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Everett J, Brooks J, Lermyte F, O'Connor PB, Sadler PJ, Dobson J, Collingwood JF, Telling ND. Iron stored in ferritin is chemically reduced in the presence of aggregating Aβ(1-42). Sci Rep 2020; 10:10332. [PMID: 32587293 PMCID: PMC7316746 DOI: 10.1038/s41598-020-67117-z] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Accepted: 05/28/2020] [Indexed: 12/25/2022] Open
Abstract
Atypical low-oxidation-state iron phases in Alzheimer's disease (AD) pathology are implicated in disease pathogenesis, as they may promote elevated redox activity and convey toxicity. However, the origin of low-oxidation-state iron and the pathways responsible for its formation and evolution remain unresolved. Here we investigate the interaction of the AD peptide β-amyloid (Aβ) with the iron storage protein ferritin, to establish whether interactions between these two species are a potential source of low-oxidation-state iron in AD. Using X-ray spectromicroscopy and electron microscopy we found that the co-aggregation of Aβ and ferritin resulted in the conversion of ferritin's inert ferric core into more reactive low-oxidation-states. Such findings strongly implicate Aβ in the altered iron handling and increased oxidative stress observed in AD pathogenesis. These amyloid-associated iron phases have biomarker potential to assist with disease diagnosis and staging, and may act as targets for therapies designed to lower oxidative stress in AD tissue.
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Affiliation(s)
- James Everett
- School of Pharmacy and Bioengineering, Keele University, Stoke-on-Trent, Staffordshire, ST4 7QB, United Kingdom.
- School of Engineering, University of Warwick, Coventry, CV4 7AL, United Kingdom.
| | - Jake Brooks
- School of Engineering, University of Warwick, Coventry, CV4 7AL, United Kingdom
| | - Frederik Lermyte
- School of Engineering, University of Warwick, Coventry, CV4 7AL, United Kingdom
- Department of Chemistry, University of Warwick, Coventry, CV4 7AL, United Kingdom
| | - Peter B O'Connor
- Department of Chemistry, University of Warwick, Coventry, CV4 7AL, United Kingdom
| | - Peter J Sadler
- Department of Chemistry, University of Warwick, Coventry, CV4 7AL, United Kingdom
| | - Jon Dobson
- J. Crayton Pruitt Family Department of Biomedical Engineering & Department of Materials Science and Engineering, University of Florida, Gainesville, Florida, 32611, United States
- Department of Materials Science and Engineering, University of Florida, Gainesville, Florida, 32611, United States
| | | | - Neil D Telling
- School of Pharmacy and Bioengineering, Keele University, Stoke-on-Trent, Staffordshire, ST4 7QB, United Kingdom
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Veskoukis AS. Redox signaling and antioxidant defense in pathogenic microorganisms: a link to disease and putative therapy. Pathology 2020. [DOI: 10.1016/b978-0-12-815972-9.00008-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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On the mechanism of the electrophysiological changes and membrane lesions induced by asbestos fiber exposure in Xenopus laevis oocytes. Sci Rep 2019; 9:2014. [PMID: 30765791 PMCID: PMC6376119 DOI: 10.1038/s41598-019-38591-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 12/10/2018] [Indexed: 01/09/2023] Open
Abstract
The so-called amphibole asbestos fibers are enriched with mineral iron ions, able to stimulate ROS production. We recently reported that crocidolite asbestos was able to interact with the cell membranes of Xenopus laevis oocytes, to alter their electrical membrane properties. Here, we found that applied iron ions (Fe3+) or H2O2 (for ROS generation) mimicked these effects, suggesting that at least one effect of iron-containing asbestos fiber exposure was mediated by ROS production. Furthermore, combined Fe3+ and H2O2 acted synergistically, producing a membrane effect stronger than that induced by these factors alone. Similar to crocidolite, these changes peaked within 30 minutes of incubation and vanished almost completely after 120 min. However, in the presence of cytochalasin D, which inhibits membrane actin repair mechanisms, crocidolite or applied Fe3+/H2O2 invariably produced oocyte cell death. While the electrophysiological modifications induced by crocidolite suggested a modification of an intrinsic chloride ion channel, the morphological appearance of the treated oocytes also indicated the formation of membrane “pores”; the effects of asbestos exposure may therefore consist of multiple (not necessarily exclusive) underlying mechanisms. In conclusion, using Xenopus oocytes allowed us for the first time, to focus on a specific membrane effect of crocidolite asbestos exposure, which deserves to be tested also on human lung cell lines. Much available evidence suggests that asbestos fibers damage cells through the production of ROS. Our present data confirm that crocidolite fibers can indeed trigger ROS-mediated damaging effects in the oocyte cell membrane, provided iron ions and H2O2 are available for ROS production.
