51
|
Zhou L, Yao M, Tian Z, Song Y, Sun Y, Ye J, Li G, Sng KS, Xu L, Cui X, Wang Y. Echinacoside attenuates inflammatory response in a rat model of cervical spondylotic myelopathy via inhibition of excessive mitochondrial fission. Free Radic Biol Med 2020; 152:697-714. [PMID: 32014501 DOI: 10.1016/j.freeradbiomed.2020.01.014] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Revised: 12/27/2019] [Accepted: 01/14/2020] [Indexed: 12/15/2022]
Abstract
Cervical spondylotic myelopathy (CSM) is a leading cause of spinal cord dysfunction with few treatment options. Although mitochondrial dynamics are linked to a wide range of pathological changes in neurodegenerative diseases, a connection between aberrant mitochondrial dynamics and CSM remains to be illuminated. In addition, mechanisms underlying the emerging anti-inflammatory and neuroprotective effects of echinacoside (ECH), the main active ingredient of Cistanche salsa, are poorly understood. We hypothesized that excessive mitochondrial fission plays a critical role in regulating inflammatory responses in CSM, and ECH might alleviate such responses by regulating mitochondrial dynamics. To this end, we assessed the effects of ECH and Mdivi-1, a selective inhibitor of dynamin-related protein (Drp1), in a rat model of chronic cervical cord compression and activated BV2 cells. Our results showed that rats with Mdivi-1 intervention had improved motor function compared with vehicle-treated rats. Indeed, Mdivi-1 treatment attenuated pro-inflammatory cytokine expression, as well as activation of the nod-like receptor family pyrin domain-containing 3 (NLRP3) inflammasome, nuclear transcription factor-κB (NF-κB), and Drp1 in lesions. Compared with vehicle-treated rats, compression sites of Mdivi-1-treated animals exhibited elongated mitochondrial morphologies and reduced reactive oxygen species (ROS). Similarly, ECH-treated rats exhibited neurological recovery and suppression of inflammatory response or related signals in the lesion area after treatment. Interestingly, ECH treatment partly reversed aberrant mitochondrial fragmentation and oxidative stress within the lesion area. In vitro data suggested that ECH suppressed activated microglia by modulating activation of the NLRP3 inflammasome and NF-κB signaling. Furthermore, we observed that ECH markedly inhibited Drp1 translocation onto mitochondria, whereby it regulated mitochondrial dynamics and ROS production, which act as regulators of NLRP3 inflammasome activation and NF-κB signaling. Thus, our findings reveal that mitochondrial dynamics modulate inflammatory responses during CSM. Moreover, ECH may attenuate neuroinflammation in rats subjected to chronic cervical cord compression by regulating Drp1-dependent mitochondrial fission and activation of downstream signaling.
Collapse
Affiliation(s)
- Longyun Zhou
- Spine Disease Institute, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China; Key Laboratory of Theory and Therapy of Muscles and Bones, Ministry of Education, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China; Rehabilitation Medicine College, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Min Yao
- Spine Disease Institute, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China; Key Laboratory of Theory and Therapy of Muscles and Bones, Ministry of Education, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China
| | - Zirui Tian
- Spine Disease Institute, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China; Key Laboratory of Theory and Therapy of Muscles and Bones, Ministry of Education, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China
| | - Yongjia Song
- Spine Disease Institute, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China; Key Laboratory of Theory and Therapy of Muscles and Bones, Ministry of Education, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China
| | - Yueli Sun
- Spine Disease Institute, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China; Key Laboratory of Theory and Therapy of Muscles and Bones, Ministry of Education, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China
| | - Jie Ye
- Department of Orthopedics and Traumatology, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China
| | - Gan Li
- Spine Disease Institute, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China; Key Laboratory of Theory and Therapy of Muscles and Bones, Ministry of Education, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China
| | - Kim Sia Sng
- Spine Disease Institute, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China; Key Laboratory of Theory and Therapy of Muscles and Bones, Ministry of Education, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China
| | - Leqin Xu
- Xiamen Hospital of Traditional Chinese Medicine, Fujian, 361009, China
| | - Xuejun Cui
- Spine Disease Institute, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China; Key Laboratory of Theory and Therapy of Muscles and Bones, Ministry of Education, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China.
| | - Yongjun Wang
- Spine Disease Institute, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China; Key Laboratory of Theory and Therapy of Muscles and Bones, Ministry of Education, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China.
| |
Collapse
|
52
|
Perry CJ, Warren EC, Damstra-Oddy JL, Storey C, Francione LM, Annesley SJ, Fisher PR, Müller-Taubenberger A, Williams RSB. A Dictyostelium discoideum mitochondrial fluorescent tagging vector that does not affect respiratory function. Biochem Biophys Rep 2020; 22:100751. [PMID: 32258439 PMCID: PMC7109396 DOI: 10.1016/j.bbrep.2020.100751] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 03/05/2020] [Accepted: 03/10/2020] [Indexed: 02/01/2023] Open
Abstract
Visualizing mitochondria in living Dictyostelium discoideum cells using fluorescent dyes is often problematic due to variability in staining, metabolism of the dyes, and unknown potential effects of the dyes on mitochondrial function. We show that fluorescent labelling of mitochondria, using an N-terminal mitochondrial localization sequence derived from the D. discoideum protein GcvH1 (glycine cleavage system H1) attached to a red fluorescent protein enables clear mitochondrial imaging. We also show that this labelling has no effect upon mitochondria load or respiratory function.
Collapse
Affiliation(s)
- Christopher J Perry
- Centre for Biomedical Sciences, School of Biological Sciences, Royal Holloway University of London, Egham, Surrey, TW20 0EX, UK
| | - Eleanor C Warren
- Centre for Biomedical Sciences, School of Biological Sciences, Royal Holloway University of London, Egham, Surrey, TW20 0EX, UK
| | - Joseph L Damstra-Oddy
- Centre for Biomedical Sciences, School of Biological Sciences, Royal Holloway University of London, Egham, Surrey, TW20 0EX, UK
| | - Claire Storey
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Melbourne, Victoria, 3086, Australia
| | - Lisa M Francione
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Melbourne, Victoria, 3086, Australia
| | - Sarah J Annesley
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Melbourne, Victoria, 3086, Australia
| | - Paul R Fisher
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Melbourne, Victoria, 3086, Australia
| | | | - Robin S B Williams
- Centre for Biomedical Sciences, School of Biological Sciences, Royal Holloway University of London, Egham, Surrey, TW20 0EX, UK
| |
Collapse
|
53
|
Somasundaram L, Levy S, Hussein AM, Ehnes DD, Mathieu J, Ruohola-Baker H. Epigenetic metabolites license stem cell states. Curr Top Dev Biol 2020; 138:209-240. [PMID: 32220298 DOI: 10.1016/bs.ctdb.2020.02.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
It has become clear during recent years that stem cells undergo metabolic remodeling during their activation process. While these metabolic switches take place in pluripotency as well as adult stem cell populations, the rules that govern the switch are not clear. In this review, we summarize some of the transitions in adult and pluripotent cell types and will propose that the key function in this process is the generation of epigenetic metabolites that govern critical epigenetic modifications, and therefore stem cell states.
Collapse
Affiliation(s)
- Logeshwaran Somasundaram
- Department of Biochemistry, University of Washington, Seattle, WA, United States; Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, United States
| | - Shiri Levy
- Department of Biochemistry, University of Washington, Seattle, WA, United States; Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, United States
| | - Abdiasis M Hussein
- Department of Biochemistry, University of Washington, Seattle, WA, United States; Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, United States
| | - Devon D Ehnes
- Department of Biochemistry, University of Washington, Seattle, WA, United States; Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, United States
| | - Julie Mathieu
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, United States; Department of Comparative Medicine, University of Washington, Seattle, WA, United States
| | - Hannele Ruohola-Baker
- Department of Biochemistry, University of Washington, Seattle, WA, United States; Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, United States.
| |
Collapse
|
54
|
Yu K, Matzapetakis M, Horvatić A, Terré M, Bach A, Kuleš J, Yeste N, Gómez N, Arroyo L, Rodríguez-Tomàs E, Peña R, Guillemin N, de Almeida AM, Eckersall PD, Bassols A. Metabolome and proteome changes in skeletal muscle and blood of pre-weaning calves fed leucine and threonine supplemented diets. J Proteomics 2020; 216:103677. [PMID: 32028040 DOI: 10.1016/j.jprot.2020.103677] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Revised: 01/21/2020] [Accepted: 02/02/2020] [Indexed: 01/07/2023]
Abstract
In pre-weaning calves, both leucine and threonine play important roles in growth and muscle metabolism. In this study, metabolomics, proteomics and clinical chemistry were used to assess the effects of leucine and threonine supplementation added to milk replacer on 14 newborn Holstein male calves: 7 were fed a control diet (Ctrl) and 7 were fed the Ctrl diet supplemented with 0.3% leucine and 0.3% threonine (LT) from 5.6 days of age to 53.6 days. At this time, blood and semitendinosus muscle biopsies were collected for analysis. Integrated metabolomics and proteomics showed that branched-chain amino acids (BCAA) degradation and mitochondrial oxidative metabolism (citrate cycle and respiratory chain) were the main activated pathways in muscle because of the supplementation. BCAA derivatives and metabolites related to lipid mobilization showed the major changes. The deleterious effects of activated oxidative phosphorylation were balanced by the upregulation of antioxidant proteins. An increase in protein synthesis was indicated by elevated aminoacyl-tRNA biosynthesis and increased S6 ribosomal protein phosphorylation in skeletal muscle. In conclusion, LT group showed greater BCAA availability and mitochondrial oxidative activity; as the muscle cells undergo greater aerobic metabolism, antioxidant defenses were activated to compensate for possible cell damage. Data are available via ProteomeXchange (PXD016098). SIGNIFICANCE: Leucine and threonine are essential amino acids for the pre-weaning calf, being of high importance for growth. In this study, we found that leucine and threonine supplementation of milk replacer to feed pre-weaning calves led to differences in the proteome, metabolome and clinical chemistry analytes in skeletal muscle and plasma, albeit no differences in productive performance were recorded. This study extends our understanding on the metabolism in dairy calves and helps optimizing their nutritional status.
Collapse
Affiliation(s)
- Kuai Yu
- Departament de Bioquímica i Biologia Molecular, Facultat de Veterinària, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193 Barcelona, Spain
| | - Manolis Matzapetakis
- ITQB NOVA, Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Oeiras, Portugal
| | - Anita Horvatić
- ERA Chair Team, Faculty of Veterinary Medicine, University of Zagreb, Heinzelova 55, 10000 Zagreb, Croatia
| | - Marta Terré
- Departament of Ruminant Production, Institut de Recerca i Tecnologia Agroalimentàries Caldes de Montbui, 08140 Barcelona, Spain
| | - Alex Bach
- Departament of Ruminant Production, Institut de Recerca i Tecnologia Agroalimentàries Caldes de Montbui, 08140 Barcelona, Spain; Catalan Institution for Research and Advanced Studies (ICREA), Barcelona, Spain
| | - Josipa Kuleš
- ERA Chair Team, Faculty of Veterinary Medicine, University of Zagreb, Heinzelova 55, 10000 Zagreb, Croatia
| | - Natalia Yeste
- Departament de Bioquímica i Biologia Molecular, Facultat de Veterinària, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193 Barcelona, Spain
| | - Néstor Gómez
- Departament de Bioquímica i Biologia Molecular, Facultat de Veterinària, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193 Barcelona, Spain
| | - Laura Arroyo
- Departament de Bioquímica i Biologia Molecular, Facultat de Veterinària, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193 Barcelona, Spain
| | | | - Raquel Peña
- Servei de Bioquímica Clínica Veterinària, Facultat de Veterinària, Universitat Autònoma de Barcelona Cerdanyola del Vallès, 08193 Barcelona, Spain
| | - Nicolas Guillemin
- ERA Chair Team, Faculty of Veterinary Medicine, University of Zagreb, Heinzelova 55, 10000 Zagreb, Croatia
| | - André M de Almeida
- LEAF, Instituto Superior de Agronomia, Universidade de Lisboa, Lisbon, Portugal
| | - Peter David Eckersall
- ERA Chair Team, Faculty of Veterinary Medicine, University of Zagreb, Heinzelova 55, 10000 Zagreb, Croatia; Institute of Biodiversity, Animal Health and Comparative Medicine, University of Glasgow, Glasgow, UK
| | - Anna Bassols
- Departament de Bioquímica i Biologia Molecular, Facultat de Veterinària, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193 Barcelona, Spain; Servei de Bioquímica Clínica Veterinària, Facultat de Veterinària, Universitat Autònoma de Barcelona Cerdanyola del Vallès, 08193 Barcelona, Spain.
| |
Collapse
|
55
|
Gu SH, Chen CH. Reactive oxygen species-mediated bombyxin signaling in Bombyx mori. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2020; 117:103279. [PMID: 31756435 DOI: 10.1016/j.ibmb.2019.103279] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 11/06/2019] [Accepted: 11/12/2019] [Indexed: 06/10/2023]
Abstract
In the present study, we demonstrated that bombyxin, an insect insulin-like peptide, modulated ecdysteroidogenesis in Bombyx mori prothoracic glands (PGs) through redox signaling. Our results showed that bombyxin treatment resulted in a transient increase in intracellular reactive oxygen species (ROS) concentration, as measured using 2',7'-dichlorofluorescin diacetate (DCFDA), an oxidation-sensitive fluorescent probe. The antioxidant N-acetylcysteine (NAC) abolished the bombyxin-induced increase in fluorescence in Bombyx PGs. Furthermore, bombyxin-induced ROS production was inhibited by mitochondrial oxidative phosphorylation inhibitors (rotenone and antimycin A), indicating mitochondria-mediated ROS production. The stimulation of ROS production in response to bombyxin appears to undergo development-specific changes. We further investigated the action mechanism of bombyxin-stimulated ROS signaling. Results showed that in the presence of either NAC, rotenone, or antimycin A, bombyxin-stimulated phosphorylation of insulin receptor, Akt, and 4E-binding protein (4E-BP) was blocked and bombyxin-stimulated ecdysteroidogenesis in PGs was greatly inhibited. From these results, we conclude that ROS signaling appears to be involved in bombyxin-stimulated ecdysteroidogenesis of PGs in B. mori by modulating the phosphorylation of insulin receptor, Akt, and 4E-BP. To our knowledge, this is the first demonstration of redox regulation in insulin signaling in an insect system.
