151
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O'Brien KM, Crockett EL, Philip J, Oldham CA, Hoffman M, Kuhn DE, Barry R, McLaughlin J. The loss of hemoglobin and myoglobin does not minimize oxidative stress in Antarctic icefishes. ACTA ACUST UNITED AC 2018; 221:jeb.162503. [PMID: 29361578 DOI: 10.1242/jeb.162503] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Accepted: 12/11/2017] [Indexed: 01/07/2023]
Abstract
The unusual pattern of expression of hemoglobin (Hb) and myoglobin (Mb) among Antarctic notothenioid fishes provides an exceptional model system for assessing the impact of these proteins on oxidative stress. We tested the hypothesis that the lack of oxygen-binding proteins may reduce oxidative stress. Levels and activity of pro-oxidants and small-molecule and enzymatic antioxidants, and levels of oxidized lipids and proteins in the liver, oxidative skeletal muscle and heart ventricle were quantified in five species of notothenioid fishes differing in the expression of Hb and Mb. Levels of ubiquitinated proteins and rates of protein degradation by the 20S proteasome were also quantified. Although levels of oxidized proteins and lipids, ubiquitinated proteins, and antioxidants were higher in red-blooded fishes than in Hb-less icefishes in some tissues, this pattern did not persist across all tissues. Expression of Mb was not associated with oxidative damage in the heart ventricle, whereas the activity of citrate synthase and the contents of heme were positively correlated with oxidative damage in most tissues. Despite some tissue differences in levels of protein carbonyls among species, rates of degradation by the 20S proteasome were not markedly different, suggesting either alternative pathways for eliminating oxidized proteins or that redox tone varies among species. Together, our data indicate that the loss of Hb and Mb does not correspond with a clear pattern of either reduced oxidative defense or oxidative damage.
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Affiliation(s)
- Kristin M O'Brien
- Institute of Arctic Biology, University of Alaska, Fairbanks, Alaska, 99775, USA
| | | | - Jacques Philip
- Center for Alaska Native Health Research, University of Alaska, Fairbanks, Alaska, 99775, USA
| | - Corey A Oldham
- Institute of Arctic Biology, University of Alaska, Fairbanks, Alaska, 99775, USA
| | - Megan Hoffman
- Institute of Arctic Biology, University of Alaska, Fairbanks, Alaska, 99775, USA
| | - Donald E Kuhn
- Department of Biological Sciences, Ohio University, Athens, Ohio, 45701, USA
| | - Ronald Barry
- Department of Mathematics and Statistics, University of Alaska, Fairbanks, Alaska, 99775, USA
| | - Jessica McLaughlin
- Institute of Arctic Biology, University of Alaska, Fairbanks, Alaska, 99775, USA
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152
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Van Hoewyk D, Taskin MB, Yaprak AE, Turgay OC, Ergul A. Profiling of proteasome activity in Alyssum species on serpentine soils in Turkey reveals possible insight into nickel tolerance and accumulation. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2018; 124:184-189. [PMID: 29414314 DOI: 10.1016/j.plaphy.2018.01.022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 01/22/2018] [Accepted: 01/22/2018] [Indexed: 06/08/2023]
Abstract
In crops and most plants, nickel induces oxidative stress resulting in oxidized and misfolded proteins. Proteasomes maintain cellular homeostasis during stress by removing these damaged proteins. Although mild stress tolerance is mediated by proteasomal proteolysis of misfolded and oxidized proteins, previous studies have observed that severe nickel stress decreases proteasome activity in nickel-sensitive plants. Whether or not proteasome function is impaired in nickel-tolerant plants is not know. Therefore, we tested the hypothesis that proteasome activity is elevated in nickel-tolerant Alyssum species capable of accumulating nickel to unusually high levels. Our field studies examined Alyssum sibiricum and Alyssum caricum, a moderate nickel accumulator and hyper-accumulator respectively, growing on their native serpentine soil in Turkey. A. sibiricum had higher proteasome activity on serpentine soil compared to non-serpentine soil; these plants also had elevated levels of nickel accumulation and higher proteasome activity compared to other low accumulating plants in the genus Festuca or Astragalus. In A. caricum, proteasome activity was very weakly correlated with nickel soil bioavailability or accumulation in leaf tissue, suggesting that proteasome function was not impaired in plants that accumulated the highest concentration of nickel. We discuss if maintained proteasome activity might underpin nickel tolerance and the unique ecophysiology of nickel hyper-accumulation in plants.
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Affiliation(s)
- Doug Van Hoewyk
- Coastal Carolina University, Department of Biology, Conway, SC 29526, USA.
| | - Mehmet Burak Taskin
- Ankara University, Faculty of Agriculture, Department of Soil Science and Plant Nutrition, 06110 Ankara, Turkey
| | - Ahmet Emre Yaprak
- Ankara University, Faculty of Science, Department of Biology, 06110 Ankara, Turkey
| | - Oğuz Can Turgay
- Ankara University, Faculty of Agriculture, Department of Soil Science and Plant Nutrition, 06110 Ankara, Turkey.
| | - Ali Ergul
- Ankara University, Biotechnology Institute, 06110 Ankara, Turkey
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153
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Pigna E, Renzini A, Greco E, Simonazzi E, Fulle S, Mancinelli R, Moresi V, Adamo S. HDAC4 preserves skeletal muscle structure following long-term denervation by mediating distinct cellular responses. Skelet Muscle 2018; 8:6. [PMID: 29477142 PMCID: PMC6389241 DOI: 10.1186/s13395-018-0153-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Accepted: 02/18/2018] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Denervation triggers numerous molecular responses in skeletal muscle, including the activation of catabolic pathways and oxidative stress, leading to progressive muscle atrophy. Histone deacetylase 4 (HDAC4) mediates skeletal muscle response to denervation, suggesting the use of HDAC inhibitors as a therapeutic approach to neurogenic muscle atrophy. However, the effects of HDAC4 inhibition in skeletal muscle in response to long-term denervation have not been described yet. METHODS To further study HDAC4 functions in response to denervation, we analyzed mutant mice in which HDAC4 is specifically deleted in skeletal muscle. RESULTS After an initial phase of resistance to neurogenic muscle atrophy, skeletal muscle with a deletion of HDAC4 lost structural integrity after 4 weeks of denervation. Deletion of HDAC4 impaired the activation of the ubiquitin-proteasome system, delayed the autophagic response, and dampened the OS response in skeletal muscle. Inhibition of the ubiquitin-proteasome system or the autophagic response, if on the one hand, conferred resistance to neurogenic muscle atrophy; on the other hand, induced loss of muscle integrity and inflammation in mice lacking HDAC4 in skeletal muscle. Moreover, treatment with the antioxidant drug Trolox prevented loss of muscle integrity and inflammation in in mice lacking HDAC4 in skeletal muscle, despite the resistance to neurogenic muscle atrophy. CONCLUSIONS These results reveal new functions of HDAC4 in mediating skeletal muscle response to denervation and lead us to propose the combined use of HDAC inhibitors and antioxidant drugs to treat neurogenic muscle atrophy.
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Affiliation(s)
- Eva Pigna
- DAHFMO Unit of Histology and Medical Embryology, Interuniversity Institute of Myology, Sapienza University of Rome, Rome, Italy
| | - Alessandra Renzini
- DAHFMO Unit of Histology and Medical Embryology, Interuniversity Institute of Myology, Sapienza University of Rome, Rome, Italy
| | - Emanuela Greco
- DAHFMO Unit of Histology and Medical Embryology, Interuniversity Institute of Myology, Sapienza University of Rome, Rome, Italy
| | - Elena Simonazzi
- DAHFMO Unit of Histology and Medical Embryology, Interuniversity Institute of Myology, Sapienza University of Rome, Rome, Italy
| | - Stefania Fulle
- Department of Neuroscience Imaging and Clinical Sciences-Section of Physiology and Physiopathology, University "G. d'Annunzio" Chieti-Pescara, Chieti, Italy
| | - Rosa Mancinelli
- Department of Neuroscience Imaging and Clinical Sciences-Section of Physiology and Physiopathology, University "G. d'Annunzio" Chieti-Pescara, Chieti, Italy
| | - Viviana Moresi
- DAHFMO Unit of Histology and Medical Embryology, Interuniversity Institute of Myology, Sapienza University of Rome, Rome, Italy.
| | - Sergio Adamo
- DAHFMO Unit of Histology and Medical Embryology, Interuniversity Institute of Myology, Sapienza University of Rome, Rome, Italy
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154
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Sem1 links proteasome stability and specificity to multicellular development. PLoS Genet 2018; 14:e1007141. [PMID: 29401458 PMCID: PMC5821377 DOI: 10.1371/journal.pgen.1007141] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Revised: 02/21/2018] [Accepted: 12/01/2017] [Indexed: 12/18/2022] Open
Abstract
The transition from vegetative growth to multicellular development represents an evolutionary hallmark linked to an oxidative stress signal and controlled protein degradation. We identified the Sem1 proteasome subunit, which connects stress response and cellular differentiation. The sem1 gene encodes the fungal counterpart of the human Sem1 proteasome lid subunit and is essential for fungal cell differentiation and development. A sem1 deletion strain of the filamentous fungus Aspergillus nidulans is able to grow vegetatively and expresses an elevated degree of 20S proteasomes with multiplied ATP-independent catalytic activity compared to wildtype. Oxidative stress induces increased transcription of the genes sem1 and rpn11 for the proteasomal deubiquitinating enzyme. Sem1 is required for stabilization of the Rpn11 deubiquitinating enzyme, incorporation of the ubiquitin receptor Rpn10 into the 19S regulatory particle and efficient 26S proteasome assembly. Sem1 maintains high cellular NADH levels, controls mitochondria integrity during stress and developmental transition. The cellular ubiquitin-proteasome pathway is essential to control cell cycle, gene expression or the response to oxidative stress. Sem1 is conserved in eukaryotes from single cell yeasts to humans as intrinsically disordered and multifunctional protein. Sem1 supports the assembly of several multiprotein complexes but becomes eventually exclusively a subunit of the lid of the 26S proteasome, a cellular machine with a molecular mass of about two megadalton. Defects in the function of the proteasome, which degrades a large fraction of intracellular proteins, result in cancer or neurodegenerative diseases. We showed that Sem1 from a multicellular fungus is required for accurate 26S proteasome assembly and specific activity as prerequisites for mitochondria integrity, oxidative stress response and cell differentiation. Our findings of the complex and dynamic interplay between multiple cellular processes mediated by a small conserved intrinsically unordered protein sheds light and supports current efforts to understand and explore in more details potential therapies to eventually treat age-related human diseases.
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155
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Ma X, Lee S, Fei X, Fang G, Huynh T, Chong Y, Chai Z, Ge C, Zhou R. Inhibition of the proteasome activity by graphene oxide contributes to its cytotoxicity. Nanotoxicology 2018; 12:185-200. [DOI: 10.1080/17435390.2018.1425503] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Xiaochuan Ma
- School for Radiological and Interdisciplinary Sciences (RAD-X), Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, China
| | - Sangyun Lee
- Computational Biology Center, IBM Thomas J. Watson Research Center, New York, NY, USA
| | - Xingshu Fei
- School for Radiological and Interdisciplinary Sciences (RAD-X), Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, China
| | - Ge Fang
- School for Radiological and Interdisciplinary Sciences (RAD-X), Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, China
| | - Tien Huynh
- Computational Biology Center, IBM Thomas J. Watson Research Center, New York, NY, USA
| | - Yu Chong
- School for Radiological and Interdisciplinary Sciences (RAD-X), Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, China
| | - Zhifang Chai
- School for Radiological and Interdisciplinary Sciences (RAD-X), Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, China
| | - Cuicui Ge
- School for Radiological and Interdisciplinary Sciences (RAD-X), Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, China
| | - Ruhong Zhou
- School for Radiological and Interdisciplinary Sciences (RAD-X), Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, China
- Computational Biology Center, IBM Thomas J. Watson Research Center, New York, NY, USA
- Department of Chemistry, Columbia University, New York, NY, USA
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156
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Wang C, Rong H, Liu H, Wang X, Gao Y, Deng R, Liu R, Liu Y, Zhang D. Detoxification mechanisms, defense responses, and toxicity threshold in the earthworm Eisenia foetida exposed to ciprofloxacin-polluted soils. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 612:442-449. [PMID: 28863375 DOI: 10.1016/j.scitotenv.2017.08.120] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Revised: 07/20/2017] [Accepted: 08/12/2017] [Indexed: 06/07/2023]
Abstract
The widespread application of antibiotics poses health risks for agro-ecosystems. This study examined the effects of ciproflaxin (CIP)-polluted soils (0-51.2mgCIP/kg) on the earthworm Eisenia foetida. The enhanced activities and isozyme levels of superoxide dismutase (SOD) and ascorbate peroxidase after 15days of CIP exposure suggested reactive oxygen species overproduction and thus the generation of oxidatively damaged proteins (e.g., carbonylated proteins) in the earthworms. Under mild CIP stress, the 20S proteasome was capable of degrading most of the damaged proteins independent of ubiquitin. Under severe stress, proteases and endoproteases were up-regulated and maintained the proteolysis as 20S proteasome activity diminished. These observations suggested that, together with glutathione S-transferases, which also participated in the detoxification, 20S proteasome, proteases, endoproteases, and antioxidant enzymes constituted a detoxification and defense system in the earthworms. The biphasic dose responses of these cellular components confirmed that the dose range tested was reasonable for the bioassay of CIP-polluted soils. Our results also demonstrated the potential utility of SOD and ubiquitin as highly sensitive biomarkers in the early bioassay of CIP-polluted soils. Bases on the results, a toxicity threshold for CIP-polluted soils of 3.2-6.4mgCIP/kg soil can be proposed.
