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Impact of Carboxylated Polystyrene Nanoplastics on some physiological and biochemical aspects of Artemia parthenogenetica
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Based on the limited information provided, this appears to be a conference presentation (not a full research paper) that studied how tiny plastic particles affected small sea creatures called Artemia. The researchers looked at whether these nanoplastics - plastic bits so small you need a microscope to see them - caused harm to the creatures' body functions. While this study focused on sea life, it could help us understand how the tiny plastic particles that are increasingly found in our food and water might affect living things.
Trabajo presentado en el 11º Congreso Ibérico, 8º Iberoamericano de Contaminación y Toxicología (CICTA 2018) celebrado en la Escuela Técnica Superior de Ingeniería de Montes, Forestal y del Medio Natural, Madrid del 11 al 13 de julio de 2018
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Researchers tracked short- and long-term effects of cationic polystyrene nanoplastics on brine shrimp Artemia, finding that even low concentrations impair growth, trigger cumulative oxidative stress leading to lipid peroxidation, inhibit neural and developmental enzymes including cholinesterase and carboxylesterase, and alter gene expression governing molting and cell protection.
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This laboratory study found that nanoplastic particles reduced growth and feeding rates in Artemia franciscana (brine shrimp) larvae in a dose-dependent manner. The results demonstrate that nanoplastics — the smallest and potentially most biologically active plastic particles — can harm early-life-stage marine crustaceans at environmentally relevant concentrations.
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Researchers exposed the zooplankton Artemia to amino-modified polystyrene nanoplastics and observed multiple adverse responses in their blood cell system. The nanoplastics triggered changes across five hemocyte subpopulations, causing cell death, oxidative stress, and altered immune function at environmentally relevant concentrations. The study suggests that nanoplastic pollution may compromise the innate immune defenses of small aquatic organisms at the base of the food chain.
Sublethal Effects of Polystyrene Nanoplastics on the Embryonic Development of Artemia salina (Linnaeus, 1758)
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Researchers exposed brine shrimp embryos to amino-modified polystyrene nanoplastics of two sizes and assessed a range of developmental effects. They found that the nanoplastics accumulated in the organisms and caused sublethal effects including altered hatching rates and developmental abnormalities, even at non-lethal concentrations. The study suggests that nanoplastic pollution may pose risks to the early development of organisms at the base of aquatic food chains.
Adverse effects of microplastics and oxidative stress-induced MAPK/Nrf2 pathway-mediated defense mechanisms in the marine copepod Paracyclopina nana
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Researchers studied how nano- and micro-sized polystyrene particles affect a tiny marine crustacean called a copepod at the molecular level. They found that the smallest particles caused the most severe oxidative stress and triggered cellular defense pathways, with effects worsening at higher concentrations. The study suggests that microplastics can disrupt the internal chemistry of marine organisms even at sizes too small to see with the naked eye.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.