Collapse
Affiliation(s)
- Shi-Hong Gu
- Department of Biology, National Museum of Natural Science, 1 Kuan-Chien Road, Taichung, 404, Taiwan, ROC.
| | - Chien-Hung Chen
- Chung Hwa University of Medical Technology, 89 Wen-Hwa 1st Road, Jen-Te Township, Tainan County, 717, Taiwan, ROC
| |
Collapse
|
56
|
Aplak E, von Montfort C, Haasler L, Stucki D, Steckel B, Reichert AS, Stahl W, Brenneisen P. CNP mediated selective toxicity on melanoma cells is accompanied by mitochondrial dysfunction. PLoS One 2020; 15:e0227926. [PMID: 31951630 PMCID: PMC6968876 DOI: 10.1371/journal.pone.0227926] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Accepted: 01/02/2020] [Indexed: 12/16/2022] Open
Abstract
Cerium (Ce) oxide nanoparticles (CNP; nanoceria) are reported to have cytotoxic effects on certain cancerous cell lines, while at the same concentration they show no cytotoxicity on normal (healthy) cells. Redox-active CNP exhibit both selective prooxidative as well as antioxidative properties. The former is proposed to be responsible for impairment of tumor growth and invasion and the latter for rescuing normal cells from reactive oxygen species (ROS)-induced damage. Here we address possible underlying mechanisms of prooxidative effects of CNP in a metastatic human melanoma cell line. Malignant melanoma is the most aggressive form of skin cancer, and once it becomes metastatic the prognosis is very poor. We have shown earlier that CNP selectively kill A375 melanoma cells by increasing intracellular ROS levels, whose basic amount is significantly higher than in the normal (healthy) counterpart, the melanocytes. Here we show that CNP initiate a mitochondrial increase of ROS levels accompanied by an increase in mitochondrial thiol oxidation. Furthermore, we observed CNP-induced changes in mitochondrial bioenergetics, dynamics, and cristae morphology demonstrating mitochondrial dysfunction which finally led to tumor cell death. CNP-induced cell death is abolished by administration of PEG-conjugated catalase. Overall, we propose that cerium oxide nanoparticles mediate cell death via hydrogen peroxide production linked to mitochondrial dysfunction.
Collapse
Affiliation(s)
- Elif Aplak
- Institute of Biochemistry and Molecular Biology I, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Claudia von Montfort
- Institute of Biochemistry and Molecular Biology I, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
- * E-mail:
| | - Lisa Haasler
- Institute of Biochemistry and Molecular Biology I, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - David Stucki
- Institute of Biochemistry and Molecular Biology I, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Bodo Steckel
- Department of Molecular Cardiology, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Andreas S. Reichert
- Institute of Biochemistry and Molecular Biology I, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Wilhelm Stahl
- Institute of Biochemistry and Molecular Biology I, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Peter Brenneisen
- Institute of Biochemistry and Molecular Biology I, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| |
Collapse
|
57
|
Mitochondrial DNA: A Key Regulator of Anti-Microbial Innate Immunity. Genes (Basel) 2020; 11:genes11010086. [PMID: 31940818 PMCID: PMC7017290 DOI: 10.3390/genes11010086] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Revised: 01/09/2020] [Accepted: 01/10/2020] [Indexed: 12/25/2022] Open
Abstract
During the last few years, mitochondrial DNA has attained much attention as a modulator of immune responses. Due to common evolutionary origin, mitochondrial DNA shares various characteristic features with DNA of bacteria, as it consists of a remarkable number of unmethylated DNA as 2′-deoxyribose cytidine-phosphate-guanosine (CpG) islands. Due to this particular feature, mitochondrial DNA seems to be recognized as a pathogen-associated molecular pattern by the innate immune system. Under the normal physiological situation, mitochondrial DNA is enclosed in the double membrane structure of mitochondria. However, upon pathological conditions, it is usually released into the cytoplasm. Growing evidence suggests that this cytosolic mitochondrial DNA induces various innate immune signaling pathways involving NLRP3, toll-like receptor 9, and stimulator of interferon genes (STING) signaling, which participate in triggering downstream cascade and stimulating to produce effector molecules. Mitochondrial DNA is responsible for inflammatory diseases after stress and cellular damage. In addition, it is also involved in the anti-viral and anti-bacterial innate immunity. Thus, instead of entire mitochondrial importance in cellular metabolism and energy production, mitochondrial DNA seems to be essential in triggering innate anti-microbial immunity. Here, we describe existing knowledge on the involvement of mitochondrial DNA in the anti-microbial immunity by modulating the various immune signaling pathways.
Collapse
|
58
|
Redox Signaling from Mitochondria: Signal Propagation and Its Targets. Biomolecules 2020; 10:biom10010093. [PMID: 31935965 PMCID: PMC7023504 DOI: 10.3390/biom10010093] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Revised: 01/02/2020] [Accepted: 01/02/2020] [Indexed: 02/07/2023] Open
Abstract
Progress in mass spectroscopy of posttranslational oxidative modifications has enabled researchers to experimentally verify the concept of redox signaling. We focus here on redox signaling originating from mitochondria under physiological situations, discussing mechanisms of transient redox burst in mitochondria, as well as the possible ways to transfer such redox signals to specific extramitochondrial targets. A role of peroxiredoxins is described which enables redox relay to other targets. Examples of mitochondrial redox signaling are discussed: initiation of hypoxia-inducible factor (HIF) responses; retrograde redox signaling to PGC1α during exercise in skeletal muscle; redox signaling in innate immune cells; redox stimulation of insulin secretion, and other physiological situations.
Collapse
|
59
|
Veredas FJ, Urda D, Subirats JL, Cantón FR, Aledo JC. Combining feature engineering and feature selection to improve the prediction of methionine oxidation sites in proteins. Neural Comput Appl 2020. [DOI: 10.1007/s00521-018-3655-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
60
|
Trist BG, Hare DJ, Double KL. Oxidative stress in the aging substantia nigra and the etiology of Parkinson's disease. Aging Cell 2019; 18:e13031. [PMID: 31432604 PMCID: PMC6826160 DOI: 10.1111/acel.13031] [Citation(s) in RCA: 367] [Impact Index Per Article: 73.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Revised: 07/05/2019] [Accepted: 08/07/2019] [Indexed: 12/13/2022] Open
Abstract
Parkinson's disease prevalence is rapidly increasing in an aging global population. With this increase comes exponentially rising social and economic costs, emphasizing the immediate need for effective disease‐modifying treatments. Motor dysfunction results from the loss of dopaminergic neurons in the substantia nigra pars compacta and depletion of dopamine in the nigrostriatal pathway. While a specific biochemical mechanism remains elusive, oxidative stress plays an undeniable role in a complex and progressive neurodegenerative cascade. This review will explore the molecular factors that contribute to the high steady‐state of oxidative stress in the healthy substantia nigra during aging, and how this chemical environment renders neurons susceptible to oxidative damage in Parkinson's disease. Contributing factors to oxidative stress during aging and as a pathogenic mechanism for Parkinson's disease will be discussed within the context of how and why therapeutic approaches targeting cellular redox activity in this disorder have, to date, yielded little therapeutic benefit. We present a contemporary perspective on the central biochemical contribution of redox imbalance to Parkinson's disease etiology and argue that improving our ability to accurately measure oxidative stress, dopaminergic neurotransmission and cell death pathways in vivo is crucial for both the development of new therapies and the identification of novel disease biomarkers.
Collapse
Affiliation(s)
- Benjamin G. Trist
- Brain and Mind Centre and Discipline of Pharmacology, Faculty of Medical and Health The University of Sydney Sydney NSW Australia
| | - Dominic J. Hare
- The Florey Institute of Neuroscience and Mental Health The University of Melbourne Parkville Vic. Australia
- Elemental Bio‐imaging Facility University of Technology Sydney Broadway NSW Australia
| | - Kay L. Double
- Brain and Mind Centre and Discipline of Pharmacology, Faculty of Medical and Health The University of Sydney Sydney NSW Australia
| |
Collapse
|
61
|
Gao Y, Kim S, Lee YI, Lee J. Cellular Stress-Modulating Drugs Can Potentially Be Identified by in Silico Screening with Connectivity Map (CMap). Int J Mol Sci 2019; 20:ijms20225601. [PMID: 31717493 PMCID: PMC6888006 DOI: 10.3390/ijms20225601] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 11/05/2019] [Accepted: 11/06/2019] [Indexed: 12/27/2022] Open
Abstract
Accompanied by increased life span, aging-associated diseases, such as metabolic diseases and cancers, have become serious health threats. Recent studies have documented that aging-associated diseases are caused by prolonged cellular stresses such as endoplasmic reticulum (ER) stress, mitochondrial stress, and oxidative stress. Thus, ameliorating cellular stresses could be an effective approach to treat aging-associated diseases and, more importantly, to prevent such diseases from happening. However, cellular stresses and their molecular responses within the cell are typically mediated by a variety of factors encompassing different signaling pathways. Therefore, a target-based drug discovery method currently being used widely (reverse pharmacology) may not be adequate to uncover novel drugs targeting cellular stresses and related diseases. The connectivity map (CMap) is an online pharmacogenomic database cataloging gene expression data from cultured cells treated individually with various chemicals, including a variety of phytochemicals. Moreover, by querying through CMap, researchers may screen registered chemicals in silico and obtain the likelihood of drugs showing a similar gene expression profile with desired and chemopreventive conditions. Thus, CMap is an effective genome-based tool to discover novel chemopreventive drugs.
Collapse
Affiliation(s)
- Yurong Gao
- Department of New Biology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Korea; (Y.G.); (S.K.)
| | - Sungwoo Kim
- Department of New Biology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Korea; (Y.G.); (S.K.)
| | - Yun-Il Lee
- Well Aging Research Center, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Korea
- Correspondence: (Y.-I.L.); (J.L.)
| | - Jaemin Lee
- Department of New Biology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Korea; (Y.G.); (S.K.)
- Correspondence: (Y.-I.L.); (J.L.)
| |
Collapse
|
62
|
Li Y, Liu W, Zhong H, Zhang HL, Xia Y. Redox-sensitive bZIP68 plays a role in balancing stress tolerance with growth in Arabidopsis. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2019; 100:768-783. [PMID: 31348568 DOI: 10.1111/tpj.14476] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Revised: 07/06/2019] [Accepted: 07/12/2019] [Indexed: 06/10/2023]
Abstract
Perturbation of the cellular redox state by stress conditions is sensed by redox-sensitive proteins so that the cell can physiologically respond to stressors. However, the mechanisms linking sensing to response remain poorly understood in plants. Here we report that the transcription factor bZIP68 underwent in vivo oxidation in Arabidopsis cells under oxidative stress which is dependent on its redox-sensitive Cys320 residue. bZIP68 is primarily localized to the nucleus under normal growth conditions in Arabidopsis seedlings. Oxidative stress reduces its accumulation in the nucleus and increases its cytosolic localization. Chromatin immunoprecipitation followed by sequencing (ChIP-seq) revealed that bZIP68 primarily binds to promoter regions containing the core G-box (CACGTG) or G-box-like motif of the genes involved in abiotic and biotic stress responses, photosynthesis, biosynthetic processes, and transcriptional regulation. The bzip68 mutant displayed slower growth under normal conditions but enhanced tolerance to oxidative stress. The results from the ChIP-seq and phenotypic and transcriptome comparison between the bzip68 mutant and wildtype indicate that bZIP68 normally suppresses expression of stress tolerance genes and promotes expression of growth-related genes, whereas its inactivation enhances stress tolerance but suppresses growth. bZIP68 might balance stress tolerance with growth through the extent of its oxidative inactivation according to the environment.
Collapse
Affiliation(s)
- Yimin Li
- Department of Biology, Hong Kong Baptist University, Kowloon, Hong Kong
- College of Pharmacy, Shaanxi Qinling Application and Development and Engineering Center of Chinese Herbal Medicine, Shaanxi University of Chinese Medicine, Xi'an, China
| | - Wuzhen Liu
- Department of Biology, Hong Kong Baptist University, Kowloon, Hong Kong
| | - Huan Zhong
- Department of Biology, Hong Kong Baptist University, Kowloon, Hong Kong
| | - Hai-Lei Zhang
- Department of Biology, Hong Kong Baptist University, Kowloon, Hong Kong
| | - Yiji Xia
- Department of Biology, Hong Kong Baptist University, Kowloon, Hong Kong
- State Key Laboratory of Agricultural Biotechnology, Chinese University of Hong Kong, Shatin, Hong Kong
- State Key Laboratory of Environmental and Biological Analysis, Hong Kong Baptist University, Kowloon, Hong Kong
| |
Collapse
|
63
|
Cho B, Kim T, Huh YJ, Lee J, Lee YI. Amelioration of Mitochondrial Quality Control and Proteostasis by Natural Compounds in Parkinson's Disease Models. Int J Mol Sci 2019; 20:ijms20205208. [PMID: 31640129 PMCID: PMC6829248 DOI: 10.3390/ijms20205208] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Revised: 10/17/2019] [Accepted: 10/17/2019] [Indexed: 12/18/2022] Open
Abstract
Parkinson’s disease (PD) is a well-known age-related neurodegenerative disorder associated with longer lifespans and rapidly aging populations. The pathophysiological mechanism is a complex progress involving cellular damage such as mitochondrial dysfunction and protein homeostasis. Age-mediated degenerative neurological disorders can reduce the quality of life and also impose economic burdens. Currently, the common treatment is replacement with levodopa to address low dopamine levels; however, this does not halt the progression of PD and is associated with adverse effects, including dyskinesis. In addition, elderly patients can react negatively to treatment with synthetic neuroprotection agents. Recently, natural compounds such as phytochemicals with fewer side effects have been reported as candidate treatments of age-related neurodegenerative diseases. This review focuses on mitochondrial dysfunction, oxidative stress, hormesis, proteostasis, the ubiquitin‒proteasome system, and autophagy (mitophagy) to explain the neuroprotective effects of using natural products as a therapeutic strategy. We also summarize the efforts to use natural extracts to develop novel pharmacological candidates for treatment of age-related PD.
