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Meng L, Liu C, Li Y, Chen G, Xiong M, Yu T, Pan L, Zhang X, Zhou L, Guo T, Yuan X, Liu C, Zhang Z, Zhang Z. The yeast prion protein Sup35 initiates α-synuclein pathology in mouse models of Parkinson's disease. SCIENCE ADVANCES 2023; 9:eadj1092. [PMID: 37910610 PMCID: PMC10619926 DOI: 10.1126/sciadv.adj1092] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Accepted: 09/29/2023] [Indexed: 11/03/2023]
Abstract
Parkinson's disease (PD) is characterized by the pathologic aggregation and prion-like propagation of α-synuclein (α-syn). Emerging evidence shows that fungal infections increase the incidence of PD. However, the molecular mechanisms by which fungi promote the onset of PD are poorly understood. Here, we show that nasal infection with Saccharomyces cerevisiae (S. cerevisiae) in α-syn A53T transgenic mice accelerates the aggregation of α-syn. Furthermore, we found that Sup35, a prion protein from S. cerevisiae, is the key factor initiating α-syn pathology induced by S. cerevisiae. Sup35 interacts with α-syn and accelerates its aggregation in vitro. Notably, injection of Sup35 fibrils into the striatum of wild-type mice led to α-syn pathology and PD-like motor impairment. The Sup35-seeded α-syn fibrils showed enhanced seeding activity and neurotoxicity compared with pure α-syn fibrils in vitro and in vivo. Together, these observations indicate that the yeast prion protein Sup35 initiates α-syn pathology in PD.
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Affiliation(s)
- Lanxia Meng
- Department of Neurology, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Congcong Liu
- Department of Neurology, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Yiming Li
- Department of Neurology, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Guiqin Chen
- Department of Neurology, Renmin Hospital of Wuhan University, Wuhan 430060, China
- Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Min Xiong
- Department of Neurology, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Ting Yu
- Department of Neurology, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Lina Pan
- Department of Neurology, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Xingyu Zhang
- Department of Neurology, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Lingyan Zhou
- Department of Neurology, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Tao Guo
- Department of Neurology, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Xin Yuan
- Department of Neurology, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Chaoyang Liu
- Department of Neurology, Renmin Hospital of Wuhan University, Wuhan 430060, China
- Research Center for Environment and Health, Zhongnan University of Economics and Law, Wuhan 430073, China
| | - Zhaohui Zhang
- Department of Neurology, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Zhentao Zhang
- Department of Neurology, Renmin Hospital of Wuhan University, Wuhan 430060, China
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2
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Postaru M, Tucaliuc A, Cascaval D, Galaction AI. Cellular Stress Impact on Yeast Activity in Biotechnological Processes-A Short Overview. Microorganisms 2023; 11:2522. [PMID: 37894181 PMCID: PMC10609598 DOI: 10.3390/microorganisms11102522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 09/28/2023] [Accepted: 10/05/2023] [Indexed: 10/29/2023] Open
Abstract
The importance of Saccharomyces cerevisiae yeast cells is known worldwide, as they are the most used microorganisms in biotechnology for bioethanol and biofuel production. Also, they are analyzed and studied for their similar internal biochemical processes to human cells, for a better understanding of cell aging and response to cell stressors. The special ability of S. cerevisiae cells to develop in both aerobic and anaerobic conditions makes this microorganism a viable model to study the transformations and the way in which cellular metabolism is directed to face the stress conditions due to environmental changes. Thus, this review will emphasize the effects of oxidative, ethanol, and osmotic stress and also the physiological and genetic response of stress mitigation in yeast cells.
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Affiliation(s)
- Madalina Postaru
- Department of Biomedical Science, Faculty of Medical Bioengineering, “Grigore T. Popa” University of Medicine and Pharmacy of Iasi, M. Kogălniceanu 9-13, 700454 Iasi, Romania;
| | - Alexandra Tucaliuc
- Department of Organic, Biochemical and Food, “Cristofor Simionescu” Faculty of Chemical, Engineering and Environmental Protection, Engineering, “Gheorghe Asachi” Technical University of Iasi, D. Mangeron 73, 700050 Iasi, Romania; (A.T.); (D.C.)
| | - Dan Cascaval
- Department of Organic, Biochemical and Food, “Cristofor Simionescu” Faculty of Chemical, Engineering and Environmental Protection, Engineering, “Gheorghe Asachi” Technical University of Iasi, D. Mangeron 73, 700050 Iasi, Romania; (A.T.); (D.C.)
| | - Anca-Irina Galaction
- Department of Biomedical Science, Faculty of Medical Bioengineering, “Grigore T. Popa” University of Medicine and Pharmacy of Iasi, M. Kogălniceanu 9-13, 700454 Iasi, Romania;
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3
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Alings F, Scharmann K, Eggers C, Böttcher B, Sokołowski M, Shvetsova E, Sharma P, Roth J, Rashiti L, Glatt S, Brunke S, Leidel SA. Ncs2* mediates in vivo virulence of pathogenic yeast through sulphur modification of cytoplasmic transfer RNA. Nucleic Acids Res 2023; 51:8133-8149. [PMID: 37462076 PMCID: PMC10450187 DOI: 10.1093/nar/gkad564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 05/30/2023] [Accepted: 06/21/2023] [Indexed: 08/26/2023] Open
Abstract
Fungal pathogens threaten ecosystems and human health. Understanding the molecular basis of their virulence is key to develop new treatment strategies. Here, we characterize NCS2*, a point mutation identified in a clinical baker's yeast isolate. Ncs2 is essential for 2-thiolation of tRNA and the NCS2* mutation leads to increased thiolation at body temperature. NCS2* yeast exhibits enhanced fitness when grown at elevated temperatures or when exposed to oxidative stress, inhibition of nutrient signalling, and cell-wall stress. Importantly, Ncs2* alters the interaction and stability of the thiolase complex likely mediated by nucleotide binding. The absence of 2-thiolation abrogates the in vivo virulence of pathogenic baker's yeast in infected mice. Finally, hypomodification triggers changes in colony morphology and hyphae formation in the common commensal pathogen Candida albicans resulting in decreased virulence in a human cell culture model. These findings demonstrate that 2-thiolation of tRNA acts as a key mediator of fungal virulence and reveal new mechanistic insights into the function of the highly conserved tRNA-thiolase complex.
