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Hao X, Liu M, Zhang X, Yu H, Fang Z, Gao X, Chen M, Shao Q, Gao W, Lei L, Song Y, Li X, Liu G, Du X. Thioredoxin-2 suppresses hydrogen peroxide-activated nuclear factor kappa B signaling via alleviating oxidative stress in bovine adipocytes. J Dairy Sci 2024; 107:4045-4055. [PMID: 38246558 DOI: 10.3168/jds.2023-23465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 12/16/2023] [Indexed: 01/23/2024]
Abstract
During the periparturient period, both oxidative stress, and inflammation of adipose tissue are considered high risk factors for metabolic disorder of dairy cows. Oxidative stress can activate transcription factor nuclear factor kappa B (NF-κB), which lead to the upregulation of genes involved in inflammatory pathways. Thioredoxin-2 (TXN2) is a mitochondrial protein that regulates cellular redox by suppressing mitochondrial reactive oxygen species (ROS) generation in nonruminant, whereas the function of TXN2 in bovine adipocytes was unclear. Thus, the objective of this study was to evaluate how or by which mechanisms TXN2 regulates oxidative stress and NF-κB signaling pathway in bovine adipocytes. Bovine pre-adipocytes isolated from 5 healthy Holstein cows were differentiated and used for (1) treatment with different concentrations of hydrogen peroxide (H2O2; 0, 25, 50, 100, 200, or 400 μM) for 2 h; (2) transfection with or without TXN2 small interfering RNA (si-TXN2) for 48 h and then treated with or without 200 μM H2O2 for 2 h; (3) transfection with scrambled negative control siRNA (si-control) or si-TXN2 for 48 h, and then treatment with or without 10 mM N-acetylcysteine (NAC) for 2 h; (4) transfection with or without TXN2-overexpressing plasmid for 48 h and then treatment with or without 200 μM H2O2 for 2 h. High concentrations of H2O2 (200 and 400 μM) decreased protein and mRNA abundance of TXN2, reduced total antioxidant capacity (T-AOC) and ATP content in adipocytes. Moreover, 200 and 400 μM H2O2 reduced protein abundance of inhibitor of kappa B α (IκBα), increased phosphorylation of NF-κB and upregulated mRNA abundance of tumor necrosis factor-α (TNFA) and interleukin-1B (IL-1B), suggesting that H2O2-induced oxidative stress and activated NF-κB signaling pathway. Silencing of TXN2 increased intracellular ROS content, phosphorylation of NF-κB and mRNA abundance of TNFA and IL-1B, decreased ATP content and protein abundance of IκBα in bovine adipocytes. Knockdown of TXN2 aggravated H2O2-induced oxidative stress and inflammation. In addition, treatment with antioxidant NAC ameliorated oxidative stress and inhibited NF-κB signaling pathway in adipocytes transfected with si-TXN2. In bovine adipocytes treated with H2O2, overexpression of TXN2 reduced the content of ROS and elevated the content of ATP and T-AOC. Overexpression of TXN2 alleviated H2O2-induced inflammatory response in adipocytes, as demonstrated by decreased expression of phosphorylated NF-κB, TNFA, IL-1B, as well as increased expression of IκBα. Furthermore, the protein and mRNA abundance of TXN2 was lower in adipose tissue of dairy cows with clinical ketosis. Overall, our studies contribute to the understanding of the role of TXN2 in adipocyte oxidative stress and inflammatory response.
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Affiliation(s)
- Xue Hao
- State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, Institute of Zoonosis, and College of Veterinary Medicine, Jilin University, Changchun, 130062, China
| | - Mingchao Liu
- College of Veterinary Medicine, Hebei Agricultural University, Baoding, 071001, Hebei, China
| | - Xiao Zhang
- State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, Institute of Zoonosis, and College of Veterinary Medicine, Jilin University, Changchun, 130062, China
| | - Hao Yu
- State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, Institute of Zoonosis, and College of Veterinary Medicine, Jilin University, Changchun, 130062, China
| | - Zhiyuan Fang
- State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, Institute of Zoonosis, and College of Veterinary Medicine, Jilin University, Changchun, 130062, China
| | - Xinxing Gao
- State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, Institute of Zoonosis, and College of Veterinary Medicine, Jilin University, Changchun, 130062, China
| | - Meng Chen
- State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, Institute of Zoonosis, and College of Veterinary Medicine, Jilin University, Changchun, 130062, China
| | - Qi Shao
- State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, Institute of Zoonosis, and College of Veterinary Medicine, Jilin University, Changchun, 130062, China
| | - Wenwen Gao
- State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, Institute of Zoonosis, and College of Veterinary Medicine, Jilin University, Changchun, 130062, China
| | - Lin Lei
- State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, Institute of Zoonosis, and College of Veterinary Medicine, Jilin University, Changchun, 130062, China
| | - Yuxiang Song
- State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, Institute of Zoonosis, and College of Veterinary Medicine, Jilin University, Changchun, 130062, China
| | - Xinwei Li
- State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, Institute of Zoonosis, and College of Veterinary Medicine, Jilin University, Changchun, 130062, China
| | - Guowen Liu
- State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, Institute of Zoonosis, and College of Veterinary Medicine, Jilin University, Changchun, 130062, China
| | - Xiliang Du
- State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, Institute of Zoonosis, and College of Veterinary Medicine, Jilin University, Changchun, 130062, China.
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2
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Yu W, Peng X, Cai X, Xu H, Wang C, Liu F, Luo D, Tang S, Wang Y, Du X, Gao Y, Tian T, Liang S, Chen C, Kim NH, Yuan B, Zhang J, Jiang H. Transcriptome analysis of porcine oocytes during postovulatory aging. Theriogenology 2024:S0093-691X(24)00209-7. [PMID: 38821784 DOI: 10.1016/j.theriogenology.2024.05.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 05/23/2024] [Accepted: 05/23/2024] [Indexed: 06/02/2024]
Abstract
Decreased oocyte quality is a significant contributor to the decline in female fertility that accompanies aging in mammals. Oocytes rely on mRNA stores to support their survival and integrity during the protracted period of transcriptional dormancy as they await ovulation. However, the changes in mRNA levels and interactions that occur during porcine oocyte maturation and aging remain unclear. In this study, the mRNA expression profiles of porcine oocytes during the GV, MII, and aging (24 h after the MII stage) stages were explored by transcriptome sequencing to identify the key genes and pathways that affect oocyte maturation and postovulatory aging. The results showed that 10,929 genes were coexpressed in porcine oocytes during the GV stage, MII stage, and aging stage. In addition, 3037 genes were expressed only in the GV stage, 535 genes were expressed only in the MII stage, and 120 genes were expressed only in the aging stage. The correlation index between the GV and MII stages (0.535) was markedly lower than that between the MII and aging stages (0.942). A total of 3237 genes, which included 1408 upregulated and 1829 downregulated genes, were differentially expressed during porcine oocyte postovulatory aging (aging stage vs. MII stage). Key functional genes, including ATP2A1, ATP2A3, ATP2B2, NDUFS1, NDUFA2, NDUFAF3, SREBF1, CYP11A1, CYP3A29, GPx4, CCP110, STMN1, SPC25, Sirt2, SYCP3, Fascin1/2, PFN1, Cofilin, Tmod3, FLNA, LRKK2, CHEK1/2, DDB1/2, DDIT4L, and TONSL, and key molecular pathways, such as the calcium signaling pathway, MAPK signaling pathway, TGF-β signaling pathway, PI3K/Akt signaling pathway, FoxO signaling pathway, gap junctions, and thermogenesis, were found in abundance during porcine postovulatory aging. These genes are mainly involved in the regulation of many biological processes, such as oxidative stress, calcium homeostasis, mitochondrial function, and lipid peroxidation, during porcine oocyte postovulatory aging. These results contribute to a more in-depth understanding of the biological changes, key regulatory genes and related biological pathways that are involved in oocyte aging and provide a theoretical basis for improving the efficiency of porcine embryo production in vitro and in vivo.