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Affiliation(s)
- Chengrun Wang
- School of Biological Engineering, Huainan Normal University, Huainan 232038, China.
| | - Hong Rong
- School of Biological Engineering, Huainan Normal University, Huainan 232038, China
| | - Haitao Liu
- School of Biological Engineering, Huainan Normal University, Huainan 232038, China
| | - Xiaofei Wang
- School of Biological Engineering, Huainan Normal University, Huainan 232038, China
| | - Yixin Gao
- School of Biological Engineering, Huainan Normal University, Huainan 232038, China
| | - Ruhua Deng
- School of Biological Engineering, Huainan Normal University, Huainan 232038, China
| | - Ruiyu Liu
- School of Biological Engineering, Huainan Normal University, Huainan 232038, China
| | - Yun Liu
- School of Biological Engineering, Huainan Normal University, Huainan 232038, China
| | - Di Zhang
- School of Biological Engineering, Huainan Normal University, Huainan 232038, China
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157
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Valenzuela R, Rincón-Cervera MÁ, Echeverría F, Barrera C, Espinosa A, Hernández-Rodas MC, Ortiz M, Valenzuela A, Videla LA. Iron-induced pro-oxidant and pro-lipogenic responses in relation to impaired synthesis and accretion of long-chain polyunsaturated fatty acids in rat hepatic and extrahepatic tissues. Nutrition 2018; 45:49-58. [DOI: 10.1016/j.nut.2017.07.007] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Revised: 07/04/2017] [Accepted: 07/05/2017] [Indexed: 12/21/2022]
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158
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McMillan LJ, Hwang S, Farah RE, Koh J, Chen S, Maupin-Furlow JA. Multiplex quantitative SILAC for analysis of archaeal proteomes: a case study of oxidative stress responses. Environ Microbiol 2017; 20:385-401. [PMID: 29194950 DOI: 10.1111/1462-2920.14014] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Revised: 11/27/2017] [Accepted: 11/28/2017] [Indexed: 01/08/2023]
Abstract
Stable isotope labelling of amino acids in cell culture (SILAC) is a quantitative proteomic method that can illuminate new pathways used by cells to adapt to different lifestyles and niches. Archaea, while thriving in extreme environments and accounting for ∼20%-40% of the Earth's biomass, have not been analyzed with the full potential of SILAC. Here, we report SILAC for quantitative comparison of archaeal proteomes, using Haloferax volcanii as a model. A double auxotroph was generated that allowed for complete incorporation of 13 C/15 N-lysine and 13 C-arginine such that each peptide derived from trypsin digestion was labelled. This strain was found amenable to multiplex SILAC by case study of responses to oxidative stress by hypochlorite. A total of 2565 proteins was identified by LC-MS/MS analysis (q-value ≤ 0.01) that accounted for 64% of the theoretical proteome. Of these, 176 proteins were altered at least 1.5-fold (p-value < 0.05) in abundance during hypochlorite stress. Many of the differential proteins were of unknown function. Those of known function included transcription factor homologs related to oxidative stress by 3D-homology modelling and orthologous group comparisons. Thus, SILAC is found to be an ideal method for quantitative proteomics of archaea that holds promise to unravel gene function.
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Affiliation(s)
- Lana J McMillan
- Department of Microbiology and Cell Science, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL 32611, USA.,Genetics Institute, University of Florida, Gainesville, FL 32611, USA
| | - Sungmin Hwang
- Department of Microbiology and Cell Science, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL 32611, USA
| | - Rawan E Farah
- Department of Microbiology and Cell Science, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL 32611, USA
| | - Jin Koh
- Proteomics and Mass Spectrometry, Interdisciplinary Center for Biotechnology Research, University of Florida, Gainesville, FL 32611, USA
| | - Sixue Chen
- Genetics Institute, University of Florida, Gainesville, FL 32611, USA.,Proteomics and Mass Spectrometry, Interdisciplinary Center for Biotechnology Research, University of Florida, Gainesville, FL 32611, USA.,Department of Biology, College of Liberal Arts and Sciences, University of Florida, Gainesville, FL 32611, USA
| | - Julie A Maupin-Furlow
- Department of Microbiology and Cell Science, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL 32611, USA.,Genetics Institute, University of Florida, Gainesville, FL 32611, USA
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159
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Markkanen E. Not breathing is not an option: How to deal with oxidative DNA damage. DNA Repair (Amst) 2017; 59:82-105. [PMID: 28963982 DOI: 10.1016/j.dnarep.2017.09.007] [Citation(s) in RCA: 118] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Accepted: 09/20/2017] [Indexed: 02/07/2023]
Abstract
Oxidative DNA damage constitutes a major threat to genetic integrity, and has thus been implicated in the pathogenesis of a wide variety of diseases, including cancer and neurodegeneration. 7,8-dihydro-8oxo-deoxyGuanine (8-oxo-G) is one of the best characterised oxidative DNA lesions, and it can give rise to point mutations due to its miscoding potential that instructs most DNA polymerases (Pols) to preferentially insert Adenine (A) opposite 8-oxo-G instead of the correct Cytosine (C). If uncorrected, A:8-oxo-G mispairs can give rise to C:G→A:T transversion mutations. Cells have evolved a variety of pathways to mitigate the mutational potential of 8-oxo-G that include i) mechanisms to avoid incorporation of oxidized nucleotides into DNA through nucleotide pool sanitisation enzymes (by MTH1, MTH2, MTH3 and NUDT5), ii) base excision repair (BER) of 8-oxo-G in DNA (involving MUTYH, OGG1, Pol λ, and other components of the BER machinery), and iii) faithful bypass of 8-oxo-G lesions during replication (using a switch between replicative Pols and Pol λ). In the following, the fate of 8-oxo-G in mammalian cells is reviewed in detail. The differential origins of 8-oxo-G in DNA and its consequences for genetic stability will be covered. This will be followed by a thorough discussion of the different mechanisms in place to cope with 8-oxo-G with an emphasis on Pol λ-mediated correct bypass of 8-oxo-G during MUTYH-initiated BER as well as replication across 8-oxo-G. Furthermore, the multitude of mechanisms in place to regulate key proteins involved in 8-oxo-G repair will be reviewed. Novel functions of 8-oxo-G as an epigenetic-like regulator and insights into the repair of 8-oxo-G within the cellular context will be touched upon. Finally, a discussion will outline the relevance of 8-oxo-G and the proteins involved in dealing with 8-oxo-G to human diseases with a special emphasis on cancer.
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Affiliation(s)
- Enni Markkanen
- Institute of Veterinary Pharmacology and Toxicology, Vetsuisse Faculty, University of Zürich, Winterthurerstr. 260, 8057 Zürich, Switzerland.
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160
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Chen YH, Lin WW, Liu CS, Su SL. H2O2 induces caveolin‑1 degradation and impaired mitochondrial function in E11 podocytes. Mol Med Rep 2017; 16:7841-7847. [PMID: 28944844 DOI: 10.3892/mmr.2017.7497] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Accepted: 06/28/2017] [Indexed: 11/05/2022] Open
Abstract
Increased intercellular reactive oxygen species (ROS) levels are the major cause of podocyte injury with proteinuria. Caveolin‑1 (CAV‑1) is an essential protein component of caveolae. CAV‑1 participates in signal transduction and endocytic trafficking. Recent research has indicated that CAV‑1 regulates oxidative stress‑induced pathways. The present study used hydrogen peroxide (H2O2) at nontoxic concentrations to elevate the level of ROS in E11 podocytes. Treatment with 500 and 1,000 µM H2O2 for 1 h significantly reduced CAV‑1 expression levels. Simultaneously, the treatment significantly reduced the expression of the antioxidant enzymes glutamine‑cysteine ligase catalytic subunit, superoxide dismutase 2 and catalase. To determine the role of CAV‑1 in mediating oxidative stress, E11 podocytes were administered antenapedia‑CAV‑1 (AP‑CAV‑1) peptide for 48 h. The AP‑CAV‑1 treatment enhanced CAV‑1 expression and inhibited cyclophilin A expression, thus reducing ROS‑induced inflammation. Moreover, CAV‑1 protected against H2O2‑induced oxidative stress responses by enhancing the expression of antioxidant enzymes. Furthermore, CAV‑1 attenuated H2O2‑induced changes oxidative phosphorylation, and the expression of optic atrophy 1 and translocase of the inner membrane 23, as well as preserving mitochondrial function. CAV‑1 treatment significantly suppressed apoptosis, as indicated by a higher B‑cell lymphoma 2/BCL2‑associated X protein ratio. Therefore, enhancing the expression of CAV‑1 may be an important therapeutic consideration in treating podocyte injury.
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Affiliation(s)
- Ya-Hui Chen
- Vascular and Genomic Center, Changhua Christian Hospital, Changhua 50094, P.R. China
| | - Wei-Wen Lin
- Division of Cardiovascular Center, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung 40705, P.R. China
| | - Chin-San Liu
- Vascular and Genomic Center, Changhua Christian Hospital, Changhua 50094, P.R. China
| | - Shih-Li Su
- Vascular and Genomic Center, Changhua Christian Hospital, Changhua 50094, P.R. China
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161
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Comparative Analysis of AGE and RAGE Levels in Human Somatic and Embryonic Stem Cells under H 2O 2-Induced Noncytotoxic Oxidative Stress Conditions. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:4240136. [PMID: 29104727 PMCID: PMC5623800 DOI: 10.1155/2017/4240136] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Revised: 03/27/2017] [Accepted: 05/03/2017] [Indexed: 12/21/2022]
Abstract
The accumulation of advanced glycation end products (AGEs) occurs in ageing and in many degenerative diseases as a final outcome of persistent oxidative stress on cells and organs. Environmental alterations taking place during early embryonic development can also lead to oxidative damage, reactive oxygen species (ROS) production, and AGE accumulation. Whether similar mechanisms act on somatic and embryonic stem cells (ESC) exposed to oxidative stress is not known; and therefore, the modelling of oxidative stress in vitro on human ESC has been the focus of this study. We compared changes in Nε-carboxymethyl-lysine (CML) advanced glycation end products and RAGE levels in hESC versus differentiated somatic cells exposed to H2O2 within the noncytotoxic range. Our data revealed that hESC accumulates CML and RAGE under oxidative stress conditions in different ways than somatic cells, being the accumulation of CML statistically significant only in somatic cells and, conversely, the RAGE increase exclusively appreciated in hESC. Then, following cardiac and neural differentiation, we observed a progressive removal of AGEs and at the same time an elevated activity of the 20S proteasome. We conclude that human ESCs constitute a unique model to study the consequence of an oxidative environment in the pluripotent cells of the embryo during the human preimplantation period.
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162
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Cadmium effects on DNA and protein metabolism in oyster (Crassostrea gigas) revealed by proteomic analyses. Sci Rep 2017; 7:11716. [PMID: 28916745 PMCID: PMC5601910 DOI: 10.1038/s41598-017-11894-7] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Accepted: 08/31/2017] [Indexed: 12/15/2022] Open
Abstract
Marine molluscs, including oysters, can concentrate high levels of cadmium (Cd) in their soft tissues, but the molecular mechanisms of Cd toxicity remain speculative. In this study, Pacific oysters (Crassostrea gigas) were exposed to Cd for 9 days and their gills were subjected to proteomic analysis, which were further confirmed with transcriptomic analysis. A total of 4,964 proteins was quantified and 515 differentially expressed proteins were identified in response to Cd exposure. Gene Ontology enrichment analysis revealed that excess Cd affected the DNA and protein metabolism. Specifically, Cd toxicity resulted in the inhibition of DNA glycosylase and gap-filling and ligation enzymes expressions in base excision repair pathway, which may have decreased DNA repair capacity. At the protein level, Cd induced the heat shock protein response, initiation of protein refolding as well as degradation by ubiquitin proteasome pathway, among other effects. Excess Cd also induced antioxidant responses, particularly glutathione metabolism, which play important roles in Cd chelation and anti-oxidation. This study provided the first molecular mechanisms of Cd toxicity on DNA and protein metabolism at protein levels, and identified molecular biomarkers for Cd toxicity in oysters.
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163
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Methionine Sulfoxide Reductase A (MsrA) and Its Function in Ubiquitin-Like Protein Modification in Archaea. mBio 2017; 8:mBio.01169-17. [PMID: 28874471 PMCID: PMC5587910 DOI: 10.1128/mbio.01169-17] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Methionine sulfoxide reductase A (MsrA) is an antioxidant enzyme found in all domains of life that catalyzes the reduction of methionine-S-sulfoxide (MSO) to methionine in proteins and free amino acids. We demonstrate that archaeal MsrA has a ubiquitin-like (Ubl) protein modification activity that is distinct from its stereospecific reduction of MSO residues. MsrA catalyzes this Ubl modification activity, with the Ubl-activating E1 UbaA, in the presence of the mild oxidant dimethyl sulfoxide (DMSO) and in the absence of reductant. In contrast, the MSO reductase activity of MsrA is inhibited by DMSO and requires reductant. Liquid chromatography-tandem mass spectrometry (LC-MS/MS) analysis reveals that MsrA-dependent Ubl conjugates are associated with DNA replication, protein remodeling, and oxidative stress and include the Ubl-modified MsrA, Orc3 (Orc1/Cdc6), and Cdc48d (Cdc48/p97 AAA+ ATPase). Overall, we found archaeal MsrA to have opposing MSO reductase and Ubl modifying activities that are associated with oxidative stress responses and controlled by exposure to mild oxidant. Proteins that are damaged by oxidative stress are often targeted for proteolysis by the ubiquitin-proteasome system (UPS). The mechanisms that control this response are poorly understood, especially under conditions of mild oxidative stress when protein damage is modest. Here, we discovered a novel function of archaeal MsrA in guiding the Ubl modification of target proteins in the presence of mild oxidant. This newly reported activity of MsrA is distinct from its stereospecific reduction of methionine-S-sulfoxide to methionine residues. Our results are significant steps forward, first, in elucidating a protein factor that guides Ubl modification in archaea, and second, in providing an insight into oxidative stress responses that can trigger Ubl modification in a cell.
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164
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Wu J, Tian Z, Sun Y, Lu C, Liu N, Gao Z, Zhang L, Dong S, Yang F, Zhong X, Xu C, Lu F, Zhang W. Exogenous H 2S facilitating ubiquitin aggregates clearance via autophagy attenuates type 2 diabetes-induced cardiomyopathy. Cell Death Dis 2017; 8:e2992. [PMID: 28796243 PMCID: PMC5596567 DOI: 10.1038/cddis.2017.380] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2017] [Revised: 07/04/2017] [Accepted: 07/06/2017] [Indexed: 12/21/2022]
Abstract
Diabetic cardiomyopathy (DCM) is a serious complication of diabetes. Hydrogen sulphide (H2S), a newly found gaseous signalling molecule, has an important role in many regulatory functions. The purpose of this study is to investigate the effects of exogenous H2S on autophagy and its possible mechanism in DCM induced by type II diabetes (T2DCM). In this study, we found that sodium hydrosulphide (NaHS) attenuated the augment in left ventricular (LV) mass and increased LV volume, decreased reactive oxygen species (ROS) production and ameliorated H2S production in the hearts of db/db mice. NaHS facilitated autophagosome content degradation, reduced the expression of P62 (a known substrate of autophagy) and increased the expression of microtubule-associated protein 1 light chain 3 II. It also increased the expression of autophagy-related protein 7 (ATG7) and Beclin1 in db/db mouse hearts. NaHS increased the expression of Kelch-like ECH-associated protein 1 (Keap-1) and reduced the ubiquitylation level in the hearts of db/db mice. 1,4-Dithiothreitol, an inhibitor of disulphide bonds, increased the ubiquitylation level of Keap-1, suppressed the expression of Keap-1 and abolished the effects of NaHS on ubiquitin aggregate clearance and ROS production in H9C2 cells treated with high glucose and palmitate. Overall, we concluded that exogenous H2S promoted ubiquitin aggregate clearance via autophagy, which might exert its antioxidative effect in db/db mouse myocardia. Moreover, exogenous H2S increased Keap-1 expression by suppressing its ubiquitylation, which might have an important role in ubiquitin aggregate clearance via autophagy. Our findings provide new insight into the mechanisms responsible for the antioxidative effects of H2S in the context of T2DCM.
