Cohen-Sánchez Amanda, Solomando Antònia, Pinya Samuel, Tejada Silvia, Valencia José María, Box Antonio, Sureda Antoni
Research Group in Community Nutrition and Oxidative Stress (NUCOX), University of Balearic Islands, 07122 Palma de Mallorca, Spain.
Interdisciplinary Ecology Group, Department of Biology, University of the Balearic Islands, 07122 Palma de Mallorca, Spain.
Toxics. 2023 Apr 11;11(4):365. doi: 10.3390/toxics11040365.
Plastic pollution in the oceans is a growing problem, with negative effects on exposed species and ecosystems. L. is a very important fish species both culturally and economically in the Balearic Islands. The aim of the present study was to detect and categorise the presence of microplastics (MPs) in the digestive tract of , as well as the existence of oxidative stress in the liver. For this purpose, the fish were categorised into two groups based on the number of MPs observed in the digestive tracts: a group with no or low presence of MPs (0-3 items) and a group with a higher presence of MPs (4-28 items). MPs were found in 89% of the specimens analysed, with a dominance of fibre type and blue colour. Regarding the type of polymer, polycarbonate was the most abundant, followed by polypropylene and polyethylene. For the group with a greater presence of MPs, the activities of the antioxidant enzymes glutathione peroxidase and glutathione reductase, as well as the phase II detoxification enzyme glutathione s-transferase, were higher than the activities observed in fish with little to no presence of MPs. The activities of catalase and superoxide dismutase and the levels of malondialdehyde did not show significant differences between both groups. In conclusion, these results demonstrate the presence of MPs in the digestive tract of and the existence of an antioxidant and detoxification response, mainly based on the glutathione-based enzymes.
海洋中的塑料污染问题日益严重，对接触到的物种和生态系统产生负面影响。在巴利阿里群岛，[鱼的名称]在文化和经济方面都是非常重要的鱼类物种。本研究的目的是检测并分类[鱼的名称]消化道中微塑料（MPs）的存在情况，以及肝脏中氧化应激的存在情况。为此，根据在消化道中观察到的 MPs 数量将鱼分为两组：一组 MPs 不存在或含量低（0 - 3 个），另一组 MPs 含量较高（4 - 28 个）。在 89%的分析样本中发现了 MPs，其中纤维类型和蓝色占主导。关于聚合物类型，聚碳酸酯最为丰富，其次是聚丙烯和聚乙烯。对于 MPs 含量较高的组，抗氧化酶谷胱甘肽过氧化物酶和谷胱甘肽还原酶以及 II 期解毒酶谷胱甘肽 S - 转移酶的活性高于 MPs 几乎不存在或不存在的鱼中观察到的活性。过氧化氢酶和超氧化物歧化酶的活性以及丙二醛水平在两组之间没有显著差异。总之，这些结果证明了[鱼的名称]消化道中存在 MPs，以及存在主要基于谷胱甘肽相关酶的抗氧化和解毒反应。
