Identifying Challenges in Assessing Risks of Exposures of Silver Nanoparticles

Chawla, Jyoti; Singh, Divya; Sundaram, Baranidharan; Kumar, Arun

doi:10.1007/s12403-017-0245-y

Cited by 22 publications

(7 citation statements)

References 95 publications

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“…The widespread use of NP-containing products has led to the direct exposure of the terrestrial environment to these nanosized materials, raising concerns regarding their safety and biocompatibility with both living organisms and the environment [1,16,[98][99][100]. Therefore, the risks and hazard assessment of NP exposure for plants, soil organisms, and consequently, humans, as a result of contamination of the food chain need to be addressed [1,101,102]. To date, despite recent developments in plant nanotoxicology, an unequivocal understanding of the effects of NPs on terrestrial plants is lacking, with fundamental information gaps about their mechanisms of action [103][104][105].…”

Section: Discussionmentioning

confidence: 99%

Growth-Promoting Gold Nanoparticles Decrease Stress Responses in Arabidopsis Seedlings

et al. 2021

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The global economic success of man-made nanoscale materials has led to a higher production rate and diversification of emission sources in the environment. For these reasons, novel nanosafety approaches to assess the environmental impact of engineered nanomaterials are required. While studying the potential toxicity of metal nanoparticles (NPs), we realized that gold nanoparticles (AuNPs) have a growth-promoting rather than a stress-inducing effect. In this study we established stable short- and long-term exposition systems for testing plant responses to NPs. Exposure of plants to moderate concentrations of AuNPs resulted in enhanced growth of the plants with longer primary roots, more and longer lateral roots and increased rosette diameter, and reduced oxidative stress responses elicited by the immune-stimulatory PAMP flg22. Our data did not reveal any detrimental effects of AuNPs on plants but clearly showed positive effects on growth, presumably by their protective influence on oxidative stress responses. Differential transcriptomics and proteomics analyses revealed that oxidative stress responses are downregulated whereas growth-promoting genes/proteins are upregulated. These omics datasets after AuNP exposure can now be exploited to study the underlying molecular mechanisms of AuNP-induced growth-promotion.

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Section: Discussionmentioning

confidence: 99%

Growth-Promoting Gold Nanoparticles Decrease Stress Responses in Arabidopsis Seedlings

et al. 2021

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“…Despite the biological activities and a wide range applications of AgNPs, there is a lack of information regarding human health and environmental toxicity [9]. The extensive use of AgNPs in the world, release into the aquatic environment, has raised concern [10] for a high impact on aquatic life [11].…”

Section: Introductionmentioning

confidence: 99%

Long-term exposure to high-concentration silver nanoparticles induced toxicity, fatality, bioaccumulation, and histological alteration in fish (Cyprinus carpio)

Kakakhel

Sajjad

et al. 2021

Environ Sci Eur

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Background Currently, nanotechnology and nanoparticles have quickly emerged and have gained the attention of scientists due to their massive applications in environmental sectors. However, these environmental applications of silver nanoparticles potentially cause serious effects on terrestrial and aquatic organisms. In the current study, freshwater fish C. carpio were exposed to blood-mediated silver nanoparticles for toxicity, mortality, bioaccumulation, and histological alterations. Silver nanoparticles were fabricated using animal blood serum and their toxic effect was studied against common carp fish at different concentrations levels (0.03, 0.06, and 0.09 mg/L). Results The findings have revealed a little influence of blood-induced silver nanoparticles on fish behavior at the highest concentration (0.09 mg/L). However, bioaccumulation of blood-mediated silver nanoparticles was reported in different organs of fish. Maximum bioaccumulation of silver nanoparticles was reported in the liver, followed by the intestine, gills, and muscles. Furthermore, the findings have shown that the bioaccumulation of silver nanoparticles led to histopathological alterations; including damaged structure of gill tissue and have caused necrosis. It is summarized that histopathological alteration in gill and intestine mostly occurred by the highest concentration of blood-induced silver nanoparticles (0.09 mg/L). Conclusion This study provides evidence of the silver nanoparticles influence on aquatic life; however, further systematic studies are crucial to access the effects of AgNPs on aquatic life.

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“…AgNPs have various features with a diameter ranging from 1 to 100 nm (Ali et al, 2018). The, Massive usage of AgNPs around the world releases into the marine environment (Chawla, Singh, Sundaram, & Kumar, 2018). It is highly influential on aquatic life (Auclair et al, 2019), which leads to causes the loss of equilibrium in the ecosystem by the destruction of marine organisms (Mohsenpour et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Microscopic analysis of plant‐mediated silver nanoparticle toxicity in rainbow trout fish (Oncorhynchus mykiss)

Ali

Khan

Shah

et al. 2021

Microscopy Res & Technique

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Over the years, nanoscience and the application of nanomaterials have gained the attention of researchers due to their enormous application history. Especially, the application of AgNPs providing innovative solutions to a wide range of environmental issues, for instance, wastewater treatment, bioremediations, and environmental sensing. Besides all these, the environmental application of silver nanomaterials causes severe problems in the terrestrial and aquatic ecosystems. For their concern, the present study was conducted to expose rainbow trout fish (Oncorhynchus mykiss) to different concentrations of silver nanoparticles for 25 days. In the current study, mortality (LC50), accumulation, and histopathological changes were analyzed. The results have revealed that the silver nanoparticles were mostly accumulated in the liver followed by the intestine, gill, and muscles. The microscopic analysis has shown that the accumulation of silver nanoparticles led to histological changes in gill and intestinal tissues. Necrosis, degeneration, mucus substance on the surface of gill lamella, cell lysis, and gill lamella atrophy were found at (0.04 mg/L) and (0.06 mg/L). The findings in the current study showed less toxicity in the sense of mortality and accumulation of AgNPs. Therefore, further systematic studies are needed to access the influence of silver nanoparticles on the aquatic ecosystem.

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Identifying Challenges in Assessing Risks of Exposures of Silver Nanoparticles

Cited by 22 publications

References 95 publications

Growth-Promoting Gold Nanoparticles Decrease Stress Responses in Arabidopsis Seedlings

Growth-Promoting Gold Nanoparticles Decrease Stress Responses in Arabidopsis Seedlings

Long-term exposure to high-concentration silver nanoparticles induced toxicity, fatality, bioaccumulation, and histological alteration in fish (Cyprinus carpio)

Microscopic analysis of plant‐mediated silver nanoparticle toxicity in rainbow trout fish (Oncorhynchus mykiss)

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