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Affiliation(s)
- Jichao Wu
- Department of Pathophysiology, Harbin Medical University, Harbin 150086, China
| | - Zhiliang Tian
- Department of Pediatrics, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Yu Sun
- Department of Pathophysiology, Harbin Medical University, Harbin 150086, China
| | - Cuicui Lu
- Department of Pharmacy, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, China
| | - Ning Liu
- Department of Pathophysiology, Harbin Medical University, Harbin 150086, China
| | - Zhaopeng Gao
- Department of Pathophysiology, Harbin Medical University, Harbin 150086, China
| | - Linxue Zhang
- Department of Pathophysiology, Harbin Medical University, Harbin 150086, China
| | - Shiyun Dong
- Department of Pathophysiology, Harbin Medical University, Harbin 150086, China
| | - Fan Yang
- Department of Pathophysiology, Harbin Medical University, Harbin 150086, China
| | - Xin Zhong
- Department of Pathophysiology, Harbin Medical University, Harbin 150086, China
| | - Changqing Xu
- Department of Pathophysiology, Harbin Medical University, Harbin 150086, China.,Key Laboratory of Cardiovascular Medicine Research (Harbin Medical University), Ministry of Education, Harbin, China
| | - Fanghao Lu
- Department of Pathophysiology, Harbin Medical University, Harbin 150086, China
| | - Weihua Zhang
- Department of Pathophysiology, Harbin Medical University, Harbin 150086, China.,Key Laboratory of Cardiovascular Medicine Research (Harbin Medical University), Ministry of Education, Harbin, China
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165
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Akhter Y, Thakur S. Targets of ubiquitin like system in mycobacteria and related actinobacterial species. Microbiol Res 2017; 204:9-29. [PMID: 28870295 DOI: 10.1016/j.micres.2017.07.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Revised: 06/22/2017] [Accepted: 07/05/2017] [Indexed: 12/22/2022]
Abstract
Protein turnover and recycling is a prerequisite in all living organisms to maintain normal cellular physiology. Many bacteria are proteasome deficient but they possess typical protease enzymes for carrying out protein turnover. However, several groups of actinobacteria such as mycobacteria harbor both proteasome and proteases. In these bacteria, for cellular protein turnover the target proteins undergo post-translational modification referred as pupylation in which a small protein Pup (prokaryotic ubiquitin-like protein) is tagged to the specific lysine residues of the target proteins and after that those target proteins undergo proteasomal degradation. Thus, Pup serves as a degradation signal, helps in directing proteins toward the bacterial proteasome for a turnover. Although the Pup-proteasome system has a multifaceted role in environmental stresses, pathogenicity and regulation of cellular signaling, but the fate of all types of pupylation such as mono and polypupylation on the proteins is still not completely understood. In this review, we present the mechanisms involved in the activation and conjugation of Pup to the target proteins, describing the structural sketch of pupylation and fundamental differences between the eukaryotic ubiquitin-proteasome and bacterial Pup-proteasome systems. We are also presenting a concise classification and cataloging of the complete battery of experimentally identified Pup-substrates from various species of actinobacteria.
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Affiliation(s)
- Yusuf Akhter
- School of Life Sciences, Central University of Himachal Pradesh, Shahpur, District-Kangra, Himachal Pradesh, 176206, India.
| | - Shweta Thakur
- School of Life Sciences, Central University of Himachal Pradesh, Shahpur, District-Kangra, Himachal Pradesh, 176206, India
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166
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Korovila I, Hugo M, Castro JP, Weber D, Höhn A, Grune T, Jung T. Proteostasis, oxidative stress and aging. Redox Biol 2017; 13:550-567. [PMID: 28763764 PMCID: PMC5536880 DOI: 10.1016/j.redox.2017.07.008] [Citation(s) in RCA: 151] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Revised: 07/04/2017] [Accepted: 07/09/2017] [Indexed: 12/21/2022] Open
Abstract
The production of reactive species is an inevitable by-product of metabolism and thus, life itself. Since reactive species are able to damage cellular structures, especially proteins, as the most abundant macromolecule of mammalian cells, systems are necessary which regulate and preserve a functional cellular protein pool, in a process termed “proteostasis”. Not only the mammalian protein pool is subject of a constant turnover, organelles are also degraded and rebuild. The most important systems for these removal processes are the “ubiquitin-proteasomal system” (UPS), the central proteolytic machinery of mammalian cells, mainly responsible for proteostasis, as well as the “autophagy-lysosomal system”, which mediates the turnover of organelles and large aggregates. Many age-related pathologies and the aging process itself are accompanied by a dysregulation of UPS, autophagy and the cross-talk between both systems. This review will describe the sources and effects of oxidative stress, preservation of cellular protein- and organelle-homeostasis and the effects of aging on proteostasis in mammalian cells.
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Affiliation(s)
- Ioanna Korovila
- Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), 14558 Nuthetal, Germany
| | - Martín Hugo
- Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), 14558 Nuthetal, Germany
| | - José Pedro Castro
- Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), 14558 Nuthetal, Germany; German Center for Diabetes Research (DZD), 85764 Muenchen-Neuherberg, Germany; Faculty of Medicine, Department of Biomedicine, University of Porto, 4200-319, Portugal; Institute for Innovation and Health Research (I3S), Aging and Stress Group, R. Alfredo Allen, 4200-135 Porto, Portugal
| | - Daniela Weber
- Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), 14558 Nuthetal, Germany; NutriAct - Competence Cluster Nutrition Research Berlin-Potsdam, 14558 Nuthetal, Germany
| | - Annika Höhn
- Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), 14558 Nuthetal, Germany; German Center for Diabetes Research (DZD), 85764 Muenchen-Neuherberg, Germany
| | - Tilman Grune
- Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), 14558 Nuthetal, Germany; German Center for Diabetes Research (DZD), 85764 Muenchen-Neuherberg, Germany; German Center for Cardiovascular Research (DZHK), 10117 Berlin, Germany; NutriAct - Competence Cluster Nutrition Research Berlin-Potsdam, 14558 Nuthetal, Germany
| | - Tobias Jung
- Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), 14558 Nuthetal, Germany; German Center for Cardiovascular Research (DZHK), 10117 Berlin, Germany.
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167
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Wu SX, Jiang X, Liu YY, Chen LF, Tao J. EFFECTS AND MECHANISMS OF A NEW MULTIVITAMIN ON CHRONIC METABOLIC SYNDROMES AND AGING. AFRICAN JOURNAL OF TRADITIONAL, COMPLEMENTARY, AND ALTERNATIVE MEDICINES : AJTCAM 2017; 14:52-61. [PMID: 28331914 DOI: 10.21010/ajtcam.v14i1.4256] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
BACKGROUND Increased occurrence of chronic syndromes has prompted researchers to investigate and develop drugs and methods for controlling chronic syndromes with a view to improve human health and reduce early aging. MATERIAL AND METHODS Human trials: After the allotted multivitamin pills or placebo pills had been taken for a stipulated period of about 2 months, the volunteers filled out feedback forms on curative effects of the pills in line with the health examination reports. The effects of the multivitamin on various symptoms or diseases and dysfunctions of the chronic metabolic syndromes were noted and evaluated based on the information provided in forms. Animal experiments: Mouse aging model induced by D-galactose were administered the multivitamin by oral gavage every morning. At the end of the sixth week, activity or content of the components associated with ageing and anti-aging in the brain and liver of the aging mice were determined to investigate the mechanisms of the new multivitamin on chronic metabolic syndromes and aging. RESULTS We found that multivitamin can eliminate or attenuate 38 types of symptoms or dysfunctions of the investigated metabolic syndromes; and that it has both preventive and curative/adjunctive therapeutic effects on the metabolic syndromes. The effects of this multivitamin on components associated with aging and anti-aging were significantly decreased - malondialdehyde content and monoamine oxidase activity but significantly increased activity of superoxide dismutase and glutathione peroxidase. This multivitamin has significant anti-aging effects. CONCLUSION Supplementing with this multivitamin can prevent and provide treatment/adjunctive therapy for these chronic metabolic syndromes and delay the aging process. List of AbbreviationsBWbody weight; Cu/Zn-SOD, cuprum/zinc-superoxide dismutaseMAOmonoamine oxidaseMDAmalondialdehyde; Mn-SOD, manganese-superoxide dismutase; T-SOD, total superoxide dismutase; TP, total protein.
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Affiliation(s)
- Su-Xi Wu
- School of Chemistry and Bioengineering, Changsha University of Science and Technology, Changsha 410004, China
| | - Xuewei Jiang
- School of Chemistry and Bioengineering, Changsha University of Science and Technology, Changsha 410004, China
| | - Yu-Ying Liu
- Department of Health Care, People's Hospital of Hunan Province, Changsha 410004, China
| | - Lin-Feng Chen
- Hospital of Changsha University of Science and Technology, Changsha 410004, China
| | - Jun Tao
- School of Chemistry and Bioengineering, Changsha University of Science and Technology, Changsha 410004, China
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168
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Ishimoto K, Hayase A, Kumagai F, Kawai M, Okuno H, Hino N, Okada Y, Kawamura T, Tanaka T, Hamakubo T, Sakai J, Kodama T, Tachibana K, Doi T. Degradation of human Lipin-1 by BTRC E3 ubiquitin ligase. Biochem Biophys Res Commun 2017; 488:159-164. [PMID: 28483528 DOI: 10.1016/j.bbrc.2017.04.159] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Accepted: 04/18/2017] [Indexed: 10/19/2022]
Abstract
Lipin-1 has dual functions in the regulation of lipid and energy metabolism according to its subcellular localization, which is tightly controlled. However, it is unclear how Lipin-1 degradation is regulated. Here, we demonstrate that Lipin-1 is degraded through its DSGXXS motif. We show that Lipin-1 interacts with either of two E3 ubiquitin ligases, BTRC or FBXW11, and that this interaction is DSGXXS-dependent and mediates the attachment of polyubiquitin chains. Further, we demonstrate that degradation of Lipin-1 is regulated by BTRC in the cytoplasm and on membranes. These novel insights into the regulation of human Lipin-1 stability will be useful in planning further studies to elucidate its metabolic processes.
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Affiliation(s)
- Kenji Ishimoto
- Laboratory of Molecular Medicine, Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan.
| | - Ayaka Hayase
- Laboratory of Molecular Medicine, Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Fumiko Kumagai
- Laboratory of Molecular Medicine, Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Megumi Kawai
- Laboratory of Molecular Medicine, Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Hiroko Okuno
- Laboratory of Molecular Medicine, Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Nobumasa Hino
- Laboratory of Molecular Medicine, Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Yoshiaki Okada
- Laboratory of Molecular Medicine, Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Takeshi Kawamura
- Isotope Science Center, The University of Tokyo, 2-11-16 Yayoi, Bunkyo, Tokyo 113-0032, Japan
| | - Toshiya Tanaka
- Laboratory for System Biology and Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro, Tokyo 153-8904, Japan
| | - Takao Hamakubo
- Department of Quantitative Biology and Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro, Tokyo 153-8904, Japan
| | - Juro Sakai
- Division of Metabolic Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro, Tokyo 153-8904, Japan
| | - Tatsuhiko Kodama
- Laboratory for System Biology and Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro, Tokyo 153-8904, Japan
| | - Keisuke Tachibana
- Laboratory of Molecular Medicine, Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Takefumi Doi
- Laboratory of Molecular Medicine, Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan.
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169
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Rheiner S, Reichel D, Rychahou P, Izumi T, Yang HS, Bae Y. Polymer nanoassemblies with hydrophobic pendant groups in the core induce false positive siRNA transfection in luciferase reporter assays. Int J Pharm 2017. [PMID: 28629980 DOI: 10.1016/j.ijpharm.2017.06.056] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Poly(ethylene glycol)-conjugated polyethylenimine (PEG-PEI) is a widely studied cationic polymer used to develop non-viral vectors for siRNA therapy of genetic disorders including cancer. Cell lines stably expressing luciferase reporter protein typically evaluate the transfection efficacy of siRNA/PEG-PEI complexes, however recent findings revealed that PEG-PEI can reduce luciferase expression independent of siRNA. This study elucidates a cause of the false positive effect in luciferase assays by using polymer nanoassemblies (PNAs) made from PEG, PEI, poly-(l-lysine) (PLL), palmitate (PAL), and deoxycholate (DOC): PEG-PEI (2P), PEG-PEI-PAL (3P), PEG-PLL (2P'), PEG-PLL-PAL (3P'), and PEG-PEI-DOC (2PD). In vitro transfection and western blot assays of luciferase using a colorectal cancer cell line expressing luciferase (HT29/LUC) concluded that 2P and 2P' caused no luciferase expression reduction while hydrophobically modified PNAs induced a 35-50% reduction (3P'<2PD<3P). Although cell viability remained stagnant, 3P triggered cellular stress responses including increased membrane porosity and decreased ATP and cellular protein concentrations. Raman spectroscopy suggested that hydrophobic groups influence PNA conformation changes, which may have caused over-ubiquitination and degradation of luciferase in the cells. These results indicate that hydrophobically modified PEG-PEI induces cellular distress causing over-ubiquitination of the luciferase protein, producing false positive siRNA transfection in the luciferase assay.
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Affiliation(s)
- Steven Rheiner
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, 789 South Limestone, Lexington, KY 40536, USA
| | - Derek Reichel
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, 789 South Limestone, Lexington, KY 40536, USA
| | - Piotr Rychahou
- Markey Cancer Center, University of Kentucky, 800 Rose Street, CC140, Lexington, KY 40536, USA; Department of Surgery, College of Medicine, University of Kentucky, 741 South Limestone, Lexington, KY 40536, USA
| | - Tadahide Izumi
- Department of Toxicology and Cancer Biology, College of Medicine, University of Kentucky, 1095 V.A. Drive, Lexington, KY 40536, USA
| | - Hsin-Sheng Yang
- Markey Cancer Center, University of Kentucky, 800 Rose Street, CC140, Lexington, KY 40536, USA; Department of Toxicology and Cancer Biology, College of Medicine, University of Kentucky, 1095 V.A. Drive, Lexington, KY 40536, USA
| | - Younsoo Bae
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, 789 South Limestone, Lexington, KY 40536, USA.
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170
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González-López L, Carballar-Lejarazú R, Arrevillaga Boni G, Cortés-Martínez L, Cázares-Raga FE, Trujillo-Ocampo A, Rodríguez MH, James AA, Hernández-Hernández FDLC. Lys48 ubiquitination during the intraerythrocytic cycle of the rodent malaria parasite, Plasmodium chabaudi. PLoS One 2017; 12:e0176533. [PMID: 28604779 PMCID: PMC5467854 DOI: 10.1371/journal.pone.0176533] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Accepted: 04/12/2017] [Indexed: 12/26/2022] Open
Abstract
Ubiquitination tags proteins for different functions within the cell. One of the most abundant and studied ubiquitin modification is the Lys48 polyubiquitin chain that modifies proteins for their destruction by proteasome. In Plasmodium is proposed that post-translational regulation is fundamental for parasite development during its complex life-cycle; thus, the objective of this work was to analyze the ubiquitination during Plasmodium chabaudi intraerythrocytic stages. Ubiquitinated proteins were detected during intraerythrocytic stages of Plasmodium chabaudi by immunofluorescent microscopy, bidimensional electrophoresis (2-DE) combined with immunoblotting and mass spectrometry. All the studied stages presented protein ubiquitination and Lys48 polyubiquitination with more abundance during the schizont stage. Three ubiquitinated proteins were identified for rings, five for trophozoites and twenty for schizonts. Only proteins detected with a specific anti- Lys48 polyubiquitin antibody were selected for Mass Spectrometry analysis and two of these identified proteins were selected in order to detect the specific amino acid residues where ubiquitin is placed. Ubiquitinated proteins during the ring and trophozoite stages were related with the invasion process and in schizont proteins were related with nucleic acid metabolism, glycolysis and protein biosynthesis. Most of the ubiquitin detection was during the schizont stage and the Lys48 polyubiquitination during this stage was related to proteins that are expected to be abundant during the trophozoite stage. The evidence that these Lys48 polyubiquitinated proteins are tagged for destruction by the proteasome complex suggests that this type of post-translational modification is important in the regulation of protein abundance during the life-cycle and may also contribute to the parasite cell-cycle progression.
