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Crystal structures and magnetism of novel dinuclear dipicolinate compounds containing neocuproine. INORG CHEM COMMUN 2019. [DOI: 10.1016/j.inoche.2019.04.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Nunes EA, Manieri TM, Matias AC, Bertuchi FR, da Silva DA, Lago L, Sato RH, Cerchiaro G. Protective effects of neocuproine copper chelator against oxidative damage in NSC34 cells. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2018; 836:62-71. [DOI: 10.1016/j.mrgentox.2018.06.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Revised: 06/23/2018] [Accepted: 06/25/2018] [Indexed: 11/28/2022]
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Nagao T, Nakayama‑Imaohji H, Elahi M, Tada A, Toyonaga E, Yamasaki H, Okazaki K, Miyoshi H, Tsuchiya K, Kuwahara T. L‑histidine augments the oxidative damage against Gram‑negative bacteria by hydrogen peroxide. Int J Mol Med 2018; 41:2847-2854. [DOI: 10.3892/ijmm.2018.3473] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Accepted: 02/05/2018] [Indexed: 11/05/2022] Open
Affiliation(s)
- Tamiko Nagao
- Department of Microbiology, Faculty of Medicine, Kagawa University, Miki, Kagawa 761‑0793, Japan
| | | | - Miad Elahi
- Department of Microbiology, Faculty of Medicine, Kagawa University, Miki, Kagawa 761‑0793, Japan
| | - Ayano Tada
- Department of Microbiology, Faculty of Medicine, Kagawa University, Miki, Kagawa 761‑0793, Japan
| | - Emika Toyonaga
- Department of Microbiology, Faculty of Medicine, Kagawa University, Miki, Kagawa 761‑0793, Japan
| | - Hisashi Yamasaki
- Division of Biology, Hyogo College of Medicine, Mukogawa, Nishinomiya 663‑8501, Japan
| | - Katsuichiro Okazaki
- Department of Applied Bioscience, Faculty of Agriculture, Kagawa University, Miki, Kagawa 761‑0795, Japan
| | - Hirokazu Miyoshi
- Advance Radiation Research, Education and Management Center, Tokushima University, Tokushima 770‑8503, Japan
| | - Koichiro Tsuchiya
- Department of Medical Pharmacology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima 770‑8505, Japan
| | - Tomomi Kuwahara
- Department of Microbiology, Faculty of Medicine, Kagawa University, Miki, Kagawa 761‑0793, Japan
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Zubko EI, Zubko MK. Co-operative inhibitory effects of hydrogen peroxide and iodine against bacterial and yeast species. BMC Res Notes 2013; 6:272. [PMID: 23856115 PMCID: PMC3716994 DOI: 10.1186/1756-0500-6-272] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Accepted: 07/04/2013] [Indexed: 02/04/2023] Open
Abstract
BACKGROUND Hydrogen peroxide and iodine are powerful antimicrobials widely used as antiseptics and disinfectants. Their antimicrobial properties are known to be enhanced by combining them with other compounds. We studied co-operative inhibitory activities (synergism, additive effects and modes of growth inhibition) of hydrogen peroxide and iodine used concurrently against 3 bacterial and 16 yeast species. RESULTS Synergistic or additive inhibitory effects were shown for hydrogen peroxide and iodine mixtures against all 19 species used in the study. Both biocides were mostly cidal individually and in mixtures against Pseudomonas aeruginosa and Staphylococcus aureus. Both compounds manifested static inhibitory effects individually, but their mixtures were synergistically cidal for Saccharomyces cerevisiae and Escherihia coli. Cells of S. cerevisiae treated with hydrogen peroxide and iodine-hydrogen peroxide mixture produced increased numbers of respiratory deficient mutants indicating genotoxic effects. CONCLUSION Iodine and hydrogen peroxide used concurrently interact synergistically or additively against a range of prokaryotic and eukaryotic microorganisms. The study provides an insight as to how these traditional antimicrobials could be used more effectively for disinfection and antisepsis. In addition, a simple approach is proposed for scoring genotoxicity of different biocides by using the budding yeast system.
