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Qiu C, Arora P, Malik I, Laperuta AJ, Pavlovic EM, Ugochukwu S, Naik M, Kaplan CD. Thiolutin has complex effects in vivo but is a direct inhibitor of RNA polymerase II in vitro. Nucleic Acids Res 2024; 52:2546-2564. [PMID: 38214235 PMCID: PMC10954460 DOI: 10.1093/nar/gkad1258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 12/18/2023] [Accepted: 12/29/2023] [Indexed: 01/13/2024] Open
Abstract
Thiolutin is a natural product transcription inhibitor with an unresolved mode of action. Thiolutin and the related dithiolopyrrolone holomycin chelate Zn2+ and previous studies have concluded that RNA Polymerase II (Pol II) inhibition in vivo is indirect. Here, we present chemicogenetic and biochemical approaches to investigate thiolutin's mode of action in Saccharomyces cerevisiae. We identify mutants that alter sensitivity to thiolutin. We provide genetic evidence that thiolutin causes oxidation of thioredoxins in vivo and that thiolutin both induces oxidative stress and interacts functionally with multiple metals including Mn2+ and Cu2+, and not just Zn2+. Finally, we show direct inhibition of RNA polymerase II (Pol II) transcription initiation by thiolutin in vitro in support of classical studies that thiolutin can directly inhibit transcription in vitro. Inhibition requires both Mn2+ and appropriate reduction of thiolutin as excess DTT abrogates its effects. Pause prone, defective elongation can be observed in vitro if inhibition is bypassed. Thiolutin effects on Pol II occupancy in vivo are widespread but major effects are consistent with prior observations for Tor pathway inhibition and stress induction, suggesting that thiolutin use in vivo should be restricted to studies on its modes of action and not as an experimental tool.
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Affiliation(s)
- Chenxi Qiu
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX 77843, USA
| | - Payal Arora
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX 77843, USA
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Indranil Malik
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX 77843, USA
| | | | | | | | - Mandar Naik
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX 77843, USA
| | - Craig D Kaplan
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA 15260, USA
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2
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Xiong J, Wang L, Feng Z, Hang S, Yu J, Feng Y, Lu H, Jiang Y. Halofantrine Hydrochloride Acts as an Antioxidant Ability Inhibitor That Enhances Oxidative Stress Damage to Candida albicans. Antioxidants (Basel) 2024; 13:223. [PMID: 38397821 PMCID: PMC10886025 DOI: 10.3390/antiox13020223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 01/25/2024] [Accepted: 02/06/2024] [Indexed: 02/25/2024] Open
Abstract
Candida albicans, a prominent opportunistic pathogenic fungus in the human population, possesses the capacity to induce life-threatening invasive candidiasis in individuals with compromised immune systems despite the existence of antifungal medications. When faced with macrophages or neutrophils, C. albicans demonstrates its capability to endure oxidative stress through the utilization of antioxidant enzymes. Therefore, the enhancement of oxidative stress in innate immune cells against C. albicans presents a promising therapeutic approach for the treatment of invasive candidiasis. In this study, we conducted a comprehensive analysis of a library of drugs approved by the Food and Drug Administration (FDA). We discovered that halofantrine hydrochloride (HAL) can augment the antifungal properties of oxidative damage agents (plumbagin, menadione, and H2O2) by suppressing the response of C. albicans to reactive oxygen species (ROS). Furthermore, our investigation revealed that the inhibitory mechanism of HAL on the oxidative response is dependent on Cap1. In addition, the antifungal activity of HAL has been observed in the Galleria mellonella infection model. These findings provide evidence that targeting the oxidative stress response of C. albicans and augmenting the fungicidal capacity of oxidative damage agents hold promise as effective antifungal strategies.
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Affiliation(s)
| | | | | | | | | | | | - Hui Lu
- Department of Pharmacy, Shanghai Tenth People’s Hospital, School of Medicine, Tongji University, Shanghai 200072, China
| | - Yuanying Jiang
- Department of Pharmacy, Shanghai Tenth People’s Hospital, School of Medicine, Tongji University, Shanghai 200072, China
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3
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Rabiço F, Pedrino M, Narcizo JP, de Andrade AR, Reginatto V, Guazzaroni ME. Synthetic Biology Toolkit for a New Species of Pseudomonas Promissory for Electricity Generation in Microbial Fuel Cells. Microorganisms 2023; 11:2044. [PMID: 37630604 PMCID: PMC10458277 DOI: 10.3390/microorganisms11082044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 08/04/2023] [Accepted: 08/07/2023] [Indexed: 08/27/2023] Open
Abstract
Microbial fuel cells (MFCs) offer sustainable solutions for various biotechnological applications and are a crucial area of research in biotechnology. MFCs can effectively treat various refuse, such as wastewater and biodiesel waste by decomposing organic matter and generating electricity. Certain Pseudomonas species possess extracellular electron transfer (EET) pathways, enabling them to transfer electrons from organic compounds to the MFC's anode. Moreover, Pseudomonas species can grow under low-oxygen conditions, which is advantageous considering that the electron transfer process in an MFC typically leads to reduced oxygen levels at the anode. This study focuses on evaluating MFCs inoculated with a new Pseudomonas species grown with 1 g.L-1 glycerol, a common byproduct of biodiesel production. Pseudomonas sp. BJa5 exhibited a maximum power density of 39 mW.m-2. Also, the observed voltammograms and genome analysis indicate the potential production of novel redox mediators by BJa5. Additionally, we investigated the bacterium's potential as a synthetic biology non-model chassis. Through testing various genetic parts, including constitutive promoters, replication origins and cargos using pSEVA vectors as a scaffold, we assessed the bacterium's suitability. Overall, our findings offer valuable insights into utilizing Pseudomonas spp. BJa5 as a novel chassis for MFCs. Synthetic biology approaches can further enhance the performance of this bacterium in MFCs, providing avenues for improvement.
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Affiliation(s)
- Franciene Rabiço
- Department of Biology, Faculty of Philosophy, Sciences and Letters of Ribeirão Preto, University of São Paulo, Ribeirão Preto 14040-901, Brazil; (F.R.); (M.P.)
| | - Matheus Pedrino
- Department of Biology, Faculty of Philosophy, Sciences and Letters of Ribeirão Preto, University of São Paulo, Ribeirão Preto 14040-901, Brazil; (F.R.); (M.P.)
| | - Julia Pereira Narcizo
- Department of Chemistry, Faculty of Philosophy, Sciences and Letters of Ribeirão Preto, University of São Paulo, Ribeirão Preto 14049-900, Brazil; (J.P.N.); (A.R.d.A.); (V.R.)
| | - Adalgisa Rodrigues de Andrade
- Department of Chemistry, Faculty of Philosophy, Sciences and Letters of Ribeirão Preto, University of São Paulo, Ribeirão Preto 14049-900, Brazil; (J.P.N.); (A.R.d.A.); (V.R.)
| | - Valeria Reginatto
- Department of Chemistry, Faculty of Philosophy, Sciences and Letters of Ribeirão Preto, University of São Paulo, Ribeirão Preto 14049-900, Brazil; (J.P.N.); (A.R.d.A.); (V.R.)
| | - María-Eugenia Guazzaroni
- Department of Biology, Faculty of Philosophy, Sciences and Letters of Ribeirão Preto, University of São Paulo, Ribeirão Preto 14040-901, Brazil; (F.R.); (M.P.)
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4
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Studies on 1,4-Quinone Derivatives Exhibiting Anti-Leukemic Activity along with Anti-Colorectal and Anti-Breast Cancer Effects. Molecules 2022; 28:molecules28010077. [PMID: 36615273 PMCID: PMC9822417 DOI: 10.3390/molecules28010077] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Revised: 12/18/2022] [Accepted: 12/19/2022] [Indexed: 12/24/2022] Open
Abstract
Colorectal cancer (CRC), breast cancer, and chronic myeloid leukemia (CML) are life-threatening malignancies worldwide. Although potent therapeutic and screening strategies have been developed so far, these cancer types are still major public health problems. Therefore, the exploration of more potent and selective new agents is urgently required for the treatment of these cancers. Quinones represent one of the most important structures in anticancer drug discovery. We have previously identified a series of quinone-based compounds (ABQ-1-17) as anti-CML agents. In the current work, ABQ-3 was taken to the National Cancer Institute (NCI) for screening to determine its in vitro antiproliferative effects against a large panel of human tumor cell lines at five doses. ABQ-3 revealed significant growth inhibition against HCT-116 CRC and MCF-7 breast cancer cells with 2.00 µM and 2.35 µM GI50 values, respectively. The MTT test also showed that ABQ-3 possessed anticancer effects towards HCT-116 and MCF-7 cells with IC50 values of 5.22 ± 2.41 μM and 7.46 ± 2.76 μM, respectively. Further experiments indicated that ABQ-3 induced apoptosis in both cell lines, and molecular docking studies explicitly suggested that ABQ-3 exhibited DNA binding in a similar fashion to previously reported compounds. Based on in silico pharmacokinetic prediction, ABQ-3 might display drug-like features enabling this compound to become a lead molecule for future studies.
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5
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Prescott TAK, Anaissi-Afonso L, Fox KR, Maxwell A, Panaretou B, Machín F. A simplified and easy-to-use HIP HOP assay provides insights into chalcone antifungal mechanisms of action. FEBS Lett 2022; 596:3087-3102. [PMID: 36053795 PMCID: PMC10087691 DOI: 10.1002/1873-3468.14483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 07/07/2022] [Accepted: 07/12/2022] [Indexed: 12/14/2022]
Abstract
Elucidating the mechanism of action of an antifungal or cytotoxic compound is a time-consuming process. Yeast chemogenomic profiling provides a compelling solution to the problem but is experimentally complex. Here, we demonstrate the use of a highly simplified yeast chemical genetic assay comprising just 89 yeast deletion strains, each diagnostic for a specific mechanism of action. We use the assay to investigate the mechanism of action of two antifungal chalcone compounds, trans-chalcone and 4'-hydroxychalcone, and narrow down the mechanism to transcriptional stress. Crucially, the assay eliminates mechanisms of action such as topoisomerase I inhibition and membrane disruption that have been suggested for related chalcone compounds. We propose this simplified assay as a useful tool to rapidly identify common off-target mechanisms.
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Affiliation(s)
| | - Laura Anaissi-Afonso
- Unidad de Investigación, Hospital Universitario Ntra Sra de Candelaria, Santa Cruz de Tenerife, Spain.,Instituto de Tecnologías Biomédicas, Universidad de la Laguna, Tenerife, Spain
| | - Keith R Fox
- School of Biological Sciences, University of Southampton, UK
| | - Anthony Maxwell
- Department of Biochemistry and Metabolism, John Innes Centre, Norwich, UK
| | - Barry Panaretou
- School of Cancer and Pharmaceutical Sciences, King's College London, UK
| | - Félix Machín
- Unidad de Investigación, Hospital Universitario Ntra Sra de Candelaria, Santa Cruz de Tenerife, Spain.,Instituto de Tecnologías Biomédicas, Universidad de la Laguna, Tenerife, Spain.,Facultad de Ciencias de la Salud, Universidad Fernando Pessoa Canarias, Las Palmas de Gran Canaria, Spain
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6
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Gemünde A, Lai B, Pause L, Krömer J, Holtmann D. Redox mediators in microbial electrochemical systems. ChemElectroChem 2022. [DOI: 10.1002/celc.202200216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- André Gemünde
- Technische Hochschule Mittelhessen Institute of Bioprocess Engineering and Pharmaceutical Technology Wiesenstraße 14 35390 Gießen GERMANY
| | - Bin Lai
- Helmholtz Centre for Environmental Research UFZ Department of Environmental Microbiology: Helmholtz-Zentrum fur Umweltforschung UFZ Abteilung Umweltmikrobiologie Systems Biotechnology 04318 Leipzig GERMANY
| | - Laura Pause
- Helmholtz Centre for Environmental Research UFZ Environmental Engineering and Biotechnology Research Unit: Helmholtz-Zentrum fur Umweltforschung UFZ Themenbereich Umwelt- und Biotechnologie Systems Biotechnology 04318 Leipzig GERMANY
| | - Jens Krömer
- Helmholtz Centre for Environmental Research UFZ Environmental Engineering and Biotechnology Research Unit: Helmholtz-Zentrum fur Umweltforschung UFZ Themenbereich Umwelt- und Biotechnologie Systems Biotechnology 04318 Leipzig GERMANY
| | - Dirk Holtmann
- Technische Hochschule Mittelhessen IBPT Wiesenstrasse 14 35390 Giessen GERMANY
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7
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Ribeiro HF, de Castro Sant' Anna C, de Jesus Oliveira Kato V, de Sousa Brasil RM, Bona AB, da Costa DF, Lima IK, Soares PC, Guimarães APA, de Assumpção PP, Burbano RR. CDC25B Inhibition by menadione: a potential new therapeutical approach. Anticancer Agents Med Chem 2022; 22:2927-2932. [PMID: 35440317 DOI: 10.2174/1871520622666220418131935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Revised: 01/28/2022] [Accepted: 02/24/2022] [Indexed: 12/24/2022]
Abstract
Gastric cancer (GC) is the fifth most common type of tumor and the third leading cause of cancer death worldwide. The evolution of gastric carcinogenesis is still poorly understood and, for this reason, preclinical research protocols were established that included the development of gastric cancer cell lines and the establishment of models of gastric carcinogenesis in non-human primate Sapajus apella. A comprehensive literature search was performed in relevant databases such as PubMed, ResearchGate and Google Scholar to identify studies related to the topic. After an in-depth study of these reports, significant data/data were collected and compiled under appropriate headings. The main result of the studies carried out by the group on GC is the demonstration of the MYC gene overexpression as a common phenomenon in stomach carcinogenesis. Furthermore, we revealed that reducing the expression of the CDC25B gene, regulated by the MYC protein, is a therapeutic strategy against stomach tumors. This review article reveals preclinical evidence that treatment with menadione in experimental models of gastric tumorigenesis, in vivo and in vitro, inhibits the action of the phosphatase CDC25B and, consequently, prevents cell proliferation, invasion and migration.
