101
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Orlandi I, Stamerra G, Vai M. Altered Expression of Mitochondrial NAD + Carriers Influences Yeast Chronological Lifespan by Modulating Cytosolic and Mitochondrial Metabolism. Front Genet 2018; 9:676. [PMID: 30619489 PMCID: PMC6305841 DOI: 10.3389/fgene.2018.00676] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 12/04/2018] [Indexed: 01/07/2023] Open
Abstract
Nicotinamide adenine dinucleotide (NAD+) represents an essential cofactor in sustaining cellular bioenergetics and maintaining cellular fitness, and has emerged as a therapeutic target to counteract aging and age-related diseases. Besides NAD+ involvement in multiple redox reactions, it is also required as co-substrate for the activity of Sirtuins, a family of evolutionary conserved NAD+-dependent deacetylases that regulate both metabolism and aging. The founding member of this family is Sir2 of Saccharomyces cerevisiae, a well-established model system for studying aging of post-mitotic mammalian cells. In this context, it refers to chronological aging, in which the chronological lifespan (CLS) is measured. In this paper, we investigated the effects of changes in the cellular content of NAD+ on CLS by altering the expression of mitochondrial NAD+ carriers, namely Ndt1 and Ndt2. We found that the deletion or overexpression of these carriers alters the intracellular levels of NAD+ with opposite outcomes on CLS. In particular, lack of both carriers decreases NAD+ content and extends CLS, whereas NDT1 overexpression increases NAD+ content and reduces CLS. This correlates with opposite cytosolic and mitochondrial metabolic assets shown by the two types of mutants. In the former, an increase in the efficiency of oxidative phosphorylation is observed together with an enhancement of a pro-longevity anabolic metabolism toward gluconeogenesis and trehalose storage. On the contrary, NDT1 overexpression brings about on the one hand, a decrease in the respiratory efficiency generating harmful superoxide anions, and on the other, a decrease in gluconeogenesis and trehalose stores: all this is reflected into a time-dependent loss of mitochondrial functionality during chronological aging.
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Affiliation(s)
- Ivan Orlandi
- SYSBIO Centre for Systems Biology, Milan, Italy.,Dipartimento di Biotecnologie e Bioscienze, Università di Milano-Bicocca, Milan, Italy
| | - Giulia Stamerra
- Dipartimento di Biotecnologie e Bioscienze, Università di Milano-Bicocca, Milan, Italy
| | - Marina Vai
- Dipartimento di Biotecnologie e Bioscienze, Università di Milano-Bicocca, Milan, Italy
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102
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Jing W, Camellato B, Roney IJ, Kaern M, Godin M. Measuring Single-Cell Phenotypic Growth Heterogeneity Using a Microfluidic Cell Volume Sensor. Sci Rep 2018; 8:17809. [PMID: 30546021 PMCID: PMC6293012 DOI: 10.1038/s41598-018-36000-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Accepted: 11/13/2018] [Indexed: 12/24/2022] Open
Abstract
An imaging-integrated microfluidic cell volume sensor was used to evaluate the volumetric growth rate of single cells from a Saccharomyces cerevisiae population exhibiting two phenotypic expression states of the PDR5 gene. This gene grants multidrug resistance by transcribing a membrane transporter capable of pumping out cytotoxic compounds from the cell. Utilizing fluorescent markers, single cells were isolated and trapped, then their growth rates were measured in two on-chip environments: rich media and media dosed with the antibiotic cycloheximide. Approximating growth rates to first-order, we assessed the fitness of individual cells and found that those with low PDR5 expression had higher fitness in rich media whereas cells with high PDR5 expression had higher fitness in the presence of the drug. Moreover, the drug dramatically reduced the fitness of cells with low PDR5 expression but had comparatively minimal impact on the fitness of cells with high PDR5 expression. Our experiments show the utility of this imaging-integrated microfluidic cell volume sensor for high-resolution, single-cell analysis, as well as its potential application for studies that characterize and compare the fitness and morphology of individual cells from heterogeneous populations under different growth conditions.
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Affiliation(s)
- Wenyang Jing
- Department of Physics, University of Ottawa, Ottawa, Ontario, Canada
| | - Brendan Camellato
- Ottawa Institute of Systems Biology, Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, Ontario, Canada
| | - Ian J Roney
- Ottawa Institute of Systems Biology, Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, Ontario, Canada
| | - Mads Kaern
- Department of Physics, University of Ottawa, Ottawa, Ontario, Canada.,Ottawa Institute of Systems Biology, Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, Ontario, Canada
| | - Michel Godin
- Department of Physics, University of Ottawa, Ottawa, Ontario, Canada. .,Ottawa-Carleton Institute for Biomedical Engineering, University of Ottawa, Ottawa, Ontario, Canada. .,Department of Mechanical Engineering, University of Ottawa, Ottawa, Ontario, Canada.
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103
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Choi JE, Heo SH, Kim MJ, Chung WH. Lack of superoxide dismutase in a rad51 mutant exacerbates genomic instability and oxidative stress-mediated cytotoxicity in Saccharomyces cerevisiae. Free Radic Biol Med 2018; 129:97-106. [PMID: 30223018 DOI: 10.1016/j.freeradbiomed.2018.09.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 09/06/2018] [Accepted: 09/13/2018] [Indexed: 12/23/2022]
Abstract
A genetic analysis of synthetic lethal interactions in yeast revealed that the mutation of SOD1, encoding an antioxidant enzyme that scavenges superoxide anion radical, impaired the growth of a set of mutants defective in homologous recombination (HR) pathway. Hence, SOD1 inhibition has been proposed as a promising approach for the selective killing of HR-deficient cancer cells. However, we show that the deletion of RAD51 and SOD1 is not synthetic lethal but displays considerably slow growth and synergistic sensitivity to both reactive oxygen species (ROS)- and DNA double-strand break (DSB)-generating drugs in the budding yeast Saccharomyces cerevisiae. The function of Sod1 in regard to Rad51 is dependent on Ccs1, a copper chaperone for Sod1. Sod1 deficiency aggravates genomic instability in conjunction with the absence of Rad51 by inducing DSBs and an elevated mutation frequency. Inversely, lack of Rad51 causes a Sod1 deficiency-derived increase of intracellular ROS levels. Taken together, our results indicate that there is a significant and specific crosstalk between two major cellular damage response pathways, ROS signaling and DSB repair, for cell survival.
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Affiliation(s)
- Ji Eun Choi
- College of Pharmacy, Duksung Women's University, Seoul 01369, Republic of Korea; Innovative Drug Center, Duksung Women's University, Seoul 01369, Republic of Korea
| | - Seo-Hee Heo
- College of Pharmacy, Duksung Women's University, Seoul 01369, Republic of Korea; Innovative Drug Center, Duksung Women's University, Seoul 01369, Republic of Korea
| | - Myung Ju Kim
- College of Pharmacy, Duksung Women's University, Seoul 01369, Republic of Korea; Innovative Drug Center, Duksung Women's University, Seoul 01369, Republic of Korea
| | - Woo-Hyun Chung
- College of Pharmacy, Duksung Women's University, Seoul 01369, Republic of Korea; Innovative Drug Center, Duksung Women's University, Seoul 01369, Republic of Korea.
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104
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Dib HX, de Oliveira DGL, de Oliveira CFR, Taveira GB, de Oliveira Mello E, Verbisk NV, Chang MR, Corrêa Junior D, Gomes VM, Macedo MLR. Biochemical characterization of a Kunitz inhibitor from Inga edulis seeds with antifungal activity against Candida spp. Arch Microbiol 2018; 201:223-233. [DOI: 10.1007/s00203-018-1598-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Revised: 07/03/2018] [Accepted: 11/19/2018] [Indexed: 11/25/2022]
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105
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Choudhary DK, Mishra A. In vitro investigation of hypoglycemic and oxidative stress properties of fava bean (Vicia faba L.) seed extract in Saccharomyces cerevisiae 2376. Prep Biochem Biotechnol 2018; 48:920-929. [DOI: 10.1080/10826068.2018.1525560] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Dhiraj Kumar Choudhary
- School of Biochemical Engineering, Indian Institute of Technology (BHU), Varanasi, India
| | - Abha Mishra
- School of Biochemical Engineering, Indian Institute of Technology (BHU), Varanasi, India
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106
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de Oliveira CF, Oliveira CT, Taveira GB, de Oliveira Mello E, Gomes VM, Macedo MLR. Characterization of a Kunitz trypsin inhibitor from Enterolobium timbouva with activity against Candida species. Int J Biol Macromol 2018; 119:645-653. [DOI: 10.1016/j.ijbiomac.2018.07.034] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 07/09/2018] [Accepted: 07/10/2018] [Indexed: 12/15/2022]
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107
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Fermentative degradation of Patulin by Saccharomyces cerevisiae in aqueous solution. Lebensm Wiss Technol 2018. [DOI: 10.1016/j.lwt.2018.07.040] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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108
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Li J, Ma L, Liao X, Liu D, Lu X, Chen S, Ye X, Ding T. Ultrasound-Induced Escherichia coli O157:H7 Cell Death Exhibits Physical Disruption and Biochemical Apoptosis. Front Microbiol 2018; 9:2486. [PMID: 30459727 PMCID: PMC6232819 DOI: 10.3389/fmicb.2018.02486] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 09/28/2018] [Indexed: 12/30/2022] Open
Abstract
Ultrasound has attracted great interest of both industry and scientific communities for its potential use as a physical processing and preservation tool. In this study, Escherichia coli O157:H7 was selected as the model microbe to investigate the ultrasound-induced cell death. Slight variations in membrane potential and ion exchanges across membrane induced by low-intensity ultrasound increased the membrane permeability of E. coli O157:H7, and this reversible sublethal effect can preserve the viability of E. coli O157:H7 and meanwhile be beneficial for bioprocessing application. In comparison, high-intensity ultrasound resulted in irreversible lethal effect on E. coli O157:H7, which can be applied in the field of microbial inactivation. In addition, both low- and high-intensity ultrasound induced either physical destruction or trigger genetically encoded apoptosis of E. coli O157:H7. Accumulation of reactive oxygen species and decrease of adenosine tri-phosphate might be related to the physiological and biochemical hallmarks of apoptosis, including exposed phosphatidylserine and activated caspases in E. coli O157:H7. The result provides novel insight into the mechanisms of non-thermal physical treatment on the inactivation of bacteria and lays foundation for the further research on the cell signaling and metabolic pathway in apoptotic bacteria.
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Affiliation(s)
- Jiao Li
- Department of Food Science and Nutrition, National Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang University, Hangzhou, China.,Key Laboratory for Agro-Products Postharvest Handling of Ministry of Agriculture, Zhejiang Key Laboratory for Agro-Food Processing, Hangzhou, China
| | - Luyao Ma
- Food, Nutrition and Health Program, Faculty of Land and Food Systems, The University of British Columbia, Vancouver, BC, Canada
| | - Xinyu Liao
- Department of Food Science and Nutrition, National Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang University, Hangzhou, China.,Key Laboratory for Agro-Products Postharvest Handling of Ministry of Agriculture, Zhejiang Key Laboratory for Agro-Food Processing, Hangzhou, China
| | - Donghong Liu
- Department of Food Science and Nutrition, National Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang University, Hangzhou, China.,Key Laboratory for Agro-Products Postharvest Handling of Ministry of Agriculture, Zhejiang Key Laboratory for Agro-Food Processing, Hangzhou, China
| | - Xiaonan Lu
- Food, Nutrition and Health Program, Faculty of Land and Food Systems, The University of British Columbia, Vancouver, BC, Canada
| | - Shiguo Chen
- Department of Food Science and Nutrition, National Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang University, Hangzhou, China.,Key Laboratory for Agro-Products Postharvest Handling of Ministry of Agriculture, Zhejiang Key Laboratory for Agro-Food Processing, Hangzhou, China
| | - Xingqian Ye
- Department of Food Science and Nutrition, National Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang University, Hangzhou, China.,Key Laboratory for Agro-Products Postharvest Handling of Ministry of Agriculture, Zhejiang Key Laboratory for Agro-Food Processing, Hangzhou, China
| | - Tian Ding
- Department of Food Science and Nutrition, National Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang University, Hangzhou, China.,Key Laboratory for Agro-Products Postharvest Handling of Ministry of Agriculture, Zhejiang Key Laboratory for Agro-Food Processing, Hangzhou, China
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109
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Hofer S, Kainz K, Zimmermann A, Bauer MA, Pendl T, Poglitsch M, Madeo F, Carmona-Gutierrez D. Studying Huntington's Disease in Yeast: From Mechanisms to Pharmacological Approaches. Front Mol Neurosci 2018; 11:318. [PMID: 30233317 PMCID: PMC6131589 DOI: 10.3389/fnmol.2018.00318] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Accepted: 08/16/2018] [Indexed: 12/22/2022] Open
Abstract
Huntington's disease (HD) is a neurodegenerative disorder that leads to progressive neuronal loss, provoking impaired motor control, cognitive decline, and dementia. So far, HD remains incurable, and available drugs are effective only for symptomatic management. HD is caused by a mutant form of the huntingtin protein, which harbors an elongated polyglutamine domain and is highly prone to aggregation. However, many aspects underlying the cytotoxicity of mutant huntingtin (mHTT) remain elusive, hindering the efficient development of applicable interventions to counteract HD. An important strategy to obtain molecular insights into human disorders in general is the use of eukaryotic model organisms, which are easy to genetically manipulate and display a high degree of conservation regarding disease-relevant cellular processes. The budding yeast Saccharomyces cerevisiae has a long-standing and successful history in modeling a plethora of human maladies and has recently emerged as an effective tool to study neurodegenerative disorders, including HD. Here, we summarize some of the most important contributions of yeast to HD research, specifically concerning the elucidation of mechanistic features of mHTT cytotoxicity and the potential of yeast as a platform to screen for pharmacological agents against HD.
