Environmentally relevant concentrations of microplastics influence the locomotor activity of aquatic biota

Sun, Tao; Zhan, Junfei; Li, Fei; Ji, Chenglong; Wu, Huifeng

doi:10.1016/j.jhazmat.2021.125581

Cited by 56 publications

(16 citation statements)

References 108 publications

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Section: Resultsmentioning

confidence: 99%

“…33 Our exposure concentration is in the same magnitude of environmentally relevant concentrations as the maximum concentrations of MPs reported in multiple field investigations around 1.0 mg L −1 as surveyed in this literature. 34 After different exposure or depuration times, the bivalves were dissected and the number of NPs in six main organs was measured by SERS and ICP-MS (Fig. 3A).…”

Section: Ingestion and Accumulation Of Nps In Bivalvesmentioning

confidence: 99%

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Quantitative assessment of in vivo distribution of nanoplastics in bivalve Ruditapes philippinarum using reliable SERS tag-labeled nanoplastic models

Wang

Zhang

et al. 2022

Nanoscale

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Section: Resultsmentioning

confidence: 99%

Section: Ingestion and Accumulation Of Nps In Bivalvesmentioning

confidence: 99%

Quantitative assessment of in vivo distribution of nanoplastics in bivalve Ruditapes philippinarum using reliable SERS tag-labeled nanoplastic models

Wang

Zhang

et al. 2022

Nanoscale

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“…Here, the median moved distance increased as a function of concentration, suggesting hyperactivity. Sun et al (2021) recently published the results of a meta-analysis on locomotor data of aquatic biota exposed to environmentally measured MP concentrations and included physically- and chemically-mediated ( i.e ., based on the particulate matter of the pollutant or its intrinsic properties) MP impacts. They outlined a decrease in the average speed and moved distance by 5% and 8%, respectively.…”

Section: Discussionmentioning

confidence: 99%

“…We applied similar test variables in terms of acclimatization period ( Chen et al, 2020 ; Wang et al, 2020 ), recording time ( Wang et al, 2020 ) and replicate number per treatment as other studies ( Gerhardt, 2020 ; Xu et al, 2020 ). It is noteworthy that the test variables for the assessment of the swimming activity can vary greatly ( Faimali et al, 2017 ; Siregar et al, 2021 ; Sun et al, 2021 ). Since we have analyzed several recording lengths in a preliminary study and detected no differences between the groups ( Fig.…”

Section: Discussionmentioning

confidence: 99%

“…Related studies have worked though with marine ( Langlet et al, 2020 ) and intertidal animals ( Seuront, 2018 ; Seuront et al, 2021 ). Sun et al (2021) analyzed both physically- and chemically-mediated effects of microplastics (MPs) on the locomotor activity of aquatic organisms and reported a significant decrease in movements at environmentally measured MP (≤1 mg L −1 ) concentrations.…”

Section: Introductionmentioning

confidence: 99%

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Locomotor behavior of Neocaridina palmata: a study with leachates from UV-weathered microplastics

Klein¹,

Heß²,

Schulte‐Oehlmann³

et al. 2021

PeerJ

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Weathering of plastics leads to the formation of increasingly smaller particles with the release of chemical compounds. The latter occurs with currently unknown environmental impacts. Leachate-induced effects of weathered microplastics (MPs) are therefore of increasing concern. To investigate the toxicity of the chemical mixtures from such plastics, we exposed the freshwater shrimp Neocaridina palmata to enriched leachates from unweathered and artificially weathered (UV-A/B light) MPs (≤1 mm) from recycled low-density polyethylene (LDPE-R) pellets and from a biodegradable, not fully bio-based starch blend (SB) foil. We analyzed the individual locomotor activity (moved distance and frozen events) on day 1, 3, 7 and 14 of exposure to five leachate concentrations equivalent to 0.40–15.6 g MPs L−1, representing the upper scale of MPs that have been found in the environment. The median moved distance did not change as a function of concentration, except for the unweathered SB treatment on day 14 that indicated hyperactivity with increasing concentrations. Significant impacts were solely detected for few concentrations and exposure days. Generally, no consistent trend was observed across the experiments. We further assessed the baseline toxicity of the samples in the Microtox assay and detected high bioluminescence inhibitions of the bacterium Aliivibrio fischeri. This study demonstrates that neither the recycled nor the biodegradable material are without impacts on test parameters and therefore cannot be seen as safe alternative for conventional plastics regarding the toxicity. However, the observed in vitro toxicity did not result in substantial effects on the behavior of shrimps. Overall, we assume that the two endpoints examined in the atyid shrimp N. palmata were not sensitive to chemicals leaching from plastics or that effects on the in vivo level affect other toxic endpoints which were not considered in this study.

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Polystyrene microplastics induce autophagy and apoptosis in birds lungs via PTEN/PI3K/AKT/mTOR

Yin

et al. 2022

Environmental Toxicology

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Microplastics (MPs) seriously pollute and potentially threaten human health. Birds are sentinels of environmental pollutants, which respond quickly to contamination events and reveal current environmental exposure. Therefore, birds are good bioindicators for monitoring environmental pollutants. However, the mechanism of lung injury in birds and the role of the PTEN/PI3K/AKT axis are unknown. In this study, broilers treated with different polystyrene microplastics (PS‐MPs) (0, 1, 10, and 100 mg/L) were exposed to drinking water for 6 weeks to analyze the effect of PS‐MPs on lung injury of broilers. The results showed that with the increase of PS‐MPs concentration, malonaldehyde (MDA) content increased, and catalase (CAT) and glutathione (GSH) activity decreased, further leading to oxidative stress. PS‐MPs caused the PI3K/Akt/mTOR pathway to be inhibited by phosphorylation, and autophagy accelerated formation (LC3) and degradation (p62), causing autophagy. In PS‐MPs exposed lung tissues, the expression of Bax/Bcl‐2 and Caspase family increased, and MAPK signaling pathways (p38, ERK, and JNK) showed an increase in phosphorylation level, thus leading to cell apoptosis. Our research showed that PS‐MPs could activate the antioxidant system. The antioxidant system unbalance‐regulated Caspase family, and PTEN/PI3K/AKT pathways initiated apoptosis and autophagy, which in turn led to lung tissue damage in chickens. These results are of great significance to the toxicological study of PS‐MPs and the protection of the ecosystem.

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Environmentally relevant concentrations of microplastics influence the locomotor activity of aquatic biota

Cited by 56 publications

References 108 publications

Quantitative assessment of in vivo distribution of nanoplastics in bivalve Ruditapes philippinarum using reliable SERS tag-labeled nanoplastic models

Quantitative assessment of in vivo distribution of nanoplastics in bivalve Ruditapes philippinarum using reliable SERS tag-labeled nanoplastic models

Locomotor behavior of Neocaridina palmata: a study with leachates from UV-weathered microplastics

Polystyrene microplastics induce autophagy and apoptosis in birds lungs via PTEN/PI3K/AKT/mTOR

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