidant defenses without showing oxidative damage, while adults exhibit both increased reactive oxygen species and antioxidant activation. The findings suggest that metamorphosis fundamentally changes how organisms respond to environmental contaminants, which is relevant to understanding how microplastics and their associated chemicals affect wildlife at different developmental stages.
Combined effect and mechanism of microplastic with different particle sizes and levofloxacin on developing Rana nigromaculata: Insights from thyroid axis regulation and immune system
Researchers exposed developing frogs to a combination of microplastics of different sizes and the antibiotic levofloxacin at environmentally relevant levels. They found that the combination disrupted thyroid hormone regulation and immune system function more severely than either pollutant alone. The study suggests that microplastics and pharmaceutical contaminants together may pose compounding risks to amphibian development and health.
Influence of polystyrene nanoplastics on the toxicity of haloperidol to amphibians: An in vivo and in vitro approach
Researchers investigated whether polystyrene nanoplastics change the toxicity of haloperidol, a pharmaceutical commonly found in waterways, to two species of amphibian tadpoles. They found that nanoplastics altered the drug's effects in complex ways, sometimes increasing and sometimes decreasing toxicity depending on the concentration and biological endpoint measured. The study highlights the unpredictable nature of combined pollutant exposures for amphibians already facing global population declines.
Microplastics impair amphibian survival, body condition and function
Tadpoles of the common midwife toad were exposed to polystyrene microspheres at varying concentrations in microcosms, with microplastics reducing feeding, impairing body condition, and showing dose-dependent ingestion of particles. The study provides rare evidence that microplastics harm amphibians, a group already facing global population declines.
Threats of nano/microplastics to reproduction and offspring: Potential mechanisms and perspectives
This review summarized the evidence on how nano- and microplastics threaten reproduction and offspring health across multiple species, including fish, invertebrates, and mammals. The authors outlined potential mechanisms by which these plastic particles disrupt endocrine function, gonadal development, and embryonic development.
Individual and combined effects of microplastics and diphenyl phthalate as plastic additives on male goldfish: A biochemical and physiological investigation
Male goldfish exposed to both microplastics and the plasticizer chemical DPP (diphenyl phthalate) together showed significant liver damage, disrupted fat and sugar metabolism, and hormonal imbalances including decreased testosterone and increased estrogen. The combined exposure was more harmful than either pollutant alone, demonstrating how microplastics and their chemical additives can work together to disrupt the endocrine system.
Effects of pollution on freshwater aquatic organisms
This annual review of scientific literature covers 2018 research on the effects of various pollutants on freshwater aquatic organisms, including microplastics, pesticides, pharmaceuticals, and heavy metals. The review highlights the growing body of evidence that multiple freshwater pollutants impair the health, reproduction, and behavior of aquatic species.
How much are microplastics harmful to the health of amphibians? A study with pristine polyethylene microplastics and Physalaemus cuvieri
Researchers exposed frog tadpoles (Physalaemus cuvieri) to polyethylene microplastics and found significant harmful effects including DNA damage, cell toxicity, and abnormal physical development. The microplastics accumulated in multiple tissues including the gills, gut, liver, muscle, and blood. The study provides some of the first evidence that microplastics can affect amphibian health, adding to concerns about their impact on freshwater wildlife.
Microplastics as Emerging Contaminants: Investigating their Potential to Alter Human Metabolic and Endocrine Systems
This review investigated the potential of microplastics to alter human hormone signaling, synthesizing evidence that plastic particles and their chemical additives can act as endocrine disruptors at environmentally relevant concentrations. The paper highlighted reproductive and metabolic pathways as areas of particular concern.
Effects of Dietary Exposure to Polystyrene Microplastics on the Thyroid Gland in Xenopus laevis
Using the Amphibian Metamorphosis Assay, researchers fed Xenopus laevis tadpoles polystyrene microplastics (50 and 500 µg/L) via diet for 21 days and assessed thyroid gland histology. Microplastic exposure significantly affected larval body length and caused thyroid gland histological changes, suggesting disruption of the hypothalamic-pituitary-thyroid axis.
Impacts and transport of microplastics: Population dynamics in frogs and the transfer between aquatic and terrestrial ecosystems
Researchers studied how microplastics affect the development and survival of Japanese tree frogs and how frogs may transport plastics from water to land. They found that microplastic exposure did not significantly alter hatching or survival rates but did affect growth patterns. The study also demonstrates that as frogs metamorphose and move onto land, they carry ingested microplastics with them, creating a previously underappreciated pathway for plastic pollution to spread between ecosystems.
Toxicity of per- and polyfluoroalkyl substances to aquatic vertebrates
This review examines the toxic effects of per- and polyfluoroalkyl substances (PFAS) on fish, amphibians, and other aquatic vertebrates. Researchers found that PFAS exposure can disrupt hormone systems, damage liver and reproductive tissues, and impair development across multiple species. The study highlights the widespread nature of PFAS contamination in aquatic environments and the need for stricter regulation of these persistent chemicals.
A review of the endocrine disrupting effects of micro and nano plastic and their associated chemicals in mammals
This review summarizes how micro- and nanoplastics carry hormone-disrupting chemicals that can interfere with the thyroid, reproductive organs, and other parts of the endocrine system in mammals. Because these chemicals are not tightly bound to the plastic, they can leach into milk, water, and food, potentially disrupting hormone function in humans who consume them.
Microplastics pollution in larvae of toads, frogs and newts in anthropopressure gradient
Researchers examined microplastic contamination in the larvae of toads, frogs, and newts across sites with varying levels of human activity in Poland. They found microplastics in larvae at all locations, with higher concentrations near urban and agricultural areas compared to natural habitats. The study raises concerns about how microplastic exposure during sensitive developmental stages may affect already-declining amphibian populations.
Efeitos da exposição a microplásticos e nanoplásticos no sistema endócrino: uma revisão de literatura
This Portuguese-language literature review examined evidence from animal model studies on how microplastic and nanoplastic contamination affects the endocrine system, synthesizing findings from PubMed, LILACS, and SciELO databases. Studies documented adverse effects in the brain, intestine, testes, and placenta, with growing concern about endocrine disruption from widespread human exposure.