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Talbi W, Ghazouani T, Braconi D, Ben Abdallah R, Raboudi F, Santucci A, Fattouch S. Effects of selenium on oxidative damage and antioxidant enzymes of eukaryotic cells: wine Saccharomyces cerevisiae. J Appl Microbiol 2018; 126:555-566. [PMID: 30408278 DOI: 10.1111/jam.14150] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 10/20/2018] [Accepted: 10/29/2018] [Indexed: 01/10/2023]
Abstract
AIM To clarify the effects of selenium (Se), parameters related to oxidative issues, as well as the antioxidant response were investigated on an autochthonous wine yeast strain. METHODS AND RESULTS Antioxidant enzyme activity, gel electrophoresis, Western blot and MDA level were used to investigate the effects of different concentration of Se in wine yeast. We found that Se is able to affect the enzymatic activities of catalase (CAT), glutathione peroxidase (GPx) and superoxide dismutase (SOD). An increase in lipid peroxidation was observed in a dose-dependent manner of (Se), thus, indicating the occurrence of cell membrane damage. Additionally, Se induced post-translational oxidative modifications of proteins, especially oxidation of thiol groups (both reversible and irreversible) and protein carbonylation (irreversible oxidation). CONCLUSION These results obtained could further the understanding the effect of different concentration of Se in wine yeast strain with which Se affect the enzymatic activities and induces some post-translational modifications of proteins. SIGNIFICANCE AND IMPACT OF THE STUDY The understanding of mechanisms regulating the response of wine yeast to Se is important for future work using selenized yeast as enriched Se supplements in human nutrition.
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Affiliation(s)
- W Talbi
- Department of Chemical and Biological Engineering, National Institute of Applied Sciences and Technology (INSAT), Tunis, Tunisia.,Faculty of Sciences of Bizerte, University of Carthage, Tunis, Tunisia
| | - T Ghazouani
- Department of Chemical and Biological Engineering, National Institute of Applied Sciences and Technology (INSAT), Tunis, Tunisia
| | - D Braconi
- Dipartimento di Biotecnologie, Università degli Studi di Siena, Siena, Italy
| | - R Ben Abdallah
- Department of Chemical and Biological Engineering, National Institute of Applied Sciences and Technology (INSAT), Tunis, Tunisia
| | - F Raboudi
- ISAJC, Bir El Bey, University of Tunis, Tunis, Tunisia
| | - A Santucci
- Dipartimento di Biotecnologie, Università degli Studi di Siena, Siena, Italy
| | - S Fattouch
- Department of Chemical and Biological Engineering, National Institute of Applied Sciences and Technology (INSAT), Tunis, Tunisia
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Braconi D, Bernardini G, Possenti S, Laschi M, Arena S, Scaloni A, Geminiani M, Sotgiu M, Santucci A. Proteomics and redox-proteomics of the effects of herbicides on a wild-type wine Saccharomyces cerevisiae strain. J Proteome Res 2009; 8:256-67. [PMID: 19032026 DOI: 10.1021/pr800372q] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Several toxicological and environmental problems are associated with the extensive use of agricultural pesticides, such as herbicides. Nevertheless, little is known about the toxic effects of formulated herbicides, since many studies have been carried out using pure active molecules alone. In this work, we used as an eukaryotic model system an autochthonous wine yeast strain to investigate the effects of three commercial herbicides, currently used in the same geographical area from where this strain had been isolated. We carried out a comparative proteomic analysis to study the effects at the protein level of the herbicide-related stress, and found that the herbicides tested can alter the yeast proteome producing responses that share homologies with those observed treating yeast cells with the herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) or with well-known oxidizing agents. We evaluated, through redox-proteomic techniques, protein carbonylation as a biomarker of oxidative stress. This analysis showed that herbicide-induced carbonylation is a dynamic phenomenon with degrees of selectivity.
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Affiliation(s)
- Daniela Braconi
- Dipartimento di Biologia Molecolare, Universita degli Studi di Siena, via Fiorentina 1, Siena, Italy
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Braconi D, Sotgiu M, Millucci L, Paffetti A, Tasso F, Alisi C, Martini S, Rappuoli R, Lusini P, Sprocati AR, Rossi C, Santucci A. Comparative analysis of the effects of locally used herbicides and their active ingredients on a wild-type wine Saccharomyces cerevisiae strain. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2006; 54:3163-72. [PMID: 16608247 DOI: 10.1021/jf052453z] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Herbicides are released to the environment with potential ecotoxicological risks for mammals. Yeast is a good model to elucidate toxicity mechanisms. We investigated how three commercial herbicides (Proper Energy, Pointer, and Silglif) and their active ingredients (respectively, fenoxaprop-P-ethyl, tribenuron methyl, and glyphosate) can affect biological activities of an oenological Saccharomyces cerevisiae strain, which may be resident on grape vineyards of the same geographical areas where herbicides are used. The use of commercial grade herbicides employed in Italy allowed us to reproduce the same conditions applied in crops; at the same time, assaying pure single active compounds made it possible to compare the effects obtained with commercial formulations. Interestingly, we found that while pure active compounds affect cell growth and metabolism at a lower extent, commercial preparations have a significant major negative influence on yeast biology.