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8
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de Souza AS, Ribeiro RCB, Costa DCS, Pauli FP, Pinho DR, de Moraes MG, da Silva FDC, Forezi LDSM, Ferreira VF. Menadione: a platform and a target to valuable compounds synthesis. Beilstein J Org Chem 2022; 18:381-419. [PMID: 35529893 PMCID: PMC9039524 DOI: 10.3762/bjoc.18.43] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Accepted: 03/30/2022] [Indexed: 01/26/2023] Open
Abstract
Naphthoquinones are important natural or synthetic compounds belonging to the general class of quinones. Many compounds in this class have become drugs that are on the pharmaceutical market for the treatment of various diseases. A special naphthoquinone derivative is menadione, a synthetic naphthoquinone belonging to the vitamin K group. This compound can be synthesized by different methods and it has a broad range of biological and synthetic applications, which will be highlighted in this review.
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Affiliation(s)
- Acácio S de Souza
- Universidade Federal Fluminense, Departamento de Tecnologia Farmacêutica, Faculdade de Farmácia, R. Dr. Mario Vianna, 523, Santa Rosa, CEP 24241-002, Niterói-RJ, Brazil
| | - Ruan Carlos B Ribeiro
- Universidade Federal Fluminense, Departamento de Tecnologia Farmacêutica, Faculdade de Farmácia, R. Dr. Mario Vianna, 523, Santa Rosa, CEP 24241-002, Niterói-RJ, Brazil
| | - Dora C S Costa
- Department of Chemistry, CICECO – Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal
| | - Fernanda P Pauli
- Universidade Federal Fluminense, Instituto de Química, Departamento de Química Orgânica, 24020-150 Niterói, RJ, Brazil
| | - David R Pinho
- Universidade Federal Fluminense, Instituto de Química, Departamento de Química Orgânica, 24020-150 Niterói, RJ, Brazil
| | - Matheus G de Moraes
- Universidade Federal Fluminense, Instituto de Química, Departamento de Química Orgânica, 24020-150 Niterói, RJ, Brazil
| | - Fernando de C da Silva
- Universidade Federal Fluminense, Instituto de Química, Departamento de Química Orgânica, 24020-150 Niterói, RJ, Brazil
| | - Luana da S M Forezi
- Universidade Federal Fluminense, Instituto de Química, Departamento de Química Orgânica, 24020-150 Niterói, RJ, Brazil
| | - Vitor F Ferreira
- Universidade Federal Fluminense, Departamento de Tecnologia Farmacêutica, Faculdade de Farmácia, R. Dr. Mario Vianna, 523, Santa Rosa, CEP 24241-002, Niterói-RJ, Brazil
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9
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A Fast-Growing Oleaginous Strain of Coelastrella Capable of Astaxanthin and Canthaxanthin Accumulation in Phototrophy and Heterotrophy. Life (Basel) 2022; 12:life12030334. [PMID: 35330084 PMCID: PMC8955800 DOI: 10.3390/life12030334] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Revised: 02/08/2022] [Accepted: 02/21/2022] [Indexed: 12/23/2022] Open
Abstract
Considering the importance of microalgae as a promising feedstock for the production of both low- and high-value products, such as lipids and pigments, it is desirable to isolate strains which simultaneously accumulate these two types of products and grow in various conditions in order to widen their biotechnological applicability. A novel freshwater strain from the genus Coelastrella was isolated in Belgium. Compared to other Coelastrella species, the isolate presented rapid growth in phototrophy, dividing 3.5 times per day at a light intensity of 400 µmol·m−2·s−1 and 5% CO2. In addition, nitrogen depletion was associated with the accumulation of astaxanthin, canthaxanthin, and fatty acids, which reached ~30% of dry weight, and a majority of SFAs and MUFAs, which are good precursors for biodiesel. This strain also accumulated astaxanthin and canthaxanthin in heterotrophy. Although the content was very low in this latter condition, it is an interesting feature considering the biotechnological potential of the microalgal heterotrophic growth. Thus, due to its rapid growth in the light, its carotenogenesis, and its fatty acids characteristics, the newly identified Coelastrella strain could be considered as a potential candidate for biorefinery purposes of both low- and high-values products.
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10
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Pena AP, Almeida RG, Campos JL, Dos Santos HF, da Silva Júnior EN, Jorio A. Raman spectra-based structural classification analysis of quinoidal and derived molecular systems. Phys Chem Chem Phys 2022; 24:1183-1190. [PMID: 34931633 DOI: 10.1039/d1cp04261k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
This work reports a classification analysis method based on the vibrational Raman spectra of 38 quinones and related structures, spectrally ordering and classifying the compounds. The molecular systems are relevant for chemical and biological processes, with applications in pharmacology, toxicology and medicine. The classification strategy uses a combination of principal component analysis with K-means clustering methods. Both theoretical simulations and experimental data are analysed, thus establishing their spectral characteristics, as related to their chemical structures and properties. The protocol introduced here should be broadly applicable in other molecular and solid state systems.
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Affiliation(s)
- Arthur P Pena
- Departamento de Física, ICEX, UFMG, Belo Horizonte, MG, 31270-901, Brazil.
| | - Renata G Almeida
- Departamento de Química, ICEX, UFMG, Belo Horizonte, MG, 31270-901, Brazil
| | - João Luiz Campos
- Departamento de Física, ICEX, UFMG, Belo Horizonte, MG, 31270-901, Brazil.
| | | | | | - Ado Jorio
- Departamento de Física, ICEX, UFMG, Belo Horizonte, MG, 31270-901, Brazil.
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11
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Nitroreductase Increases Menadione-Mediated Oxidative Stress in Aspergillus nidulans. Appl Environ Microbiol 2021; 87:e0175821. [PMID: 34613761 DOI: 10.1128/aem.01758-21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Nitroreductases (NTRs) catalyze the reduction of a wide range of nitro-compounds and quinones using NAD(P)H. Although the physiological functions of these enzymes remain obscure, a tentative function of resistance to reactive oxygen species (ROS) via the detoxification of menadione has been proposed. This suggestion is based primarily on the transcriptional or translational induction of an NTR response to menadione rather than on convincing experimental evidence. We investigated the performance of a fungal NTR from Aspergillus nidulans (AnNTR) exposed to menadione to address the question of whether NTR is really an ROS defense enzyme. We confirmed that AnNTR was transcriptionally induced by external menadione. We observed that menadione treatment generated cytotoxic levels of O2•-, which requires well-known antioxidant enzymes such as superoxide dismutase, catalase, and peroxiredoxin to protect A. nidulans against menadione-derived ROS stress. However, AnNTR was counterproductive for ROS defense, since knocking out AnNTR decreased the intracellular O2•- levels, resulting in fungal viability higher than that of the wild type. This observation implies that AnNTR may accelerate the generation of O2•- from menadione. Our in vitro experiments indicated that AnNTR uses NADPH to reduce menadione in a single-electron reaction, and the subsequent semiquinone-quinone redox cycling resulted in O2•- generation. We demonstrated that A. nidulans nitroreductase should be an ROS generator, but not an ROS scavenger, in the presence of menadione. Our results clarified the relationship between nitroreductase and menadione-derived ROS stress, which has long been ambiguous. IMPORTANCE Menadione is commonly used as an O2•- generator in studies of oxidative stress responses. However, the precise mechanism through which menadione mediates cellular O2•- generation, as well as the way in which cells respond, remains unclear. Elucidating these events will have important implications for the use of menadione in biological and medical studies. Our results show that the production of Aspergillus nidulans nitroreductase (AnNTR) was induced by menadione. However, the accumulated AnNTR did not protect cells but instead increased the cytotoxic effect of menadione through a single-electron reduction reaction. Our finding that nitroreductase is involved in the menadione-mediated O2•- generation pathway has clarified the relationship between nitroreductase and menadione-derived ROS stress, which has long been ambiguous.
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12
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Torán-Vilarrubias A, Moriel-Carretero M. Oxidative agents elicit endoplasmic reticulum morphological changes suggestive of alterations in lipid metabolism. MICROPUBLICATION BIOLOGY 2021; 2021. [PMID: 34557658 PMCID: PMC8453305 DOI: 10.17912/micropub.biology.000462] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 09/03/2021] [Accepted: 09/10/2021] [Indexed: 11/06/2022]
Abstract
The endoplasmic reticulum (ER) is a central organelle in charge of correct protein folding; lipids synthesis, modification, and sorting; as well as of maintenance of calcium homeostasis. To accomplish these functions, the ER lumen possesses an oxidative potential. Challenging cells with reductive agents therefore provokes an ER stress that immediately affects protein folding, and which morphologically manifests by an expansion of the cytoplasmic ER network. Yet less is known about the impact on the ER of exposing cells to oxidative agents, which risk to exacerbate the basal, physiologically oxidative environment. We have monitored the morphology of the ER of Saccharomyces cerevisiae in response to this type of treatment. We bring the notion that oxidative agents give rise to diverse alterations in the perinuclear ER subdomain that are suggestive of lipid metabolism perturbations.
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Affiliation(s)
- Alba Torán-Vilarrubias
- Institut de Génétique Humaine (IGH), Université de Montpellier, Centre National de la Recherche Scientifique, 34396 Montpellier CEDEX 05, France
| | - María Moriel-Carretero
- Centre de Recherche en Biologie cellulaire de Montpellier (CRBM), Université de Montpellier, Centre National de la Recherche Scientifique, 34293 Montpellier CEDEX 05, France
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13
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Fraser BA, Miller K, Trigg NA, Smith ND, Western PS, Nixon B, Aitken RJ. A novel approach to nonsurgical sterilization; application of menadione-modified gonocyte-targeting M13 bacteriophage for germ cell ablation in utero. Pharmacol Res Perspect 2021; 8:e00654. [PMID: 32930516 PMCID: PMC7507010 DOI: 10.1002/prp2.654] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Accepted: 08/17/2020] [Indexed: 12/13/2022] Open
Abstract
There remains a compelling need for the development of nonsurgical sterilizing agents to expand the fertility management options for both domestic and feral animal species. We hypothesize that an efficacious sterilization approach would be to selectively ablate nonrenewable cell types that are essential for reproduction, such as the undifferentiated gonocytes within the embryonic gonad. Here, we report a novel strategy to achieve this goal centered on the use of a chemically modified M13 bacteriophage to effect the targeted delivery of menadione, a redox‐cycling naphthoquinone, to mouse gonocytes. Panning of the M13 random peptide ‘phage display library proved effective in the isolation of gonocyte‐specific targeting clones. One such clone was modified via N‐succinimidyl‐S‐acetylthioacetate (SATA) linkage to the N‐terminus of the major PVIII capsid protein. Subsequent deacetylation of the SATA was undertaken to expose a thiol group capable of reacting with menadione through Michael addition. This chemical modification was confirmed using UV spectrophotometry. In proof‐of‐concept experiments we applied the modified ‘phage to primary cultures of fetal germ cells and induced, an approximately, 60% reduction in the viability of the target cell population. These studies pave the way for in vivo application of chemically modified M13 bacteriophage in order to achieve the selective ablation of nonrenewable cell types in the reproductive system, thereby providing a novel nonsurgical approach the regulation of fertility in target species.