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Affiliation(s)
- Sebastian Hofer
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
| | - Katharina Kainz
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
| | - Andreas Zimmermann
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
- Department of Internal Medicine, Medical University of Graz, Graz, Austria
| | - Maria A. Bauer
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
| | - Tobias Pendl
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
| | - Michael Poglitsch
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
| | - Frank Madeo
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
- BioTechMed-Graz, Graz, Austria
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110
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Zimmermann A, Hofer S, Pendl T, Kainz K, Madeo F, Carmona-Gutierrez D. Yeast as a tool to identify anti-aging compounds. FEMS Yeast Res 2018; 18:4919731. [PMID: 29905792 PMCID: PMC6001894 DOI: 10.1093/femsyr/foy020] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Accepted: 02/27/2018] [Indexed: 12/23/2022] Open
Abstract
In the search for interventions against aging and age-related diseases, biological screening platforms are indispensable tools to identify anti-aging compounds among large substance libraries. The budding yeast, Saccharomyces cerevisiae, has emerged as a powerful chemical and genetic screening platform, as it combines a rapid workflow with experimental amenability and the availability of a wide range of genetic mutant libraries. Given the amount of conserved genes and aging mechanisms between yeast and human, testing candidate anti-aging substances in yeast gene-deletion or overexpression collections, or de novo derived mutants, has proven highly successful in finding potential molecular targets. Yeast-based studies, for example, have led to the discovery of the polyphenol resveratrol and the natural polyamine spermidine as potential anti-aging agents. Here, we present strategies for pharmacological anti-aging screens in yeast, discuss common pitfalls and summarize studies that have used yeast for drug discovery and target identification.
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Affiliation(s)
- Andreas Zimmermann
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, 8010, Austria
| | - Sebastian Hofer
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, 8010, Austria
| | - Tobias Pendl
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, 8010, Austria
| | - Katharina Kainz
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, 8010, Austria
| | - Frank Madeo
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, 8010, Austria
- BioTechMed Graz, Graz, 8010, Austria
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111
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Guo L, Carraro M, Sartori G, Minervini G, Eriksson O, Petronilli V, Bernardi P. Arginine 107 of yeast ATP synthase subunit g mediates sensitivity of the mitochondrial permeability transition to phenylglyoxal. J Biol Chem 2018; 293:14632-14645. [PMID: 30093404 DOI: 10.1074/jbc.ra118.004495] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2018] [Revised: 07/27/2018] [Indexed: 12/18/2022] Open
Abstract
Modification with arginine-specific glyoxals modulates the permeability transition (PT) of rat liver mitochondria, with inhibitory or inducing effects that depend on the net charge of the adduct(s). Here, we show that phenylglyoxal (PGO) affects the PT in a species-specific manner (inhibition in mouse and yeast, induction in human and Drosophila mitochondria). Following the hypotheses (i) that the effects are mediated by conserved arginine(s) and (ii) that the PT is mediated by the F-ATP synthase, we have narrowed the search to 60 arginines. Most of these residues are located in subunits α, β, γ, ϵ, a, and c and were excluded because PGO modification did not significantly affect enzyme catalysis. On the other hand, yeast mitochondria lacking subunit g or bearing a subunit g R107A mutation were totally resistant to PT inhibition by PGO. Thus, the effect of PGO on the PT is specifically mediated by Arg-107, the only subunit g arginine that has been conserved across species. These findings are evidence that the PT is mediated by F-ATP synthase.
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Affiliation(s)
- Lishu Guo
- From the Consiglio Nazionale delle Ricerche Institute of Neuroscience and Department of Biomedical Sciences, University of Padova, Padova 35131, Italy and
| | - Michela Carraro
- From the Consiglio Nazionale delle Ricerche Institute of Neuroscience and Department of Biomedical Sciences, University of Padova, Padova 35131, Italy and
| | - Geppo Sartori
- From the Consiglio Nazionale delle Ricerche Institute of Neuroscience and Department of Biomedical Sciences, University of Padova, Padova 35131, Italy and
| | - Giovanni Minervini
- From the Consiglio Nazionale delle Ricerche Institute of Neuroscience and Department of Biomedical Sciences, University of Padova, Padova 35131, Italy and
| | - Ove Eriksson
- the Department of Biochemistry and Developmental Biology, Faculty of Medicine, University of Helsinki, Helsinki 00290, Finland
| | - Valeria Petronilli
- From the Consiglio Nazionale delle Ricerche Institute of Neuroscience and Department of Biomedical Sciences, University of Padova, Padova 35131, Italy and
| | - Paolo Bernardi
- From the Consiglio Nazionale delle Ricerche Institute of Neuroscience and Department of Biomedical Sciences, University of Padova, Padova 35131, Italy and
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112
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Breitenbach M, Rinnerthaler M, Weber M, Breitenbach-Koller H, Karl T, Cullen P, Basu S, Haskova D, Hasek J. The defense and signaling role of NADPH oxidases in eukaryotic cells : Review. Wien Med Wochenschr 2018; 168:286-299. [PMID: 30084091 PMCID: PMC6132560 DOI: 10.1007/s10354-018-0640-4] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Accepted: 05/14/2018] [Indexed: 01/18/2023]
Abstract
This short review article summarizes what is known clinically and biochemically about the seven human NADPH oxidases. Emphasis is put on the connection between mutations in the catalytic and regulatory subunits of Nox2, the phagocyte defense enzyme, with syndromes like chronic granulomatous disease, as well as a number of chronic inflammatory diseases. These arise paradoxically from a lack of reactive oxygen species production needed as second messengers for immune regulation. Both Nox2 and the six other human NADPH oxidases display signaling functions in addition to the functions of these enzymes in specialized biochemical reactions, for instance, synthesis of the hormone thyroxine. NADPH oxidases are also needed by Saccharomyces cerevisiae cells for the regulation of the actin cytoskeleton in times of stress or developmental changes, such as pseudohyphae formation. The article shows that in certain cancer cells Nox4 is also involved in the re-structuring of the actin cytoskeleton, which is required for cell mobility and therefore for metastasis.
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Affiliation(s)
| | | | - Manuela Weber
- Department of Bioscienes, University of Salzburg, Salzburg, Austria
| | | | - Thomas Karl
- Department of Bioscienes, University of Salzburg, Salzburg, Austria
| | - Paul Cullen
- Department of Biological Sciences, University at Buffalo, The State University of New York, Buffalo, USA
| | - Sukaniya Basu
- Department of Biological Sciences, University at Buffalo, The State University of New York, Buffalo, USA
| | - Dana Haskova
- Laboratory of Cell Reproduction, Institute of Microbiology of AS CR, v.v.i., Prague, Czech Republic
| | - Jiri Hasek
- Laboratory of Cell Reproduction, Institute of Microbiology of AS CR, v.v.i., Prague, Czech Republic
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113
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Willis SD, Stieg DC, Ong KL, Shah R, Strich AK, Grose JH, Cooper KF. Snf1 cooperates with the CWI MAPK pathway to mediate the degradation of Med13 following oxidative stress. MICROBIAL CELL 2018; 5:357-370. [PMID: 30175106 PMCID: PMC6116281 DOI: 10.15698/mic2018.08.641] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Eukaryotic cells, when faced with unfavorable environmental conditions, mount either pro-survival or pro-death programs. The conserved cyclin C-Cdk8 kinase plays a key role in this decision. Both are members of the Cdk8 kinase module that, along with Med12 and Med13, associate with the core Mediator complex of RNA polymerase II. In Saccharomyces cerevisiae, oxidative stress triggers Med13 destruction, which releases cyclin C into the cytoplasm to promote mitochondrial fission and programmed cell death. The SCFGrr1 ubiquitin ligase mediates Med13 degradation dependent on the cell wall integrity pathway, MAPK Slt2. Here we show that the AMP kinase Snf1 activates a second SCFGrr1 responsive degron in Med13. Deletion of Snf1 resulted in nuclear retention of cyclin C and failure to induce mitochondrial fragmentation. This degron was able to confer oxidative-stress-induced destruction when fused to a heterologous protein in a Snf1 dependent manner. Although snf1∆ mutants failed to destroy Med13, deleting the degron did not prevent destruction. These results indicate that the control of Med13 degradation following H2O2 stress is complex, being controlled simultaneously by CWI and MAPK pathways.
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Affiliation(s)
- Stephen D Willis
- Department of Molecular Biology, Graduate School of Biomedical Sciences, Rowan University, Stratford, NJ, 08084, USA
| | - David C Stieg
- Department of Molecular Biology, Graduate School of Biomedical Sciences, Rowan University, Stratford, NJ, 08084, USA
| | - Kai Li Ong
- Department of Microbiology and Molecular Biology, Brigham Young University, Provo, UT 84602, USA
| | - Ravina Shah
- Department of Molecular Biology, Graduate School of Biomedical Sciences, Rowan University, Stratford, NJ, 08084, USA.,Current address: Department of Biological Sciences, Rowan University, 201 Mullica Hill Rd, Glassboro, NJ 08028. USA
| | - Alexandra K Strich
- Department of Molecular Biology, Graduate School of Biomedical Sciences, Rowan University, Stratford, NJ, 08084, USA.,Current address: Shawnee High School, Medford, New Jersey 08055, USA
| | - Julianne H Grose
- Department of Microbiology and Molecular Biology, Brigham Young University, Provo, UT 84602, USA
| | - Katrina F Cooper
- Department of Molecular Biology, Graduate School of Biomedical Sciences, Rowan University, Stratford, NJ, 08084, USA
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114
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Dinuclear rectangular-shaped assemblies of bis-benzimidazolydine salt coordinated to Ag(I) and Cu(I) N-heterocyclic carbene complexes and their biological applications. CHEMICAL PAPERS 2018. [DOI: 10.1007/s11696-018-0538-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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115
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Muñoz-Arellano AJ, Chen X, Molt A, Meza E, Petranovic D. Different Expression Levels of Human Mutant Ubiquitin B +1 (UBB +1) Can Modify Chronological Lifespan or Stress Resistance of Saccharomyces cerevisiae. Front Mol Neurosci 2018; 11:200. [PMID: 29950972 PMCID: PMC6008557 DOI: 10.3389/fnmol.2018.00200] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Accepted: 05/18/2018] [Indexed: 11/13/2022] Open
Abstract
The ubiquitin-proteasome system (UPS) is the main pathway responsible for the degradation of misfolded proteins, and its dysregulation has been implicated in several neurodegenerative diseases, including Alzheimer's disease (AD). UBB+1, a mutant variant of ubiquitin B, was found to accumulate in neurons of AD patients and it has been linked to UPS dysfunction and neuronal death. Using the yeast Saccharomyces cerevisiae as a model system, we constitutively expressed UBB+1 to evaluate its effects on proteasome function and cell death, particularly under conditions of chronological aging. We showed that the expression of UBB+1 caused inhibition of the three proteasomal proteolytic activities (caspase-like (β1), trypsin-like (β2) and chymotrypsin-like (β5) activities) in yeast. Interestingly, this inhibition did not alter cell viability of growing cells. Moreover, we showed that cells expressing UBB+1 at lower level displayed an increased capacity to degrade induced misfolded proteins. When we evaluated cells during chronological aging, UBB+1 expression at lower level, prevented cells to accumulate reactive oxygen species (ROS) and avert apoptosis, dramatically increasing yeast life span. Since proteasome inhibition by UBB+1 has previously been shown to induce chaperone expression and thus protect against stress, we evaluated our UBB+1 model under heat shock and oxidative stress. Higher expression of UBB+1 caused thermotolerance in yeast due to induction of chaperones, which occurred to a lesser extent at lower expression level of UBB+1 (where we observed the phenotype of extended life span). Altering UPS capacity by differential expression of UBB+1 protects cells against several stresses during chronological aging. This system can be valuable to study the effects of UBB+1 on misfolded proteins involved in neurodegeneration and aging.
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Affiliation(s)
- Ana Joyce Muñoz-Arellano
- Division of Systems and Synthetic Biology, Department of Biology and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Xin Chen
- Division of Systems and Synthetic Biology, Department of Biology and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden.,Novo Nordisk Foundation Center for Biosustainability, Chalmers University of Technology, Gothenburg, Sweden
| | - Andrea Molt
- Division of Systems and Synthetic Biology, Department of Biology and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Eugenio Meza
- Division of Systems and Synthetic Biology, Department of Biology and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Dina Petranovic
- Division of Systems and Synthetic Biology, Department of Biology and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden.,Novo Nordisk Foundation Center for Biosustainability, Chalmers University of Technology, Gothenburg, Sweden
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116
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Radzinski M, Fassler R, Yogev O, Breuer W, Shai N, Gutin J, Ilyas S, Geffen Y, Tsytkin-Kirschenzweig S, Nahmias Y, Ravid T, Friedman N, Schuldiner M, Reichmann D. Temporal profiling of redox-dependent heterogeneity in single cells. eLife 2018; 7:37623. [PMID: 29869985 PMCID: PMC6023615 DOI: 10.7554/elife.37623] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Accepted: 06/04/2018] [Indexed: 01/22/2023] Open
Abstract
Cellular redox status affects diverse cellular functions, including proliferation, protein homeostasis, and aging. Thus, individual differences in redox status can give rise to distinct sub-populations even among cells with identical genetic backgrounds. Here, we have created a novel methodology to track redox status at single cell resolution using the redox-sensitive probe Grx1-roGFP2. Our method allows identification and sorting of sub-populations with different oxidation levels in either the cytosol, mitochondria or peroxisomes. Using this approach, we defined a redox-dependent heterogeneity of yeast cells and characterized growth, as well as proteomic and transcriptomic profiles of distinctive redox subpopulations. We report that, starting in late logarithmic growth, cells of the same age have a bi-modal distribution of oxidation status. A comparative proteomic analysis between these populations identified three key proteins, Hsp30, Dhh1, and Pnc1, which affect basal oxidation levels and may serve as first line of defense proteins in redox homeostasis.