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Affiliation(s)
- Fiona Alings
- Max Planck Research Group for RNA Biology, Max Planck Institute for Molecular Biomedicine, Muenster, Germany
| | - Karin Scharmann
- Max Planck Research Group for RNA Biology, Max Planck Institute for Molecular Biomedicine, Muenster, Germany
| | - Cristian Eggers
- Max Planck Research Group for RNA Biology, Max Planck Institute for Molecular Biomedicine, Muenster, Germany
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Bern, Switzerland
- Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland
| | - Bettina Böttcher
- Department of Microbial Pathogenicity Mechanisms, Leibniz Institute for Natural Product Research and Infection Biology - Hans Knoell Institute, Jena, Germany
- Septomics Research Center, Friedrich Schiller University and Leibniz Institute for Natural Product Research and Infection Biology - Hans Knoell Institute, Jena, Germany
| | - Mikołaj Sokołowski
- Max Planck Research Group at the Malopolska Centre of Biotechnology, Jagiellonian University, Krakow, Poland
| | - Ekaterina Shvetsova
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Bern, Switzerland
- Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland
| | - Puneet Sharma
- Max Planck Research Group for RNA Biology, Max Planck Institute for Molecular Biomedicine, Muenster, Germany
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Bern, Switzerland
| | - Joël Roth
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Bern, Switzerland
| | - Leon Rashiti
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Bern, Switzerland
| | - Sebastian Glatt
- Max Planck Research Group at the Malopolska Centre of Biotechnology, Jagiellonian University, Krakow, Poland
| | - Sascha Brunke
- Department of Microbial Pathogenicity Mechanisms, Leibniz Institute for Natural Product Research and Infection Biology - Hans Knoell Institute, Jena, Germany
| | - Sebastian A Leidel
- Max Planck Research Group for RNA Biology, Max Planck Institute for Molecular Biomedicine, Muenster, Germany
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Bern, Switzerland
- Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland
- Multidisciplinary Center for Infectious Diseases, University of Bern, Bern, Switzerland
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4
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Morard M, Pérez-Través L, Perpiñá C, Lairón-Peris M, Collado MC, Pérez-Torrado R, Querol A. Comparative genomics of infective Saccharomyces cerevisiae strains reveals their food origin. Sci Rep 2023; 13:10435. [PMID: 37369738 DOI: 10.1038/s41598-023-36857-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Accepted: 06/11/2023] [Indexed: 06/29/2023] Open
Abstract
Fungal infections are less studied than viral or bacterial infections and often more difficult to treat. Saccharomyces cerevisiae is usually identified as an innocuous human-friendly yeast; however, this yeast can be responsible for infections mainly in immunosuppressed individuals. S. cerevisiae is a relevant organism widely used in the food industry. Therefore, the study of food yeasts as the source of clinical infection is becoming a pivotal question for food safety. In this study, we demonstrate that S. cerevisiae strains cause infections to spread mostly from food environments. Phylogenetic analysis, genome structure analysis, and phenotypic characterization showed that the key sources of the infective strains are food products, such as bread and probiotic supplements. We observed that the adaptation to host infection can drive important phenotypic and genomic changes in these strains that could be good markers to determine the source of infection. These conclusions add pivotal evidence to reinforce the need for surveillance of food-related S. cerevisiae strains as potential opportunistic pathogens.
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Affiliation(s)
- Miguel Morard
- Departamento de Biotecnología, Instituto de Agroquímica y Tecnología de los Alimentos (IATA), CSIC, Valencia, Spain
| | - Laura Pérez-Través
- Departamento de Biotecnología, Instituto de Agroquímica y Tecnología de los Alimentos (IATA), CSIC, Valencia, Spain
| | - Carla Perpiñá
- Departamento de Biotecnología, Instituto de Agroquímica y Tecnología de los Alimentos (IATA), CSIC, Valencia, Spain
| | - María Lairón-Peris
- Departamento de Biotecnología, Instituto de Agroquímica y Tecnología de los Alimentos (IATA), CSIC, Valencia, Spain
| | - María Carmen Collado
- Departamento de Biotecnología, Instituto de Agroquímica y Tecnología de los Alimentos (IATA), CSIC, Valencia, Spain
| | - Roberto Pérez-Torrado
- Departamento de Biotecnología, Instituto de Agroquímica y Tecnología de los Alimentos (IATA), CSIC, Valencia, Spain
| | - Amparo Querol
- Departamento de Biotecnología, Instituto de Agroquímica y Tecnología de los Alimentos (IATA), CSIC, Valencia, Spain.
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5
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Jordá T, Martínez-Martín A, Martínez-Pastor MT, Puig S. Modulation of yeast Erg1 expression and terbinafine susceptibility by iron bioavailability. Microb Biotechnol 2022; 15:2705-2716. [PMID: 35837730 PMCID: PMC9618313 DOI: 10.1111/1751-7915.14102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 06/01/2022] [Accepted: 06/03/2022] [Indexed: 11/28/2022] Open
Abstract
Ergosterol is a specific sterol component of yeast and fungal membranes. Its biosynthesis is one of the most effective targets for antifungal treatments. However, the emergent resistance to multiple sterol‐based antifungal drugs emphasizes the need for new therapeutic approaches. The allylamine terbinafine, which selectively inhibits squalene epoxidase Erg1 within the ergosterol biosynthetic pathway, is mainly used to treat dermatomycoses, whereas its effectiveness in other fungal infections is limited. Given that ergosterol biosynthesis depends on iron as an essential cofactor, in this report, we used the yeast Saccharomyces cerevisiae to investigate how iron bioavailability influences Erg1 expression and terbinafine susceptibility. We observed that both chemical and genetic depletion of iron decrease ERG1 expression, leading to an increase in terbinafine susceptibility. Deletion of either ROX1 transcriptional repressor or CTH1 and CTH2 post‐transcriptional repressors of ERG1 expression led to an increase in Erg1 protein levels and terbinafine resistance. On the contrary, overexpression of CTH2 led to the opposite effect, lowering Erg1 levels and increasing terbinafine susceptibility. Although strain‐specific particularities exist, opportunistic pathogenic strains of S. cerevisiae displayed a response similar to the laboratory strain. These data indicate that iron bioavailability and particular regulatory factors could be used to modulate susceptibility to terbinafine.
