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Teles GH, Xavier MR, Da Silva JM, De Souza RB, de Barros Pita W, de Morais MA. The Metabolism of Respiring Carbon Sources by Dekkera bruxellensis and Its Relation with the Production of Acetate. Appl Biochem Biotechnol 2023; 195:6369-6391. [PMID: 36867386 DOI: 10.1007/s12010-023-04398-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/17/2023] [Indexed: 03/04/2023]
Abstract
Dekkera bruxellensis has been studied for several aspects of its metabolism over the past years, which has expanded our comprehension on its importance to industrial fermentation processes and uncovered its industrial relevance. Acetate is a metabolite often found in D. bruxellensis aerobic cultivations, whereas its production is linked to decreased ethanol yields. In a previous work, we aimed to understand how acetate metabolism affected the fermentation capacity of D. bruxellensis. In the present work, we evaluated the role of acetate metabolism in respiring cells using ammonium or nitrate as nitrogen sources. Our results showed that galactose is a strictly respiratory sugar and that a relevant part of its carbon is lost, while the remaining is metabolised through the Pdh bypass pathway before being assimilated into biomass. When this pathway was blocked, yeast growth was reduced while more carbon was assimilated to the biomass. In nitrate, more acetate was produced as expected, which increased carbon assimilation, although less galactose was uptaken from the medium. This scenario was not affected by the Pdh bypass inhibition. The confirmation that acetate production was crucial for carbon assimilation was brought by cultivations in pyruvate. All physiological data were connected to the expression patterns of PFK1, PDC1, ADH1, ALD3, ALD5 and ATP1 genes. Other respiring carbon sources could only be properly used by the cells when some external acetate was supplied. Therefore, the results reported herein helped in providing valuable contributions to the understanding of the oxidative metabolism in this potential industrial yeast.
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Affiliation(s)
- Gilberto Henrique Teles
- Laboratory of Microbial Genetics, Department of Genetics, Federal University of Pernambuco, Av. Moraes Rego, 1235. Cidade Universitária, Recife, PE, 50.670-901, Brazil
| | - Mariana Rodrigues Xavier
- Laboratory of Microbial Genetics, Department of Genetics, Federal University of Pernambuco, Av. Moraes Rego, 1235. Cidade Universitária, Recife, PE, 50.670-901, Brazil
| | | | - Rafael Barros De Souza
- Laboratory of Microbial Metabolism, Institute of Biological Sciences, University of Pernambuco, Recife, Brazil
| | | | - Marcos Antonio de Morais
- Laboratory of Microbial Genetics, Department of Genetics, Federal University of Pernambuco, Av. Moraes Rego, 1235. Cidade Universitária, Recife, PE, 50.670-901, Brazil.
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2
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Ji Y, Hawkins CJ. Reconstitution of human pyroptotic cell death in Saccharomyces cerevisiae. Sci Rep 2023; 13:3095. [PMID: 36813876 PMCID: PMC9946934 DOI: 10.1038/s41598-023-29464-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Accepted: 02/06/2023] [Indexed: 02/24/2023] Open
Abstract
Pyroptosis is a lytic form of programmed cell death induced by the activation of gasdermins. The precise mechanism of gasdermin activation by upstream proteases remains incompletely understood. Here, we reconstituted human pyroptotic cell death in yeast by inducible expression of caspases and gasdermins. Functional interactions were reflected by the detection of cleaved gasdermin-D (GSDMD) and gasdermin-E (GSDME), plasma membrane permeabilization, and reduced growth and proliferative potential. Following overexpression of human caspases-1, -4, -5, and -8, GSDMD was cleaved. Similarly, active caspase-3 induced proteolytic cleavage of co-expressed GSDME. Caspase-mediated cleavage of GSDMD or GSDME liberated the ~ 30 kDa cytotoxic N-terminal fragments of these proteins, permeabilized the plasma membrane and compromised yeast growth and proliferation potential. Interestingly, the observation of yeast lethality mediated by co-expression of caspases-1 or -2 with GSDME signified functional cooperation between these proteins in yeast. The small molecule pan-caspase inhibitor Q-VD-OPh reduced caspase-mediated yeast toxicity, allowing us to expand the utility of this yeast model to investigate the activation of gasdermins by caspases that would otherwise be highly lethal to yeast. These yeast biological models provide handy platforms to study pyroptotic cell death and to screen for and characterize potential necroptotic inhibitors.
