Microplastics exposure causes oxidative stress and microbiota dysbiosis in planarian Dugesia japonica

Han, Ya-Peng; Zhang, Xiaoxia; Liu, Pengfei; Xu, Sheng; Chen, Delai; Liu, Jian Ning

doi:10.1007/s11356-022-18547-x

Cited by 27 publications

(11 citation statements)

References 69 publications

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“…Previous studies have shown that MP exposure affected planarian microbiota richness with a significant increase in Simpson and Shannon indexes (Han et al, 2022) and marine medaka microbiota with a decrease in Shannon and Chao 1 index (Zhang et al, 2023). In our study, however, effects in E. affinis microbiota after MP exposure seem to be more subtle, with only a significant difference in the Chao 1 index between the control and the treatment of weathered PBAT during the second generation observed.…”

Section: Main Effectscontrasting

confidence: 78%

“…In our study, however, effects in E. affinis microbiota after MP exposure seem to be more subtle, with only a significant difference in the Chao 1 index between the control and the treatment of weathered PBAT during the second generation observed. Possible explanations could come from the fact that studies by Han et al (2022) and Zhang et al (2023) focused specifically on gut microbiota, which is considered more sensitive to pollutants as compared with external microbiota (Fackelmann and Sommer, 2019). Indeed, in our study, due to the small size of E. affinis and the lack of protocols for gut isolation, total DNA was extracted from each sample.…”

Section: Main Effectsmentioning

confidence: 94%

“…Most existing studies were focused on the specific relationship between copepods and Vibrio sp. (Heidelberg et al, 2002;Huq et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

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Multigenerational exposure of microplastics on the microbiota of E. affinis (copepod): a comparative study between biodegradable and nonbiodegradable microplastics

Thery,

Li,

Das

et al. 2023

Front. Ecol. Evol.

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The accumulation of plastic debris around the world, especially in marine environments, has been well documented during the past decades. Recent studies have found that inorganic surfaces of microplastics (MPs) can be used by microorganisms as living substrates and form an ecosystem named “plastisphere.” Some microorganisms present in MPs are capable of producing polymer-degrading enzymes. In addition, MPs can also serve as vectors and carry microorganisms (including potential pathogens) into higher trophic levels through their ingestion by animals. In this study, impacts on copepod microbiota during chronic exposure to MPs were investigated by exposing copepods to a classic single-use polymer (low-density polyethylene (LDPE)) and a biodegradable polymer (polybutylene adipate terephthalate (PBAT)). Copepods were exposed to “virgin” and “weathered” MPs during four generations at an environmentally relevant concentration of 300 µg/L, followed by one “detoxification” generation without MP exposition. Impacts of MP exposure on copepod microbiota were investigated using 16S rRNA gene high-throughput sequencing. The result of nonmetric multidimensional scaling (NMDS) analysis showed that copepods (with or without MP exposure) carried distinguishable microbiota as compared with the microbiota of water and microalgae used for maintaining copepods. According to the results of permutational analysis of variance (PERMANOVA), the microbiota of MP-exposed (both PBAT and LDPE) copepods was significantly different from the microbiota of unexposed copepods during generations one to four. After “detoxification,” however, no significant difference in microbiota composition was observed among all generation five copepods. Altogether, impacts on copepod microbiota of MP exposure for multiple generations were observed, despite plastic origin (biodegradable or not) and aging conditions. Furthermore, copepod microbiota seemed to return to their original structure as soon as the MP exposure stopped.

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Section: Main Effectscontrasting

confidence: 78%

Section: Main Effectsmentioning

confidence: 94%

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Multigenerational exposure of microplastics on the microbiota of E. affinis (copepod): a comparative study between biodegradable and nonbiodegradable microplastics

Thery,

Li,

Das

et al. 2023

Front. Ecol. Evol.