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Affiliation(s)
- Elena I Zubko
- School of Healthcare Science, Manchester Metropolitan University, John Dalton Building, Chester St, Manchester M1 5GD, UK
| | - Mikhajlo K Zubko
- School of Healthcare Science, Manchester Metropolitan University, John Dalton Building, Chester St, Manchester M1 5GD, UK
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Hullo MF, Martin-Verstraete I, Soutourina O. Complex phenotypes of a mutant inactivated for CymR, the global regulator of cysteine metabolism in Bacillus subtilis. FEMS Microbiol Lett 2010; 309:201-7. [PMID: 20608979 DOI: 10.1111/j.1574-6968.2010.02043.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
We characterized various phenotypes of a mutant inactivated for CymR, the master regulator of cysteine metabolism in Bacillus subtilis. The deletion of cymR resulted in impaired growth in the presence of cystine and increased sensitivity to hydrogen peroxide-, disulfide-, paraquat- and tellurite-induced stresses. Estimation of metabolite pools suggested that these phenotypes could be the result of profound metabolic changes in the DeltacymR mutant including an increase of the intracellular cysteine pool and hydrogen sulfide formation, as well as a depletion of branched-chain amino acids.
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The pleiotropic CymR regulator of Staphylococcus aureus plays an important role in virulence and stress response. PLoS Pathog 2010; 6:e1000894. [PMID: 20485570 PMCID: PMC2869319 DOI: 10.1371/journal.ppat.1000894] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2009] [Accepted: 04/02/2010] [Indexed: 12/20/2022] Open
Abstract
We have characterized a novel pleiotropic role for CymR, the master regulator of cysteine metabolism. We show here that CymR plays an important role both in stress response and virulence of Staphylococcus aureus. Genes involved in detoxification processes, including oxidative stress response and metal ion homeostasis, were differentially expressed in a ΔcymR mutant. Deletion of cymR resulted in increased sensitivity to hydrogen peroxide-, disulfide-, tellurite- and copper-induced stresses. Estimation of metabolite pools suggests that this heightened sensitivity could be the result of profound metabolic changes in the ΔcymR mutant, with an increase in the intracellular cysteine pool and hydrogen sulfide formation. Since resistance to oxidative stress within the host organism is important for pathogen survival, we investigated the role of CymR during the infectious process. Our results indicate that the deletion of cymR promotes survival of S. aureus inside macrophages, whereas virulence of the ΔcymR mutant is highly impaired in mice. These data indicate that CymR plays a major role in virulence and adaptation of S. aureus for survival within the host. Staphylococcus aureus is a very harmful human pathogen that is a major cause of nosocomial infections. Humans have developed sophisticated defense strategies against invading bacteria, including the innate immune response, with the generation of an oxidative burst inside phagocytic cells. Staphylococcal infections are extremely difficult to eradicate due to the remarkable capacity of these bacteria to adapt to different environmental conditions both inside and outside the host organism. Sulfur metabolism is essential for all living organisms and is tightly controlled by regulatory proteins. In this paper, we revealed an important role for CymR, a major regulator of sulfur metabolism, in adaptation of S. aureus to the host environment. Inactivation of the gene encoding this regulator in S. aureus leads to a mutant bacterium with increased vulnerability to stress conditions including oxidative stress encountered inside the host. More importantly, the deletion of the cymR gene strongly affected the interaction of S. aureus with its host, leading to impaired virulence in mice. Our results place CymR among the potential targets for attenuation of S. aureus infections.
