1
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Szerlauth A, Varga S, Szilagyi I. Molecular Antioxidants Maintain Synergistic Radical Scavenging Activity upon Co-Immobilization on Clay Nanoplatelets. ACS Biomater Sci Eng 2023; 9:5622-5631. [PMID: 37738637 PMCID: PMC10565722 DOI: 10.1021/acsbiomaterials.3c00909] [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: 07/06/2023] [Accepted: 09/12/2023] [Indexed: 09/24/2023]
Abstract
Unbalanced levels of reactive oxygen species (ROS) result in oxidative stress, affecting both biomedical and industrial processes. Antioxidants can prevent ROS overproduction and thus delay or inhibit their harmful effects. Herein, activities of two molecular antioxidants (gallic acid (GA), a well-known phenolic compound, and nicotinamide adenine dinucleotide (NADH), a vital biological cofactor) were tested individually and in combination to assess possible synergistic, additive, or antagonistic effects in free radical scavenging and in redox capacity assays. GA was a remarkable radical scavenger, and NADH exhibited moderate antioxidant activity, while their combination at different molar ratios led to a synergistic effect since the resulting activity was superior to the sum of the individual GA and NADH activities. Their coimmobilization was performed on the surface of delaminated layered double hydroxide clay nanoplatelets by electrostatic interactions, and the synergistic effect was maintained upon such a heterogenization of these molecular antioxidants. The coimmobilization of GA and NADH expands the range of their potential applications, in which separation of antioxidant additives is important during treatments or manufacturing processes.
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Affiliation(s)
- Adel Szerlauth
- MTA-SZTE Lendület
Biocolloids Research Group, Department of Physical Chemistry and Materials
Science, Interdisciplinary Excellence Centre, University of Szeged, Szeged H-6720, Hungary
| | - Szilárd Varga
- MTA-SZTE Lendület
Biocolloids Research Group, Department of Physical Chemistry and Materials
Science, Interdisciplinary Excellence Centre, University of Szeged, Szeged H-6720, Hungary
| | - Istvan Szilagyi
- MTA-SZTE Lendület
Biocolloids Research Group, Department of Physical Chemistry and Materials
Science, Interdisciplinary Excellence Centre, University of Szeged, Szeged H-6720, Hungary
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2
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Zhang M, Tang H, Yuan Y, Ou Z, Chen Z, Xu Y, Fu X, Zhao Z, Sun Y. The Role of Indoor Microbiome and Metabolites in Shaping Children's Nasal and Oral Microbiota: A Pilot Multi-Omic Analysis. Metabolites 2023; 13:1040. [PMID: 37887365 PMCID: PMC10608577 DOI: 10.3390/metabo13101040] [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: 08/31/2023] [Revised: 09/21/2023] [Accepted: 09/27/2023] [Indexed: 10/28/2023] Open
Abstract
Maintaining a diverse and well-balanced nasal and oral microbiota is vital for human health. However, the impact of indoor microbiome and metabolites on nasal and oral microbiota remains largely unknown. Fifty-six children in Shanghai were surveyed to complete a questionnaire about their personal and environmental characteristics. The indoor microbiome and metabolites from vacuumed indoor dust were profiled via shotgun metagenomics and untargeted liquid chromatography-mass spectrometry (LC-MS). The nasal and oral microbiota in children was characterized using full-length 16S rRNA sequencing from PacBio. Associations between personal/environmental characteristics and the nasal/oral microbiota were calculated using PERMANOVA and regression analyses. We identified 6247, 431, and 342 microbial species in the indoor dust, nasal, and oral cavities, respectively. The overall nasal and oral microbial composition showed significant associations with environmental tobacco smoke (ETS) exposure during pregnancy and early childhood (p = 0.005 and 0.03, respectively), and the abundance of total indoor flavonoids and two mycotoxins (deoxynivalenol and nivalenol) (p = 0.01, 0.02, and 0.03, respectively). Notably, the abundance of several flavonoids, such as baicalein, eupatilin, isoliquiritigenin, tangeritin, and hesperidin, showed positive correlations with alpha diversity and the abundance of protective microbial taxa in nasal and oral cavities (p < 0.02), suggesting their potential beneficial roles in promoting nasal/oral health. Conversely, high carbohydrate/fat food intake and ETS exposure diminished protective microorganisms while augmenting risky microorganisms in the nasal/oral cavities. Further, potential microbial transfer was observed from the indoor environment to the childhood oral cavity (Moraxella catarrhalis, Streptococcus mitis, and Streptococcus salivarius), which could potentially increase virulence factors related to adherence and immune modulation and vancomycin resistance genes in children. This is the first study to reveal the association between the indoor microbiome/metabolites and nasal/oral microbiota using multi-omic approaches. These findings reveal potential protective and risk factors related to the indoor microbial environment.
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Affiliation(s)
- Mei Zhang
- Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, College of Life Sciences, South China Agricultural University, Guangzhou 510642, China; (M.Z.); (Y.Y.); (Z.O.)
| | - Hao Tang
- School of Public Health, Fudan University, Shanghai 200032, China; (H.T.); (Y.X.)
| | - Yiwen Yuan
- Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, College of Life Sciences, South China Agricultural University, Guangzhou 510642, China; (M.Z.); (Y.Y.); (Z.O.)
| | - Zheyuan Ou
- Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, College of Life Sciences, South China Agricultural University, Guangzhou 510642, China; (M.Z.); (Y.Y.); (Z.O.)
| | - Zhuoru Chen
- Children’s Hospital of Fudan University, Shanghai 201102, China;
| | - Yanyi Xu
- School of Public Health, Fudan University, Shanghai 200032, China; (H.T.); (Y.X.)
| | - Xi Fu
- Guangdong Provincial Engineering Research Center of Public Health Detection and Assessment, School of Public Health, Guangdong Pharmaceutical University, Guangzhou 510006, China;
| | - Zhuohui Zhao
- School of Public Health, Fudan University, Shanghai 200032, China; (H.T.); (Y.X.)
- Key Laboratory of Public Health Safety of the Ministry of Education, NHC Key Laboratory of Health Technology Assessment (Fudan University), Shanghai Typhoon Institute/CMA, Shanghai Key Laboratory of Meteorology and Health, Shanghai 200030, China
| | - Yu Sun
- Guangdong Provincial Key Laboratory of Protein Function and Regulation in Agricultural Organisms, College of Life Sciences, South China Agricultural University, Guangzhou 510642, China; (M.Z.); (Y.Y.); (Z.O.)
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3
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Shatova OP, Shegay PV, Zabolotneva AA, Shestopalov AV, Kaprin AD. Evolutionary Acquisition of Multifunctionality by Glycolytic Enzymes. J EVOL BIOCHEM PHYS+ 2023. [DOI: 10.1134/s002209302301009x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/15/2023]
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4
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Mahajan AS, Arikatla VS, Thyagarajan A, Zhelay T, Sahu RP, Kemp MG, Spandau DF, Travers JB. Creatine and Nicotinamide Prevent Oxidant-Induced Senescence in Human Fibroblasts. Nutrients 2021; 13:4102. [PMID: 34836359 PMCID: PMC8622652 DOI: 10.3390/nu13114102] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 11/15/2021] [Accepted: 11/15/2021] [Indexed: 01/20/2023] Open
Abstract
Dermal fibroblasts provide structural support by producing collagen and other structural/support proteins beneath the epidermis. Fibroblasts also produce insulin-like growth factor-1 (IGF-1), which binds to the IGF-1 receptors (IGF-1Rs) on keratinocytes to activate signaling pathways that regulate cell proliferation and cellular responses to genotoxic stressors like ultraviolet B radiation. Our group has determined that the lack of IGF-1 expression due to fibroblast senescence in the dermis of geriatric individuals is correlated with an increased incidence of skin cancer. The present studies tested the hypothesis that pro-energetics creatine monohydrate (Cr) and nicotinamide (NAM) can protect normal dermal human fibroblasts (DHF) against experimentally induced senescence. To that end, we used an experimental model of senescence in which primary DHF are treated with hydrogen peroxide (H2O2) in vitro, with senescence measured by staining for beta-galactosidase activity, p21 protein expression, and senescence associated secretory phenotype cytokine mRNA levels. We also determined the effect of H2O2 on IGF-1 mRNA and protein expression. Our studies indicate that pretreatment with Cr or NAM protects DHF from the H2O2-induced cell senescence. Treatment with pro-energetics post-H2O2 had no effect. Moreover, these agents also inhibited reactive oxygen species generation from H2O2 treatment. These studies suggest a potential strategy for protecting fibroblasts in geriatric skin from undergoing stress-induced senescence, which may maintain IGF-1 levels and therefore limit carcinogenesis in epidermal keratinocytes.
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Affiliation(s)
- Avinash S. Mahajan
- Department of Pharmacology & Toxicology, Boonshoft School of Medicine at Wright State University, Dayton Ohio, OH 45435, USA; (A.S.M.); (V.S.A.); (A.T.); (T.Z.); (R.P.S.); (M.G.K.)
| | - Venkata S. Arikatla
- Department of Pharmacology & Toxicology, Boonshoft School of Medicine at Wright State University, Dayton Ohio, OH 45435, USA; (A.S.M.); (V.S.A.); (A.T.); (T.Z.); (R.P.S.); (M.G.K.)
| | - Anita Thyagarajan
- Department of Pharmacology & Toxicology, Boonshoft School of Medicine at Wright State University, Dayton Ohio, OH 45435, USA; (A.S.M.); (V.S.A.); (A.T.); (T.Z.); (R.P.S.); (M.G.K.)
| | - Tetyana Zhelay
- Department of Pharmacology & Toxicology, Boonshoft School of Medicine at Wright State University, Dayton Ohio, OH 45435, USA; (A.S.M.); (V.S.A.); (A.T.); (T.Z.); (R.P.S.); (M.G.K.)
| | - Ravi P. Sahu
- Department of Pharmacology & Toxicology, Boonshoft School of Medicine at Wright State University, Dayton Ohio, OH 45435, USA; (A.S.M.); (V.S.A.); (A.T.); (T.Z.); (R.P.S.); (M.G.K.)
| | - Michael G. Kemp
- Department of Pharmacology & Toxicology, Boonshoft School of Medicine at Wright State University, Dayton Ohio, OH 45435, USA; (A.S.M.); (V.S.A.); (A.T.); (T.Z.); (R.P.S.); (M.G.K.)