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Affiliation(s)
- Meytal Radzinski
- Department of Biological Chemistry, The Alexander Silberman Institute of Life Sciences, Safra Campus Givat Ram, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Rosi Fassler
- Department of Biological Chemistry, The Alexander Silberman Institute of Life Sciences, Safra Campus Givat Ram, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Ohad Yogev
- Department of Biological Chemistry, The Alexander Silberman Institute of Life Sciences, Safra Campus Givat Ram, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - William Breuer
- Proteomics and Mass Spectrometry Unit, The Alexander Silberman Institute of Life Sciences, Safra Campus Givat Ram, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Nadav Shai
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, Israel
| | - Jenia Gutin
- Department of Biological Chemistry, The Alexander Silberman Institute of Life Sciences, Safra Campus Givat Ram, The Hebrew University of Jerusalem, Jerusalem, Israel.,School of Computer Science and Engineering, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Sidra Ilyas
- Department of Biological Chemistry, The Alexander Silberman Institute of Life Sciences, Safra Campus Givat Ram, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Yifat Geffen
- Department of Biological Chemistry, The Alexander Silberman Institute of Life Sciences, Safra Campus Givat Ram, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Sabina Tsytkin-Kirschenzweig
- Grass Center for Bioengineering, Benin School of Computer Science and Engineering, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Yaakov Nahmias
- Grass Center for Bioengineering, Benin School of Computer Science and Engineering, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Tommer Ravid
- Department of Biological Chemistry, The Alexander Silberman Institute of Life Sciences, Safra Campus Givat Ram, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Nir Friedman
- Department of Biological Chemistry, The Alexander Silberman Institute of Life Sciences, Safra Campus Givat Ram, The Hebrew University of Jerusalem, Jerusalem, Israel.,School of Computer Science and Engineering, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Maya Schuldiner
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, Israel
| | - Dana Reichmann
- Department of Biological Chemistry, The Alexander Silberman Institute of Life Sciences, Safra Campus Givat Ram, The Hebrew University of Jerusalem, Jerusalem, Israel
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117
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Tian J, Gan Y, Pan C, Zhang M, Wang X, Tang X, Peng X. Nerol-induced apoptosis associated with the generation of ROS and Ca 2+ overload in saprotrophic fungus Aspergillus flavus. Appl Microbiol Biotechnol 2018; 102:6659-6672. [PMID: 29860589 DOI: 10.1007/s00253-018-9125-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Revised: 05/10/2018] [Accepted: 05/12/2018] [Indexed: 12/12/2022]
Abstract
The contamination of food with Aspergillus flavus and subsequent aflatoxins is one of the most serious safety problems in the world. In this study of nerol (NEL)'s antifungal mechanism of action, we observed morphological and physiological changes in Aspergillus flavus. We found that NEL resulted in elevated levels of reactive oxygen species (ROS) and calcium ions (Ca2+). On ROS assays, compared with the controls, the proportion of fluorescent cells treated with concentrations of 0.25, 0.5, 1, and 2 μL/mL NEL increased to 8.4 ± 1.07%, 10.2 ± 1.72%, 13.4 ± 0.50%, and 26.2 ± 4.21%, respectively. Increased mitochondrial dysfunction and oxidative stress induced by the interactions between Ca2+ and ROS subsequently activate the release of cytochrome c and caspase activity. Characteristic changes of apoptosis were also observed via various detection methods, including phosphatidylserine externalization, nuclear condensation, and DNA fragmentation. Meanwhile, we found that the expression of CaMKs increased significantly in NEL-treated cells. In conclusion, our findings indicate that NEL has great potential as an eco-friendly antifungal agent for food preservation.
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Affiliation(s)
- Jun Tian
- College of Life Science, Jiangsu Normal University, Xuzhou, 221116, Jiangsu Province, People's Republic of China. .,Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University, Beijing, 100048, People's Republic of China. .,Key Lab for New Drug Research of TCM and Shenzhen Branch, State R&D Centre for Viro-Biotech, Research Institute of Tsinghua University in Shenzhen, Shenzhen, 518057, Guangdong, People's Republic of China.
| | - Yeyun Gan
- College of Life Science, Jiangsu Normal University, Xuzhou, 221116, Jiangsu Province, People's Republic of China
| | - Chao Pan
- College of Life Science, Jiangsu Normal University, Xuzhou, 221116, Jiangsu Province, People's Republic of China
| | - Man Zhang
- College of Life Science, Jiangsu Normal University, Xuzhou, 221116, Jiangsu Province, People's Republic of China
| | - Xueyan Wang
- Key Lab for New Drug Research of TCM and Shenzhen Branch, State R&D Centre for Viro-Biotech, Research Institute of Tsinghua University in Shenzhen, Shenzhen, 518057, Guangdong, People's Republic of China
| | - Xudong Tang
- Key Lab for New Drug Research of TCM and Shenzhen Branch, State R&D Centre for Viro-Biotech, Research Institute of Tsinghua University in Shenzhen, Shenzhen, 518057, Guangdong, People's Republic of China.
| | - Xue Peng
- College of Life Science, Jiangsu Normal University, Xuzhou, 221116, Jiangsu Province, People's Republic of China.
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118
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Programmed cell death in yeast by thionin-like peptide from Capsicum annuum fruits involving activation of caspases and extracellular H + flux. Biosci Rep 2018; 38:BSR20180119. [PMID: 29599127 PMCID: PMC5920138 DOI: 10.1042/bsr20180119] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 03/05/2018] [Accepted: 03/28/2018] [Indexed: 11/17/2022] Open
Abstract
CaThi is a thionin-like peptide isolated from fruits of Capsicum annuum, which has strong antimicrobial activity against bacteria, yeasts and filamentous fungi, and induced reactive oxygen species (ROS) in fungi. ROS are molecules that appear in the early stages of programmed cell death or apoptosis in fungi. Due to this fact, in this work we analyzed some events that may be related to process of apoptosis on yeast induced by CaThi. To investigate this possibility, we evaluated phosphatidylserine (PS) externalization, presence of active caspases and the ability of CaThi to bind to DNA in Candida tropicalis cells. Additionally, we investigated mitochondrial membrane potential, cell surface pH, and extracellular H+ fluxes in C. tropicalis cells after treatment with CaThi. Our results showed that CaThi induced PS externalization in the outer leaflet of the cell membrane, activation of caspases, and it had the ability for DNA binding and to dissipate mitochondrial membrane potential. In addition, the cell surface pH increased significantly when the C. tropicalis cells were exposed to CaThi which corroborates with ~96% inhibition on extracellular H+ efflux. Taking together, these data suggest that this peptide is capable of promoting an imbalance in pH homeostasis during yeast cell death playing a modulatory role in the H+ transport systems. In conclusion, our results strongly indicated that CaThi triggers apoptosis in C. tropicalis cells, involving a pH signaling mechanism.
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119
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Falcone C, Mazzoni C. RNA stability and metabolism in regulated cell death, aging and diseases. FEMS Yeast Res 2018; 18:4978431. [DOI: 10.1093/femsyr/foy050] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Accepted: 04/17/2018] [Indexed: 12/13/2022] Open
Affiliation(s)
- Claudio Falcone
- Pasteur Institute-Cenci Bolognetti Foundation, Department of Biology and Biotechnology “Charles Darwin”, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185-Rome, Italy
| | - Cristina Mazzoni
- Pasteur Institute-Cenci Bolognetti Foundation, Department of Biology and Biotechnology “Charles Darwin”, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185-Rome, Italy
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120
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Jung KI, Pyo CW, Choi SY. Influenza A virus-induced autophagy contributes to enhancement of virus infectivity by SOD1 downregulation in alveolar epithelial cells. Biochem Biophys Res Commun 2018; 498:960-966. [PMID: 29548827 DOI: 10.1016/j.bbrc.2018.03.089] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Accepted: 03/13/2018] [Indexed: 01/04/2023]
Abstract
Infection with influenza A virus (IAV) A/WSN/1933 (H1N1) causes oxidative stress and severe lung injury. We have demonstrated that the generation of reactive oxygen species (ROS) during IAV infection is tightly regulated by superoxide dismutase 1 (SOD1) and correlated with viral replication in alveolar epithelial cells. However, the molecular mechanism underlying SOD1 reduction during IAV infection is uncertain. Here we demonstrate that the autophagy pathway is activated by IAV infection and involved in enhanced ROS generation in the early phase of infection. We observed that IAV infection induced autophagic vacuolation, leading to autophagic degradation of cellular proteins, including the protease sensitive antioxidant SOD1. Silencing of the microtubule-associated protein 1A/1B-light chain 3 (LC3) gene in A549 cells supported the critical role of autophagy in the ROS increase. The decrease in viral titer and viral polymerase activity caused by LC3 silencing or the autophagy inhibitor clearly evidenced the involvement of autophagy in the control of ROS generation and viral infectivity. Therefore, we concluded that early stage IAV infection induces autophagic degradation of antioxidant enzyme SOD1, thereby contributing to increased ROS generation and viral infectivity in alveolar epithelial cells.
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Affiliation(s)
- Kwang Il Jung
- Department of Life Sciences, Korea University, Seoul 136-701, South Korea
| | - Chul Woong Pyo
- Department of Life Sciences, Korea University, Seoul 136-701, South Korea
| | - Sang-Yun Choi
- Department of Life Sciences, Korea University, Seoul 136-701, South Korea.
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121
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Inactivation of RAD52 and HDF1 DNA repair genes leads to premature chronological aging and cellular instability. J Biosci 2018; 42:219-230. [PMID: 28569246 DOI: 10.1007/s12038-017-9684-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The present study aims to investigate the role of radiation sensitive 52 (RAD52) and high-affinity DNA binding factor 1 (HDF1) DNA repair genes on the life span of budding yeasts during chronological aging. Wild type (wt) and rad52, hdf1, and rad52 hdf1 mutant Saccharomyces cerevisiae strains were used. Chronological aging and survival assays were studied by clonogenic assay and drop test. DNA damage was analyzed by electrophoresis after phenol extraction. Mutant analysis, colony forming units and the index of respiratory competence were studied by growing on dextrose and glycerol plates as a carbon source. Rad52 and rad52 hdf1 mutants showed a gradual decrease in surviving fraction in relation to wt and hdf1 mutant during aging. Genomic DNA was spontaneously more degraded during aging, mainly in rad52 mutants. This strain showed an increased percentage of revertant colonies. Moreover, all mutants showed a decrease in the index of respiratory competence during aging. The inactivation of RAD52 leads to premature chronological aging with an increase in DNA degradation and mutation frequency. In addition, RAD52 and HDF1 contribute to maintain the metabolic state, in a different way, during chronological aging. The results obtained could have important implications in the chronobiology of aging.
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122
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The Yeast Saccharomyces cerevisiae as a Model for Understanding RAS Proteins and their Role in Human Tumorigenesis. Cells 2018; 7:cells7020014. [PMID: 29463063 PMCID: PMC5850102 DOI: 10.3390/cells7020014] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2017] [Revised: 02/05/2018] [Accepted: 02/12/2018] [Indexed: 12/16/2022] Open
Abstract
The exploitation of the yeast Saccharomyces cerevisiae as a biological model for the investigation of complex molecular processes conserved in multicellular organisms, such as humans, has allowed fundamental biological discoveries. When comparing yeast and human proteins, it is clear that both amino acid sequences and protein functions are often very well conserved. One example of the high degree of conservation between human and yeast proteins is highlighted by the members of the RAS family. Indeed, the study of the signaling pathways regulated by RAS in yeast cells led to the discovery of properties that were often found interchangeable with RAS proto-oncogenes in human pathways, and vice versa. In this work, we performed an updated critical literature review on human and yeast RAS pathways, specifically highlighting the similarities and differences between them. Moreover, we emphasized the contribution of studying yeast RAS pathways for the understanding of human RAS and how this model organism can contribute to unveil the roles of RAS oncoproteins in the regulation of mechanisms important in the tumorigenic process, like autophagy.