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Affiliation(s)
- Wenjie Yu
- College of Animal Sciences, Jilin University, Changchun, 130062, Jilin, China
| | - Xinyue Peng
- College of Animal Sciences, Jilin University, Changchun, 130062, Jilin, China
| | - Xiaoshi Cai
- College of Animal Sciences, Jilin University, Changchun, 130062, Jilin, China
| | - Hong Xu
- College of Animal Sciences, Jilin University, Changchun, 130062, Jilin, China
| | - Chen Wang
- College of Animal Sciences, Jilin University, Changchun, 130062, Jilin, China
| | - Fengjiao Liu
- College of Animal Sciences, Jilin University, Changchun, 130062, Jilin, China
| | - Dan Luo
- College of Animal Sciences, Jilin University, Changchun, 130062, Jilin, China
| | - Shuhan Tang
- College of Animal Sciences, Jilin University, Changchun, 130062, Jilin, China
| | - Yue Wang
- College of Animal Sciences, Jilin University, Changchun, 130062, Jilin, China
| | - Xiaoxue Du
- College of Animal Sciences, Jilin University, Changchun, 130062, Jilin, China
| | - Yan Gao
- College of Animal Sciences, Jilin University, Changchun, 130062, Jilin, China
| | - Tian Tian
- College of Animal Sciences, Jilin University, Changchun, 130062, Jilin, China; Center of Reproductive Medicine & Center of Prenatal Diagnosis, First Hospital, Jilin University, Changchun, 130062, Jilin, China
| | - Shuang Liang
- College of Animal Sciences, Jilin University, Changchun, 130062, Jilin, China
| | - Chengzhen Chen
- College of Animal Sciences, Jilin University, Changchun, 130062, Jilin, China
| | - Nam-Hyung Kim
- College of Animal Sciences, Jilin University, Changchun, 130062, Jilin, China
| | - Bao Yuan
- College of Animal Sciences, Jilin University, Changchun, 130062, Jilin, China
| | - Jiabao Zhang
- College of Animal Sciences, Jilin University, Changchun, 130062, Jilin, China
| | - Hao Jiang
- College of Animal Sciences, Jilin University, Changchun, 130062, Jilin, China.
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3
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Algothmi KM, Mahasneh ZMH, Abdelnour SA, Khalaf QAW, Noreldin AE, Barkat RA, Khalifa NE, Khafaga AF, Tellez-Isaias G, Alqhtani AH, Swelum AA, Abd El-Hack ME. Protective impacts of mitochondria enhancers against thermal stress in poultry. Poult Sci 2024; 103:103218. [PMID: 37980733 PMCID: PMC10692709 DOI: 10.1016/j.psj.2023.103218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 10/12/2023] [Accepted: 10/17/2023] [Indexed: 11/21/2023] Open
Abstract
Heat stress (HS) is still the essential environmental agent influencing the poultry industry. Research on HS in poultry has progressively acquired growing interest because of increased attention to climate alteration. Poultry can survive at certain zone of environmental temperatures, so it could be considered homoeothermic. In poultry, the normal body temperature is essential to enhance the internal environment for growth, which is achieved by normal environmental temperature. Recently, many studies have revealed that HS could cause mitochondrial dysfunction in broilers by inducing redox dysfunction, increasing uncoupling protein, boosting lipid and protein oxidation, and oxidative stress. Moreover, HS diminished the energy suppliers supported by mitochondria activity. A novel strategy for combating the negative influences of HS via boosting the mitochondria function through enrichment of the diets with mitochondria enhancers was also described in this review. Finally, the current review highlights the mitochondria dysfunction induced by HS in broilers and attempts to boost mitochondria functionality by enriching mitochondria enhancers to broiler diets.
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Affiliation(s)
- Khloud M Algothmi
- Department of Biological Sciences, Faculty of Sciences, King Abdulaziz University, Jeddah, Kingdom of Saudi Arabia
| | - Zeinab M H Mahasneh
- Department of Animal Production, School of Agriculture, the University of Jordan, Amman 11942, Jordan
| | - Sameh A Abdelnour
- Department of Animal Production, Faculty of Agriculture, Zagazig University, Zagazig 44519, Egypt
| | - Qahtan A W Khalaf
- Department of Medical Laboratory Techniques, College of Medical Technology, Al-Kitab University, Kirkuk 36001, Iraq
| | - Ahmed E Noreldin
- Department of Histology and Cytology, Faculty of Veterinary Medicine, Damanhour University, Damanhour 22511, Egypt
| | - Rasha A Barkat
- Department of Physiology, Faculty of Veterinary Medicine, Damanhour University, Damanhour 22511, Egypt
| | - Norhan E Khalifa
- Department of Physiology, Faculty of Veterinary Medicine, Matrouh University, Matrouh 51744, Egypt
| | - Asmaa F Khafaga
- Department of Pathology, Faculty of Veterinary Medicine, Alexandria University, Alexandria 22758, Egypt
| | | | - Abdulmohsen H Alqhtani
- Department of Animal Production, College of Food and Agriculture Sciences, King Saud University, Riyadh, Kingdom of Saudi Arabia
| | - Ayman A Swelum
- Department of Animal Production, College of Food and Agriculture Sciences, King Saud University, Riyadh, Kingdom of Saudi Arabia
| | - Mohamed E Abd El-Hack
- Poultry Department, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt.