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“…Each marker plays a role within this system, CAT converts hydrogen peroxide into H 2 O and O 2 (Regoli and Giuliani 2014) and MDA is one of the by-products of lipid peroxidation (Esterbauer et al 1991). Currently, the study of enzymatic alterations has increasingly been applied in research with MP as indicators of cell damage (Han et al 2022).…”

Section: Biomarkers Of Oxidative Stressmentioning

confidence: 99%

Biological responses of Chironomus sancticaroli to exposure to naturally aged PP microplastics under realistic concentrations

et al. 2023

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Microplastic (MP) is yet another form of chronic anthropogenic contribution to the environment. MP are plastic particles (< 5 mm) that have been widely found in the most diverse natural environments, but their real impacts on ecosystems are still under investigation. Here, we studied the toxicity of naturally aged secondary polypropylene (PP) MP after constant exposure to ultraviolet radiation (26 µm) to larvae of Chironomus sancticaroli, a dipteran species. The concentrations tested were 13.5; 67.5; and 135 items.g -1 of dry sediment. C. sancticaroli organisms were investigated for fragment ingestion, mortality and changes in enzymatic biomarkers after 144 hours of exposure. The organisms were able to ingest MP from the rst 48 hours, and the amount of items internalized was dose-dependent and time-dependent. Overall, the results show that mortality was low, being signi cant at the lowest and highest concentrations (13.5 and 135 items.g -1 ). Regarding changes in enzyme markers, after 144 hours MDA and CAT activities were both signi cantly altered (increased and reduced, respectively), while SOD and GST levels were unchanged. In the present study, naturally aged polypropylene MP induced biochemical toxicity in C. sancticaroli larvae, with toxicity being higher according to exposure time and particle concentration.

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“…To date, 76% of studies emphasize on smaller particles (microplastics, MP) with observational field studies as well as laboratory experiments (Blettler et al, 2018). In this regard, studies have highlighted that smaller plastics (MP) may harm biota and human health, causing chronic inflammation, cytotoxicity, developmental problems, toxicological threats, oxidative stress, and immune, endocrinal, and neurodegenerative diseases (Campanale et al, 2020;Naqash et al, 2020;Prata et al, 2020;Kukkola et al, 2021;Pironti et al, 2021;Buwono et al, 2022;Han et al, 2022). However, given these issues, the most important thing is to understand the origin of MP.…”

Section: Introductionmentioning

confidence: 99%

Riverine macroplastic gradient along watercourses: A global overview

Gallitelli

Scalici

2022

Front. Environ. Sci.

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Nowadays, plastics represent growing concern in aquatic habitats, harming more and more both ecosystem and human health. Since rivers are the main carriers of plastics to the sea, some studies were conducted on the transport of overall small plastics, but observations on big plastics (i.e., macroplastics) in rivers are poorly reported in the literature. Although most studies focused on plastic transport in the lower part of the rivers, research on the upper and middle zones are completely lacking. In this regard, this could influence the transport of plastics to the sea, with insights into the source and origin of macroplastics. Here, we aimed at overviewing macroplastic distribution along rivers, emphasizing on the global riverine plastic hotspot areas. First, 1) we analyzed and discussed the bibliometric analysis on macroplastics in rivers providing a framework for plastic pollution management. second, 2) we provided geographical insights into macroplastics by mapping global riverine plastic hotspot areas. Then, 3) we analyzed the main factors affecting macroplastic distribution and accumulation in rivers. Furthermore, 4) we assessed crucial gaps in riverine macroplastic accumulation, highlighting the importance of a plastic gradient in the horizontal transport along the entire river course (i.e., three river zones). Then, 5) we highlighted the lack of standardization regarding macroplastic size, concentration, and polymers that does not allow valuable comparisons among studies. At the end, 6) we concluded by providing future perspectives and conclusions on macroplastic distribution and accumulation in rivers worldwide. Our results might provide new insights into a comprehensive framework of macroplastic distribution along global rivers, suggesting the river rod approach as a way for future monitoring as all the complete course of a river plays a pivotal role in accumulating macroplastics.

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Microplastics exposure causes oxidative stress and microbiota dysbiosis in planarian Dugesia japonica

Cited by 27 publications

References 69 publications

Multigenerational exposure of microplastics on the microbiota of E. affinis (copepod): a comparative study between biodegradable and nonbiodegradable microplastics

Multigenerational exposure of microplastics on the microbiota of E. affinis (copepod): a comparative study between biodegradable and nonbiodegradable microplastics

Biological responses of Chironomus sancticaroli to exposure to naturally aged PP microplastics under realistic concentrations

Riverine macroplastic gradient along watercourses: A global overview

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