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Affiliation(s)
- Barbara A Fraser
- Priority Research Centre for Reproductive Science, The University of Newcastle, Callaghan, NSW, Australia.,Pregnancy and Reproduction Program, Hunter Medical Research Institute, New Lambton Heights, NSW, Australia
| | - Kasey Miller
- Priority Research Centre for Reproductive Science, The University of Newcastle, Callaghan, NSW, Australia.,Pregnancy and Reproduction Program, Hunter Medical Research Institute, New Lambton Heights, NSW, Australia
| | - Natalie A Trigg
- Priority Research Centre for Reproductive Science, The University of Newcastle, Callaghan, NSW, Australia.,Pregnancy and Reproduction Program, Hunter Medical Research Institute, New Lambton Heights, NSW, Australia
| | - Nathan D Smith
- Analytical and Biomolecular Research Facility, The University of Newcastle, Callaghan, NSW, Australia
| | - Patrick S Western
- Centre for Reproductive Health, Hudson Institute of Medical Research, Clayton, Victoria, Australia.,Department of Molecular and Translational Science, Monash University, Clayton, Victoria, Australia
| | - Brett Nixon
- Priority Research Centre for Reproductive Science, The University of Newcastle, Callaghan, NSW, Australia.,Pregnancy and Reproduction Program, Hunter Medical Research Institute, New Lambton Heights, NSW, Australia
| | - Robert J Aitken
- Priority Research Centre for Reproductive Science, The University of Newcastle, Callaghan, NSW, Australia.,Pregnancy and Reproduction Program, Hunter Medical Research Institute, New Lambton Heights, NSW, Australia.,Faculty of Health and Medicine, The University of Newcastle, Callaghan, NSW, Australia
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14
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da Luz BSR, Seyffert N, Profeta R, Rodrigues LG, Brenig B, Gala-Garcia A, Diniz AB, Meyer R, Pacheco LGDC, Menezes GB, Azevedo V, Castro TLDP. Promoter activity of sigma factor coding genes of Corynebacterium pseudotuberculosis in response to abiotic stresses. GENE REPORTS 2021. [DOI: 10.1016/j.genrep.2021.101091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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15
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Funk MI, Conde MA, Piwien-Pilipuk G, Uranga RM. Novel antiadipogenic effect of menadione in 3T3-L1 cells. Chem Biol Interact 2021; 343:109491. [PMID: 33945810 DOI: 10.1016/j.cbi.2021.109491] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 03/31/2021] [Accepted: 04/19/2021] [Indexed: 12/30/2022]
Abstract
Inhibition of adipocyte differentiation can be used as a strategy for preventing adipose tissue expansion and, consequently, for obesity management. Since reactive oxygen species (ROS) have emerged as key modulators of adipogenesis, the effect of menadione (a synthetic form of vitamin K known to induce the increase of intracellular ROS) on 3T3-L1 preadipocyte differentiation was studied. Menadione (15 μM) increased ROS and lipid peroxidation, generating mild oxidative stress without affecting cell viability. Menadione drastically inhibited adipogenesis, accompanied by decreased intracellular lipid accumulation and diminished expression of the lipo/adipogenic markers peroxisome proliferator-activated receptor (PPAR)γ, fatty acid synthase (FAS), CCAAT/enhancer-binding protein (C/EBP) α, fatty acid binding protein (FABP) 4, and perilipin. Menadione treatment also increased lipolysis, as indicated by augmented glycerol release and reinforced by the increased expression of hormone-sensitive lipase (HSL). Additionally, menadione increased the inhibitory phosphorylation of acetyl-CoA-carboxylase (ACC), which results in the inhibition of fatty acid synthesis. As a consequence, triglyceride content was decreased. Menadione also inhibited the phosphatidylinositol 3-kinase (PI3K)/Akt pathway. Further, treatment with increased concentration of insulin, a potent physiological activator of the PI3K/Akt pathway, rescued the normal level of expression of PPARγ, the master regulator of adipogenesis, and overcame the restraining effect of menadione on the differentiation capacity of 3T3-L1 preadipocytes. Our study reveals novel antiadipogenic action for menadione, which is, at least in part, mediated by the PI3K/Akt pathway signaling and raises its potential as a therapeutic agent in the treatment or prevention of adiposity.
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Affiliation(s)
- Melania Iara Funk
- Instituto de Investigaciones Bioquímicas de Bahía Blanca, Universidad Nacional Del Sur (UNS)-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Bahía Blanca, Argentina. Departamento de Biología, Bioquímica y Farmacia, UNS, Bahía Blanca, Argentina
| | - Melisa Ailén Conde
- Instituto de Investigaciones Bioquímicas de Bahía Blanca, Universidad Nacional Del Sur (UNS)-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Bahía Blanca, Argentina. Departamento de Biología, Bioquímica y Farmacia, UNS, Bahía Blanca, Argentina
| | | | - Romina María Uranga
- Instituto de Investigaciones Bioquímicas de Bahía Blanca, Universidad Nacional Del Sur (UNS)-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Bahía Blanca, Argentina. Departamento de Biología, Bioquímica y Farmacia, UNS, Bahía Blanca, Argentina.
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16
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Elsadek LA, Matthews JH, Nishimura S, Nakatani T, Ito A, Gu T, Luo D, Salvador-Reyes LA, Paul VJ, Kakeya H, Luesch H. Genomic and Targeted Approaches Unveil the Cell Membrane as a Major Target of the Antifungal Cytotoxin Amantelide A. Chembiochem 2021; 22:1790-1799. [PMID: 33527693 DOI: 10.1002/cbic.202000685] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2020] [Revised: 01/31/2021] [Indexed: 12/13/2022]
Abstract
Amantelide A, a polyhydroxylated macrolide isolated from a marine cyanobacterium, displays broad-spectrum activity against mammalian cells, bacterial pathogens, and marine fungi. We conducted comprehensive mechanistic studies to identify the molecular targets and pathways affected by amantelide A. Our investigations relied on chemical structure similarities with compounds of known mechanisms, yeast knockout mutants, yeast chemogenomic profiling, and direct biochemical and biophysical methods. We established that amantelide A exerts its antifungal action by binding to ergosterol-containing membranes followed by pore formation and cell death, a mechanism partially shared with polyene antifungals. Binding assays demonstrated that amantelide A also binds to membranes containing epicholesterol or mammalian cholesterol, thus suggesting that the cytotoxicity to mammalian cells might be due to its affinity to cholesterol-containing membranes. However, membrane interactions were not completely dependent on sterols. Yeast chemogenomic profiling suggested additional direct or indirect effects on actin. Accordingly, we performed actin polymerization assays, which suggested that amantelide A also promotes actin polymerization in cell-free systems. However, the C-33 acetoxy derivative amantelide B showed a similar effect on actin dynamics in vitro but no significant activity against yeast. Overall, these studies suggest that the membrane effects are the most functionally relevant for amantelide A mechanism of action.
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Affiliation(s)
- Lobna A Elsadek
- Department of Medicinal Chemistry, University of Florida, 1345 Center Drive, Gainesville, FL 32610, USA.,Center for Natural Products,Drug Discovery and Development (CNPD3), University of Florida, 1345 Center Drive, Gainesville, FL 32610, USA
| | - James H Matthews
- Department of Medicinal Chemistry, University of Florida, 1345 Center Drive, Gainesville, FL 32610, USA.,Center for Natural Products,Drug Discovery and Development (CNPD3), University of Florida, 1345 Center Drive, Gainesville, FL 32610, USA
| | - Shinichi Nishimura
- Department of System Chemotherapy and Molecular Sciences, Division of Bioinformatics and Chemical Genomics, Graduate School of Pharmaceutical Sciences, Kyoto University Sakyo-ku, Kyoto, 606-8501, Japan.,Department of Biotechnology, Graduate School of Agricultural and Life Sciences, University of Tokyo, Bunkyo-ku, Tokyo, 113-8657, Japan.,Collaborative Research Institute for Innovative Microbiology, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-8657, Japan
| | - Takahiro Nakatani
- Department of System Chemotherapy and Molecular Sciences, Division of Bioinformatics and Chemical Genomics, Graduate School of Pharmaceutical Sciences, Kyoto University Sakyo-ku, Kyoto, 606-8501, Japan
| | - Airi Ito
- Department of System Chemotherapy and Molecular Sciences, Division of Bioinformatics and Chemical Genomics, Graduate School of Pharmaceutical Sciences, Kyoto University Sakyo-ku, Kyoto, 606-8501, Japan
| | - Tongjun Gu
- Interdisciplinary Center for Biotechnology Research, University of Florida, 2033 Mowry Road, Gainesville, FL 32610, USA
| | - Danmeng Luo
- Department of Medicinal Chemistry, University of Florida, 1345 Center Drive, Gainesville, FL 32610, USA.,Center for Natural Products,Drug Discovery and Development (CNPD3), University of Florida, 1345 Center Drive, Gainesville, FL 32610, USA
| | - Lilibeth A Salvador-Reyes
- Department of Medicinal Chemistry, University of Florida, 1345 Center Drive, Gainesville, FL 32610, USA.,Marine Science Institute, College of Science, University of the Philippines Diliman, Quezon City, 1100, Philippines
| | - Valerie J Paul
- Smithsonian Marine Station, 701 Seaway Drive, Ft., Pierce, FL 34949, USA
| | - Hideaki Kakeya
- Department of System Chemotherapy and Molecular Sciences, Division of Bioinformatics and Chemical Genomics, Graduate School of Pharmaceutical Sciences, Kyoto University Sakyo-ku, Kyoto, 606-8501, Japan
| | - Hendrik Luesch
- Department of Medicinal Chemistry, University of Florida, 1345 Center Drive, Gainesville, FL 32610, USA.,Center for Natural Products,Drug Discovery and Development (CNPD3), University of Florida, 1345 Center Drive, Gainesville, FL 32610, USA
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17
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Jayakody LN, Jin YS. In-depth understanding of molecular mechanisms of aldehyde toxicity to engineer robust Saccharomyces cerevisiae. Appl Microbiol Biotechnol 2021; 105:2675-2692. [PMID: 33743026 DOI: 10.1007/s00253-021-11213-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 02/17/2021] [Accepted: 02/28/2021] [Indexed: 11/25/2022]
Abstract
Aldehydes are ubiquitous electrophilic compounds that ferment microorganisms including Saccharomyces cerevisiae encounter during the fermentation processes to produce food, fuels, chemicals, and pharmaceuticals. Aldehydes pose severe toxicity to the growth and metabolism of the S. cerevisiae through a variety of toxic molecular mechanisms, predominantly via damaging macromolecules and hampering the production of targeted compounds. Compounds with aldehyde functional groups are far more toxic to S. cerevisiae than all other functional classes, and toxic potency depends on physicochemical characteristics of aldehydes. The yeast synthetic biology community established a design-build-test-learn framework to develop S. cerevisiae cell factories to valorize the sustainable and renewable biomass, including the lignin-derived substrates. However, thermochemically pretreated biomass-derived substrate streams contain diverse aldehydes (e.g., glycolaldehyde and furfural), and biological conversions routes of lignocellulosic compounds consist of toxic aldehyde intermediates (e.g., formaldehyde and methylglyoxal), and some of the high-value targeted products have aldehyde functional group (e.g., vanillin and benzaldehyde). Numerous studies comprehensively characterized both single and additive effects of aldehyde toxicity via systems biology investigations, and novel molecular approaches have been discovered to overcome the aldehyde toxicity. Based on those novel approaches, researchers successfully developed synthetic yeast cell factories to convert lignocellulosic substrates to valuable products, including aldehyde compounds. In this mini-review, we highlight the salient relationship of physicochemical characteristics and molecular toxicity of aldehydes, the molecular detoxification and macromolecules protection mechanisms of aldehydes, and the advances of engineering robust S. cerevisiae against complex mixtures of aldehyde inhibitors. KEY POINTS: • We reviewed structure-activity relationships of aldehyde toxicity on S. cerevisiae. • Two-tier protection mechanisms to alleviate aldehyde toxicity are presented. • We highlighted the strategies to overcome the synergistic toxicity of aldehydes.
