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Fan Z, Huang Y, Duan Y, Tang Z, Yang X. Effects of silver nanoparticles and various forms of silver on nitrogen removal by the denitrifier Pseudomonas stutzeri and their toxicity mechanisms. Ecotoxicol Environ Saf 2024; 269:115785. [PMID: 38056119 DOI: 10.1016/j.ecoenv.2023.115785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Revised: 11/26/2023] [Accepted: 12/01/2023] [Indexed: 12/08/2023]
Abstract
Silver nanoparticles (AgNPs) are widely used in daily life and industry because of their excellent antibacterial properties. AgNPs can exist in wastewater in various forms, such as Ag+, Ag2SO4, Ag2CO3, Ag2S, Ag2O, and AgCl. To assess the potential environmental risk of AgNPs and various forms of Ag, their toxic effects were investigated using the common denitrifier species Pseudomonas stutzeri (P. stutzeri). The inhibitory effect of AgNPs and various forms of Ag on P. stutzeri growth and its denitrification performance occurred in a concentration-dependent manner. The denitrification efficiency of P. stutzeri decreased from 95%∼97% to 89∼95%, 74∼95%, and 56∼85% under low, medium, and high exposure doses, respectively, of AgNPs and various forms of Ag. The changes in cell membrane morphology and increases in lactate dehydrogenase (LDH) release indicated that AgNPs and various forms of Ag damaged the cell membrane of P. stutzeri. Oxidative stress caused by excessive accumulation of reactive oxygen species (ROS) increased superoxide dismutase (SOD) and catalase (CAT) activities and decreased glutathione (GSH) levels. Overall, this study will help elucidate the impact of AgNPs and their transformation products on nitrogen removal efficiency in wastewater biological treatment systems.
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Affiliation(s)
- Zengzeng Fan
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Yahui Huang
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Ying Duan
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Zhu Tang
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Xinping Yang
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China.
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Silina EV, Stupin VA, Manturova NE, Ivanova OS, Popov AL, Mysina EA, Artyushkova EB, Kryukov AA, Dodonova SA, Kruglova MP, Tinkov AA, Skalny AV, Ivanov VK. Influence of the Synthesis Scheme of Nanocrystalline Cerium Oxide and Its Concentration on the Biological Activity of Cells Providing Wound Regeneration. Int J Mol Sci 2023; 24:14501. [PMID: 37833949 PMCID: PMC10572590 DOI: 10.3390/ijms241914501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 09/13/2023] [Accepted: 09/19/2023] [Indexed: 10/15/2023] Open
Abstract
In the ongoing search for practical uses of rare-earth metal nanoparticles, cerium dioxide nanoparticles (nanoceria) have received special attention. The purpose of this research was to study the biomedical effects of nanocrystalline forms of cerium oxide obtained by different synthesis schemes and to evaluate the effect of different concentrations of nanoceria (from 10-2 to 10-6 M) on cells involved in the regeneration of skin cell structures such as fibroblasts, mesenchymal stem cells, and keratinocytes. Two different methods of nanoceria preparation were investigated: (1) CeO-NPs-1 by precipitation from aqueous solutions of cerium (III) nitrate hexahydrate and citric acid and (2) CeO-NPs-2 by hydrolysis of ammonium hexanitratocerate (IV) under conditions of thermal autoclaving. According to the X-ray diffraction, transmission electron microscopy, and dynamic light scattering data, CeO2-1 consists of individual particles of cerium dioxide (3-5 nm) and their aggregates with diameters of 60-130 nm. CeO2-2 comprises small aggregates of 8-20 nm in diameter, which consist of particles of 2-3 nm in size. Cell cultures of human fibroblasts, human mesenchymal stem cells, and human keratinocytes were cocultured with different concentrations of nanoceria sols (10-2, 10-3, 10-4, 10-5, and 10-6 mol/L). The metabolic activity of all cell types was investigated by MTT test after 48 and 72 h, whereas proliferative activity and cytotoxicity were determined by quantitative cell culture counting and live/dead test. A dependence of biological effects on the method of nanoceria preparation and concentration was revealed. Data were obtained with respect to the optimal concentration of sol to achieve the highest metabolic effect in the used cell cultures. Hypotheses about the mechanisms of the obtained effects and the structure of a fundamentally new medical device for accelerated healing of skin wounds were formulated. The method of nanoceria synthesis and concentration fundamentally and significantly change the biological activity of cell cultures of different types-from suppression to pronounced stimulation. The best biological activity of cell cultures was determined through cocultivation with sols of citrate nanoceria (CeO-NPs-1) at a concentration of 10-3-10-4 M.
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Affiliation(s)
- Ekaterina V. Silina
- Institute of Biodesign and Modeling of Complex Systems, Center of Bioelementology and Human Ecology, I.M. Sechenov First Moscow State Medical University (Sechenov University), 119991 Moscow, Russia; (M.P.K.); (A.A.T.); (A.V.S.)
| | - Victor A. Stupin
- Department of Hospital Surgery, Pirogov Russian National Research Medical University, 117997 Moscow, Russia;
| | - Natalia E. Manturova
- Department of Plastic and Reconstructive Surgery, Cosmetology and Cell Technologies, Pirogov Russian National Research Medical University, 117997 Moscow, Russia;
| | - Olga S. Ivanova
- Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 119071 Moscow, Russia;
| | - Anton L. Popov
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, 142290 Pushchino, Russia; (A.L.P.); (E.A.M.)
| | - Elena A. Mysina
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, 142290 Pushchino, Russia; (A.L.P.); (E.A.M.)
| | - Elena B. Artyushkova
- Research Institute of Experimental Medicine, Kursk State Medical University, 305041 Kursk, Russia; (E.B.A.); (A.A.K.); (S.A.D.)
| | - Alexey A. Kryukov
- Research Institute of Experimental Medicine, Kursk State Medical University, 305041 Kursk, Russia; (E.B.A.); (A.A.K.); (S.A.D.)
| | - Svetlana A. Dodonova
- Research Institute of Experimental Medicine, Kursk State Medical University, 305041 Kursk, Russia; (E.B.A.); (A.A.K.); (S.A.D.)
| | - Maria P. Kruglova
- Institute of Biodesign and Modeling of Complex Systems, Center of Bioelementology and Human Ecology, I.M. Sechenov First Moscow State Medical University (Sechenov University), 119991 Moscow, Russia; (M.P.K.); (A.A.T.); (A.V.S.)
| | - Alexey A. Tinkov
- Institute of Biodesign and Modeling of Complex Systems, Center of Bioelementology and Human Ecology, I.M. Sechenov First Moscow State Medical University (Sechenov University), 119991 Moscow, Russia; (M.P.K.); (A.A.T.); (A.V.S.)
- Laboratory of Ecobiomonitoring and Quality Control, Yaroslavl State University, 150003 Yaroslavl, Russia
| | - Anatoly V. Skalny
- Institute of Biodesign and Modeling of Complex Systems, Center of Bioelementology and Human Ecology, I.M. Sechenov First Moscow State Medical University (Sechenov University), 119991 Moscow, Russia; (M.P.K.); (A.A.T.); (A.V.S.)
- Laboratory of Ecobiomonitoring and Quality Control, Yaroslavl State University, 150003 Yaroslavl, Russia
| | - Vladimir K. Ivanov
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russia;
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