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Affiliation(s)
- Tania Jordá
- Departamento de Biotecnología, Instituto de Agroquímica y Tecnología de Alimentos (IATA), Consejo Superior de Investigaciones Científicas (CSIC), Paterna, Valencia, Spain
| | - Ana Martínez-Martín
- Departamento de Biotecnología, Instituto de Agroquímica y Tecnología de Alimentos (IATA), Consejo Superior de Investigaciones Científicas (CSIC), Paterna, Valencia, Spain
| | | | - Sergi Puig
- Departamento de Biotecnología, Instituto de Agroquímica y Tecnología de Alimentos (IATA), Consejo Superior de Investigaciones Científicas (CSIC), Paterna, Valencia, Spain
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6
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Virulence Factors and in-Host Selection on Phenotypes in Infectious Probiotic Yeast Isolates ( Saccharomyces 'boulardii'). J Fungi (Basel) 2021; 7:jof7090746. [PMID: 34575784 PMCID: PMC8472476 DOI: 10.3390/jof7090746] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 09/07/2021] [Accepted: 09/09/2021] [Indexed: 12/27/2022] Open
Abstract
Saccharomyces yeast probiotics (S. ‘boulardii’) have long been applied in the treatment of several gastrointestinal conditions. Despite their widespread use, they are rare opportunistic pathogens responsible for a high proportion of Saccharomyces mycosis cases. The potential virulence attributes of S. ‘boulardii’ as well as its interactions with the human immune system have been studied, however, no information is available on how these yeasts may change due to in-host evolution. To fill this gap, we compared the general phenotypic characteristics, cell morphology, virulence factors, epithelial and immunological interactions, and pathogenicity of four probiotic product samples, two mycosis, and eight non-mycosis samples of S. ‘boulardii’. We assessed the characteristics related to major steps of yeast infections. Mycosis and non-mycosis isolates both displayed novel characters when compared to the product isolates, but in the case of most virulence factors and in pathogenicity, differences were negligible or, surprisingly, the yeasts from products showed elevated levels. No isolates inflicted considerable damage to the epithelial model or bore the hallmarks of immune evasion. Our results show that strains in probiotic products possess characteristics that enable them to act as pathogens upon permissive conditions, and their entry into the bloodstream is not due to active mechanisms but depends on the host. Survival in the host is dependent on yeast phenotypic characteristics which may change in many ways once they start evolving in the host. These facts call attention to the shortcomings of virulence phenotyping in yeast research, and the need for a more thorough assessment of probiotic use.
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7
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Virulence related traits in yeast species associated with food; Debaryomyces hansenii, Kluyveromyces marxianus, and Wickerhamomyces anomalus. Food Control 2021. [DOI: 10.1016/j.foodcont.2021.107901] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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8
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Chen YR, Ziv I, Swaminathan K, Elias JE, Jarosz DF. Protein aggregation and the evolution of stress resistance in clinical yeast. Philos Trans R Soc Lond B Biol Sci 2021; 376:20200127. [PMID: 33866806 DOI: 10.1098/rstb.2020.0127] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Protein aggregation, particularly in its prion-like form, has long been thought to be detrimental. However, recent studies have identified multiple instances where protein aggregation is important for normal physiological functions. Combining mass spectrometry and cell biological approaches, we developed a strategy for the identification of protein aggregates in cell lysates. We used this approach to characterize prion-based traits in pathogenic strains of the yeast Saccharomyces cerevisiae isolated from immunocompromised human patients. The proteins that we found, including the metabolic enzyme Cdc19, the translation elongation factor Yef3 and the fibrillarin homologue Nop1, are known to assemble under certain physiological conditions. Yet, such assemblies have not been reported to be stable or heritable. Our data suggest that some proteins which aggregate in response to stress have the capacity to acquire diverse assembled states, certain ones of which can be propagated across generations in a form of protein-based epigenetics. This article is part of the theme issue 'How does epigenetics influence the course of evolution?'
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Affiliation(s)
- Yiwen R Chen
- Department of Chemical and Systems Biology, Stanford University, Stanford, CA 94305, USA
| | - Inbal Ziv
- Department of Chemical and Systems Biology, Stanford University, Stanford, CA 94305, USA
| | - Kavya Swaminathan
- Department of Chemical and Systems Biology, Stanford University, Stanford, CA 94305, USA
| | - Joshua E Elias
- Department of Chemical and Systems Biology, Stanford University, Stanford, CA 94305, USA
| | - Daniel F Jarosz
- Department of Chemical and Systems Biology, Stanford University, Stanford, CA 94305, USA.,Department of Developmental Biology, Stanford University, Stanford, CA 94305, USA
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9
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Saoud MZ, Rhatous M, Mire SE, Lyagoubi M, Aoufi S. [Saccharomyces cerevisiae, is a yeast cell more and more involved in urinary tract infections: about 3 cases]. Pan Afr Med J 2020; 35:63. [PMID: 32537067 PMCID: PMC7250219 DOI: 10.11604/pamj.2020.35.63.18041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Accepted: 07/07/2019] [Indexed: 11/11/2022] Open
Affiliation(s)
- Mohamed Zaïd Saoud
- Laboratoire Central de Parasitologie et de Mycologie, Centre Hospitalier Ibn Sina, Rabat, Maroc.,Faculté de Médecine et de Pharmacie, Université Mohammed V de Rabat, Rabat, Maroc
| | - Mustapha Rhatous
- Laboratoire Central de Parasitologie et de Mycologie, Centre Hospitalier Ibn Sina, Rabat, Maroc.,Faculté de Médecine et de Pharmacie, Université Mohammed V de Rabat, Rabat, Maroc
| | - Samira El Mire
- Laboratoire Central de Parasitologie et de Mycologie, Centre Hospitalier Ibn Sina, Rabat, Maroc.,Faculté de Médecine et de Pharmacie, Université Mohammed V de Rabat, Rabat, Maroc
| | - Mohammed Lyagoubi
- Laboratoire Central de Parasitologie et de Mycologie, Centre Hospitalier Ibn Sina, Rabat, Maroc.,Faculté de Médecine et de Pharmacie, Université Mohammed V de Rabat, Rabat, Maroc
| | - Sarra Aoufi
- Laboratoire Central de Parasitologie et de Mycologie, Centre Hospitalier Ibn Sina, Rabat, Maroc.,Faculté de Médecine et de Pharmacie, Université Mohammed V de Rabat, Rabat, Maroc
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10
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Raghavan V, Aquadro CF, Alani E. Baker's Yeast Clinical Isolates Provide a Model for How Pathogenic Yeasts Adapt to Stress. Trends Genet 2019; 35:804-817. [PMID: 31526615 PMCID: PMC6825890 DOI: 10.1016/j.tig.2019.08.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Revised: 08/07/2019] [Accepted: 08/19/2019] [Indexed: 12/26/2022]
Abstract
Global outbreaks of drug-resistant fungi such as Candida auris are thought to be due at least in part to excessive use of antifungal drugs. Baker's yeast Saccharomyces cerevisiae has gained importance as an emerging opportunistic fungal pathogen that can cause infections in immunocompromised patients. Analyses of over 1000 S. cerevisiae isolates are providing rich resources to better understand how fungi can grow in human environments. A large percentage of clinical S. cerevisiae isolates are heterozygous across many nucleotide sites, and a significant proportion are of mixed ancestry and/or are aneuploid or polyploid. Such features potentially facilitate adaptation to new environments. These observations provide strong impetus for expanding genomic and molecular studies on clinical and wild isolates to understand the prevalence of genetic diversity and instability-generating mechanisms, and how they are selected for and maintained. Such work can also lead to the identification of new targets for antifungal drugs.