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Affiliation(s)
- Daniela Braconi
- Dipartimento di Biologia Molecolare, Università degli Studi di Siena, via Fiorentina 1, 53100, Siena, Italy
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Martini S, Ricci M, Bartolini F, Bonechi C, Braconi D, Millucci L, Santucci A, Rossi C. Metabolic response to exogenous ethanol in yeast: An in vivo NMR and mathematical modelling approach. Biophys Chem 2006; 120:135-42. [PMID: 16316719 DOI: 10.1016/j.bpc.2005.10.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2005] [Revised: 10/10/2005] [Accepted: 10/14/2005] [Indexed: 11/18/2022]
Abstract
The understanding of the metabolic behaviour of complex systems such as eukaryotic cells needs the development of new approaches that are able to deal with the complexity due to a large number of interactions within the system. In this paper, we applied an approach based on the combined use of in vivo NMR experiments and mathematical modelling in order to analyze the metabolic response to ethanol stress in a wild-strain of Saccharomyces cerevisiae. Considering the cellular metabolic processes resulting from activation, inhibition, and feed-back activities, we developed a model able to describe the modulation of the whole system induced by an external stress due to increasing concentrations of exogenous ethanol. This approach was able to interpret the experimental results in terms of metabolic response to exogenous ethanol in the yeast. The robustness and flexibility of the model enables it to work correctly at different initial exogenous ethanol concentrations.
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Affiliation(s)
- Silvia Martini
- Dipartimento di Scienze e Tecnologie Chimiche e dei Biosistemi, Università di Siena Via Aldo Moro, 2-53100 Siena, Italy
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Mini R, Annibale B, Lahner E, Bernardini G, Figura N, Santucci A. Western blotting of total lysate of Helicobacter pylori in cases of atrophic body gastritis. Clin Chem 2006; 52:220-6. [PMID: 16306089 DOI: 10.1373/clinchem.2005.054627] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
BACKGROUND Atrophic body gastritis is considered the first important step in the histogenesis of gastric carcinoma, a multistep process starting from chronic gastritis and progressing through chronic atrophic gastritis, intestinal metaplasia, and dysplasia. Helicobacter pylori is involved in the induction of atrophic body gastritis, but documentation of H. pylori infection is difficult because of the progressive disappearance of the bacterium. Our study aimed to detect past H. pylori infection in patients with atrophic body gastritis. METHODS We used Western blot analyses of whole bacterial protein lysate of 2 different strains to probe sera from 143 patients. All sera were analyzed by ELISA (Bio-Rad), and results of gastric histology were available for all patients. RESULTS Among 111 patient sera previously classified as negative for H. pylori infection by ELISA, 106 (95.5%) were positive when assayed by immunoblotting. CONCLUSIONS Commercial diagnostic reagent sets may fail to detect H. pylori infection. Western blotting of whole bacterial protein extracts could provide the basis of a noninvasive serology tool able to assess previous infection with H. pylori in patients with atrophic body gastritis.
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Affiliation(s)
- Roberta Mini
- Dipartimento di Biologia Molecolare, Policlinico Le Scotte, Università degli Studi di Siena, Siena, Italy
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Mini R, Figura N, D'Ambrosio C, Braconi D, Bernardini G, Di Simplicio F, Lenzi C, Nuti R, Trabalzini L, Martelli P, Bovalini L, Scaloni A, Santucci A. Helicobacter pylori immunoproteomes in case reports of rosacea and chronic urticaria. Proteomics 2005; 5:777-87. [PMID: 15668992 DOI: 10.1002/pmic.200401094] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Rosacea and chronic urticaria are two common skin disorders existing in idiopathic forms. A role of Helicobacter pylori bacterium infection in the aetiopathogenesis of rosacea or chronic urticaria has been suggested although still controversial. The aim of the present study was to establish a relationship between H. pylori infection and rosacea chronic urticaria by means of an immunoproteomic investigation. We analyzed immunoglobulin A (IgA)-, IgG-, and IgE-mediated immune-responses against H. pylori antigens and we identified some bacterial immunoresponsive proteins. A general IgA- and IgE-mediated immune response against antioxidative bacterial proteins was observed. A correlation between the bacterial occurrence and skin diseases pathogenesis is discussed.