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4
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Haak JL, Kregel KC, Bloomer SA. Altered accumulation of hepatic mitochondrial antioxidant proteins with age and environmental heat stress. J Appl Physiol (1985) 2023; 135:1339-1347. [PMID: 37881850 PMCID: PMC10979832 DOI: 10.1152/japplphysiol.00610.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 10/20/2023] [Accepted: 10/20/2023] [Indexed: 10/27/2023] Open
Abstract
Aging impairs overall physiological function, particularly the response to environmental stressors. Repeated heat stress elevates reactive oxygen species and macromolecular damage in the livers of aged animals, likely due to mitochondrial dysfunction. The goal of this investigation was to determine potential mechanisms for mitochondrial dysfunction after heat stress by evaluating key redox-sensitive and antioxidant proteins (Sirt-3, MnSOD, Trx-2, and Ref-1). We hypothesized that heat stress would result in greater mitochondrial abundance of these proteins, but that aging would attenuate this response. For this purpose, young (6 mo) and old (24 mo) Fisher 344 rats were exposed to heat stress on two consecutive days. During each heating trial, colonic temperature was elevated to 41°C during the first 60 min, and then clamped at this temperature for 30 min. Nonheated animals served as controls. At 2 and 24 h after the second heat stress, hepatic mitochondria were isolated from each animal, and then immunoblotted for Sirt-3, acetylated lysine residues (Ac-K), MnSOD, Trx-2, and Ref-1. Aging increased Sirt-3 and lowered Ac-K. In response to heat stress, Sirt-3, Ac-K, MnSOD, and Ref-1 increased in mitochondrial fractions in both young and old animals. At 2 h after the second heat stress, mitochondrial Trx-2 declined in old, but not in young animals. Our results suggest that some components of the response to heat stress are preserved with aging. However, the decline in Trx-2 represents a potential mechanism for age-related mitochondrial damage and dysfunction after heat stress.NEW & NOTEWORTHY Our results suggest heat stress-induced mitochondrial translocation of Sirt-3, MnSOD, and Ref-1 in young and old animals. Aged rats experienced a decline in Trx-2 after heat stress, suggesting a potential mechanism for age-related mitochondrial dysfunction.
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Affiliation(s)
- Jodie L Haak
- Health Sciences Department, Drexel University, Philadelphia, Pennsylvania, United States
| | - Kevin C Kregel
- Department of Health and Human Physiology, The University of Iowa, Iowa City, Iowa, United States
| | - Steven A Bloomer
- Division of Science and Engineering, Penn State Abington, Abington, Pennsylvania, United States
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5
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Kratzke M, Scaria G, Porter S, Kren B, Klein MA. Inhibition of Mitochondrial Antioxidant Defense and CDK4/6 in Mesothelioma. Molecules 2023; 28:molecules28114380. [PMID: 37298855 DOI: 10.3390/molecules28114380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 05/11/2023] [Accepted: 05/16/2023] [Indexed: 06/12/2023] Open
Abstract
Advanced mesothelioma is considered an incurable disease and new treatment strategies are needed. Previous studies have demonstrated that mitochondrial antioxidant defense proteins and the cell cycle may contribute to mesothelioma growth, and that the inhibition of these pathways may be effective against this cancer. We demonstrated that the antioxidant defense inhibitor auranofin and the cyclin-dependent kinase 4/6 inhibitor palbociclib could decrease mesothelioma cell proliferation alone or in combination. In addition, we determined the effects of these compounds on colony growth, cell cycle progression, and the expression of key antioxidant defense and cell cycle proteins. Auranofin and palbociclib were effective in decreasing cell growth and inhibiting the above-described activity across all assays. Further study of this drug combination will elucidate the contribution of these pathways to mesothelioma activity and may reveal a new treatment strategy.
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Affiliation(s)
- Marian Kratzke
- Research Service, Minneapolis VA Health Care System, Minneapolis, MN 55417, USA
| | - George Scaria
- Research Service, Minneapolis VA Health Care System, Minneapolis, MN 55417, USA
- Hematology/Oncology Section, Primary Care Service Line, Minneapolis VA Health Care System, Minneapolis, MN 55417, USA
- Division of Hematology, Oncology and Transplantation, Department of Medicine, University of Minnesota, Minneapolis, MN 55417, USA
| | - Stephen Porter
- Research Service, Minneapolis VA Health Care System, Minneapolis, MN 55417, USA
| | - Betsy Kren
- Research Service, Minneapolis VA Health Care System, Minneapolis, MN 55417, USA
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN 55417, USA
| | - Mark A Klein
- Hematology/Oncology Section, Primary Care Service Line, Minneapolis VA Health Care System, Minneapolis, MN 55417, USA
- Division of Hematology, Oncology and Transplantation, Department of Medicine, University of Minnesota, Minneapolis, MN 55417, USA
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6
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AlOkda A, Van Raamsdonk JM. Evolutionarily Conserved Role of Thioredoxin Systems in Determining Longevity. Antioxidants (Basel) 2023; 12:antiox12040944. [PMID: 37107319 PMCID: PMC10135697 DOI: 10.3390/antiox12040944] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 04/12/2023] [Accepted: 04/13/2023] [Indexed: 04/29/2023] Open
Abstract
Thioredoxin and thioredoxin reductase are evolutionarily conserved antioxidant enzymes that protect organisms from oxidative stress. These proteins also play roles in redox signaling and can act as a redox-independent cellular chaperone. In most organisms, there is a cytoplasmic and mitochondrial thioredoxin system. A number of studies have examined the role of thioredoxin and thioredoxin reductase in determining longevity. Disruption of either thioredoxin or thioredoxin reductase is sufficient to shorten lifespan in model organisms including yeast, worms, flies and mice, thereby indicating conservation across species. Similarly, increasing the expression of thioredoxin or thioredoxin reductase can extend longevity in multiple model organisms. In humans, there is an association between a specific genetic variant of thioredoxin reductase and lifespan. Overall, the cytoplasmic and mitochondrial thioredoxin systems are both important for longevity.
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Affiliation(s)
- Abdelrahman AlOkda
- Department of Neurology and Neurosurgery, McGill University, Montreal, QC H3A 2B4, Canada
- Metabolic Disorders and Complications Program, Research Institute of the McGill University Health Centre, Montreal, QC H4A 3J1, Canada
| | - Jeremy M Van Raamsdonk
- Department of Neurology and Neurosurgery, McGill University, Montreal, QC H3A 2B4, Canada
- Metabolic Disorders and Complications Program, Research Institute of the McGill University Health Centre, Montreal, QC H4A 3J1, Canada
- Brain Repair and Integrative Neuroscience Program, Research Institute of the McGill University Health Centre, Montreal, QC H4A 3J1, Canada
- Division of Experimental Medicine, Department of Medicine, McGill University, Montreal, QC H4A 3J1, Canada
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7
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León-Reyes G, Argoty-Pantoja AD, Becerra-Cervera A, López-Montoya P, Rivera-Paredez B, Velázquez-Cruz R. Oxidative-Stress-Related Genes in Osteoporosis: A Systematic Review. Antioxidants (Basel) 2023; 12:antiox12040915. [PMID: 37107290 PMCID: PMC10135393 DOI: 10.3390/antiox12040915] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 04/06/2023] [Accepted: 04/10/2023] [Indexed: 04/29/2023] Open
Abstract
Osteoporosis is characterized by a decline in bone mineral density (BMD) and increased fracture risk. Free radicals and antioxidant systems play a central role in bone remodeling. This study was conducted to illustrate the role of oxidative-stress-related genes in BMD and osteoporosis. A systematic review was performed following the PRISMA guidelines. The search was computed in PubMed, Web of Sciences, Scopus, EBSCO, and BVS from inception to November 1st, 2022. The risk of bias was evaluated using the Joanna Briggs Institute Critical Appraisal Checklist tool. A total of 427 potentially eligible articles exploring this search question were detected. After removing duplicates (n = 112) and excluding irrelevant manuscripts based on screenings of their titles and abstracts (n = 317), 19 articles were selected for full-text review. Finally, 14 original articles were included in this systematic review after we applied the exclusion and inclusion criteria. Data analyzed in this systematic review indicated that oxidative-stress-related genetic polymorphisms are associated with BMD at different skeletal sites in diverse populations, influencing the risk of osteoporosis or osteoporotic fracture. However, it is necessary to look deep into their association with bone metabolism to determine if the findings can be translated into the clinical management of osteoporosis and its progression.
