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Wu C, Fu L, Li H, Liu X, Wan C. Using biochar to strengthen the removal of antibiotic resistance genes: Performance and mechanism. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 816:151554. [PMID: 34774630 DOI: 10.1016/j.scitotenv.2021.151554] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 11/04/2021] [Accepted: 11/05/2021] [Indexed: 06/13/2023]
Abstract
In this study, the excess activated sludge was used for pyrolysis to produce biochar with Ce modification. The removal process and mechanism of ampicillin resistance gene (ARGAmp) by biochar was investigated. The results showed that when pyrolyzing the excess sludge at 400 °C, the organic components in the sludge could be partially pyrolyzed and complexed with Ce. By accepting electrons from phenol or quinone, persistent free radicals (PFRs) were formed on the surface of biochar. On the optimized conditions with the initial ARGAmp concentration of 41.43 mg/L, the removal ratios of ARGAmp by adsorption, PFRs, hydroxyl free radicals (·OH) by adding H2O2 were 28.37%, 8.26%, and 27.56%. No melted DNA was detected in the treated samples. The oxidation process by PFRs and ·OH can directly destroy the ARGAmp structure. The phosphodiester bond in the base stacking structure and the phosphate bond in the nucleotide are the possible action sites of PFRs. Treated ARGAmp products were in the form of base pair residues or short-chain double helix structures. ·OH can be added to the bases of nucleotide molecules to form highly active free radical adducts. They can initiate molecular dehydrogenation and intermolecular proton transfer, resulting in oxidation of the base to the scission of the phosphate sugar backbone.
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Affiliation(s)
- Changyong Wu
- Research Center of Environmental Pollution Control Engineering Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Liya Fu
- Research Center of Environmental Pollution Control Engineering Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Huiqi Li
- Research Center of Environmental Pollution Control Engineering Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Xiang Liu
- Research Center of Environmental Pollution Control Engineering Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Chunli Wan
- Department of Environmental Science and Engineering, Fudan University, Shanghai 200438, China.
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Leonova E, Shvirksts K, Borisovs V, Smelovs E, Sokolovska J, Bisenieks E, Duburs G, Grube M, Sjakste N. Spectroscopic and electrochemical study of interactions between DNA and different salts of 1,4-dihydropyridine AV-153. PeerJ 2020; 8:e10061. [PMID: 33240591 PMCID: PMC7664466 DOI: 10.7717/peerj.10061] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Accepted: 09/08/2020] [Indexed: 01/28/2023] Open
Abstract
1,4-dihydropyridines (1,4-DHP) possess important biochemical and pharmacological properties, including antimutagenic and DNA-binding activity. The latter activity was first described for water-soluble 1,4-DHP with carboxylic group in position 4, the sodium salt of the 1,4-DHP derivative AV-153 among others. Some data show the modification of physicochemical properties and biological activities of organic compounds by metal ions that form the salts. We demonstrated the different affinity to DNA and DNA-protecting capacity of AV-153 salts, depending on the salt-forming ion (Na, K, Li, Rb, Ca, Mg). This study aimed to use different approaches to collate data on the DNA-binding mode of AV-153-Na and five other AV-153 salts. All the AV-153 salts in this study quenched the ethidium bromide and DNA complex fluorescence, which points to an intercalation binding mode. For some of them, the intercalation binding was confirmed using cyclic voltammetry and circular dichroism spectroscopy. It was shown that in vitro all AV-153 salts can interact with four DNA bases. The FTIR spectroscopy data showed the interaction of AV-153 salts with both DNA bases and phosphate groups. A preference for base interaction was observed as the AV-153 salts interacted mostly with G and C bases. However, the highest differences were detected in the spectral region assigned to phosphate groups, which might indicate either conformational changes of DNA molecule (B form to A or H form) or partial denaturation of the molecule. According to the UV/VIS spectroscopy data, the salts also interact with the human telomere repeat, both in guanine quadruplex (G4) and single-stranded form; Na and K salts manifested higher affinity to G4, Li and Rb -to single-stranded DNA.