Collapse
Affiliation(s)
- Bongki Cho
- Division of Biotechnology, Daegu Gyeongbuk Institute of Science and Technology, Daegu 42988, Korea.
| | - Taeyun Kim
- Department of New Biology, Daegu Gyeongbuk Institute of Science and Technology, Daegu 42988, Korea.
- Well Aging Research Center, Daegu Gyeongbuk Institute of Science and Technology, Daegu 42988, Korea.
| | - Yu-Jin Huh
- Department of New Biology, Daegu Gyeongbuk Institute of Science and Technology, Daegu 42988, Korea.
- Well Aging Research Center, Daegu Gyeongbuk Institute of Science and Technology, Daegu 42988, Korea.
| | - Jaemin Lee
- Department of New Biology, Daegu Gyeongbuk Institute of Science and Technology, Daegu 42988, Korea.
| | - Yun-Il Lee
- Division of Biotechnology, Daegu Gyeongbuk Institute of Science and Technology, Daegu 42988, Korea.
- Well Aging Research Center, Daegu Gyeongbuk Institute of Science and Technology, Daegu 42988, Korea.
| |
Collapse
|
64
|
Abstract
Nutrient overload occurs worldwide as a consequence of the modern diet pattern and the physical inactivity that sometimes accompanies it. Cells initiate multiple protective mechanisms to adapt to elevated intracellular metabolites and restore metabolic homeostasis, but irreversible injury to the cells can occur in the event of prolonged nutrient overload. Many studies have advanced the understanding of the different detrimental effects of nutrient overload; however, few reports have made connections and given the full picture of the impact of nutrient overload on cellular metabolism. In this review, detailed changes in metabolic and energy homeostasis caused by chronic nutrient overload, as well as their associations with the development of metabolic disorders, are discussed. Overnutrition-induced changes in key organelles and sensors rewire cellular bioenergetic pathways and facilitate the shift of the metabolic state toward biosynthesis, thereby leading to the onset of various metabolic disorders, which are essentially the downstream manifestations of a misbalanced metabolic equilibrium. Based on these mechanisms, potential therapeutic targets for metabolic disorders and new research directions are proposed.
Collapse
Affiliation(s)
- Haowen Qiu
- Department of Nutrition and Health Sciences and Department of Food Science and Technology, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| | - Vicki Schlegel
- Department of Nutrition and Health Sciences and Department of Food Science and Technology, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| |
Collapse
|
65
|
Skrajnowska D, Bobrowska-Korczak B. Role of Zinc in Immune System and Anti-Cancer Defense Mechanisms. Nutrients 2019; 11:E2273. [PMID: 31546724 PMCID: PMC6835436 DOI: 10.3390/nu11102273] [Citation(s) in RCA: 164] [Impact Index Per Article: 32.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2019] [Revised: 09/13/2019] [Accepted: 09/18/2019] [Indexed: 02/06/2023] Open
Abstract
The human body cannot store zinc reserves, so a deficiency can arise relatively quickly, e.g., through an improper diet. Severe zinc deficiency is rare, but mild deficiencies are common around the world. Many epidemiological studies have shown a relationship between the zinc content in the diet and the risk of cancer. The anti-cancer effect of zinc is most often associated with its antioxidant properties. However, this is just one of many possibilities, including the influence of zinc on the immune system, transcription factors, cell differentiation and proliferation, DNA and RNA synthesis and repair, enzyme activation or inhibition, the regulation of cellular signaling, and the stabilization of the cell structure and membranes. This study presents selected issues regarding the current knowledge of anti-cancer mechanisms involving this element.
Collapse
Affiliation(s)
- Dorota Skrajnowska
- Department of Bromatology, Medical University of Warsaw, Banacha 1, 02-097 Warsaw, Poland.
| | | |
Collapse
|
66
|
Redox Balance Correlates with Nutritional Status among Patients with End-Stage Renal Disease Treated with Maintenance Hemodialysis. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:6309465. [PMID: 31583040 PMCID: PMC6748197 DOI: 10.1155/2019/6309465] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 07/16/2019] [Accepted: 08/16/2019] [Indexed: 12/12/2022]
Abstract
Over 50% of end-stage renal disease (ESRD) patients die of cardiovascular disease. ESRD patients treated with maintenance hemodialysis are repeatedly exposed to oxidative stress. The aim of the study was to find the relationship between lifestyle factors, nutritional status, calcium-phosphate metabolism, and selected redox parameters such as glutathione peroxidase (GPx), glutathione reductase (GR), superoxide dismutase (SOD), uric acid (UA), and total antioxidant capacity expressed as ferric reducing antioxidant power (FRAP). The study included 97 ESRD hemodialysis patients and 42 controls with no renal disease. Patients were asked to complete a questionnaire which gathered information on their physical activity, hours of sleep, smoking, and frequency of fruit and vegetable intake; the blood samples were then drawn before the midweek dialysis session. The ESRD patients had lower levels of GR, GPx, and SOD activity, a lower level of FRAP, and a higher UA concentration than the control group. The FRAP value decreased with age (ρ = −0.32, p = 0.001); smokers had a significantly lower SOD activity in comparison to nonsmokers (p = 0.03). In the ESRD patients, FRAP and UA correlated with both albumin (ρ = 0.26, p = 0.011; ρ = 0.41, p = 0.006, respectively) and prealbumin (ρ = 0.34, p ≤ 0.001; ρ = 0.28, p = 0.006, respectively), whereas UA, GR, GPx, and SOD correlated with calcium, UA, GR, and GPx with phosphate level. Based on the findings, there are weak associations between nutritional status and selected redox parameters in hemodialyzed patients. Further studies are needed to establish if diet modifications and adequate nutritional status can positively impact the antioxidant capacity in this group of patients.
Collapse
|
67
|
Yang L, Hong Q, Xu SG, Kuang XY, Di GH, Liu GY, Wu J, Shao ZM, Yu SJ. Downregulation of transgelin 2 promotes breast cancer metastasis by activating the reactive oxygen species/nuclear factor‑κB signaling pathway. Mol Med Rep 2019; 20:4045-4258. [PMID: 31485630 PMCID: PMC6797978 DOI: 10.3892/mmr.2019.10643] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 07/17/2019] [Indexed: 12/21/2022] Open
Abstract
Transgelin 2 (TAGLN2) is a cytoskeletal protein of the calponin family. Abnormal expression of TAGLN2 was observed in various types of cancer. Our previous study reported that TAGLN2 expression was reduced in lymph node-positive breast cancer patients; however, the role of TAGLN2 in breast cancer metastasis remains unknown. In the present study, the role of TAGLN2 in breast cancer metastasis was investigated in vitro and in vivo via Transwell migration, luciferase and flow cytometry assays, and a mouse xenograft model. Proteins interacting with TAGLN2 were identified via co-immunoprecipitation assays and liquid chromatography/mass spectrometry, and the signaling pathway associated with the effects of TAGLN2 was investigated. Additionally, western blotting and reverse transcription-quantitative polymerase chain reaction were performed to further explore the potential pathway in which TAGLN2 may be involved and the mechanism underlying its effects in breast cancer metastasis. The present study reported that TAGLN2 expression was increased by 11.4-fold in patients without distant metastasis compared with those positive for distant metastasis. Knockdown of TAGLN2 resulted in increased cell migration in vitro and promoted lung metastasis in vivo. Additionally, overexpression of TAGLN2 suppressed lung metastasis in a mouse model. Peroxiredoxin 1 (PRDX1), an important reactive oxygen species (ROS) regulator, was revealed to interact with TAGLN2. In addition, mitochondrial redistribution and PRDX1 downregulation were reported following TAGLN2 silencing, which promoted ROS production and nuclear factor (NF)-κB activation in breast cancer cells. This induced the expression of metastasis-associated genes, including C-X-C chemokine receptor 4, matrix metalloproteinase (MMP)1 and MMP2. The present study proposed TAGLN2 to function as a tumor suppressor and that loss of TAGLN2 may promote the metastasis of breast cancer by activating the ROS/NF-κB signaling pathway.
Collapse
Affiliation(s)
- Liu Yang
- Department of Breast Surgery, Key Laboratory of Breast Cancer in Shanghai, Fudan University Shanghai Cancer Center, Shanghai 200032, P.R. China
| | - Qi Hong
- Department of Breast Surgery, Key Laboratory of Breast Cancer in Shanghai, Fudan University Shanghai Cancer Center, Shanghai 200032, P.R. China
| | - Si-Guang Xu
- Department of Breast Surgery, Key Laboratory of Breast Cancer in Shanghai, Fudan University Shanghai Cancer Center, Shanghai 200032, P.R. China
| | - Xia-Ying Kuang
- Department of Breast Surgery, The First Affiliated Hospital, Sun Yat‑Sen University, Guangzhou, Guangdong 510080, P.R. China
| | - Gen-Hong Di
- Department of Breast Surgery, Key Laboratory of Breast Cancer in Shanghai, Fudan University Shanghai Cancer Center, Shanghai 200032, P.R. China
| | - Guang-Yu Liu
- Department of Breast Surgery, Key Laboratory of Breast Cancer in Shanghai, Fudan University Shanghai Cancer Center, Shanghai 200032, P.R. China
| | - Jiong Wu
- Department of Breast Surgery, Key Laboratory of Breast Cancer in Shanghai, Fudan University Shanghai Cancer Center, Shanghai 200032, P.R. China
| | - Zhi-Ming Shao
- Department of Breast Surgery, Key Laboratory of Breast Cancer in Shanghai, Fudan University Shanghai Cancer Center, Shanghai 200032, P.R. China
| | - San-Jian Yu
- Department of Breast Surgery, Key Laboratory of Breast Cancer in Shanghai, Fudan University Shanghai Cancer Center, Shanghai 200032, P.R. China
| |
Collapse
|
68
|
Zhang X, Jiang J, Chen Z, Cao M. Silibinin inhibited autophagy and mitochondrial apoptosis in pancreatic carcinoma by activating JNK/SAPK signaling. Pathol Res Pract 2019; 215:152530. [PMID: 31351801 DOI: 10.1016/j.prp.2019.152530] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Revised: 06/12/2019] [Accepted: 07/05/2019] [Indexed: 02/02/2023]
Abstract
BACKGROUND Previous investigation have indicated Silibinin induces apoptosis and JNK/SAPK in human pancreatic cancer cells. This study aims to evaluate the further mechanism of Silibinin in pancreatic cancer treatment. MATERIALS AND METHODS Human pancreatic cancer cell lines SW1990 was treated with Silibinin and/or JNK/SAPK inhibitor SP600125 followed by measurement of cell viability, apoptosis, autophagy, ROS and ATP, and western blotting. RESULTS Silibinin promoted cell viability and promoted cell apoptosis. The expression of ROS and ATP associated with mitochondrial function was also promoted by the treatment of silibinin. Silibinin also promoted autophagy in pancreatic cancer cells. All these biological effects of Silibinin can be reversed by JNK/SAPK inhibitor. CONCLUSIONS The biological effects regulated by Silibinin can be mediated by JNK/SAPK signaling. This provides a solid theoretical basis for the role of Silibinin in the treatment of pancreatic cancer.
Collapse
Affiliation(s)
- Xiaokai Zhang
- Department of General Surgery, The First People's Hospital of Nanyang City, Nanyang, Henan 473000, China.
| | - Jianwei Jiang
- Department of Biochemistry, Medical College, Jinan University, Guangzhou, Guangdong 510630, China
| | - Zhiwei Chen
- Department of General Surgery, The First Affiliated Hospital, Jinan University, Guangzhou, Guangdong 510630, China
| | - Mingrong Cao
- Department of General Surgery, The First Affiliated Hospital, Jinan University, Guangzhou, Guangdong 510630, China.
| |
Collapse
|
69
|
Musci RV, Hamilton KL, Linden MA. Exercise-Induced Mitohormesis for the Maintenance of Skeletal Muscle and Healthspan Extension. Sports (Basel) 2019; 7:E170. [PMID: 31336753 PMCID: PMC6681340 DOI: 10.3390/sports7070170] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 07/07/2019] [Accepted: 07/09/2019] [Indexed: 12/25/2022] Open
Abstract
Oxidative damage is one mechanism linking aging with chronic diseases including the progressive loss of skeletal muscle mass and function called sarcopenia. Thus, mitigating oxidative damage is a potential avenue to prevent or delay the onset of chronic disease and/or extend healthspan. Mitochondrial hormesis (mitohormesis) occurs when acute exposure to stress stimulates adaptive mitochondrial responses that improve mitochondrial function and resistance to stress. For example, an acute oxidative stress via mitochondrial superoxide production stimulates the activation of endogenous antioxidant gene transcription regulated by the redox sensitive transcription factor Nrf2, resulting in an adaptive hormetic response. In addition, acute stresses such as aerobic exercise stimulate the expansion of skeletal muscle mitochondria (i.e., mitochondrial biogenesis), constituting a mitohormetic response that protects from sarcopenia through a variety of mechanisms. This review summarized the effects of age-related declines in mitochondrial and redox homeostasis on skeletal muscle protein homeostasis and highlights the mitohormetic mechanisms by which aerobic exercise mitigates these age-related declines and maintains function. We discussed the potential efficacy of targeting the Nrf2 signaling pathway, which partially mediates adaptation to aerobic exercise, to restore mitochondrial and skeletal muscle function. Finally, we highlight knowledge gaps related to improving redox signaling and make recommendations for future research.