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Affiliation(s)
- Vandana Raghavan
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, NY, USA
| | - Charles F Aquadro
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, NY, USA
| | - Eric Alani
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, NY, USA.
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11
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Sendid B, Jawhara S, Sarter H, Maboudou P, Thierny C, Gower-Rousseau C, Colombel JF, Poulain D. Uric acid levels are independent of anti-Saccharomyces cerevisiae antibodies (ASCA) in Crohn's disease: A reappraisal of the role of S. cerevisiae in this setting. Virulence 2018; 9:1224-1229. [PMID: 30027793 PMCID: PMC6086291 DOI: 10.1080/21505594.2018.1496779] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Affiliation(s)
- B Sendid
- a Inserm, Univ. Lille, CHU Lille, UMR995-LIRIC- Lille Inflammation Research International Center , Lille , France.,b CHU Lille, Parasitologie-Mycologie , Institut de Microbiologie , Lille , France
| | - S Jawhara
- a Inserm, Univ. Lille, CHU Lille, UMR995-LIRIC- Lille Inflammation Research International Center , Lille , France
| | - H Sarter
- a Inserm, Univ. Lille, CHU Lille, UMR995-LIRIC- Lille Inflammation Research International Center , Lille , France
| | - P Maboudou
- c CHU Lille, laboratoire de Biochimie , Institut de Biochimie et Biologie Moléculaire , Lille , France
| | - C Thierny
- c CHU Lille, laboratoire de Biochimie , Institut de Biochimie et Biologie Moléculaire , Lille , France
| | - C Gower-Rousseau
- a Inserm, Univ. Lille, CHU Lille, UMR995-LIRIC- Lille Inflammation Research International Center , Lille , France
| | - J F Colombel
- d Division of Gastroenterology , Icahn School of Medicine at Mount Sinai , New York , NY , USA
| | - D Poulain
- a Inserm, Univ. Lille, CHU Lille, UMR995-LIRIC- Lille Inflammation Research International Center , Lille , France.,b CHU Lille, Parasitologie-Mycologie , Institut de Microbiologie , Lille , France
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12
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Liu J, Li L, Zhou L, Li B, Xu Z. Effect of ultrasound treatment conditions on Saccharomyces cerevisiae by response surface methodology. Microb Pathog 2017; 111:497-502. [PMID: 28919487 DOI: 10.1016/j.micpath.2017.09.017] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Revised: 09/11/2017] [Accepted: 09/11/2017] [Indexed: 10/18/2022]
Abstract
OBJECTIVES This study aimed to investigate the effect of different ultrasound treatment conditions on the inactivation of Saccharomyces cerevisiae with the application of response surface methodology (RSM). METHODS Ultrasound treatment were applied on different concentrations of S. cerevisiae cells with different pH, temperature, ultrasound power, irradiating time, and pulse duty ratio. Cell viability was determined by plate counting method. Response surface methodology was used to analyze the correlation among various factors. RESULTS Limited with low ultrasound power, lower pH value slightly improved the ultrasound treatment efficiency. Also, higher nonlethal temperature and ultrasound power, longer irradiation time, and lower pulse duty ratio facilitated the inactivation of S. cerevisiae. Cell concentration had no effect on ultrasound efficiency. CONCLUSIONS Ultrasound power played the most important role in the ultrasound irradiation process according to RSM analyses. Information derived from this study may aid in the control of the sublethal injury of S. cerevisiae during ultrasound treatment in food industry.
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Affiliation(s)
- Junyan Liu
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, PR China; Department of Clinical Pharmacy, College of Pharmacy, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Lin Li
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, PR China; Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, Guangzhou 510640, PR China
| | - Lizhen Zhou
- School of Applied Chemistry and Biological Technology, Shenzhen Polytechnic, Shenzhen 518055, PR China.
| | - Bing Li
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, PR China; Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, Guangzhou 510640, PR China
| | - Zhenbo Xu
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, PR China; Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, Guangzhou 510640, PR China; Department of Microbial Pathogenesis, School of Dentistry, University of Maryland, Baltimore, MD 21201, USA.