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Affiliation(s)
- Lorena González-López
- Departamento de Infectómica y Patogénesis Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV-IPN), México, D.F., México
| | - Rebeca Carballar-Lejarazú
- Departamento de Infectómica y Patogénesis Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV-IPN), México, D.F., México
- Departments of Molecular Biology & Biochemistry and Microbiology & Molecular Genetics, University of California, Irvine, California, United States of America
| | - Gerardo Arrevillaga Boni
- Departamento de Biomedicina Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV-IPN), México, D.F., México
| | - Leticia Cortés-Martínez
- Departamento de Infectómica y Patogénesis Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV-IPN), México, D.F., México
| | - Febe Elena Cázares-Raga
- Departamento de Infectómica y Patogénesis Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV-IPN), México, D.F., México
| | - Abel Trujillo-Ocampo
- Departamento de Infectómica y Patogénesis Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV-IPN), México, D.F., México
| | - Mario H. Rodríguez
- Centro de Investigación Sobre Enfermedades Infecciosas, Instituto Nacional de Salud Pública, Cuernavaca, Morelos, México
| | - Anthony A. James
- Departments of Molecular Biology & Biochemistry and Microbiology & Molecular Genetics, University of California, Irvine, California, United States of America
| | - Fidel de la Cruz Hernández-Hernández
- Departamento de Infectómica y Patogénesis Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV-IPN), México, D.F., México
- * E-mail:
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171
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Kuhlmann NJ, Chien P. Selective adaptor dependent protein degradation in bacteria. Curr Opin Microbiol 2017; 36:118-127. [PMID: 28458096 DOI: 10.1016/j.mib.2017.03.013] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 03/12/2017] [Accepted: 03/29/2017] [Indexed: 11/30/2022]
Abstract
Energy dependent proteolysis is essential for all life, but uncontrolled degradation leads to devastating consequences. In bacteria, oligomeric AAA+ proteases are responsible for controlling protein destruction and are regulated in part by adaptor proteins. Adaptors are regulatory factors that shape protease substrate choice by either restricting or enhancing substrate recognition in several ways. In some cases, protease activity or assembly itself requires adaptor binding. Adaptors can also alter specificity by acting as scaffolds to tether particular substrates to already active proteases. Finally, hierarchical assembly of adaptors can use combinations of several activities to enhance the protease's selectivity. Because the lifetime of the constituent proteins directly affects the duration of a particular signaling pathway, regulated proteolysis impacts almost all cellular responses. In this review, we describe recent progress in regulated protein degradation, focusing on fundamental principles of adaptors and how they perform critical biological functions, such as promoting cell cycle progression and quality control.
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Affiliation(s)
- Nathan J Kuhlmann
- Molecular and Cellular Biology Graduate Program, University of Massachusetts, Amherst, United States
| | - Peter Chien
- Molecular and Cellular Biology Graduate Program, University of Massachusetts, Amherst, United States; Department of Biochemistry and Molecular Biology, University of Massachusetts, Amherst, United States.
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172
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Valenzuela R, Echeverria F, Ortiz M, Rincón-Cervera MÁ, Espinosa A, Hernandez-Rodas MC, Illesca P, Valenzuela A, Videla LA. Hydroxytyrosol prevents reduction in liver activity of Δ-5 and Δ-6 desaturases, oxidative stress, and depletion in long chain polyunsaturated fatty acid content in different tissues of high-fat diet fed mice. Lipids Health Dis 2017; 16:64. [PMID: 28395666 PMCID: PMC5387240 DOI: 10.1186/s12944-017-0450-5] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2017] [Accepted: 03/09/2017] [Indexed: 12/28/2022] Open
Abstract
Background Eicosapentaenoic acid (EPA, C20:5n-3), docosahexaenoic acid (DHA, C22:6n-3) and arachidonic acid (AA, C20:4n-6) are long-chain polyunsaturated fatty acids (LCPUFAs) with relevant roles in the organism. EPA and DHA are synthesized from the precursor alpha-linolenic acid (ALA, C18:3n-3), whereas AA is produced from linoleic acid (LA, C18:2n-6) through the action of Δ5 and Δ6-desaturases. High-fat diet (HFD) decreases the activity of both desaturases and LCPUFA accretion in liver and other tissues. Hydroxytyrosol (HT), a natural antioxidant, has an important cytoprotective effects in different cells and tissues. Methods Male mice C57BL/6 J were fed a control diet (CD) (10% fat, 20% protein, 70% carbohydrates) or a HFD (60% fat, 20% protein, 20% carbohydrates) for 12 weeks. Animals were daily supplemented with saline (CD) or 5 mg HT (HFD), and blood and the studied tissues were analyzed after the HT intervention. Parameters studied included liver histology (optical microscopy), activity of hepatic desaturases 5 and 6 (gas-liquid chromatography of methyl esters derivatives) and antioxidant enzymes (catalase, superoxide dismutase, glutathione peroxidase, and glutathione reductase by spectrophotometry), oxidative stress indicators (glutathione, thiobarbituric acid reactants, and the antioxidant capacity of plasma), gene expression assays for sterol regulatory element-binding protein 1c (SREBP-1c) (qPCR and ELISA), and LCPUFA profiles in liver, erythrocyte, brain, heart, and testicle (gas-liquid chromatography). Results HFD led to insulin resistance and liver steatosis associated with SREBP-1c upregulation, with enhancement in plasma and liver oxidative stress status and diminution in the synthesis and storage of n-6 and n-3 LCPUFAs in the studied tissues, compared to animals given control diet. HT supplementation significantly reduced fat accumulation in liver and plasma as well as tissue metabolic alterations induced by HFD. Furthermore, a normalization of desaturase activities, oxidative stress-related parameters, and tissue n-3 LCPUFA content was observed in HT-treated rats over control animals. Conclusions HT supplementation prevents metabolic alterations in desaturase activities, oxidative stress status, and n-3 LCPUFA content in the liver and extrahepatic tissues of mice fed HFD. Electronic supplementary material The online version of this article (doi:10.1186/s12944-017-0450-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Rodrigo Valenzuela
- Nutrition Department, Faculty of Medicine, University of Chile, Independencia 1027, Casilla, 70000, Santiago 7, Chile. .,Lipid Center, Institute of Nutrition and Food Technology (INTA), University of Chile, Santiago, Chile.
| | - Francisca Echeverria
- Nutrition Department, Faculty of Medicine, University of Chile, Independencia 1027, Casilla, 70000, Santiago 7, Chile
| | - Macarena Ortiz
- Nutrition Department, Faculty of Medicine, University of Chile, Independencia 1027, Casilla, 70000, Santiago 7, Chile
| | | | - Alejandra Espinosa
- Medical Technology Department, Faculty of Medicine, University of Chile, Santiago, Chile
| | | | - Paola Illesca
- Biochemistry Department. Faculty of Biochemistry, University of Litoral, Santa Fe, Argentina
| | - Alfonso Valenzuela
- Lipid Center, Institute of Nutrition and Food Technology (INTA), University of Chile, Santiago, Chile
| | - Luis A Videla
- Molecular and Clinical Pharmacology Program, Institute of Biomedical Science, Faculty of Medicine, University of Chile, Santiago, Chile
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Xing T, Wang C, Zhao X, Dai C, Zhou G, Xu X. Proteome Analysis Using Isobaric Tags for Relative and Absolute Analysis Quantitation (iTRAQ) Reveals Alterations in Stress-Induced Dysfunctional Chicken Muscle. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:2913-2922. [PMID: 28304171 DOI: 10.1021/acs.jafc.6b05835] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The current study was designed to investigate changes in the protein profiles of pale, soft, and exudative (PSE)-like muscles of broilers subjected to transportation under high-temperature conditions, using isobaric tags for relative and absolute analysis quantitation (iTRAQ). Arbor Acres chickens (n = 112) were randomly divided into two treatments: unstressed control (CON) and 0.5 h of transport (T). Birds were transported according to a designed protocol. Pectoralis major (PM) muscle samples in the T group were collected and classified as normal (T-NOR) or PSE-like (T-PSE). Plasma activities of stress indicators, muscle microstructure, and proteome were measured. Results indicated that broilers in the T-PSE group exhibited higher activities of plasma stress indicators. The microstructure of T-PSE group showed a looser network and larger intercellular spaces in comparison to the other groups. Proteomic analysis, based on iTRAQ, revealed 29 differentially expressed proteins in the T-NOR and T-PSE groups that were involved in protein turnover, signal transduction, stress and defense, calcium handling, cell structure, and metabolism. In particular, proteins relating to the glycolysis pathway, calcium signaling, and molecular chaperones exhibited significant differences that may contribute to the inferior post-mortem meat quality. Overall, the proteomic results provide a further understanding of the mechanism of meat quality changes in response to stress.
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Affiliation(s)
- Tong Xing
- Key Laboratory of Meat Processing and Quality Control, Ministry of Education, Synergetic Innovation Center of Food Safety and Nutrition, College of Food Science and Technology, Nanjing Agricultural University , Nanjing 210095, China
| | - Chong Wang
- Key Laboratory of Meat Processing and Quality Control, Ministry of Education, Synergetic Innovation Center of Food Safety and Nutrition, College of Food Science and Technology, Nanjing Agricultural University , Nanjing 210095, China
| | - Xue Zhao
- Key Laboratory of Meat Processing and Quality Control, Ministry of Education, Synergetic Innovation Center of Food Safety and Nutrition, College of Food Science and Technology, Nanjing Agricultural University , Nanjing 210095, China
| | - Chen Dai
- Experimental Teaching Center of Life Science, Nanjing Agricultural University , Nanjing 210095, People's Republic of China
| | - Guanghong Zhou
- Key Laboratory of Meat Processing and Quality Control, Ministry of Education, Synergetic Innovation Center of Food Safety and Nutrition, College of Food Science and Technology, Nanjing Agricultural University , Nanjing 210095, China
| | - Xinglian Xu
- Key Laboratory of Meat Processing and Quality Control, Ministry of Education, Synergetic Innovation Center of Food Safety and Nutrition, College of Food Science and Technology, Nanjing Agricultural University , Nanjing 210095, China
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174
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Graham SH, Liu H. Life and death in the trash heap: The ubiquitin proteasome pathway and UCHL1 in brain aging, neurodegenerative disease and cerebral Ischemia. Ageing Res Rev 2017; 34:30-38. [PMID: 27702698 DOI: 10.1016/j.arr.2016.09.011] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Revised: 09/08/2016] [Accepted: 09/29/2016] [Indexed: 12/11/2022]
Abstract
The ubiquitin proteasome pathway (UPP) is essential for removing abnormal proteins and preventing accumulation of potentially toxic proteins within the neuron. UPP dysfunction occurs with normal aging and is associated with abnormal accumulation of protein aggregates within neurons in neurodegenerative diseases. Ischemia disrupts UPP function and thus may contribute to UPP dysfunction seen in the aging brain and in neurodegenerative diseases. Ubiquitin carboxy-terminal hydrolase L1 (UCHL1), an important component of the UPP in the neuron, is covalently modified and its activity inhibited by reactive lipids produced after ischemia. As a result, degradation of toxic proteins is impaired which may exacerbate neuronal function and cell death in stroke and neurodegenerative diseases. Preserving or restoring UCHL1 activity may be an effective therapeutic strategy in stroke and neurodegenerative diseases.
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175
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Mc Auley MT, Guimera AM, Hodgson D, Mcdonald N, Mooney KM, Morgan AE, Proctor CJ. Modelling the molecular mechanisms of aging. Biosci Rep 2017; 37:BSR20160177. [PMID: 28096317 PMCID: PMC5322748 DOI: 10.1042/bsr20160177] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Revised: 12/15/2016] [Accepted: 01/16/2017] [Indexed: 01/09/2023] Open
Abstract
The aging process is driven at the cellular level by random molecular damage that slowly accumulates with age. Although cells possess mechanisms to repair or remove damage, they are not 100% efficient and their efficiency declines with age. There are many molecular mechanisms involved and exogenous factors such as stress also contribute to the aging process. The complexity of the aging process has stimulated the use of computational modelling in order to increase our understanding of the system, test hypotheses and make testable predictions. As many different mechanisms are involved, a wide range of models have been developed. This paper gives an overview of the types of models that have been developed, the range of tools used, modelling standards and discusses many specific examples of models that have been grouped according to the main mechanisms that they address. We conclude by discussing the opportunities and challenges for future modelling in this field.
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Affiliation(s)
- Mark T Mc Auley
- Faculty of Science and Engineering, University of Chester, Chester, U.K
| | - Alvaro Martinez Guimera
- MRC/Arthritis Research UK Centre for Musculoskeletal Ageing (CIMA), Newcastle University, Newcastle upon Tyne, Ormskirk, U.K
- Institute for Cell and Molecular Biosciences, Newcastle University, Newcastle upon Tyne, U.K
| | - David Hodgson
- MRC/Arthritis Research UK Centre for Musculoskeletal Ageing (CIMA), Newcastle University, Newcastle upon Tyne, Ormskirk, U.K
- Musculoskeletal Research Group, Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, U.K
| | - Neil Mcdonald
- MRC/Arthritis Research UK Centre for Musculoskeletal Ageing (CIMA), Newcastle University, Newcastle upon Tyne, Ormskirk, U.K
- Institute for Cell and Molecular Biosciences, Newcastle University, Newcastle upon Tyne, U.K
| | | | - Amy E Morgan
- Faculty of Science and Engineering, University of Chester, Chester, U.K
| | - Carole J Proctor
- MRC/Arthritis Research UK Centre for Musculoskeletal Ageing (CIMA), Newcastle University, Newcastle upon Tyne, Ormskirk, U.K.