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Affiliation(s)
- Yanhao Ji
- grid.1018.80000 0001 2342 0938Department of Biochemistry and Chemistry, La Trobe Institute for Molecular Science, La Trobe University, Bundoora, VIC Australia
| | - Christine J. Hawkins
- grid.1018.80000 0001 2342 0938Department of Biochemistry and Chemistry, La Trobe Institute for Molecular Science, La Trobe University, Bundoora, VIC Australia
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Teles GH, da Silva JM, Xavier MR, de Souza RB, de Barros Pita W, de Morais Junior MA. Metabolic and biotechnological insights on the analysis of the Pdh bypass and acetate production in the yeast Dekkera bruxellensis. J Biotechnol 2022; 355:42-52. [PMID: 35760147 DOI: 10.1016/j.jbiotec.2022.06.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Revised: 06/01/2022] [Accepted: 06/21/2022] [Indexed: 11/29/2022]
Abstract
The advancement of knowledge about the physiology of Dekkera bruxellensis has shown its potential for the production of fuel ethanol very close to the conventional fermenting yeast S. cerevisiae. However, some aspects of its metabolism remain uncovered. In the present study, the respiro-fermentative parameters of D. bruxellensis GDB 248 were evaluated under different cultivation conditions. The results showed that sucrose was more efficiently converted to ethanol than glucose, regardless the nitrogen source, which points out for the industrial efficiency of this yeast in sucrose-based substrate. The blockage of the cytosolic acetate production incremented the yeast fermentative efficiency by 27% (in glucose) and 14% (in sucrose). On the other hand, the presence of nitrate as inducer of acetate production reducing the production of ethanol. Altogether, these results settled the hypothesis that acetate metabolism is the main constraint for ethanol production. Besides, this acetate-generating pathway seems to exert some regulatory action on the flux and distribution of the carbon flowing throught the central metabolism. These physiological aspects were corroborated by the relative expression analysis of key genes in the crossroad to ethanol, acetate and biomass formation. All the results were discussed in the light of the industrial potential of this yeast.
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Affiliation(s)
- Gilberto Henrique Teles
- Laboratory of Microbial Genetics, Department of Genetics, Federal University of Pernambuco, Recife, Brazil
| | - Jackeline Maria da Silva
- Laboratory of Molecular Genetics, Department of Antibiotics, Federal University of Pernambuco, Recife, Brazil
| | - Mariana Rodrigues Xavier
- Laboratory of Microbial Genetics, Department of Genetics, Federal University of Pernambuco, Recife, Brazil
| | - Rafael Barros de Souza
- Laboratory of Microbial Metabolism, Institute of Biological Sciences, University of Pernambuco, Recife, Brazil
| | - Will de Barros Pita
- Laboratory of Molecular Genetics, Department of Antibiotics, Federal University of Pernambuco, Recife, Brazil
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Screening the Antioxidant Activity of Thermal or Non-Thermally Treated Fruit Juices by In Vitro and In Vivo Assays. BEVERAGES 2022. [DOI: 10.3390/beverages8020036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The health benefits of fruit juices have been associated with their high content of antioxidant compounds. Commercial juice has been traditionally heat-processed to destroy microorganisms and enzymes. However, high temperatures induce undesirable changes in the nutritional value of the juice. High-intensity pulsed electric fields (HIPEF) are being studied as an alternative to heat treatments. In addition, in vitro and in vivo methods have been recommended to determine the antioxidant potential of juices in a complementary manner. Thus, the antioxidant activity of untreated, high-intensity pulsed electric fields (HIPEF) or heat-treated fruit juices (tomato, apple, pineapple and orange) was studied using in vitro (TEAC, DPPH, FRAP and Folin-Ciocalteu) and in vivo assays (Saccharomyces cerevisiae). Vitamin C and total phenolic compounds in these juices were determined. The highest antioxidant activities (12.01 mmol of Trolox/L) were obtained through the Folin-Ciocalteu assay in orange juices. The lowest values (0.119 mmol of Trolox/L) were found in apple juice analysed by the FRAP assay. Vitamin C content varied from 10 mg/L (orange juice) to 344 mg/L (orange juice). The highest concentration of total phenolic compounds was determined in orange juice (1238 mg/L), whereas the lowest value was found in tomato juices (149 mg/L). The effect of HIPEF and thermal processing on the antioxidant potential of juices depended on the fruits used to prepare the juices and the antioxidant activity assay conducted. Vitamin C concentration was directly related to the antioxidant activity analysed by Folin-Ciocalteu and FRAP methods and the S. cerevisiae growth rate. S. cerevisiae yeast can be used as a feasible in vivo assay to further determine the antioxidant activity of fruit juices.