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13
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Pfliegler WP, Boros E, Pázmándi K, Jakab Á, Zsuga I, Kovács R, Urbán E, Antunovics Z, Bácsi A, Sipiczki M, Majoros L, Pócsi I. Commercial strain-derived clinicalSaccharomyces cerevisiaecan evolve new phenotypes without higher pathogenicity. Mol Nutr Food Res 2017; 61. [DOI: 10.1002/mnfr.201601099] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Revised: 06/08/2017] [Accepted: 06/28/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Walter P. Pfliegler
- Department of Biotechnology and Microbiology; University of Debrecen; Debrecen Hungary
- Postdoctoral Fellowship Programme of the Hungarian Academy of Sciences (MTA); Budapest Hungary
| | - Enikő Boros
- Department of Biotechnology and Microbiology; University of Debrecen; Debrecen Hungary
| | - Kitti Pázmándi
- Department of Immunology; University of Debrecen; Debrecen Hungary
| | - Ágnes Jakab
- Department of Biotechnology and Microbiology; University of Debrecen; Debrecen Hungary
| | - Imre Zsuga
- Department of Biotechnology and Microbiology; University of Debrecen; Debrecen Hungary
| | - Renátó Kovács
- Department of Medical Microbiology; University of Debrecen; Debrecen Hungary
- Faculty of Pharmacy; University of Debrecen; Debrecen Hungary
| | - Edit Urbán
- Institute of Clinical Microbiology; University of Szeged; Szeged Hungary
| | - Zsuzsa Antunovics
- Department of Genetics and Applied Microbiology; University of Debrecen; Debrecen Hungary
| | - Attila Bácsi
- Department of Immunology; University of Debrecen; Debrecen Hungary
| | - Matthias Sipiczki
- Department of Genetics and Applied Microbiology; University of Debrecen; Debrecen Hungary
| | - László Majoros
- Department of Medical Microbiology; University of Debrecen; Debrecen Hungary
| | - István Pócsi
- Department of Biotechnology and Microbiology; University of Debrecen; Debrecen Hungary
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Pérez-Torrado R, Querol A. Saccharomyces cerevisiae show low levels of traversal across human endothelial barrier in vitro. F1000Res 2017; 6:944. [PMID: 28979764 PMCID: PMC5605952 DOI: 10.12688/f1000research.11782.2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/20/2017] [Indexed: 12/17/2022] Open
Abstract
Background: Saccharomyces cerevisiae is generally considered safe, and is involved in the production of many types of foods and dietary supplements. However, some isolates, which are genetically related to strains used in brewing and baking, have shown virulent traits, being able to produce infections in humans, mainly in immunodeficient patients. This can lead to systemic infections in humans. Methods: In this work, we studied S. cerevisiae isolates in an in vitro human endothelial barrier model, comparing their behaviour with that of several strains of the related pathogens Candida glabrata and Candida albicans. Results: The results showed that this food related yeast is able to cross the endothelial barrier in vitro. However, in contrast to C. glabrata and C. albicans, S. cerevisiae showed very low levels of traversal. Conclusions: We conclude that using an in vitro human endothelial barrier model with S. cerevisiae can be useful to evaluate the safety of S. cerevisiae strains isolated from foods.
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Affiliation(s)
- Roberto Pérez-Torrado
- Food Biotechnology Department, Institute of Agrochemistry and Food Technology (IATA-CSIC), Paterna, Valencia, Spain
| | - Amparo Querol
- Food Biotechnology Department, Institute of Agrochemistry and Food Technology (IATA-CSIC), Paterna, Valencia, Spain
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15
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Pérez-Torrado R, Querol A. Saccharomyces cerevisiae show low levels of traversal across the human blood brain barrier in vitro. F1000Res 2017; 6:944. [PMID: 28979764 PMCID: PMC5605952 DOI: 10.12688/f1000research.11782.1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/20/2017] [Indexed: 03/28/2024] Open
Abstract
BACKGROUND Saccharomyces cerevisiae is generally considered safe, and is involved in the production of many types of foods and dietary supplements. However, some isolates, which are genetically related to strains used in brewing and baking, have shown virulent traits, being able to produce infections in humans, mainly in immunodeficient patients. This can lead to systemic infections in humans. METHODS In this work, we studied S. cerevisiae isolates in an in vitro human blood brain barrier model, comparing their behaviour with that of several strains of the related pathogens Candida glabrata and Candida albicans. RESULTS The results showed that this food related yeast is able to cross the blood brain barrier in vitro. However, in contrast to C. glabrata and C. albicans, S. cerevisiae showed very low levels of traversal. CONCLUSIONS We conclude that using an in vitro human blood brain barrier model with S. cerevisiae can be useful to evaluate the safety of S. cerevisiae strains isolated from foods.
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Affiliation(s)
- Roberto Pérez-Torrado
- Food Biotechnology Department, Institute of Agrochemistry and Food Technology (IATA-CSIC), Paterna, Valencia, Spain
| | - Amparo Querol
- Food Biotechnology Department, Institute of Agrochemistry and Food Technology (IATA-CSIC), Paterna, Valencia, Spain
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16
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Chiaro TR, Soto R, Zac Stephens W, Kubinak JL, Petersen C, Gogokhia L, Bell R, Delgado JC, Cox J, Voth W, Brown J, Stillman DJ, O'Connell RM, Tebo AE, Round JL. A member of the gut mycobiota modulates host purine metabolism exacerbating colitis in mice. Sci Transl Med 2017; 9:eaaf9044. [PMID: 28275154 PMCID: PMC5994919 DOI: 10.1126/scitranslmed.aaf9044] [Citation(s) in RCA: 153] [Impact Index Per Article: 21.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Revised: 04/17/2016] [Accepted: 02/10/2017] [Indexed: 12/20/2022]
Abstract
The commensal microbiota has an important impact on host health, which is only beginning to be elucidated. Despite the presence of fungal, archaeal, and viral members, most studies have focused solely on the bacterial microbiota. Antibodies against the yeast Saccharomyces cerevisiae are found in some patients with Crohn's disease (CD), suggesting that the mycobiota may contribute to disease severity. We report that S. cerevisiae exacerbated intestinal disease in a mouse model of colitis and increased gut barrier permeability. Transcriptome analysis of colon tissue from germ-free mice inoculated with S. cerevisiae or another fungus, Rhodotorula aurantiaca, revealed that S. cerevisiae colonization affected the intestinal barrier and host metabolism. A fecal metabolomics screen of germ-free animals demonstrated that S. cerevisiae colonization enhanced host purine metabolism, leading to an increase in uric acid production. Treatment with uric acid alone worsened disease and increased gut permeability. Allopurinol, a clinical drug used to reduce uric acid, ameliorated colitis induced by S. cerevisiae in mice. In addition, we found a positive correlation between elevated uric acid and anti-yeast antibodies in human sera. Thus, yeast in the gut may be able to potentiate metabolite production that negatively affects the course of inflammatory bowel disease.