- Musculoskeletal Research Group, Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, U.K
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176
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Zhang S, Eitan E, Mattson MP. Early involvement of lysosome dysfunction in the degeneration of cerebral cortical neurons caused by the lipid peroxidation product 4-hydroxynonenal. J Neurochem 2017; 140:941-954. [PMID: 28095639 DOI: 10.1111/jnc.13957] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 01/06/2017] [Accepted: 01/09/2017] [Indexed: 12/21/2022]
Abstract
Free radical-mediated oxidative damage to proteins, lipids, and DNA occurs in neurons during acute brain injuries and in neurodegenerative disorders. Membrane lipid peroxidation contributes to neuronal dysfunction and death, in part by disrupting neuronal ion homeostasis and cellular bioenergetics. Emerging findings suggest that 4-hydroxynonenal (HNE), an aldehyde produced during lipid peroxidation, impairs the function of various proteins involved in neuronal homeostasis. Here we tested the hypothesis that HNE impairs the cellular system that removes damaged proteins and organelles, the autophagy-lysosome pathway in rat primary cortical neurons. We found that HNE, at a concentration that causes apoptosis over a 48-72 h period, increases protein levels of LC3 II and p62 and within 1 and 4 h of exposure, respectively; LC3 II and p62 immunoreactive puncta were observed in the cytoplasm of HNE-treated neurons at 6 h. The extent of up-regulation of p62 and LC3 II in response to HNE was not affected by co-treatment with the lysosome inhibitor bafilomycin A1, suggesting that the effects of HNE on autophagy were secondary to lysosome inhibition. Indeed, we found that neurons exposed to HNE exhibit elevated pH levels, and decreased protein substrate hydrolysis and cathepsin B activity. Neurons exposed to HNE also exhibited the accumulation of K63-linked polyubiquitinated proteins, which are substrates targeted for lysosomal degradation. Moreover, we found that the levels of LAMP2a and constitutively active heat-shock protein 70, and numbers of LAMP2a-positive lysosomes, are decreased in neurons exposed to HNE. Our findings demonstrate that the lipid peroxidation product HNE causes early impairment of lysosomes which may contribute to the accumulation of damaged and dysfunctional proteins and organelles and consequent neuronal death. Because impaired lysosome function is increasingly recognized as an early event in the neuronal death that occurs in neurodegenerative disorders, our findings suggest a role for HNE in such lysosomal dysfunction.
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Affiliation(s)
- Shi Zhang
- Laboratory of Neurosciences, National Institute on Aging Intramural Research Program, Baltimore, Maryland, USA
| | - Erez Eitan
- Laboratory of Neurosciences, National Institute on Aging Intramural Research Program, Baltimore, Maryland, USA
| | - Mark P Mattson
- Laboratory of Neurosciences, National Institute on Aging Intramural Research Program, Baltimore, Maryland, USA.,Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
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177
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Zhang W, Che Q, Tan H, Qi X, Li J, Li D, Gu Q, Zhu T, Liu M. Marine Streptomyces sp. derived antimycin analogues suppress HeLa cells via depletion HPV E6/E7 mediated by ROS-dependent ubiquitin-proteasome system. Sci Rep 2017; 7:42180. [PMID: 28176847 PMCID: PMC5296914 DOI: 10.1038/srep42180] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Accepted: 01/06/2017] [Indexed: 12/26/2022] Open
Abstract
Four new antimycin alkaloids (1–4) and six related known analogs (5–10) were isolated from the culture of a marine derived Streptomyces sp. THS-55, and their structures were elucidated by extensive spectroscopic analysis. All of the compounds exhibited potent cytotoxicity in vitro against HPV-transformed HeLa cell line. Among them, compounds 6–7 were derived as natural products for the first time, and compound 5 (NADA) showed the highest potency. NADA inhibited the proliferation, arrested cell cycle distribution, and triggered apoptosis in HeLa cancer cells. Our molecular mechanic studies revealed NADA degraded the levels of E6/E7 oncoproteins through ROS-mediated ubiquitin-dependent proteasome system activation. This is the first report that demonstrates antimycin alkaloids analogue induces the degradation of high-risk HPV E6/E7 oncoproteins and finally induces apoptosis in cervical cancer cells. The present work suggested that these analogues could serve as lead compounds for the development of HPV-infected cervical cancer therapeutic agents, as well as research tools for the study of E6/E7 functions.
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Affiliation(s)
- Weiyi Zhang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China
| | - Qian Che
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China.,Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, 266237, People's Republic of China
| | - Hongsheng Tan
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China
| | - Xin Qi
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China.,Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, 266237, People's Republic of China
| | - Jing Li
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China.,Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, 266237, People's Republic of China
| | - Dehai Li
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China.,Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, 266237, People's Republic of China
| | - Qianqun Gu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China.,Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, 266237, People's Republic of China
| | - Tianjiao Zhu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China.,Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, 266237, People's Republic of China
| | - Ming Liu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China.,Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, 266237, People's Republic of China
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178
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Roberty S, Furla P, Plumier JC. Differential antioxidant response between two Symbiodinium species from contrasting environments. PLANT, CELL & ENVIRONMENT 2016; 39:2713-2724. [PMID: 27577027 DOI: 10.1111/pce.12825] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Revised: 08/22/2016] [Accepted: 08/24/2016] [Indexed: 06/06/2023]
Abstract
High sea surface temperature accompanied by high levels of solar irradiance is responsible for the disruption of the symbiosis between cnidarians and their symbiotic dinoflagellates from the genus Symbiodinium. This phenomenon, known as coral bleaching, is one of the major threats affecting coral reefs around the world. Because an important molecular trigger to bleaching appears related to the production of reactive oxygen species (ROS), it is critical to understand the function of the antioxidant network of Symbiodinium species. In this study we investigated the response of two Symbiodinium species, from contrasting environments, to a chemically induced oxidative stress. ROS produced during this oxidative burst reduced photosynthesis by 30 to 50% and significantly decreased the activity of superoxide dismutase. Lipid peroxidation levels and carotenoid concentrations, especially diatoxanthin, confirm that these molecules act as antioxidants and contribute to the stabilization of membrane lipids. The comparative analysis between the two Symbiodinium species allowed us to highlight that Symbiodinium sp. clade A temperate was more tolerant to oxidative stress than the tropical S. kawagutii clade F. These differences are very likely a consequence of adaptation to their natural environment, with the temperate species experiencing conditions of temperature and irradiance much more variable and extreme.
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Affiliation(s)
- S Roberty
- Université de Liège, InBioS - Animal Physiology, Département de Biologie, Ecologie et Evolution, 4 Chemin de la Vallée, B-4000, Liège, Belgium
| | - P Furla
- Université Nice Sophia Antipolis, UMR 7138'Evolution Paris Seine', équipe 'Symbiose marine', 06108, Nice Cedex 02, France
- Université Pierre-et-Marie-Curie, UMR 7138 'Evolution Paris Seine', 7, quai Saint-Bernard, 75252, Paris cedex 05, France
- CNRS, UMR 7138 'Evolution Paris Seine', 7, quai Saint-Bernard, 75252, Paris cedex 05, France
| | - J-C Plumier
- Université de Liège, InBioS - Animal Physiology, Département de Biologie, Ecologie et Evolution, 4 Chemin de la Vallée, B-4000, Liège, Belgium
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179
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Abstract
SIGNIFICANCE Since the metabolic syndrome (MS) and pathologies associated with/resulting from metabolic dysregulations became a worldwide spreading and growing problem, the mechanisms mediating the according cellular changes got into a focus of interest. The ubiquitin-proteasomal system (UPS) is the main regulator of both the functional and dysfunctional protein pool of (not only) mammalian cells-thus, it is obvious that an impact on this system may also affect cellular functionality that directly depends on permanent regulation/adaption of the cell's proteostasis. However, the according research is still at the beginning. Recent Advances: It was also recently shown that maintaining a highly functional UPS positively correlates with increased health or even life span, thus modulation or restoration of UPS function may be an effective approach alleviating or even preventing MS detrimental consequences. CRITICAL ISSUES Even if many consequences of metabolic dysregulation such as a slight but chronic redox shift to a more oxidative state (i.e., a low-grade systemic inflammation that increases reactive oxygen species formation, lipid peroxidation, protein oxidation, formation of advanced glycation end products, glycosylation, S-glutathionylation, redox shifts, endoplasmic reticulum stress, unfolded protein response, expression of transcription factors, and release of cytokines) are already known to affect the highly redox-regulated UPS, experimental data about UPS changes that are directly mediated by glucotoxic and/or lipotoxic stress are still rarely published. FUTURE DIRECTIONS It may be taken into account that many MS-related pathologic changes result from UPS dysfunction or dysregulation. In this review, the main interface between MS effects and their impact on the UPS are highlighted since they may direct to new therapeutic approaches. Antioxid. Redox Signal. 25, 902-917.
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Affiliation(s)
- Annika Höhn
- 1 Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE) , Nuthetal, Germany .,2 German Center for Diabetes Research (DZD) , Neuherberg, Germany
| | - Jeannette König
- 1 Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE) , Nuthetal, Germany
| | - Tobias Jung
- 1 Department of Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE) , Nuthetal, Germany
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180
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Zhang H, Forman HJ. Signaling by 4-hydroxy-2-nonenal: Exposure protocols, target selectivity and degradation. Arch Biochem Biophys 2016; 617:145-154. [PMID: 27840096 DOI: 10.1016/j.abb.2016.11.003] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Revised: 10/20/2016] [Accepted: 11/09/2016] [Indexed: 01/26/2023]
Abstract
4-hydroxy-2-nonenal (HNE), a major non-saturated aldehyde product of lipid peroxidation, has been extensively studied as a signaling messenger. In these studies a wide range of HNE concentrations have been used, ranging from the unstressed plasma concentration to far beyond what would be found in actual pathophysiological condition. In addition, accumulating evidence suggest that signaling protein modification by HNE is specific with only those proteins with cysteine, histidine, and lysine residues located in certain sequence or environments adducted by HNE. HNE-signaling is further regulated through the turnover of HNE-signaling protein adducts through proteolytic process that involve proteasomes, lysosomes and autophagy. This review discusses the HNE concentrations and exposure modes used in signaling studies, the selectivity of the HNE-adduction site, and the turnover of signaling protein adducts.
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Affiliation(s)
- Hongqiao Zhang
- Andrus Gerontology Center of the Leonard Davis School of Gerontology, University of Southern California, 3715 McClintock Ave, Los Angeles, CA 90089-0191, USA.
| | - Henry Jay Forman
- Andrus Gerontology Center of the Leonard Davis School of Gerontology, University of Southern California, 3715 McClintock Ave, Los Angeles, CA 90089-0191, USA
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181
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182
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Feuer S, Liu X, Donjacour A, Simbulan R, Maltepe E, Rinaudo P. Common and specific transcriptional signatures in mouse embryos and adult tissues induced by in vitro procedures. Reproduction 2016; 153:REP-16-0473. [PMID: 27799627 PMCID: PMC5411347 DOI: 10.1530/rep-16-0473] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Accepted: 10/26/2016] [Indexed: 12/17/2022]
Abstract
Stressful environmental exposures incurred early in development can affect postnatal metabolic health and susceptibility to non-communicable diseases in adulthood, although the molecular mechanisms by which this occurs have yet to be elucidated. Here we use a mouse model to investigate how assorted in vitro exposures restricted exclusively to the preimplantation period affect transcription both acutely in embryos and long-term in subsequent offspring adult tissues, to determine if reliable transcriptional markers of in vitro stress are present at specific developmental time points and throughout development. Each in vitro fertilization or embryo culture environment led to a specific and unique blastocyst transcriptional profile, but we identified a common 18-gene and 9-pathway signature of preimplantation embryo manipulation that was present in all in vitro embryos irrespective of culture condition or method of fertilization. This fingerprint did not persist throughout development and there was no clear transcriptional cohesion between adult IVF offspring tissues or compared to their preceding embryos, indicating a tissue-specific impact of in vitro stress on gene expression. However, the transcriptional changes present in each IVF tissue were targeted by the same upstream transcriptional regulators, which provide insight as to how acute transcriptional responses to stressful environmental exposures might be preserved throughout development to influence adult gene expression.
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Affiliation(s)
- Sky Feuer
- S Feuer, Obstetrics and Gynecology, University of California, San Francisco, San Francisco, United States
| | - Xiaowei Liu
- X Liu, Obstetrics and Gynecology, University of California, San Francisco, San Francisco, United States
| | - Annemarie Donjacour
- A Donjacour, Obstetrics and Gynecology, University of California, San Francisco, San Francisco, United States
| | - Rhodel Simbulan
- R Simbulan, Obstetrics and Gynecology, University of California, San Francisco, San Francisco, United States
| | - Emin Maltepe
- E Maltepe, Obstetrics and Gynecology, University of California, San Francisco, San Francisco, United States
| | - Paolo Rinaudo
- P Rinaudo, Obstetrics and Gynecology, University of California, San Francisco, San Francisco, 94115, United States
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183
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Subnormothermic Perfusion in the Isolated Rat Liver Preserves the Antioxidant Glutathione and Enhances the Function of the Ubiquitin Proteasome System. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2016; 2016:9324692. [PMID: 27800122 PMCID: PMC5075307 DOI: 10.1155/2016/9324692] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Revised: 09/09/2016] [Accepted: 09/15/2016] [Indexed: 12/18/2022]
Abstract
The reduction of oxidative stress is suggested to be one of the main mechanisms to explain the benefits of subnormothermic perfusion against ischemic liver damage. In this study we investigated the early cellular mechanisms induced in isolated rat livers after 15 min perfusion at temperatures ranging from normothermia (37°C) to subnormothermia (26°C and 22°C). Subnormothermic perfusion was found to maintain hepatic viability. Perfusion at 22°C raised reduced glutathione levels and the activity of glutathione reductase; however, lipid and protein oxidation still occurred as determined by malondialdehyde, 4-hydroxynonenal-protein adducts, and advanced oxidation protein products. In livers perfused at 22°C the lysosomal and ubiquitin proteasome system (UPS) were both activated. The 26S chymotrypsin-like (β5) proteasome activity was significantly increased in the 26°C (46%) and 22°C (42%) groups. The increased proteasome activity may be due to increased Rpt6 Ser120 phosphorylation, which is known to enhance 26S proteasome activity. Together, our results indicate that the early events produced by subnormothermic perfusion in the liver can induce oxidative stress concomitantly with antioxidant glutathione preservation and enhanced function of the lysosomal and UPS systems. Thus, a brief hypothermia could trigger antioxidant mechanisms and may be functioning as a preconditioning stimulus.
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184
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Palumbo R, Gogliettino M, Cocca E, Iannitti R, Sandomenico A, Ruvo M, Balestrieri M, Rossi M, Palmieri G. APEH Inhibition Affects Osteosarcoma Cell Viability via Downregulation of the Proteasome. Int J Mol Sci 2016; 17:ijms17101614. [PMID: 27669226 PMCID: PMC5085647 DOI: 10.3390/ijms17101614] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Revised: 09/08/2016] [Accepted: 09/19/2016] [Indexed: 01/13/2023] Open
Abstract
The proteasome is a multienzymatic complex that controls the half-life of the majority of intracellular proteins, including those involved in apoptosis and cell-cycle progression. Recently, proteasome inhibition has been shown to be an effective anticancer strategy, although its downregulation is often accompanied by severe undesired side effects. We previously reported that the inhibition of acylpeptide hydrolase (APEH) by the peptide SsCEI 4 can significantly affect the proteasome activity in A375 melanoma or Caco-2 adenocarcinoma cell lines, thus shedding new light on therapeutic strategies based on downstream regulation of proteasome functions. In this work, we investigated the functional correlation between APEH and proteasome in a panel of cancer cell lines, and evaluated the cell proliferation upon SsCEI 4-treatments. Results revealed that SsCEI 4 triggered a proliferative arrest specifically in osteosarcoma U2OS cells via downregulation of the APEH–proteasome system, with the accumulation of the typical hallmarks of proteasome: NF-κB, p21Waf1, and polyubiquitinylated proteins. We found that the SsCEI 4 anti-proliferative effect involved a senescence-like growth arrest without noticeable cytotoxicity. These findings represent an important step toward understanding the mechanism(s) underlying the APEH-mediated downregulation of proteasome in order to design new molecules able to efficiently regulate the proteasome system for alternative therapeutic strategies.