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Hitha H, Gowda D, Mirajkar A. Serum ferritin level as an early indicator of metabolic dysregulation in young obese adults - a cross-sectional study. Can J Physiol Pharmacol 2018; 96:1255-1260. [PMID: 30312547 DOI: 10.1139/cjpp-2018-0433] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The aim of this study was to investigate the relationship between serum ferritin level and antioxidative status and metabolic dysregulation in young adult obese population. This cross-sectional study included 300 subjects of either sex, grouped as obese and non-obese subjects. The body mass index, total iron binding capacity, fasting blood glucose, superoxide dismutase activity, and levels of serum ferritin, iron, total cholesterol, high-density lipoprotein cholesterol, low-density lipoprotein cholesterol, triglyceride, glutathione, and vitamin C were estimated. Analysis showed a significant alteration in all the parameters in obese adults. The correlation of ferritin level and body mass index showed a positive correlation (r = -0.81, p < 0.001, respectively) with levels of fasting blood glucose, superoxide dismutase, total cholesterol, low-density lipoprotein cholesterol, and triglyceride in obese individuals, whereas an insignificant correlation with vitamin C and glutathione level was observed in obese individuals. The significant positive correlation of ferritin level with the metabolic parameters and some antioxidative parameters in obese individuals signifies the development of metabolic disorders. Therefore, estimation of serum ferritin level will be an important early indicator for the risk of developing metabolic disorders in young adults.
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Affiliation(s)
- Harshitha Hitha
- b K.S. Hegde Medical Academy, Nitte (Deemed to be University), Mangalore, Karnataka, India 575018
| | - Damodara Gowda
- a Department of Physiology, K.S. Hegde Medical Academy, Nitte (Deemed to be University), Mangalore, Karnataka, India 575018
| | - Amrit Mirajkar
- a Department of Physiology, K.S. Hegde Medical Academy, Nitte (Deemed to be University), Mangalore, Karnataka, India 575018
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Abstract
The abundance of oxidants and reductants must be balanced for an organism to thrive. Bacteria have evolved methods to prevent redox imbalances and to mitigate their deleterious consequences through the expression of detoxification enzymes, antioxidants, and systems to repair or degrade damaged proteins and DNA. Regulating these processes in response to redox changes requires sophisticated surveillance strategies ranging from metal chelation to direct sensing of toxic reactive oxygen species. In the case of bacterial pathogens, stress that threatens to disrupt redox homeostasis can derive from endogenous sources (produced by the bacteria) or exogenous sources (produced by the host). This minireview summarizes the sources of redox stress encountered during infection, the mechanisms by which bacterial pathogens diminish the damaging effects of redox stress, and the clever ways some organisms have evolved to thrive in the face of redox challenges during infection.
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Ghedira J, Chicano-Gálvez E, Fernández-Cisnal R, Jebali J, Banni M, Chouba L, Boussetta H, López-Barea J, Alhama J. Using environmental proteomics to assess pollutant response of Carcinus maenas along the Tunisian coast. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 541:109-118. [PMID: 26402481 DOI: 10.1016/j.scitotenv.2015.09.032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 09/07/2015] [Accepted: 09/07/2015] [Indexed: 06/05/2023]
Abstract
Biochemical responses to pollutants were studied at four Tunisia littoral sites using Carcinus maenas as a bioindicator. Proteomic analysis was used to assess the global impact of complex pollution mixtures, and to provide new biomarkers and basic insights into pollutant toxicity. Metal contents and metallothionein levels followed a gradient based on sampling sites: Bizerte ≫ Teboulba > Gargour~Mahres. Approximately 900 and 700 spots were resolved in digestive glands and gills, respectively. Gills from Bizerte animals had the maximum number of altered spots, mostly upregulated. In other locations, the number of altered spots in gills decreased in parallel to total metals in in the following order: Teboulba > Gargour > Mahres (mostly downregulated). Out of the 39 spots excised, ten proteins were identified in digestive glands and eight in gills. Digestive glands of Bizerte crabs had higher levels of ferritin, three vitellogenin forms and mannose-binding protein, while Gargour crabs had higher levels of four cryptocyanin forms. Gills of Bizerte crabs had higher levels of ferritin, three vitellogenins forms, lectin 4C, actin, and collagenolytic serine protease. Proteins with altered expression in crabs from Tunisia littoral are related to molting, oxidative stress and inflammation, innate immune response, and proteolysis.