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Navrátilová A, Kovár M, Požgajová M. Ascorbic acid mitigates cadmium-induced stress, and contributes to ionome stabilization in fission yeast. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:15380-15393. [PMID: 33236313 DOI: 10.1007/s11356-020-11480-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 10/29/2020] [Indexed: 06/11/2023]
Abstract
Cadmium is a highly toxic environmental pollutant which through enhancement of reactive oxygen species (ROS) production triggers oxidative stress to the cell. Cell growth, a fundamental feature of all living organisms is closely connected to the cell shape and homeostasis. As these processes largely depend on cell fitness status and environmental conditions we have analyzed, the impact of different cadmium concentrations and the effect of ascorbic acid (ascorbate, AsA) supplementation on cell growth parameters, cell morphology, and ionome balance maintenance in Schizosaccharomyces pombe. We show that cadmium causes membrane lipid peroxidation resulting in cell shape alterations leading to growth impairment and through mineral elements disequilibrium affects ionome homeostasis in a dose- and time-dependent manner. AsA recognized as one of the most prominent antioxidants, when overdosed, displays considerable pro-oxidant activity, though precise dosing of its supplementation is desired. We present here that AsA under efficacious concentration largely improves cell condition affected by cadmium. Although, we clearly demonstrate the beneficial feature of AsA, further studies are required to fully understand its protective nature on cell homeostasis maintenance under conditions of the broken environment.
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Affiliation(s)
- Alica Navrátilová
- Department of Genetics and Breeding Biology, Faculty of Agrobiology and Food Resources, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76, Nitra, Slovakia
| | - Marek Kovár
- Department of Plant Physiology, Faculty of Agrobiology and Food Resources, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76, Nitra, Slovakia
| | - Miroslava Požgajová
- AgroBioTech Research Centre, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76, Nitra, Slovakia.
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Trautmann A, Gascan H, Ghozzi R. Potential Patient-Reported Toxicities With Disulfiram Treatment in Late Disseminated Lyme Disease. Front Med (Lausanne) 2020; 7:133. [PMID: 32373619 PMCID: PMC7184924 DOI: 10.3389/fmed.2020.00133] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Accepted: 03/27/2020] [Indexed: 12/12/2022] Open
Abstract
Recently, disulfiram has been proposed as a promising treatment for people suffering from persistent symptoms of Lyme Disease. Disulfiram has several distinct molecular targets. The most well-known is alcohol dehydrogenase, a key enzyme for detoxifying the organism after alcohol ingestion. Other targets and modes of action of disulfiram, that may present problematic side effects, are less commonly mentioned. The French Federation against Tick Borne Diseases (French acronym, FFMVT), which associates three main Lyme patient organizations, MDs and PhDs, has recently been alerted to severe and persistent toxic events in a patient suffering from a late disseminated form of Lyme Disease following disulfiram intake. FFMVT reacted by launching a national call to examine whether other patients in France following a similar treatment could be identified, and what benefits, or side effects could be reported. The statements of 16 patients taking disulfiram have been collected and are presented here. Thirteen out of 16 patients reported toxic events, and seven out of 16 reported benefits for at least part of their symptoms. Based on the collected observations, it seems too early to promote disulfiram as a promising new treatment until the reasons underlying the reported toxicities have been explored, and the results of a well-conducted double blind clinical trial published. The importance of taking into account patient-reported outcomes in Lyme Disease is underlined by the present study.