- Dayton Veterans Administration Medical Center, Dayton Ohio, OH 45428, USA
| | - Dan F Spandau
- Departments of Dermatology and Biochemistry & Molecular Biology, Indiana University School of Medicine, Indianapolis, IN 46223, USA;
- Richard L. Roudebush Veterans Administration Medical Center, Indianapolis, IN 46202, USA
| | - Jeffrey B. Travers
- Department of Pharmacology & Toxicology, Boonshoft School of Medicine at Wright State University, Dayton Ohio, OH 45435, USA; (A.S.M.); (V.S.A.); (A.T.); (T.Z.); (R.P.S.); (M.G.K.)
- Dayton Veterans Administration Medical Center, Dayton Ohio, OH 45428, USA
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5
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Kettenmann SD, White M, Colard-Thomas J, Kraft M, Feßler AT, Danz K, Wieland G, Wagner S, Schwarz S, Wiehe A, Kulak N. Investigating Alkylated Prodigiosenes and Their Cu(II)-Dependent Biological Activity: Interactions with DNA, Antimicrobial and Photoinduced Anticancer Activity. ChemMedChem 2021; 17:e202100702. [PMID: 34779147 PMCID: PMC9306646 DOI: 10.1002/cmdc.202100702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Indexed: 11/23/2022]
Abstract
Prodigiosenes are a family of red pigments with versatile biological activity. Their tripyrrolic core structure has been modified many times in order to manipulate the spectrum of activity. We have been looking systematically at prodigiosenes substituted at the C ring with alkyl chains of different lengths, in order to assess the relevance of this substituent in a context that has not been investigated before for these derivatives: Cu(II) complexation, DNA binding, self‐activated DNA cleavage, photoinduced cytotoxicity and antimicrobial activity. Our results indicate that the hydrophobic substituent has a clear influence on the different aspects of their biological activity. The cytotoxicity study of the Cu(II) complexes of these prodigiosenes shows that they exhibit a strong cytotoxic effect towards the tested tumor cell lines. The Cu(II) complex of a prodigiosene lacking any alkyl chain excelled in its photoinduced anticancer activity, thus demonstrating the potential of prodigiosenes and their metal complexes for an application in photodynamic therapy (PDT). Two derivatives along with their Cu(II) complexes showed also antimicrobial activity against Staphylococcus aureus strains.
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Affiliation(s)
| | - Matthew White
- Imperial College London, Department of Chemistry, UNITED KINGDOM
| | - Julien Colard-Thomas
- Ecole Nationale Superieur de Chimie de Paris: Ecole nationale superieure de chimie de Paris, Chimie, FRANCE
| | - Matilda Kraft
- Freie Universität Berlin: Freie Universitat Berlin, Institut für Chemie und Biochemie, GERMANY
| | - Andrea T Feßler
- Freie Universität Berlin: Freie Universitat Berlin, Institute for Microbiology, GERMANY
| | - Karin Danz
- Fraunhofer-Institut fur Biomedizinische Technik IBMT, Zellmodelle und Toxikologie, GERMANY
| | | | - Sylvia Wagner
- Fraunhofer-Institut fur Biomedizinische Technik IBMT, Zellmodelle und Toxikologie, GERMANY
| | - Stefan Schwarz
- Freie Universität Berlin: Freie Universitat Berlin, Institut für Mikrobiologie, GERMANY
| | | | - Nora Kulak
- Otto von Guericke Universitat Magdeburg, Institut für Chemie, Universitätsplatz 2, 39106, Magdeburg, GERMANY
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6
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Hung SW, Liang B, Gao Y, Zhang R, Tan Z, Zhang T, Chung PWJ, Chan TH, Wang CC. An In-Silico, In-Vitro and In-Vivo Combined Approach to Identify NMNATs as Potential Protein Targets of ProEGCG for Treatment of Endometriosis. Front Pharmacol 2021; 12:714790. [PMID: 34721014 PMCID: PMC8552031 DOI: 10.3389/fphar.2021.714790] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Accepted: 09/06/2021] [Indexed: 12/02/2022] Open
Abstract
Endometriosis is defined as endometrial tissues found outside the uterine cavity. ProEGCG is a prodrug of Epigallocatechin gallate (EGCG), a potent polyphenol found in green tea. It inhibits the development of endometriotic lesions of mouse model in vivo, with higher efficacy and more remarkable anti-oxidative ability than EGCG. Our study aims to identify the molecular binding targets and pharmacological actions of ProEGCG in treating endometriosis. Protein target interaction study is essential to fully characterize the mechanism of actions, related therapeutic effects, and side effects. We employed a combined approach, starting with an in silico reverse screening of protein targets and molecular docking, followed by in vitro cellular thermal shift assay (CESTA) to assess the stability of protein-small molecule complexes. Then microarray and immunostaining of endometriotic lesions in mice in vivo confirmed the molecular interaction of the selected targets after treatment. Our study identified enzymes nicotinamide nucleotide adenylyltransferase (NMNAT)1 and NMNAT3 as protein targets of ProEGCG in silico and in vitro and were overexpressed after ProEGCG treatment in vivo. These findings suggested that participation in nicotinate and nicotinamide metabolism potentially regulated the redox status of endometriosis via its antioxidative capacities through binding to the potential therapeutic targets of ProEGCG.
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Affiliation(s)
- Sze Wan Hung
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong, China
| | - Bo Liang
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong, China.,Guangdong Provincial Key Laboratory of Marine Biotechnology, Institute of Marine Sciences, Shantou University, Shantou, China
| | - Yating Gao
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong, China
| | - Ruizhe Zhang
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong, China.,Center for Reproductive Medicine, Henan Key Laboratory of Reproduction and Genetics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Zhouyurong Tan
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong, China
| | - Tao Zhang
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong, China
| | | | - Tak Hang Chan
- Department of Applied Biology and Chemical Technology, State Key Laboratory of Chemical Biology and Drug Discovery, The Hong Kong Polytechnic University, Hong Kong, China.,Department of Chemistry, McGill University, Montreal, QC, Canada
| | - Chi Chiu Wang
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong, China.,Reproduction and Development, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong, China.,School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong, China.,Chinese University of Hong Kong-Sichuan University Joint Laboratory in Reproductive Medicine, The Chinese University of Hong Kong, Hong Kong, China
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7
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Heinrich J, Bossak-Ahmad K, Riisom M, Haeri HH, Steel TR, Hergl V, Langhans A, Schattschneider C, Barrera J, Jamieson SMF, Stein M, Hinderberger D, Hartinger CG, Bal W, Kulak N. Incorporation of β-Alanine in Cu(II) ATCUN Peptide Complexes Increases ROS Levels, DNA Cleavage and Antiproliferative Activity*. Chemistry 2021; 27:18093-18102. [PMID: 34658072 PMCID: PMC9299640 DOI: 10.1002/chem.202102601] [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: 07/18/2021] [Indexed: 12/30/2022]
Abstract
Redox‐active Cu(II) complexes are able to form reactive oxygen species (ROS) in the presence of oxygen and reducing agents. Recently, Faller et al. reported that ROS generation by Cu(II) ATCUN complexes is not as high as assumed for decades. High complex stability results in silencing of the Cu(II)/Cu(I) redox cycle and therefore leads to low ROS generation. In this work, we demonstrate that an exchange of the α‐amino acid Gly with the β‐amino acid β‐Ala at position 2 (Gly2→β‐Ala2) of the ATCUN motif reinstates ROS production (•OH and H2O2). Potentiometry, cyclic voltammetry, EPR spectroscopy and DFT simulations were utilized to explain the increased ROS generation of these β‐Ala2‐containing ATCUN complexes. We also observed enhanced oxidative cleavage activity towards plasmid DNA for β‐Ala2 compared to the Gly2 complexes. Modifications with positively charged Lys residues increased the DNA affinity through electrostatic interactions as determined by UV/VIS, fluorescence, and CD spectroscopy, and consequently led to a further increase in nuclease activity. A similar trend was observed regarding the cytotoxic activity of the complexes against several human cancer cell lines where β‐Ala2 peptide complexes had lower IC50 values compared to Gly2. The higher cytotoxicity could be attributed to an increased cellular uptake as determined by ICP‐MS measurements.