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123
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Polčic P, Pakosová L, Chovančíková P, Machala Z. Reactive cold plasma particles generate oxidative stress in yeast but do not trigger apoptosis. Can J Microbiol 2018; 64:367-375. [PMID: 29438626 DOI: 10.1139/cjm-2017-0753] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Interactions of living cells with cold plasma of electrical discharges affect cell physiology, often resulting in the loss of viability. However, the mechanisms involved in cell killing are poorly understood, and dissection of cellular pathways or structures affected by plasma using simple eukaryotic models is needed. Using selected genetic mutants of yeast (Saccharomyces cerevisiae), we investigated the role of oxidative stress and yeast apoptosis in plasma-induced cell killing. Increased sensitivity of yeast strains deficient in superoxide dismutases indicated that reactive oxygen species generated in the plasma are among the most prominent factors involved in killing of yeast cells. In mutant strains with a deletion of the key components of yeast apoptotic pathway, the sensitivity of cells towards the plasma treatment remained unaffected. Yeast apoptosis, thus, does not appear to play a significant role in plasma-induced cell killing of yeast.
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Affiliation(s)
- Peter Polčic
- a Department of Biochemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská dolina CH-1, Ilkovičova 6, Bratislava 84215, Slovak Republic
| | - Lucia Pakosová
- b Division of Environmental Physics, Faculty of Mathematics, Physics, and Informatics, Comenius University in Bratislava, Mlynská dolina F2, Ilkovičova 6, Bratislava 84215, Slovak Republic
| | - Petra Chovančíková
- a Department of Biochemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská dolina CH-1, Ilkovičova 6, Bratislava 84215, Slovak Republic
| | - Zdenko Machala
- b Division of Environmental Physics, Faculty of Mathematics, Physics, and Informatics, Comenius University in Bratislava, Mlynská dolina F2, Ilkovičova 6, Bratislava 84215, Slovak Republic
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124
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Sifuentes-Franco S, Padilla-Tejeda DE, Carrillo-Ibarra S, Miranda-Díaz AG. Oxidative Stress, Apoptosis, and Mitochondrial Function in Diabetic Nephropathy. Int J Endocrinol 2018; 2018:1875870. [PMID: 29808088 PMCID: PMC5902001 DOI: 10.1155/2018/1875870] [Citation(s) in RCA: 165] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 02/07/2018] [Indexed: 12/16/2022] Open
Abstract
Diabetic nephropathy (DN) is the second most frequent and prevalent complication of diabetes mellitus (DM). The increase in the production of oxidative stress (OS) is induced by the persistent hyperglycemic state capable of producing oxidative damage to the macromolecules (lipids, carbohydrates, proteins, and nucleic acids). OS favors the production of oxidative damage to the histones of the double-chain DNA and affects expression of the DNA repairer enzyme which leads to cell death from apoptosis. The chronic hyperglycemic state unchains an increase in advanced glycation end-products (AGE) that interact through the cellular receptors to favor activation of the transcription factor NF-κB and the protein kinase C (PKC) system, leading to the appearance of inflammation, growth, and augmentation of synthesis of the extracellular matrix (ECM) in DN. The reactive oxygen species (ROS) play an important role in the pathogenesis of diabetic complications because the production of ROS increases during the persistent hyperglycemia. The primary source of the excessive production of ROS is the mitochondria with the capacity to exceed production of endogenous antioxidants. Due to the fact that the mechanisms involved in the development of DN have not been fully clarified, there are different approaches to specific therapeutic targets or adjuvant management alternatives in the control of glycemia in DN.
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Affiliation(s)
- Sonia Sifuentes-Franco
- Institute of Experimental and Clinical Therapeutics, Department of Physiology, University Health Sciences Centre, University of Guadalajara, Guadalajara, JAL, Mexico
| | - Diego Enrique Padilla-Tejeda
- Programa de Químico Farmacéutico Biotecnologo, Escuela de Ciencias de la Salud, Campus Zapopan, Universidad del Valle de México, Guadalajara, JAL, Mexico
| | - Sandra Carrillo-Ibarra
- Institute of Experimental and Clinical Therapeutics, Department of Physiology, University Health Sciences Centre, University of Guadalajara, Guadalajara, JAL, Mexico
| | - Alejandra Guillermina Miranda-Díaz
- Institute of Experimental and Clinical Therapeutics, Department of Physiology, University Health Sciences Centre, University of Guadalajara, Guadalajara, JAL, Mexico
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125
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Carmona-Gutierrez D, Bauer MA, Zimmermann A, Aguilera A, Austriaco N, Ayscough K, Balzan R, Bar-Nun S, Barrientos A, Belenky P, Blondel M, Braun RJ, Breitenbach M, Burhans WC, Büttner S, Cavalieri D, Chang M, Cooper KF, Côrte-Real M, Costa V, Cullin C, Dawes I, Dengjel J, Dickman MB, Eisenberg T, Fahrenkrog B, Fasel N, Fröhlich KU, Gargouri A, Giannattasio S, Goffrini P, Gourlay CW, Grant CM, Greenwood MT, Guaragnella N, Heger T, Heinisch J, Herker E, Herrmann JM, Hofer S, Jiménez-Ruiz A, Jungwirth H, Kainz K, Kontoyiannis DP, Ludovico P, Manon S, Martegani E, Mazzoni C, Megeney LA, Meisinger C, Nielsen J, Nyström T, Osiewacz HD, Outeiro TF, Park HO, Pendl T, Petranovic D, Picot S, Polčic P, Powers T, Ramsdale M, Rinnerthaler M, Rockenfeller P, Ruckenstuhl C, Schaffrath R, Segovia M, Severin FF, Sharon A, Sigrist SJ, Sommer-Ruck C, Sousa MJ, Thevelein JM, Thevissen K, Titorenko V, Toledano MB, Tuite M, Vögtle FN, Westermann B, Winderickx J, Wissing S, Wölfl S, Zhang ZJ, Zhao RY, Zhou B, Galluzzi L, Kroemer G, Madeo F. Guidelines and recommendations on yeast cell death nomenclature. MICROBIAL CELL (GRAZ, AUSTRIA) 2018; 5:4-31. [PMID: 29354647 PMCID: PMC5772036 DOI: 10.15698/mic2018.01.607] [Citation(s) in RCA: 122] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Accepted: 12/29/2017] [Indexed: 12/18/2022]
Abstract
Elucidating the biology of yeast in its full complexity has major implications for science, medicine and industry. One of the most critical processes determining yeast life and physiology is cel-lular demise. However, the investigation of yeast cell death is a relatively young field, and a widely accepted set of concepts and terms is still missing. Here, we propose unified criteria for the defi-nition of accidental, regulated, and programmed forms of cell death in yeast based on a series of morphological and biochemical criteria. Specifically, we provide consensus guidelines on the differ-ential definition of terms including apoptosis, regulated necrosis, and autophagic cell death, as we refer to additional cell death rou-tines that are relevant for the biology of (at least some species of) yeast. As this area of investigation advances rapidly, changes and extensions to this set of recommendations will be implemented in the years to come. Nonetheless, we strongly encourage the au-thors, reviewers and editors of scientific articles to adopt these collective standards in order to establish an accurate framework for yeast cell death research and, ultimately, to accelerate the pro-gress of this vibrant field of research.
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Affiliation(s)
| | - Maria Anna Bauer
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
| | - Andreas Zimmermann
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
| | - Andrés Aguilera
- Centro Andaluz de Biología, Molecular y Medicina Regenerativa-CABIMER, Universidad de Sevilla, Sevilla, Spain
| | | | - Kathryn Ayscough
- Department of Biomedical Science, University of Sheffield, Sheffield, United Kingdom
| | - Rena Balzan
- Department of Physiology and Biochemistry, University of Malta, Msida, Malta
| | - Shoshana Bar-Nun
- Department of Biochemistry and Molecular Biology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Antonio Barrientos
- Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, USA
- Department of Neurology, University of Miami Miller School of Medi-cine, Miami, USA
| | - Peter Belenky
- Department of Molecular Microbiology and Immunology, Brown University, Providence, USA
| | - Marc Blondel
- Institut National de la Santé et de la Recherche Médicale UMR1078, Université de Bretagne Occidentale, Etablissement Français du Sang Bretagne, CHRU Brest, Hôpital Morvan, Laboratoire de Génétique Moléculaire, Brest, France
| | - Ralf J. Braun
- Institute of Cell Biology, University of Bayreuth, Bayreuth, Germany
| | | | - William C. Burhans
- Department of Molecular and Cellular Biology, Roswell Park Cancer Institute, Buffalo, NY, USA
| | - Sabrina Büttner
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Stockholm, Sweden
| | | | - Michael Chang
- European Research Institute for the Biology of Ageing, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Katrina F. Cooper
- Dept. Molecular Biology, Graduate School of Biomedical Sciences, Rowan University, Stratford, USA
| | - Manuela Côrte-Real
- Center of Molecular and Environmental Biology, Department of Biology, University of Minho, Braga, Portugal
| | - Vítor Costa
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, Portugal
- Departamento de Biologia Molecular, Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto, Portugal
| | | | - Ian Dawes
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, Australia
| | - Jörn Dengjel
- Department of Biology, University of Fribourg, Fribourg, Switzerland
| | - Martin B. Dickman
- Institute for Plant Genomics and Biotechnology, Texas A&M University, Texas, USA
| | - Tobias Eisenberg
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
- BioTechMed Graz, Graz, Austria
| | - Birthe Fahrenkrog
- Laboratory Biology of the Nucleus, Institute for Molecular Biology and Medicine, Université Libre de Bruxelles, Charleroi, Belgium
| | - Nicolas Fasel
- Department of Biochemistry, University of Lausanne, Lausanne, Switzerland
| | - Kai-Uwe Fröhlich
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
| | - Ali Gargouri
- Laboratoire de Biotechnologie Moléculaire des Eucaryotes, Center de Biotechnologie de Sfax, Sfax, Tunisia
| | - Sergio Giannattasio
- Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies, National Research Council, Bari, Italy
| | - Paola Goffrini
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parma, Italy
| | - Campbell W. Gourlay
- Kent Fungal Group, School of Biosciences, University of Kent, Canterbury, United Kingdom
| | - Chris M. Grant
- Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, United Kingdom
| | - Michael T. Greenwood
- Department of Chemistry and Chemical Engineering, Royal Military College, Kingston, Ontario, Canada
| | - Nicoletta Guaragnella
- Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies, National Research Council, Bari, Italy
| | | | - Jürgen Heinisch
- Department of Biology and Chemistry, University of Osnabrück, Osnabrück, Germany
| | - Eva Herker
- Heinrich Pette Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany
| | | | - Sebastian Hofer
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
| | | | - Helmut Jungwirth
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
| | - Katharina Kainz
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
| | - Dimitrios P. Kontoyiannis
- Division of Internal Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Paula Ludovico
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Minho, Portugal
- ICVS/3B’s - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Stéphen Manon
- Institut de Biochimie et de Génétique Cellulaires, UMR5095, CNRS & Université de Bordeaux, Bordeaux, France
| | - Enzo Martegani
- Department of Biotechnolgy and Biosciences, University of Milano-Bicocca, Milano, Italy
| | - Cristina Mazzoni
- Instituto Pasteur-Fondazione Cenci Bolognetti - Department of Biology and Biotechnology "C. Darwin", La Sapienza University of Rome, Rome, Italy
| | - Lynn A. Megeney
- Sprott Center for Stem Cell Research, Ottawa Hospital Research Institute, The Ottawa Hospital, Ottawa, Canada
- Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, Canada
- Department of Medicine, Division of Cardiology, University of Ottawa, Ottawa, Canada
| | - Chris Meisinger
- Institute of Biochemistry and Molecular Biology, ZBMZ, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Jens Nielsen
- Department of Biology and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
- Novo Nordisk Foundation Center for Biosustainability, Chalmers University of Technology, Gothenburg, Sweden
- Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, DK2800 Lyngby, Denmark
| | - Thomas Nyström
- Institute for Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Heinz D. Osiewacz
- Institute for Molecular Biosciences, Goethe University, Frankfurt am Main, Germany
| | - Tiago F. Outeiro
- Department of Experimental Neurodegeneration, Center for Nanoscale Microscopy and Molecular Physiology of the Brain, Center for Biostructural Imaging of Neurodegeneration, University Medical Center Göttingen, Göttingen, Germany
- Max Planck Institute for Experimental Medicine, Göttingen, Germany