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Affiliation(s)
- Jihene Ghedira
- Laboratory of Biochemical and Environmental Toxicology, Higher Institute of Agriculture, Chott-Mariem, 4042 Sousse, Tunisia
| | - Eduardo Chicano-Gálvez
- Department of Biochemistry and Molecular Biology, University of Córdoba, 14071 Córdoba, Spain
| | | | - Jamel Jebali
- Laboratory of Biochemical and Environmental Toxicology, Higher Institute of Agriculture, Chott-Mariem, 4042 Sousse, Tunisia
| | - Mohamed Banni
- Laboratory of Biochemical and Environmental Toxicology, Higher Institute of Agriculture, Chott-Mariem, 4042 Sousse, Tunisia
| | - Lassaad Chouba
- Chemical Laboratory, Higher Institute of Marine Sciences and Technology, La Goulette Center, 2060 Tunis, Tunisia
| | - Hamadi Boussetta
- Laboratory of Biochemical and Environmental Toxicology, Higher Institute of Agriculture, Chott-Mariem, 4042 Sousse, Tunisia
| | - Juan López-Barea
- Department of Biochemistry and Molecular Biology, University of Córdoba, 14071 Córdoba, Spain.
| | - José Alhama
- Department of Biochemistry and Molecular Biology, University of Córdoba, 14071 Córdoba, Spain
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Cheng X, Gao DX, Song JJ, Ren FZ, Mao XY. Casein glycomacropeptide hydrolysate exerts cytoprotection against H2O2-induced oxidative stress in RAW 264.7 macrophages via ROS-dependent heme oxygenase-1 expression. RSC Adv 2015. [DOI: 10.1039/c4ra10034d] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Casein glycomacropeptide hydrolysate had antioxidant activity and exerted protective actions against H2O2-induced oxidative stress via induction of Nrf2-mediated HO-1 expression in RAW 264.7 macrophages.
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Affiliation(s)
- Xue Cheng
- Key Laboratory of Functional Dairy
- College of Food Science and Nutritional Engineering
- China Agricultural University
- Beijing
- P. R. China
| | - Dong-Xiao Gao
- Key Laboratory of Functional Dairy
- College of Food Science and Nutritional Engineering
- China Agricultural University
- Beijing
- P. R. China
| | - Jia-Jia Song
- Key Laboratory of Functional Dairy
- College of Food Science and Nutritional Engineering
- China Agricultural University
- Beijing
- P. R. China
| | - Fa-Zheng Ren
- Key Laboratory of Functional Dairy
- College of Food Science and Nutritional Engineering
- China Agricultural University
- Beijing
- P. R. China
| | - Xue-Ying Mao
- Key Laboratory of Functional Dairy
- College of Food Science and Nutritional Engineering
- China Agricultural University
- Beijing
- P. R. China
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Fernández-Cisnal R, Alhama J, Abril N, Pueyo C, López-Barea J. Redox proteomics as biomarker for assessing the biological effects of contaminants in crayfish from Doñana National Park. THE SCIENCE OF THE TOTAL ENVIRONMENT 2014; 490:121-133. [PMID: 24846406 DOI: 10.1016/j.scitotenv.2014.04.117] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Revised: 04/14/2014] [Accepted: 04/28/2014] [Indexed: 06/03/2023]
Abstract
Despite its environmental relevance and sensitivity, Doñana National Park (DNP) is under high ecological pressure. In crayfish (Procambarus clarkii), the utility of redox proteomics as a novel biomarker was evaluated in the aquatic ecosystems of DNP and its surroundings, where agricultural activity is a serious concern. After fluorescence labeling of reversibly oxidized Cys and 2-DE separation, the total density of proteins with reversibly oxidized thiols was found to be much higher in animals from the Matochal (MAT) and Rocina (ROC) streams, while no difference was found in crayfish from Partido (PAR) stream compared to those from the DNP core at Lucio del Palacio (the negative control). The 2-DE analysis revealed 35 spots with significant differences in thiol oxidation, among which 19 proteins were identified via MALDI-TOF/TOF. While 3 spots, identified as ferritin, showed higher oxidation levels in ROC, other identified proteins were more intense at MAT than at ROC (superoxide dismutase, protein disulfide isomerase and actin) or were overoxidized only in MAT (nucleoside diphosphate kinase, fructose-biphosphate aldolase, fatty acid-binding protein, phosphopyruvate hydratase). For most of the identified proteins, spots corresponding to different Cys oxidized forms were detected, and the native forms, without oxidized thiol groups were also found in some of them. Evidence of reversible oxidation was found for specific Cys residues, including Cys13 in ferritin as well as Cys76 and Cys108 in nucleoside diphosphate kinase. The identified thiol-oxidized proteins provide information about the metabolic pathways and/or physiological processes affected by pollutant-elicited oxidative stress.