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Affiliation(s)
- Roberta Mini
- Dipartimento di Biologia Molecolare, Università degli Studi di Siena, Siena, Italy
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Figura N, Trabalzini L, Mini R, Bernardini G, Scaloni A, Talamo F, Lusini P, Ferro E, Martelli P, Santucci A. Inactivation of Helicobacter pylori cagA gene affects motility. Helicobacter 2004; 9:185-93. [PMID: 15165253 DOI: 10.1111/j.1083-4389.2004.00224.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Abstract
BACKGROUND The cytotoxin-associated protein CagA is a Helicobacter pylori immunodominant antigen whose gene resides in the cag pathogenicity island. Our purpose was to determine if the disruption or deletion of cagA gene could have an effect on the expression of other proteins at the proteome level. We analyzed two H. pylori strains, 328 and G27 wild-type, bearing the cag pathogenicity island, and their respective isogenic cagA(-) mutants. METHODS The proteomes of two H. pylori strains (328 and its isogenic mutant SPM328_DeltacagA) were resolved by two-dimensional electrophoresis and the digitalized images obtained were analysed both quantitatively and qualitatively. Peculiar spots of each strain were identified by mass spectrometry or by Western blotting. RESULTS The comparison between the proteome expression of an H. pylori cagA(+) strain and an isogenic mutant strain where the cagA gene was disrupted showed that, as well as the lack of expression of CagA, both flagellin A and flagellin B expressions were significantly decreased. The cagA(-) isogenic mutant was nonmotile. G27_DeltacagA, in which CagA was inactivated by gene deletion, was nonmotile as well respecting to motile G27 wild-type strain. Moreover, reintroduction of cagA in G27_DeltacagA restored motility. CONCLUSIONS Our results suggest that CagA could quantitatively influence flaA and flaB transcription or their subsequent translation and/or correct folding.
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Affiliation(s)
- Natale Figura
- Dipartimento di Medicina Interna, Scienze Endocrino-Metaboliche e Biochimica, Policlinico Le Scotte, 53100 Siena, Italy
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Martini S, Ricci M, Bonechi C, Trabalzini L, Santucci A, Rossi C. In vivo13C-NMR and modelling study of metabolic yield response to ethanol stress in a wild-type strain ofSaccharomyces cerevisiae. FEBS Lett 2004; 564:63-8. [PMID: 15094043 DOI: 10.1016/s0014-5793(04)00316-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2004] [Accepted: 03/05/2004] [Indexed: 11/17/2022]
Abstract
In this paper the combined use of in vivo (13)C-nuclear magnetic resonance spectroscopy and mathematical modelling allowed the analysis of the response to ethanol stress in a wild-type strain of Saccharomyces cerevisiae, in terms of a reduced metabolic activity. The model developed succeeded in describing and interpreting the effects of increasing concentrations of exogenous ethanol. In particular, the ratio between the kinetic constants associated with ethanol production and glucose consumption gave the estimation of the metabolic yield of the processes in perfect agreement with experimental results.
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Affiliation(s)
- Silvia Martini
- Dipartimento di Scienze e Tecnologie Chimiche e dei Biosistemi, Università di Siena, Via Aldo Moro 2, 53100 Siena, Italy
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Inhibition effects of ethanol on the kinetics of glucose metabolism by S. cerevisiae: NMR and modelling study. Chem Phys Lett 2004. [DOI: 10.1016/j.cplett.2004.02.041] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Trabalzini L, Paffetti A, Scaloni A, Talamo F, Ferro E, Coratza G, Bovalini L, Lusini P, Martelli P, Santucci A. Proteomic response to physiological fermentation stresses in a wild-type wine strain of Saccharomyces cerevisiae. Biochem J 2003; 370:35-46. [PMID: 12401115 PMCID: PMC1223135 DOI: 10.1042/bj20020140] [Citation(s) in RCA: 79] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2002] [Revised: 10/15/2002] [Accepted: 10/25/2002] [Indexed: 11/17/2022]
Abstract
We report a study on the adaptive response of a wild-type wine Saccharomyces cerevisiae strain, isolated from natural spontaneous grape must, to mild and progressive physiological stresses due to fermentation. We observed by two-dimensional electrophoresis how the yeast proteome changes during glucose exhaustion, before the cell enters its complete stationary phase. On the basis of their identification, the proteins representing the S. cerevisiae proteomic response to fermentation stresses were divided into three classes: repressed proteins, induced proteins and autoproteolysed proteins. In an overall view, the proteome adaptation of S. cerevisiae at the time of glucose exhaustion seems to be directed mainly against the effects of ethanol, causing both hyperosmolarity and oxidative responses. Stress-induced autoproteolysis is directed mainly towards specific isoforms of glycolytic enzymes. Through the use of a wild-type S. cerevisiae strain and PMSF, a specific inhibitor of vacuolar proteinase B, we could also distinguish the specific contributions of the vacuole and the proteasome to the autoproteolytic process.
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Affiliation(s)
- Lorenza Trabalzini
- Dipartimento di Biologia Molecolare, Università degli Studi di Siena, via Fiorentina 1, 53100 Siena, Italy
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Current Awareness. Yeast 2001. [DOI: 10.1002/yea.683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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Current Awareness on Comparative and Functional Genomics. Comp Funct Genomics 2001. [PMCID: PMC2447210 DOI: 10.1002/cfg.57] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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