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Affiliation(s)
- Julian Heinrich
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Fabeckstr. 34/36, 14195, Berlin, Germany.,Institute of Chemistry, Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106, Magdeburg, Germany
| | - Karolina Bossak-Ahmad
- Institute of Biochemistry and Biophysics, Polish Academy of Science, Pawińskiego 5a, 02-106, Warsaw, Poland
| | - Mie Riisom
- School of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand
| | - Haleh H Haeri
- Institute of Chemistry, Martin-Luther-Universität Halle-Wittenberg, Von-Danckelmann-Platz 4, 06120, Halle, Germany
| | - Tasha R Steel
- School of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand
| | - Vinja Hergl
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Fabeckstr. 34/36, 14195, Berlin, Germany
| | - Alexander Langhans
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Fabeckstr. 34/36, 14195, Berlin, Germany
| | - Corinna Schattschneider
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Fabeckstr. 34/36, 14195, Berlin, Germany
| | - Jannis Barrera
- Institute of Chemistry, Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106, Magdeburg, Germany.,Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Strasse 2, 12489, Berlin, Germany
| | - Stephen M F Jamieson
- Auckland Cancer Society Research Centre, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand
| | - Matthias Stein
- Max Planck Institute for Dynamics of Complex Technical Systems, Sandtorstrasse 1, 39106, Magdeburg, Germany
| | - Dariush Hinderberger
- Institute of Chemistry, Martin-Luther-Universität Halle-Wittenberg, Von-Danckelmann-Platz 4, 06120, Halle, Germany
| | - Christian G Hartinger
- School of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand
| | - Wojciech Bal
- Institute of Biochemistry and Biophysics, Polish Academy of Science, Pawińskiego 5a, 02-106, Warsaw, Poland
| | - Nora Kulak
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Fabeckstr. 34/36, 14195, Berlin, Germany.,Institute of Chemistry, Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106, Magdeburg, Germany
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8
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Flexible vs. rigid bis(2-benzimidazolyl) ligands in Cu(II) complexes: Impact on redox chemistry and oxidative DNA cleavage activity. J Inorg Biochem 2019; 194:223-232. [DOI: 10.1016/j.jinorgbio.2019.01.016] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 01/27/2019] [Accepted: 01/27/2019] [Indexed: 11/21/2022]
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9
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Cu(II) complexes with hydrazone-functionalized phenanthrolines as self-activating metallonucleases. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2017.11.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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10
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Hassan RM, Ibrahim SM, Khairou KS. Kinetics and mechanism of oxidation of pyruvate by permanganate ion in aqueous perchlorate solution. TRANSIT METAL CHEM 2018. [DOI: 10.1007/s11243-018-0257-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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11
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Neuroprotective Effect of Creatine and Pyruvate on Enzyme Activities of Phosphoryl Transfer Network and Oxidative Stress Alterations Caused by Leucine Administration in Wistar Rats. Neurotox Res 2017; 32:575-584. [DOI: 10.1007/s12640-017-9762-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Revised: 05/22/2017] [Accepted: 05/26/2017] [Indexed: 01/25/2023]
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12
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13
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Respiratory chain inhibition: one more feature to propose MPTP intoxication as a Leigh syndrome model. J Bioenerg Biomembr 2016; 48:483-491. [PMID: 27787743 DOI: 10.1007/s10863-016-9683-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Accepted: 10/14/2016] [Indexed: 01/30/2023]
Abstract
1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) intoxicated mice have been widely used to model the loss of dopaminergic neurons. As this treatment leads to basal ganglia degeneration, it was proposed that MPTP mice could be used as a model of Leigh syndrome. However, this mitochondrial pathology is biochemically characterized by a respiratory chain dysfunction. To determine if MPTP can affect in vivo mitochondria function, we measured the activities of mitochondrial respiratory chain complexes in several tissues. Our results show that MPTP affects mainly mitochondrial respiratory chain complex IV, as found in Leigh Syndrome, confirming that acute MPTP intoxicated mice are a good model of Leigh Syndrome.
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14
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Scheer M, Bischoff AM, Kruzliak P, Opatrilova R, Bovell D, Büsselberg D. Creatine and creatine pyruvate reduce hypoxia-induced effects on phrenic nerve activity in the juvenile mouse respiratory system. Exp Mol Pathol 2016; 101:157-62. [PMID: 27450651 DOI: 10.1016/j.yexmp.2016.07.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Revised: 05/29/2016] [Accepted: 07/19/2016] [Indexed: 12/12/2022]
Abstract
Adequate concentrations of ATP are required to preserve physiological cell functions and protect tissue from hypoxic damage. Decreased oxygen concentration results in ATP synthesis relying increasingly on the presence of phosphocreatine. The lack of ATP through hypoxic insult to neurons that generate or regulate respiratory function, would lead to the cessation of breathing (apnea). It is not clear whether creatine plays a role in maintaining respiratory phrenic nerve (PN) activity during hypoxic challenge. The aim of the study was to test the effects of exogenously applied creatine or creatine pyruvate in maintaining PN induced respiratory rhythm against the deleterious effects of severe hypoxic insult using Working Heart-Brainstem (WHB) preparations of juvenile Swiss type mice. WHB's were perfused with control perfusate or perfusate containing either creatine [100μM] or creatine pyruvate [100μM] prior to hypoxic challenge and PN activity recorded throughout. Results showed that severe hypoxic challenge resulted in an initial transient increase in PN activity, followed by a reduction in that activity leading to respiratory apnea. The results demonstrated that perfusing the WHB preparation with creatine or creatine pyruvate, significantly reduced the onset of apnea compared to control conditions, with creatine pyruvate being the more effective substance. Overall, creatine and creatine pyruvate each produced time-dependent degrees of protection against severe hypoxic-induced disturbances of PN activity. The underlying protective mechanisms are unknown and need further investigations.
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Affiliation(s)
- Monika Scheer
- Onkologie, Hämatologie, Immunologie, Klinikum Stuttgart Olgahospital, Stuttgart, Germany
| | - Anna M Bischoff
- Georg-August-Universität Göttingen, Abteilung für Neuro- und Sinnesphysiologie, Göttingen, Germany
| | - Peter Kruzliak
- Department of Chemical Drugs, Faculty of Pharmacy, University of Veterinary and Pharmaceutical Sciences, Brno, Czech Republic.
| | - Radka Opatrilova
- Department of Chemical Drugs, Faculty of Pharmacy, University of Veterinary and Pharmaceutical Sciences, Brno, Czech Republic
| | - Douglas Bovell
- Weill Cornell Medicine in Qatar, Qatar Foundation-Education City, Doha, Qatar
| | - Dietrich Büsselberg
- Weill Cornell Medicine in Qatar, Qatar Foundation-Education City, Doha, Qatar.
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15
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de Andrade RB, Gemelli T, Rojas DB, Kim TDH, Zanatta Â, Schmitz F, Rodrigues AF, Wyse ATS, Wajner M, Dutra-Filho CS, Wannmacher CMD. Evaluation of Oxidative Stress Parameters and Energy Metabolism in Cerebral Cortex of Rats Subjected to Sarcosine Administration. Mol Neurobiol 2016; 54:4496-4506. [PMID: 27356917 DOI: 10.1007/s12035-016-9984-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Accepted: 06/14/2016] [Indexed: 10/21/2022]
Abstract
Sarcosine is an N-methyl derivative of the amino acid glycine, and its elevation in tissues and physiological fluids of patients with sarcosinemia could reflect a deficient pool size of activated 1-carbon units. Sarcosinemia is a rare inherited metabolic condition associated with mental retardation. In the present study, we investigated the acute effect of sarcosine and/or creatine plus pyruvate on some parameters of oxidative stress and energy metabolism in cerebral cortex homogenates of 21-day-old Wistar rats. Acute administration of sarcosine induced oxidative stress and diminished the activities of adenylate kinase, GAPDH, complex IV, and mitochondrial and cytosolic creatine kinase. On the other hand, succinate dehydrogenase activity was enhanced in cerebral cortex of rats. Moreover, total sulfhydryl content was significantly diminished, while DCFH oxidation, TBARS content, and activities of SOD and GPx were significantly enhanced by acute administration of sarcosine. Co-administration of creatine plus pyruvate was effective in the prevention of alterations provoked by sarcosine administration on the oxidative stress and the enzymes of phosphoryltransfer network. These results indicate that acute administration of sarcosine may stimulate oxidative stress and alter the energy metabolism in cerebral cortex of rats. In case these effects also occur in humans, they may contribute, along with other mechanisms, to the neurological dysfunction of sarcosinemia, and creatine and pyruvate supplementation could be beneficial to the patients.
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Affiliation(s)
- Rodrigo Binkowski de Andrade
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, UFRGS, Rua Ramiro Barcelos 2600, CEP 90.035-003, Porto Alegre, RS, Brazil. .,Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos 2600-Anexo, CEP 90.035-003, Porto Alegre, RS, Brazil. .,Faculdade da Serra Gaúcha, FSG, Rua Rua Os Dezoito do Forte, 2366, CEP 95.020-472, Caxias do Sul, RS, Brazil.