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Affiliation(s)
- Guadalupe León-Reyes
- Genomics of Bone Metabolism Laboratory, National Institute of Genomic Medicine (INMEGEN), Mexico City 14610, Mexico
| | - Anna D Argoty-Pantoja
- Research Center in Policies, Population and Health, School of Medicine, National Autonomous University of Mexico (UNAM), Mexico City 04510, Mexico
| | - Adriana Becerra-Cervera
- Genomics of Bone Metabolism Laboratory, National Institute of Genomic Medicine (INMEGEN), Mexico City 14610, Mexico
- National Council of Science and Technology (CONACYT), Mexico City 03940, Mexico
| | - Priscilla López-Montoya
- Genomics of Bone Metabolism Laboratory, National Institute of Genomic Medicine (INMEGEN), Mexico City 14610, Mexico
| | - Berenice Rivera-Paredez
- Research Center in Policies, Population and Health, School of Medicine, National Autonomous University of Mexico (UNAM), Mexico City 04510, Mexico
| | - Rafael Velázquez-Cruz
- Genomics of Bone Metabolism Laboratory, National Institute of Genomic Medicine (INMEGEN), Mexico City 14610, Mexico
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8
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New insights into the mechanism of freeze-induced damage based on ice crystal morphology and exudate proteomics. Food Res Int 2022; 161:111757. [DOI: 10.1016/j.foodres.2022.111757] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 07/21/2022] [Accepted: 07/27/2022] [Indexed: 11/17/2022]
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9
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Lacerda JT, Gomes PRL, Zanetti G, Mezzalira N, Lima OG, de Assis LVM, Guler A, Castrucci AM, Moraes MN. Lack of TRPV1 Channel Modulates Mouse Gene Expression and Liver Proteome with Glucose Metabolism Changes. Int J Mol Sci 2022; 23:ijms23137014. [PMID: 35806020 PMCID: PMC9266899 DOI: 10.3390/ijms23137014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 06/18/2022] [Accepted: 06/20/2022] [Indexed: 02/04/2023] Open
Abstract
To investigate the role of the transient receptor potential channel vanilloid type 1 (TRPV1) in hepatic glucose metabolism, we analyzed genes related to the clock system and glucose/lipid metabolism and performed glycogen measurements at ZT8 and ZT20 in the liver of C57Bl/6J (WT) and Trpv1 KO mice. To identify molecular clues associated with metabolic changes, we performed proteomics analysis at ZT8. Liver from Trpv1 KO mice exhibited reduced Per1 expression and increased Pparα, Pparγ, Glut2, G6pc1 (G6pase), Pck1 (Pepck), Akt, and Gsk3b expression at ZT8. Liver from Trpv1 KO mice also showed reduced glycogen storage at ZT8 but not at ZT20 and significant proteomics changes consistent with enhanced glycogenolysis, as well as increased gluconeogenesis and inflammatory features. The network propagation approach evidenced that the TRPV1 channel is an intrinsic component of the glucagon signaling pathway, and its loss seems to be associated with increased gluconeogenesis through PKA signaling. In this sense, the differentially identified kinases and phosphatases in WT and Trpv1 KO liver proteomes show that the PP2A phosphatase complex and PKA may be major players in glycogenolysis in Trpv1 KO mice.
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Affiliation(s)
- José Thalles Lacerda
- Laboratory of Comparative Physiology of Pigmentation, Department of Physiology, Institute of Biosciences, University of São Paulo, São Paulo 05508-090, Brazil; (J.T.L.); (G.Z.); (N.M.); (O.G.L.); (L.V.M.d.A.); (A.M.C.)
| | - Patrícia R. L. Gomes
- Laboratory of Neurobiology, Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, São Paulo 05508-000, Brazil;
| | - Giovanna Zanetti
- Laboratory of Comparative Physiology of Pigmentation, Department of Physiology, Institute of Biosciences, University of São Paulo, São Paulo 05508-090, Brazil; (J.T.L.); (G.Z.); (N.M.); (O.G.L.); (L.V.M.d.A.); (A.M.C.)
| | - Nathana Mezzalira
- Laboratory of Comparative Physiology of Pigmentation, Department of Physiology, Institute of Biosciences, University of São Paulo, São Paulo 05508-090, Brazil; (J.T.L.); (G.Z.); (N.M.); (O.G.L.); (L.V.M.d.A.); (A.M.C.)
| | - Otoniel G. Lima
- Laboratory of Comparative Physiology of Pigmentation, Department of Physiology, Institute of Biosciences, University of São Paulo, São Paulo 05508-090, Brazil; (J.T.L.); (G.Z.); (N.M.); (O.G.L.); (L.V.M.d.A.); (A.M.C.)
| | - Leonardo V. M. de Assis
- Laboratory of Comparative Physiology of Pigmentation, Department of Physiology, Institute of Biosciences, University of São Paulo, São Paulo 05508-090, Brazil; (J.T.L.); (G.Z.); (N.M.); (O.G.L.); (L.V.M.d.A.); (A.M.C.)
- Institute of Neurobiology, University of Lübeck, 23562 Lübeck, Germany
| | - Ali Guler
- Department of Biology, University of Virginia, Charlottesville, VA 22904, USA;
| | - Ana Maria Castrucci
- Laboratory of Comparative Physiology of Pigmentation, Department of Physiology, Institute of Biosciences, University of São Paulo, São Paulo 05508-090, Brazil; (J.T.L.); (G.Z.); (N.M.); (O.G.L.); (L.V.M.d.A.); (A.M.C.)
- Department of Biology, University of Virginia, Charlottesville, VA 22904, USA;
| | - Maria Nathália Moraes
- Laboratory of Comparative Physiology of Pigmentation, Department of Physiology, Institute of Biosciences, University of São Paulo, São Paulo 05508-090, Brazil; (J.T.L.); (G.Z.); (N.M.); (O.G.L.); (L.V.M.d.A.); (A.M.C.)