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Affiliation(s)
- Lahiru N Jayakody
- School of Biological Sciences, Southern Illinois University Carbondale, Carbondale, IL, USA.
- Fermentation Science Institute, Southern Illinois University Carbondale, Carbondale, IL, USA.
| | - Yong-Su Jin
- Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, IL, USA
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
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18
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Magnetic Solid-Phase Extraction of Lawsone Using Polyphenol-Coated Magnetic Nanoparticles: Synthesis, Characterization and examination. Chromatographia 2021. [DOI: 10.1007/s10337-021-04019-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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19
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Baker's Yeast-Based Microbial Fuel Cell Mediated by 2-Methyl-1,4-Naphthoquinone. MEMBRANES 2021; 11:membranes11030182. [PMID: 33800926 PMCID: PMC8001437 DOI: 10.3390/membranes11030182] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 02/26/2021] [Accepted: 03/02/2021] [Indexed: 11/16/2022]
Abstract
Microbial fuel cell (MFC) efficiency depends on charge transfer capability from microbe to anode, and the application of suitable redox mediators is important in this area. In this study, yeast viability experiments were performed to determine the 2-methyl-1,4-naphthoquinone (menadione (MD)) influence on different yeast cell species (baker's yeast and Saccharomyces cerevisiae yeast cells). In addition, electrochemical measurements to investigate MFC performance and efficiency were carried out. This research revealed that baker's yeast cells were more resistant to dissolved MD, but the current density decreased when yeast solution concentration was incrementally increased in the same cell. The maximal calculated power of a designed baker's yeast-based MFC cell anode was 0.408 mW/m2 and this power output was registered at 24 mV. Simultaneously, the cell generated a 62-mV open circuit potential in the presence of 23 mM potassium ferricyanide and the absence of glucose and immobilized MD. The results only confirm that MD has strong potential to be applied to microbial fuel cells and that a two-redox-mediator-based system is suitable for application in microbial fuel cells.
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20
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Raj A, Nachiappan V. Hydroquinone exposure accumulates neutral lipid by the activation of CDP-DAG pathway in Saccharomyces cerevisiae. Toxicol Res (Camb) 2021; 10:354-367. [PMID: 33884185 DOI: 10.1093/toxres/tfab005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 01/09/2021] [Accepted: 01/17/2021] [Indexed: 11/13/2022] Open
Abstract
Benzene metabolites (HQ and BQ) are toxic compounds and their presence in human cause alteration in cellular respiration and kidney damage. In the current study, Saccharomyces cerevisiae has been used as a model organism and acute exposure of hydroquinone (HQ) decreased cell growth and increased reactive oxygen species (ROS). The expression of apoptosis regulatory genes (YCA1, NUC1, YSP1 and AIF1) were increased with HQ exposure in the wild-type cells. HQ exposure in the wild-type cells altered both the phospholipid and neutral lipid levels. Phosphatidylcholine is a vital membrane lipid that has a vital role in membrane biogenesis and was increased significantly with HQ. The neutral lipid results were supported with lipid droplets data and mRNA expression study. The phospholipid knockouts (Kennedy pathway) accumulated neutral lipids via the CDP-DAG (cytidine-diphosphate-diacylglycerol) pathway genes both in the presence and absence of HQ.
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Affiliation(s)
- Abhishek Raj
- Biomembrane Lab, Department of Biochemistry, School of Life Sciences, Bharathidasan University, Tiruchirappalli 620024, Tamil Nadu, India
| | - Vasanthi Nachiappan
- Biomembrane Lab, Department of Biochemistry, School of Life Sciences, Bharathidasan University, Tiruchirappalli 620024, Tamil Nadu, India
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21
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Smethurst DGJ, Kovalev N, McKenzie ER, Pestov DG, Shcherbik N. Iron-mediated degradation of ribosomes under oxidative stress is attenuated by manganese. J Biol Chem 2020; 295:17200-17214. [PMID: 33040024 PMCID: PMC7863898 DOI: 10.1074/jbc.ra120.015025] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Revised: 10/05/2020] [Indexed: 02/05/2023] Open
Abstract
Protein biosynthesis is fundamental to cellular life and requires the efficient functioning of the translational machinery. At the center of this machinery is the ribosome, a ribonucleoprotein complex that depends heavily on Mg2+ for structure. Recent work has indicated that other metal cations can substitute for Mg2+, raising questions about the role different metals may play in the maintenance of the ribosome under oxidative stress conditions. Here, we assess ribosomal integrity following oxidative stress both in vitro and in cells to elucidate details of the interactions between Fe2+ and the ribosome and identify Mn2+ as a factor capable of attenuating oxidant-induced Fe2+-mediated degradation of rRNA. We report that Fe2+ promotes degradation of all rRNA species of the yeast ribosome and that it is bound directly to RNA molecules. Furthermore, we demonstrate that Mn2+ competes with Fe2+ for rRNA-binding sites and that protection of ribosomes from Fe2+-mediated rRNA hydrolysis correlates with the restoration of cell viability. Our data, therefore, suggest a relationship between these two transition metals in controlling ribosome stability under oxidative stress.
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Affiliation(s)
- Daniel G J Smethurst
- Department of Cell Biology and Neuroscience, Rowan University, School of Osteopathic Medicine, Stratford, New Jersey, USA
| | - Nikolay Kovalev
- Department of Cell Biology and Neuroscience, Rowan University, School of Osteopathic Medicine, Stratford, New Jersey, USA
| | - Erica R McKenzie
- Civil and Environmental Engineering Department, Temple University, Philadelphia, Pennsylvania, USA
| | - Dimitri G Pestov
- Department of Cell Biology and Neuroscience, Rowan University, School of Osteopathic Medicine, Stratford, New Jersey, USA
| | - Natalia Shcherbik
- Department of Cell Biology and Neuroscience, Rowan University, School of Osteopathic Medicine, Stratford, New Jersey, USA.
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22
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Bayrak N, Yıldırım H, Yıldız M, Radwan MO, Otsuka M, Fujita M, Ciftci HI, Tuyun AF. A novel series of chlorinated plastoquinone analogs: Design, synthesis, and evaluation of anticancer activity. Chem Biol Drug Des 2020; 95:343-354. [DOI: 10.1111/cbdd.13651] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 11/05/2019] [Accepted: 11/10/2019] [Indexed: 12/17/2022]
Affiliation(s)
- Nilüfer Bayrak
- Chemistry Department Engineering Faculty Istanbul University‐Cerrahpasa Istanbul Turkey
| | - Hatice Yıldırım
- Chemistry Department Engineering Faculty Istanbul University‐Cerrahpasa Istanbul Turkey
| | - Mahmut Yıldız
- Chemistry Department Gebze Technical University Kocaeli Turkey
| | - Mohamed O. Radwan
- Department of Drug Discovery Science Farm Ltd. Kumamoto Japan
- Medicinal and Biological Chemistry Science Farm Joint Research Laboratory Faculty of Life Sciences Kumamoto University Kumamoto Japan
- Chemistry of Natural Compounds Department Pharmaceutical and Drug Industries Research Division National Research Centre Cairo Egypt
| | - Masami Otsuka
- Department of Drug Discovery Science Farm Ltd. Kumamoto Japan
- Medicinal and Biological Chemistry Science Farm Joint Research Laboratory Faculty of Life Sciences Kumamoto University Kumamoto Japan
| | - Mikako Fujita
- Medicinal and Biological Chemistry Science Farm Joint Research Laboratory Faculty of Life Sciences Kumamoto University Kumamoto Japan
| | - Halil I. Ciftci
- Department of Drug Discovery Science Farm Ltd. Kumamoto Japan
- Medicinal and Biological Chemistry Science Farm Joint Research Laboratory Faculty of Life Sciences Kumamoto University Kumamoto Japan
| | - Amaç Fatih Tuyun
- Department of Chemistry Faculty of Science Istanbul University Istanbul Turkey
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23
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Characterization of the activity, aggregation, and toxicity of heterodimers of WT and ALS-associated mutant Sod1. Proc Natl Acad Sci U S A 2019; 116:25991-26000. [PMID: 31796595 PMCID: PMC6926019 DOI: 10.1073/pnas.1902483116] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Aggregation of the antioxidant enzyme Sod1 represents common factors of both familial (fALS) and sporadic cases of ALS, a fatal neurodegenerative disease. Although many ALS studies have focused on Sod1 homodimers/homomers, the investigation of Sod1 heterodimers/heteromers remains controversial and has mostly been performed with recombinant proteins in vitro, in the absence of a cellular environment. By using living cells, this study sheds light into a critical issue in the context of fALS, the high toxicity of the WT–mutant heteromeric inclusions, especially WT–A4V heteromers which accumulate both in human cells as well as in chronologically aged yeast cells. Besides the aggregation, we proposed that an inefficient heteromer response against oxidative conditions might contribute to fALS-linked mutant hSod1 toxicity. Mutations in Cu/Zn superoxide dismutase (Sod1) have been reported in both familial and sporadic amyotrophic lateral sclerosis (ALS). In this study, we investigated the behavior of heteromeric combinations of wild-type (WT) and mutant Sod1 proteins A4V, L38V, G93A, and G93C in human cells. We showed that both WT and mutant Sod1 formed dimers and oligomers, but only mutant Sod1 accumulated in intracellular inclusions. Coexpression of WT and hSod1 mutants resulted in the formation of a larger number of intracellular inclusions per cell than that observed in cells coexpressing WT or mutant hSod1. The number of inclusions was greater in cells expressing A4V hSod1. To eliminate the contribution of endogenous Sod1, and better evaluate the effect of ALS-associated mutant Sod1 expression, we expressed human Sod1 WT and mutants in human cells knocked down for endogenous Sod1 (Sod1-KD), and in sod1Δ yeast cells. Using Sod1-KD cells we found that the WT–A4V heteromers formed higher molecular weight species compared with A4V and WT homomers. Using the yeast model, in conditions of chronological aging, we concluded that cells expressing Sod1 heterodimers showed decreased antioxidant activity, increased oxidative damage, reduced longevity, and oxidative stress-induced mutant Sod1 aggregation. In addition, we also found that ALS-associated Sod1 mutations reduced nuclear localization and, consequently, impaired the antioxidant response, suggesting this change in localization may contribute to disease in familial ALS. Overall, our study provides insight into the molecular underpinnings of ALS and may open avenues for the design of future therapeutic strategies.
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24
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Calegari GC, Queiroz Santos VA, Barbosa-Dekker AM, Busso C, Dekker RFH, Alves da Cunha MA. Sulfonated (1→6)-β-d-Glucan (Lasiodiplodan): Preparation, Characterization and Bioactive Properties. Food Technol Biotechnol 2019; 57:490-502. [PMID: 32123511 PMCID: PMC7029391 DOI: 10.17113/ftb.57.04.19.6264] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 12/05/2019] [Indexed: 11/13/2022] Open
Abstract
Sulfonated derivatives of lasiodiplodan (LAS-S) with different degrees of substitution (1.61, 1.42, 1.02 and 0.15) were obtained and characterized by Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and thermal and solubility analyses. Antimicrobial, antioxidant and cytotoxic potential were also assessed. The sulfonation was confirmed by FTIR analysis with specific bands at 1250 cm-1 (S=O, strong asymmetrical stretching vibration) and at 810 cm-1 (C-O-S, symmetrical vibration associated with the C-O-SO3 group) in the sulfonated samples. SEM demonstrated that sulfonation promoted morphological changes on the surface of the biopolymer with heterogeneous fibrillary structures appearing along the surface following chemical modification. LAS-S showed high thermal stability, with mass loss due to oxidation at temperatures close to 460 °C. Sulfonation increased the solubility of LAS, and in addition, increased the antimicrobial activity, especially against Candida albicans (fungicidal) and Salmonella enterica Typhimurium (bacteriostatic). Native lasiodiplodan (LAS-N) showed higher OH˙ removal capacity, while LAS-S had higher ferric ion reducing antioxidant power (FRAP) potential. LAS-N and LAS-S did not demonstrate lethal cytotoxicity against wild and mutant strains of Saccharomyces cerevisiae. Samples with higher degree of substitution (1.42 and 1.61) showed lower potential to induce oxidative stress.