| | - Tanise Gemelli
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, UFRGS, Rua Ramiro Barcelos 2600, CEP 90.035-003, Porto Alegre, RS, Brazil
| | - Denise Bertin Rojas
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, UFRGS, Rua Ramiro Barcelos 2600, CEP 90.035-003, Porto Alegre, RS, Brazil
| | - Tomas Duk Hwa Kim
- Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos 2600-Anexo, CEP 90.035-003, Porto Alegre, RS, Brazil
| | - Ângela Zanatta
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, UFRGS, Rua Ramiro Barcelos 2600, CEP 90.035-003, Porto Alegre, RS, Brazil
| | - Felipe Schmitz
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, UFRGS, Rua Ramiro Barcelos 2600, CEP 90.035-003, Porto Alegre, RS, Brazil
| | - André Felipe Rodrigues
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, UFRGS, Rua Ramiro Barcelos 2600, CEP 90.035-003, Porto Alegre, RS, Brazil
| | - Angela T S Wyse
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, UFRGS, Rua Ramiro Barcelos 2600, CEP 90.035-003, Porto Alegre, RS, Brazil.,Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos 2600-Anexo, CEP 90.035-003, Porto Alegre, RS, Brazil
| | - Moacir Wajner
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, UFRGS, Rua Ramiro Barcelos 2600, CEP 90.035-003, Porto Alegre, RS, Brazil.,Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos 2600-Anexo, CEP 90.035-003, Porto Alegre, RS, Brazil
| | - Carlos Severo Dutra-Filho
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, UFRGS, Rua Ramiro Barcelos 2600, CEP 90.035-003, Porto Alegre, RS, Brazil.,Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos 2600-Anexo, CEP 90.035-003, Porto Alegre, RS, Brazil
| | - Clovis Milton Duval Wannmacher
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, UFRGS, Rua Ramiro Barcelos 2600, CEP 90.035-003, Porto Alegre, RS, Brazil.,Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos 2600-Anexo, CEP 90.035-003, Porto Alegre, RS, Brazil
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16
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Cao W, Hong Y, Chen H, Wu F, Wei X, Ying W. SIRT2 mediates NADH-induced increases in Nrf2, GCL, and glutathione by modulating Akt phosphorylation in PC12 cells. FEBS Lett 2016; 590:2241-55. [PMID: 27264719 DOI: 10.1002/1873-3468.12236] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Revised: 05/27/2016] [Accepted: 05/30/2016] [Indexed: 01/26/2023]
Abstract
SIRT2 plays important roles in multiple biological processes. It is unclear whether SIRT2 affects antioxidant capacity by modulating Nrf2, a key transcription factor for multiple antioxidant genes. By studying NADH-treated differentiated PC12 cells, we found that NADH induced a significant increase in the nuclear Nrf2, which was prevented by both SIRT2 siRNA and SIRT2 inhibitor, AGK2. SIRT2 siRNA also blocked the NADH-induced increases in glutamate cysteine ligase (GCL) and glutathione. Moreover, SIRT2 siRNA and AGK2 blocked NADH-induced Akt phosphorylation, and inhibition of Akt phosphorylation prevented NADH-induced increases in the nuclear Nrf2 and glutathione. Collectively, our study shows that SIRT2 regulates nuclear Nrf2 levels by modulating Akt phosphorylation, thus modulating the levels of GCL and total glutathione.
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Affiliation(s)
- Wei Cao
- Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, China
| | - Yunyi Hong
- Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, China
| | - Heyu Chen
- Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, China
| | - Fan Wu
- School of Naval Architecture, Ocean & Civil Engineering, Shanghai Jiao Tong University, China
| | - Xunbin Wei
- Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, China
| | - Weihai Ying
- Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, China.,Department of Neurology, School of Medicine, Ruijin Hospital, Shanghai Jiao Tong University, China
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17
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Bisri T, Utomo BA, Fuadi I. Exogenous lactate infusion improved neurocognitive function of patients with mild traumatic brain injury. Asian J Neurosurg 2016; 11:151-9. [PMID: 27057222 PMCID: PMC4802937 DOI: 10.4103/1793-5482.145375] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND Many studies showed a better recovery of cognitive function after administration of exogenous lactate during moderate-severe traumatic brain injury. However, the study evaluating lactate effect on mild traumatic brain injury is still limited. AIMS To evaluate the effect of exogenous lactate on cognitive function in mild traumatic brain injury patients. SETTINGS AND DESIGN Prospective, single blind, randomized controlled study on 60 mild traumatic brain injury patients who were undergoing neurosurgery. MATERIALS AND METHODS Subjects were randomly assigned into hyperosmolar sodium lactate (HSL) group or hyperosmolar sodium chloride (HSS) group. Patients in each group received either intravenous infusion of HSL or NaCl 3% at 1.5 ml/KgBW within 15 min before neurosurgery. During the surgery, patients in both groups received maintenance infusion of NaCl 0.9% at 1.5 ml/KgBW/hour. STATISTICAL ANALYSIS Cognitive function, as assessed by Mini-Mental State Examination (MMSE) score at 24 h, 30 and 90 days post-surgery, was analyzed by Anova repeated measures test. RESULTS The MMSE score improvement was significantly better in HSL group than HSS group (P < 0.001). In HSL group the MMSE score improved from 16.00 (13.75-18.00) at baseline to 21.00 (18.75-22.00); 25.00 (23.75-26.00); 28.00 (27.00-29.00) at 24 h, 30, 90 days post-surgery, respectively. In contrast, in HSS group the MMSE score almost unchanged at 24 h and only slightly increased at 30 and 90 days post-surgery. CONCLUSIONS Hyperosmolar sodium lactate infusion during mild traumatic brain injury improved cognitive function better than sodium chloride 3%.
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Affiliation(s)
- Tatang Bisri
- Department of Anesthesiology and Intensive Care, Faculty of Medicine, Universitas Padjadjaran, Hasan Sadikin Hospital, Bandung, Indonesia
| | - Billy A. Utomo
- Department of Anesthesiology and Intensive Care, Faculty of Medicine, Universitas Padjadjaran, Hasan Sadikin Hospital, Bandung, Indonesia
| | - Iwan Fuadi
- Department of Anesthesiology and Intensive Care, Faculty of Medicine, Universitas Padjadjaran, Hasan Sadikin Hospital, Bandung, Indonesia
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18
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Zhang B, Zhou J, Li S, Zhang X, Huang D, He Y, Wang M, Yang G, Shen Y. Hydrogen peroxide biosensor based on microperoxidase-11 immobilized on flexible MWCNTs-BC nanocomposite film. Talanta 2015; 131:243-8. [DOI: 10.1016/j.talanta.2014.07.027] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Revised: 07/08/2014] [Accepted: 07/10/2014] [Indexed: 11/16/2022]
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19
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de Andrade RB, Gemelli T, Rojas DB, Bonorino NF, Costa BML, Funchal C, Dutra-Filho CS, Wannmacher CMD. Creatine and Pyruvate Prevent the Alterations Caused by Tyrosine on Parameters of Oxidative Stress and Enzyme Activities of Phosphoryltransfer Network in Cerebral Cortex of Wistar Rats. Mol Neurobiol 2014; 51:1184-94. [DOI: 10.1007/s12035-014-8791-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Accepted: 06/15/2014] [Indexed: 12/01/2022]
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20
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Nguyen AQ, Cherry BH, Scott GF, Ryou MG, Mallet RT. Erythropoietin: powerful protection of ischemic and post-ischemic brain. Exp Biol Med (Maywood) 2014; 239:1461-75. [PMID: 24595981 DOI: 10.1177/1535370214523703] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Ischemic brain injury inflicted by stroke and cardiac arrest ranks among the leading causes of death and long-term disability in the United States. The brain consumes large amounts of metabolic substrates and oxygen to sustain its energy requirements. Consequently, the brain is exquisitely sensitive to interruptions in its blood supply, and suffers irreversible damage after 10-15 min of severe ischemia. Effective treatments to protect the brain from stroke and cardiac arrest have proven elusive, due to the complexities of the injury cascades ignited by ischemia and reperfusion. Although recombinant tissue plasminogen activator and therapeutic hypothermia have proven efficacious for stroke and cardiac arrest, respectively, these treatments are constrained by narrow therapeutic windows, potentially detrimental side-effects and the limited availability of hypothermia equipment. Mounting evidence demonstrates the cytokine hormone erythropoietin (EPO) to be a powerful neuroprotective agent and a potential adjuvant to established therapies. Classically, EPO originating primarily in the kidneys promotes erythrocyte production by suppressing apoptosis of proerythroid progenitors in bone marrow. However, the brain is capable of producing EPO, and EPO's membrane receptors and signaling components also are expressed in neurons and astrocytes. EPO activates signaling cascades that increase the brain's resistance to ischemia-reperfusion stress by stabilizing mitochondrial membranes, limiting formation of reactive oxygen and nitrogen intermediates, and suppressing pro-inflammatory cytokine production and neutrophil infiltration. Collectively, these mechanisms preserve functional brain tissue and, thus, improve neurocognitive recovery from brain ischemia. This article reviews the mechanisms mediating EPO-induced brain protection, critiques the clinical utility of exogenous EPO to preserve brain threatened by ischemic stroke and cardiac arrest, and discusses the prospects for induction of EPO production within the brain by the intermediary metabolite, pyruvate.
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Affiliation(s)
- Anh Q Nguyen
- Department of Integrative Physiology and Cardiovascular Research Institute, University of North Texas Health Science Center, Fort Worth, TX 76107-2699
| | - Brandon H Cherry
- Department of Integrative Physiology and Cardiovascular Research Institute, University of North Texas Health Science Center, Fort Worth, TX 76107-2699
| | - Gary F Scott
- Department of Integrative Physiology and Cardiovascular Research Institute, University of North Texas Health Science Center, Fort Worth, TX 76107-2699
| | - Myoung-Gwi Ryou
- Department of Integrative Physiology and Cardiovascular Research Institute, University of North Texas Health Science Center, Fort Worth, TX 76107-2699
| | - Robert T Mallet
- Department of Integrative Physiology and Cardiovascular Research Institute, University of North Texas Health Science Center, Fort Worth, TX 76107-2699
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21
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Lemire J, Auger C, Mailloux R, Appanna VD. Mitochondrial lactate metabolism is involved in antioxidative defense in human astrocytoma cells. J Neurosci Res 2014; 92:464-75. [PMID: 24452607 DOI: 10.1002/jnr.23338] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2013] [Revised: 10/28/2013] [Accepted: 11/04/2013] [Indexed: 12/24/2022]
Abstract
Although lactate has traditionally been known to be an end product of anaerobic metabolism, recent studies have revealed its disparate biological functions. Oxidative energy production and cell signaling are two important roles assigned to this monocarboxylic acid. Here we demonstrate that mitochondrial lactate metabolism to pyruvate mediated by lactate dehydrogenase (LDH) in a human astrocytic cell line is involved in antioxidative defense. The pooling of this α-ketoacid helps to detoxify reactive oxygen species, with the concomitant formation of acetate. In-gel activity assays following blue native PAGE electrophoresis were utilized to demonstrate the increase in mitochondrial LDH activity coupled to the decrease in pyruvate dehydrogenase activity in the cells challenged by oxidative stress. The enhanced production of pyruvate with the concomitant formation of acetate in astrocytoma cells was monitored by high-performance liquid chromatography. The ability of pyruvate to fend off oxidative stress was visualized by fluorescence microscopy with the aid of the dye 2',7'-dichlorodihydrofluorescein diacetate. Immunoblotting helped confirm the presence of elevated levels of LDH in cells exposed to oxidative stress, and recovery experiments were performed with pyruvate to diminish the oxidative burden on the astrocytoma. The acetate, generated as a consequence of the antioxidative attribute of pyruvate, was subsequently channeled toward the production of lipids, a process facilitated by the upregulation in activity of acetyl-CoA synthetase and acetyl-CoA carboxylase, as demonstrated by in-gel activity assays. The mitochondrial lactate metabolism mediated by LDH appears to play an important role in antioxidative defence in this astrocytic system.