- Institute of Neuroscience, The Medical School, Newcastle University, Framlington Place, Newcastle Upon Tyne, NE2 4HH, United Kingdom
- CEDOC, Chronic Diseases Research Centre, NOVA Medical School, Faculdade de Ciências Médicas, Universidade NOVA de Lisboa, Lisboa, Portugal
| | - Hay-Oak Park
- Department of Molecular Genetics, The Ohio State University, Columbus, OH, USA
| | - Tobias Pendl
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
| | - Dina Petranovic
- Department of Biology and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
- Novo Nordisk Foundation Center for Biosustainability, Chalmers University of Technology, Gothenburg, Sweden
| | - Stephane Picot
- Malaria Research Unit, SMITh, ICBMS, UMR 5246 CNRS-INSA-CPE-University Lyon, Lyon, France
- Institut of Parasitology and Medical Mycology, Hospices Civils de Lyon, Lyon, France
| | - Peter Polčic
- Department of Biochemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Bratislava, Slovak Republic
| | - Ted Powers
- Department of Molecular and Cellular Biology, College of Biological Sciences, UC Davis, Davis, California, USA
| | - Mark Ramsdale
- Biosciences, University of Exeter, Exeter, United Kingdom
| | - Mark Rinnerthaler
- Department of Cell Biology and Physiology, Division of Genetics, University of Salzburg, Salzburg, Austria
| | - Patrick Rockenfeller
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
- Kent Fungal Group, School of Biosciences, University of Kent, Canterbury, United Kingdom
| | | | - Raffael Schaffrath
- Institute of Biology, Division of Microbiology, University of Kassel, Kassel, Germany
| | - Maria Segovia
- Department of Ecology, Faculty of Sciences, University of Malaga, Malaga, Spain
| | - Fedor F. Severin
- A.N. Belozersky Institute of physico-chemical biology, Moscow State University, Moscow, Russia
| | - Amir Sharon
- School of Plant Sciences and Food Security, Faculty of Life Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Stephan J. Sigrist
- Institute for Biology/Genetics, Freie Universität Berlin, Berlin, Germany
| | - Cornelia Sommer-Ruck
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
| | - Maria João Sousa
- Center of Molecular and Environmental Biology, Department of Biology, University of Minho, Braga, Portugal
| | - Johan M. Thevelein
- Laboratory of Molecular Cell Biology, Institute of Botany and Microbiology, KU Leuven, Leuven, Belgium
- Center for Microbiology, VIB, Leuven-Heverlee, Belgium
| | - Karin Thevissen
- Centre of Microbial and Plant Genetics, KU Leuven, Leuven, Belgium
| | | | - Michel B. Toledano
- Institute for Integrative Biology of the Cell (I2BC), SBIGEM, CEA-Saclay, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Mick Tuite
- Kent Fungal Group, School of Biosciences, University of Kent, Canterbury, United Kingdom
| | - F.-Nora Vögtle
- Institute of Biochemistry and Molecular Biology, ZBMZ, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | | | - Joris Winderickx
- Department of Biology, Functional Biology, KU Leuven, Leuven-Heverlee, Belgium
| | | | - Stefan Wölfl
- Institute of Pharmacy and Molecu-lar Biotechnology, Heidelberg University, Heidelberg, Germany
| | - Zhaojie J. Zhang
- Department of Zoology and Physiology, University of Wyoming, Laramie, USA
| | - Richard Y. Zhao
- Department of Pathology, University of Maryland School of Medicine, Baltimore, USA
| | - Bing Zhou
- School of Life Sciences, Tsinghua University, Beijing, China
| | - Lorenzo Galluzzi
- Department of Radiation Oncology, Weill Cornell Medical College, New York, NY, USA
- Sandra and Edward Meyer Cancer Center, New York, NY, USA
- Université Paris Descartes/Paris V, Paris, France
| | - Guido Kroemer
- Université Paris Descartes/Paris V, Paris, France
- Equipe 11 Labellisée Ligue Contre le Cancer, Centre de Recherche des Cordeliers, Paris, France
- Cell Biology and Metabolomics Platforms, Gustave Roussy Comprehensive Cancer Center, Villejuif, France
- INSERM, U1138, Paris, France
- Université Pierre et Marie Curie/Paris VI, Paris, France
- Pôle de Biologie, Hôpital Européen Georges Pompidou, Paris, France
- Institute, Department of Women’s and Children’s Health, Karolinska University Hospital, Stockholm, Sweden
| | - Frank Madeo
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
- BioTechMed Graz, Graz, Austria
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126
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Stieg DC, Willis SD, Ganesan V, Ong KL, Scuorzo J, Song M, Grose J, Strich R, Cooper KF. A complex molecular switch directs stress-induced cyclin C nuclear release through SCF Grr1-mediated degradation of Med13. Mol Biol Cell 2017; 29:363-375. [PMID: 29212878 PMCID: PMC5996960 DOI: 10.1091/mbc.e17-08-0493] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Revised: 11/22/2017] [Accepted: 12/01/2017] [Indexed: 02/03/2023] Open
Abstract
In response to oxidative stress, cells must choose either to live or to die. Here we show that the E3 ligase SCFGrr1 mediates the destruction of Med13, which releases cyclin C into the cytoplasm and results in cell death. The Med13 SCF degron is most likely primed by the Cdk8 kinase and marked for destruction by the MAPK Slt2. In response to oxidative stress, cells decide whether to mount a survival or cell death response. The conserved cyclin C and its kinase partner Cdk8 play a key role in this decision. Both are members of the Cdk8 kinase module, which, with Med12 and Med13, associate with the core mediator complex of RNA polymerase II. In Saccharomyces cerevisiae, oxidative stress triggers Med13 destruction, which thereafter releases cyclin C into the cytoplasm. Cytoplasmic cyclin C associates with mitochondria, where it induces hyperfragmentation and regulated cell death. In this report, we show that residues 742–844 of Med13’s 600–amino acid intrinsic disordered region (IDR) both directs cyclin C-Cdk8 association and serves as the degron that mediates ubiquitin ligase SCFGrr1-dependent destruction of Med13 following oxidative stress. Here, cyclin C-Cdk8 phosphorylation of Med13 most likely primes the phosphodegron for destruction. Next, pro-oxidant stimulation of the cell wall integrity pathway MAP kinase Slt2 initially phosphorylates cyclin C to trigger its release from Med13. Thereafter, Med13 itself is modified by Slt2 to stimulate SCFGrr1-mediated destruction. Taken together, these results support a model in which this IDR of Med13 plays a key role in controlling a molecular switch that dictates cell fate following exposure to adverse environments.
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Affiliation(s)
- David C Stieg
- Department of Molecular Biology, Graduate School of Biological Sciences, Rowan University, Stratford, NJ 08084
| | - Stephen D Willis
- Department of Molecular Biology, Graduate School of Biological Sciences, Rowan University, Stratford, NJ 08084
| | - Vidyaramanan Ganesan
- Department of Molecular Biology, Graduate School of Biological Sciences, Rowan University, Stratford, NJ 08084
| | - Kai Li Ong
- Department of Microbiology and Molecular Biology, Brigham Young University, Provo, UT 84602
| | - Joseph Scuorzo
- School of Osteopathic Medicine, Rowan University, Stratford, NJ 08084
| | - Mia Song
- School of Osteopathic Medicine, Rowan University, Stratford, NJ 08084
| | - Julianne Grose
- Department of Microbiology and Molecular Biology, Brigham Young University, Provo, UT 84602
| | - Randy Strich
- Department of Molecular Biology, Graduate School of Biological Sciences, Rowan University, Stratford, NJ 08084
| | - Katrina F Cooper
- Department of Molecular Biology, Graduate School of Biological Sciences, Rowan University, Stratford, NJ 08084
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127
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Ring J, Rockenfeller P, Abraham C, Tadic J, Poglitsch M, Schimmel K, Westermayer J, Schauer S, Achleitner B, Schimpel C, Moitzi B, Rechberger GN, Sigrist SJ, Carmona-Gutierrez D, Kroemer G, Büttner S, Eisenberg T, Madeo F. Mitochondrial energy metabolism is required for lifespan extension by the spastic paraplegia-associated protein spartin. MICROBIAL CELL (GRAZ, AUSTRIA) 2017; 4:411-422. [PMID: 29234670 PMCID: PMC5722644 DOI: 10.15698/mic2017.12.603] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2017] [Accepted: 11/20/2017] [Indexed: 01/11/2023]
Abstract
Hereditary spastic paraplegias, a group of neurodegenerative disorders, can be caused by loss-of-function mutations in the protein spartin. However, the physiological role of spartin remains largely elusive. Here we show that heterologous expression of human or Drosophila spartin extends chronological lifespan of yeast, reducing age-associated ROS production, apoptosis, and necrosis. We demonstrate that spartin localizes to the proximity of mitochondria and physically interacts with proteins related to mitochondrial and respiratory metabolism. Interestingly, Nde1, the mitochondrial external NADH dehydrogenase, and Pda1, the core enzyme of the pyruvate dehydrogenase complex, are required for spartin-mediated cytoprotection. Furthermore, spartin interacts with the glycolysis enhancer phospo-fructo-kinase-2,6 (Pfk26) and is sufficient to complement for PFK26-deficiency at least in early aging. We conclude that mitochondria-related energy metabolism is crucial for spartin's vital function during aging and uncover a network of specific interactors required for this function.
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Affiliation(s)
- Julia Ring
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
| | - Patrick Rockenfeller
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
- Kent Fungal Group, School of Biosciences, University of Kent, Canterbury, UK
| | - Claudia Abraham
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
| | - Jelena Tadic
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
| | - Michael Poglitsch
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
| | - Katherina Schimmel
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
- Institute of Molecular and Translational Therapeutic Strategies (IMTTS), IFB-Tx, Hannover Medical School, Hannover, Germany
| | - Julia Westermayer
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
| | - Simon Schauer
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
| | - Bettina Achleitner
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
| | - Christa Schimpel
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
- BioNanoNet Forschungsgesellschaft mbH, Graz, Austria
| | - Barbara Moitzi
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
| | - Gerald N. Rechberger
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
- Omics Center Graz, BioTechMed-Graz, Graz, Austria
| | - Stephan J. Sigrist
- Institute for Biology, Freie Universität Berlin, Berlin, Germany
- NeuroCure, Charité, Berlin, Germany
| | | | - Guido Kroemer
- BioTechMed Graz, Graz, Austria
- Cell Biology and Metabolomics Platforms, Gustave Roussy Comprehensive Cancer Center, Villejuif, France
- INSERM, U1138, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Paris, France
- Université Pierre et Marie Curie, Paris, France
- Pôle de Biologie, Hôpital Européen Georges Pompidou, Paris, France
- Karolinska Institute, Department of Women's and Children's Health, Karolinska University Hospital Stockholm, Sweden
| | - Sabrina Büttner
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Stockholm, Sweden
| | - Tobias Eisenberg
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
- BioTechMed Graz, Graz, Austria
| | - Frank Madeo
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, Graz, Austria
- BioTechMed Graz, Graz, Austria
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128
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Samanfar B, Shostak K, Moteshareie H, Hajikarimlou M, Shaikho S, Omidi K, Hooshyar M, Burnside D, Márquez IG, Kazmirchuk T, Naing T, Ludovico P, York-Lyon A, Szereszewski K, Leung C, Jin JY, Megarbane R, Smith ML, Babu M, Holcik M, Golshani A. The sensitivity of the yeast, Saccharomyces cerevisiae, to acetic acid is influenced by DOM34 and RPL36A. PeerJ 2017; 5:e4037. [PMID: 29158977 PMCID: PMC5691786 DOI: 10.7717/peerj.4037] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Accepted: 10/24/2017] [Indexed: 12/21/2022] Open
Abstract
The presence of acetic acid during industrial alcohol fermentation reduces the yield of fermentation by imposing additional stress on the yeast cells. The biology of cellular responses to stress has been a subject of vigorous investigations. Although much has been learned, details of some of these responses remain poorly understood. Members of heat shock chaperone HSP proteins have been linked to acetic acid and heat shock stress responses in yeast. Both acetic acid and heat shock have been identified to trigger different cellular responses including reduction of global protein synthesis and induction of programmed cell death. Yeast HSC82 and HSP82 code for two important heat shock proteins that together account for 1–2% of total cellular proteins. Both proteins have been linked to responses to acetic acid and heat shock. In contrast to the overall rate of protein synthesis which is reduced, the expression of HSC82 and HSP82 is induced in response to acetic acid stress. In the current study we identified two yeast genes DOM34 and RPL36A that are linked to acetic acid and heat shock sensitivity. We investigated the influence of these genes on the expression of HSP proteins. Our observations suggest that Dom34 and RPL36A influence translation in a CAP-independent manner.