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Affiliation(s)
- Alain Trautmann
- Université de Paris, Institut Cochin, INSERM U1016, CNRS UMR8104, Paris, France
| | - Hugues Gascan
- Institut de Génétique et Développement de Rennes (IGDR), Rennes, France
| | - Raouf Ghozzi
- Centre Hospitalier de Lannemezan, Lannemezan, France
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Teles GH, da Silva JM, Mendonça AA, de Morais Junior MA, de Barros Pita W. First aspects on acetate metabolism in the yeast Dekkera bruxellensis: a few keys for improving ethanol fermentation. Yeast 2018; 35:577-584. [PMID: 30006941 DOI: 10.1002/yea.3348] [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] [Received: 02/25/2018] [Revised: 04/25/2018] [Accepted: 05/23/2018] [Indexed: 11/10/2022] Open
Abstract
Dekkera bruxellensis is continuously changing its status in fermentation processes, ranging from a contaminant or spoiling yeast to a microorganism with potential to produce metabolites of biotechnological interest. In spite of that, several major aspects of its physiology are still poorly understood. As an acetogenic yeast, minimal oxygen concentrations are able to drive glucose assimilation to oxidative metabolism, in order to produce biomass and acetate, with consequent low yield in ethanol. In the present study, we used disulfiram to inhibit acetaldehyde dehydrogenase activity to evaluate the influence of cytosolic acetate on cell metabolism. D. bruxellensis was more tolerant to disulfiram than Saccharomyces cerevisiae and the use of different carbon sources revealed that the former yeast might be able to export acetate (or acetyl-CoA) from mitochondria to cytoplasm. Fermentation assays showed that acetaldehyde dehydrogenase inhibition re-oriented yeast central metabolism to increase ethanol production and decrease biomass formation. However, glucose uptake was reduced, which ultimately represents economical loss to the fermentation process. This might be the major challenge for future metabolic engineering enterprises on this yeast.
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Affiliation(s)
- Gilberto Henrique Teles
- Interdepartmental Research Group in Metabolic Engineering, Federal University of Pernambuco, Recife, PE, 50760-901, Brazil
| | - Jackeline Maria da Silva
- Interdepartmental Research Group in Metabolic Engineering, Federal University of Pernambuco, Recife, PE, 50760-901, Brazil
| | - Allyson Andrade Mendonça
- Interdepartmental Research Group in Metabolic Engineering, Federal University of Pernambuco, Recife, PE, 50760-901, Brazil
| | - Marcos Antonio de Morais Junior
- Interdepartmental Research Group in Metabolic Engineering, Federal University of Pernambuco, Recife, PE, 50760-901, Brazil.,Department of Genetics, Federal University of Pernambuco, Recife, PE, 50760-901, Brazil
| | - Will de Barros Pita
- Interdepartmental Research Group in Metabolic Engineering, Federal University of Pernambuco, Recife, PE, 50760-901, Brazil.,Department of Antibiotics, Federal University of Pernambuco, Recife, PE, 50760-901, Brazil
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Scariot FJ, Jahn L, Delamare APL, Echeverrigaray S. Necrotic cell death induced by dithianon on Saccharomyces cerevisiae. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2018; 149:137-142. [PMID: 30033009 DOI: 10.1016/j.pestbp.2018.06.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Revised: 05/11/2018] [Accepted: 06/13/2018] [Indexed: 06/08/2023]
Abstract
Dithianon is a broad-spectrum anthraquinone fungicide used to control several diseases of grapes, apples, and other fruits and vegetables. Its mode of action is described as multi-site and associated to thiol-reactivity. As other fungicides can affect non-phytopathogenic organisms as yeasts and bacteria, with impact on microbial population, diversity, and fermentation processes. In this context, we study the effect of dithianon on the model organism and fermentative yeast Saccharomyces cerevisiae in order to elucidate the mechanisms involved in yeast cell death., and explain its interference on wine fermentation kinetics. Thus for, we analyzed cellular protein and non-protein thiols, membrane and cell wall integrity, reactive oxygen species accumulation, mitochondrial membrane potential, and phosphatidylserine externalization. The results showed that when exponentially aerobic growing cells of S. cerevisiae are submitted to acute dithianon treatment they loss cell wall and membrane integrity, dying by necrosis, and this behavior is associated to a depletion of reduced proteic and non-proteic thiol groups. We also detected an important increase of cellular reactive oxygen species (ROS) associated to mitochondrial membrane potential modifications on dithianon treated cells. ROS accumulation was not associated to apoptotic cell death, but can be responsible for intracellular damages. Moreover, necrotic cell death induced by dithianon explains its effect on the kinetics of wine fermentations.