Collapse
Affiliation(s)
- Robert V Musci
- Department of Health and Exercise Science, Colorado State University, Fort Collins, CO 80523, USA.
| | - Karyn L Hamilton
- Department of Health and Exercise Science, Colorado State University, Fort Collins, CO 80523, USA
| | - Melissa A Linden
- Department of Health and Exercise Science, Colorado State University, Fort Collins, CO 80523, USA
| |
Collapse
|
70
|
Costantini D. Understanding diversity in oxidative status and oxidative stress: the opportunities and challenges ahead. ACTA ACUST UNITED AC 2019; 222:222/13/jeb194688. [PMID: 31266782 DOI: 10.1242/jeb.194688] [Citation(s) in RCA: 96] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Oxidative stress may be of profound biological relevance. In this Commentary, I discuss some key issues faced by the emerging field of oxidative stress ecology, and seek to provide interpretations and solutions. First, I show that the way in which we define oxidative stress has far-reaching implications for the interpretation of results, and that we need to distinguish between (1) a biochemical definition in terms of the molecular outcomes of oxidative stress (e.g. generation of oxidative damage) and (2) a biological definition in terms of the fitness consequences for the organism (e.g. effects on fertility). Second, I discuss the dangers of comparing different tissues and markers. Third, I highlight the need to pay more attention to the cross-talk between oxidative stress and other important physiological costs and functions; this will allow us to better understand the mechanistic basis of fitness costs. Fourth, I propose the 'redox signalling hypothesis' of life history to complement the current 'oxidative stress hypothesis' of life history. The latter states that oxidative damage underlies trade-offs because it affects traits like growth, reproduction or cell senescence. By contrast, the redox signalling hypothesis states that a trade-off between signalling and biochemical oxidative stress underlies the regulation of reactive oxygen species production and their subsequent control. Finally, I critically appraise our current knowledge of oxidative stress ecology, highlighting key research themes and providing an optimistic overview of future opportunities for the discipline to yield considerable insight into the ecological and evolutionary meaning of oxidative stress.
Collapse
Affiliation(s)
- David Costantini
- UMR 7221 CNRS/MNHN, Muséum National d'Histoire Naturelle, Sorbonne Universités, 7 rue Cuvier, 75005 Paris, France
| |
Collapse
|
71
|
Fetoni AR, Paciello F, Rolesi R, Paludetti G, Troiani D. Targeting dysregulation of redox homeostasis in noise-induced hearing loss: Oxidative stress and ROS signaling. Free Radic Biol Med 2019; 135:46-59. [PMID: 30802489 DOI: 10.1016/j.freeradbiomed.2019.02.022] [Citation(s) in RCA: 107] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 02/04/2019] [Accepted: 02/18/2019] [Indexed: 12/20/2022]
Abstract
Hearing loss caused by exposure to recreational and occupational noise remains a worldwide disabling condition and dysregulation of redox homeostasis is the hallmark of cochlear damage induced by noise exposure. In this review we discuss the dual function of ROS to both promote cell damage (oxidative stress) and cell adaptive responses (ROS signaling) in the cochlea undergoing a stressful condition such as noise exposure. We focus on animal models of noise-induced hearing loss (NIHL) and on the function of exogenous antioxidants to maintaining a physiological role of ROS signaling by distinguishing the effect of exogenous "direct" antioxidants (i.e. CoQ10, NAC), that react with ROS to decrease oxidative stress, from the exogenous "indirect" antioxidants (i.e. nutraceutics and phenolic compounds) that can activate cellular redox enzymes through the Keap1-Nrf2-ARE pathway. The anti-inflammatory properties of Nrf2 signaling are discussed in relation to the ROS/inflammation interplay in noise exposure. Unveiling the mechanisms of ROS regulating redox-associated signaling pathways is essential in providing relevant targets for innovative and effective therapeutic strategies against NIHL.
Collapse
Affiliation(s)
- Anna Rita Fetoni
- Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy; Institute of Otolaryngology, Università Cattolica del Sacro Cuore, Rome, Italy; CNR Institute of Cell Biology and Neurobiology, Monterotondo, Italy
| | - Fabiola Paciello
- Institute of Otolaryngology, Università Cattolica del Sacro Cuore, Rome, Italy; CNR Institute of Cell Biology and Neurobiology, Monterotondo, Italy
| | - Rolando Rolesi
- Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy; Institute of Otolaryngology, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Gaetano Paludetti
- Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy; Institute of Otolaryngology, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Diana Troiani
- Institute of Human Physiology, Università Cattolica del Sacro Cuore, Rome, Italy.
| |
Collapse
|
72
|
Abstract
Background Thermogenic adipocytes reorganize their metabolism during cold exposure. Metabolic reprogramming requires readily available bioenergetics substrates, such as glucose and fatty acids, to increase mitochondrial respiration and produce heat via the uncoupling protein 1 (UCP1). This condition generates a finely-tuned production of mitochondrial reactive oxygen species (ROS) that support non-shivering thermogenesis. Scope of review Herein, the findings underlining the mechanisms that regulate ROS production and control of the adaptive responses tuning thermogenesis in adipocytes are described. Furthermore, this review describes the metabolic responses to substrate availability and the consequence of mitochondrial failure to switch fuel oxidation in response to changes in nutrient availability. A framework to control mitochondrial ROS threshold to maximize non-shivering thermogenesis in adipocytes is provided. Major conclusions Thermogenesis synchronizes fuel oxidation with an acute and transient increase of mitochondrial ROS that promotes the activation of redox-sensitive thermogenic signaling cascade and UCP1. However, an overload of substrate flux to mitochondria causes a massive and damaging mitochondrial ROS production that affects mitochondrial flexibility. Finding novel thermogenic redox targets and manipulating ROS concentration in adipocytes appears to be a promising avenue of research for improving thermogenesis and counteracting metabolic diseases. Mitochondrial ROS support non-shivering thermogenesis. Thermogenic ROS are tightly related to mitochondrial metabolic reorganization. Uncontrolled mitochondrial ROS production is causative of metabolic inflexibility.
Collapse
|
73
|
Fine-tuning the neuroprotective and blood-brain barrier permeability profile of multi-target agents designed to prevent progressive mitochondrial dysfunction. Eur J Med Chem 2019; 167:525-545. [DOI: 10.1016/j.ejmech.2019.01.055] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 01/21/2019] [Accepted: 01/22/2019] [Indexed: 12/19/2022]
|
74
|
Antonucci S, Mulvey JF, Burger N, Di Sante M, Hall AR, Hinchy EC, Caldwell ST, Gruszczyk AV, Deshwal S, Hartley RC, Kaludercic N, Murphy MP, Di Lisa F, Krieg T. Selective mitochondrial superoxide generation in vivo is cardioprotective through hormesis. Free Radic Biol Med 2019; 134:678-687. [PMID: 30731114 PMCID: PMC6607027 DOI: 10.1016/j.freeradbiomed.2019.01.034] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Revised: 01/23/2019] [Accepted: 01/24/2019] [Indexed: 01/14/2023]
Abstract
Reactive oxygen species (ROS) have an equivocal role in myocardial ischaemia reperfusion injury. Within the cardiomyocyte, mitochondria are both a major source and target of ROS. We evaluate the effects of a selective, dose-dependent increase in mitochondrial ROS levels on cardiac physiology using the mitochondria-targeted redox cycler MitoParaquat (MitoPQ). Low levels of ROS decrease the susceptibility of neonatal rat ventricular myocytes (NRVMs) to anoxia/reoxygenation injury and also cause profound protection in an in vivo mouse model of ischaemia/reperfusion. However higher doses of MitoPQ resulted in a progressive alteration of intracellular [Ca2+] homeostasis and mitochondrial function in vitro, leading to dysfunction and death at high doses. Our data show that a primary increase in mitochondrial ROS can alter cellular function, and support a hormetic model in which low levels of ROS are cardioprotective while higher levels of ROS are cardiotoxic.
Collapse
MESH Headings
- Animals
- Animals, Newborn
- Apoptosis
- Disease Models, Animal
- Herbicides/pharmacology
- Hormesis
- Male
- Mice
- Mice, Inbred C57BL
- Mitochondria, Heart/drug effects
- Mitochondria, Heart/metabolism
- Mitochondria, Heart/pathology
- Myocardial Reperfusion Injury/metabolism
- Myocardial Reperfusion Injury/pathology
- Myocardial Reperfusion Injury/prevention & control
- Myocytes, Cardiac/cytology
- Myocytes, Cardiac/drug effects
- Myocytes, Cardiac/metabolism
- Paraquat/pharmacology
- Rats
- Rats, Wistar
- Superoxides/metabolism
Collapse
Affiliation(s)
- Salvatore Antonucci
- Department of Biomedical Sciences, University of Padova, 35131, Padova, Italy
| | - John F Mulvey
- Department of Medicine, University of Cambridge, Hills Road, Cambridge, CB2 0XY, UK
| | - Nils Burger
- Mitochondrial Biology Unit, University of Cambridge, Hills Road, Cambridge, CB2 0XY, UK
| | - Moises Di Sante
- Department of Biomedical Sciences, University of Padova, 35131, Padova, Italy
| | - Andrew R Hall
- Mitochondrial Biology Unit, University of Cambridge, Hills Road, Cambridge, CB2 0XY, UK
| | - Elizabeth C Hinchy
- Mitochondrial Biology Unit, University of Cambridge, Hills Road, Cambridge, CB2 0XY, UK
| | | | - Anja V Gruszczyk
- Mitochondrial Biology Unit, University of Cambridge, Hills Road, Cambridge, CB2 0XY, UK
| | - Soni Deshwal
- Department of Biomedical Sciences, University of Padova, 35131, Padova, Italy
| | | | - Nina Kaludercic
- Neuroscience Institute, National Research Council of Italy (CNR), 35131, Padova, Italy
| | - Michael P Murphy
- Mitochondrial Biology Unit, University of Cambridge, Hills Road, Cambridge, CB2 0XY, UK
| | - Fabio Di Lisa
- Department of Biomedical Sciences, University of Padova, 35131, Padova, Italy; Neuroscience Institute, National Research Council of Italy (CNR), 35131, Padova, Italy.
| | - Thomas Krieg
- Department of Medicine, University of Cambridge, Hills Road, Cambridge, CB2 0XY, UK.
| |
Collapse
|
75
|
Cariccio VL, Samà A, Bramanti P, Mazzon E. Mercury Involvement in Neuronal Damage and in Neurodegenerative Diseases. Biol Trace Elem Res 2019; 187:341-356. [PMID: 29777524 DOI: 10.1007/s12011-018-1380-4] [Citation(s) in RCA: 86] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Accepted: 05/07/2018] [Indexed: 12/11/2022]
Abstract
Neurodegenerative diseases such as Alzheimer's disease, Parkinson's disease, amyotrophic lateral sclerosis, and multiple sclerosis are characterized by a chronic and selective process of neuronal cell death. Although the causes of neurodegenerative diseases remain still unknown, it is now a well-established idea that more factors, such as genetic, endogenous, and environmental, are involved. Among environmental causes, the accumulation of mercury, a heavy metal considered a toxic agent, was largely studied as a probable factor involved in neurodegenerative disease course. Mercury exists in three main forms: elemental mercury, inorganic mercury, and organic mercury (methylmercury and ethylmercury). Sources of elemental mercury can be natural (volcanic emission) or anthropogenic (coal-fired electric utilities, waste combustion, hazardous-waste incinerators, and gold extraction). Moreover, mercury is still used as an antiseptic, as a medical preservative, and as a fungicide. Dental amalgam can emit mercury vapor. Mercury vapor, being highly volatile and lipid soluble, can cross the blood-brain barrier and the lipid cell membranes and can be accumulated into the cells in its inorganic forms. Also, methylmercury can pass through blood-brain and placental barriers, causing serious damage in the central nervous system. This review describes the toxic effects of mercury in cell cultures, in animal models, and in patients with neurodegenerative diseases. In vitro experiments showed that mercury exposure was principally involved in oxidative stress and apoptotic processes. Moreover, motor and cognitive impairment and neural loss have been confirmed in various studies performed in animal models. Finally, observational studies on patients with neurodegenerative diseases showed discordant data about a possible mercury involvement.
Collapse
Affiliation(s)
- Veronica Lanza Cariccio
- IRCCS Centro Neurolesi "Bonino Pulejo", Via Provinciale Palermo, Contrada Casazza, 98124, Messina, Italy
| | - Annalisa Samà
- IRCCS Centro Neurolesi "Bonino Pulejo", Via Provinciale Palermo, Contrada Casazza, 98124, Messina, Italy
| | - Placido Bramanti
- IRCCS Centro Neurolesi "Bonino Pulejo", Via Provinciale Palermo, Contrada Casazza, 98124, Messina, Italy
| | - Emanuela Mazzon
- IRCCS Centro Neurolesi "Bonino Pulejo", Via Provinciale Palermo, Contrada Casazza, 98124, Messina, Italy.
| |
Collapse
|
76
|
Smolders VF, Zodda E, Quax PHA, Carini M, Barberà JA, Thomson TM, Tura-Ceide O, Cascante M. Metabolic Alterations in Cardiopulmonary Vascular Dysfunction. Front Mol Biosci 2019; 5:120. [PMID: 30723719 PMCID: PMC6349769 DOI: 10.3389/fmolb.2018.00120] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Accepted: 12/31/2018] [Indexed: 12/14/2022] Open
Abstract
Cardiovascular diseases (CVD) are the leading cause of death worldwide. CVD comprise a range of diseases affecting the functionality of the heart and blood vessels, including acute myocardial infarction (AMI) and pulmonary hypertension (PH). Despite their different causative mechanisms, both AMI and PH involve narrowed or blocked blood vessels, hypoxia, and tissue infarction. The endothelium plays a pivotal role in the development of CVD. Disruption of the normal homeostasis of endothelia, alterations in the blood vessel structure, and abnormal functionality are essential factors in the onset and progression of both AMI and PH. An emerging theory proposes that pathological blood vessel responses and endothelial dysfunction develop as a result of an abnormal endothelial metabolism. It has been suggested that, in CVD, endothelial cell metabolism switches to higher glycolysis, rather than oxidative phosphorylation, as the main source of ATP, a process designated as the Warburg effect. The evidence of these alterations suggests that understanding endothelial metabolism and mitochondrial function may be central to unveiling fundamental mechanisms underlying cardiovascular pathogenesis and to identifying novel critical metabolic biomarkers and therapeutic targets. Here, we review the role of the endothelium in the regulation of vascular homeostasis and we detail key aspects of endothelial cell metabolism. We also describe recent findings concerning metabolic endothelial cell alterations in acute myocardial infarction and pulmonary hypertension, their relationship with disease pathogenesis and we discuss the future potential of pharmacological modulation of cellular metabolism in the treatment of cardiopulmonary vascular dysfunction. Although targeting endothelial cell metabolism is still in its infancy, it is a promising strategy to restore normal endothelial functions and thus forestall or revert the development of CVD in personalized multi-hit interventions at the metabolic level.