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Affiliation(s)
- Rosanna Palumbo
- Institute of Biostructure and Bioimaging, National Research Council (CNR-IBB), Napoli 80134, Italy.
| | - Marta Gogliettino
- Institute of Biosciences and BioResources, National Research Council (CNR-IBBR), Napoli 80131, Italy.
| | - Ennio Cocca
- Institute of Biosciences and BioResources, National Research Council (CNR-IBBR), Napoli 80131, Italy.
| | - Roberta Iannitti
- Institute of Biostructure and Bioimaging, National Research Council (CNR-IBB), Napoli 80134, Italy.
| | - Annamaria Sandomenico
- Institute of Biostructure and Bioimaging, National Research Council (CNR-IBB), Napoli 80134, Italy.
| | - Menotti Ruvo
- Institute of Biostructure and Bioimaging, National Research Council (CNR-IBB), Napoli 80134, Italy.
| | - Marco Balestrieri
- Institute of Biosciences and BioResources, National Research Council (CNR-IBBR), Napoli 80131, Italy.
| | - Mosè Rossi
- Institute of Biosciences and BioResources, National Research Council (CNR-IBBR), Napoli 80131, Italy.
| | - Gianna Palmieri
- Institute of Biosciences and BioResources, National Research Council (CNR-IBBR), Napoli 80131, Italy.
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185
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Capasso S, Alessio N, Squillaro T, Di Bernardo G, Melone MA, Cipollaro M, Peluso G, Galderisi U. Changes in autophagy, proteasome activity and metabolism to determine a specific signature for acute and chronic senescent mesenchymal stromal cells. Oncotarget 2016; 6:39457-68. [PMID: 26540573 DOI: 10.18632/oncotarget.6277] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Accepted: 10/02/2015] [Indexed: 12/11/2022] Open
Abstract
A sharp definition of what a senescent cell is still lacking since we do not have in depth understanding of mechanisms that induce cellular senescence. In addition, senescent cells are heterogeneous, in that not all of them express the same genes and present the same phenotype. To further clarify the classification of senescent cells, hints may be derived by the study of cellular metabolism, autophagy and proteasome activity. In this scenario, we decided to study these biological features in senescence of Mesenchymal Stromal Cells (MSC). These cells contain a subpopulation of stem cells that are able to differentiate in mesodermal derivatives (adipocytes, chondrocytes, osteocytes). In addition, they can also contribute to the homeostatic maintenance of many organs, hence, their senescence could be very deleterious for human body functions. We induced MSC senescence by oxidative stress, doxorubicin treatment, X-ray irradiation and replicative exhaustion. The first three are considered inducers of acute senescence while extensive proliferation triggers replicative senescence also named as chronic senescence. In all conditions, but replicative and high IR dose senescence, we detected a reduction of the autophagic flux, while proteasome activity was impaired in peroxide-treated and irradiated cells. Differences were observed also in metabolic status. In general, all senescent cells evidenced metabolic inflexibility and prefer to use glucose as energy fuel. Irradiated cells with low dose of X-ray and replicative senescent cells show a residual capacity to use fatty acids and glutamine as alternative fuels, respectively. Our study may be useful to discriminate among different senescent phenotypes.
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Affiliation(s)
- Stefania Capasso
- Department of Experimental Medicine, Biotechnology and Molecular Biology Section, Second University of Naples, Naples, Italy
| | - Nicola Alessio
- Department of Experimental Medicine, Biotechnology and Molecular Biology Section, Second University of Naples, Naples, Italy
| | - Tiziana Squillaro
- Department of Experimental Medicine, Biotechnology and Molecular Biology Section, Second University of Naples, Naples, Italy
| | - Giovanni Di Bernardo
- Department of Experimental Medicine, Biotechnology and Molecular Biology Section, Second University of Naples, Naples, Italy
| | - Mariarosa A Melone
- Institute of Bioscience and Bioresources, CNR, Naples, Italy.,Department of Clinical and Experimental Medicine and Surgery, Division of Neurology, Second University of Naples, Naples, Italy
| | - Marilena Cipollaro
- Department of Experimental Medicine, Biotechnology and Molecular Biology Section, Second University of Naples, Naples, Italy
| | | | - Umberto Galderisi
- Sbarro Institute for Cancer Research and Molecular Medicine, Center for Biotechnology, Temple University, Philadelphia, PA, USA.,Department of Experimental Medicine, Biotechnology and Molecular Biology Section, Second University of Naples, Naples, Italy.,Institute of Bioscience and Bioresources, CNR, Naples, Italy
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186
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Effects of heterologous expression of human cyclic nucleotide phosphodiesterase 3A (hPDE3A) on redox regulation in yeast. Biochem J 2016; 473:4205-4225. [PMID: 27647936 DOI: 10.1042/bcj20160572] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Revised: 09/07/2016] [Accepted: 09/19/2016] [Indexed: 01/11/2023]
Abstract
Oxidative stress plays a pivotal role in pathogenesis of cardiovascular diseases and diabetes; however, the roles of protein kinase A (PKA) and human phosphodiesterase 3A (hPDE3A) remain unknown. Here, we show that yeast expressing wild-type (WT) hPDE3A or K13R hPDE3A (putative ubiquitinylation site mutant) exhibited resistance or sensitivity to exogenous hydrogen peroxide (H2O2), respectively. H2O2-stimulated ROS production was markedly increased in yeast expressing K13R hPDE3A (Oxidative stress Sensitive 1, OxiS1), compared with yeast expressing WT hPDE3A (Oxidative stress Resistant 1, OxiR1). In OxiR1, YAP1 and YAP1-dependent antioxidant genes were up-regulated, accompanied by a reduction in thioredoxin peroxidase. In OxiS1, expression of YAP1 and YAP1-dependent genes was impaired, and the thioredoxin system malfunctioned. H2O2 increased cyclic adenosine monophosphate (cAMP)-hydrolyzing activity of WT hPDE3A, but not K13R hPDE3A, through PKA-dependent phosphorylation of hPDE3A, which was correlated with its ubiquitinylation. The changes in antioxidant gene expression did not directly correlate with differences in cAMP-PKA signaling. Despite differences in their capacities to hydrolyze cAMP, total cAMP levels among OxiR1, OxiS1, and mock were similar; PKA activity, however, was lower in OxiS1 than in OxiR1 or mock. During exposure to H2O2, however, Sch9p activity, a target of Rapamycin complex 1-regulated Rps6 kinase and negative-regulator of PKA, was rapidly reduced in OxiR1, and Tpk1p, a PKA catalytic subunit, was diffusely spread throughout the cytosol, with PKA activation. In OxiS1, Sch9p activity was unchanged during exposure to H2O2, consistent with reduced activation of PKA. These results suggest that, during oxidative stress, TOR-Sch9 signaling might regulate PKA activity, and that post-translational modifications of hPDE3A are critical in its regulation of cellular recovery from oxidative stress.
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187
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Plasma Immunoproteasome Predicts Early Hemorrhagic Transformation in Acute Ischemic Stroke Patients. J Stroke Cerebrovasc Dis 2016; 26:49-56. [PMID: 27639588 DOI: 10.1016/j.jstrokecerebrovasdis.2016.08.027] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 08/09/2016] [Accepted: 08/17/2016] [Indexed: 01/29/2023] Open
Abstract
BACKGROUND AND PURPOSE Currently, blood biomarkers associated with an increased hemorrhagic transformation (HT) risk remain uncertain. We aimed to determine the significance of immunoproteasome as predictors of early HT in acute ischemic stroke patients. METHODS This study enrolled 316 patients with ischemic stroke. HT was assessed by computed tomography examination performed on day 5 ± 2 after stroke onset or immediately in case of clinical deterioration (CD). Plasma immunoproteasome subunits low molecular mass peptide 2 (LMP2), multicatalytic endopeptidase complex-like 1 (MECL-1), LMP7, interleukin-1β (IL1β), and high-sensitivity C-reactive protein (Hs-CRP) were measured with quantitative sandwich enzyme-linked immunosorbent assay kits. Factors associated with HT were analyzed using a multivariate logistic regression analysis. RESULTS There were 42 (13.3%, 42 of 316) patients who experienced HT. Compared with those patients without HT, plasma LMP2, MECL-1, LMP7, IL1β, and Hs-CRP concentrations on admission were significantly increased in patients with subsequent HT (P < .001). These protein concentrations increased with hemorrhage severity. Patients with CD caused by HT had the highest levels of LMP2 (1679.5 [1394.6-136.6] pg/mL), MECL-1 (992.5 [849.7-1075.8] pg/mL), LMP7 (822.6 [748.6-1009.5] pg/mL), IL1β (113.2 [90.6-194.5] pg/mL), and Hs-CRP (30.0 [12.8-75.6] mg/L) (P < .05). Logistic regression analysis showed cardioembolism, LMP2, MECL-1, and LMP7 as independent predictors of HT (P < .05). Receiver operating characteristic curve analysis demonstrated LMP2 ≥ 988.3 pg/mL, MECL-1 ≥ 584.7 pg/mL, and LMP7 ≥ 509.0 pg/mL as independent factors associated with HT (P < .001). CONCLUSION Evaluation of plasma levels of immunoproteasome could be helpful in the early prediction of HT in acute ischemic stroke patients.
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188
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De Panis DN, Padró J, Furió-Tarí P, Tarazona S, Milla Carmona PS, Soto IM, Dopazo H, Conesa A, Hasson E. Transcriptome modulation during host shift is driven by secondary metabolites in desert Drosophila. Mol Ecol 2016; 25:4534-50. [PMID: 27483442 DOI: 10.1111/mec.13785] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Revised: 07/14/2016] [Accepted: 07/21/2016] [Indexed: 12/20/2022]
Abstract
High-throughput transcriptome studies are breaking new ground to investigate the responses that organisms deploy in alternative environments. Nevertheless, much remains to be understood about the genetic basis of host plant adaptation. Here, we investigate genome-wide expression in the fly Drosophila buzzatii raised in different conditions. This species uses decaying tissues of cactus of the genus Opuntia as primary rearing substrate and secondarily, the necrotic tissues of the columnar cactus Trichocereus terscheckii. The latter constitutes a harmful host, rich in mescaline and other related phenylethylamine alkaloids. We assessed the transcriptomic responses of larvae reared in Opuntia sulphurea and T. terscheckii, with and without the addition of alkaloids extracted from the latter. Whole-genome expression profiles were massively modulated by the rearing environment, mainly by the presence of T. terscheckii alkaloids. Differentially expressed genes were mainly related to detoxification, oxidation-reduction and stress response; however, we also found genes involved in development and neurobiological processes. In conclusion, our study contributes new data onto the role of transcriptional plasticity in response to alternative rearing environments.
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Affiliation(s)
- Diego N De Panis
- IEGEBA-CONICET, UNiversidad de Buenos Aires, FAcultad de Ciencias Exactas y Naturales, Intendente Güiraldes 2160, Ciudad Universitaria (C1428 EHA), CABA, Argentina.
| | - Julián Padró
- IEGEBA-CONICET, UNiversidad de Buenos Aires, FAcultad de Ciencias Exactas y Naturales, Intendente Güiraldes 2160, Ciudad Universitaria (C1428 EHA), CABA, Argentina
| | - Pedro Furió-Tarí
- Genomics of Gene Expression Lab, Centro de Investigación Príncipe Felipe, Eduardo Primo Yúfera 3, Valencia, 46012, Spain
| | - Sonia Tarazona
- Genomics of Gene Expression Lab, Centro de Investigación Príncipe Felipe, Eduardo Primo Yúfera 3, Valencia, 46012, Spain.,Department of Applied Statistics, Operations Research and Quality, Universitat Politècnica de València, Camí de Vera, Valencia, 46022, Spain
| | - Pablo S Milla Carmona
- IEGEBA-CONICET, UNiversidad de Buenos Aires, FAcultad de Ciencias Exactas y Naturales, Intendente Güiraldes 2160, Ciudad Universitaria (C1428 EHA), CABA, Argentina.,Laboratorio de Ecosistemas Marinos Fósiles, Instituto de Estudios Andinos Don Pablo Groeber (CONICET-UBA), Intendente Güiraldes 2160, Ciudad Universitaria (C1428 EHA), CABA, Argentina
| | - Ignacio M Soto
- IEGEBA-CONICET, UNiversidad de Buenos Aires, FAcultad de Ciencias Exactas y Naturales, Intendente Güiraldes 2160, Ciudad Universitaria (C1428 EHA), CABA, Argentina
| | - Hernán Dopazo
- IEGEBA-CONICET, UNiversidad de Buenos Aires, FAcultad de Ciencias Exactas y Naturales, Intendente Güiraldes 2160, Ciudad Universitaria (C1428 EHA), CABA, Argentina
| | - Ana Conesa
- Genomics of Gene Expression Lab, Centro de Investigación Príncipe Felipe, Eduardo Primo Yúfera 3, Valencia, 46012, Spain. .,Microbiology and Cell Science Department, Institute for Food and Agricultural Sciences, University of Florida at Gainesville, Gainesville, FL, 32603, USA.
| | - Esteban Hasson
- IEGEBA-CONICET, UNiversidad de Buenos Aires, FAcultad de Ciencias Exactas y Naturales, Intendente Güiraldes 2160, Ciudad Universitaria (C1428 EHA), CABA, Argentina.
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189
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miR-100 antagonism triggers apoptosis by inhibiting ubiquitination-mediated p53 degradation. Oncogene 2016; 36:1023-1037. [PMID: 27524417 DOI: 10.1038/onc.2016.270] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Revised: 06/13/2016] [Accepted: 06/23/2016] [Indexed: 12/14/2022]
Abstract
During tumourigenesis, p53 functions as 'the guardian of the genome' because p53-dependent apoptosis strongly regulates the fate of cancer cells. Therefore, p53 regulation must be sensitive and accurate. p53 activity is regulated through its ubiquitination and deubiquitination. However, the role of microRNA in ubiquitin-mediated p53 degradation has not been previously studied. Our previous studies indicated that miR-100 is required for apoptosis. In the current study, the mechanism of p53 protein ubiquitination mediated by miR-100 was characterized. An analysis of primary tumour samples from gastric cancer patients showed a significant correlation between miR-100 upregulation and primary human gastric tumourigenesis and progression. The in vivo and in vitro data indicated that miR-100 antagonism specifically induced the apoptosis of poorly differentiated gastric cancer cells but not non-cancerous gastric cells, indicating that miR-100 has a crucial role in regulating the progression of gastric tumours. In the regulation of p53-dependent apoptosis, miR-100 antagonism inhibited ubiquitin-mediated p53 protein degradation by activating RNF144B, an E3 ubiquitination ligase. Consequently, the miR-100-RNF144B-pirh2-p53-dependent pathway was initiated. Our findings highlight a novel mechanism of ubiquitin-mediated p53 protein degradation in apoptosis.