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Affiliation(s)
- Tyson R Chiaro
- Division of Microbiology and Immunology, Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT 84112, USA
| | - Ray Soto
- Division of Microbiology and Immunology, Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT 84112, USA
| | - W Zac Stephens
- Division of Microbiology and Immunology, Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT 84112, USA
| | - Jason L Kubinak
- Division of Microbiology and Immunology, Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT 84112, USA
| | - Charisse Petersen
- Division of Microbiology and Immunology, Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT 84112, USA
| | - Lasha Gogokhia
- Division of Microbiology and Immunology, Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT 84112, USA
| | - Rickesha Bell
- Division of Microbiology and Immunology, Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT 84112, USA
| | - Julio C Delgado
- Division of Microbiology and Immunology, Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT 84112, USA
- ARUP Laboratories, 500 Chipeta Way, Salt Lake City, UT 84108, USA
| | - James Cox
- Metabolomics Core, University of Utah Health Sciences Center, Salt Lake City, UT 84112, USA
- Department of Biochemistry, University of Utah School of Medicine, Salt Lake City, UT 84112, USA
| | - Warren Voth
- Division of Microbiology and Immunology, Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT 84112, USA
| | - Jessica Brown
- Division of Microbiology and Immunology, Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT 84112, USA
| | - David J Stillman
- Division of Microbiology and Immunology, Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT 84112, USA
| | - Ryan M O'Connell
- Division of Microbiology and Immunology, Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT 84112, USA
| | - Anne E Tebo
- Division of Microbiology and Immunology, Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT 84112, USA
- ARUP Laboratories, 500 Chipeta Way, Salt Lake City, UT 84108, USA
| | - June L Round
- Division of Microbiology and Immunology, Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT 84112, USA.
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17
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Whole Genome Analysis of 132 Clinical Saccharomyces cerevisiae Strains Reveals Extensive Ploidy Variation. G3-GENES GENOMES GENETICS 2016; 6:2421-34. [PMID: 27317778 PMCID: PMC4978896 DOI: 10.1534/g3.116.029397] [Citation(s) in RCA: 90] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Budding yeast has undergone several independent transitions from commercial to clinical lifestyles. The frequency of such transitions suggests that clinical yeast strains are derived from environmentally available yeast populations, including commercial sources. However, despite their important role in adaptive evolution, the prevalence of polyploidy and aneuploidy has not been extensively analyzed in clinical strains. In this study, we have looked for patterns governing the transition to clinical invasion in the largest screen of clinical yeast isolates to date. In particular, we have focused on the hypothesis that ploidy changes have influenced adaptive processes. We sequenced 144 yeast strains, 132 of which are clinical isolates. We found pervasive large-scale genomic variation in both overall ploidy (34% of strains identified as 3n/4n) and individual chromosomal copy numbers (36% of strains identified as aneuploid). We also found evidence for the highly dynamic nature of yeast genomes, with 35 strains showing partial chromosomal copy number changes and eight strains showing multiple independent chromosomal events. Intriguingly, a lineage identified to be baker's/commercial derived with a unique damaging mutation in NDC80 was particularly prone to polyploidy, with 83% of its members being triploid or tetraploid. Polyploidy was in turn associated with a >2× increase in aneuploidy rates as compared to other lineages. This dataset provides a rich source of information on the genomics of clinical yeast strains and highlights the potential importance of large-scale genomic copy variation in yeast adaptation.
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18
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Pérez-Torrado R, Querol A. Opportunistic Strains of Saccharomyces cerevisiae: A Potential Risk Sold in Food Products. Front Microbiol 2016; 6:1522. [PMID: 26779173 PMCID: PMC4705302 DOI: 10.3389/fmicb.2015.01522] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Accepted: 12/17/2015] [Indexed: 12/28/2022] Open
Abstract
In recent decades, fungal infections have emerged as an important health problem associated with more people who present deficiencies in the immune system, such as HIV or transplanted patients. Saccharomyces cerevisiae is one of the emerging fungal pathogens with a unique characteristic: its presence in many food products. S. cerevisiae has an impeccably good food safety record compared to other microorganisms like virus, bacteria and some filamentous fungi. However, humans unknowingly and inadvertently ingest large viable populations of S. cerevisiae (home-brewed beer or dietary supplements that contain yeast). In the last few years, researchers have studied the nature of S. cerevisiae strains and the molecular mechanisms related to infections. Here we review the last advance made in this emerging pathogen and we discuss the implication of using this species in food products.
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Affiliation(s)
- Roberto Pérez-Torrado
- Food Biotechnology Department, Instituto de Agroquímica y Tecnología de los Alimentos - Consejo Superior de Investigaciones Científicas Valencia, Spain
| | - Amparo Querol
- Food Biotechnology Department, Instituto de Agroquímica y Tecnología de los Alimentos - Consejo Superior de Investigaciones Científicas Valencia, Spain
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19
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Anoop V, Rotaru S, Shwed PS, Tayabali AF, Arvanitakis G. Review of current methods for characterizing virulence and pathogenicity potential of industrial Saccharomyces cerevisiae strains towards humans. FEMS Yeast Res 2015. [PMID: 26195617 DOI: 10.1093/femsyr/fov057] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Most industrial Saccharomyces cerevisiae strains used in food or biotechnology processes are benign. However, reports of S. cerevisiae infections have emerged and novel strains continue to be developed. In order to develop recommendations for the human health risk assessment of S. cerevisiae strains, we conducted a literature review of current methods used to characterize their pathogenic potential and evaluated their relevance towards risk assessment. These studies revealed that expression of virulence traits in S. cerevisiae is complex and depends on many factors. Given the opportunistic nature of this organism, an approach using multiple lines of evidence is likely necessary for the reasonable prediction of the pathogenic potential of a particular strain. Risk assessment of S. cerevisiae strains would benefit from more research towards the comparison of virulent and non-virulent strains in order to better understand those genotypic and phenotypic traits most likely to be associated with pathogenicity.