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Affiliation(s)
- Gabrielle Cristina Calegari
- Chemistry Department, Federal University of Technology - Paraná, Via do Conhecimento, Km 1, 85503-390 Pato Branco, PR, Brazil
| | | | - Aneli M. Barbosa-Dekker
- Chemistry Department, State University of Londrina, Rod. Celso Garcia Cid, Km 380, 86057-970 Londrina, PR, Brazil
| | - Cleverson Busso
- Bioprocess and Biotechnology Engineering Coordination, Federal University of Technology - Paraná, Rua Cristo Rei, 19, 85902-490 Toledo, PR, Brazil
| | - Robert F. H. Dekker
- Graduate Program in Environmental Engineering, Federal University of Technology - Paraná, Estr. dos Pioneiros, 3131, 86036-370 Londrina, PR, Brazil
| | - Mário Antônio Alves da Cunha
- Chemistry Department, Federal University of Technology - Paraná, Via do Conhecimento, Km 1, 85503-390 Pato Branco, PR, Brazil
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25
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Tuyun AF, Yıldız M, Bayrak N, Yıldırım H, Mataracı Kara E, Jannuzzi AT, Ozbek Celik B. Discovery of a new family of heterocyclic amine linked plastoquinone analogs for antimicrobial evaluation. Drug Dev Res 2019; 80:1098-1109. [DOI: 10.1002/ddr.21591] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 07/30/2019] [Accepted: 07/31/2019] [Indexed: 12/14/2022]
Affiliation(s)
- Amaç F. Tuyun
- Engineering Sciences Department, Engineering FacultyIstanbul University‐Cerrahpasa Istanbul Turkey
| | - Mahmut Yıldız
- Chemistry DepartmentGebze Technical University Gebze Kocaeli Turkey
| | - Nilüfer Bayrak
- Chemistry Department, Engineering FacultyIstanbul University‐Cerrahpasa Istanbul Turkey
| | - Hatice Yıldırım
- Chemistry Department, Engineering FacultyIstanbul University‐Cerrahpasa Istanbul Turkey
| | - Emel Mataracı Kara
- Pharmaceutical Microbiology Department, Pharmacy FacultyIstanbul University Istanbul Turkey
| | - Ayse T. Jannuzzi
- Pharmaceutical Toxicology Department, Pharmacy FacultyIstanbul University Istanbul Turkey
| | - Berna Ozbek Celik
- Pharmaceutical Microbiology Department, Pharmacy FacultyIstanbul University Istanbul Turkey
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26
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Mulat M, Pandita A, Khan F. Medicinal Plant Compounds for Combating the Multi-drug Resistant Pathogenic Bacteria: A Review. Curr Pharm Biotechnol 2019; 20:183-196. [PMID: 30854956 DOI: 10.2174/1872210513666190308133429] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 02/26/2019] [Accepted: 03/02/2019] [Indexed: 01/13/2023]
Abstract
BACKGROUND Globally, people utilize plants as the main source of remedy to heal various ailments. Medicinal plants have been utilized to treat ailments since the invention of modern scientific systems of medicine. The common remedy of infectious diseases mainly depends on the inhibition capacity of compounds or killing potential. The issue may give a clue for the development of a novel antimicrobial agent. METHODS Currently, microorganisms which are resistant towards antibiotics are probably a matter of serious concern for the overall well-being of health. At the moment, new therapeutic targets aside from the microorganism wall-based activities are in progress. For instance, the autoinducer molecules produced by the quorum sensing system are used to control antibiotic resistance and biofilm formation. RESULTS This therapeutic target is well-studied worldwide, however, the scientific data are not updated and only current studies started to gain insight into its perspective as a target to struggle against infectious diseases. Microbial resistance against antimicrobial compounds is a topic of serious concern in recent time. CONCLUSION Hence, this paper aims to confer a current overview of the novel compounds, quorum sensing, quorum quenching, biofilm formation in the development of antibiotic resistance and an update on their importance as a potential target for natural substances.
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Affiliation(s)
- Mulugeta Mulat
- Department of Biotechnology, School of Engineering and Technology, Sharda University, Greater Noida-201306, U.P, India.,Division of Microbiology, College of Natural Science, Wollo University, Dessie, Ethiopia
| | - Archana Pandita
- Department of Biotechnology, School of Engineering and Technology, Sharda University, Greater Noida-201306, U.P, India
| | - Fazlurrahman Khan
- Department of Biotechnology, School of Engineering and Technology, Sharda University, Greater Noida-201306, U.P, India.,Marine-Integrated Bionics Research Center, Pukyong National University, Busan 48513, South Korea
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27
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Ou-Yang F, Tsai IH, Tang JY, Yen CY, Cheng YB, Farooqi AA, Chen SR, Yu SY, Kao JK, Chang HW. Antiproliferation for Breast Cancer Cells by Ethyl Acetate Extract of Nepenthes thorellii x ( ventricosa x maxima). Int J Mol Sci 2019; 20:ijms20133238. [PMID: 31266224 PMCID: PMC6651324 DOI: 10.3390/ijms20133238] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 06/25/2019] [Accepted: 06/28/2019] [Indexed: 12/15/2022] Open
Abstract
Extracts from the Nepenthes plant have anti-microorganism and anti-inflammation effects. However, the anticancer effect of the Nepenthes plant is rarely reported, especially for breast cancer cells. Here, we evaluate the antitumor effects of the ethyl acetate extract of Nepenthesthorellii x (ventricosa x maxima) (EANT) against breast cancer cells. Cell viability and flow cytometric analyses were used to analyze apoptosis, oxidative stress, and DNA damage. EANT exhibits a higher antiproliferation ability to two breast cancer cell lines (MCF7 and SKBR3) as compared to normal breast cells (M10). A mechanistic study demonstrates that EANT induces apoptosis in breast cancer cells with evidence of subG1 accumulation and annexin V increment. EANT also induces glutathione (GSH) depletion, resulting in dramatic accumulations of reactive oxygen species (ROS) and mitochondrial superoxide (MitoSOX), as well as the depletion of mitochondrial membrane potential (MMP). These oxidative stresses attack DNA, respectively leading to DNA double strand breaks and oxidative DNA damage in γH2AX and 8-oxo-2′deoxyguanosine (8-oxodG) assays. Overall these findings clearly revealed that EANT induced changes were suppressed by the ROS inhibitor. In conclusion, our results have shown that the ROS-modulating natural product (EANT) has antiproliferation activity against breast cancer cells through apoptosis, oxidative stress, and DNA damage.
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Affiliation(s)
- Fu Ou-Yang
- Division of Breast Surgery and Department of Surgery, Kaohsiung Medical University Hospital, Kaohsiung 80708, Taiwan
- Cancer Center, Kaohsiung Medical University Hospital, Kaohsiung 80708, Taiwan
| | - I-Hsuan Tsai
- Department of Biomedical Science and Environmental Biology, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Jen-Yang Tang
- Department of Radiation Oncology, Faculty of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
- Department of Radiation Oncology, Kaohsiung Medical University Hospital, Kaohsiung 80708, Taiwan
| | - Ching-Yu Yen
- Department of Oral and Maxillofacial Surgery Chi-Mei Medical Center, Tainan 71004, Taiwan
- School of Dentistry, Taipei Medical University, Taipei 11050, Taiwan
| | - Yuan-Bin Cheng
- Graduate Institute of Natural Products, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Ammad Ahmad Farooqi
- Institute of Biomedical and Genetic Engineering (IBGE), Islamabad 44000, Pakistan
| | - Shu-Rong Chen
- Graduate Institute of Natural Products, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Szu-Yin Yu
- Graduate Institute of Natural Products, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Jun-Kai Kao
- Institute of Biomedical Sciences, National Chung Hsing University, Taichung 40227, Taiwan.
- Pediatric Department, Children's Hospital, Changhua Christian Hospital, Changhua 50006, Taiwan.
- School of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan.
| | - Hsueh-Wei Chang
- Cancer Center, Kaohsiung Medical University Hospital, Kaohsiung 80708, Taiwan.
- Department of Biomedical Science and Environmental Biology, Kaohsiung Medical University, Kaohsiung 80708, Taiwan.
- Drug Development and Value Creation Research Center, Kaohsiung Medical University, Kaohsiung 80708, Taiwan.
- Institute of Medical Science and Technology, National Sun Yat-sen University, Kaohsiung 80424, Taiwan.
- Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung 80708, Taiwan.
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Castro FAV, de Souza GFM, Pereira MD. Characterization of lapachol cytotoxicity: contribution of glutathione depletion for oxidative stress in Saccharomyces cerevisiae. Folia Microbiol (Praha) 2019; 65:197-204. [PMID: 31183610 DOI: 10.1007/s12223-019-00722-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Accepted: 05/30/2019] [Indexed: 12/12/2022]
Abstract
Over the years, quinones or its derivatives have been extensively studied due to their broad therapeutic spectrum. However, due to the significant structural differences between the individual naturally occurring quinones, investigation of the precise mechanism of their action is essential. In this context, we have analyzed the mechanism of lapachol [4-hydroxy-3-(3-methylbut-2-enyl)naphthalene-1,2-dione] toxicity using Saccharomyces cerevisiae as eukaryotic model organism. Analyzing yeast (wild type, sod1∆, and gsh1∆) cell growth, we observed a strong cytostatic effect caused by lapachol exposure. Moreover, survival of cells was affected by time- and dose-dependent manner. Interestingly, sod1∆ cells were more prone to lapachol toxicity. In this sense, mitochondrial functioning of sod1∆ cells were highly affected by exposure to this quinone. Lapachol also decreased glutathione (GSH) levels in wild type and sod1∆ cells even though glutathione disulfide (GSSG) remained unchanged. We believe that reduction of GSH contents has contributed to the enhancement of lipid peroxidation and intracellular oxidation, effect much more pronounced in sod1∆ cells. Overall, the collected data suggest that although lapachol can act as an oxidant, it seems that the main mechanism of its action initially consists in alkylation of intracellular targets such as GSH and then generating oxidative stress.
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Affiliation(s)
- Frederico A V Castro
- Departamento de Bioquímica, Instituto de Química, Universidade Federal do Rio de Janeiro, Avenida Athos da Silveira Ramos, 149, Bloco A, 5° andar, Lab. 549-C, Cidade Universitária, Rio de Janeiro, RJ, CEP: 21.941-909, Brazil
| | - Gabriel F M de Souza
- Departamento de Bioquímica, Instituto de Química, Universidade Federal do Rio de Janeiro, Avenida Athos da Silveira Ramos, 149, Bloco A, 5° andar, Lab. 549-C, Cidade Universitária, Rio de Janeiro, RJ, CEP: 21.941-909, Brazil
| | - Marcos D Pereira
- Departamento de Bioquímica, Instituto de Química, Universidade Federal do Rio de Janeiro, Avenida Athos da Silveira Ramos, 149, Bloco A, 5° andar, Lab. 549-C, Cidade Universitária, Rio de Janeiro, RJ, CEP: 21.941-909, Brazil.
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29
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Wellington KW, Nyoka NBP, McGaw LJ. Investigation of the antibacterial and antifungal activity of thiolated naphthoquinones. Drug Dev Res 2019; 80:386-394. [PMID: 30609114 DOI: 10.1002/ddr.21512] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Revised: 11/06/2018] [Accepted: 12/15/2018] [Indexed: 12/24/2022]
Abstract
The WHO has stated that antibiotic resistance is escalating to perilously high levels globally and that traditional therapies of antimicrobial drugs are futile against infections caused by resistant microorganisms. Novel antimicrobial drugs are therefore required. We report in this study on the inhibitory activity of the 1,4-naphthoquinone-2,3-bis-sulfides and 1,4-naphthoquinone sulfides against two bacteria and a fungus to determine their antimicrobial properties. The 1,4-naphthoquinone sulfides have potent activity with a minimum inhibitory concentration (MIC) of 7.8 μg/mL against Staphylococcus aureus (Gram +ve), an MIC of 23.4 μg/mL against the fungus, Candida albicans, which was better than that of Amphotericin B (MIC = 31.3 μg/mL), and against Escherichia coli (Gram -ve) an MIC of 31.3 μg/mL was obtained. The 1,4-naphthoquinone had an MIC of 11.7 μg/mL against S. aureus and the 1,4-naphthohydroquinone also had the same activity against E. coli. Hit, Lead & Candidate Discovery.