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Affiliation(s)
- Fernando J Scariot
- Institute of Biotechnology, University of Caxias do Sul, Rio Grande do Sul, Brazil
| | - Luciane Jahn
- Institute of Biotechnology, University of Caxias do Sul, Rio Grande do Sul, Brazil
| | - Ana Paula L Delamare
- Institute of Biotechnology, University of Caxias do Sul, Rio Grande do Sul, Brazil
| | - Sergio Echeverrigaray
- Institute of Biotechnology, University of Caxias do Sul, Rio Grande do Sul, Brazil; Cytogene Diagnósticos Moleculares Ltda., Lajeado, Rio Grande do Sul, Brazil.
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9
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Suppressing autophagy enhances disulfiram/copper-induced apoptosis in non-small cell lung cancer. Eur J Pharmacol 2018; 827:1-12. [DOI: 10.1016/j.ejphar.2018.02.039] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Revised: 02/26/2018] [Accepted: 02/27/2018] [Indexed: 12/21/2022]
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10
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Santos MMS, Elsztein C, De Souza RB, Paiva SDSL, Silva JA, Crovella S, De Morais MA. Respiratory deficiency in yeast mevalonate kinase deficient may explain MKD-associate metabolic disorder in humans. Curr Genet 2018; 64:871-881. [PMID: 29374778 DOI: 10.1007/s00294-018-0803-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 12/22/2017] [Accepted: 01/02/2018] [Indexed: 01/28/2023]
Abstract
Mevalonate kinase deficiency (MKD) an orphan drug rare disease affecting humans with different clinical presentations, is still lacking information about its pathogenesis; no animal or cell model mimicking the genetic defect, mutations at MVK gene, and its consequences on the mevalonate pathway is available. Trying to clarify the effects of MVK gene impairment on the mevalonate pathway we used a yeast model, the erg12-d mutant strain Saccharomyces cerevisiae (orthologous of MKV) retaining only 10% of mevalonate kinase (MK) activity, to describe the effects of reduced MK activity on the mevalonate pathway. Since shortage of isoprenoids has been described in MKD, we checked this observation using a physiologic approach: while normally growing on glucose, erg12-d showed growth deficiency in glycerol, a respirable carbon source, that was not rescued by supplementation with non-sterol isoprenoids, such as farnesol, geraniol nor geranylgeraniol, produced by the mevalonate pathway. Erg12-d whole genome expression analysis revealed specific downregulation of RSF2 gene encoding general transcription factor for respiratory genes, explaining the absence of growth on glycerol. Moreover, we observed the upregulation of genes involved in sulphur amino acids biosynthesis that coincided with the increasing in the amount of proteins containing sulfhydryl groups; upregulation of ubiquinone biosynthesis genes was also detected. Our findings demonstrated that the shortage of isoprenoids is not the main mechanism involved in the respiratory deficit and mitochondrial malfunctioning of MK-defective cells, while the scarcity of ubiquinone plays an important role, as already observed in MKD patients.