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Affiliation(s)
- Joseph Lemire
- Department of Chemistry and Biochemistry, Laurentian University, Sudbury, Ontario, Canada
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22
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Prabhu P, Singh BG, Noguchi M, Phadnis PP, Jain VK, Iwaoka M, Priyadarsini KI. Stable selones in glutathione-peroxidase-like catalytic cycle of selenonicotinamide derivative. Org Biomol Chem 2014; 12:2404-12. [DOI: 10.1039/c3ob42336k] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Stable selone formation in 2,2′-diselenobis[3-amidopyridine], reduces unwanted sulfur exchange reaction in glutathione peroxidase like catalytic cycle and enhances its enzyme activity.
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Affiliation(s)
- Parashiva Prabhu
- Chemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400 085, India
| | - Beena G. Singh
- Radiation & Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai – 400 085, India
| | - Masato Noguchi
- Department of Chemistry
- School of Science
- Tokai University
- Kanagawa 259-1292, Japan
| | - Prasad P. Phadnis
- Chemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400 085, India
| | - Vimal K. Jain
- Chemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400 085, India
| | - Michio Iwaoka
- Department of Chemistry
- School of Science
- Tokai University
- Kanagawa 259-1292, Japan
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23
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Parashiva Prabhu C, Phadnis PP, Wadawale AP, Indira Priyadarsini K, Jain VK. Synthesis, characterization, structures and antioxidant activity of nicotinoyl based organoselenium compounds. J Organomet Chem 2012. [DOI: 10.1016/j.jorganchem.2012.04.014] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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24
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Andrade VS, Rojas DB, Oliveira L, Nunes ML, de Castro FL, Garcia C, Gemelli T, de Andrade RB, Wannmacher CMD. Creatine and pyruvate prevent behavioral and oxidative stress alterations caused by hypertryptophanemia in rats. Mol Cell Biochem 2011; 362:225-32. [PMID: 22081291 DOI: 10.1007/s11010-011-1147-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2011] [Accepted: 11/03/2011] [Indexed: 11/24/2022]
Abstract
It is known that the accumulation of tryptophan and its metabolites is related to brain damage associated with both hypertryptophanemia and neurodegenerative diseases. In this study, we investigated the effect of tryptophan administration on various parameters of behavior in the open-field task and oxidative stress, and the effects of creatine and pyruvate, on the effect of tryptophan. Forty, 60-day-old male Wistar rats, were randomly divided into four groups: saline, tryptophan, pyruvate + creatine, tryptophan + pyruvate + creatine. Animals received three subcutaneous injections of tryptophan (2 μmol/g body weight each one at 3 h of intervals) and/or pyruvate (200 μg/g body weight 1 h before tryptophan), and/or creatine (400 μg/g body weight twice a day for 5 days before tryptophan twice a day for 5 days before training); controls received saline solution (NaCl 0.85%) at the same volumes (30 μl/g body weight) than the other substances. Results showed that tryptophan increased the activity of the animals, suggesting a reduction in the ability of habituation to the environment. Tryptophan induced increase of TBA-RS and total sulfhydryls. The effects of tryptophan in the open field, and in oxidative stress were fully prevented by the combination of creatine plus pyruvate. In case these findings also occur in humans affected by hypertryptophanemia or other neurodegenerative disease in which tryptophan accumulates, it is feasible that oxidative stress may be involved in the mechanisms leading to the brain injury, suggesting that creatine and pyruvate supplementation could benefit patients affected by these disorders.
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Metabolomics of oxidative stress in recent studies of endogenous and exogenously administered intermediate metabolites. Int J Mol Sci 2011; 12:6469-501. [PMID: 22072900 PMCID: PMC3210991 DOI: 10.3390/ijms12106469] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2011] [Revised: 09/13/2011] [Accepted: 09/21/2011] [Indexed: 11/19/2022] Open
Abstract
Aerobic metabolism occurs in a background of oxygen radicals and reactive oxygen species (ROS) that originate from the incomplete reduction of molecular oxygen in electron transfer reactions. The essential role of aerobic metabolism, the generation and consumption of ATP and other high energy phosphates, sustains a balance of approximately 3000 essential human metabolites that serve not only as nutrients, but also as antioxidants, neurotransmitters, osmolytes, and participants in ligand-based and other cellular signaling. In hypoxia, ischemia, and oxidative stress, where pathological circumstances cause oxygen radicals to form at a rate greater than is possible for their consumption, changes in the composition of metabolite ensembles, or metabolomes, can be associated with physiological changes. Metabolomics and metabonomics are a scientific disciplines that focuse on quantifying dynamic metabolome responses, using multivariate analytical approaches derived from methods within genomics, a discipline that consolidated innovative analysis techniques for situations where the number of biomarkers (metabolites in our case) greatly exceeds the number of subjects. This review focuses on the behavior of cytosolic, mitochondrial, and redox metabolites in ameliorating or exacerbating oxidative stress. After reviewing work regarding a small number of metabolites—pyruvate, ethyl pyruvate, and fructose-1,6-bisphosphate—whose exogenous administration was found to ameliorate oxidative stress, a subsequent section reviews basic multivariate statistical methods common in metabolomics research, and their application in human and preclinical studies emphasizing oxidative stress. Particular attention is paid to new NMR spectroscopy methods in metabolomics and metabonomics. Because complex relationships connect oxidative stress to so many physiological processes, studies from different disciplines were reviewed. All, however, shared the common goal of ultimately developing “omics”-based, diagnostic tests to help influence therapies.
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26
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Mazzio EA, Close F, Soliman KFA. The biochemical and cellular basis for nutraceutical strategies to attenuate neurodegeneration in Parkinson's disease. Int J Mol Sci 2011; 12:506-69. [PMID: 21340000 PMCID: PMC3039966 DOI: 10.3390/ijms12010506] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2010] [Revised: 01/05/2011] [Accepted: 01/14/2011] [Indexed: 12/19/2022] Open
Abstract
Future therapeutic intervention that could effectively decelerate the rate of degeneration within the substantia nigra pars compacta (SNc) could add years of mobility and reduce morbidity associated with Parkinson’s disease (PD). Neurodegenerative decline associated with PD is distinguished by extensive damage to SNc dopaminergic (DAergic) neurons and decay of the striatal tract. While genetic mutations or environmental toxins can precipitate pathology, progressive degenerative succession involves a gradual decline in DA neurotransmission/synaptic uptake, impaired oxidative glucose consumption, a rise in striatal lactate and chronic inflammation. Nutraceuticals play a fundamental role in energy metabolism and signaling transduction pathways that control neurotransmission and inflammation. However, the use of nutritional supplements to slow the progression of PD has met with considerable challenge and has thus far proven unsuccessful. This review re-examines precipitating factors and insults involved in PD and how nutraceuticals can affect each of these biological targets. Discussed are disease dynamics (Sections 1 and 2) and natural substances, vitamins and minerals that could impact disease processes (Section 3). Topics include nutritional influences on α-synuclein aggregation, ubiquitin proteasome function, mTOR signaling/lysosomal-autophagy, energy failure, faulty catecholamine trafficking, DA oxidation, synthesis of toxic DA-quinones, o-semiquinones, benzothiazolines, hyperhomocyseinemia, methylation, inflammation and irreversible oxidation of neuromelanin. In summary, it is clear that future research will be required to consider the multi-faceted nature of this disease and re-examine how and why the use of nutritional multi-vitamin-mineral and plant-based combinations could be used to slow the progression of PD, if possible.
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Affiliation(s)
- Elizabeth A Mazzio
- Florida A&M University, College of Pharmacy and Pharmaceutical Sciences, Tallahassee, FL 32307, USA; E-Mails: (E.A.M.); (F.C.)
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27
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Roudier E, Perrin A. Considering the role of pyruvate in tumor cells during hypoxia. Biochim Biophys Acta Rev Cancer 2009; 1796:55-62. [PMID: 19268693 DOI: 10.1016/j.bbcan.2009.02.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2008] [Revised: 02/19/2009] [Accepted: 02/21/2009] [Indexed: 12/22/2022]
Abstract
Impairment of oxygen supply occurs in many pathological situations. In the case of cancer, both chronic and acute hypoxic areas are found in the tumor. Tumor hypoxia is associated with poor clinical prognoses and is correlated with tumor growth and metastasis development. Pyruvate is a common metabolite, as it is an end-product of glycolysis and an energy substrate for the mitochondrial Krebs cycle. It is also well known for its protective properties against stressful conditions, particularly hypoxia. Its presence determines cellular fate when there is a lack of oxygen. Interestingly, pyruvate metabolism is altered during cancer development. For years, this was assumed to be a consequence of malignant transformation. However, it now is becoming clear that pyruvate could contribute to cancer progression. The role of pyruvate during hypoxia has been widely studied in non-tumor tissues and cells; it is less documented whether or not the protective effect of pyruvate could also take place in cancer cells. If so, pyruvate might be deleterious for cancer patients. The present paper reviews data that highlight the role of pyruvate in cancer cells and tumors during hypoxic stress.