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Affiliation(s)
- Ricardo Fernández-Cisnal
- Department of Biochemistry and Molecular Biology, Agrifood Campus of International Excellence (ceiA3), University of Córdoba, Córdoba, Spain
| | - José Alhama
- Department of Biochemistry and Molecular Biology, Agrifood Campus of International Excellence (ceiA3), University of Córdoba, Córdoba, Spain
| | - Nieves Abril
- Department of Biochemistry and Molecular Biology, Agrifood Campus of International Excellence (ceiA3), University of Córdoba, Córdoba, Spain
| | - Carmen Pueyo
- Department of Biochemistry and Molecular Biology, Agrifood Campus of International Excellence (ceiA3), University of Córdoba, Córdoba, Spain
| | - Juan López-Barea
- Department of Biochemistry and Molecular Biology, Agrifood Campus of International Excellence (ceiA3), University of Córdoba, Córdoba, Spain.
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Ahn EH, Kim DW, Shin MJ, Jo HS, Eom SA, Kim DS, Park EY, Park JH, Cho SW, Park J, Eum WS, Son O, Hwang HS, Choi SY. Fenobam promoted the neuroprotective effect of PEP-1-FK506BP following oxidative stress by increasing its transduction efficiency. BMB Rep 2014; 46:561-6. [PMID: 24152913 PMCID: PMC4133844 DOI: 10.5483/bmbrep.2013.46.11.080] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2013] [Revised: 04/15/2013] [Accepted: 04/24/2013] [Indexed: 11/30/2022] Open
Abstract
We examined the ways in which fenobam could promote not only the transduction of PEP-1-FK506BP into cells and tissues but also the neuroprotective effect of PEP-1-FK506BP against ischemic damage. Fenobam strongly enhanced the protective effect of PEP-1-FK506BP against H2O2-induced toxicity and DNA fragmentation in C6 cells. In addition, combinational treatment of fenobam with PEP-1-FK506BP significantly inhibited the activation of Akt and MAPK induced by H2O2, compared to treatment with PEP-1-FK506BP alone. Interestingly, our results showed that fenobam significantly increased the transduction of PEP-1-FK506BP into both C6 cells and the hippocampus of gerbil brains. Subsequently, a transient ischemic gerbil model study demonstrated that fenobam pretreatment led to the increased neuroprotection of PEP-1-FK506BP in the CA1 region of the hippocampus. Therefore, these results suggest that fenobam can be a useful agent to enhance the transduction of therapeutic PEP-1-fusion proteins into cells and tissues, thereby promoting their neuroprotective effects. [BMB Reports 2013; 46(11): 561-566]
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Affiliation(s)
- Eun Hee Ahn
- Department of Biomedical Science and Research Institute of Bioscience and Biotechnology, Hallym University, Chuncheon 200-702, Korea
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Abstract
Reactive oxygen species (ROS) are deadly weapons used by phagocytes and other cell types, such as lung epithelial cells, against pathogens. ROS can kill pathogens directly by causing oxidative damage to biocompounds or indirectly by stimulating pathogen elimination by various nonoxidative mechanisms, including pattern recognition receptors signaling, autophagy, neutrophil extracellular trap formation, and T-lymphocyte responses. Thus, one should expect that the inhibition of ROS production promote infection. Increasing evidences support that in certain particular infections, antioxidants decrease and prooxidants increase pathogen burden. In this study, we review the classic infections that are controlled by ROS and the cases in which ROS appear as promoters of infection, challenging the paradigm. We discuss the possible mechanisms by which ROS could promote particular infections. These mechanisms are still not completely clear but include the metabolic effects of ROS on pathogen physiology, ROS-induced damage to the immune system, and ROS-induced activation of immune defense mechanisms that are subsequently hijacked by particular pathogens to act against more effective microbicidal mechanisms of the immune system. The effective use of antioxidants as therapeutic agents against certain infections is a realistic possibility that is beginning to be applied against viruses.