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190
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Lee KY, Chiang LL, Ho SC, Liu WT, Chen TT, Feng PH, Su CL, Chuang KJ, Chang CC, Chuang HC. Associations of autophagy with lung diffusion capacity and oxygen saturation in severe COPD: effects of particulate air pollution. Int J Chron Obstruct Pulmon Dis 2016; 11:1569-78. [PMID: 27468231 PMCID: PMC4946865 DOI: 10.2147/copd.s108993] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Although traffic exposure has been associated with the development of COPD, the role of particulate matter <10 μm in aerodynamic diameter (PM10) in the pathogenesis of COPD is not yet fully understood. We assessed the 1-year effect of exposure to PM10 on the pathogenesis of COPD in a retrospective cohort study. We recruited 53 subjects with COPD stages III and IV and 15 healthy controls in a hospital in Taiwan. We estimated the 1-year annual mean levels of PM10 at all residential addresses of the cohort participants. Changes in PM10 for the 1-year averages in quintiles were related to diffusion capacity of the lung for carbon monoxide levels (r=−0.914, P=0.029), changes in the pulse oxygen saturation (ΔSaO2; r=−0.973, P=0.005), receptor for advanced glycation end-products (r=−0.881, P=0.048), interleukin-6 (r=0.986, P=0.002), ubiquitin (r=0.940, P=0.017), and beclin 1 (r=0.923, P=0.025) in COPD. Next, we observed that ubiquitin was correlated with ΔSaO2 (r=−0.374, P=0.019). Beclin 1 was associated with diffusion capacity of the lung for carbon monoxide (r=−0.362, P=0.028), ΔSaO2 (r=−0.354, P=0.032), and receptor for advanced glycation end-products (r=−0.471, P=0.004). Autophagy may be an important regulator of the PM10-related pathogenesis of COPD, which could cause deterioration in the lung diffusion capacity and oxygen saturation.
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Affiliation(s)
- Kang-Yun Lee
- Division of Pulmonary Medicine, Department of Internal Medicine, Shuang Ho Hospital; Department of Internal Medicine, School of Medicine
| | - Ling-Ling Chiang
- Division of Pulmonary Medicine, Department of Internal Medicine, Shuang Ho Hospital; School of Respiratory Therapy
| | - Shu-Chuan Ho
- Division of Pulmonary Medicine, Department of Internal Medicine, Shuang Ho Hospital; School of Respiratory Therapy
| | - Wen-Te Liu
- Division of Pulmonary Medicine, Department of Internal Medicine, Shuang Ho Hospital; Department of Internal Medicine, School of Medicine; School of Respiratory Therapy
| | - Tzu-Tao Chen
- Division of Pulmonary Medicine, Department of Internal Medicine, Shuang Ho Hospital
| | - Po-Hao Feng
- Division of Pulmonary Medicine, Department of Internal Medicine, Shuang Ho Hospital; Department of Internal Medicine, School of Medicine
| | - Chien-Ling Su
- Division of Pulmonary Medicine, Department of Internal Medicine, Shuang Ho Hospital; School of Respiratory Therapy
| | - Kai-Jen Chuang
- Department of Public Health, School of Medicine, College of Medicine; School of Public Health, College of Public Health and Nutrition, Taipei Medical University, Taipei City, Taiwan
| | - Chih-Cheng Chang
- Division of Pulmonary Medicine, Department of Internal Medicine, Shuang Ho Hospital; Department of Internal Medicine, School of Medicine
| | - Hsiao-Chi Chuang
- Division of Pulmonary Medicine, Department of Internal Medicine, Shuang Ho Hospital; Department of Internal Medicine, School of Medicine; School of Respiratory Therapy
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191
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Kwon J, Wang A, Burke DJ, Boudreau HE, Lekstrom KJ, Korzeniowska A, Sugamata R, Kim YS, Yi L, Ersoy I, Jaeger S, Palaniappan K, Ambruso DR, Jackson SH, Leto TL. Peroxiredoxin 6 (Prdx6) supports NADPH oxidase1 (Nox1)-based superoxide generation and cell migration. Free Radic Biol Med 2016; 96:99-115. [PMID: 27094494 PMCID: PMC4929831 DOI: 10.1016/j.freeradbiomed.2016.04.009] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Revised: 04/11/2016] [Accepted: 04/12/2016] [Indexed: 02/05/2023]
Abstract
Nox1 is an abundant source of reactive oxygen species (ROS) in colon epithelium recently shown to function in wound healing and epithelial homeostasis. We identified Peroxiredoxin 6 (Prdx6) as a novel binding partner of Nox activator 1 (Noxa1) in yeast two-hybrid screening experiments using the Noxa1 SH3 domain as bait. Prdx6 is a unique member of the Prdx antioxidant enzyme family exhibiting both glutathione peroxidase and phospholipase A2 activities. We confirmed this interaction in cells overexpressing both proteins, showing Prdx6 binds to and stabilizes wild type Noxa1, but not the SH3 domain mutant form, Noxa1 W436R. We demonstrated in several cell models that Prdx6 knockdown suppresses Nox1 activity, whereas enhanced Prdx6 expression supports higher Nox1-derived superoxide production. Both peroxidase- and lipase-deficient mutant forms of Prdx6 (Prdx6 C47S and S32A, respectively) failed to bind to or stabilize Nox1 components or support Nox1-mediated superoxide generation. Furthermore, the transition-state substrate analogue inhibitor of Prdx6 phospholipase A2 activity (MJ-33) was shown to suppress Nox1 activity, suggesting Nox1 activity is regulated by the phospholipase activity of Prdx6. Finally, wild type Prdx6, but not lipase or peroxidase mutant forms, supports Nox1-mediated cell migration in the HCT-116 colon epithelial cell model of wound closure. These findings highlight a novel pathway in which this antioxidant enzyme positively regulates an oxidant-generating system to support cell migration and wound healing.
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Affiliation(s)
- Jaeyul Kwon
- Laboratory of Host Defenses, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
- Department of Medical Education, School of Medicine, Chungnam National University, Daejeon, 301-747, Korea
| | - Aibing Wang
- Diabetes Cluster, National Institute on Minority Health and Health Disparities, National Institutes of Health, Bethesda, MD, USA
| | - Devin J. Burke
- Laboratory of Host Defenses, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
| | - Howard E. Boudreau
- Laboratory of Host Defenses, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
| | - Kristen J. Lekstrom
- Laboratory of Host Defenses, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
| | - Agnieszka Korzeniowska
- Laboratory of Host Defenses, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
| | - Ryuichi Sugamata
- Laboratory of Host Defenses, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
| | - Yong-Soo Kim
- Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
| | - Liang Yi
- Diabetes Cluster, National Institute on Minority Health and Health Disparities, National Institutes of Health, Bethesda, MD, USA
| | - Ilker Ersoy
- Department of Pathology and Anatomical Sciences, University of Missouri, Sch. of Medicine, Columbia, MO, USA
| | - Stefan Jaeger
- Lister Hill National Center for Biomedical Communications, National Library of Medicine, National Institutes of Health, Bethesda, MD, USA
| | | | - Daniel R. Ambruso
- Department of Pediatrics, University of Colorado Sch. of Medicine, Denver, CO, USA
| | - Sharon H. Jackson
- Diabetes Cluster, National Institute on Minority Health and Health Disparities, National Institutes of Health, Bethesda, MD, USA
| | - Thomas L. Leto
- Laboratory of Host Defenses, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
- Corresponding author: Laboratory of Host Defenses, NIAID, NIH, 12441 Parklawn Drive, Rockville, MD, 20852, USA. Fax: 301 480-1731.
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192
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Rincón-Cervera MA, Valenzuela R, Hernandez-Rodas MC, Marambio M, Espinosa A, Mayer S, Romero N, Barrera M Sc C, Valenzuela A, Videla LA. Supplementation with antioxidant-rich extra virgin olive oil prevents hepatic oxidative stress and reduction of desaturation capacity in mice fed a high-fat diet: Effects on fatty acid composition in liver and extrahepatic tissues. Nutrition 2016; 32:1254-67. [PMID: 27346714 DOI: 10.1016/j.nut.2016.04.006] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2016] [Revised: 03/30/2016] [Accepted: 04/22/2016] [Indexed: 01/18/2023]
Abstract
OBJECTIVE The aim of this study was to assess the effect of dietary supplementation with extra virgin olive oil (EVOO) in mice on the reduction of desaturase and antioxidant enzymatic activities in liver, concomitantly with long-chain polyunsaturated fatty acids (LCPUFA) profiles in liver and extrahepatic tissues induced by a high-fat diet (HFD). METHODS Male mice C57 BL/6 J were fed with a control diet (CD; 10% fat, 20% protein, 70% carbohydrates) or an HFD (60% fat, 20% protein, 20% carbohydrates) for 12 wk. Animals were supplemented with 100 mg/d EVOO with different antioxidant contents (EVOO I, II, and III). RESULTS After the intervention, blood and several tissues were analyzed. Dietary supplementation with EVOO with the highest antioxidant content and antioxidant capacity (EVOO III) significantly reduced fat accumulation in liver and the plasmatic metabolic alterations caused by HFD and produced a normalization of oxidative stress-related parameters, desaturase activities, and LCPUFA content in tissues. CONCLUSIONS Data suggest that dietary supplementation with EVOO III may prevent oxidative stress and reduction of biosynthesis and accretion of ω-3 LCPUFA in the liver of HFD-fed mice.
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Affiliation(s)
| | - Rodrigo Valenzuela
- Lipid Center, Institute of Nutrition and Food Technology, University of Chile, Santiago, Chile; Nutrition Department, Faculty of Medicine, University of Chile, Santiago, Chile.
| | | | - Macarena Marambio
- Nutrition Department, Faculty of Medicine, University of Chile, Santiago, Chile
| | - Alejandra Espinosa
- Medical Technology Department, Faculty of Medicine, University of Chile, Santiago, Chile
| | - Susana Mayer
- Nutrition Department, Faculty of Medicine, University of Chile, Santiago, Chile
| | - Nalda Romero
- Faculty of Chemical Sciences and Pharmacy, Department of Food Science and Chemical Technology, University of Chile, Santiago, Chile
| | | | - Alfonso Valenzuela
- Lipid Center, Institute of Nutrition and Food Technology, University of Chile, Santiago, Chile
| | - Luis A Videla
- Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile
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193
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Raynes R, Pomatto LCD, Davies KJA. Degradation of oxidized proteins by the proteasome: Distinguishing between the 20S, 26S, and immunoproteasome proteolytic pathways. Mol Aspects Med 2016; 50:41-55. [PMID: 27155164 DOI: 10.1016/j.mam.2016.05.001] [Citation(s) in RCA: 153] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2015] [Revised: 03/29/2016] [Accepted: 05/02/2016] [Indexed: 12/11/2022]
Abstract
The proteasome is a ubiquitous and highly plastic multi-subunit protease with multi-catalytic activity that is conserved in all eukaryotes. The most widely known function of the proteasome is protein degradation through the 26S ubiquitin-proteasome system, responsible for the vast majority of protein degradation during homeostasis. However, the proteasome also plays an important role in adaptive immune responses and adaptation to oxidative stress. The unbound 20S proteasome, the core common to all proteasome conformations, is the main protease responsible for degrading oxidized proteins. During periods of acute stress, the 19S regulatory cap of the 26S proteasome disassociates from the proteolytic core, allowing for immediate ATP/ubiquitin-independent protein degradation by the 20S proteasome. Despite the abundance of unbound 20S proteasome compared to other proteasomal conformations, many publications fail to distinguish between the two proteolytic systems and often regard the 26S proteasome as the dominant protease. Further confounding the issue are the differential roles these two proteolytic systems have in adaptation and aging. In this review, we will summarize the increasing evidence that the 20S core proteasome constitutes the major conformation of the proteasome system and that it is far from a latent protease requiring activation by binding regulators.
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Affiliation(s)
- Rachel Raynes
- Leonard Davis School of Gerontology of the Ethel Percy Andrus Gerontology Center, The University of Southern California, Los Angeles, CA 90089-0191, USA; Division of Molecular and Computational Biology, Department of Biological Sciences of the Dornsife College of Letters, Arts, and Sciences, The University of Southern California, Los Angeles, CA 90089-0191, USA
| | - Laura C D Pomatto
- Leonard Davis School of Gerontology of the Ethel Percy Andrus Gerontology Center, The University of Southern California, Los Angeles, CA 90089-0191, USA; Division of Molecular and Computational Biology, Department of Biological Sciences of the Dornsife College of Letters, Arts, and Sciences, The University of Southern California, Los Angeles, CA 90089-0191, USA
| | - Kelvin J A Davies
- Leonard Davis School of Gerontology of the Ethel Percy Andrus Gerontology Center, The University of Southern California, Los Angeles, CA 90089-0191, USA; Division of Molecular and Computational Biology, Department of Biological Sciences of the Dornsife College of Letters, Arts, and Sciences, The University of Southern California, Los Angeles, CA 90089-0191, USA.
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194
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Melnikova NV, Dmitriev AA, Belenikin MS, Koroban NV, Speranskaya AS, Krinitsina AA, Krasnov GS, Lakunina VA, Snezhkina AV, Sadritdinova AF, Kishlyan NV, Rozhmina TA, Klimina KM, Amosova AV, Zelenin AV, Muravenko OV, Bolsheva NL, Kudryavtseva AV. Identification, Expression Analysis, and Target Prediction of Flax Genotroph MicroRNAs Under Normal and Nutrient Stress Conditions. FRONTIERS IN PLANT SCIENCE 2016; 7:399. [PMID: 27092149 PMCID: PMC4821855 DOI: 10.3389/fpls.2016.00399] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Accepted: 03/14/2016] [Indexed: 05/19/2023]
Abstract
Cultivated flax (Linum usitatissimum L.) is an important plant valuable for industry. Some flax lines can undergo heritable phenotypic and genotypic changes (LIS-1 insertion being the most common) in response to nutrient stress and are called plastic lines. Offspring of plastic lines, which stably inherit the changes, are called genotrophs. MicroRNAs (miRNAs) are involved in a crucial regulatory mechanism of gene expression. They have previously been assumed to take part in nutrient stress response and can, therefore, participate in genotroph formation. In the present study, we performed high-throughput sequencing of small RNAs (sRNAs) extracted from flax plants grown under normal, phosphate deficient and nutrient excess conditions to identify miRNAs and evaluate their expression. Our analysis revealed expression of 96 conserved miRNAs from 21 families in flax. Moreover, 475 novel potential miRNAs were identified for the first time, and their targets were predicted. However, none of the identified miRNAs were transcribed from LIS-1. Expression of seven miRNAs (miR168, miR169, miR395, miR398, miR399, miR408, and lus-miR-N1) with up- or down-regulation under nutrient stress (on the basis of high-throughput sequencing data) was evaluated on extended sampling using qPCR. Reference gene search identified ETIF3H and ETIF3E genes as most suitable for this purpose. Down-regulation of novel potential lus-miR-N1 and up-regulation of conserved miR399 were revealed under the phosphate deficient conditions. In addition, the negative correlation of expression of lus-miR-N1 and its predicted target, ubiquitin-activating enzyme E1 gene, as well as, miR399 and its predicted target, ubiquitin-conjugating enzyme E2 gene, was observed. Thus, in our study, miRNAs expressed in flax plastic lines and genotrophs were identified and their expression and expression of their targets was evaluated using high-throughput sequencing and qPCR for the first time. These data provide new insights into nutrient stress response regulation in plastic flax cultivars.