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Clioquinol inhibits peroxide-mediated toxicity through up-regulation of phosphoinositol-3-kinase and inhibition of p53 activity. Int J Biochem Cell Biol 2008; 40:1030-42. [DOI: 10.1016/j.biocel.2007.11.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2007] [Revised: 11/06/2007] [Accepted: 11/09/2007] [Indexed: 01/22/2023]
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Chen SH, Lin JK, Liu SH, Liang YC, Lin-Shiau SY. Apoptosis of Cultured Astrocytes Induced by the Copper and Neocuproine Complex through Oxidative Stress and JNK Activation. Toxicol Sci 2007; 102:138-49. [DOI: 10.1093/toxsci/kfm292] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Asad NR, Asad LMBO, Almeida CEBD, Felzenszwalb I, Cabral-Neto JB, Leitão AC. Several pathways of hydrogen peroxide action that damage the E. coli genome. Genet Mol Biol 2004. [DOI: 10.1590/s1415-47572004000200026] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
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Nakamura J, Purvis ER, Swenberg JA. Micromolar concentrations of hydrogen peroxide induce oxidative DNA lesions more efficiently than millimolar concentrations in mammalian cells. Nucleic Acids Res 2003; 31:1790-5. [PMID: 12626721 PMCID: PMC152865 DOI: 10.1093/nar/gkg263] [Citation(s) in RCA: 87] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Reactive oxygen species produce oxidized bases, deoxyribose lesions and DNA strand breaks in mammalian cells. Previously, we demonstrated that aldehydic DNA lesions (ADLs) were induced in mammalian cells by 10 mM hydrogen peroxide (H2O2). Interestingly, a bimodal H2O2 dose-response relationship in cell toxicity has been reported for Escherichia coli deficient in DNA repair as well as Chinese hamster ovary (CHO) cells. Furthermore, it has been demonstrated that H2O2 causes single-strand breaks in purified DNA in the presence of iron and induces mitochondrial DNA damage in CHO cells with a biphasic dose-response curve. Here we show that H2O2 produces ADLs at concentrations as low as 0.06 mM in HeLa cells and that lower concentrations of H2O2 were much more efficient at inducing ADLs than higher concentrations. This dose-response curve is strikingly similar to that for cell killing effects in E.coli deficient in DNA repair exposed to H2O2. Interestingly, serial treatment of submillimolar levels of H2O2 induced a massive accumulation of ADLs. The toxicity arising from H2O2 determined by intracellular NAD(P)H in cells correlated well with the formation of ADLs. The addition of dipyridyl, an iron (II)-specific chelator, significantly protected against DNA damage and cell toxicity from submillimolar, but not millimolar, amounts of H2O2. These results suggest that ADLs induced by submillimolar levels of H2O2 may be due to a Fenton-type reaction between H2O2 and intracellular iron ions in mammalian cells.
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Affiliation(s)
- Jun Nakamura
- Department of Environmental Sciences and Engineering, The University of North Carolina, Chapel Hill, NC 27599, USA.
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Asad LM, Medeiros DC, Felzenszwalb I, Leitão AC, Asad NR. Effects of low iron conditions on the repair of DNA lesions induced by Cumene hydroperoxide in Escherichia coli cells. Mutat Res 2001; 485:339-44. [PMID: 11585366 DOI: 10.1016/s0921-8777(01)00073-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
In the present study, we evaluated the sensitivity of different Escherichia coli strains to Cumene hydroperoxide (CHP) treatment under distinct conditions of Fe2+ availability. Our results showed that the pretreatment with an iron chelator (dipyridyl) protects all the tested strains against CHP toxic effects, but it was not sufficient to abolish the CHP induced mutagenesis. On the other hand, simultaneous pretreatment with both dipyridyl and neocuproine (copper chelator) leads to a complete protection against CHP mutagenic effects. Our data suggest the participation of copper ion in the CHP mutagenesis induced in E. coli.
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Affiliation(s)
- L M Asad
- Departamento de Biofísica e Biometria, Instituto de Biologia Roberto Alcantara Gomes, Universidade do Estado do Rio de Janeiro, RJ, Brazil
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Zhu BZ, Chevion M. Copper-mediated toxicity of 2,4,5-trichlorophenol: biphasic effect of the copper(I)-specific chelator neocuproine. Arch Biochem Biophys 2000; 380:267-73. [PMID: 10933881 DOI: 10.1006/abbi.2000.1919] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The lipophilic copper(I)-specific chelator neocuproine has been frequently used as an inhibitor of copper-mediated damage in biological systems. In this communication we report that the copper-mediated toxicity of 2,4,5-trichlorophenol is markedly potentiated by neocuproine at levels which are near-stoichiometric with respect to the copper concentration but is inhibited at higher concentrations. However, no potentiation was observed when neocuproine was substituted by bathocuproinedisulfonic acid, a negative charged ligand with essentially the same copper-binding characteristics as neocuproine. We found that the potentiation by neocuproine was due to the formation of a lipophilic copper complex, while the inhibition by bathocuproinedisulfonic acid was due to the formation of a hydrophilic one. Caution in the use of neocuproine to study copper-mediated toxicity is advised.
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Affiliation(s)
- B Z Zhu
- Department of Cellular Biochemistry, Hebrew University-Hadassah Schools of Medicine and Dental Medicine, Jerusalem, 91120, Israel.
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