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Affiliation(s)
- Emilie Roudier
- York University, Faculty of Health, Muscle Health Research Institute - MHRC, Farquharson Life Science Building, Toronto, ON, Canada M3J 1P3.
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28
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Glucose metabolism is accelerated by exposure to t-butylhydroperoxide during NADH consumption in human erythrocytes. Blood Cells Mol Dis 2008; 41:237-43. [PMID: 18706836 DOI: 10.1016/j.bcmd.2008.05.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2008] [Revised: 05/20/2008] [Accepted: 05/29/2008] [Indexed: 11/21/2022]
Abstract
Several mechanisms have been proposed to underlie the events that occur during oxidative damage in red blood cells (RBCs) exposed to reactive oxygen species. This work explores what happens when metabolites related to redox regulation in human RBCs are oxidized to form alkoxyl radical and peroxyl radical as a result of exposure to tert-buthylhydroperoxide (BHP). During exposure to BHP, the glutathione level and the ratio of NADPH to total nicotinamide adenine dinucleotide phosphate (NADPH plus NADP(+)) were significantly decreased. Although alteration in the concentration of monosaccharides metabolized in the pentose phosphate pathway (PPP) was not observed, exposing RBCs to BHP caused the formation of methemoglobin (metHb) and a significant decrease in NADH. Moreover, we detected a significant increase in one of the peaks during BHP exposure by using HPLC with dansyl hydrazine as a prelabel reagent. A complete enzymatic conversion procedure was used to identify the peak as pyruvate based on comparison with standards. These results suggest that the rapid recovery in the level of glutathione and the formation of metHb by BHP require NADPH and NADH consumption. Subsequently, glucose metabolism accelerates to reproduce NADPH and NADH, which results in pyruvate accumulation. Our findings indicate that the level of pyruvate markedly increases upon exposure to a radical-generating oxidant capable of forming metHb. Methemoglobin reductase requires NADH as a co-factor, and oxidized form (NHADP(+)) is reduced via the glycolytic reaction catalyzed by glyceraldehyde 3-phosphate dehydrogenase. Thus, the overall acceleration of glycolysis induced by BHP is strongly dependent on the NADH reproducing pathway. In addition, the decrease in NADH enhances the increase in pyruvate by inhibiting the conversion of pyruvate to lactate in the presence of lactate dehydrogenase.
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Liu J, Hirai K, Litt L. Fructose-1,6-bisphosphate does not preserve ATP in hypoxic-ischemic neonatal cerebrocortical slices. Brain Res 2008; 1238:230-8. [PMID: 18725216 DOI: 10.1016/j.brainres.2008.08.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2008] [Revised: 08/02/2008] [Accepted: 08/04/2008] [Indexed: 11/17/2022]
Abstract
Fructose-1,6-bisphosphate (FBP), an endogenous intracellular metabolite in glycolysis, was found in many preclinical studies to be neuroprotective during hypoxia-ischemia (HI) when administered exogenously. We looked for HI neuroprotection from FBP in a neonatal rat brain slice model, using 14.1 T (1)H/(31)P/(13)C NMR spectroscopy of perchloric acid slice extracts to ask: 1) if FBP preserves high energy phosphates during HI; and 2) if exogenous [1-(13)C]FBP enters cells and is glycolytically metabolized to [3-(13)C]lactate. We also asked: 3) if substantial superoxide production occurs during and after HI, thinking such might be treatable by exogenous FBP's antioxidant effects. Superfused P7 rat cerebrocortical slices (350 mum) were treated with 2 mM FBP before and during 30 min of HI, and then given 4 h of recovery with an FBP-free oxygenated superfusate. Slices were removed before HI, at the end of HI, and at 1 and 4 h after HI. FBP did not improve high energy phosphate levels or change (1)H metabolite profiles. Large increases in [3-(13)C]lactate were seen with (13)C NMR, but the lactate fractional enrichment was always (1.1+/-0.5)%, implying that all of lactate's (13)C was natural abundance (13)C, that none was from metabolism of (13)C-FBP. FBP had no effect on the fluorescence of ethidium produced from superoxide oxidation of hydroethidine. Compared to control slices, ethidium fluorescence was 25% higher during HI and 50% higher at the end of recovery. Exogenous FBP did not provide protection or enter glycolysis. Its use as an antioxidant might be worth studying at higher FBP concentrations.
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Affiliation(s)
- Jia Liu
- Department of Anesthesia and Perioperative Medicine, The University of California San Francisco, San Francisco, CA 94143, USA
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Press C, Milbrandt J. Nmnat delays axonal degeneration caused by mitochondrial and oxidative stress. J Neurosci 2008; 28:4861-71. [PMID: 18463239 PMCID: PMC2678678 DOI: 10.1523/jneurosci.0525-08.2008] [Citation(s) in RCA: 126] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2007] [Revised: 03/13/2008] [Accepted: 03/26/2008] [Indexed: 12/15/2022] Open
Abstract
Axonal degeneration is a prominent feature of many neurological disorders that are associated with mitochondrial dysfunction, including Parkinson's disease, motor neuron disease, and inherited peripheral neuropathies. Studies of the Wld(s) mutant mouse, which undergoes delayed Wallerian degeneration in response to axonal injury, suggest that axonal degeneration is an active process. Wld(s) mice also have slower axonal degeneration and disease progression in numerous models of neurodegenerative disease. The Wld(s) mutation results in the production of a chimeric protein that contains the full-length coding sequence of nicotinamide mononucleotide adenylyltransferase 1 (Nmnat1), which alone is sufficient for axonal protection in vitro. To test the effects of increased Nmnat expression on axonal degeneration induced by mitochondrial dysfunction, we examined dorsal root ganglion (DRG) neurons treated with rotenone. Rotenone induced profound axonal degeneration in DRG neurons; however, this degeneration was delayed by expression of Nmnat. Nmnat-mediated protection resulted in decreased axonal accumulation and sensitivity to reactive oxygen species (ROS) but did not affect the change in the rate of rotenone-induced loss in neuronal ATP. Nmnat also prevented axonal degeneration caused by exposure to exogenous oxidants and reduced the level of axonal ROS after treatment with vincristine, further supporting the idea that Nmnat promotes axonal protection by mitigating the effects of ROS.
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Affiliation(s)
- Craig Press
- Department of Pathology, Hope Center for Neurological Disorders, Washington University School of Medicine, St. Louis, Missouri 63110
| | - Jeffrey Milbrandt
- Department of Pathology, Hope Center for Neurological Disorders, Washington University School of Medicine, St. Louis, Missouri 63110
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Ying W. NAD+/NADH and NADP+/NADPH in cellular functions and cell death: regulation and biological consequences. Antioxid Redox Signal 2008; 10:179-206. [PMID: 18020963 DOI: 10.1089/ars.2007.1672] [Citation(s) in RCA: 1047] [Impact Index Per Article: 65.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Accumulating evidence has suggested that NAD (including NAD+ and NADH) and NADP (including NADP+ and NADPH) could belong to the fundamental common mediators of various biological processes, including energy metabolism, mitochondrial functions, calcium homeostasis, antioxidation/generation of oxidative stress, gene expression, immunological functions, aging, and cell death: First, it is established that NAD mediates energy metabolism and mitochondrial functions; second, NADPH is a key component in cellular antioxidation systems; and NADH-dependent reactive oxygen species (ROS) generation from mitochondria and NADPH oxidase-dependent ROS generation are two critical mechanisms of ROS generation; third, cyclic ADP-ribose and several other molecules that are generated from NAD and NADP could mediate calcium homeostasis; fourth, NAD and NADP modulate multiple key factors in cell death, such as mitochondrial permeability transition, energy state, poly(ADP-ribose) polymerase-1, and apoptosis-inducing factor; and fifth, NAD and NADP profoundly affect aging-influencing factors such as oxidative stress and mitochondrial activities, and NAD-dependent sirtuins also mediate the aging process. Moreover, many recent studies have suggested novel paradigms of NAD and NADP metabolism. Future investigation into the metabolism and biological functions of NAD and NADP may expose fundamental properties of life, and suggest new strategies for treating diseases and slowing the aging process.
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Affiliation(s)
- Weihai Ying
- Department of Neurology, University of California at San Francisco, San Francisco, California 94121, USA.
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After Four Hours of Cold Ischemia and Cardioplegic Protocol, the Heart Can Still Be Rescued With Postconditioning. Transplantation 2007; 84:1474-82. [DOI: 10.1097/01.tp.0000288637.18796.0e] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Park JH, Hong YH, Kim HJ, Kim SM, Kim MJ, Park KS, Sung JJ, Lee KW. Pyruvate slows disease progression in a G93A SOD1 mutant transgenic mouse model. Neurosci Lett 2007; 413:265-9. [PMID: 17174029 DOI: 10.1016/j.neulet.2006.11.058] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2006] [Revised: 11/30/2006] [Accepted: 11/30/2006] [Indexed: 10/23/2022]
Abstract
Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disease caused by selective motor neuron death, and currently no effective treatment is available for ALS. In this study, we investigated the neuroprotective effects of pyruvate, which acts as an anti-oxidant and as an energy source. We treated G93A SOD1 transgenic mice with pyruvate (from 70 days of age, i.p., at 1000 mg/kg/week), and found that it prolonged average lifespan by 12.3 days (10.5%), slowed disease progression, and improved motor performance, but did not delay disease onset. Pyruvate treatment was also associated with reduced nitrotyrosine immunoreactivity, gliosis, and increased Bcl-2 expression in the spinal cords of G93A SOD1 transgenic mice. These results suggest that pyruvate treatment may be a potential therapeutic strategy in ALS.