- Laboratory of Neurobiology, Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, São Paulo 05508-000, Brazil;
- Correspondence:
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10
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Silva-Gaona OG, Hernández-Ortiz M, Vargas-Ortiz K, Ramírez-Emiliano J, Garay-Sevilla ME, Encarnación-Guevara S, Pérez-Vázquez V. Curcumin prevents proteins expression changes of oxidative phosphorylation, cellular stress response, and lipid metabolism proteins in liver of mice fed a high-fructose diet. J Proteomics 2022; 263:104595. [PMID: 35490921 DOI: 10.1016/j.jprot.2022.104595] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 03/02/2022] [Accepted: 04/10/2022] [Indexed: 12/29/2022]
Abstract
Increased fructose consumption has been associated with the development of metabolic diseases due to the modification in protein expression, altering metabolic and signaling pathways. Curcumin is a natural compound with a regulatory effect on genes and metabolic pathways. To identify the fructose-induced protein expression changes and the effect of curcumin on the change of protein expression in the liver of mice fed a standard diet and a high fructose diet, to elucidate the global role of curcumin. Four groups (n = 4/group) of male mice (C57BL6J) of six-weeks-old were formed. One group received a standard diet (C); another received curcumin at 0.75% w/w in the feed (C + C); one more received 30% w/v fructose in drinking water (F); and one group received 30% w/v fructose in drinking water and 0.75% w/w curcumin in food (F + C); for 15 weeks. Proteomic analysis was performed by LC-MS/MS, using the label-free technique with the MaxQuant programs for identification and Perseus for expression change analysis. Differentially expressed proteins (fold change ≥1.5 and p < 0.5) were analyzed by gene ontology and KEGG. A total of 1047 proteins were identified, of which 113 changed their expression in mice fed fructose, compared to the control group, and curcumin modified the expression of 64 proteins in mice fed fructose and curcumin compared to mice that only received fructose. Curcumin prevented the change of expression of 13 proteins involved in oxidative phosphorylation (NDUFB8, NDUFB3, and ATP5L) in the cellular response to stress (PSMA5, HIST1H1D) and lipid metabolism (THRSP, DGAT1, ECI1, and ACOT13). Curcumin in mice fed the standard diet increased the expression of proteins related to oxidative phosphorylation, ribosomes, and PPAR pathways. In addition to fructose, increased expression of proteins involved in oxidative phosphorylation, ribosomes, lipid metabolism, and carbon metabolism. However, curcumin prevented expression change in 13 hepatic proteins of fructose-fed mice involved in oxidative phosphorylation, cellular stress response, and lipid metabolism. SIGNIFICANCE: Curcumin is a natural compound with a regulatory effect on proteins and metabolic pathways. So, curcumin prevents the change of expression in 13 hepatic proteins of fructose-fed mice involved in oxidative phosphorylation, cellular stress response and lipid metabolism, as a supplement with protector activity on fructose-induced toxic effects.
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Affiliation(s)
- Oscar Gerardo Silva-Gaona
- Departamento de Ciencias Médicas, División de Ciencias de la Salud, Campus León, Universidad de Guanajuato, León, Guanajuato 37320, Mexico
| | - Magdalena Hernández-Ortiz
- Centro de Ciencias Genómicas, Universidad Nacional Autónoma de México, Cuernavaca, Morelos 62210, Mexico
| | - Katya Vargas-Ortiz
- Departamento de Ciencias Médicas, División de Ciencias de la Salud, Campus León, Universidad de Guanajuato, León, Guanajuato 37320, Mexico
| | - Joel Ramírez-Emiliano
- Departamento de Ciencias Médicas, División de Ciencias de la Salud, Campus León, Universidad de Guanajuato, León, Guanajuato 37320, Mexico
| | - Ma Eugenia Garay-Sevilla
- Departamento de Ciencias Médicas, División de Ciencias de la Salud, Campus León, Universidad de Guanajuato, León, Guanajuato 37320, Mexico
| | - Sergio Encarnación-Guevara
- Centro de Ciencias Genómicas, Universidad Nacional Autónoma de México, Cuernavaca, Morelos 62210, Mexico
| | - Victoriano Pérez-Vázquez
- Departamento de Ciencias Médicas, División de Ciencias de la Salud, Campus León, Universidad de Guanajuato, León, Guanajuato 37320, Mexico.
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11
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Usategui-Martín R, Pérez-Castrillón JL, Mansego ML, Lara-Hernández F, Manzano I, Briongos L, Abadía-Otero J, Martín-Vallejo J, García-García AB, Martín-Escudero JC, Chaves FJ. Association between genetic variants in oxidative stress-related genes and osteoporotic bone fracture. The Hortega follow-up study. Gene 2022; 809:146036. [PMID: 34688818 DOI: 10.1016/j.gene.2021.146036] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 10/15/2021] [Accepted: 10/19/2021] [Indexed: 11/20/2022]
Abstract
The most widely accepted etiopathogenesis hypothesis of the origin of osteoporosis and its complications is that they are a consequence of bone aging and other environmental factors, together with a genetic predisposition. Evidence suggests that oxidative stress is crucial in bone pathologies associated with aging. The aim of this study was to determine whether genetic variants in oxidative stress-related genes modified the risk of osteoporotic fracture. We analysed 221 patients and 354 controls from the HORTEGA sample after 12-14 years of follow up. We studied the genotypic and allelic distribution of 53 SNPs in 24 genes involved in oxidative stress. The results showed that being a carrier of the variant allele of the SNP rs4077561 within TXNRD1 was the principal genetic risk factor associated with osteoporotic fracture and that variant allele of the rs1805754 M6PR, rs4964779 TXNRD1, rs406113 GPX6, rs2281082 TXN2 and rs974334 GPX6 polymorphisms are important genetic risk factors for fracture. This study provides information on the genetic factors associated with oxidative stress which are involved in the risk of osteoporotic fracture and reinforces the hypothesis that genetic factors are crucial in the etiopathogenesis of osteoporosis and its complications.
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Affiliation(s)
- Ricardo Usategui-Martín
- IOBA, University of Valladolid, Valladolid. Spain; Cooperative Health Network for Research (RETICS), Oftared, National Institute of Health Carlos III, ISCIII, Madrid. Spain.
| | - José Luis Pérez-Castrillón
- Department of Internal Medicine, Rio Hortega Universitary Hospital, Valladolid, Spain; Department of Medicine. Faculty of Medicine. University of Valladolid, Valladolid, Spain.