Collapse
Affiliation(s)
- Valérie Françoise Smolders
- Department of Biochemistry and Molecular Biology and Institute of Biomedicine (IBUB), Faculty of Biology, University of Barcelona, Barcelona, Spain
- Department of Pulmonary Medicine, Hospital Clínic-Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
- Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, Netherlands
- Department of Vascular Surgery, Leiden University Medical Center, Leiden, Netherlands
| | - Erika Zodda
- Department of Biochemistry and Molecular Biology and Institute of Biomedicine (IBUB), Faculty of Biology, University of Barcelona, Barcelona, Spain
- Department of Pharmaceutical Sciences, Università degli Studi di Milano, Milan, Italy
| | - Paul H. A. Quax
- Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, Netherlands
- Department of Vascular Surgery, Leiden University Medical Center, Leiden, Netherlands
| | - Marina Carini
- Department of Pharmaceutical Sciences, Università degli Studi di Milano, Milan, Italy
| | - Joan Albert Barberà
- Department of Pulmonary Medicine, Hospital Clínic-Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
- Centro de Investigación Biomédica en Red (CIBER) de Enfermedades Respiratorias, Madrid, Spain
| | - Timothy M. Thomson
- Institute for Molecular Biology of Barcelona, National Research Council (IBMB-CSIC), Barcelona, Spain
- Centro de Investigación Biomédica en Red (CIBER) de Enfermedades Hepáticas y Digestivas, Madrid, Spain
| | - Olga Tura-Ceide
- Department of Pulmonary Medicine, Hospital Clínic-Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
- Centro de Investigación Biomédica en Red (CIBER) de Enfermedades Respiratorias, Madrid, Spain
| | - Marta Cascante
- Department of Biochemistry and Molecular Biology and Institute of Biomedicine (IBUB), Faculty of Biology, University of Barcelona, Barcelona, Spain
- Centro de Investigación Biomédica en Red (CIBER) de Enfermedades Hepáticas y Digestivas, Madrid, Spain
| |
Collapse
|
77
|
Vercesi AE, Castilho RF, Kowaltowski AJ, de Oliveira HCF, de Souza-Pinto NC, Figueira TR, Busanello ENB. Mitochondrial calcium transport and the redox nature of the calcium-induced membrane permeability transition. Free Radic Biol Med 2018; 129:1-24. [PMID: 30172747 DOI: 10.1016/j.freeradbiomed.2018.08.034] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Revised: 08/16/2018] [Accepted: 08/28/2018] [Indexed: 12/16/2022]
Abstract
Mitochondria possess a Ca2+ transport system composed of separate Ca2+ influx and efflux pathways. Intramitochondrial Ca2+ concentrations regulate oxidative phosphorylation, required for cell function and survival, and mitochondrial redox balance, that participates in a myriad of signaling and damaging pathways. The interaction between Ca2+ accumulation and redox imbalance regulates opening and closing of a highly regulated inner membrane pore, the membrane permeability transition pore (PTP). In this review, we discuss the regulation of the PTP by mitochondrial oxidants, reactive nitrogen species, and the interactions between these species and other PTP inducers. In addition, we discuss the involvement of mitochondrial redox imbalance and PTP in metabolic conditions such as atherogenesis, diabetes, obesity and in mtDNA stability.
Collapse
Affiliation(s)
- Anibal E Vercesi
- Departamento de Patologia Clínica, Faculdade de Ciências Médicas, Universidade Estadual de Campinas, Campinas, SP, Brazil.
| | - Roger F Castilho
- Departamento de Patologia Clínica, Faculdade de Ciências Médicas, Universidade Estadual de Campinas, Campinas, SP, Brazil
| | - Alicia J Kowaltowski
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Helena C F de Oliveira
- Departamento de Biologia Estrutural e Funcional, Instituto de Biologia, Universidade Estadual de Campinas, SP, Brazil
| | - Nadja C de Souza-Pinto
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Tiago R Figueira
- Escola de Educação Física e Esporte de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Estela N B Busanello
- Departamento de Patologia Clínica, Faculdade de Ciências Médicas, Universidade Estadual de Campinas, Campinas, SP, Brazil
| |
Collapse
|
78
|
Hinchy EC, Gruszczyk AV, Willows R, Navaratnam N, Hall AR, Bates G, Bright TP, Krieg T, Carling D, Murphy MP. Mitochondria-derived ROS activate AMP-activated protein kinase (AMPK) indirectly. J Biol Chem 2018; 293:17208-17217. [PMID: 30232152 PMCID: PMC6222118 DOI: 10.1074/jbc.ra118.002579] [Citation(s) in RCA: 195] [Impact Index Per Article: 32.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 09/10/2018] [Indexed: 01/07/2023] Open
Abstract
Mitochondrial reactive oxygen species (ROS) production is a tightly regulated redox signal that transmits information from the organelle to the cell. Other mitochondrial signals, such as ATP, are sensed by enzymes, including the key metabolic sensor and regulator, AMP-activated protein kinase (AMPK). AMPK responds to the cellular ATP/AMP and ATP/ADP ratios by matching mitochondrial ATP production to demand. Previous reports proposed that AMPK activity also responds to ROS, by ROS acting on redox-sensitive cysteine residues (Cys-299/Cys-304) on the AMPK α subunit. This suggests an appealing model in which mitochondria fine-tune AMPK activity by both adenine nucleotide–dependent mechanisms and by redox signals. Here we assessed whether physiological levels of ROS directly alter AMPK activity. To this end we added exogenous hydrogen peroxide (H2O2) to cells and utilized the mitochondria-targeted redox cycler MitoParaquat to generate ROS within mitochondria without disrupting oxidative phosphorylation. Mitochondrial and cytosolic thiol oxidation was assessed by measuring peroxiredoxin dimerization and by redox-sensitive fluorescent proteins. Replacing the putative redox-active cysteine residues on AMPK α1 with alanines did not alter the response of AMPK to H2O2. In parallel with measurements of AMPK activity, we measured the cell ATP/ADP ratio. This allowed us to separate the effects on AMPK activity due to ROS production from those caused by changes in this ratio. We conclude that AMPK activity in response to redox changes is not due to direct action on AMPK itself, but is a secondary consequence of redox effects on other processes, such as mitochondrial ATP production.
Collapse
Affiliation(s)
- Elizabeth C Hinchy
- From the MRC Mitochondrial Biology Unit, University of Cambridge, Wellcome Trust/MRC Building, Cambridge Biomedical Campus, Hills Road, Cambridge, CB2 0XY
| | - Anja V Gruszczyk
- From the MRC Mitochondrial Biology Unit, University of Cambridge, Wellcome Trust/MRC Building, Cambridge Biomedical Campus, Hills Road, Cambridge, CB2 0XY.,the University Department of Surgery and Cambridge NIHR Biomedical Research Centre Addenbrooke's Hospital, Cambridge CB2 0QQ
| | - Robin Willows
- the MRC London Institute of Medical Sciences, Hammersmith Hospital, Imperial College, London, W12 0NN, and
| | - Naveenan Navaratnam
- the MRC London Institute of Medical Sciences, Hammersmith Hospital, Imperial College, London, W12 0NN, and
| | - Andrew R Hall
- From the MRC Mitochondrial Biology Unit, University of Cambridge, Wellcome Trust/MRC Building, Cambridge Biomedical Campus, Hills Road, Cambridge, CB2 0XY
| | - Georgina Bates
- From the MRC Mitochondrial Biology Unit, University of Cambridge, Wellcome Trust/MRC Building, Cambridge Biomedical Campus, Hills Road, Cambridge, CB2 0XY
| | - Thomas P Bright
- From the MRC Mitochondrial Biology Unit, University of Cambridge, Wellcome Trust/MRC Building, Cambridge Biomedical Campus, Hills Road, Cambridge, CB2 0XY
| | - Thomas Krieg
- the Department of Medicine, University of Cambridge, Addenbrooke's Hospital, Hills Road, Cambridge CB2 0QQ, United Kingdom
| | - David Carling
- the MRC London Institute of Medical Sciences, Hammersmith Hospital, Imperial College, London, W12 0NN, and
| | - Michael P Murphy
- From the MRC Mitochondrial Biology Unit, University of Cambridge, Wellcome Trust/MRC Building, Cambridge Biomedical Campus, Hills Road, Cambridge, CB2 0XY,
| |
Collapse
|
79
|
Rundle KI, Sharaf MS, Stevens D, Kamunde C, van den Heuvel MR. Oil Sands Derived Naphthenic Acids Are Oxidative Uncouplers and Impair Electron Transport in Isolated Mitochondria. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:10803-10811. [PMID: 30102860 DOI: 10.1021/acs.est.8b02638] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Naphthenic acids (NAs) are predominant compounds in oil sands influenced waters. These acids cause numerous acute and chronic effects in fishes. However, the mechanism of toxicity underlying these effects has not been fully elucidated. Due to their carboxylic acid moiety and the reported disruption of cellular bioenergetics by similar structures, we hypothesized that NAs would uncouple mitochondrial respiration with the resultant production of reactive oxygen species (ROS). Naphthenic acids were extracted and purified from 17-year-old oil sands tailings waters yielding an extract of 99% carboxylic acids with 90% fitting the classical O2-NA definition. Mitochondria were isolated from rainbow trout liver and exposed to different concentrations of NAs. Mitochondrial respiration, membrane potential, and ROS emission were measured using the Oroboros fluorespirometry system. Additionally, mitochondrial ROS emission and membrane potential were evaluated with real-time flow cytometry. Results showed NAs uncoupled oxidative phosphorylation, inhibited respiration, and increased ROS emission. The effective concentration (EC50) and inhibition concentration (IC50) values for the end points measured ranged from 21.0 to 157.8 mg/L, concentrations similar to tailings waters. For the same end points, EC10/IC10 values ranged from 11.8 to 66.7 mg/L, approaching concentrations found in the environment. These data unveil mechanisms underlying effects of NAs that may contribute to adverse effects on organisms in the environment.
Collapse
Affiliation(s)
- Kate I Rundle
- Canadian Rivers Institute, Department of Biomedical Science, Atlantic Veterinary College , University of Prince Edward Island , Charlottetown , Canada C1A 4P3
| | - Mahmoud S Sharaf
- Department of Biomedical Science, Atlantic Veterinary College , University of Prince Edward Island , Charlottetown , Canada C1A 4P3
| | - Don Stevens
- Department of Biomedical Science, Atlantic Veterinary College , University of Prince Edward Island , Charlottetown , Canada C1A 4P3
| | - Collins Kamunde
- Department of Biomedical Science, Atlantic Veterinary College , University of Prince Edward Island , Charlottetown , Canada C1A 4P3
| | - Michael R van den Heuvel
- Canadian Rivers Institute, Department of Biomedical Science, Atlantic Veterinary College , University of Prince Edward Island , Charlottetown , Canada C1A 4P3
- Canadian Rivers Institute, Department of Biology , University of Prince Edward Island , Charlottetown , Canada C1A 4P3
| |
Collapse
|
80
|
Anderson SH, Glassner MJ, Melnikov A, Friedman G, Orynbayeva Z. Respirometric reserve capacity of cumulus cell mitochondria correlates with oocyte maturity. J Assist Reprod Genet 2018; 35:1821-1830. [PMID: 30094760 DOI: 10.1007/s10815-018-1271-9] [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: 03/27/2018] [Accepted: 07/17/2018] [Indexed: 10/28/2022] Open
Abstract
PURPOSE Oocyte competence is critical in success of assisted reproduction. Metabolic signaling between oocyte and cumulus cells within the cumulus-oocyte complex procure oocyte development. This study evaluated the relationship between respirometric activity of cumulus cells and maturity of corresponding oocytes. METHODS In prospective cohort study, 20 women of age 28-42 undergoing IVF procedure were involved. To evaluate oocyte maturity, the cumulus cells from individual oocytes were assessed flow cytometrically by double labeling of cells with mitochondria specific dyes. The respirometric stress analysis using ATPase inhibitor oligomycin was applied to assess mitochondria metabolic abnormalities. RESULTS The cumulus cells from each of 327 oocytes were analyzed. The respirometric index of cumulus cells (O'R) strongly correlates with maternal ovarian reserve, showing to be higher in patients with higher AMH (p < 0.0017). Cumulus cells from immature oocytes had severe mitochondria deficiency, i.e., low O'R, than those from mature oocytes (p < 0.02). No significant difference in respirometric capacity was found between cumulus cells associated with good vs poor-quality embryos. CONCLUSIONS The oocyte maturity is potentially related to the mitochondria activity of cumulus cells.