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Affiliation(s)
- Claudia N Paiva
- Departamento de Imunologia, Instituto de Microbiologia , CCS Bloco D, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
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Dupré-Crochet S, Erard M, Nüβe O. ROS production in phagocytes: why, when, and where? J Leukoc Biol 2013; 94:657-70. [PMID: 23610146 DOI: 10.1189/jlb.1012544] [Citation(s) in RCA: 305] [Impact Index Per Article: 27.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
In the phagocytosis field, ROS production by the phagocyte NOX has been associated with pathogen killing for the last 50 years. Since the discovery of nonphagocyte NOX, numerous other roles for ROS production have been identified. Oxidative stress and ROS-mediated signaling have received much attention in recent years. Much lower concentrations of ROS may be required for signaling compared with microbial killing. Based on the discoveries in nonphagocytic cells, it became logical to look for ROS functions distinct from pathogen killing, even in phagocytes. ROS are now linked to various forms of cell death, to chemotaxis, and to numerous modifications of cellular processes, including the NOX itself. ROS functions are clearly concentration-dependent over a wide range of concentrations. How much is required for which function? Which species are required for how much time? Is ROS signaling only a side effect of bactericidal ROS production? One major obstacle to answer these questions is the difficulty of reliable quantitative ROS detection. Signal transduction often takes place on a subcellular scale over periods of seconds or minutes, so the detection methods need to provide appropriate time and space resolution. We present examples of local ROS production, decreased degradation, signaling events, and potentially ROS-sensitive functions. We attempt to illustrate the current limitations for quantitative spatiotemporal ROS detection and point out directions for ongoing development. Probes for localized ROS detection and for combined detection of ROS, together with protein localization or other cellular parameters, are constantly improved.
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Lee JY, Park JM, Hong JA, Lee DC, Im JA, Lee JW. Serum Ferritin Is Differentially Associated with Anti-oxidative Status and Insulin Resistance in Healthy Obese and Non-obese Women. Korean J Fam Med 2012; 33:205-10. [PMID: 22916322 PMCID: PMC3418339 DOI: 10.4082/kjfm.2012.33.4.205] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2011] [Accepted: 06/20/2012] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Ferritin is known to be associated with insulin resistance (IR) and oxidative stress; however, recent studies have shown that there is an association between ferritin and anti-oxidative status. To date, the biphasic response of ferritin to oxidative stress has not been fully evaluated. Thus, we investigated the association between ferritin and IR and anti-oxidative status in obese and non-obese women. METHODS We evaluated the homeostasis model assessment of insulin resistance (HOMA-IR) and total anti-oxidant status (TAS) in a total of 111 healthy women between the ages of 32 and 68 years. RESULTS In all of the study subjects, ferritin levels were positively correlated with age (r = 0.38, P < 0.001), body mass index (r = 0.24, P = 0.01), TAS (r = 0.38, P < 0.001) and HOMA-IR (r = 0.20, P = 0.04). In the subgroup analysis, ferritin levels were correlated with age (r = 0.39, P < 0.001) and TAS (r = 0.43, P < 0.001) in the non-obese group and with insulin (r = 0.50, P = 0.02) and HOMA-IR (r = 0.52, P = 0.01) levels in the obese group. On stepwise multiple linear regression analysis, ferritin was found to be independently associated with TAS (B = 177.16, P < 0.0001) in the non-obese group and independently associated with HOMA-IR (B = 30.36, P = 0.01) in the obese group. CONCLUSION Our findings suggest ferritin is associated with IR in obese women and with anti-oxidative status in non-obese women. Further studies are warranted to elucidate the precise role of ferritin in obesity.
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Affiliation(s)
- Jee-Yon Lee
- Department of Family Medicine, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
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