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Affiliation(s)
- Elina Leonova
- Faculty of Medicine, University of Latvia, Riga, Latvia
| | - Karlis Shvirksts
- Institute of Microbiology and Biotechnology, University of Latvia, Riga, Latvia
| | - Vitalijs Borisovs
- Faculty of Medicine, University of Latvia, Riga, Latvia.,Latvian Institute of Organic Synthesis, Riga, Latvia
| | | | | | | | - Gunars Duburs
- Latvian Institute of Organic Synthesis, Riga, Latvia
| | - Mara Grube
- Institute of Microbiology and Biotechnology, University of Latvia, Riga, Latvia
| | - Nikolajs Sjakste
- Faculty of Medicine, University of Latvia, Riga, Latvia.,Latvian Institute of Organic Synthesis, Riga, Latvia
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Kobayashi H, Suzuki N, Ogra Y. Mutagenicity comparison of nine bioselenocompounds in three Salmonella typhimurium strains. Toxicol Rep 2018; 5:220-223. [PMID: 29854592 PMCID: PMC5978006 DOI: 10.1016/j.toxrep.2018.01.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Revised: 01/11/2018] [Accepted: 01/22/2018] [Indexed: 11/30/2022] Open
Abstract
Selenium (Se) is an essential element in animals but becomes severely toxic when the amount ingested exceeds the adequate intake level. It is known that the toxicological effects of Se are highly dependent on its chemical form. In this study, we evaluated the mutagenicity of nine naturally occurring Se compounds or the so-called bioselenocompounds, including selenite, selenate, selenocyanate, selenomethionine, selenocystine, Se-methylselenocysteine, selenohomolanthionine, N-acetylgalactosamine-type selenosugar, and trimethylselenonium ion, by using the Ames test. Salmonella typhimurium TA98, TA100, and TA1535 were used for the mutagenicity evaluation in the presence or absence of S9 mix, a metabolic activator. Only selenate showed weak mutagenicity even in the absence of S9 mix. None of the bioselenocompounds except selenate exhibited mutagenicity in all the strains tested in the presence or absence of S9 mix. Selenomethionine and selenocystine reduced the number of colonies in all the strains although no other selenoamino acids exerted the same effect. These results indicate that selenate directly or indirectly injures genome. Among the bioselenocompounds tested, selenomethionine and selenocystine show antibacterial activity, but the mechanism is unclear.
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Affiliation(s)
- Hironori Kobayashi
- Laboratory of Toxicology and Environmental Health, Graduate School of Pharmaceutical Sciences, Chiba University, Chuo, Chiba 260-8675, Japan
| | - Noriyuki Suzuki
- Laboratory of Toxicology and Environmental Health, Graduate School of Pharmaceutical Sciences, Chiba University, Chuo, Chiba 260-8675, Japan
| | - Yasumitsu Ogra
- Laboratory of Toxicology and Environmental Health, Graduate School of Pharmaceutical Sciences, Chiba University, Chuo, Chiba 260-8675, Japan
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Vargas-Caraveo A, Castillo-Michel H, Mejia-Carmona GE, Pérez-Ishiwara DG, Cotte M, Martínez-Martínez A. Preliminary studies of the effects of psychological stress on circulating lymphocytes analyzed by synchrotron radiation based-Fourier transform infrared microspectroscopy. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 128:141-146. [PMID: 24667417 DOI: 10.1016/j.saa.2014.02.148] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2013] [Revised: 02/13/2014] [Accepted: 02/23/2014] [Indexed: 06/03/2023]
Abstract
Psychological stress is a condition that not only generates behavioral disorders but also disrupts homeostasis and immune activity that can exacerbate or lead to inflammatory diseases. The aim of this work was to study biochemical changes in circulating immune cells from rats under psychological stress by using vibrational spectroscopy. A stress model was used, where exposure to a stressor was repeated for 5 days. Subsequently, circulating lymphocytes were examined for their biomolecular vibrational fingerprints with synchrotron radiation based-Fourier transform infrared microspectroscopy. The results showed an increased absorption at the ester lipid region (1720-1755 cm(-1)) in lymphocytes from stressed rats, suggesting lipid peroxidation. Statistical significant changes in wavenumber peak position and absorbance in the nucleic acid region were also observed (915-950 cm(-1) Z-DNA, 1090-1150 cm(-1) symmetric stretching of P-O-C, 1200-1260 cm(-1) asymmetric PO2 and 1570-1510 cm(-1) methylated nucleotides) which suggest a reduction of transcriptional activity in lymphocytes from stressed rat. These results unravel part of the mechanisms by which psychological stress may affect the immune system leading to systemic consequences.
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Affiliation(s)
- Alejandra Vargas-Caraveo
- Escuela Nacional de Medicina y Homeopatía, Instituto Politécnico Nacional, Guillermo Massieu Helguera, No. 239, Fraccionamiento "La Escalera", Ticomán, C.P. 07320 México DF, Mexico; Departamento de Ciencias Químico Biológicas, Instituto de Ciencias Biomédicas, Universidad Autónoma de Ciudad Juárez, Anillo envolvente Pronaf y Estocolmo s/n, 32310 Cd. Juárez, Mexico.
| | - Hiram Castillo-Michel
- ID21, European Synchrotron Radiation Facility, 6 Rue Jules Horowitz, 38000 Grenoble, France.
| | - Gloria Erika Mejia-Carmona
- Escuela Nacional de Medicina y Homeopatía, Instituto Politécnico Nacional, Guillermo Massieu Helguera, No. 239, Fraccionamiento "La Escalera", Ticomán, C.P. 07320 México DF, Mexico; Departamento de Ciencias Químico Biológicas, Instituto de Ciencias Biomédicas, Universidad Autónoma de Ciudad Juárez, Anillo envolvente Pronaf y Estocolmo s/n, 32310 Cd. Juárez, Mexico.
| | - David Guillermo Pérez-Ishiwara
- Escuela Nacional de Medicina y Homeopatía, Instituto Politécnico Nacional, Guillermo Massieu Helguera, No. 239, Fraccionamiento "La Escalera", Ticomán, C.P. 07320 México DF, Mexico.
| | - Marine Cotte
- ID21, European Synchrotron Radiation Facility, 6 Rue Jules Horowitz, 38000 Grenoble, France.
| | - Alejandro Martínez-Martínez
- Departamento de Ciencias Químico Biológicas, Instituto de Ciencias Biomédicas, Universidad Autónoma de Ciudad Juárez, Anillo envolvente Pronaf y Estocolmo s/n, 32310 Cd. Juárez, Mexico.