Collapse
Affiliation(s)
- Sharon H Anderson
- Main Line Fertility Center, 825 Old Lancaster Road, Suite 170, Bryn Mawr, PA, 19101, USA. .,Department of Obstetrics and Gynecology, Drexel University College of Medicine, Philadelphia, PA, USA.
| | - Michael J Glassner
- Main Line Fertility Center, 825 Old Lancaster Road, Suite 170, Bryn Mawr, PA, 19101, USA.,Department of Obstetrics and Gynecology, Drexel University College of Medicine, Philadelphia, PA, USA
| | | | - Gary Friedman
- Department of Electrical and Computer Engineering, Drexel University, Philadelphia, PA, USA
| | - Zulfiya Orynbayeva
- Department of Surgery, Drexel University College of Medicine, 245 N 15th Street, Philadelphia, PA, 19102, USA.
| |
Collapse
|
81
|
Santra M, Sarkar S, Jun YW, Reo YJ, Ahn KH. Dual probing of redox species, NAD(P)H and HOCl, with a benzo[ a ]phenoxazine based far red-emitting dye. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.07.031] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
|
82
|
Gan X, Zhang L, Liu B, Zhu Z, He Y, Chen J, Zhu J, Yu H. CypD-mPTP axis regulates mitochondrial functions contributing to osteogenic dysfunction of MC3T3-E1 cells in inflammation. J Physiol Biochem 2018; 74:395-402. [PMID: 29679227 DOI: 10.1007/s13105-018-0627-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2017] [Accepted: 03/26/2018] [Indexed: 02/05/2023]
Abstract
Bone is a dynamic organ, the bone-forming osteoblasts and bone-resorbing osteoclasts form the physiological basis of bone remodeling process. During pathological process of numerous inflammatory diseases, these two aspects are uncoupled and the balance is usually tipped in favor of bone destruction. Evidence suggests that the inflammatory destruction of bone is mainly attributed to oxidative stress and is closely related to mitochondrial dysfunction. The mechanisms underlying osteogenic dysfunction in inflammation still need further investigation. Reactive oxygen species (ROS) is associated with mitochondrial dysfunction and cellular damage. Here, we reported an unexplored role of cyclophilin D (CypD), the major modulator of mitochondrial permeability transition pore (mPTP), and the CypD-mPTP axis in inflammation-induced mitochondrial dysfunction and bone damage. And the protective effects of knocking down CypD by siRNA interference or the addition of cyclosporin A (CsA), an inhibitor of CypD, were evidenced by rescued mitochondrial function and osteogenic function of osteoblast under tumor necrosis factor-α (TNF-α) treatment. These findings provide new insights into the role of CypD-mPTP-dependent mitochondrial pathway in the inflammatory bone injury. The protective effect of CsA or other moleculars affecting the mPTP formation may hold promise as a potential novel therapeutic strategy for inflammation-induced bone damage via mitochondrial pathways.
Collapse
Affiliation(s)
- Xueqi Gan
- State Key Laboratory of Oral Disease, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Haiyang Yu 14 S Renmin Rd. 3rd Sec., Chengdu, 610041, Sichuan, People's Republic of China
| | - Ling Zhang
- State Key Laboratory of Oral Disease, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Haiyang Yu 14 S Renmin Rd. 3rd Sec., Chengdu, 610041, Sichuan, People's Republic of China
| | - Beilei Liu
- State Key Laboratory of Oral Disease, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Haiyang Yu 14 S Renmin Rd. 3rd Sec., Chengdu, 610041, Sichuan, People's Republic of China
| | - Zhuoli Zhu
- State Key Laboratory of Oral Disease, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Haiyang Yu 14 S Renmin Rd. 3rd Sec., Chengdu, 610041, Sichuan, People's Republic of China
| | - Yuting He
- State Key Laboratory of Oral Disease, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Haiyang Yu 14 S Renmin Rd. 3rd Sec., Chengdu, 610041, Sichuan, People's Republic of China
| | - Junsheng Chen
- State Key Laboratory of Oral Disease, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Haiyang Yu 14 S Renmin Rd. 3rd Sec., Chengdu, 610041, Sichuan, People's Republic of China
| | - Junfei Zhu
- State Key Laboratory of Oral Disease, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Haiyang Yu 14 S Renmin Rd. 3rd Sec., Chengdu, 610041, Sichuan, People's Republic of China
| | - Haiyang Yu
- State Key Laboratory of Oral Disease, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Haiyang Yu 14 S Renmin Rd. 3rd Sec., Chengdu, 610041, Sichuan, People's Republic of China.
| |
Collapse
|
83
|
Mullineaux PM, Exposito-Rodriguez M, Laissue PP, Smirnoff N. ROS-dependent signalling pathways in plants and algae exposed to high light: Comparisons with other eukaryotes. Free Radic Biol Med 2018; 122:52-64. [PMID: 29410363 DOI: 10.1016/j.freeradbiomed.2018.01.033] [Citation(s) in RCA: 94] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Revised: 01/27/2018] [Accepted: 01/31/2018] [Indexed: 01/09/2023]
Abstract
Like all aerobic organisms, plants and algae co-opt reactive oxygen species (ROS) as signalling molecules to drive cellular responses to changes in their environment. In this respect, there is considerable commonality between all eukaryotes imposed by the constraints of ROS chemistry, similar metabolism in many subcellular compartments, the requirement for a high degree of signal specificity and the deployment of thiol peroxidases as transducers of oxidising equivalents to regulatory proteins. Nevertheless, plants and algae carry out specialised signalling arising from oxygenic photosynthesis in chloroplasts and photoautotropism, which often induce an imbalance between absorption of light energy and the capacity to use it productively. A key means of responding to this imbalance is through communication of chloroplasts with the nucleus to adjust cellular metabolism. Two ROS, singlet oxygen (1O2) and hydrogen peroxide (H2O2), initiate distinct signalling pathways when photosynthesis is perturbed. 1O2, because of its potent reactivity means that it initiates but does not transduce signalling. In contrast, the lower reactivity of H2O2 means that it can also be a mobile messenger in a spatially-defined signalling pathway. How plants translate a H2O2 message to bring about changes in gene expression is unknown and therefore, we draw on information from other eukaryotes to propose a working hypothesis. The role of these ROS generated in other subcellular compartments of plant cells in response to HL is critically considered alongside other eukaryotes. Finally, the responses of animal cells to oxidative stress upon high irradiance exposure is considered for new comparisons between plant and animal cells.
Collapse
Affiliation(s)
- Philip M Mullineaux
- School of Biological Sciences, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, UK.
| | | | | | - Nicholas Smirnoff
- Biosciences, College of Life and Environmental Sciences, University of Exeter, Geoffrey Pope Building, Stocker Road, Exeter EX4 4QD, UK
| |
Collapse
|
84
|
Robb EL, Hall AR, Prime TA, Eaton S, Szibor M, Viscomi C, James AM, Murphy MP. Control of mitochondrial superoxide production by reverse electron transport at complex I. J Biol Chem 2018; 293:9869-9879. [PMID: 29743240 PMCID: PMC6016480 DOI: 10.1074/jbc.ra118.003647] [Citation(s) in RCA: 194] [Impact Index Per Article: 32.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 05/08/2018] [Indexed: 12/17/2022] Open
Abstract
The generation of mitochondrial superoxide (O2̇̄) by reverse electron transport (RET) at complex I causes oxidative damage in pathologies such as ischemia reperfusion injury, but also provides the precursor to H2O2 production in physiological mitochondrial redox signaling. Here, we quantified the factors that determine mitochondrial O2̇̄ production by RET in isolated heart mitochondria. Measuring mitochondrial H2O2 production at a range of proton-motive force (Δp) values and for several coenzyme Q (CoQ) and NADH pool redox states obtained with the uncoupler p-trifluoromethoxyphenylhydrazone, we show that O2̇̄ production by RET responds to changes in O2 concentration, the magnitude of Δp, and the redox states of the CoQ and NADH pools. Moreover, we determined how expressing the alternative oxidase from the tunicate Ciona intestinalis to oxidize the CoQ pool affected RET-mediated O2̇̄ production at complex I, underscoring the importance of the CoQ pool for mitochondrial O2̇̄ production by RET. An analysis of O2̇̄ production at complex I as a function of the thermodynamic forces driving RET at complex I revealed that many molecules that affect mitochondrial reactive oxygen species production do so by altering the overall thermodynamic driving forces of RET, rather than by directly acting on complex I. These findings clarify the factors controlling RET-mediated mitochondrial O2̇̄ production in both pathological and physiological conditions. We conclude that O2̇̄ production by RET is highly responsive to small changes in Δp and the CoQ redox state, indicating that complex I RET represents a major mode of mitochondrial redox signaling.
Collapse
Affiliation(s)
- Ellen L Robb
- From the Medical Research Council Mitochondrial Biology Unit, Hills Road, University of Cambridge, Cambridge CB2 0XY, United Kingdom
| | - Andrew R Hall
- From the Medical Research Council Mitochondrial Biology Unit, Hills Road, University of Cambridge, Cambridge CB2 0XY, United Kingdom
| | - Tracy A Prime
- From the Medical Research Council Mitochondrial Biology Unit, Hills Road, University of Cambridge, Cambridge CB2 0XY, United Kingdom
| | - Simon Eaton
- the UCL Great Ormond Street Institute of Child Health, London WC1N 1EH, United Kingdom
| | - Marten Szibor
- the Faculty of Medicine and Life Sciences, University of Tampere, Tampere FI-33014, Finland, and
- the Max-Planck-Institute for Heart and Lung Research, Ludwigstrasse 43, 61231 Bad Nauheim, Germany
| | - Carlo Viscomi
- From the Medical Research Council Mitochondrial Biology Unit, Hills Road, University of Cambridge, Cambridge CB2 0XY, United Kingdom
| | - Andrew M James
- From the Medical Research Council Mitochondrial Biology Unit, Hills Road, University of Cambridge, Cambridge CB2 0XY, United Kingdom
| | - Michael P Murphy
- From the Medical Research Council Mitochondrial Biology Unit, Hills Road, University of Cambridge, Cambridge CB2 0XY, United Kingdom,
| |
Collapse
|
85
|
Sidlauskaite E, Gibson JW, Megson IL, Whitfield PD, Tovmasyan A, Batinic-Haberle I, Murphy MP, Moult PR, Cobley JN. Mitochondrial ROS cause motor deficits induced by synaptic inactivity: Implications for synapse pruning. Redox Biol 2018; 16:344-351. [PMID: 29587245 PMCID: PMC5953219 DOI: 10.1016/j.redox.2018.03.012] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 03/15/2018] [Accepted: 03/17/2018] [Indexed: 01/05/2023] Open
Abstract
Developmental synapse pruning refines burgeoning connectomes. The basic mechanisms of mitochondrial reactive oxygen species (ROS) production suggest they select inactive synapses for pruning: whether they do so is unknown. To begin to unravel whether mitochondrial ROS regulate pruning, we made the local consequences of neuromuscular junction (NMJ) pruning detectable as motor deficits by using disparate exogenous and endogenous models to induce synaptic inactivity en masse in developing Xenopus laevis tadpoles. We resolved whether: (1) synaptic inactivity increases mitochondrial ROS; and (2) chemically heterogeneous antioxidants rescue synaptic inactivity induced motor deficits. Regardless of whether it was achieved with muscle (α-bungarotoxin), nerve (α-latrotoxin) targeted neurotoxins or an endogenous pruning cue (SPARC), synaptic inactivity increased mitochondrial ROS in vivo. The manganese porphyrins MnTE-2-PyP5+ and/or MnTnBuOE-2-PyP5+ blocked mitochondrial ROS to significantly reduce neurotoxin and endogenous pruning cue induced motor deficits. Selectively inducing mitochondrial ROS-using mitochondria-targeted Paraquat (MitoPQ)-recapitulated synaptic inactivity induced motor deficits; which were significantly reduced by blocking mitochondrial ROS with MnTnBuOE-2-PyP5+. We unveil mitochondrial ROS as synaptic activity sentinels that regulate the phenotypical consequences of forced synaptic inactivity at the NMJ. Our novel results are relevant to pruning because synaptic inactivity is one of its defining features.
Collapse
Affiliation(s)
- Eva Sidlauskaite
- School of Science Engineering and Technology, Abertay University, Dundee DD1 1HG, UK
| | - Jack W Gibson
- School of Science Engineering and Technology, Abertay University, Dundee DD1 1HG, UK
| | - Ian L Megson
- Institute of Health Science, University of Highlands and Islands, Inverness IV2 3JH, UK
| | - Philip D Whitfield
- Institute of Health Science, University of Highlands and Islands, Inverness IV2 3JH, UK
| | - Artak Tovmasyan
- Department of Radiation Oncology, School of Medicine, Duke University, Durham, NC 27710, USA
| | - Ines Batinic-Haberle
- Department of Radiation Oncology, School of Medicine, Duke University, Durham, NC 27710, USA
| | - Michael P Murphy
- MRC Mitochondrial Biology Unit, University of Cambridge, Cambridge Biomedical Campus, CB2 0XY, UK
| | - Peter R Moult
- School of Science Engineering and Technology, Abertay University, Dundee DD1 1HG, UK
| | - James N Cobley
- Institute of Health Science, University of Highlands and Islands, Inverness IV2 3JH, UK.
| |
Collapse
|
86
|
Yu Z, Zhang J, Hou M. Time-dependent disturbances of chloride salts on overall redox reaction and luminescence in Vibrio fischeri. CHEMOSPHERE 2018; 199:122-129. [PMID: 29433025 DOI: 10.1016/j.chemosphere.2018.02.029] [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: 07/14/2017] [Revised: 02/01/2018] [Accepted: 02/05/2018] [Indexed: 06/08/2023]
Abstract
The redox state of NADH/NADPH balance (nicotinamide adenine dinucleotide/nicotinamide adenine dinucleotide phosphate) is crucial in cellular homeostasis. Recent studies reported that sodium halide ions (NaX, X = F-, Cl-, Br- and I-) stimulated NAD(P)H in Vibrio fischeri (VF). However, it remained unanswered whether this pattern applied in salts with other cations, e.g., K+, Mg2+ and Ca2+, whose aquatic concentrations were increased by anthropogenic activities and climate change. Currently, VF were incubated with chloride salts, including KCl, MgCl2 and CaCl2, and effects were measured in a time-dependent fashion. Both NADH and NADPH showed stimulation that increased over time, and the greatest maximum stimulation at 24 h was CaCl2 > MgCl2 > KCl. The changes of NADH/NADPH ratios over time in CaCl2, MgCl2 and KCl were descendent, ascendant and stable, respectively. Simultaneously, FMN:NAD(P)H reaction catalyst (luciferase, in the form of expression levels of lux A and lux B), adenosine triphosphate and the expression levels of its regulating gene adk were also stimulated. The luminescence showed even more significant stimulations than the overall redox reaction. Together with earlier reported effects of NaCl, the chloride salts commonly disturbed the redox state and influenced the adaption of organisms to challenging environments.