| | - María L Mansego
- Genomic and Genetic Diagnosis Unit, INCLIVA Biomedical Research Institute, Valencia, Spain; Department of Bioinformatics. Making Genetics S.L. Pamplona. Spain
| | | | - Iris Manzano
- Genomic and Genetic Diagnosis Unit, INCLIVA Biomedical Research Institute, Valencia, Spain
| | - Laisa Briongos
- Department of Internal Medicine, Rio Hortega Universitary Hospital, Valladolid, Spain; Department of Medicine. Faculty of Medicine. University of Valladolid, Valladolid, Spain
| | - Jesica Abadía-Otero
- Department of Internal Medicine, Rio Hortega Universitary Hospital, Valladolid, Spain
| | - Javier Martín-Vallejo
- Department of Statistics. University of Salamanca. Salamanca Biomedical Research Institute (IBSAL), Salamanca. Spain
| | - Ana B García-García
- Genomic and Genetic Diagnosis Unit, INCLIVA Biomedical Research Institute, Valencia, Spain; CIBER of Diabetes and Associated Metabolic Diseases (CIBERDEM), Madrid. Spain
| | - Juan Carlos Martín-Escudero
- Department of Internal Medicine, Rio Hortega Universitary Hospital, Valladolid, Spain; Department of Medicine. Faculty of Medicine. University of Valladolid, Valladolid, Spain
| | - Felipe J Chaves
- Genomic and Genetic Diagnosis Unit, INCLIVA Biomedical Research Institute, Valencia, Spain; CIBER of Diabetes and Associated Metabolic Diseases (CIBERDEM), Madrid. Spain
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12
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Wan XL, Li N, Chen YJ, Chen XS, Yang Z, Xu L, Yang HM, Wang ZY. Protective effects of lycopene on mitochondrial oxidative injury and dysfunction in the liver of aflatoxin B 1-exposed broilers. Poult Sci 2021; 100:101441. [PMID: 34547623 PMCID: PMC8456063 DOI: 10.1016/j.psj.2021.101441] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Revised: 08/10/2021] [Accepted: 08/15/2021] [Indexed: 11/23/2022] Open
Abstract
This study was conducted to investigate the effects of lycopene (LYC) on mitochondrial oxidative injury and dysfunction in the liver of aflatoxin B1 (AFB1)-exposed broilers. A total of 192 healthy 1-day-old male broilers were randomly divided into 3 groups with 8 replicates of 8 birds each. Birds in the 3 groups were fed basal diet (control), basal diet with 100 µg/kg AFB1, and basal diet with 100 µg/kg AFB1 and 200 mg/kg LYC, respectively. The experiment lasted 42 d. The results showed that AFB1 decreased average daily body weight gain (ADG), average daily feed intake, and gain to feed ratio (G :F) compared to the control group, the LYC supplementation increased ADG and G/F compared to AFB1 group (P < 0.05). Broilers in the AFB1 group had lower mitochondrial glutathione (mGSH) concentration and glutathione peroxidase (GSH-Px), manganese superoxide dismutase (MnSOD), and thioredoxin reductase activities, and higher hydrogen peroxide (H2O2) and reactive oxygen species (ROS) concentrations than the control group (P < 0.05). The LYC increased mGSH concentration and GSH-Px and MnSOD activities, and decreased H2O2 and ROS concentrations compared to AFB1 group (P < 0.05). Broilers fed the AFB1 diet showed increased mitochondrial swelling and decreased adenosine triphosphate concentration than the control group, and LYC had opposite effects (P < 0.05). The AFB1 decreased the activities of mitochondrial electron transfer chain (ETC) complexes I, II, III, and V, downregulated the mRNA expression levels of hepatic MnSOD, thioredoxin 2, thioredoxin reductase, peroxiredoxin-3, peroxisome proliferator-activated receptor γ coactivator 1α, nuclear respiratory factor 1, and mitochondrial transcription factor A compared with the control group (P < 0.05), and LYC increased activities of mitochondrial ETC complexes III and V, and upregulated mRNA expression levels of these genes in comparison to AFB1 group (P < 0.05). In conclusion, the LYC protected broilers from AFB1-induced liver mitochondrial oxidative injury and dysfunction by stimulating mitochondrial antioxidant capacity and maintaining mitochondrial biogenesis.
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Affiliation(s)
- X L Wan
- College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu Province, 225009, P. R. China
| | - N Li
- College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu Province, 225009, P. R. China
| | - Y J Chen
- College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu Province, 225009, P. R. China
| | - X S Chen
- College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu Province, 225009, P. R. China
| | - Z Yang
- Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu Province, 225009, P. R. China
| | - L Xu
- College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu Province, 225009, P. R. China
| | - H M Yang
- College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu Province, 225009, P. R. China
| | - Z Y Wang
- College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu Province, 225009, P. R. China; Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu Province, 225009, P. R. China.
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13
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Su Y, Li L, Farooq MU, Huang X, Zheng T, Zhang YJ, Ei HH, Panhwar FH, Tang Z, Zeng R, Liang Y, Ye X, Jia X, Zhu J. Rescue effects of Se-enriched rice on physiological and biochemical characteristics in cadmium poisoning mice. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:20023-20033. [PMID: 33409993 DOI: 10.1007/s11356-020-11854-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 11/26/2020] [Indexed: 06/12/2023]
Abstract
Cadmium (Cd) is an element injurious for human health and is possibly toxic to organisms at minor concentrations. While some of other trace metallic elements have antagonistic features to it. One of them is the interaction between selenium (Se) and Cd in plant different organs. Literature review disclosed that the intake of Se to some extent can reduce the accumulation of Cd in plants, while the research on of trace metallic elements (Cd) and Se-enriched food (rice) in the living body has rarely been reported. This study intended to explore whether there was a mitigating effect of Se-enriched rice on mice poisoned with Cd. A mouse model of low-dose and high-dose Cd poisoning was established (supplemented with cadmium chloride(CdCl2·2½H20)), followed by feeding two groups (1) Se-enriched rice and (2) setting an equal amount of inorganic Se group. After that, the impact of Se-enriched rice on the antioxidant activity was evaluated. The Se-enriched diet enhanced the total antioxidant capacity (T-AOC), superoxide dismutase (SOD), and enzyme activities of GSH peroxidase (GSH-Px) in mice livers and kidney whereas significantly decreased the malondialdehyde (MDA) contents. Moreover, the degree of physiological damage in mice with low cadmium poisoning was significantly alleviated, and the expression of antioxidant genes (Nrf-2, GPX1, TrxR2, TNF-2) was increased. In conclusion, the Se-enriched diet has a positive effect on the biological effects in mice, and it can be used as a daily diet to resist damage to the body's low Cd state and support enzymatic antioxidant systems by eliminating oxidative injury.
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Affiliation(s)
- Yang Su
- Rice Research Institute, Sichuan Agricultural University, 211, Huimin Road, Wenjiang District, Chengdu, 611130, Sichuan, China
| | - Ling Li
- Rice Research Institute, Sichuan Agricultural University, 211, Huimin Road, Wenjiang District, Chengdu, 611130, Sichuan, China
| | - Muhammad Umer Farooq
- Rice Research Institute, Sichuan Agricultural University, 211, Huimin Road, Wenjiang District, Chengdu, 611130, Sichuan, China
- Department of Botany, Faculty of Life Sciences, University of Okara, Okara, 56130, Pakistan
| | - Xin Huang
- Rice Research Institute, Sichuan Agricultural University, 211, Huimin Road, Wenjiang District, Chengdu, 611130, Sichuan, China
| | - Tengda Zheng
- Rice Research Institute, Sichuan Agricultural University, 211, Huimin Road, Wenjiang District, Chengdu, 611130, Sichuan, China
| | - Yu Jie Zhang
- Rice Research Institute, Sichuan Agricultural University, 211, Huimin Road, Wenjiang District, Chengdu, 611130, Sichuan, China
| | - Hla Hla Ei
- Rice Research Institute, Sichuan Agricultural University, 211, Huimin Road, Wenjiang District, Chengdu, 611130, Sichuan, China
| | - Faiz Hussain Panhwar
- Rice Research Institute, Sichuan Agricultural University, 211, Huimin Road, Wenjiang District, Chengdu, 611130, Sichuan, China
| | - Zhichen Tang
- Rice Research Institute, Sichuan Agricultural University, 211, Huimin Road, Wenjiang District, Chengdu, 611130, Sichuan, China
| | - Rui Zeng
- Rice Research Institute, Sichuan Agricultural University, 211, Huimin Road, Wenjiang District, Chengdu, 611130, Sichuan, China
- College of Chemistry and Life Science, Chengdu Normal University, Chengdu, 611130, China
| | - Yuanke Liang
- Rice Research Institute, Sichuan Agricultural University, 211, Huimin Road, Wenjiang District, Chengdu, 611130, Sichuan, China
| | - Xiaoying Ye
- Rice Research Institute, Sichuan Agricultural University, 211, Huimin Road, Wenjiang District, Chengdu, 611130, Sichuan, China
| | - Xiaomei Jia
- Rice Research Institute, Sichuan Agricultural University, 211, Huimin Road, Wenjiang District, Chengdu, 611130, Sichuan, China
| | - Jianqing Zhu
- Rice Research Institute, Sichuan Agricultural University, 211, Huimin Road, Wenjiang District, Chengdu, 611130, Sichuan, China.