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Affiliation(s)
- Bahram Samanfar
- Department of Biology and Ottawa Institute of Systems Biology, Carleton University, Ottawa, Ontario, Canada.,Agriculture and Ari-Food Canada, Ottawa Research and Development Centre (ORDC), Ottawa, Ontario, Canada
| | - Kristina Shostak
- Department of Biology and Ottawa Institute of Systems Biology, Carleton University, Ottawa, Ontario, Canada.,Agriculture and Ari-Food Canada, Ottawa Research and Development Centre (ORDC), Ottawa, Ontario, Canada
| | - Houman Moteshareie
- Department of Biology and Ottawa Institute of Systems Biology, Carleton University, Ottawa, Ontario, Canada
| | - Maryam Hajikarimlou
- Department of Biology and Ottawa Institute of Systems Biology, Carleton University, Ottawa, Ontario, Canada
| | - Sarah Shaikho
- Children's Hospital of Eastern Ontario Research Institute, Department of Pediatrics , University of Ottawa, Ottawa, Ontario, Canada
| | - Katayoun Omidi
- Department of Biology and Ottawa Institute of Systems Biology, Carleton University, Ottawa, Ontario, Canada
| | - Mohsen Hooshyar
- Department of Biology and Ottawa Institute of Systems Biology, Carleton University, Ottawa, Ontario, Canada.,Ottawa Hospital Research Institute, Center for Cancer Therapeutics, Ottawa, Ontario, Canada
| | - Daniel Burnside
- Department of Biology and Ottawa Institute of Systems Biology, Carleton University, Ottawa, Ontario, Canada
| | - Imelda Galván Márquez
- Department of Biology and Ottawa Institute of Systems Biology, Carleton University, Ottawa, Ontario, Canada
| | - Tom Kazmirchuk
- Department of Biology and Ottawa Institute of Systems Biology, Carleton University, Ottawa, Ontario, Canada
| | - Thet Naing
- Children's Hospital of Eastern Ontario Research Institute, Department of Pediatrics , University of Ottawa, Ottawa, Ontario, Canada
| | - Paula Ludovico
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Portugal
| | - Anna York-Lyon
- Department of Biology and Ottawa Institute of Systems Biology, Carleton University, Ottawa, Ontario, Canada
| | - Kama Szereszewski
- Department of Biology and Ottawa Institute of Systems Biology, Carleton University, Ottawa, Ontario, Canada.,Department of Chemistry, Carleton University, Ottawa, Ontario, Canada
| | - Cindy Leung
- Department of Biology and Ottawa Institute of Systems Biology, Carleton University, Ottawa, Ontario, Canada
| | - Jennifer Yixin Jin
- Department of Biology and Ottawa Institute of Systems Biology, Carleton University, Ottawa, Ontario, Canada
| | - Rami Megarbane
- Department of Biology and Ottawa Institute of Systems Biology, Carleton University, Ottawa, Ontario, Canada
| | - Myron L Smith
- Department of Biology and Ottawa Institute of Systems Biology, Carleton University, Ottawa, Ontario, Canada
| | - Mohan Babu
- Department of Biochemistry, Research and Innovation Centre, University of Regina, Regina, Saskatchewan, Canada
| | - Martin Holcik
- Children's Hospital of Eastern Ontario Research Institute, Department of Pediatrics , University of Ottawa, Ottawa, Ontario, Canada.,Department of Health Sciences, Carleton University, Ottawa, Ontario, Canada
| | - Ashkan Golshani
- Department of Biology and Ottawa Institute of Systems Biology, Carleton University, Ottawa, Ontario, Canada
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129
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Anticandidal activity of hetero-dinuclear copper(II) Mn(II) Schiff base and its potential action of the mechanism. World J Microbiol Biotechnol 2017; 33:202. [PMID: 29080032 DOI: 10.1007/s11274-017-2368-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Accepted: 10/14/2017] [Indexed: 12/14/2022]
Abstract
Invasive fungal infections are one of the major challenges especially for immunosuppressed patients since they are drug resistant and pathogen to patients. Therefore, developing new, efficient and nonresistant antifungal agents have been a primary focus of international research. In the current study, a novel Schiff base [hetero-dinuclear copper(II) Mn(II) complex] (SB) derivative was investigated for its anticandidal activity against Candida albicans and possible mechanisms inducing cell death. The results revealed that SB treatment induces apoptotic and necrotic pathways in C. albicans ATCC10231 strain. Intracellular reactive oxygen species production determined by 2',7'-dichlorofluorescein diacetate staining was triggered by SB and amphotericin B administrations in a dose-dependent manner. Gene expression analysis demonstrated that SB exposure resulted in regulation of critical development and stress related gene expressions. SB treatment directly upregulated expression of stress related genes, DDR48 and RIM101, while suppressed important cell signaling and antibiotic resistance acquiring related genes such as HSP90, ERG11 and EFG1. Furthermore, CaMCA1 mRNA levels were found to be significantly high in SB-treated yeast cells, indicating possible caspase-like mechanism activation. Scanning electron microscopy analysis confirmed that SB treatment led to severe cell wall integrity disruption and wrinkling. The study will encourage development of SB-based anticandidal regimens but further studies are highly warranted to understand limitations and the extended use in the routine.
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130
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Pentz JT, Taylor BP, Ratcliff WC. Apoptosis in snowflake yeast: novel trait, or side effect of toxic waste? J R Soc Interface 2017; 13:rsif.2016.0121. [PMID: 27146690 DOI: 10.1098/rsif.2016.0121] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Accepted: 04/11/2016] [Indexed: 11/12/2022] Open
Abstract
Recent experiments evolving de novo multicellularity in yeast have found that large cluster-forming genotypes also exhibit higher rates of programmed cell death (apoptosis). This was previously interpreted as the evolution of a simple form of cellular division of labour: apoptosis results in the scission of cell-cell connections, allowing snowflake yeast to produce proportionally smaller, faster-growing propagules. Through spatial simulations, Duran-Nebreda and Solé (J. R. Soc. Interface 12, 20140982 (doi:10.1073/pnas.1115323109)) develop the novel null hypothesis that apoptosis is not an adaptation, per se, but is instead caused by the accumulation of toxic metabolites in large clusters. Here we test this hypothesis by synthetically creating unicellular derivatives of snowflake yeast through functional complementation with the ancestral ACE2 allele. We find that multicellular snowflake yeast with elevated apoptosis exhibit a similar rate of apoptosis when cultured as single cells. We also show that larger snowflake yeast clusters tend to contain a greater fraction of older, senescent cells, which may explain why larger clusters of a given genotype are more apoptotic. Our results show that apoptosis is not caused by side effects of spatial structure, such as starvation or waste product accumulation, and are consistent with the hypothesis that elevated apoptosis is a trait that co-evolves with large cluster size.
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Affiliation(s)
- Jennifer T Pentz
- School of Biology, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Bradford P Taylor
- School of Physics, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - William C Ratcliff
- School of Biology, Georgia Institute of Technology, Atlanta, GA 30332, USA
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131
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Berterame NM, Bertagnoli S, Codazzi V, Porro D, Branduardi P. Temperature-induced lipocalin (TIL): a shield against stress-inducing environmental shocks in Saccharomyces cerevisiae. FEMS Yeast Res 2017; 17:4056149. [PMID: 28830085 DOI: 10.1093/femsyr/fox056] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Accepted: 07/27/2017] [Indexed: 11/14/2022] Open
Abstract
The yeast Saccharomyces cerevisiae is a well-established workhorse, either for recombinant or natural products, thanks to its natural traits and easily editable metabolism. However, during a bio-based industrial process it meets multiple stresses generated by operative conditions such as non-optimal temperature, pH, oxygenation and product accumulation. The development of tolerant strains is therefore indispensable for the improvement of production, yield and productivity of fermentative processes. In this regard, plants as resilient organisms are a generous source for fishing genes and/or metabolites that can help the cell factory to counteract environmental constraints. Plants possess proteins named temperature-induced lipocalins, TIL, whose levels in the cells correlates with the tolerance to sudden temperature changes and with the scavenging of reactive oxygen species. In this work, the gene encoding for the Arabidopsis thaliana TIL protein was for the first time expressed in S. cerevisiae. The recombinant strain was compared and analysed against the parental counterpart under heat shock, freezing, exposure to organic acid and oxidative agents. In all the tested conditions, TIL expression conferred a higher tolerance to the stress imposed, making this strain a promising candidate for the development of robust cell factories able to overtake the major impairments of industrial processes.
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Affiliation(s)
- Nadia Maria Berterame
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milan 20126, Italy
| | - Stefano Bertagnoli
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milan 20126, Italy
| | - Vera Codazzi
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milan 20126, Italy
| | - Danilo Porro
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milan 20126, Italy
| | - Paola Branduardi
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milan 20126, Italy
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132
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Zhu S, Luo F, Zhu B, Wang GX. Mitochondrial impairment and oxidative stress mediated apoptosis induced by α-Fe 2O 3 nanoparticles in Saccharomyces cerevisiae. Toxicol Res (Camb) 2017; 6:719-728. [PMID: 30090539 PMCID: PMC6062213 DOI: 10.1039/c7tx00123a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Accepted: 07/17/2017] [Indexed: 11/21/2022] Open
Abstract
In this study, the potential toxicity of α-Fe2O3-NPs was investigated using a unicellular eukaryote model, Saccharomyces cerevisiae (S. cerevisiae). The results showed that cell viability and proliferation were significantly decreased (p < 0.01) following exposure to 100-600 mg L-1 for 24 h. The IC50 and LC50 values were 352 and 541 mg L-1, respectively. Toxic effects were attributed to α-Fe2O3-NPs rather than iron ions released from the NPs. α-Fe2O3-NPs were accumulated in the vacuole and cytoplasm, and the maximum accumulation (3.95 mg g-1) was reached at 12 h. About 48.6% of cells underwent late apoptosis/necrosis at 600 mg L-1, and the mitochondrial transmembrane potential was significantly decreased (p < 0.01) at 50-600 mg L-1. Biomarkers of oxidative stress [reactive oxygen species (ROS), superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPx)] and the expression of apoptosis-related genes (Yca1, Nma111, Nuc1 and SOD) were significantly changed after exposure. These combined results indicated that α-Fe2O3-NPs were rapidly internalized in S. cerevisiae, and the accumulated NPs induced cell apoptosis mediated by mitochondrial impairment and oxidative stress.
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Affiliation(s)
- Song Zhu
- College of Animal Science and Technology , Northwest A&F University , Yangling 712100 , China . ; ; ; Tel: +86 29 87092102
| | - Fei Luo
- College of Animal Science and Technology , Northwest A&F University , Yangling 712100 , China . ; ; ; Tel: +86 29 87092102
| | - Bin Zhu
- College of Animal Science and Technology , Northwest A&F University , Yangling 712100 , China . ; ; ; Tel: +86 29 87092102
| | - Gao-Xue Wang
- College of Animal Science and Technology , Northwest A&F University , Yangling 712100 , China . ; ; ; Tel: +86 29 87092102
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133
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Eid R, Zhou DR, Arab NTT, Boucher E, Young PG, Mandato CA, Greenwood MT. Heterologous expression of anti-apoptotic human 14-3-3β/α enhances iron-mediated programmed cell death in yeast. PLoS One 2017; 12:e0184151. [PMID: 28854230 PMCID: PMC5576682 DOI: 10.1371/journal.pone.0184151] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2017] [Accepted: 08/20/2017] [Indexed: 01/06/2023] Open
Abstract
The induction of Programmed Cell Death (PCD) requires the activation of complex responses involving the interplay of a variety of different cellular proteins, pathways, and processes. Uncovering the mechanisms regulating PCD requires an understanding of the different processes that both positively and negatively regulate cell death. Here we have examined the response of normal as well as PCD resistant yeast cells to different PCD inducing stresses. As expected cells expressing the pro-survival human 14-3-3β/α sequence show increased resistance to numerous stresses including copper and rapamycin. In contrast, other stresses including iron were more lethal in PCD resistant 14-3-3β/α expressing cells. The increased sensitivity to PCD was not iron and 14-3-3β/α specific since it was also observed with other stresses (hydroxyurea and zinc) and other pro-survival sequences (human TC-1 and H-ferritin). Although microscopical examination revealed little differences in morphology with iron or copper stresses, cells undergoing PCD in response to high levels of prolonged copper treatment were reduced in size. This supports the interaction some forms of PCD have with the mechanisms regulating cell growth. Analysis of iron-mediated effects in yeast mutant strains lacking key regulators suggests that a functional vacuole is required to mediate the synergistic effects of iron and 14-3-3β/α on yeast PCD. Finally, mild sub-lethal levels of copper were found to attenuate the observed inhibitory effects of iron. Taken together, we propose a model in which a subset of stresses like iron induces a complex process that requires the cross-talk of two different PCD inducing pathways.
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Affiliation(s)
- Rawan Eid
- Department of Chemistry and Chemical Engineering, Royal Military College, Kingston, Ontario, Canada
- Department of Biology, Queen's University, Kingston, Ontario, Canada
| | - David R. Zhou
- Department of Anatomy and Cell Biology, McGill University, Montreal, Quebec, Canada
| | - Nagla T. T. Arab
- Department of Chemistry and Chemical Engineering, Royal Military College, Kingston, Ontario, Canada
- Department of Biology, Queen's University, Kingston, Ontario, Canada
| | - Eric Boucher
- Department of Anatomy and Cell Biology, McGill University, Montreal, Quebec, Canada
| | - Paul G. Young
- Department of Biology, Queen's University, Kingston, Ontario, Canada
| | - Craig A. Mandato
- Department of Anatomy and Cell Biology, McGill University, Montreal, Quebec, Canada
| | - Michael T. Greenwood
- Department of Chemistry and Chemical Engineering, Royal Military College, Kingston, Ontario, Canada
- * E-mail:
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134
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Khan SN, Khan S, Iqbal J, Khan R, Khan AU. Enhanced Killing and Antibiofilm Activity of Encapsulated Cinnamaldehyde against Candida albicans. Front Microbiol 2017; 8:1641. [PMID: 28900419 PMCID: PMC5581813 DOI: 10.3389/fmicb.2017.01641] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Accepted: 08/14/2017] [Indexed: 11/23/2022] Open
Abstract
Candida sp. impelled opportunistic infection in immune-compromised patients ensuing from asymptomatic colonization to pathogenic forms. Moreover, slow spread of Candida species inducing refractory mucosal and invasive infections brings acute resistance to antifungal drugs. Hence, here we probed the effect of encapsulated preparation of cinnamaldehyde (CNMA) in multilamellar liposomes (ML) against Candida albicans. The efficacy of ML-CNMA against Candida biofilm was assessed by scanning electron microscopy, transmission electron microscopy, as well as light microscopy and its percent inhibition, was determined by XTT [2,3-bis-(2-methoxy-4-nitro-5-sulfophenyl)-2H-tetrazolium-5-carboxanilide] and crystal violet assay. ML-CNMA showed more fungicidal activity than free CNMA as well as multilamellar liposomal amphotericin B (ML-Amp B), which was further confirmed by spot test assay and Log-logistic dose–response analysis. Antifungal activity was driven by reactive oxygen species and cellular damage by sustained release of CNMA. Effect on hyphal formation during 48 h in presence/absence of ML-CNMA was observed under a microscope and further substantiated by RT-PCR by amplifying HWP1, the gene responsible for hyphal wall protein formation. Apoptotic programmed cell death was analyzed by FACS analysis which was further confirmed by cytochrome C release assay. This study elucidates the mechanistic insight of the enhanced antifungal activity of ML preparation of CNMA against Candida infections.