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Affiliation(s)
| | - Nomgqibelo B P Nyoka
- Phytomedicine Programme, Department of Paraclinical Sciences, Faculty of Veterinary Sciences, University of Pretoria, Onderstepoort, South Africa
| | - Lyndy J McGaw
- Phytomedicine Programme, Department of Paraclinical Sciences, Faculty of Veterinary Sciences, University of Pretoria, Onderstepoort, South Africa
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30
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Joshi P, Kang SY, Datar A, Lee MY. High-Throughput Assessment of Mechanistic Toxicity of Chemicals in Miniaturized 3D Cell Culture. ACTA ACUST UNITED AC 2018; 79:e66. [PMID: 30387930 DOI: 10.1002/cptx.66] [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] [Indexed: 12/14/2022]
Abstract
High-content imaging (HCI) assays on two-dimensional (2D) cell cultures often do not represent in vivo characteristics accurately, thus reducing the predictability of drug toxicity/efficacy in vivo. On the other hand, conventional 3D cell cultures are relatively low throughput and possess difficulty in cell imaging. To address these limitations, a miniaturized 3D cell culture has been developed on a micropillar/microwell chip platform with human cells encapsulated in biomimetic hydrogels. Model compounds are used to validate human cell microarrays for high-throughput assessment of mechanistic toxicity. Main mechanisms of toxicity of compounds can be investigated by analyzing multiple parameters such as DNA damage, mitochondrial impairment, intracellular glutathione level, and cell membrane integrity. IC50 values of these parameters can be determined and compared for the compounds to investigate the main mechanism of toxicity. This paper describes miniaturized HCI assays on 3D-cultured cell microarrays for high-throughput assessment of mechanistic profiles of compound-induced toxicity. © 2018 by John Wiley & Sons, Inc.
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Affiliation(s)
- Pranav Joshi
- Department of Chemical and Biomedical Engineering, Cleveland State University, Cleveland, Ohio
| | - Soo-Yeon Kang
- Department of Chemical and Biomedical Engineering, Cleveland State University, Cleveland, Ohio
| | - Akshata Datar
- Department of Chemical and Biomedical Engineering, Cleveland State University, Cleveland, Ohio
| | - Moo-Yeal Lee
- Department of Chemical and Biomedical Engineering, Cleveland State University, Cleveland, Ohio
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31
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Wellington KW, Kolesnikova NI, Nyoka NBP, McGaw LJ. Investigation of the antimicrobial and anticancer activity of aminonaphthoquinones. Drug Dev Res 2018; 80:138-146. [PMID: 30284739 DOI: 10.1002/ddr.21477] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Revised: 09/07/2018] [Accepted: 09/13/2018] [Indexed: 01/18/2023]
Abstract
In this study, we report on the inhibitory activity of synthesized aminonaphthoquinones against two bacterial and one fungal species to determine their antimicrobial properties. A minimum inhibitory concentration (MIC) of 7.8 μg/mL was obtained against the fungus, Candida albicans, which was better than that of Amphotericin B (MIC = 31.25 μg/mL). Escherichia coli (Gram -), was inhibited at a MIC of 23.4 μg/mL and Staphylococcus aureus (Gram +) at a MIC of 31.3 μg/mL. The aminonaphthoquinones were also screened against HCT116 colon, PC3 prostate and HepG2 liver cancer cell lines to evaluate their cytostatic effects. They had potent activity (GI50 = 5.87-9.90 μM) which was about three-6-fold better than that of parthenolide (GI50 = 25.97 μM) against the prostate cancer cell line. These compounds were generally more selective for cancer cells than for normal human lung fetal fibroblasts (WI-38).
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Affiliation(s)
| | | | - Nomgqibelo B P Nyoka
- Faculty of Veterinary Sciences, Department of Paraclinical Sciences, Phytomedicine Programme, University of Pretoria, Onderstepoort, South Africa
| | - Lyndy J McGaw
- Faculty of Veterinary Sciences, Department of Paraclinical Sciences, Phytomedicine Programme, University of Pretoria, Onderstepoort, South Africa
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Arumugam P, Shankaran D, Bothra A, Gandotra S, Rao V. The MmpS6-MmpL6 Operon Is an Oxidative Stress Response System Providing Selective Advantage toMycobacterium tuberculosisin Stress. J Infect Dis 2018; 219:459-469. [DOI: 10.1093/infdis/jiy526] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Accepted: 08/30/2018] [Indexed: 12/20/2022] Open
Affiliation(s)
- Prabhakar Arumugam
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, India
- Academy of Scientific and Innovative Research, New Delhi, India
| | - Deepthi Shankaran
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, India
- Academy of Scientific and Innovative Research, New Delhi, India
| | - Ankur Bothra
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, India
- Academy of Scientific and Innovative Research, New Delhi, India
| | - Sheetal Gandotra
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, India
- Academy of Scientific and Innovative Research, New Delhi, India
| | - Vivek Rao
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, India
- Academy of Scientific and Innovative Research, New Delhi, India
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33
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Lawsone-loaded Niosome and its antitumor activity in MCF-7 breast Cancer cell line: a Nano-herbal treatment for Cancer. ACTA ACUST UNITED AC 2018; 26:11-17. [PMID: 30159762 PMCID: PMC6154483 DOI: 10.1007/s40199-018-0207-3] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Accepted: 07/18/2018] [Indexed: 10/29/2022]
Abstract
Phytochemicals like Lawsone have some drawbacks that stem from their poor solubility. Low solubility in aqueous mediums results in low bioavailability, poor permeability and instability of phytochemical compounds in biological environments. The aim of this study was to design nanoniosomes containing Lawsone (Law) using non-ionic surfactants and cholesterol. Niosomes were prepared by thin film hydration method (TFH). Then, they were loaded with Henna extract (HLaw) and standard Lawsone (SLaw), and two resulted formulations were compared. The henna extract was analyzed by mass gas chromatography. Size, zeta potential, polydispersity index (PDI) and morphology of the loaded formulations were evaluated by dynamic light scattering (DLS) and scanning electron spectroscopy (SEM). The incorporation and release rate of Law from niosome bilayers were evaluated by UV-Vis spectroscopy. In vitro experiments were carried out to evaluate antitumor activity in MCF-7 cell line. The results showed distinct spherical shapes and particle sizes were about 250 nm in diameter and have negative zeta potentials. Niosomes were stable at 4 °C for 2 months. Entrapment efficiently of both formulations was about 70% and showed a sustained release profile. In vitro study exhibited that using of niosome to encapsulating Law can significantly increase antitumor activity of formulation in MCF-7 cell line compared to Law solution (free Law). Thus, niosomes are a promising carrier system for delivery of phytochemical compounds that have poor solubility in biological fluids. Graphical abstract ᅟ.
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Krychowiak M, Kawiak A, Narajczyk M, Borowik A, Królicka A. Silver Nanoparticles Combined With Naphthoquinones as an Effective Synergistic Strategy Against Staphylococcus aureus. Front Pharmacol 2018; 9:816. [PMID: 30140226 PMCID: PMC6094968 DOI: 10.3389/fphar.2018.00816] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 07/09/2018] [Indexed: 12/15/2022] Open
Abstract
Staphylococcus aureus is a human pathogen responsible for many antibiotic-resistant infections, for instance burn wound infections, which pose a threat to human life. Exploring possible synergy between various antimicrobial agents, like nanoparticles and plant natural products, may provide new weapons to combat antibiotic resistant pathogens. The objective of this study was to examine the potential of silver nanoparticles (AgNPs) to enhance the antimicrobial activity of selected naphthoquinones (NQs): plumbagin (PL), ramentaceone (RAM), droserone (DR), and 3-chloroplumbagin (3ChPL). We also attempted to elucidate the mechanism by which the AgNPs enhance the antimicrobial activity of NQs. We analyzed the interaction of AgNPs with bacterial membrane and its effect on membrane stability (TEM analysis, staining with SYTO9 and propidium iodide), as well as aggregation of NQs on the surface of nanoparticles (UV-Vis spectroscopy and DLS analysis). Our results demonstrated clearly a synergistic activity of AgNPs and three out of four tested NQs (FBC indexes ≤ 0.375). This resulted in an increase in their combined bactericidal effect toward the S. aureus reference strain and the clinical isolates, which varied in resistance profiles. The synergistic effect (FBC index = 0.375) resulting from combining 3ChPL with silver nitrate used as a control, emphasized the role of the ionic form of silver released from nanoparticles in their bactericidal activity in combination with NQs. The role of membrane damage and AgNPs-NQ interactions in the observed synergy of silver nanoparticles and NQs was also confirmed. Moreover, the described approach, based on the synergistic interaction between the above mentioned agents enables a reduction of their effective doses, thus significantly reducing cytotoxic effect of NQs toward eukaryotic HaCaT cells. Therefore, the present study on the use of a combination of agents (AgNPs-NQs) suggests its potential use as a possible strategy to combat antibiotic-resistant S. aureus.
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Affiliation(s)
- Marta Krychowiak
- Laboratory of Biologically Active Compounds, Intercollegiate Faculty of Biotechnology, Medical University of Gdańsk, University of Gdańsk, Gdańsk, Poland
| | - Anna Kawiak
- Laboratory of Plant Protection and Biotechnology, Intercollegiate Faculty of Biotechnology UG and MUG, University of Gdańsk, Gdańsk, Poland
| | - Magdalena Narajczyk
- Laboratory of Electron Microscopy, Faculty of Biology, University of Gdańsk, Gdańsk, Poland
| | - Agnieszka Borowik
- Laboratory of Biophysics, Intercollegiate Faculty of Biotechnology UG and MUG, University of Gdańsk, Gdańsk, Poland
| | - Aleksandra Królicka
- Laboratory of Biologically Active Compounds, Intercollegiate Faculty of Biotechnology, Medical University of Gdańsk, University of Gdańsk, Gdańsk, Poland
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35
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Synthesis of copper(II) and zinc(II) complexes with chalcone–thiosemicarbazone hybrid ligands: X-ray crystallography, spectroscopy and yeast activity. TRANSIT METAL CHEM 2018. [DOI: 10.1007/s11243-018-0262-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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36
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Balke J, Volz P, Neumann F, Brodwolf R, Wolf A, Pischon H, Radbruch M, Mundhenk L, Gruber AD, Ma N, Alexiev U. Visualizing Oxidative Cellular Stress Induced by Nanoparticles in the Subcytotoxic Range Using Fluorescence Lifetime Imaging. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1800310. [PMID: 29726099 DOI: 10.1002/smll.201800310] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 03/16/2018] [Indexed: 06/08/2023]
Abstract
Nanoparticles hold a great promise in biomedical science. However, due to their unique physical and chemical properties they can lead to overproduction of intracellular reactive oxygen species (ROS). As an important mechanism of nanotoxicity, there is a great need for sensitive and high-throughput adaptable single-cell ROS detection methods. Here, fluorescence lifetime imaging microscopy (FLIM) is employed for single-cell ROS detection (FLIM-ROX) providing increased sensitivity and enabling high-throughput analysis in fixed and live cells. FLIM-ROX owes its sensitivity to the discrimination of autofluorescence from the unique fluorescence lifetime of the ROS reporter dye. The effect of subcytotoxic amounts of cationic gold nanoparticles in J774A.1 cells and primary human macrophages on ROS generation is investigated. FLIM-ROX measures very low ROS levels upon gold nanoparticle exposure, which is undetectable by the conventional method. It is demonstrated that cellular morphology changes, elevated senescence, and DNA damage link the resulting low-level oxidative stress to cellular adverse effects and thus nanotoxicity. Multiphoton FLIM-ROX enables the quantification of spatial ROS distribution in vivo, which is shown for skin tissue as a target for nanoparticle exposure. Thus, this innovative method allows identifying of low-level ROS in vitro and in vivo and, subsequently, promotes understanding of ROS-associated nanotoxicity.