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Buraka E, Chen CYC, Gavare M, Grube M, Makarenkova G, Nikolajeva V, Bisenieks I, Brūvere I, Bisenieks E, Duburs G, Sjakste N. DNA-binding studies of AV-153, an antimutagenic and DNA repair-stimulating derivative of 1,4-dihydropiridine. Chem Biol Interact 2014; 220:200-7. [PMID: 25016077 DOI: 10.1016/j.cbi.2014.06.027] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2013] [Revised: 06/20/2014] [Accepted: 06/30/2014] [Indexed: 01/24/2023]
Abstract
UNLABELLED The ability to intercalate between DNA strands determines the cytotoxic activity of numerous anticancer drugs. Strikingly, intercalating activity was also reported for some compounds considered to be antimutagenic. The aim of this study was to determine the mode of interaction of DNA with the antimutagenic and DNA repair-stimulating dihydropyridine (DHP) AV-153. DNA and AV-153 interactions were studied by means of UV/VIS spectroscopy, fluorimetry and infrared spectroscopy. Compound AV-153 is a 1,4 dihydropyridine with ethoxycarbonyl groups in positions 3 and 5. Computer modeling of AV-153 and DNA interactions suggested an ability of the compound to dock between DNA strands at a single strand break site in the vicinity of two pyrimidines, which was confirmed in the present study. AV-153 evidently interacted with DNA, as addition of DNA to AV-153 solutions resulted in pronounced hyperchromic and bathochromic effects on the spectra. Base modification in a plasmid by peroxynitrite only minimally changed binding affinity of the compound; however, induction of single-strand breaks using Fenton's reaction greatly increased binding affinity. The affinity did not change when the ionic strength of the solution was changed from 5 to 150 mM NaCl, although it increased somewhat at 300 mM. Neither was it influenced by temperature changes from 25 to 40°C, however, it decreased when the pH of the solution was changed from 7.4 to 4.7. AV-153 competed with EBr for intercalation sites in DNA: 116 mM of the compound caused a two-fold decrease in fluorescence intensity. FT-IR spectral data analyses indicated formation of complexes between DNA and AV-153. The second derivative spectra analyses indicated interaction of AV-153 with guanine, cytosine and thymine bases, but no interaction with adenine was detected. CONCLUSIONS The antimutagenic substance AV-153 appears to intercalate between the DNA strands at the site of a DNA nick in the vicinity of two pyrimidines.
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Affiliation(s)
- E Buraka
- Department of Medical Biochemistry, Faculty of Medicine, University of Latvia, No. 4 Kronvalda Boulevard, Riga LV-1010, Latvia; Latvian Institute of Organic Synthesis, No. 21 Aizkraukles Street, Riga LV-1006, Latvia
| | - C Yu-Chian Chen
- Laboratory of Computational and Systems Biology, School of Chinese Medicine, China Medical University, Taichung 40402, Taiwan; Department of Bioinformatics, Asia University, Taichung 41354, Taiwan
| | - M Gavare
- Institute of Microbiology and Biotechnology, University of Latvia, No. 4 Kronvalda Boulevard, Riga LV-1010, Latvia
| | - M Grube
- Institute of Microbiology and Biotechnology, University of Latvia, No. 4 Kronvalda Boulevard, Riga LV-1010, Latvia
| | - G Makarenkova
- Faculty of Biology, University of Latvia, No. 4 Kronvalda Boulevard, Riga LV-1010, Latvia
| | - V Nikolajeva
- Faculty of Biology, University of Latvia, No. 4 Kronvalda Boulevard, Riga LV-1010, Latvia
| | - I Bisenieks
- Latvian Institute of Organic Synthesis, No. 21 Aizkraukles Street, Riga LV-1006, Latvia
| | - I Brūvere
- Latvian Institute of Organic Synthesis, No. 21 Aizkraukles Street, Riga LV-1006, Latvia
| | - E Bisenieks
- Latvian Institute of Organic Synthesis, No. 21 Aizkraukles Street, Riga LV-1006, Latvia
| | - G Duburs
- Latvian Institute of Organic Synthesis, No. 21 Aizkraukles Street, Riga LV-1006, Latvia
| | - N Sjakste
- Department of Medical Biochemistry, Faculty of Medicine, University of Latvia, No. 4 Kronvalda Boulevard, Riga LV-1010, Latvia; Latvian Institute of Organic Synthesis, No. 21 Aizkraukles Street, Riga LV-1006, Latvia.
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