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Affiliation(s)
- Valar Anoop
- New Substances Assessment and Control Bureau, Safe Environments Directorate, Healthy Environments and Consumer Safety Branch, Health Canada, 99 Metcalfe Street, Floor-11, Ottawa, ON K1A 0K9, Canada
| | - Sever Rotaru
- New Substances Assessment and Control Bureau, Safe Environments Directorate, Healthy Environments and Consumer Safety Branch, Health Canada, 99 Metcalfe Street, Floor-11, Ottawa, ON K1A 0K9, Canada
| | - Philip S Shwed
- Environmental Health Science Research Bureau, Environmental and Radiation Health Sciences Directorate, Healthy Environments and Consumer Safety Branch, Health Canada, 50 Colombine Driveway, Ottawa, ON K1A0K9, Canada
| | - Azam F Tayabali
- Environmental Health Science Research Bureau, Environmental and Radiation Health Sciences Directorate, Healthy Environments and Consumer Safety Branch, Health Canada, 50 Colombine Driveway, Ottawa, ON K1A0K9, Canada
| | - George Arvanitakis
- New Substances Assessment and Control Bureau, Safe Environments Directorate, Healthy Environments and Consumer Safety Branch, Health Canada, 99 Metcalfe Street, Floor-11, Ottawa, ON K1A 0K9, Canada
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20
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Pérez-Torrado R, Llopis S, Perrone B, Gómez-Pastor R, Hube B, Querol A. Comparative genomic analysis reveals a critical role of de novo nucleotide biosynthesis for Saccharomyces cerevisiae virulence. PLoS One 2015; 10:e0122382. [PMID: 25816288 PMCID: PMC4376706 DOI: 10.1371/journal.pone.0122382] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Accepted: 02/23/2015] [Indexed: 12/22/2022] Open
Abstract
In recent years, the number of human infection cases produced by the food related species Saccharomyces cerevisiae has increased. Whereas many strains of this species are considered safe, other 'opportunistic' strains show a high degree of potential virulence attributes and can cause infections in immunocompromised patients. Here we studied the genetic characteristics of selected opportunistic strains isolated from dietary supplements and also from patients by array comparative genomic hybridization. Our results show increased copy numbers of IMD genes in opportunistic strains, which are implicated in the de novo biosynthesis of the purine nucleotides pathway. The importance of this pathway for virulence of S. cerevisiae was confirmed by infections in immunodeficient murine models using a GUA1 mutant, a key gene of this pathway. We show that exogenous guanine, an end product of this pathway in its triphosphorylated form, increases the survival of yeast strains in ex vivo blood infections. Finally, we show the importance of the DNA damage response that activates dNTP biosynthesis in yeast cells during ex vivo blood infections. We conclude that opportunistic yeasts may use an enhanced de novo biosynthesis of the purine nucleotides pathway to increase survival and favor infections in the host.
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Affiliation(s)
| | - Silvia Llopis
- Instituto de Agroquímica y Tecnología de los Alimentos, CSIC, Valencia, Spain
| | - Benedetta Perrone
- Instituto de Agroquímica y Tecnología de los Alimentos, CSIC, Valencia, Spain
- Department of Agricultural, Forest and Food Sciences Microbiology and Food Technologies Unit University of Torino, Torino, Italy
| | - Rocío Gómez-Pastor
- Instituto de Agroquímica y Tecnología de los Alimentos, CSIC, Valencia, Spain
| | - Bernhard Hube
- Department of Microbial Pathogenicity Mechanisms, Leibniz Institute for Natural Product Research and Infection Biology, Hans-Knoell-Institute (HKI), Jena, Germany
- Friedrich Schiller University, Jena, Germany
| | - Amparo Querol
- Instituto de Agroquímica y Tecnología de los Alimentos, CSIC, Valencia, Spain
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21
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Immunoproteomic profiling of Saccharomyces cerevisiae systemic infection in a murine model. J Proteomics 2014; 112:14-26. [PMID: 25173100 DOI: 10.1016/j.jprot.2014.08.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Revised: 08/01/2014] [Accepted: 08/06/2014] [Indexed: 02/01/2023]
Abstract
UNLABELLED Saccharomyces cerevisiae is considered a safe microorganism widely used as a dietary supplement. However, in the latest decades several cases of S. cerevisiae infections have been reported. Recent studies in a murine model of systemic infection have also revealed the virulence of some S. cerevisiae dietary strains. Here we use an immunoproteomic approach based on protein separation by 2D-PAGE followed by Western-blotting to compare the serological response against a virulent dietary and a non-virulent laboratory strains leading to the identification of highly different patterns of antigenic proteins. Thirty-six proteins that elicit a serological response in mice have been identified. Most of them are involved in stress responses and metabolic pathways. Their selectivity as putative biomarkers for S. cerevisiae infections was assessed by testing sera from S. cerevisiae-infected mice against Candida albicans and C. glabrata proteins. Some chaperones and metabolic proteins showed cross-reactivity. We also compare the S. cerevisiae immunodetected proteins with previously described C. albicans antigens. The results point to the stress-related proteins Ahp1, Yhb1 and Oye2, as well as the glutamine synthetase Gln1 and the oxysosterol binding protein Kes1 as putative candidates for being evaluated as biomarkers for diagnostic assays of S. cerevisiae infections. BIOLOGICAL SIGNIFICANCE S. cerevisiae can cause opportunistic infections, and therefore, a precise diagnosis of fungal infections is necessary. This immunoproteomic analysis of sera from a model murine infection with a virulent dietary S. cerevisiae strain has been shown to be a source of candidate proteins for being evaluated as biomarkers to develop assays for diagnosis of S. cerevisiae infections. To our knowledge, this is the first study devoted to the identification of S. cerevisiae immunogenic proteins and the results allowed the proposal of five antigens to be further investigated.
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22
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Llopis S, Hernández-Haro C, Monteoliva L, Querol A, Molina M, Fernández-Espinar MT. Pathogenic potential of Saccharomyces strains isolated from dietary supplements. PLoS One 2014; 9:e98094. [PMID: 24879417 PMCID: PMC4039445 DOI: 10.1371/journal.pone.0098094] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2013] [Accepted: 04/28/2014] [Indexed: 12/28/2022] Open
Abstract
Saccharomyces cerevisiae plays a beneficial role in health because of its intrinsic nutritional value and bio-functional properties, which is why it is also used as a dietary supplement. However, the perception that S. cerevisiae is harmless has changed due to an increasing number of infections caused by this yeast. Given this scenario, we have tested whether viable strains contained in dietary supplements displayed virulence-associated phenotypic traits that could contribute to virulence in humans. We have also performed an in vivo study of the pathogenic potential of these strains using a murine model of systemic infection by intravenous inoculation. A total of 5 strains were isolated from 22 commercial products and tested. Results highlight one strain (D14) in terms of burden levels in brains and kidneys and ability to cause death, whereas the other two strains (D2 and D4) were considered of low virulence. Our results suggest a strong relationship between some of the virulence-associated phenotypic traits (ability to grow at 39°C and pseudohyphal growth) and the in vivo virulence in a mouse model of intravenous inoculation for isolates under study. The isolate displaying greatest virulence (D14) was evaluated in an experimental murine model of gastrointestinal infection with immunosuppression and disruption of mucosal integrity, which are common risk factors for developing infection in humans, and results were compared with an avirulent strain (D23). We showed that D14 was able to spread to mesenteric nodes and distant organs under these conditions. Given the widespread consumption of dietary supplements, we recommend only safe strains be used.