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Affiliation(s)
- Jens Balke
- Department of Physics, Freie Universität Berlin, Arnimalllee 14, 14195, Berlin, Germany
| | - Pierre Volz
- Department of Physics, Freie Universität Berlin, Arnimalllee 14, 14195, Berlin, Germany
| | - Falko Neumann
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Takustraße 3, 14195, Berlin, Germany
| | - Robert Brodwolf
- Department of Physics, Freie Universität Berlin, Arnimalllee 14, 14195, Berlin, Germany
- Helmholtz Virtual Institute-Multifunctional Biomaterials for Medicine, Helmholtz-Zentrum Geesthacht Kantstr. 55, 14513, Teltow, Germany
| | - Alexander Wolf
- Department of Physics, Freie Universität Berlin, Arnimalllee 14, 14195, Berlin, Germany
| | - Hannah Pischon
- Institute of Veterinary Pathology, Freie Universität Berlin, Robert-von-Ostertagstraße 15, 14163, Berlin, Germany
| | - Moritz Radbruch
- Institute of Veterinary Pathology, Freie Universität Berlin, Robert-von-Ostertagstraße 15, 14163, Berlin, Germany
| | - Lars Mundhenk
- Institute of Veterinary Pathology, Freie Universität Berlin, Robert-von-Ostertagstraße 15, 14163, Berlin, Germany
| | - Achim D Gruber
- Institute of Veterinary Pathology, Freie Universität Berlin, Robert-von-Ostertagstraße 15, 14163, Berlin, Germany
| | - Nan Ma
- Helmholtz-Zentrum Geesthacht (HZG), Institut für Biomaterialforschung Kantstr. 55, 14513, Teltow, Germany
| | - Ulrike Alexiev
- Department of Physics, Freie Universität Berlin, Arnimalllee 14, 14195, Berlin, Germany
- Helmholtz Virtual Institute-Multifunctional Biomaterials for Medicine, Helmholtz-Zentrum Geesthacht Kantstr. 55, 14513, Teltow, Germany
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37
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Highly Efficient Synthesis and Structure-Activity Relationships of a Small Library of Substituted 1,4-Naphthoquinones. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800207] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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38
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Joshi P, Datar A, Yu KN, Kang SY, Lee MY. High-content imaging assays on a miniaturized 3D cell culture platform. Toxicol In Vitro 2018; 50:147-159. [PMID: 29501531 DOI: 10.1016/j.tiv.2018.02.014] [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: 10/24/2017] [Revised: 02/19/2018] [Accepted: 02/20/2018] [Indexed: 12/17/2022]
Abstract
The majority of high-content imaging (HCI) assays have been performed on two-dimensional (2D) cell monolayers for its convenience and throughput. However, 2D-cultured cell models often do not represent the in vivo characteristics accurately and therefore reduce the predictability of drug toxicity/efficacy in vivo. Recently, three-dimensional (3D) cell-based HCI assays have been demonstrated to improve predictability, but its use is limited due to difficulty in maneuverability and low throughput in cell imaging. To alleviate these issues, we have developed miniaturized 3D cell culture on a micropillar/microwell chip and demonstrated high-throughput HCI assays for mechanistic toxicity. Briefly, Hep3B human hepatoma cell line was encapsulated in a mixture of alginate and fibrin gel on the micropillar chip, cultured in 3D, and exposed to six model compounds in the microwell chip for rapidly assessing mechanistic hepatotoxicity. Several toxicity parameters, including DNA damage, mitochondrial impairment, intracellular glutathione level, and cell membrane integrity were measured on the chip, and the IC50 values of the compounds at different readouts were determined to investigate the mechanism of toxicity. Overall, the Z' factors were between 0.6 and 0.8 for the HCI assays, and the coefficient of variation (CV) were below 20%. These results indicate high robustness and reproducibility of the HCI assays established on the miniaturized 3D cell culture chip. In addition, it was possible to determine the predominant mechanism of toxicity using the 3D HCI assays. Therefore, our miniaturized 3D cell culture coupled with HCI assays has great potential for high-throughput screening (HTS) of compounds and mechanistic toxicity profiling.
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Affiliation(s)
- Pranav Joshi
- Department of Chemical and Biomedical Engineering, Cleveland State University, 455 Fenn Hall, 1960 East 24th Street, Cleveland, OH 44115-2214, USA
| | - Akshata Datar
- Department of Chemical and Biomedical Engineering, Cleveland State University, 455 Fenn Hall, 1960 East 24th Street, Cleveland, OH 44115-2214, USA
| | - Kyeong-Nam Yu
- Department of Chemical and Biomedical Engineering, Cleveland State University, 455 Fenn Hall, 1960 East 24th Street, Cleveland, OH 44115-2214, USA
| | - Soo-Yeon Kang
- Department of Chemical and Biomedical Engineering, Cleveland State University, 455 Fenn Hall, 1960 East 24th Street, Cleveland, OH 44115-2214, USA
| | - Moo-Yeal Lee
- Department of Chemical and Biomedical Engineering, Cleveland State University, 455 Fenn Hall, 1960 East 24th Street, Cleveland, OH 44115-2214, USA.
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Zampol MA, Barros MH. Melatonin improves survival and respiratory activity of yeast cells challenged by alpha-synuclein and menadione. Yeast 2017; 35:281-290. [PMID: 29143358 DOI: 10.1002/yea.3296] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Revised: 10/20/2017] [Accepted: 11/04/2017] [Indexed: 11/10/2022] Open
Abstract
One of the hallmarks of Parkinson disease is α-synuclein aggregate deposition that leads to endoplasmic reticulum stress, Golgi fragmentation and impaired energy metabolism with consequent redox imbalance. In the last decade, many studies have used Saccharomyces cerevisiae as a model in order to explore the intracellular consequences of α-synuclein overexpression. In this study we propose to evaluate the respiratory outcome of yeast cells expressing α-synuclein. Cell viability or growth on selective media for respiratory activity was mainly affected in the α-synuclein-expressing cells if they were also treated with menadione, which stimulates reactive oxygen species production. We also tested whether melatonin, a natural antioxidant, would counteract the deleterious effects of α-synuclein and menadione. In fact, melatonin addition improved the respiratory growth of α-synuclein/menadione-challenged cells, presented a general improvement in the enzymatic activity of the respiratory complexes and finally elevated the rate of mitophagy, an important cellular process necessary for the clearance of damaged mitochondria. Altogether, our data confirms that α-synuclein impairs respiration in yeast, which can be rescued by melatonin addition.
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Affiliation(s)
- Mariana A Zampol
- Departamento de Microbiologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brazil
| | - Mario H Barros
- Departamento de Microbiologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brazil
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40
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Teixeira J, Amorim R, Santos K, Soares P, Datta S, Cortopassi GA, Serafim TL, Sardão VA, Garrido J, Borges F, Oliveira PJ. Disruption of mitochondrial function as mechanism for anti-cancer activity of a novel mitochondriotropic menadione derivative. Toxicology 2017; 393:123-139. [PMID: 29141199 DOI: 10.1016/j.tox.2017.11.014] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Revised: 10/27/2017] [Accepted: 11/10/2017] [Indexed: 12/14/2022]
Abstract
Menadione, also known as vitamin K3, is a 2-methyl-1,4 naphthoquinone with a potent cytotoxic activity mainly resulting from its quinone redox-cycling with production of reactive oxygen species (ROS). Although increased ROS generation is considered a relevant mechanism in cancer cell death, it may not be sufficiently effective to kill cancer cells due to phenotypic adaptations. Therefore, combining ROS-generating agents with other molecules targeting important cancer cell phenotypes can be an effective therapeutic strategy. As mitochondrial dysfunction has been implicated in many human diseases, including cancer, we describe here the discovery of a mitochondrial-directed agent (MitoK3), which was developed by conjugating a TPP cation to the C3 position of the menadione's naphthoquinone ring, increasing its selective accumulation in mitochondria, as well as led to alterations of its redox properties and consequent biological outcome. MitoK3 disturbed the mitochondrial bioenergetic apparatus, with subsequent loss of mitochondrial ATP production. The combinatory strategy of MitoK3 with anticancer agent doxorubicin (DOX) resulted in a degree of cytotoxicity higher than those of the individual molecules, as the combination triggered tumour apoptotic cell death evident by caspase 3/9 activities, probably through mitochondrial destabilization or by interference with mitochondrial redox processes. The results of this investigation support the importance of drug discovery process in developing molecules that can be use as adjuvant therapy in patients with specific cancer subtypes.
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Affiliation(s)
- José Teixeira
- CIQUP/Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Porto, Portugal; CNC - Center for Neuroscience and Cell Biology, University of Coimbra, UC-Biotech Building, Biocant Park - Cantanhede, Portugal
| | - Ricardo Amorim
- CIQUP/Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Porto, Portugal
| | - Katia Santos
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra, UC-Biotech Building, Biocant Park - Cantanhede, Portugal
| | - Pedro Soares
- CIQUP/Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Porto, Portugal
| | - Sandipan Datta
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California, Davis, USA
| | - Gino A Cortopassi
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California, Davis, USA
| | - Teresa L Serafim
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra, UC-Biotech Building, Biocant Park - Cantanhede, Portugal
| | - Vilma A Sardão
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra, UC-Biotech Building, Biocant Park - Cantanhede, Portugal
| | - Jorge Garrido
- CIQUP/Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Porto, Portugal; Department of Chemical Engineering, School of Engineering (ISEP), Polytechnic Institute of Porto, Porto, Portugal
| | - Fernanda Borges
- CIQUP/Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Porto, Portugal.
| | - Paulo J Oliveira
- CNC - Center for Neuroscience and Cell Biology, University of Coimbra, UC-Biotech Building, Biocant Park - Cantanhede, Portugal.
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Mahalapbutr P, Nutho B, Wolschann P, Chavasiri W, Kungwan N, Rungrotmongkol T. Molecular insights into inclusion complexes of mansonone E and H enantiomers with various β-cyclodextrins. J Mol Graph Model 2017; 79:72-80. [PMID: 29154164 DOI: 10.1016/j.jmgm.2017.11.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Revised: 11/06/2017] [Accepted: 11/07/2017] [Indexed: 10/18/2022]
Abstract
The structural dynamics and stability of inclusion complexes of mansonone E (ME) and H (MH) including their stereoisomers with various βCDs (methylated- and hydroxypropylated-βCDs) were investigated by classical molecular dynamics (MD) simulations and binding free energy calculations. The simulation results revealed that mansonones are able to form inclusion complexes with βCDs. The guest molecules are not completely inserted into the host cavity, their preferably positions are nearby the secondary rim with the oxane ring dipping into the hydrophobic inner cavity. The encapsulation process leads to a higher rigidity of the βCDs enhancing the intramolecular hydrogen bond formation ability and decreasing the chance of glucopyranose rotation. According to the MM-PBSA binding free energy calculation, all considered inclusion complexes are stable and the binding energies are mainly caused by van der Waals interactions. Moreover, the free energy calculations showed significant differences in the complexation energies for the stereoisomers, which could enable the separation of the isomers by analytical techniques for further pharmaceutical applications.
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Affiliation(s)
- Panupong Mahalapbutr
- Structural and Computational Biology Research Group, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Bodee Nutho
- Program in Biotechnology, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Peter Wolschann
- Structural and Computational Biology Research Group, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand; Department of Pharmaceutical Technology and Biopharmaceutics, University of Vienna, Vienna, 1090, Austria; Institute of Theoretical Chemistry, University of Vienna, Vienna, 1090, Austria
| | - Warinthorn Chavasiri
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Nawee Kungwan
- Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand; Research Center on Chemistry for Development of Health Promoting Products from Northern Resources, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Thanyada Rungrotmongkol
- Structural and Computational Biology Research Group, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand; Program in Bioinformatics and Computational Biology, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand.
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42
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León-García MC, Ríos-Castro E, López-Romero E, Cuéllar-Cruz M. Evaluation of cell wall damage by dimethyl sulfoxide in Candida species. Res Microbiol 2017. [PMID: 28629869 DOI: 10.1016/j.resmic.2017.06.001] [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] [Indexed: 01/20/2023]
Abstract
Studies dealing with the response of microorganisms to oxidative stress require the dissolution of oxidant agents in an appropriate solvent. A commonly used medium is dimethyl sulfoxide, which has been considered as an innocuous polar solvent. However, we have observed significant differences between control, untreated cells and those receiving increasing amounts of the oxidant and hence increasing amounts of DMSO, to the maximum allowed of 1%. Here we show that, while this solvent does not influence yeast cell viability, it does affect expression of cell wall proteins as well as catalase activity. Therefore, its use in future studies of oxidative stress as an innocuous solvent should be reconsidered.