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Affiliation(s)
- Manuella Maria Silva Santos
- Interdepartmental Research Group in Metabolic Engineering, Federal University of Pernambuco, Avenida Moraes Rego, No. 1235, Recife, PE, 50760-901, Brazil
- Department of Genetics, Federal University of Pernambuco, Avenida Moraes Rego, No. 1235, Cidade Universitária, Recife, PE, 50760-901, Brazil
| | - Carolina Elsztein
- Interdepartmental Research Group in Metabolic Engineering, Federal University of Pernambuco, Avenida Moraes Rego, No. 1235, Recife, PE, 50760-901, Brazil
- Department of virology/CPqAM, Oswaldo Cruz Fundation, Avenida Moraes Rego, N/S, Recife, PE, 50760-901, Brazil
| | - Rafael Barros De Souza
- Interdepartmental Research Group in Metabolic Engineering, Federal University of Pernambuco, Avenida Moraes Rego, No. 1235, Recife, PE, 50760-901, Brazil
- Institute for Biologial Sciences, University of Pernambuco, Avenida Agamenon Magalhães, s/n, Recife, PE, 50100-010, Brazil
| | - Sérgio de Sá Leitão Paiva
- Laboratory of Bioinformatics and Evolutionary Biology, Federal Rural University Pernambuco, Rua Dom Manoel de Medeiros, s/n, Recife, PE, 52171-900, Brazil
| | - Jaqueline Azevêdo Silva
- Department of Genetics, Federal University of Pernambuco, Avenida Moraes Rego, No. 1235, Cidade Universitária, Recife, PE, 50760-901, Brazil
- Laboratory of Immunopathology Keizo Asami, Federal University of Pernambuco, Avenida Moraes Rego, No. 1235, Recife, PE, 50760-901, Brazil
| | - Sergio Crovella
- Department of Genetics, Federal University of Pernambuco, Avenida Moraes Rego, No. 1235, Cidade Universitária, Recife, PE, 50760-901, Brazil
- Laboratory of Immunopathology Keizo Asami, Federal University of Pernambuco, Avenida Moraes Rego, No. 1235, Recife, PE, 50760-901, Brazil
| | - Marcos Antonio De Morais
- Interdepartmental Research Group in Metabolic Engineering, Federal University of Pernambuco, Avenida Moraes Rego, No. 1235, Recife, PE, 50760-901, Brazil.
- Department of Genetics, Federal University of Pernambuco, Avenida Moraes Rego, No. 1235, Cidade Universitária, Recife, PE, 50760-901, Brazil.
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11
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Antioxidant activity of thermal or non-thermally treated strawberry and mango juices by Saccharomyces cerevisiae growth based assays. Lebensm Wiss Technol 2016. [DOI: 10.1016/j.lwt.2016.07.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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12
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Tillmann AT, Strijbis K, Cameron G, Radmaneshfar E, Thiel M, Munro CA, MacCallum DM, Distel B, Gow NAR, Brown AJP. Contribution of Fdh3 and Glr1 to Glutathione Redox State, Stress Adaptation and Virulence in Candida albicans. PLoS One 2015; 10:e0126940. [PMID: 26039593 PMCID: PMC4454436 DOI: 10.1371/journal.pone.0126940] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Accepted: 04/09/2015] [Indexed: 01/04/2023] Open
Abstract
The major fungal pathogen of humans, Candida albicans, is exposed to reactive nitrogen and oxygen species following phagocytosis by host immune cells. In response to these toxins, this fungus activates potent anti-stress responses that include scavenging of reactive nitrosative and oxidative species via the glutathione system. Here we examine the differential roles of two glutathione recycling enzymes in redox homeostasis, stress adaptation and virulence in C. albicans: glutathione reductase (Glr1) and the S-nitrosoglutathione reductase (GSNOR), Fdh3. We show that the NADPH-dependent Glr1 recycles GSSG to GSH, is induced in response to oxidative stress and is required for resistance to macrophage killing. GLR1 deletion increases the sensitivity of C. albicans cells to H2O2, but not to formaldehyde or NO. In contrast, Fdh3 detoxifies GSNO to GSSG and NH3, and FDH3 inactivation delays NO adaptation and increases NO sensitivity. C. albicans fdh3⎔ cells are also sensitive to formaldehyde, suggesting that Fdh3 also contributes to formaldehyde detoxification. FDH3 is induced in response to nitrosative, oxidative and formaldehyde stress, and fdh3Δ cells are more sensitive to killing by macrophages. Both Glr1 and Fdh3 contribute to virulence in the Galleria mellonella and mouse models of systemic infection. We conclude that Glr1 and Fdh3 play differential roles during the adaptation of C. albicans cells to oxidative, nitrosative and formaldehyde stress, and hence during the colonisation of the host. Our findings emphasise the importance of the glutathione system and the maintenance of intracellular redox homeostasis in this major pathogen.