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Affiliation(s)
- Jong-Ha Park
- Department of Neurology, Seoul National University College of Medicine, Clinical Research Institute of Seoul National University Hospital, 28 Yongon-Dong, Chongno-Gu, Seoul 110-744, South Korea
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34
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Fatokun AA, Stone TW, Smith RA. Cell death in rat cerebellar granule neurons induced by hydrogen peroxide in vitro: mechanisms and protection by adenosine receptor ligands. Brain Res 2006; 1132:193-202. [PMID: 17188658 DOI: 10.1016/j.brainres.2006.11.008] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2006] [Revised: 11/02/2006] [Accepted: 11/03/2006] [Indexed: 11/23/2022]
Abstract
Oxidative stress, resulting from excessive production of reactive oxygen species (ROS), is a pathological state that causes profound cellular damage and eventual death resulting from the overactivation of glutamate receptors, and the generation of nitric oxide, superoxide and hydrogen peroxide (H(2)O(2)). As such, H(2)O(2) represents an important model for studying the neuropathology of oxidative stress in a variety of CNS disorders. The effects of H(2)O(2) on the viability of post-natal cerebellar granule neurons (CGNs), the nature of the cell death involved and the potential protection by adenosine receptors against the damage were examined in the current study. Hydrogen peroxide (10-400 microM) reduced CGN viability in a concentration- and time-dependent manner. The addition of catalase (100 U/ml) prevented this effect, and the non-specific COX inhibitor aspirin (1 mM) also alleviated the damage. A combination of H(2)O(2) (5 microM) and Cu(2+) (0.5 mM) resulted in a significant damage that was not prevented by the hydroxyl radical scavenger mannitol (50 mM). The permeability transition pore blocker cyclosporin A, the caspase-3 inhibitor Z-DEVD-fmk (40 microM) and the PARP-1 inhibitor DPQ (10 microM) each significantly protected against peroxide damage. While the A(1) adenosine receptor agonist CPA and the A(2A) receptor antagonist ZM241385 (each at 100 nM) elicited protection, the A(1) adenosine receptor blocker DPCPX and the A(2A) receptor agonist CGS21680 (each at 100 nM) showed no effect. The data demonstrate that H(2)O(2) induced oxidative stress in CGNs, involving both apoptotic and necrotic death, and this can be ameliorated by A(1) receptor activation or A(2A) receptor blockade.
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Affiliation(s)
- Amos A Fatokun
- Division of Neuroscience and Biomedical Systems, Institute of Biomedical and Life Sciences, West Medical Building, University of Glasgow, Glasgow G12 8QQ, Scotland, UK
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35
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Wang X, Perez E, Liu R, Yan LJ, Mallet RT, Yang SH. Pyruvate protects mitochondria from oxidative stress in human neuroblastoma SK-N-SH cells. Brain Res 2006; 1132:1-9. [PMID: 17174285 PMCID: PMC1853247 DOI: 10.1016/j.brainres.2006.11.032] [Citation(s) in RCA: 138] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2005] [Revised: 11/06/2006] [Accepted: 11/12/2006] [Indexed: 10/23/2022]
Abstract
Oxidative stress is implicated in neurodegenerative diseases including stroke, Alzheimer's disease and Parkinson's disease, and has been extensively studied as a potential target for therapeutic intervention. Pyruvate, a natural metabolic intermediate and energy substrate, exerts antioxidant effects in brain and other tissues susceptible to oxidative stress. We tested the protective effects of pyruvate on hydrogen peroxide (H(2)O(2)) toxicity in human neuroblastoma SK-N-SH cells and the mechanisms underlying its protection. Hydrogen peroxide insult resulted in 85% cell death, but co-treatment with pyruvate dose-dependently attenuated cell death. At concentrations of >or=1 mM, pyruvate totally blocked the cytotoxic effects of H(2)O(2). Pyruvate exerted its protective effects even when its administration was delayed up to 2 h after H(2)O(2) insult. As a scavenger of reactive oxygen species (ROS), pyruvate dose-dependently attenuated H(2)O(2)-induced ROS formation, assessed from 2,7-dichlorofluorescein diacetate fluorescence. Furthermore, pyruvate suppressed superoxide production by submitochondrial particles, and attenuated oxidative stress-induced collapse of the mitochondrial membrane potential. Collectively, these results suggest that pyruvate protects neuronal cells through its antioxidant actions on mitochondria.
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Affiliation(s)
- Xiaofei Wang
- Department of Pharmacology and Neuroscience, University of North Texas Health Science Center, Fort Worth, Texas 76107-2699
| | - Evelyn Perez
- Department of Pharmacology and Neuroscience, University of North Texas Health Science Center, Fort Worth, Texas 76107-2699
| | - Ran Liu
- Department of Pharmacology and Neuroscience, University of North Texas Health Science Center, Fort Worth, Texas 76107-2699
| | - Liang-Jun Yan
- Department of Pharmacology and Neuroscience, University of North Texas Health Science Center, Fort Worth, Texas 76107-2699
| | - Robert T. Mallet
- Department of Integrative Physiology, University of North Texas Health Science Center, Fort Worth, Texas 76107-2699
| | - Shao-Hua Yang
- Department of Pharmacology and Neuroscience, University of North Texas Health Science Center, Fort Worth, Texas 76107-2699
- *Address for correspondence: Shao-Hua Yang, MD. Ph.D. Department of Pharmacology and Neuroscience, University of North Texas Health Science Center, 3500 Camp Bowie Blvd, Fort Worth, TX 76107-2699, Tel: 817-735-2250, Fax: 817-735-0485, E-mail:
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Hinoi E, Takarada T, Tsuchihashi Y, Fujimori S, Moriguchi N, Wang L, Uno K, Yoneda Y. A Molecular Mechanism of Pyruvate Protection against Cytotoxicity of Reactive Oxygen Species in Osteoblasts. Mol Pharmacol 2006; 70:925-35. [PMID: 16766717 DOI: 10.1124/mol.106.024398] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
We demonstrated previously that exogenous pyruvate has a protective action against cell death by hydrogen peroxide in cultured osteoblasts through a mechanism associated with its antioxidative property. In the present study, we have evaluated possible participation of monocarboxylate transporters (MCTs) responsible for the bidirectional membrane transport of pyruvate in the cytoprotective property in osteoblasts. Expression of the MCT2 isoform was found in cultured rat calvarial osteoblasts and in osteoblasts located on mouse tibia at both mRNA and protein levels. The accumulation of [14C]pyruvate occurred in a temperature- and pH-dependent manner in osteoblasts cultured for 7 days with high sensitivity to a specific MCT inhibitor, whereas pyruvate was released into extracellular spaces from cultured osteoblasts in a fashion sensitive to the MCT inhibitor. Transient overexpression of the MCT2 isoform led to reduced vulnerability to the cytotoxicity of hydrogen peroxide with an increased activity of [14C]pyruvate accumulation in murine osteoblastic MC3T3-E1 cells. Ovariectomy significantly decreased the content of pyruvate in femoral bone marrows in mice in vivo, whereas daily i.p. administration of pyruvate at 0.25 g/kg significantly prevented alterations of several histomorphometric parameters as well as cancellous bone loss in femurs by ovariectomy on 28 days after the operation. These results suggest that MCTs may be functionally expressed by osteoblasts to play a pivotal role in mechanisms related to the cytoprotective property of pyruvate.
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Affiliation(s)
- Eiichi Hinoi
- Laboratory of Molecular Pharmacology, Division of Pharmaceutical Sciences, Kanazawa University Graduate School of Natural Science and Technology, Kanazawa, Ishikawa 920-1192, Japan
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37
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Krebs DL, Parent MB. Hippocampal infusions of pyruvate reverse the memory-impairing effects of septal muscimol infusions. Eur J Pharmacol 2006; 520:91-9. [PMID: 16150437 PMCID: PMC1668712 DOI: 10.1016/j.ejphar.2005.08.007] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2005] [Accepted: 08/05/2005] [Indexed: 10/25/2022]
Abstract
Hippocampal infusions of glucose reverse memory deficits in spontaneous alternation and in a continuous multiple trial inhibitory avoidance task. The current experiments tested whether glucose metabolism may participate in these effects of glucose. Specifically, these experiments determined whether the glycolytic metabolite pyruvate would mimic these effects of glucose. Male Sprague-Dawley rats were given septal infusions of vehicle or the gamma-aminobutyric acid (GABA) receptor agonist muscimol (0.15 nmol for spontaneous alternation or 5 nmol for continuous multiple trial inhibitory avoidance) combined with hippocampal infusions of vehicle or pyruvate (200 nmol) 15 min prior to assessing spontaneous alternation or training in a continuous multiple trial inhibitory avoidance task. The infusions of muscimol decreased percent alternation scores and continuous multiple trial inhibitory avoidance retention latencies tested 48 h after training. More importantly, hippocampal infusions of pyruvate reversed the deficits produced by septal infusions of muscimol on both tasks. These findings show for the first time that hippocampal infusions of pyruvate influence memory and suggest that glucose may affect memory via glycolytic metabolism.