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Affiliation(s)
- María Cristina León-García
- Departamento de Biología, División de Ciencias Naturales y Exactas, Campus Guanajuato, Universidad de Guanajuato, Noria Alta S/N, Col. Noria Alta, C.P. 36050, Guanajuato, Guanajuato, Mexico
| | - Emmanuel Ríos-Castro
- Unidad de Genómica, Proteómica y Metabolómica, LaNSE, Centro de Investigación y de Estudios Avanzados del I.P.N., Apdo. Postal 14-740, 07000, México, D.F., Mexico
| | - Everardo López-Romero
- Departamento de Biología, División de Ciencias Naturales y Exactas, Campus Guanajuato, Universidad de Guanajuato, Noria Alta S/N, Col. Noria Alta, C.P. 36050, Guanajuato, Guanajuato, Mexico
| | - Mayra Cuéllar-Cruz
- Departamento de Biología, División de Ciencias Naturales y Exactas, Campus Guanajuato, Universidad de Guanajuato, Noria Alta S/N, Col. Noria Alta, C.P. 36050, Guanajuato, Guanajuato, Mexico.
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Kong X, Luo J, Xu T, Zhou Y, Pan Z, Xie Y, Zhao L, Lu Y, Han X, Li Z, Liu L. Plumbagin enhances TRAIL-induced apoptosis of human leukemic Kasumi-1 cells through upregulation of TRAIL death receptor expression, activation of caspase-8 and inhibition of cFLIP. Oncol Rep 2017; 37:3423-3432. [DOI: 10.3892/or.2017.5627] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Accepted: 04/24/2017] [Indexed: 11/06/2022] Open
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The abundance of the ARL2 GTPase and its GAP, ELMOD2, at mitochondria are modulated by the fusogenic activity of mitofusins and stressors. PLoS One 2017; 12:e0175164. [PMID: 28380071 PMCID: PMC5381910 DOI: 10.1371/journal.pone.0175164] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Accepted: 03/21/2017] [Indexed: 12/05/2022] Open
Abstract
Mitochondria are essential, dynamic organelles that respond to a number of stressors with changes in morphology that are linked to several mitochondrial functions, though the mechanisms involved are poorly understood. We show that the levels of the regulatory GTPase ARL2 and its GAP, ELMOD2, are specifically increased at mitochondria in immortalized mouse embryo fibroblasts deleted for Mitofusin 2 (MFN2), but not MFN1. Elevated ARL2 and ELMOD2 in MEFs deleted for MFN2 could be reversed by re-introduction of MFN2, but only when the mitochondrial fragmentation in these MEFs was also reversed, demonstrating that reversal of elevated ARL2 and ELMOD2 requires the fusogenic activity of MFN2. Other stressors with links to mitochondrial morphology were investigated and several, including glucose or serum deprivation, also caused increases in ARL2 and ELMOD2. In contrast, a number of pharmacological inhibitors of energy metabolism caused increases in ARL2 without affecting ELMOD2 levels. Together we interpret these data as evidence of two ARL2-sensitive pathways in mitochondria, one affecting ATP levels that is independent of ELMOD2 and the other leading to mitochondrial fusion involving MFN2 that does involve ELMOD2.
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Zhang J, Peng S, Li X, Liu R, Han X, Fang J. Targeting thioredoxin reductase by plumbagin contributes to inducing apoptosis of HL-60 cells. Arch Biochem Biophys 2017; 619:16-26. [DOI: 10.1016/j.abb.2017.02.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Revised: 02/08/2017] [Accepted: 02/24/2017] [Indexed: 12/15/2022]
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46
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Kapadia GJ, Soares IAO, Rao GS, Badoco FR, Furtado RA, Correa MB, Tavares DC, Cunha WR, Magalhães LG. Antiparasitic activity of menadione (vitamin K 3) against Schistosoma mansoni in BABL/c mice. Acta Trop 2017; 167:163-173. [PMID: 28017859 DOI: 10.1016/j.actatropica.2016.12.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Revised: 11/03/2016] [Accepted: 12/01/2016] [Indexed: 12/25/2022]
Abstract
Schistosomiasis is one of the neglected tropical diseases affecting nearly quarter of a billion people in economically challenged tropical and subtropical countries of the world. Praziquantel (PZQ) is the only drug currently available to treat this parasitic disease in spite being ineffective against juvenile worms and concerns about developing resistance to treat reinfections. Our earlier in vitro viability studies demonstrated significant antiparasitic activity of menadione (MEN) (vitamin K3) against Schistosoma mansoni adult worms. To gain insight into plausible mechanism of antischistosomal activity of MEN, its effect on superoxide anion levels in adult worms were studied in vitro which showed significant increases in both female and male worms. Further confirmation of the deleterious morphological changes in their teguments and organelles were obtained by ultrastructural analysis. Genotoxic and cytotoxic studies in male Swiss mice indicated that MEN was well tolerated at the oral dose of 500mg/kg using the criteria of MNPCE frequency and PCE/RBC ratio in the bone marrow of infected animals. The in vivo antiparasitic activity of MEN was conducted in female BALB/c mice infected with S. mansoni and significant reductions (P<0.001) in total worm burden were observed at single oral doses of 40 and 400mg/kg (48.57 and 61.90%, respectively). Additionally, MEN significantly reduced (P<0.001) the number of eggs in the liver of infected mice by 53.57 and 58.76%, respectively. Similarly, histological analysis of the livers showed a significant reduction (P<0.001) in the diameter of the granulomas. Since MEN is already in use globally as an over-the-counter drug for a variety of common ailments and a dietary supplement with a safety record in par with similar products when used in recommended doses, the above antiparasitic results which compare reasonably well with PZQ, make a compelling case for considering MEN to treat S. mansoni infection in humans.
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Affiliation(s)
- Govind J Kapadia
- Department of Pharmaceutical Sciences, College of Pharmacy, Howard University, Washington, DC 20059, USA
| | - Ingrid A O Soares
- Research Group on Natural Products, Center for Research in Sciences and Technology, University of Franca, Franca, Brazil
| | - G Subba Rao
- Global Biotechnology Resource Center, 145 Rosewood Drive, Streamwood, IL 60107, USA
| | - Fernanda R Badoco
- Research Group on Natural Products, Center for Research in Sciences and Technology, University of Franca, Franca, Brazil
| | - Ricardo A Furtado
- Research Group on Natural Products, Center for Research in Sciences and Technology, University of Franca, Franca, Brazil
| | - Mariana B Correa
- Research Group on Natural Products, Center for Research in Sciences and Technology, University of Franca, Franca, Brazil
| | - Denise C Tavares
- Research Group on Natural Products, Center for Research in Sciences and Technology, University of Franca, Franca, Brazil
| | - Wilson R Cunha
- Research Group on Natural Products, Center for Research in Sciences and Technology, University of Franca, Franca, Brazil
| | - Lizandra G Magalhães
- Research Group on Natural Products, Center for Research in Sciences and Technology, University of Franca, Franca, Brazil.
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Lee KL, Yoo JS, Oh GS, Singh AK, Roe JH. Simultaneous Activation of Iron- and Thiol-Based Sensor-Regulator Systems by Redox-Active Compounds. Front Microbiol 2017; 8:139. [PMID: 28210250 PMCID: PMC5288332 DOI: 10.3389/fmicb.2017.00139] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Accepted: 01/19/2017] [Indexed: 12/21/2022] Open
Abstract
Bacteria in natural habitats are exposed to myriad redox-active compounds (RACs), which include producers of reactive oxygen species (ROS) and reactive electrophile species (RES) that alkylate or oxidize thiols. RACs can induce oxidative stress in cells and activate response pathways by modulating the activity of sensitive regulators. However, the effect of a certain compound on the cell has been investigated primarily with respect to a specific regulatory pathway. Since a single compound can exert multiple chemical effects in the cell, its effect can be better understood by time-course monitoring of multiple sensitive regulatory pathways that the compound induces. We investigated the effect of representative RACs by monitoring the activity of three sensor-regulators in the model actinobacterium Streptomyces coelicolor; SoxR that senses reactive compounds directly through oxidation of its [2Fe–2S] cluster, CatR/PerR that senses peroxides through bound iron, and an anti-sigma factor RsrA that senses RES via disulfide formation. The time course and magnitude of induction of their target transcripts were monitored to predict the chemical activities of each compound in S. coelicolor. Phenazine methosulfate (PMS) was found to be an effective RAC that directly activated SoxR and an effective ROS-producer that induced CatR/PerR with little thiol-perturbing activity. p-Benzoquinone was an effective RAC that directly activated SoxR, with slower ROS-producing activity, and an effective RES that induced the RsrA-SigR system. Plumbagin was an effective RAC that activated SoxR, an effective ROS-producer, and a less agile but effective RES. Diamide was an RES that effectively formed disulfides and a weak RAC that activated SoxR. Monobromobimane was a moderately effective RES and a slow producer of ROS. Interestingly, benzoquinone induced the SigR system by forming adducts on cysteine thiols in RsrA, revealing a new pathway to modulate RsrA activity. Overall, this study showed that multiple chemical activities of a reactive compound can be conveniently monitored in vivo by examining the temporal response of multiple sensitive regulators in the cell to reveal novel activities of the chemicals.
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Affiliation(s)
- Kang-Lok Lee
- School of Biological Sciences and Institute of Microbiology, Seoul National University Seoul, South Korea
| | - Ji-Sun Yoo
- School of Biological Sciences and Institute of Microbiology, Seoul National University Seoul, South Korea
| | - Gyeong-Seok Oh
- School of Biological Sciences and Institute of Microbiology, Seoul National University Seoul, South Korea
| | - Atul K Singh
- School of Biological Sciences and Institute of Microbiology, Seoul National University Seoul, South Korea
| | - Jung-Hye Roe
- School of Biological Sciences and Institute of Microbiology, Seoul National University Seoul, South Korea
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48
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de Carvalho MDC, De Mesquita JF, Eleutherio ECA. In Vivo Characterization of I91T Sod2 Polymorphism of Saccharomyces cerevisiae. J Cell Biochem 2017; 118:1078-1086. [DOI: 10.1002/jcb.25720] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Accepted: 08/30/2016] [Indexed: 11/09/2022]
Affiliation(s)
| | - Joelma Freire De Mesquita
- Department of Genetics and Molecular Biology; Federal University of the State of Rio de Janeiro (UNIRIO); Rio de Janeiro 22290-240 Brazil
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49
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Acrolein-Induced Oxidative Stress and Cell Death Exhibiting Features of Apoptosis in the Yeast Saccharomyces cerevisiae Deficient in SOD1. Cell Biochem Biophys 2016; 71:1525-36. [PMID: 25395196 PMCID: PMC4449388 DOI: 10.1007/s12013-014-0376-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The yeast Saccharomyces cerevisiae is a useful eukaryotic model to study the toxicity of acrolein, an important environmental toxin and endogenous product of lipid peroxidation. The study was aimed at elucidation of the cytotoxic effect of acrolein on the yeast deficient in SOD1, Cu, Zn-superoxide dismutase which is hypersensitive to aldehydes. Acrolein generated within the cell from its precursor allyl alcohol caused growth arrest and cell death of the yeast cells. The growth inhibition involved an increase in production of reactive oxygen species and high level of protein carbonylation. DNA condensation and fragmentation, exposition of phosphatidylserine at the cell surface as well as decreased dynamic of actin microfilaments and mitochondria disintegration point to the induction of apoptotic-type cell death besides necrotic cell death.
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50
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Crystal Structure of Saccharomyces cerevisiae ECM4, a Xi-Class Glutathione Transferase that Reacts with Glutathionyl-(hydro)quinones. PLoS One 2016; 11:e0164678. [PMID: 27736955 PMCID: PMC5063366 DOI: 10.1371/journal.pone.0164678] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Accepted: 09/28/2016] [Indexed: 12/16/2022] Open
Abstract
Glutathionyl-hydroquinone reductases (GHRs) belong to the recently characterized Xi-class of glutathione transferases (GSTXs) according to unique structural properties and are present in all but animal kingdoms. The GHR ScECM4 from the yeast Saccharomyces cerevisiae has been studied since 1997 when it was found to be potentially involved in cell-wall biosynthesis. Up to now and in spite of biological studies made on this enzyme, its physiological role remains challenging. The work here reports its crystallographic study. In addition to exhibiting the general GSTX structural features, ScECM4 shows extensions including a huge loop which contributes to the quaternary assembly. These structural extensions are probably specific to Saccharomycetaceae. Soaking of ScECM4 crystals with GS-menadione results in a structure where glutathione forms a mixed disulfide bond with the cysteine 46. Solution studies confirm that ScECM4 has reductase activity for GS-menadione in presence of glutathione. Moreover, the high resolution structures allowed us to propose new roles of conserved residues of the active site to assist the cysteine 46 during the catalytic act.
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