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14
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Shields HJ, Traa A, Van Raamsdonk JM. Beneficial and Detrimental Effects of Reactive Oxygen Species on Lifespan: A Comprehensive Review of Comparative and Experimental Studies. Front Cell Dev Biol 2021; 9:628157. [PMID: 33644065 PMCID: PMC7905231 DOI: 10.3389/fcell.2021.628157] [Citation(s) in RCA: 179] [Impact Index Per Article: 59.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Accepted: 01/20/2021] [Indexed: 12/15/2022] Open
Abstract
Aging is the greatest risk factor for a multitude of diseases including cardiovascular disease, neurodegeneration and cancer. Despite decades of research dedicated to understanding aging, the mechanisms underlying the aging process remain incompletely understood. The widely-accepted free radical theory of aging (FRTA) proposes that the accumulation of oxidative damage caused by reactive oxygen species (ROS) is one of the primary causes of aging. To define the relationship between ROS and aging, there have been two main approaches: comparative studies that measure outcomes related to ROS across species with different lifespans, and experimental studies that modulate ROS levels within a single species using either a genetic or pharmacologic approach. Comparative studies have shown that levels of ROS and oxidative damage are inversely correlated with lifespan. While these studies in general support the FRTA, this type of experiment can only demonstrate correlation, not causation. Experimental studies involving the manipulation of ROS levels in model organisms have generally shown that interventions that increase ROS tend to decrease lifespan, while interventions that decrease ROS tend to increase lifespan. However, there are also multiple examples in which the opposite is observed: increasing ROS levels results in extended longevity, and decreasing ROS levels results in shortened lifespan. While these studies contradict the predictions of the FRTA, these experiments have been performed in a very limited number of species, all of which have a relatively short lifespan. Overall, the data suggest that the relationship between ROS and lifespan is complex, and that ROS can have both beneficial or detrimental effects on longevity depending on the species and conditions. Accordingly, the relationship between ROS and aging is difficult to generalize across the tree of life.
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Affiliation(s)
- Hazel J Shields
- Department of Neurology and Neurosurgery, McGill University, Montreal, QC, Canada.,Metabolic Disorders and Complications Program, Research Institute of the McGill University Health Centre, Montreal, QC, Canada.,Brain Repair and Integrative Neuroscience Program, Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Annika Traa
- Department of Neurology and Neurosurgery, McGill University, Montreal, QC, Canada.,Metabolic Disorders and Complications Program, Research Institute of the McGill University Health Centre, Montreal, QC, Canada.,Brain Repair and Integrative Neuroscience Program, Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Jeremy M Van Raamsdonk
- Department of Neurology and Neurosurgery, McGill University, Montreal, QC, Canada.,Metabolic Disorders and Complications Program, Research Institute of the McGill University Health Centre, Montreal, QC, Canada.,Brain Repair and Integrative Neuroscience Program, Research Institute of the McGill University Health Centre, Montreal, QC, Canada.,Division of Experimental Medicine, Department of Medicine, McGill University, Montreal, QC, Canada.,Department of Genetics, Harvard Medical School, Boston, MA, United States
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15
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Ikeno Y. Thioredoxin - a magic bullet or a double-edged sword for mammalian aging? AGING PATHOBIOLOGY AND THERAPEUTICS 2021; 3:17-19. [PMID: 35368730 DOI: 10.31491/apt.2021.06.056] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
After the discovery of thioredoxin as a reductant for many important enzymes in the early 1960s, biological roles of thioredoxin in pathophysiology have been examined using various species and experimental models, e.g., yeast, invertebrates, rodents, and humans. A large number of studies demonstrated that thioredoxin plays an essential role to maintain a reduced cellular environment and possesses many beneficial effects by maintaining cellular/organ functions and against diseases. However, an important question that remains to be answered is whether thioredoxin could attenuate aging by reducing oxidative damage and changing cellular redox state, which alters redox-sensitive signaling pathways. To address this important question, we have been conducting aging studies with transgenic and knockout mice, and transgenic rats to examine whether the upregulation or downregulation of thioredoxin alters lifespan and age-related pathology. Aging studies conducted by our laboratory and others revealed that the roles of thioredoxin on pathophysiology seem to be more complex than our initial expectations as a potential magic bullet to solve the issues with age. Recent studies indicate that thioredoxin could have both beneficial and potentially deleterious effects on aging and age-related diseases. To critically evaluate the biological effects of thioredoxin on aging and age-related diseases, studies require further consideration to assess additional factors, e.g. levels of thioredoxin in different cellular compartments, different effects in each cell/tissue/organ, physiological aging vs. pathology, and/or at different life stages.
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Affiliation(s)
- Yuji Ikeno
- Barshop Institute for Longevity and Aging Studies, San Antonio, TX 78229, USA.,Department of Pathology, The University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA.,Geriatric Research and Education Center, Audie L. Murphy VA Hospital South Texas Veterans Health Care System, San Antonio, TX 78229, USA
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16
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Seco-Cervera M, González-Cabo P, Pallardó FV, Romá-Mateo C, García-Giménez JL. Thioredoxin and Glutaredoxin Systems as Potential Targets for the Development of New Treatments in Friedreich's Ataxia. Antioxidants (Basel) 2020; 9:antiox9121257. [PMID: 33321938 PMCID: PMC7763308 DOI: 10.3390/antiox9121257] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 12/04/2020] [Accepted: 12/07/2020] [Indexed: 12/11/2022] Open
Abstract
The thioredoxin family consists of a small group of redox proteins present in all organisms and composed of thioredoxins (TRXs), glutaredoxins (GLRXs) and peroxiredoxins (PRDXs) which are found in the extracellular fluid, the cytoplasm, the mitochondria and in the nucleus with functions that include antioxidation, signaling and transcriptional control, among others. The importance of thioredoxin family proteins in neurodegenerative diseases is gaining relevance because some of these proteins have demonstrated an important role in the central nervous system by mediating neuroprotection against oxidative stress, contributing to mitochondrial function and regulating gene expression. Specifically, in the context of Friedreich’s ataxia (FRDA), thioredoxin family proteins may have a special role in the regulation of Nrf2 expression and function, in Fe-S cluster metabolism, controlling the expression of genes located at the iron-response element (IRE) and probably regulating ferroptosis. Therefore, comprehension of the mechanisms that closely link thioredoxin family proteins with cellular processes affected in FRDA will serve as a cornerstone to design improved therapeutic strategies.
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Affiliation(s)
- Marta Seco-Cervera
- Centre for Biomedical Research on Rare Diseases (CIBERER), 46010 Valencia, Spain; (M.S.-C.); (P.G.-C.); (F.V.P.)