Collapse
Affiliation(s)
- Zhenyang Yu
- College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China; Jiaxing Tongji Institute for Environment, Jiaxing, Zhejiang Province, 3014051 PR China
| | - Jing Zhang
- College of Ecological Technology and Engineering, Shanghai Institute of Technology, Shanghai, 201418, PR China; Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, Guilin, 541004, PR China.
| | - Meifang Hou
- College of Ecological Technology and Engineering, Shanghai Institute of Technology, Shanghai, 201418, PR China
| |
Collapse
|
87
|
Cobley JN, Fiorello ML, Bailey DM. 13 reasons why the brain is susceptible to oxidative stress. Redox Biol 2018; 15:490-503. [PMID: 29413961 PMCID: PMC5881419 DOI: 10.1016/j.redox.2018.01.008] [Citation(s) in RCA: 668] [Impact Index Per Article: 111.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 01/16/2018] [Accepted: 01/17/2018] [Indexed: 12/12/2022] Open
Abstract
The human brain consumes 20% of the total basal oxygen (O2) budget to support ATP intensive neuronal activity. Without sufficient O2 to support ATP demands, neuronal activity fails, such that, even transient ischemia is neurodegenerative. While the essentiality of O2 to brain function is clear, how oxidative stress causes neurodegeneration is ambiguous. Ambiguity exists because many of the reasons why the brain is susceptible to oxidative stress remain obscure. Many are erroneously understood as the deleterious result of adventitious O2 derived free radical and non-radical species generation. To understand how many reasons underpin oxidative stress, one must first re-cast free radical and non-radical species in a positive light because their deliberate generation enables the brain to achieve critical functions (e.g. synaptic plasticity) through redox signalling (i.e. positive functionality). Using free radicals and non-radical derivatives to signal sensitises the brain to oxidative stress when redox signalling goes awry (i.e. negative functionality). To advance mechanistic understanding, we rationalise 13 reasons why the brain is susceptible to oxidative stress. Key reasons include inter alia unsaturated lipid enrichment, mitochondria, calcium, glutamate, modest antioxidant defence, redox active transition metals and neurotransmitter auto-oxidation. We review RNA oxidation as an underappreciated cause of oxidative stress. The complex interplay between each reason dictates neuronal susceptibility to oxidative stress in a dynamic context and neural identity dependent manner. Our discourse sets the stage for investigators to interrogate the biochemical basis of oxidative stress in the brain in health and disease.
Collapse
Affiliation(s)
- James Nathan Cobley
- Free Radical Laboratory, Departments of Diabetes and Cardiovascular Sciences, Centre for Health Sciences, University of the Highlands and Islands, Inverness IV2 3HJ, UK.
| | - Maria Luisa Fiorello
- Free Radical Laboratory, Departments of Diabetes and Cardiovascular Sciences, Centre for Health Sciences, University of the Highlands and Islands, Inverness IV2 3HJ, UK
| | - Damian Miles Bailey
- Neurovascular Research Laboratory, Faculty of Life Sciences and Education, University of South Wales, Wales, CF37 4AT, UK
| |
Collapse
|
88
|
Chittiboyina S, Bai Y, Lelièvre SA. Microenvironment-Cell Nucleus Relationship in the Context of Oxidative Stress. Front Cell Dev Biol 2018; 6:23. [PMID: 29594114 PMCID: PMC5854663 DOI: 10.3389/fcell.2018.00023] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Accepted: 02/21/2018] [Indexed: 12/17/2022] Open
Abstract
The microenvironment is a source of reactive oxygen species (ROS) that influence cell phenotype and tissue homeostasis. The impact of ROS on redox pathways as well as directly on epigenetic mechanisms and the DNA illustrate communication with the cell nucleus. Changes in gene transcription related to redox conditions also influence the content and structure of the extracellular matrix. However, the importance of microenvironmental ROS for normal progression through life and disease development still needs to be thoroughly understood. We illustrate how different ROS concentration levels trigger various intracellular pathways linked to nuclear functions and determine processes necessary for the differentiation of stem cells. The abnormal predominance of ROS that leads to oxidative stress is emphasized in light of its impact on aging and diseases related to aging. These phenomena are discussed in the context of the possible contribution of extracellular ROS via direct diffusion into cells responsible for organ function, but also via an impact on stromal cells that triggers extracellular modifications and influences mechanotransduction. Finally, we argue that organs-on-a-chip with controlled microenvironmental conditions can help thoroughly grasp whether ROS production is readily a cause or a consequence of certain disorders, and better understand the concentration levels of extracellular ROS that are necessary to induce a switch in phenotype.
Collapse
Affiliation(s)
- Shirisha Chittiboyina
- Department of Basic Medical Sciences, Purdue University, West Lafayette, IN, United States
- 3D Cell Culture Core, Birck Nanotechnology Center, Purdue University Discovery Park, West Lafayette, IN, United States
| | - Yunfeng Bai
- Department of Basic Medical Sciences, Purdue University, West Lafayette, IN, United States
| | - Sophie A. Lelièvre
- Department of Basic Medical Sciences, Purdue University, West Lafayette, IN, United States
- 3D Cell Culture Core, Birck Nanotechnology Center, Purdue University Discovery Park, West Lafayette, IN, United States
- Center for Cancer Research, West Lafayette, IN, United States
| |
Collapse
|
89
|
Friend or foe? Mitochondria as a pharmacological target in cancer treatment. Future Med Chem 2017; 9:2197-2210. [PMID: 29182013 DOI: 10.4155/fmc-2017-0110] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Mitochondria have acquired numerous functions over the course of evolution, such as those involved in controlling energy production, cellular metabolism, cell survival, apoptosis and autophagy within host cells. Tumor cells can develop defects in mitochondrial function, presenting a potential strategy for designing selective anticancer therapies. Therefore, cancer has been the main focus of recent research to uncover possible mitochondrial targets for therapeutic benefit. This comprehensive review covers not only the recent discoveries of the roles of mitochondria in cancer development, progression and therapeutic implications but also the findings regarding emerging mitochondrial therapeutic targets and mitochondria-targeted agents. Current challenges and future directions for developments and applications of mitochondrial-targeted therapeutics are also discussed.
Collapse
|
90
|
Mortezaee K, Khanlarkhani N. Melatonin application in targeting oxidative‐induced liver injuries: A review. J Cell Physiol 2017; 233:4015-4032. [DOI: 10.1002/jcp.26209] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Accepted: 10/04/2017] [Indexed: 01/03/2023]
Affiliation(s)
- Keywan Mortezaee
- Department of AnatomySchool of MedicineKurdistan University of Medical SciencesSanandajIran
| | - Neda Khanlarkhani
- Department of Anatomy, School of MedicineTehran University of Medical SciencesTehranIran
| |
Collapse
|
91
|
Nicolas S, Cazareth J, Zarif H, Guyon A, Heurteaux C, Chabry J, Petit-Paitel A. Globular Adiponectin Limits Microglia Pro-Inflammatory Phenotype through an AdipoR1/NF-κB Signaling Pathway. Front Cell Neurosci 2017; 11:352. [PMID: 29184485 PMCID: PMC5694456 DOI: 10.3389/fncel.2017.00352] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Accepted: 10/24/2017] [Indexed: 12/14/2022] Open
Abstract
We recently reported that increased levels of Adiponectin (ApN) in the brain led to microglia phenotype and activation state regulation, thus reducing both global brain inflammation and depressive-like behaviors in mice. Apart from this, little is known on ApN molecular effects on microglia, although these cells are crucial in both physiological and pathological processes. Here we fill this gap by studying the effects and targets of ApN toward neuroinflammation. Our findings suggest that ApN deficiency in mice leads to a higher sensitivity of mice to neuroinflammation that is due to enhanced microglia responsiveness to a pro-inflammatory challenge. Moreover, we show that globular ApN (gApN) exerts direct in vivo anti-inflammatory actions on microglia by reducing IL-1β, IL-6, and TNFα synthesis. In vitro, gApN anti-inflammatory properties are confirmed in brain-sorted microglia, primary cultured and microglia cell line (BV2), but are not observed on astrocytes. Our results also show that gApN blocks LPS-induced nitrosative and oxidative stress in microglia. Finally, we demonstrate for the first time that these anti-inflammatory and anti-oxidant actions of gApN on microglia are mediated through an AdipoR1/NF-κB signaling pathway.
Collapse
Affiliation(s)
- Sarah Nicolas
- Centre Nationnal de la Recherche Scientifique, UMR7275 Institut de Pharmacologie Moléculaire et Cellulaire, Université Côte d'Azur, Valbonne, France
| | - Julie Cazareth
- Centre Nationnal de la Recherche Scientifique, UMR7275 Institut de Pharmacologie Moléculaire et Cellulaire, Université Côte d'Azur, Valbonne, France
| | - Hadi Zarif
- Centre Nationnal de la Recherche Scientifique, UMR7275 Institut de Pharmacologie Moléculaire et Cellulaire, Université Côte d'Azur, Valbonne, France
| | - Alice Guyon
- Centre Nationnal de la Recherche Scientifique, UMR7275 Institut de Pharmacologie Moléculaire et Cellulaire, Université Côte d'Azur, Valbonne, France
| | - Catherine Heurteaux
- Centre Nationnal de la Recherche Scientifique, UMR7275 Institut de Pharmacologie Moléculaire et Cellulaire, Université Côte d'Azur, Valbonne, France
| | - Joëlle Chabry
- Centre Nationnal de la Recherche Scientifique, UMR7275 Institut de Pharmacologie Moléculaire et Cellulaire, Université Côte d'Azur, Valbonne, France
| | - Agnès Petit-Paitel
- Centre Nationnal de la Recherche Scientifique, UMR7275 Institut de Pharmacologie Moléculaire et Cellulaire, Université Côte d'Azur, Valbonne, France
| |
Collapse
|
92
|
Voluntary aerobic exercise increases arterial resilience and mitochondrial health with aging in mice. Aging (Albany NY) 2017; 8:2897-2914. [PMID: 27875805 PMCID: PMC5191877 DOI: 10.18632/aging.101099] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2016] [Accepted: 11/03/2016] [Indexed: 01/13/2023]
Abstract
Mitochondrial dysregulation and associated excessive reactive oxygen species (mtROS) production is a key source of oxidative stress in aging arteries that reduces baseline function and may influence resilience (ability to withstand stress). We hypothesized that voluntary aerobic exercise would increase arterial resilience in old mice. An acute mitochondrial stressor (rotenone) caused greater (further) impairment in peak carotid EDD in old (~27 mo., OC, n=12; -32.5±-10.5%) versus young (~7 mo., YC n=11; -5.4±- 3.7%) control male mice, whereas arteries from young and old exercising (YVR n=10 and OVR n=11, 10-wk voluntary running; -0.8±-2.1% and -8.0±4.9%, respectively) mice were protected. Ex-vivo simulated Western diet (WD, high glucose and palmitate) caused greater impairment in EDD in OC (-28.5±8.6%) versus YC (-16.9±5.2%) and YVR (-15.3±2.3%), whereas OVR (-8.9±3.9%) were more resilient (not different versus YC). Simultaneous ex-vivo treatment with mitochondria-specific antioxidant MitoQ attenuated WD-induced impairments in YC and OC, but not YVR or OVR, suggesting that exercise improved resilience to mtROS-mediated stress. Exercise normalized age-related alterations in aortic mitochondrial protein markers PGC-1α, SIRT-3 and Fis1 and augmented cellular antioxidant and stress response proteins. Our results indicate that arterial aging is accompanied by reduced resilience and mitochondrial health, which are restored by voluntary aerobic exercise.
Collapse
|
93
|
Griess B, Tom E, Domann F, Teoh-Fitzgerald M. Extracellular superoxide dismutase and its role in cancer. Free Radic Biol Med 2017; 112:464-479. [PMID: 28842347 PMCID: PMC5685559 DOI: 10.1016/j.freeradbiomed.2017.08.013] [Citation(s) in RCA: 106] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Revised: 08/16/2017] [Accepted: 08/18/2017] [Indexed: 12/19/2022]
Abstract
Reactive oxygen species (ROS) are increasingly recognized as critical determinants of cellular signaling and a strict balance of ROS levels must be maintained to ensure proper cellular function and survival. Notably, ROS is increased in cancer cells. The superoxide dismutase family plays an essential physiological role in mitigating deleterious effects of ROS. Due to the compartmentalization of ROS signaling, EcSOD, the only superoxide dismutase in the extracellular space, has unique characteristics and functions in cellular signal transduction. In comparison to the other two intracellular SODs, EcSOD is a relatively new comer in terms of its tumor suppressive role in cancer and the mechanisms involved are less well understood. Nevertheless, the degree of differential expression of this extracellular antioxidant in cancer versus normal cells/tissues is more pronounced and prevalent than the other SODs. A significant association of low EcSOD expression with reduced cancer patient survival further suggests that loss of extracellular redox regulation promotes a conducive microenvironment that favors cancer progression. The vast array of mechanisms reported in mediating deregulation of EcSOD expression, function, and cellular distribution also supports that loss of this extracellular antioxidant provides a selective advantage to cancer cells. Moreover, overexpression of EcSOD inhibits tumor growth and metastasis, indicating a role as a tumor suppressor. This review focuses on the current understanding of the mechanisms of deregulation and tumor suppressive function of EcSOD in cancer.
