Gut-microbial adaptation and transformation of silver nanoparticles mediated the detoxification of <i>Daphnia magna</i> and their offspring

Li, Yingdong; Liu, Hongbin; Wang, Wen‐Xiong

doi:10.1039/d1en00765c

Cited by 6 publications

(3 citation statements)

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“…The guts of D. magna following MNP exposure were removed using sterile dissection tweezers in a sterile Petri plate under a stereomicroscope . Individuals from each treatment group had their guts and gills transferred to 1.5 mL Eppendorf tubes and prepared for further measurement.…”

Section: Methodsmentioning

confidence: 99%

“…The guts of D. magna following MNP exposure were removed using sterile dissection tweezers in a sterile Petri plate under a stereomicroscope. 21 Individuals from each treatment group had their guts and gills transferred to 1.5 mL Eppendorf tubes and prepared for further measurement. The absolute MNP concentrations in the gastrointestinal tract and gills were assessed by direct measurement of fluorescence intensity using a previously reported method.…”

Section: Aiegen-containing Micro-(nano-) Plasticsmentioning

confidence: 99%

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Accumulation Kinetics and Gut Microenvironment Responses to Environmentally Relevant Doses of Micro/Nanoplastics by Zooplankton Daphnia Magna

Wang

2023

Environ. Sci. Technol.

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Microplastics are emerging pollutants that have been widely reported in aquatic ecosystems. Based on the analysis of environmentally relevant concentrations of microplastics in global freshwater systems, herein, we employed aggregated-induced emission (AIE) microplastic fluorogens and imaged and quantified the bioaccumulation of differentially charged micro-(20 μm)/ nano-(200 nm) plastics (MNPs) in zooplankton Daphnia magna. We found that all particles of different sizes and charges were readily ingested, especially larger-sized and positively charged MNPs, with over 50% of the ingested particles accumulating in the gut. Bioaccumulation of MNPs reached 50% of steady-state condition within 1 h. The presence of algae inhibited the ingestion and depuration of MNPs. To further demonstrate the effects of such accumulation on gut health, we further applied the AIE probes for visualizing the pH and esterase in the digestive tract, as well as the gut inflammation. An accumulation of MNPs in D. magna significantly and rapidly induced the acidification of gut pH while inducing esterase activity. The NPs apparently induced gut inflammation in contrast to the MPs, demonstrating the size-dependent effects on oxidative stress. Our results highlighted that MNP exposure at environmentally relevant concentrations perturbed the microenvironments of zooplankton guts, which may significantly affect their digestion and assimilation of food materials as well as contaminant uptake.

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Section: Methodsmentioning

confidence: 99%

Section: Aiegen-containing Micro-(nano-) Plasticsmentioning

confidence: 99%

Accumulation Kinetics and Gut Microenvironment Responses to Environmentally Relevant Doses of Micro/Nanoplastics by Zooplankton Daphnia Magna

Wang

2023

Environ. Sci. Technol.

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“…The intestinal microbiome is an integral part of the epithelial surface and mucus layer, crucial for both nutrient metabolism and inherent immune function. 16 Evidence suggested the contribution of the intestinal structure 17 or intestinal microbes 18 towards the function of the fish intestine to respond to external environmental stress. However, very little is known about the mechanisms of nZnO effects on the whole fish intestine health.…”

Section: Introductionmentioning

confidence: 99%

Reshaping fish intestinal microbiota and facilitating barrier function by ZnO nanoparticles

Wang

2023

Environ. Sci.: Nano

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Effects of dissolved organic matter on the environmental behavior and toxicity of metal nanomaterials: A review

Yang,

Wang,

et al. 2024

Chemosphere

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Gut-microbial adaptation and transformation of silver nanoparticles mediated the detoxification of Daphnia magna and their offspring

Abstract: Despite the extensive studies on the toxicity of antibacterial silver (either ionic Ag+ or nanoparticle - AgNPs) at the cellular or organismic levels, little is known about their differences in...

Cited by 6 publications

References 91 publications

Accumulation Kinetics and Gut Microenvironment Responses to Environmentally Relevant Doses of Micro/Nanoplastics by Zooplankton Daphnia Magna

Accumulation Kinetics and Gut Microenvironment Responses to Environmentally Relevant Doses of Micro/Nanoplastics by Zooplankton Daphnia Magna

Reshaping fish intestinal microbiota and facilitating barrier function by ZnO nanoparticles

Effects of dissolved organic matter on the environmental behavior and toxicity of metal nanomaterials: A review

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