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Affiliation(s)
- Shahper N Khan
- Interdisciplinary Biotechnology Unit, Aligarh Muslim UniversityAligarh, India
| | - Shakir Khan
- Interdisciplinary Biotechnology Unit, Aligarh Muslim UniversityAligarh, India
| | - Jawed Iqbal
- Interdisciplinary Biotechnology Unit, Aligarh Muslim UniversityAligarh, India
| | - Rosina Khan
- Interdisciplinary Biotechnology Unit, Aligarh Muslim UniversityAligarh, India
| | - Asad U Khan
- Interdisciplinary Biotechnology Unit, Aligarh Muslim UniversityAligarh, India
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135
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Yeast caspase-dependent apoptosis in Saccharomyces cerevisiae BY4742 induced by antifungal and potential antitumor agent clotrimazole. Arch Microbiol 2017; 200:97-106. [PMID: 28819786 DOI: 10.1007/s00203-017-1425-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2017] [Revised: 07/25/2017] [Accepted: 08/07/2017] [Indexed: 12/11/2022]
Abstract
Clotrimazole is an antifungal medication commonly used in the treatment of fungal infections. There is also promising research on using clotrimazole against other diseases such as malaria, beriberi, tineapedis and cancer. It was aimed to investigate the apoptotic phenotype in Saccharomyces cerevisiae induced by clotrimazole. The exposure of S. cerevisiae to 10 µM clotrimazole for 3, 6 and 9 h caused to decrease in cell viability by 24.82 ± 0.81, 56.00 ± 1.54 and 77.59 ± 0.53%, respectively. It was shown by Annexin V-PI assay that 110 µM clotrimazole treatment caused to death by 35.5 ± 2.48% apoptotic and only 13.1 ± 0.08% necrotic pathway within 30 min. The occurrence of DNA strand breaks and condensation could be visualised by the TUNEL and DAPI stainings, respectively. Yeast caspase activity was induced 12.34 ± 0.71-fold after 110 µM clotrimazole treatment for 30 min compared to the control. The dependency of clotrimazole-induced apoptosis to caspase was also shown using Δyca1 mutant.
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136
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Boone CHT, Grove RA, Adamcova D, Seravalli J, Adamec J. Oxidative stress, metabolomics profiling, and mechanism of local anesthetic induced cell death in yeast. Redox Biol 2017; 12:139-149. [PMID: 28236766 PMCID: PMC5328717 DOI: 10.1016/j.redox.2017.01.025] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Revised: 01/17/2017] [Accepted: 01/19/2017] [Indexed: 11/23/2022] Open
Abstract
The World Health Organization designates lidocaine as an essential medicine in healthcare, greatly increasing the probability of human exposure. Its use has been associated with ROS generation and neurotoxicity. Physiological and metabolomic alterations, and genetics leading to the clinically observed adverse effects have not been temporally characterized. To study alterations that may lead to these undesirable effects, Saccharomyces cerevisiae grown on aerobic carbon sources to stationary phase was assessed over 6h. Exposure of an LC50 dose of lidocaine, increased mitochondrial depolarization and ROS/RNS generation assessed using JC-1, ROS/RNS specific probes, and FACS. Intracellular calcium also increased, assessed by ICP-MS. Measurement of the relative ATP and ADP concentrations indicates an initial 3-fold depletion of ATP suggesting an alteration in the ATP:ADP ratio. At the 6h time point the lidocaine exposed population contained ATP concentrations roughly 85% that of the negative control suggesting the surviving population adapted its metabolic pathways to, at least partially restore cellular bioenergetics. Metabolite analysis indicates an increase of intermediates in the pentose phosphate pathway, the preparatory phase of glycolysis, and NADPH. Oxidative stress produced by lidocaine exposure targets aconitase decreasing its activity with an observed decrease in isocitrate and an increase citrate. Similarly, increases in α-ketoglutarate, malate, and oxaloacetate imply activation of anaplerotic reactions. Antioxidant molecule glutathione and its precursor amino acids, cysteine and glutamate were greatly increased at later time points. Phosphatidylserine externalization suggestive of early phase apoptosis was also observed. Genetic studies using metacaspase null strains showed resistance to lidocaine induced cell death. These data suggest lidocaine induces perpetual mitochondrial depolarization, ROS/RNS generation along with increased glutathione to combat the oxidative cellular environment, glycolytic to PPP cycling of carbon generating NADPH, obstruction of carbon flow through the TCA cycle, decreased ATP generation, and metacaspase dependent apoptotic cell death.
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Affiliation(s)
- Cory H T Boone
- Department of Biochemistry and Redox Biology Center, University of Nebraska - Lincoln, Lincoln, NE, United States of America
| | - Ryan A Grove
- Department of Biochemistry and Redox Biology Center, University of Nebraska - Lincoln, Lincoln, NE, United States of America
| | - Dana Adamcova
- Department of Biochemistry and Redox Biology Center, University of Nebraska - Lincoln, Lincoln, NE, United States of America
| | - Javier Seravalli
- Department of Biochemistry and Redox Biology Center, University of Nebraska - Lincoln, Lincoln, NE, United States of America
| | - Jiri Adamec
- Department of Biochemistry and Redox Biology Center, University of Nebraska - Lincoln, Lincoln, NE, United States of America.
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137
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Cárdenas-Zúñiga R, Silva-Olivares A, Villalba-Magdaleno JDA, Sánchez-Monroy V, Serrano-Luna J, Shibayama M. Amphotericin B induces apoptosis-like programmed cell death in Naegleria fowleri and Naegleria gruberi. MICROBIOLOGY-SGM 2017; 163:940-949. [PMID: 28721850 DOI: 10.1099/mic.0.000500] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Naegleria fowleri and Naegleria gruberi belong to the free-living amoebae group. It is widely known that the non-pathogenic species N. gruberi is usually employed as a model to describe molecular pathways in this genus, mainly because its genome has been recently described. However, N. fowleri is an aetiological agent of primary amoebic meningoencephalitis, an acute and fatal disease. Currently, the most widely used drug for its treatment is amphotericin B (AmB). It was previously reported that AmB has an amoebicidal effect in both N. fowleri and N. gruberi trophozoites by inducing morphological changes that resemble programmed cell death (PCD). PCD is a mechanism that activates morphological, biochemical and genetic changes. However, PCD has not yet been characterized in the genus Naegleria. The aim of the present work was to evaluate the typical markers to describe PCD in both amoebae. These results showed that treated trophozoites displayed several parameters of apoptosis-like PCD in both species. We observed ultrastructural changes, an increase in reactive oxygen species, phosphatidylserine externalization and a decrease in intracellular potassium, while DNA degradation was evaluated using the TUNEL assay and agarose gels, and all of these parameters are related to PCD. Finally, we analysed the expression of apoptosis-related genes, such as sir2 and atg8, in N. gruberi. Taken together, our results showed that AmB induces the morphological, biochemical and genetic changes of apoptosis-like PCD in the genus Naegleria.
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Affiliation(s)
- Roberto Cárdenas-Zúñiga
- Department of Infectomics and Molecular Pathogenesis, Center for Research and Advanced Studies of the National Polytechnic Institute, Av. IPN 2508, San Pedro Zacatenco, 07360, Mexico City, Mexico
| | - Angélica Silva-Olivares
- Department of Infectomics and Molecular Pathogenesis, Center for Research and Advanced Studies of the National Polytechnic Institute, Av. IPN 2508, San Pedro Zacatenco, 07360, Mexico City, Mexico
| | | | - Virginia Sánchez-Monroy
- Laboratorio de Biomedicina Molecular, Escuela Nacional de Medicina y Homeopatía, Instituto Politénico Nacional, Calle Guillermo Massieu H. 239, Col. La Escalera, 07320, Mexico City, Mexico
| | - Jesús Serrano-Luna
- Department of Cell Biology, Center for Research and Advanced Studies of the National Polytechnic Institute, Av. IPN 2508, San Pedro Zacatenco, 07360, Mexico City, Mexico
| | - Mineko Shibayama
- Department of Infectomics and Molecular Pathogenesis, Center for Research and Advanced Studies of the National Polytechnic Institute, Av. IPN 2508, San Pedro Zacatenco, 07360, Mexico City, Mexico
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138
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Robinson C, Denison C, Burkenstock A, Nutter C, Gordon D. Cellular conditions that modulate the fungicidal activity of occidiofungin. J Appl Microbiol 2017; 123:380-391. [DOI: 10.1111/jam.13496] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Revised: 04/07/2017] [Accepted: 05/23/2017] [Indexed: 01/14/2023]
Affiliation(s)
- C.A. Robinson
- Department of Biological Sciences; Mississippi State University; Mississippi State MS USA
| | - C. Denison
- Department of Biological Sciences; Mississippi State University; Mississippi State MS USA
| | - A. Burkenstock
- Department of Biological Sciences; Mississippi State University; Mississippi State MS USA
| | - C. Nutter
- Department of Biological Sciences; Mississippi State University; Mississippi State MS USA
| | - D.M. Gordon
- Department of Biological Sciences; Mississippi State University; Mississippi State MS USA
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139
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Mihoubi W, Sahli E, Gargouri A, Amiel C. FTIR spectroscopy of whole cells for the monitoring of yeast apoptosis mediated by p53 over-expression and its suppression by Nigella sativa extracts. PLoS One 2017; 12:e0180680. [PMID: 28704406 PMCID: PMC5507515 DOI: 10.1371/journal.pone.0180680] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Accepted: 06/19/2017] [Indexed: 01/06/2023] Open
Abstract
p53 over expression in yeast results in cell death with typical markers of apoptosis such as DNA fragmentation and phosphatidylserine externalization. We aimed to substitute/supplement classical fluorescent techniques (TUNEL, Annexin V, ROS detection) usually used to detect biochemical changes occurring during yeast apoptosis mediated by p53 over expression and the effect of anti-apoptotic purified molecules from Nigel (Nigella sativa) extracts on these same yeasts by the label free technique of FTIR spectroscopy. The comparison of the entire IR spectra highlighted clear modifications between apoptotic p53-expressing yeasts and normal ones. More precisely, DNA damage was detected by the decrease of band intensities at 1079 and 1048 cm-1. While phosphatidylserine exposure was followed by the increase of νsCH2 and νasCH2 bands of unsaturated fatty acids that were exhibited at 2855 and 2926 cm-1, and the appearance of the C = O ester functional group band at 1740 cm-1. In a second step, this FTIR approach was used to estimate the effect of a purified fraction of the Nigel extract. The modulation of band intensities specific to DNA and membrane status was in agreement with apoptosis supression in presence of the Nigel extracts. FTIR spectroscopy is thus proven to be a very reliable technique to monitor the apoptotic cell death in yeast and to be used as a means of evaluating the biomolecules effect on yeast survival.
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Affiliation(s)
- Wafa Mihoubi
- Laboratoire de Biotechnologie Moléculaire des Eucaryotes, Centre de Biotechnologie de Sfax, Sfax, Tunisia
- * E-mail:
| | - Emna Sahli
- Laboratoire de Biotechnologie Moléculaire des Eucaryotes, Centre de Biotechnologie de Sfax, Sfax, Tunisia
| | - Ali Gargouri
- Laboratoire de Biotechnologie Moléculaire des Eucaryotes, Centre de Biotechnologie de Sfax, Sfax, Tunisia
| | - Caroline Amiel
- Unité de Recherche Aliments Bioprocédés Toxicologie Environnements (UR ABTE) EA 4651, Université de Caen Normandie, Boulevard Maréchal Juin, Caen, France
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140
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Yasa SR, Poornachandra Y, Kumar CG, Penumarthy V. Synthesis, characterization, antimicrobial and anti-biofilm activity of a new class of 11-bromoundecanoic acid-based betaines. Med Chem Res 2017. [DOI: 10.1007/s00044-017-1958-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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141
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Zhu S, Luo F, Zhu B, Wang GX. Toxicological effects of graphene oxide on Saccharomyces cerevisiae. Toxicol Res (Camb) 2017; 6:535-543. [PMID: 30090522 PMCID: PMC6060721 DOI: 10.1039/c7tx00103g] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Accepted: 05/08/2017] [Indexed: 11/21/2022] Open
Abstract
Using Saccharomyces cerevisiae as an experimental model, the potential toxicity of graphene oxide (GO) was evaluated following exposure to 0-600 mg L-1 for 24 h. The results showed that cell proliferation was observably inhibited and the IC50 value was 352.704 mg L-1. Mortality showed a concentration-dependent increase, and was 19.3% at 600 mg L-1. A small number of cells were deformed and shrunken after exposure. The percentage of late apoptosis/necrosis showed a significant increase (p < 0.01) at 600 mg L-1 (19.16%) compared with the control (1.14%). The mitochondrial transmembrane potential was significantly decreased (p < 0.01) at 50-600 mg L-1, indicating that the apoptosis was related to mitochondrial impairment. Moreover, ROS was observably increased (p < 0.01) at 200, 400 and 600 mg L-1. The expressions of apoptosis-related genes (SOD, Yca1, Nma111 and Nuc1) were significantly changed. The results presented so far indicate that GO has the potential to cause adverse effects on organisms when released into the environment.