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Affiliation(s)
- Anna T Tillmann
- Aberdeen Fungal Group, School of Medical Sciences, Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Karin Strijbis
- Department of Medical Biochemistry, Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands
| | - Gary Cameron
- Division of Applied Medicine, Mass Spectrometry Section, University of Aberdeen, Aberdeen, United Kingdom
| | - Elahe Radmaneshfar
- Institute for Complex Systems and Mathematical Biology, SUPA, University of Aberdeen, Aberdeen, United Kingdom
| | - Marco Thiel
- Institute for Complex Systems and Mathematical Biology, SUPA, University of Aberdeen, Aberdeen, United Kingdom
| | - Carol A Munro
- Aberdeen Fungal Group, School of Medical Sciences, Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Donna M MacCallum
- Aberdeen Fungal Group, School of Medical Sciences, Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Ben Distel
- Department of Medical Biochemistry, Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands
| | - Neil A R Gow
- Aberdeen Fungal Group, School of Medical Sciences, Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Alistair J P Brown
- Aberdeen Fungal Group, School of Medical Sciences, Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
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13
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Ikeda S, Senoo T, Kawano S, Tamura S, Shinozuka Y, Sugishita S. Suppressive Effects of Natural Compounds on Methionine Auxotrophy of a Cu,Zn-Superoxide Dismutase-Deficient Mutant of <i>Saccharomyces cerevisiae</i>. FOOD SCIENCE AND TECHNOLOGY RESEARCH 2015. [DOI: 10.3136/fstr.21.137] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Shogo Ikeda
- Department of Biochemistry, Faculty of Science, Okayama University of Science
| | - Takanori Senoo
- Department of Biochemistry, Faculty of Science, Okayama University of Science
| | - Shinji Kawano
- Department of Biochemistry, Faculty of Science, Okayama University of Science
| | - Sayaka Tamura
- Department of Biochemistry, Faculty of Science, Okayama University of Science
| | - Yuki Shinozuka
- Department of Biochemistry, Faculty of Science, Okayama University of Science
| | - Shihori Sugishita
- Department of Biochemistry, Faculty of Science, Okayama University of Science
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14
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Diethyldithiocarbamate complexes with metals used as food supplements show different effects in cancer cells. J Appl Biomed 2014. [DOI: 10.1016/j.jab.2014.04.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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Kwolek-Mirek M, Zadrag-Tecza R. Comparison of methods used for assessing the viability and vitality of yeast cells. FEMS Yeast Res 2014; 14:1068-79. [DOI: 10.1111/1567-1364.12202] [Citation(s) in RCA: 130] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Revised: 08/19/2014] [Accepted: 08/20/2014] [Indexed: 11/28/2022] Open
Affiliation(s)
| | - Renata Zadrag-Tecza
- Department of Biochemistry and Cell Biology; University of Rzeszow; Rzeszow Poland
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Soares FA, Sesti-Costa R, da Silva JS, de Souza MCB, Ferreira VF, da C. Santos F, Monteiro PA, Leitão A, Montanari CA. Molecular design, synthesis and biological evaluation of 1,4-dihydro-4-oxoquinoline ribonucleosides as TcGAPDH inhibitors with trypanocidal activity. Bioorg Med Chem Lett 2013; 23:4597-601. [DOI: 10.1016/j.bmcl.2013.06.029] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2013] [Revised: 06/05/2013] [Accepted: 06/11/2013] [Indexed: 10/26/2022]
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Antibacterial activity of CTBT (7-chlorotetrazolo[5,1-c]benzo[1,2,4]triazine) generating reactive oxygen species. Microbiol Res 2013. [DOI: 10.1016/j.micres.2012.10.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Nagira K, Tamura S, Kawano S, Ikeda S. Ascorbic Acid and Thiol Antioxidants Suppress Spontaneous Mutagenesis in a Cu,Zn-superoxide Dismutase-deficient Mutant of Saccharomyces cerevisiae. Genes Environ 2013. [DOI: 10.3123/jemsge.2013.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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