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Affiliation(s)
- Nataliya V. Melnikova
- Laboratory of Post-Genomic Research, Engelhardt Institute of Molecular Biology, Russian Academy of SciencesMoscow, Russia
| | - Alexey A. Dmitriev
- Laboratory of Structural and Functional Genomics, Engelhardt Institute of Molecular Biology, Russian Academy of SciencesMoscow, Russia
| | - Maxim S. Belenikin
- Laboratory of Post-Genomic Research, Engelhardt Institute of Molecular Biology, Russian Academy of SciencesMoscow, Russia
- Department of Higher Plants, Lomonosov Moscow State UniversityMoscow, Russia
| | - Nadezhda V. Koroban
- Laboratory of Post-Genomic Research, Engelhardt Institute of Molecular Biology, Russian Academy of SciencesMoscow, Russia
| | - Anna S. Speranskaya
- Laboratory of Post-Genomic Research, Engelhardt Institute of Molecular Biology, Russian Academy of SciencesMoscow, Russia
- Department of Higher Plants, Lomonosov Moscow State UniversityMoscow, Russia
| | | | - George S. Krasnov
- Laboratory of Post-Genomic Research, Engelhardt Institute of Molecular Biology, Russian Academy of SciencesMoscow, Russia
| | - Valentina A. Lakunina
- Laboratory of Post-Genomic Research, Engelhardt Institute of Molecular Biology, Russian Academy of SciencesMoscow, Russia
| | - Anastasiya V. Snezhkina
- Laboratory of Post-Genomic Research, Engelhardt Institute of Molecular Biology, Russian Academy of SciencesMoscow, Russia
| | - Asiya F. Sadritdinova
- Laboratory of Post-Genomic Research, Engelhardt Institute of Molecular Biology, Russian Academy of SciencesMoscow, Russia
| | - Natalya V. Kishlyan
- Laboratory of Genetics, All-Russian Research Institute for FlaxTorzhok, Russia
| | - Tatiana A. Rozhmina
- Laboratory of Genetics, All-Russian Research Institute for FlaxTorzhok, Russia
| | - Kseniya M. Klimina
- Laboratory of Genetics of Microorganisms, Vavilov Institute of General Genetics, Russian Academy of SciencesMoscow, Russia
| | - Alexandra V. Amosova
- Laboratory of Molecular Karyology, Engelhardt Institute of Molecular Biology, Russian Academy of SciencesMoscow, Russia
| | - Alexander V. Zelenin
- Laboratory of Molecular Karyology, Engelhardt Institute of Molecular Biology, Russian Academy of SciencesMoscow, Russia
| | - Olga V. Muravenko
- Laboratory of Molecular Karyology, Engelhardt Institute of Molecular Biology, Russian Academy of SciencesMoscow, Russia
| | - Nadezhda L. Bolsheva
- Laboratory of Molecular Karyology, Engelhardt Institute of Molecular Biology, Russian Academy of SciencesMoscow, Russia
| | - Anna V. Kudryavtseva
- Laboratory of Post-Genomic Research, Engelhardt Institute of Molecular Biology, Russian Academy of SciencesMoscow, Russia
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195
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Gilda JE, Lai X, Witzmann FA, Gomes AV. Delineation of Molecular Pathways Involved in Cardiomyopathies Caused by Troponin T Mutations. Mol Cell Proteomics 2016; 15:1962-81. [PMID: 27022107 DOI: 10.1074/mcp.m115.057380] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Indexed: 11/06/2022] Open
Abstract
Familial hypertrophic cardiomyopathy (FHC) is associated with mild to severe cardiac problems and is the leading cause of sudden death in young people and athletes. Although the genetic basis for FHC is well-established, the molecular mechanisms that ultimately lead to cardiac dysfunction are not well understood. To obtain important insights into the molecular mechanism(s) involved in FHC, hearts from two FHC troponin T models (Ile79Asn [I79N] and Arg278Cys [R278C]) were investigated using label-free proteomics and metabolomics. Mutations in troponin T are the third most common cause of FHC, and the I79N mutation is associated with a high risk of sudden cardiac death. Most FHC-causing mutations, including I79N, increase the Ca(2+) sensitivity of the myofilament; however, the R278C mutation does not alter Ca(2+) sensitivity and is associated with a better prognosis than most FHC mutations. Out of more than 1200 identified proteins, 53 and 76 proteins were differentially expressed in I79N and R278C hearts, respectively, when compared with wild-type hearts. Interestingly, more than 400 proteins were differentially expressed when the I79N and R278C hearts were directly compared. The three major pathways affected in I79N hearts relative to R278C and wild-type hearts were the ubiquitin-proteasome system, antioxidant systems, and energy production pathways. Further investigation of the proteasome system using Western blotting and activity assays showed that proteasome dysfunction occurs in I79N hearts. Metabolomic results corroborate the proteomic data and suggest the glycolytic, citric acid, and electron transport chain pathways are important pathways that are altered in I79N hearts relative to R278C or wild-type hearts. Our findings suggest that impaired energy production and protein degradation dysfunction are important mechanisms in FHCs associated with poor prognosis and that cardiac hypertrophy is not likely needed for a switch from fatty acid to glucose metabolism.
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Affiliation(s)
| | - Xianyin Lai
- ¶Department of Cellular and Integrative Physiology, Indiana University School of Medicine, Indianapolis, Indiana 46202
| | - Frank A Witzmann
- ¶Department of Cellular and Integrative Physiology, Indiana University School of Medicine, Indianapolis, Indiana 46202
| | - Aldrin V Gomes
- From the ‡Department of Neurobiology, Physiology, and Behavior, §Department of Physiology and Membrane Biology, University of California, Davis, California 95616;
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196
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Bourgoin-Voillard S, Goron A, Seve M, Moinard C. Regulation of the proteome by amino acids. Proteomics 2016; 16:831-46. [DOI: 10.1002/pmic.201500347] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Revised: 12/30/2015] [Accepted: 01/12/2016] [Indexed: 12/14/2022]
Affiliation(s)
- Sandrine Bourgoin-Voillard
- Plateforme de Protéomique PROMETHEE; IAB; University Grenoble Alpes; Grenoble France
- Plateforme de Protéomique PROMETHEE, Institut de Biologie et de Pathologie; CHU de Grenoble; Grenoble France
- Plateforme de Protéomique PROMETHEE; IAB; INSERM; Grenoble France
| | - Arthur Goron
- Laboratory of Fundamental and Applied Bioenergetics (LBFA); University Grenoble Alpes; Grenoble France
- Laboratory of Fundamental and Applied Bioenergetics (LBFA); INSERM; Grenoble France
| | - Michel Seve
- Plateforme de Protéomique PROMETHEE; IAB; University Grenoble Alpes; Grenoble France
- Plateforme de Protéomique PROMETHEE, Institut de Biologie et de Pathologie; CHU de Grenoble; Grenoble France
- Plateforme de Protéomique PROMETHEE; IAB; INSERM; Grenoble France
| | - Christophe Moinard
- Laboratory of Fundamental and Applied Bioenergetics (LBFA); University Grenoble Alpes; Grenoble France
- Laboratory of Fundamental and Applied Bioenergetics (LBFA); INSERM; Grenoble France
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197
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Zabielski P, Lanza IR, Gopala S, Heppelmann CJH, Bergen HR, Dasari S, Nair KS. Altered Skeletal Muscle Mitochondrial Proteome As the Basis of Disruption of Mitochondrial Function in Diabetic Mice. Diabetes 2016; 65:561-73. [PMID: 26718503 PMCID: PMC4764144 DOI: 10.2337/db15-0823] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Accepted: 12/01/2015] [Indexed: 12/11/2022]
Abstract
Insulin plays pivotal role in cellular fuel metabolism in skeletal muscle. Despite being the primary site of energy metabolism, the underlying mechanism on how insulin deficiency deranges skeletal muscle mitochondrial physiology remains to be fully understood. Here we report an important link between altered skeletal muscle proteome homeostasis and mitochondrial physiology during insulin deficiency. Deprivation of insulin in streptozotocin-induced diabetic mice decreased mitochondrial ATP production, reduced coupling and phosphorylation efficiency, and increased oxidant emission in skeletal muscle. Proteomic survey revealed that the mitochondrial derangements during insulin deficiency were related to increased mitochondrial protein degradation and decreased protein synthesis, resulting in reduced abundance of proteins involved in mitochondrial respiration and β-oxidation. However, a paradoxical upregulation of proteins involved in cellular uptake of fatty acids triggered an accumulation of incomplete fatty acid oxidation products in skeletal muscle. These data implicate a mismatch of β-oxidation and fatty acid uptake as a mechanism leading to increased oxidative stress in diabetes. This notion was supported by elevated oxidative stress in cultured myotubes exposed to palmitate in the presence of a β-oxidation inhibitor. Together, these results indicate that insulin deficiency alters the balance of proteins involved in fatty acid transport and oxidation in skeletal muscle, leading to impaired mitochondrial function and increased oxidative stress.
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Affiliation(s)
- Piotr Zabielski
- Division of Endocrinology, Diabetes, Metabolism, and Nutrition, Mayo Clinic College of Medicine, Rochester, MN
| | - Ian R Lanza
- Division of Endocrinology, Diabetes, Metabolism, and Nutrition, Mayo Clinic College of Medicine, Rochester, MN
| | - Srinivas Gopala
- Division of Endocrinology, Diabetes, Metabolism, and Nutrition, Mayo Clinic College of Medicine, Rochester, MN
| | | | - H Robert Bergen
- Department of Biochemistry and Molecular Biology, Mayo Clinic College of Medicine, Rochester, MN
| | - Surendra Dasari
- Division of Biomedical Statistics and Informatics, Mayo Clinic College of Medicine, Rochester, MN
| | - K Sreekumaran Nair
- Division of Endocrinology, Diabetes, Metabolism, and Nutrition, Mayo Clinic College of Medicine, Rochester, MN
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198
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ROS and ROS-Mediated Cellular Signaling. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2016; 2016:4350965. [PMID: 26998193 PMCID: PMC4779832 DOI: 10.1155/2016/4350965] [Citation(s) in RCA: 1054] [Impact Index Per Article: 131.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Revised: 12/01/2015] [Accepted: 12/20/2015] [Indexed: 12/22/2022]
Abstract
It has long been recognized that an increase of reactive oxygen species (ROS) can modify the cell-signaling proteins and have functional consequences, which successively mediate pathological processes such as atherosclerosis, diabetes, unchecked growth, neurodegeneration, inflammation, and aging. While numerous articles have demonstrated the impacts of ROS on various signaling pathways and clarify the mechanism of action of cell-signaling proteins, their influence on the level of intracellular ROS, and their complex interactions among multiple ROS associated signaling pathways, the systemic summary is necessary. In this review paper, we particularly focus on the pattern of the generation and homeostasis of intracellular ROS, the mechanisms and targets of ROS impacting on cell-signaling proteins (NF-κB, MAPKs, Keap1-Nrf2-ARE, and PI3K-Akt), ion channels and transporters (Ca(2+) and mPTP), and modifying protein kinase and Ubiquitination/Proteasome System.
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199
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Gong B, Radulovic M, Figueiredo-Pereira ME, Cardozo C. The Ubiquitin-Proteasome System: Potential Therapeutic Targets for Alzheimer's Disease and Spinal Cord Injury. Front Mol Neurosci 2016; 9:4. [PMID: 26858599 PMCID: PMC4727241 DOI: 10.3389/fnmol.2016.00004] [Citation(s) in RCA: 112] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Accepted: 01/07/2016] [Indexed: 01/20/2023] Open
Abstract
The ubiquitin-proteasome system (UPS) is a crucial protein degradation system in eukaryotes. Herein, we will review advances in the understanding of the role of several proteins of the UPS in Alzheimer’s disease (AD) and functional recovery after spinal cord injury (SCI). The UPS consists of many factors that include E3 ubiquitin ligases, ubiquitin hydrolases, ubiquitin and ubiquitin-like molecules, and the proteasome itself. An extensive body of work links UPS dysfunction with AD pathogenesis and progression. More recently, the UPS has been shown to have vital roles in recovery of function after SCI. The ubiquitin hydrolase (Uch-L1) has been proposed to increase cellular levels of mono-ubiquitin and hence to increase rates of protein turnover by the UPS. A low Uch-L1 level has been linked with Aβ accumulation in AD and reduced neuroregeneration after SCI. One likely mechanism for these beneficial effects of Uch-L1 is reduced turnover of the PKA regulatory subunit and consequently, reduced signaling via CREB. The neuron-specific F-box protein Fbx2 ubiquitinates β-secretase thus targeting it for proteasomal degradation and reducing generation of Aβ. Both Uch-L1 and Fbx2 improve synaptic plasticity and cognitive function in mouse AD models. The role of Fbx2 after SCI has not been examined, but abolishing ß-secretase reduces neuronal recovery after SCI, associated with reduced myelination. UBB+1, which arises through a frame-shift mutation in the ubiquitin gene that adds 19 amino acids to the C-terminus of ubiquitin, inhibits proteasomal function and is associated with increased neurofibrillary tangles in patients with AD, Pick’s disease and Down’s syndrome. These advances in understanding of the roles of the UPS in AD and SCI raise new questions but, also, identify attractive and exciting targets for potential, future therapeutic interventions.
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Affiliation(s)
- Bing Gong
- Department of Medicine, Mount Sinai School of MedicineNew York, NY, USA; Medicine, James J. Peters Veteran Affairs Medical CenterBronx, NY, USA
| | - Miroslav Radulovic
- Department of Medicine, Mount Sinai School of MedicineNew York, NY, USA; Medicine, James J. Peters Veteran Affairs Medical CenterBronx, NY, USA; National Center of Excellence for the Medical Consequences of Spinal Cord Injury (SCI)Bronx, NY, USA
| | - Maria E Figueiredo-Pereira
- Department of Biological Sciences, Hunter College, and the Graduate School and University Center, The City University of New York New York, NY, USA
| | - Christopher Cardozo
- Department of Medicine, Mount Sinai School of MedicineNew York, NY, USA; Medicine, James J. Peters Veteran Affairs Medical CenterBronx, NY, USA; National Center of Excellence for the Medical Consequences of Spinal Cord Injury (SCI)Bronx, NY, USA
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200
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Xu W, Bai K, He J, Su W, Dong L, Zhang L, Wang T. Leucine improves growth performance of intrauterine growth retardation piglets by modifying gene and protein expression related to protein synthesis. Nutrition 2016; 32:114-21. [DOI: 10.1016/j.nut.2015.07.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2014] [Revised: 05/31/2015] [Accepted: 07/07/2015] [Indexed: 01/10/2023]
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