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Affiliation(s)
- Silvia Llopis
- Departamento de Biotecnología de los Alimentos, Instituto de Agroquímica y Tecnología de Alimentos (CSIC), Paterna, Valencia, Spain
| | - Carolina Hernández-Haro
- Departamento de Microbiología II, Facultad de Farmacia, Universidad Complutense de Madrid and Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain
| | - Lucía Monteoliva
- Departamento de Microbiología II, Facultad de Farmacia, Universidad Complutense de Madrid and Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain
| | - Amparo Querol
- Departamento de Biotecnología de los Alimentos, Instituto de Agroquímica y Tecnología de Alimentos (CSIC), Paterna, Valencia, Spain
| | - María Molina
- Departamento de Microbiología II, Facultad de Farmacia, Universidad Complutense de Madrid and Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain
| | - María T. Fernández-Espinar
- Departamento de Biotecnología de los Alimentos, Instituto de Agroquímica y Tecnología de Alimentos (CSIC), Paterna, Valencia, Spain
- * E-mail:
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23
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Arendrup M, Boekhout T, Akova M, Meis J, Cornely O, Lortholary O. ESCMID† and ECMM‡ joint clinical guidelines for the diagnosis and management of rare invasive yeast infections. Clin Microbiol Infect 2014; 20 Suppl 3:76-98. [DOI: 10.1111/1469-0691.12360] [Citation(s) in RCA: 350] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2013] [Revised: 08/16/2013] [Accepted: 08/16/2013] [Indexed: 12/27/2022]
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24
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FLO11 expression in clinical and non-clinical Saccharomyces cerevisiae strains and its association with virulence. ANN MICROBIOL 2013. [DOI: 10.1007/s13213-013-0605-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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25
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Llopis S, Querol A, Heyken A, Hube B, Jespersen L, Fernández-Espinar MT, Pérez-Torrado R. Transcriptomics in human blood incubation reveals the importance of oxidative stress response in Saccharomyces cerevisiae clinical strains. BMC Genomics 2012; 13:419. [PMID: 22916735 PMCID: PMC3483181 DOI: 10.1186/1471-2164-13-419] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2012] [Accepted: 08/20/2012] [Indexed: 01/19/2023] Open
Abstract
Background In recent years an increasing number of yeast infections in humans have been related to certain clinical isolates of Saccharomyces cerevisiae. Some clinical strains showed in vivo and in vitro virulence traits and were able to cause death in mice whereas other clinical strains were avirulent. Results In this work, we studied the transcriptional profiles of two S. cerevisiae clinical strains showing virulent traits and two control non-virulent strains during a blood incubation model and detected a specific transcriptional response of clinical strains. This response involves an mRNA levels increase of amino acid biosynthesis genes and especially oxidative stress related genes. We observed that the clinical strains were more resistant to reactive oxygen species in vitro. In addition, blood survival of clinical isolates was high, reaching similar levels to pathogenic Candida albicans strain. Furthermore, a virulent strain mutant in the transcription factor Yap1p, unable to grow in oxidative stress conditions, presented decreased survival levels in human blood compared with the wild type or YAP1 reconstituted strain. Conclusions Our data suggest that this enhanced oxidative stress response in virulent clinical isolates, presumably induced in response to oxidative burst from host defense cells, is important to increase survival in human blood and can help to infect and even produce death in mice models.
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Affiliation(s)
- Silvia Llopis
- Instituto de Agroquímica y Tecnología de los Alimentos, IATA-CSIC, Burjassot, Spain
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Tierney L, Kuchler K, Rizzetto L, Cavalieri D. Systems biology of host-fungus interactions: turning complexity into simplicity. Curr Opin Microbiol 2012; 15:440-6. [PMID: 22717554 PMCID: PMC3501689 DOI: 10.1016/j.mib.2012.05.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2012] [Revised: 04/24/2012] [Accepted: 05/01/2012] [Indexed: 12/15/2022]
Abstract
Modeling interactions between fungi and their hosts at the systems level requires a molecular understanding both of how the host orchestrates immune surveillance and tolerance, and how this activation, in turn, affects fungal adaptation and survival. The transition from the commensal to pathogenic state, and the co-evolution of fungal strains within their hosts, necessitates the molecular dissection of fungal traits responsible for these interactions. There has been a dramatic increase in publically available genome-wide resources addressing fungal pathophysiology and host–fungal immunology. The integration of these existing data and emerging large-scale technologies addressing host–pathogen interactions requires novel tools to connect genome-wide data sets and theoretical approaches with experimental validation so as to identify inherent and emerging properties of host–pathogen relationships and to obtain a holistic view of infectious processes. If successful, a better understanding of the immune response in health and microbial diseases will eventually emerge and pave the way for improved therapies.
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Affiliation(s)
- Lanay Tierney
- Medical University of Vienna, Christian Doppler Laboratory Infection Biology, Max F. Perutz Laboratories, A-1030 Vienna, Austria
| | - Karl Kuchler
- Medical University of Vienna, Christian Doppler Laboratory Infection Biology, Max F. Perutz Laboratories, A-1030 Vienna, Austria
| | - Lisa Rizzetto
- Department of Preclinical and Clinical Pharmacology, University of Florence, 50139 Firenze, Italy
| | - Duccio Cavalieri
- Department of Preclinical and Clinical Pharmacology, University of Florence, 50139 Firenze, Italy
- Research and Innovation Centre, Edmund Mach Foundation, San Michele all’Adige, 38010, Trento, Italy
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27
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Clinical Saccharomyces cerevisiae isolates cannot cross the epithelial barrier in vitro. Int J Food Microbiol 2012; 157:59-64. [DOI: 10.1016/j.ijfoodmicro.2012.04.012] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2012] [Revised: 04/10/2012] [Accepted: 04/13/2012] [Indexed: 01/01/2023]
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28
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Scientific Opinion on the maintenance of the list of QPS biological agents intentionally added to food and feed (2011 update). EFSA J 2011. [DOI: 10.2903/j.efsa.2011.2497] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
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29
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Friend or foe: using systems biology to elucidate interactions between fungi and their hosts. Trends Microbiol 2011; 19:509-15. [DOI: 10.1016/j.tim.2011.07.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2011] [Revised: 07/26/2011] [Accepted: 07/27/2011] [Indexed: 11/20/2022]
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