Collapse
Affiliation(s)
- Brandon Griess
- Department of Biochemistry and Molecular Biology, Buffett Cancer Center, College of Medicine, University of Nebraska Medical Center, Omaha, NE 68198, United States
| | - Eric Tom
- Department of Biochemistry and Molecular Biology, Buffett Cancer Center, College of Medicine, University of Nebraska Medical Center, Omaha, NE 68198, United States
| | - Frederick Domann
- Free Radical and Radiation Biology Program, Radiation Oncology, University of Iowa, Iowa, IA 52242, United States
| | - Melissa Teoh-Fitzgerald
- Department of Biochemistry and Molecular Biology, Buffett Cancer Center, College of Medicine, University of Nebraska Medical Center, Omaha, NE 68198, United States.
| |
Collapse
|
94
|
Rovira AR, Fin A, Tor Y. Emissive Synthetic Cofactors: An Isomorphic, Isofunctional, and Responsive NAD + Analogue. J Am Chem Soc 2017; 139:15556-15559. [PMID: 29043790 DOI: 10.1021/jacs.7b05852] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The synthesis, photophysics, and biochemical utility of a fluorescent NAD+ analogue based on an isothiazolo[4,3-d]pyrimidine core (NtzAD+) are described. Enzymatic reactions, photophysically monitored in real time, show NtzAD+ and NtzADH to be substrates for yeast alcohol dehydrogenase and lactate dehydrogenase, respectively, with reaction rates comparable to that of the native cofactors. A drop in fluorescence is seen as NtzAD+ is converted to NtzADH, reflecting a complementary photophysical behavior to that of the native NAD+/NADH. NtzAD+ and NtzADH serve as substrates for NADase, which selectively cleaves the nicotinamide's glycosidic bond yielding tzADP-ribose. NtzAD+ also serves as a substrate for ribosyl transferases, including human adenosine ribosyl transferase 5 (ART5) and Cholera toxin subunit A (CTA), which hydrolyze the nicotinamide and transfer tzADP-ribose to an arginine analogue, respectively. These reactions can be monitored by fluorescence spectroscopy, in stark contrast to the corresponding processes with the nonemissive NAD+.
Collapse
Affiliation(s)
- Alexander R Rovira
- Department of Chemistry and Biochemistry, University of California, San Diego , La Jolla, California 92093-0358, United States
| | - Andrea Fin
- Department of Chemistry and Biochemistry, University of California, San Diego , La Jolla, California 92093-0358, United States
| | - Yitzhak Tor
- Department of Chemistry and Biochemistry, University of California, San Diego , La Jolla, California 92093-0358, United States
| |
Collapse
|
95
|
Aledo JC, Cantón FR, Veredas FJ. A machine learning approach for predicting methionine oxidation sites. BMC Bioinformatics 2017; 18:430. [PMID: 28962549 PMCID: PMC5622526 DOI: 10.1186/s12859-017-1848-9] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Accepted: 09/21/2017] [Indexed: 01/15/2023] Open
Abstract
BACKGROUND The oxidation of protein-bound methionine to form methionine sulfoxide, has traditionally been regarded as an oxidative damage. However, recent evidences support the view of this reversible reaction as a regulatory post-translational modification. The perception that methionine sulfoxidation may provide a mechanism to the redox regulation of a wide range of cellular processes, has stimulated some proteomic studies. However, these experimental approaches are expensive and time-consuming. Therefore, computational methods designed to predict methionine oxidation sites are an attractive alternative. As a first approach to this matter, we have developed models based on random forests, support vector machines and neural networks, aimed at accurate prediction of sites of methionine oxidation. RESULTS Starting from published proteomic data regarding oxidized methionines, we created a hand-curated dataset formed by 113 unique polypeptides of known structure, containing 975 methionyl residues, 122 of which were oxidation-prone (positive dataset) and 853 were oxidation-resistant (negative dataset). We use a machine learning approach to generate predictive models from these datasets. Among the multiple features used in the classification task, some of them contributed substantially to the performance of the predictive models. Thus, (i) the solvent accessible area of the methionine residue, (ii) the number of residues between the analyzed methionine and the next methionine found towards the N-terminus and (iii) the spatial distance between the atom of sulfur from the analyzed methionine and the closest aromatic residue, were among the most relevant features. Compared to the other classifiers we also evaluated, random forests provided the best performance, with accuracy, sensitivity and specificity of 0.7468±0.0567, 0.6817±0.0982 and 0.7557±0.0721, respectively (mean ± standard deviation). CONCLUSIONS We present the first predictive models aimed to computationally detect methionine sites that may become oxidized in vivo in response to oxidative signals. These models provide insights into the structural context in which a methionine residue become either oxidation-resistant or oxidation-prone. Furthermore, these models should be useful in prioritizing methinonyl residues for further studies to determine their potential as regulatory post-translational modification sites.
Collapse
Affiliation(s)
- Juan C. Aledo
- Departamento de Biología Molecular y Bioquímica, Facultad de Ciencias, Universidad de Málaga, Bulevar de Louis Pasteur s/n, Málaga, 29071 Spain
| | - Francisco R. Cantón
- Departamento de Biología Molecular y Bioquímica, Facultad de Ciencias, Universidad de Málaga, Bulevar de Louis Pasteur s/n, Málaga, 29071 Spain
| | - Francisco J. Veredas
- Departamento de Lenguajes y Ciencias de la Computación, Universidad de Málaga, Bulevar de Louis Pasteur s/n, Málaga, 29071 Spain
| |
Collapse
|
96
|
The Combination of Physical Exercise with Muscle-Directed Antioxidants to Counteract Sarcopenia: A Biomedical Rationale for Pleiotropic Treatment with Creatine and Coenzyme Q10. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:7083049. [PMID: 29123615 PMCID: PMC5632475 DOI: 10.1155/2017/7083049] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Revised: 08/13/2017] [Accepted: 08/23/2017] [Indexed: 12/21/2022]
Abstract
Sarcopenia represents an increasing public health risk due to the rapid aging of the world's population. It is characterized by both low muscle mass and function and is associated with mobility disorders, increased risk of falls and fractures, loss of independence, disabilities, and increased risk of death. Despite the urgency of the problem, the development of treatments for sarcopenia has lagged. Increased reactive oxygen species (ROS) production and decreased antioxidant (AO) defences seem to be important factors contributing to muscle impairment. Studies have been conducted to verify whether physical exercise and/or AOs could prevent and/or delay sarcopenia through a normalization of the etiologically relevant ROS imbalance. Despite the strong rationale, the results obtained were contradictory, particularly with regard to the effects of the tested AOs. A possible explanation might be that not all the agents included in the general heading of "AOs" could fulfill the requisites to counteract the complex series of events causing/accelerating sarcopenia: the combination of the muscle-directed antioxidants creatine and coenzyme Q10 with physical exercise as a biomedical rationale for pleiotropic prevention and/or treatment of sarcopenia is discussed.
Collapse
|
97
|
Benzo[a]pyrene-induced metabolic shift from glycolysis to pentose phosphate pathway in the human bladder cancer cell line RT4. Sci Rep 2017; 7:9773. [PMID: 28851999 PMCID: PMC5575001 DOI: 10.1038/s41598-017-09936-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Accepted: 08/01/2017] [Indexed: 12/16/2022] Open
Abstract
Benzo[a]pyrene (B[a]P), a well-known polyaromatic hydrocarbon, is known for its lung carcinogenicity, however, its role in bladder cancer development is still discussed. Comparative two-dimensional blue native SDS-PAGE analysis of protein complexes isolated from subcellular fractions of 0.5 µM B[a]P-exposed cells indicated a differential regulation of proteins involved in carbohydrate, fatty acid, and nucleotide metabolism, suggesting a possible metabolic flux redistribution. It appeared that B[a]P exposure led to a repression of enzymes (fructose-bisphosphate aldolase A, glucose-6-phosphate isomerase, lactate dehydrogenase) involved in glycolysis, and an up-regulation of proteins (glucose-6-phosphate 1-dehydrogenase, 6-phosphogluconolactonase) catalyzing the pentose phosphate pathway and one carbon metabolism (10-formyltetrahydrofolate dehydrogenase, bifunctional purine biosynthesis protein). Untargeted metabolomics further supported the proteomic data, a lower concentration of glycolytic metabolite was observed as compared to glutamine, xylulose and fatty acids. The analysis of the glutathione and NADPH/NADP+ content of the cells revealed a significant increase of these cofactors. Concomitantly, we did not observe any detectable increase in the production of ROS. With the present work, we shed light on an early phase of the metabolic stress response in which the urothelial cells are capable of counteracting oxidative stress by redirecting the metabolic flux from glycolysis to pentose phosphate pathway.
Collapse
|
98
|
Chouchani ET, Kazak L, Spiegelman BM. Mitochondrial reactive oxygen species and adipose tissue thermogenesis: Bridging physiology and mechanisms. J Biol Chem 2017; 292:16810-16816. [PMID: 28842500 DOI: 10.1074/jbc.r117.789628] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Brown and beige adipose tissues can catabolize stored energy to generate heat, relying on the principal effector of thermogenesis: uncoupling protein 1 (UCP1). This unique capability could be leveraged as a therapy for metabolic disease. Numerous animal and cellular models have now demonstrated that mitochondrial reactive oxygen species (ROS) signal to support adipocyte thermogenic identity and function. Herein, we contextualize these findings within the established principles of redox signaling and mechanistic studies of UCP1 function. We provide a framework for understanding the role of mitochondrial ROS signaling in thermogenesis together with testable hypotheses for understanding mechanisms and developing therapies.
Collapse
Affiliation(s)
- Edward T Chouchani
- From the Dana-Farber Cancer Institute, Harvard Medical School and.,Department of Cell Biology, Harvard University Medical School, Boston, Massachusetts 02115
| | - Lawrence Kazak
- From the Dana-Farber Cancer Institute, Harvard Medical School and.,Department of Cell Biology, Harvard University Medical School, Boston, Massachusetts 02115
| | - Bruce M Spiegelman
- From the Dana-Farber Cancer Institute, Harvard Medical School and .,Department of Cell Biology, Harvard University Medical School, Boston, Massachusetts 02115
| |
Collapse
|
99
|
Cobley JN, Close GL, Bailey DM, Davison GW. Exercise redox biochemistry: Conceptual, methodological and technical recommendations. Redox Biol 2017; 12:540-548. [PMID: 28371751 PMCID: PMC5377294 DOI: 10.1016/j.redox.2017.03.022] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Revised: 03/23/2017] [Accepted: 03/24/2017] [Indexed: 12/16/2022] Open
Abstract
Exercise redox biochemistry is of considerable interest owing to its translational value in health and disease. However, unaddressed conceptual, methodological and technical issues complicate attempts to unravel how exercise alters redox homeostasis in health and disease. Conceptual issues relate to misunderstandings that arise when the chemical heterogeneity of redox biology is disregarded: which often complicates attempts to use redox-active compounds and assess redox signalling. Further, that oxidised macromolecule adduct levels reflect formation and repair is seldom considered. Methodological and technical issues relate to the use of out-dated assays and/or inappropriate sample preparation techniques that confound biochemical redox analysis. After considering each of the aforementioned issues, we outline how each issue can be resolved and provide a unifying set of recommendations. We specifically recommend that investigators: consider chemical heterogeneity, use redox-active compounds judiciously, abandon flawed assays, carefully prepare samples and assay buffers, consider repair/metabolism, use multiple biomarkers to assess oxidative damage and redox signalling.
Collapse
Affiliation(s)
- James N Cobley
- Department for Sport and Exercise Sciences, Abertay University, 40 Bell Street, Dundee, Scotland DD1 1HG, UK.
| | - Graeme L Close
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Tom Reilly Building, Liverpool, England L3 3AF, UK
| | - Damian M Bailey
- Neurovascular Research Laboratory, Faculty of Life Sciences and Education, University of South Wales, Wales, CF37 4AT, UK; Faculty of Medicine, Reichwald Health Sciences Centre, University of British Columbia-Okanagan, Kelowna, British Columbia, Canada
| | - Gareth W Davison
- Sport and Exercise Science Research Institute, Ulster University, Belfast, BT37 OQB, UK
| |
Collapse
|
100
|
Patel M, McElroy PB. Mitochondrial Dysfunction in Parkinson’s Disease. OXIDATIVE STRESS AND REDOX SIGNALLING IN PARKINSON’S DISEASE 2017. [DOI: 10.1039/9781782622888-00061] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Parkinson’s disease (PD) is one of the most common neurodegenerative disorders where oxidative stress and mitochondrial dysfunction have been implicated as etiological factors. Mitochondria are the major producers of reactive oxygen species (ROS) that can have damaging effects to cellular macromolecules leading to neurodegeneration. The most compelling evidence for the role of mitochondria in the pathogenesis of PD has been derived from toxicant-induced models of parkinsonism. Over the years, epidemiological studies have suggested a link between exposure to environmental toxins such as pesticides and the risk of developing PD. Data from human and experimental studies involving the use of chemical agents like paraquat, diquat, 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine, rotenone and maneb have provided valuable insight into the underlying mitochondrial mechanisms contributing to PD and associated neurodegeneration. In this review, we have discussed the role of mitochondrial ROS and dysfunction in the pathogenesis of PD with a special focus on environmental agent-induced parkinsonism. We have described the various mitochondrial mechanisms by which such chemicals exert neurotoxicity, highlighting some landmark epidemiological and experimental studies that support the role of mitochondrial ROS and oxidative stress in contributing to these effects. Finally, we have discussed the significance of these studies in understanding the mechanistic underpinnings of PD-related dopaminergic neurodegeneration.
Collapse
Affiliation(s)
- Manisha Patel
- Department of Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus Aurora CO 80045 USA
| | - Pallavi Bhuyan McElroy
- Department of Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus Aurora CO 80045 USA
| |
Collapse
|