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Affiliation(s)
- Desiree L. Krebs
- * Corresponding author. Tel.: +1 404 651 1755 (Lab), +1 404 651 3108 (Office); fax: +1 404 651 3929. E-mail address: (D.L. Krebs)
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38
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Tyurina YY, Nylander KD, Mirnics ZK, Portugal C, Yan C, Zaccaro C, Saragovi HU, Kagan VE, Schor NF. The intracellular domain of p75NTR as a determinant of cellular reducing potential and response to oxidant stress. Aging Cell 2005; 4:187-96. [PMID: 16026333 DOI: 10.1111/j.1474-9726.2005.00160.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
The low-affinity neurotrophin receptor, p75NTR, has been found to be pro- or anti-apoptotic depending upon the cell in which it is expressed. Reactive oxygen species play a major role in apoptosis induction and enactment. Using two polyclonal PC12 populations that, respectively, do or do not express p75NTR, this paper demonstrates that p75NTR expression confers resistance to oxidant stress upon PC12 cells maintained in serum-containing medium. The effect of p75NTR on cell survival is mimicked in p75-negative cells by expression of constructs that produce the p75NTR intracellular domain (ICD) or p75NTR with the extracellular domain deleted (DeltaECD), suggesting that binding of an extracellular ligand to p75NTR is not required. Our studies further document that the differential sensitivity to oxidant stress is serum-dependent and associated with differential oxidation of glutathione between p75-positive and p75-negative cells. These results suggest that the role of p75NTR in determining the consequences and treatment of age-related disorders and conditions in which reactive oxygen species are involved may require neither the extracellular receptor domain nor, by inference, the cognate extracellular ligands of this neurotrophin receptor.
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Affiliation(s)
- Yulia Y Tyurina
- Pediatric Center for Neuroscience, Children's Hospital of Pittsburgh, Pittsburgh, PA 15213, USA
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39
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Nakamichi N, Kambe Y, Oikawa H, Ogura M, Takano K, Tamaki K, Inoue M, Hinoi E, Yoneda Y. Protection by exogenous pyruvate through a mechanism related to monocarboxylate transporters against cell death induced by hydrogen peroxide in cultured rat cortical neurons. J Neurochem 2005; 93:84-93. [PMID: 15773908 DOI: 10.1111/j.1471-4159.2005.02999.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In cortical neurons cultured for 3 or 9 days in vitro (DIV), exposure to hydrogen peroxide (H(2)O(2)) led to a marked decrease in cell viability in a concentration-dependent manner at a concentration range of 10 microm to 1 mm irrespective of the duration between 6 and 24 h. However, H(2)O(2) was more potent in decreasing cellular viability in cortical neurons cultured for 9 DIV than in those for 3 DIV. Pyruvate was effective in preventing the neuronal cell death at 1 mm even when added 1-3 h after the addition of H(2)O(2). Semi-quantitative RT-PCR and western blotting analyses revealed significantly higher expression of both mRNA and protein for a particular monocarboxylate transporter (MCT) in neurons cultured for 9 DIV than in those for 3 DIV. A specific inhibitor of MCT significantly attenuated the neuroprotection by pyruvate in neurons cultured for 9 DIV, without markedly affecting that in neurons cultured for 3 DIV. These results suggest that vulnerability to H(2)O(2) may at least in part involve expression of particular MCT isoforms responsible for the bi-directional transport of pyruvate across cell surfaces in cultured rat cortical neurons.
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Affiliation(s)
- Noritaka Nakamichi
- Laboratory of Molecular Pharmacology, Division of Pharmaceutical Sciences, Kanazawa University Graduate School of Natural Science and Technology, Kanazawa, Ishikawa, Japan
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40
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Yoo BK, Choi JW, Yoon SY, Ko KH. Protective effect of adenosine and purine nucleos(t)ides against the death by hydrogen peroxide and glucose deprivation in rat primary astrocytes. Neurosci Res 2005; 51:39-44. [PMID: 15596239 DOI: 10.1016/j.neures.2004.09.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2004] [Accepted: 09/16/2004] [Indexed: 11/28/2022]
Abstract
Previously, we have shown that hydrogen peroxide (H2O2) and glucose deprivation (GD) induced ATP loss and cell death in astrocytes. Here, we reported that adenosine and related purine nucleos(t)ides recovered cellular ATP level and completely prevented the cell death in rat primary astrocytes co-treated with H2O2 and glucose deprivation. Time- and concentration-dependently, H2O2 induced cell death and ATP loss in glucose-deprived astrocytes. Adenosine or ATP prevented both astrocytic death and ATP loss caused by H2O2/GD in dose-dependent manner. Further, inhibition of adenosine deamination or transport with erythro-9-(-hydroxy-3-nonyl)adenosine or S-(4-nitrobenzyl)-6-thioinosine largely attenuated the protective effect of adenosine. Other purine nucleos(t)ides such as inosine, guanosine, ADP, AMP, ITP and GTP also showed similar protective effects. Adenosine or ATP also blocked the mitochondrial dysfunction and glutathione (GSH) depletion in H2O2-treated glucose-deprived astrocytes. The present results suggest that adenosine and related purine nucleos(t)ides may protect astrocytes from H2O2 and glucose deprivation induced the potentiated death by restoration of cellular ATP level.
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Affiliation(s)
- Byoung-Kwon Yoo
- Department of Pharmacology, College of Pharmacy, Seoul National University, San 56-1, Shillim-Dong, Kwanak-Gu, Seoul 151-742, Republic of Korea
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Mazzio EA, Reams RR, Soliman KFA. The role of oxidative stress, impaired glycolysis and mitochondrial respiratory redox failure in the cytotoxic effects of 6-hydroxydopamine in vitro. Brain Res 2004; 1004:29-44. [PMID: 15033417 DOI: 10.1016/j.brainres.2003.12.034] [Citation(s) in RCA: 78] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/11/2003] [Indexed: 11/16/2022]
Abstract
The neurotoxin, 6-hydroxydopamine (6-OHDA) has been implicated in the neurodegenerative process of Parkinson's disease. The current study was designed to elucidate the toxicological effects of 6-OHDA on energy metabolism in neuroblastoma (N-2A) cells. The toxicity of 6-OHDA corresponds to the total collapse of anaerobic/aerobic cell function, unlike other mitochondrial toxins such as MPP+ that target specific loss of aerobic metabolism. The toxicity of 6-OHDA paralleled the loss of mitochondrial oxygen (O2) consumption (MOC), glycolytic activity, ATP, H+ ion gradients, membrane potential and accumulation of the autoxidative product, hydrogen peroxide (H2O2). Removing H2O2 with nonenzymatic stoichiometric scavengers, such as carboxylic acids, glutathione and catalase yielded partial protection. The rapid removal of H2O2 with pyruvate or catalase restored only anaerobic glycolysis, but did not reverse the loss of MOC, indicating mitochondrial impairment is independent of H2O2. The H2O2 generated by 6-OHDA contributed toward the loss of anaerobic glycolysis through lipid peroxidation and lactic acid dehydrogenase inhibition. The ability of 6-OHDA to maintain oxidized cytochrome c (CYT-C-OX) in its reduced form (CYT-C-RED), appears to play a role in mitohondrial impairment. The reduction of CYT-C by 6-OHDA, was extensive, occurred within minutes, preceded formation of H2O2 and was unaffected by catalase or superoxide dismutase. At similar concentrations, 6-OHDA readily altered the valence state of iron [Fe(III)] to Fe(II), which would also theoretically sustain CYT-C in its reduced form. In isolated mitochondria, 6-OHDA had negligible effects on complex I, inhibited complex II and interfered with complex III by maintaining the substrate, CYT-C in a reduced state. 6-OHDA caused a transient and potent surge in isolated cytochrome oxidase (complex IV) activity, with rapid recovery as a result of 6-OHDA recycling CYT-C-OX to CYT-C-RED. Typical mitochondrial toxins such as MPP+, azide and antimycin appeared to inhibit the catalytic activity of ETC enzymes. In contrast, 6-OHDA alters the redox of the cytochromes, resulting in loss of substrate availability and obstruction of oxidation-reduction events. Complete cytoprotection against 6-OHDA toxicity and restored MOC was achieved by combining catalase with CYT-C (horse heart). In summary, CYT-C reducing properties are unique to catecholamine neurotransmitters, and may play a significant role in selective vulnerability of dopaminergic neurons to mitochondrial insults.
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Affiliation(s)
- Elizabeth A Mazzio
- College of Pharmacy and Pharmaceutical Sciences, Florida A&M University, Tallahassee, FL 32307, USA
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42
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González-Falcón A, Candelario-Jalil E, García-Cabrera M, León OS. Effects of pyruvate administration on infarct volume and neurological deficits following permanent focal cerebral ischemia in rats. Brain Res 2003; 990:1-7. [PMID: 14568323 DOI: 10.1016/s0006-8993(03)03378-x] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Recent experimental evidences indicate that pyruvate, the final metabolite of glycolysis, has a remarkable protective effect against different types of brain injury. The purpose of this study was to assess the neuroprotective effect and the neurological outcome after pyruvate administration in a model of ischemic stroke induced by permanent middle cerebral artery occlusion (pMCAO) in rats. Three doses of pyruvate (250, 500 and 1000 mg/kg, i.p.) or vehicle were administered intraperitoneally 30 min after pMCAO. In other set of experiments, pyruvate was given either before, immediately after ischemia or in a long-term administration paradigm. Functional outcome, mortality and infarct volume were determined 24 h after stroke. Even when the lowest doses of pyruvate reduced mortality and neurological deficits, no concomitant reduction in infarct volume was observed. The highest dose of pyruvate increased cortical infarction by 27% when administered 30 min after pMCAO. In addition, when pyruvate was given before pMCAO, a significant increase in neurological deficits was noticed. Surprisingly, on the contrary of what was found in the case of transient global ischemia, present findings do not support a great neuroprotective role for pyruvate in permanent focal cerebral ischemia, suggesting two distinct mechanisms involved in the effects of this glycolytic metabolite in the ischemic brain.
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Affiliation(s)
- Armando González-Falcón
- Department of Pharmacology, University of Havana (CIEB-IFAL), Apartado Postal 6079, Havana City 10600, Cuba
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