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Affiliation(s)
- Song Zhu
- College of Animal Science and Technology , Northwest A&F University , Yangling 712100 , China . ; ; ; Tel: +86 29 87092102
| | - Fei Luo
- College of Animal Science and Technology , Northwest A&F University , Yangling 712100 , China . ; ; ; Tel: +86 29 87092102
| | - Bin Zhu
- College of Animal Science and Technology , Northwest A&F University , Yangling 712100 , China . ; ; ; Tel: +86 29 87092102
| | - Gao-Xue Wang
- College of Animal Science and Technology , Northwest A&F University , Yangling 712100 , China . ; ; ; Tel: +86 29 87092102
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142
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Vázquez J, González B, Sempere V, Mas A, Torija MJ, Beltran G. Melatonin Reduces Oxidative Stress Damage Induced by Hydrogen Peroxide in Saccharomyces cerevisiae. Front Microbiol 2017; 8:1066. [PMID: 28663741 PMCID: PMC5471302 DOI: 10.3389/fmicb.2017.01066] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Accepted: 05/29/2017] [Indexed: 12/15/2022] Open
Abstract
Melatonin (N-acetyl-5-methoxytryptamine), which is synthesized from tryptophan, is formed during alcoholic fermentation, though its role in yeast is unknown. This study employed Saccharomyces cerevisiae as an eukaryote model to evaluate the possible effects of melatonin supplementation on endogenous cellular defense systems by measuring its effects on various cellular targets. Cell viability, intracellular reduced and oxidized glutathione levels (GSH and GSSG, respectively), reactive oxygen species (ROS) production, and expression of genes related to antioxidant defense in yeast, such as the glutathione system, catalase, superoxide dismutase, glutaredoxin, and thioredoxin, were assessed. Melatonin alone decreased GSH, increased GSSG, and activated antioxidant defense system genes, which reached maximum levels in the stationary phase. These results indicate that melatonin supplementation enables cells to resist better the stress generated in the stationary phase. However, when cells were subjected to oxidative stress induced by H2O2, melatonin was able to partially mitigate cell damage by decreasing ROS accumulation and GSH and increasing GSSG; this was followed by enhanced cell viability after stress exposure, mostly when occurring in the early stationary phase. Additionally, under such conditions, most genes related to endogenous antioxidant defense continued to be up-regulated with melatonin supplementation. The findings demonstrate that melatonin can act as antioxidant in S. cerevisiae.
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Affiliation(s)
- Jennifer Vázquez
- Departament de Bioquímica i Biotecnologia, Facultat d'Enologia, Universitat Rovira i VirgiliTarragona, Spain
| | - Beatriz González
- Departament de Bioquímica i Biotecnologia, Facultat d'Enologia, Universitat Rovira i VirgiliTarragona, Spain
| | - Verónica Sempere
- Departament de Bioquímica i Biotecnologia, Facultat d'Enologia, Universitat Rovira i VirgiliTarragona, Spain
| | - Albert Mas
- Departament de Bioquímica i Biotecnologia, Facultat d'Enologia, Universitat Rovira i VirgiliTarragona, Spain
| | - María Jesús Torija
- Departament de Bioquímica i Biotecnologia, Facultat d'Enologia, Universitat Rovira i VirgiliTarragona, Spain
| | - Gemma Beltran
- Departament de Bioquímica i Biotecnologia, Facultat d'Enologia, Universitat Rovira i VirgiliTarragona, Spain
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143
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Stekovic S, Ruckenstuhl C, Royer P, Winkler-Hermaden C, Carmona-Gutierrez D, Fröhlich KU, Kroemer G, Madeo F. The neuroprotective steroid progesterone promotes mitochondrial uncoupling, reduces cytosolic calcium and augments stress resistance in yeast cells. MICROBIAL CELL (GRAZ, AUSTRIA) 2017; 4:191-199. [PMID: 28660203 PMCID: PMC5473691 DOI: 10.15698/mic2017.06.577] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Accepted: 05/22/2017] [Indexed: 11/13/2022]
Abstract
The steroid hormone progesterone is not only a crucial sex hormone, but also serves as a neurosteroid, thus playing an important role in brain function. Epidemiological data suggest that progesterone improves the recovery of patients after traumatic brain injury. Brain injuries are often connected to elevated calcium spikes, reactive oxygen species (ROS) and programmed cell death affecting neurons. Here, we establish a yeast model to study progesterone-mediated cytoprotection. External supply of progesterone protected yeast cells from apoptosis-inducing stress stimuli and resulted in elevated mitochondrial oxygen uptake accompanied by a drop in ROS generation and ATP levels during chronological aging. In addition, cellular Ca2+ concentrations were reduced upon progesterone treatment, and this effect occurred independently of known Ca2+ transporters and mitochondrial respiration. All effects were also independent of Dap1, the yeast orthologue of the progesterone receptor. Altogether, our observations provide new insights into the cytoprotective effects of progesterone.
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Affiliation(s)
- Slaven Stekovic
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, 8010 Graz, Austria
| | - Christoph Ruckenstuhl
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, 8010 Graz, Austria
| | - Philipp Royer
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, 8010 Graz, Austria
| | | | | | - Kai-Uwe Fröhlich
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, 8010 Graz, Austria
| | - Guido Kroemer
- Equipe 11 labellisée par la Ligue contre le Cancer, Centre de Recherche des Cordeliers, Paris, France
- Karolinska Institute, Department of Women's and Children's Health, Karolinska University Hospital, 17176 Stockholm, Sweden
| | - Frank Madeo
- Institute of Molecular Biosciences, NAWI Graz, University of Graz, 8010 Graz, Austria
- BioTechMed Graz, Austria
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144
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Furuta R, Kurake N, Ishikawa K, Takeda K, Hashizume H, Kondo H, Ohta T, Ito M, Sekine M, Hori M. Intracellular-molecular changes in plasma-irradiated budding yeast cells studied using multiplex coherent anti-Stokes Raman scattering microscopy. Phys Chem Chem Phys 2017; 19:13438-13442. [PMID: 28503685 DOI: 10.1039/c7cp00489c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Interactions between non-equilibrium atmospheric-pressure plasma (NEAPP) and living cells were examined using multiplex coherent anti-Stokes Raman scattering (CARS) microscopy. Our multiplex CARS analyses revealed that NEAPP irradiation generates short-lived radicals that induce a decrease in the mitochondrial activity of budding yeast cells.
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Affiliation(s)
- Ryo Furuta
- Graduate School of Engineering, Nagoya University, Furo-cho Chikusa-ku, Nagoya 464-8603, Japan.
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145
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Lovato FL, Teixeira da Rocha JB, Dalla Corte CL. Diphenyl Diselenide Protects against Methylmercury-Induced Toxicity in Saccharomyces cerevisiae via the Yap1 Transcription Factor. Chem Res Toxicol 2017; 30:1134-1144. [DOI: 10.1021/acs.chemrestox.6b00449] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Fabricio Luís Lovato
- Departamento
de Bioquímica e Biologia Molecular, Programa de Pós-graduação
em Ciências Biológicas: Bioquímica Toxicológica,
Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Cep 97105-900 Santa Maria, RS, Brazil
| | - João Batista Teixeira da Rocha
- Departamento
de Bioquímica e Biologia Molecular, Programa de Pós-graduação
em Ciências Biológicas: Bioquímica Toxicológica,
Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Cep 97105-900 Santa Maria, RS, Brazil
| | - Cristiane Lenz Dalla Corte
- Departamento
de Bioquímica e Biologia Molecular, Programa de Pós-graduação
em Ciências Biológicas: Bioquímica Toxicológica,
Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, Cep 97105-900 Santa Maria, RS, Brazil
- Universidade Federal do Pampa, Campus
Caçapava do Sul, Av. Pedro Anunciação, 111, Vila
Batista, 96570-000 Caçapava do Sul, RS, Brazil
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146
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Orlandi I, Stamerra G, Strippoli M, Vai M. During yeast chronological aging resveratrol supplementation results in a short-lived phenotype Sir2-dependent. Redox Biol 2017; 12:745-754. [PMID: 28412652 PMCID: PMC5397018 DOI: 10.1016/j.redox.2017.04.015] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Revised: 04/05/2017] [Accepted: 04/08/2017] [Indexed: 01/13/2023] Open
Abstract
Resveratrol (RSV) is a naturally occurring polyphenolic compound endowed with interesting biological properties/functions amongst which are its activity as an antioxidant and as Sirtuin activating compound towards SIRT1 in mammals. Sirtuins comprise a family of NAD+-dependent protein deacetylases that are involved in many physiological and pathological processes including aging and age-related diseases. These enzymes are conserved across species and SIRT1 is the closest mammalian orthologue of Sir2 of Saccharomyces cerevisiae. In the field of aging researches, it is well known that Sir2 is a positive regulator of replicative lifespan and, in this context, the RSV effects have been already examined. Here, we analyzed RSV effects during chronological aging, in which Sir2 acts as a negative regulator of chronological lifespan (CLS). Chronological aging refers to quiescent cells in stationary phase; these cells display a survival-based metabolism characterized by an increase in oxidative stress. We found that RSV supplementation at the onset of chronological aging, namely at the diauxic shift, increases oxidative stress and significantly reduces CLS. CLS reduction is dependent on Sir2 presence both in expired medium and in extreme Calorie Restriction. In addition, all data point to an enhancement of Sir2 activity, in particular Sir2-mediated deacetylation of the key gluconeogenic enzyme phosphoenolpyruvate carboxykinase (Pck1). This leads to a reduction in the amount of the acetylated active form of Pck1, whose enzymatic activity is essential for gluconeogenesis and CLS extension.
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Affiliation(s)
- Ivan Orlandi
- SYSBIO Centre for Systems Biology Milano, Dipartimento di Biotecnologie e Bioscienze, Università di Milano-Bicocca, Piazza della Scienza 2, 20126 Milano, Italy.
| | - Giulia Stamerra
- SYSBIO Centre for Systems Biology Milano, Dipartimento di Biotecnologie e Bioscienze, Università di Milano-Bicocca, Piazza della Scienza 2, 20126 Milano, Italy.
| | - Maurizio Strippoli
- SYSBIO Centre for Systems Biology Milano, Dipartimento di Biotecnologie e Bioscienze, Università di Milano-Bicocca, Piazza della Scienza 2, 20126 Milano, Italy.
| | - Marina Vai
- SYSBIO Centre for Systems Biology Milano, Dipartimento di Biotecnologie e Bioscienze, Università di Milano-Bicocca, Piazza della Scienza 2, 20126 Milano, Italy.
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147
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Stirpe M, Palermo V, Bianchi MM, Silvestri R, Falcone C, Tenore G, Novellino E, Mazzoni C. Annurca apple (M. pumila Miller cv Annurca) extracts act against stress and ageing in S. cerevisiae yeast cells. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2017; 17:200. [PMID: 28381226 PMCID: PMC5381082 DOI: 10.1186/s12906-017-1666-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Accepted: 03/06/2017] [Indexed: 01/01/2023]
Abstract
BACKGROUND During the past years, a number of studies have demonstrated the positive effect of apple on ageing and different diseases such as cancer, degenerative and cardiovascular diseases. The unicellular yeast Saccharomyces cerevisiae represents a simple eukaryotic model to study the effects of different compounds on lifespan. We previously demonstrated that apple extracts have anti-ageing effects in this organism because of their antioxidant properties. In particular, the effect is related to the presence in this fruit of polyphenols, which give a large contribution to the antioxidant activity of apples. METHODS We we used a clonogenic assay to assess the viability and the resistance to oxidative stress of S. cerevisiae cells in the presence of Annurca apple extracts. The production of ROS and the aberrant morphology of nuclei were detected by cell staining with the fluorescent dies Dihydrorhodamine 123 and DAPI, respectively. Mitochondrial morphology was analyzed by following the localization of the mito-GFP protein into the mitochondrial matrix. RESULTS In this study, we show that apple extracts can increase yeast lifespan, reduce the levels of reactive oxygen species and cell sensitivity to oxidative stress, and prevent nuclei and mitochondria fragmentation protecting cells from regulated cell death. CONCLUSIONS In this paper, by using the yeast S. cerevisiae as a model, we have demonstrated that Annurca extracts possess antioxidant properties thanks to which the extracts can reduce the intracellular ROS levels and have anti-apoptotic functions thus prolonging cell lifespan. These results contribute to knowledge on the effects of natural compounds on ageing and support the use of yeast as a model organism for the development of simple tests to assess the effectiveness of bioactive substances from natural sources.
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148
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Synthesis, characterization, antimicrobial and biofilm inhibitory activities of new N-oxide esters. Med Chem Res 2017. [DOI: 10.1007/s00044-017-1885-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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149
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Synthesis of novel pyrazolo[3,4- b ]quinolinyl acetamide analogs, their evaluation for antimicrobial and anticancer activities, validation by molecular modeling and CoMFA analysis. Eur J Med Chem 2017; 130:223-239. [DOI: 10.1016/j.ejmech.2017.02.052] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Revised: 02/17/2017] [Accepted: 02/20/2017] [Indexed: 11/18/2022]
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150
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Nerol triggers mitochondrial dysfunction and disruption via elevation of Ca2+ and ROS in Candida albicans. Int J Biochem Cell Biol 2017; 85:114-122. [DOI: 10.1016/j.biocel.2017.02.006] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Revised: 02/10/2017] [Accepted: 02/11/2017] [Indexed: 01/20/2023]
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