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Effects of dispersible MoS2 nanosheets and Nano-silver coexistence on the metabolome of yeast
- Source :
- Chemosphere. 198:216-225
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- As a new rising star in the post-graphene two-dimensional materials (2DMs), molybdenum disulfide (MoS2) attracts increasing attentions and is widely applied. However, the chemical and toxicological interaction between MoS2 and other co-contaminants is still poorly understood. Nano-silver (N-Ag) is the most commonly used nanomaterial in commercial products and distributed widely in the environment. Herein, we investigated the effects of chitosan functionalized MoS2 (CS-MoS2) nanosheets, a water-dispersible form of MoS2, on the microbial toxicity of N-Ag. We found that the incorporation of CS-MoS2 nanosheets attenuated the oxidative stress induced by N-Ag on yeast cells, while caused more membrane stress. In addition, the inhibition of N-Ag on the metabolic activities of yeast cells could be attenuated by CS-MoS2 nanosheets as well. The coexistence of N-Ag and CS-MoS2 nanosheets mainly perturbed the amino acid-related metabolic pathways in yeast cells, and phosphoric acid was a potential nanotoxicity biomarker. We further found that CS-MoS2 nanosheets dramatically absorbed the Ag ion released from N-Ag, which might be responsible for its attenuation effect on the microbial toxicity of N-Ag. Our findings provide more new insights for the ecotoxicity evaluation of MoS2 and other 2DMs.
- Subjects :
- Environmental Engineering
Health, Toxicology and Mutagenesis
Saccharomyces cerevisiae
02 engineering and technology
010501 environmental sciences
01 natural sciences
Chitosan
chemistry.chemical_compound
Metabolome
Environmental Chemistry
Molybdenum disulfide
0105 earth and related environmental sciences
biology
Public Health, Environmental and Occupational Health
Silver Nano
General Medicine
General Chemistry
021001 nanoscience & nanotechnology
biology.organism_classification
Pollution
Yeast
Metabolic pathway
chemistry
Nanotoxicology
Biophysics
0210 nano-technology
Subjects
Details
- ISSN :
- 00456535
- Volume :
- 198
- Database :
- OpenAIRE
- Journal :
- Chemosphere
- Accession number :
- edsair.doi...........2c78ae92efd3a3e8d7dec6e94f85732d