Ventura Emma, Gonçalves Joanna M, Vilke Juliano M, d'Errico Giuseppe, Benedetti Maura, Regoli Francesco, Bebianno Maria João
CIMA, Centre of Marine and Environmental Research\ARNET - Infrastructure Network in Aquatic Research, University of Algarve, Campus de Gambelas, 8000-139 Faro, Portugal; Dipartimento di Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy.
CIMA, Centre of Marine and Environmental Research\ARNET - Infrastructure Network in Aquatic Research, University of Algarve, Campus de Gambelas, 8000-139 Faro, Portugal.
Mar Pollut Bull. 2024 Sep;206:116697. doi: 10.1016/j.marpolbul.2024.116697. Epub 2024 Jul 17.
The abundance of micro (MPs) and nano (NPs) sized plastic particles in the ocean is concerning due to their harmful effects on marine life. The interactions between MPs and NPs in the marine environment and their impact on marine biota remain not fully understood. This study contributes with new insights into the interaction between polystyrene NPs (PSNPs) and polyethylene MPs (PEMPs) on the clam Ruditapes decussatus. Results showed ingestion of MPs and NPs by clams, with PSNPs demonstrating higher toxicity in hemolymph. While no genotoxicity was observed, clams treated with MPs and the mixture showed increased acetylcolinesterase (AchE) activity over time. Additionally, the antioxidant defense system mitigated oxidative stress, suggesting effective neutralization of reactive oxygen species. Hazard assessment indicated the greatest impact on clam digestive glands after ten days of exposure, with an antagonistic interaction between MPs and NPs noted.
海洋中大量存在的微塑料（MPs）和纳米塑料（NPs）因其对海洋生物的有害影响而令人担忧。MPs和NPs在海洋环境中的相互作用及其对海洋生物群的影响仍未完全了解。本研究为聚苯乙烯纳米塑料（PSNPs）和聚乙烯微塑料（PEMPs）对蛤仔（Ruditapes decussatus）的相互作用提供了新的见解。结果表明蛤仔摄入了MPs和NPs，PSNPs在血淋巴中表现出更高的毒性。虽然未观察到遗传毒性，但用MPs和混合物处理的蛤仔随着时间的推移乙酰胆碱酯酶（AchE）活性增加。此外，抗氧化防御系统减轻了氧化应激，表明对活性氧进行了有效中和。危害评估表明，暴露十天后对蛤仔消化腺的影响最大，同时注意到MPs和NPs之间存在拮抗作用。