- Department of Physiology, Faculty of Medicine and Dentistry, Universitat de València (UV), 46010 Valencia, Spain
- Biomedical Research Institute INCLIVA, 46010 Valencia, Spain
| | - Pilar González-Cabo
- Centre for Biomedical Research on Rare Diseases (CIBERER), 46010 Valencia, Spain; (M.S.-C.); (P.G.-C.); (F.V.P.)
- Department of Physiology, Faculty of Medicine and Dentistry, Universitat de València (UV), 46010 Valencia, Spain
- Biomedical Research Institute INCLIVA, 46010 Valencia, Spain
| | - Federico V. Pallardó
- Centre for Biomedical Research on Rare Diseases (CIBERER), 46010 Valencia, Spain; (M.S.-C.); (P.G.-C.); (F.V.P.)
- Department of Physiology, Faculty of Medicine and Dentistry, Universitat de València (UV), 46010 Valencia, Spain
- Biomedical Research Institute INCLIVA, 46010 Valencia, Spain
| | - Carlos Romá-Mateo
- Centre for Biomedical Research on Rare Diseases (CIBERER), 46010 Valencia, Spain; (M.S.-C.); (P.G.-C.); (F.V.P.)
- Department of Physiology, Faculty of Medicine and Dentistry, Universitat de València (UV), 46010 Valencia, Spain
- Biomedical Research Institute INCLIVA, 46010 Valencia, Spain
- Correspondence: (C.R.-M.); (J.L.G.-G.); Tel.: +34-963-864-646 (C.R.-M. & J.L.G.-G.)
| | - José Luis García-Giménez
- Centre for Biomedical Research on Rare Diseases (CIBERER), 46010 Valencia, Spain; (M.S.-C.); (P.G.-C.); (F.V.P.)
- Department of Physiology, Faculty of Medicine and Dentistry, Universitat de València (UV), 46010 Valencia, Spain
- Biomedical Research Institute INCLIVA, 46010 Valencia, Spain
- Correspondence: (C.R.-M.); (J.L.G.-G.); Tel.: +34-963-864-646 (C.R.-M. & J.L.G.-G.)
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17
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Kim MJ, Han C, White K, Park HJ, Ding D, Boyd K, Rothenberger C, Bose U, Carmichael P, Linser PJ, Tanokura M, Salvi R, Someya S. Txn2 haplodeficiency does not affect cochlear antioxidant defenses or accelerate the progression of cochlear cell loss or hearing loss across the lifespan. Exp Gerontol 2020; 141:111078. [PMID: 32866605 DOI: 10.1016/j.exger.2020.111078] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Revised: 07/16/2020] [Accepted: 08/25/2020] [Indexed: 11/16/2022]
Abstract
Thioredoxin 2 (TXN2) is a small redox protein found in nearly all organisms. As a mitochondrial member of the thioredoxin antioxidant defense system, TXN2 interacts with peroxiredoxin 3 (PRDX3) to remove hydrogen peroxide. Accordingly, TXN2 is thought to play an important role in maintaining the appropriate mitochondrial redox environment and protecting the mitochondrial components against oxidative stress. In the current study, we investigated the effects of Txn2 haplodeficiency on cochlear antioxidant defenses, auditory function, and cochlear cell loss across the lifespan in wild-type (WT) and Txn2 heterozygous knockout (Txn2+/-) mice backcrossed onto CBA/CaJ mice, a well-established model of age-related hearing loss. Txn2+/- mice displayed a 58% decrease in TXN2 protein levels in the mitochondria of the inner ears compared to WT mice. However, Txn2 haplodeficiency did not affect the thioredoxin or glutathione antioxidant defense in both the mitochondria and cytosol of the inner ears of young mice. There were no differences in the levels of mitochondrial biogenesis markers, mitochondrial DNA content, or oxidative DNA and protein damage markers in the inner ears between young WT and Txn2+/- mice. In a mouse inner ear cell line, knockdown of Txn2 did not affect cell viability under hydrogen peroxide treatment. Consistent with the tissue and cell line results, there were no differences in hair cell loss or spiral ganglion neuron density between WT and Txn2+/- mice at 3-5 or 23-25 months of age. Furthermore, Txn2 haplodeficiency did not affect auditory brainstem response threshold, wave I latency, or wave I amplitude at 3-5, 15-16, or 23-25 months of age. Therefore, Txn2 haplodeficiency does not affect cochlear antioxidant defenses, accelerate degeneration of cochlear cells, or affect auditory function in mice across the lifespan.
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Affiliation(s)
- Mi-Jung Kim
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, USA
| | - Chul Han
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, USA
| | - Karessa White
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, USA
| | - Hyo-Jin Park
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, USA
| | - Dalian Ding
- Center for Hearing and Deafness, State University of New York at Buffalo, NY, USA
| | - Kevin Boyd
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, USA
| | | | - Upal Bose
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, USA
| | - Peter Carmichael
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, USA
| | - Paul J Linser
- Whitney Laboratory, University of Florida, St Augustine, FL, USA
| | - Masaru Tanokura
- Department of Applied Biological Chemistry, University of Tokyo, Yayoi, Tokyo, Japan
| | - Richard Salvi
- Center for Hearing and Deafness, State University of New York at Buffalo, NY, USA
| | - Shinichi Someya
- Department of Aging and Geriatric Research, University of Florida, Gainesville, FL, USA.
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Interplay between Oxidative Stress, Inflammation, and Amyloidosis in the Anterior Segment of the Eye; Its Pathological Implications. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020; 2020:6286105. [PMID: 32566091 PMCID: PMC7291327 DOI: 10.1155/2020/6286105] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 05/02/2020] [Accepted: 05/11/2020] [Indexed: 12/11/2022]
Abstract
There are different pathologies associated with amyloidogenic processes caused by the increase of reactive oxygen species (ROS) and the overactivation of inflammatory responses. These alterations are present in different regions of the anterior segment of the eye, and they have been associated with the development and progression of ocular pathologies, such as glaucoma, dry eye syndrome, keratitis, and cataracts among other pathologies. Aim. To discuss briefly the anatomical characteristics of the anterior segment of the eye and describe the interaction between oxidative stress (OS) and inflammatory responses, emphasizing the misfolding of several proteins leading to amyloidogenic processes occurring in the anterior segment and their implications in the development of ocular diseases. We performed a search on PubMed, CINAHL, and Embase using the MeSH terms “eye,” “anterior segment”, “inflammation”, “oxidative stress”, and “amyloidosis”. The search encompassed manuscripts published up to April 2019. A hundred forty-four published studies met the inclusion criteria. We present the current knowledge regarding the interaction between OS and the activation of inflammatory processes and how both can cause conformational changes in several peptides and proteins in each compartment of the anterior segment. However, we found that there is no consensus about which factor is the first to cause amyloidosis. Our conclusions suggest that there is an interplay among these factors forming a vicious cycle that leads to the loss of protein structure in ocular pathologies, and multifactorial therapies should be developed to avoid protein misfolding and to stop the progression of ocular pathologies.
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Feng C, Bai K, Wang A, Ge X, Zhao Y, Zhang L, Wang T. Effects of dimethylglycine sodium salt supplementation on growth performance, hepatic antioxidant capacity, and mitochondria-related gene expression in weanling piglets born with low birth weight1. J Anim Sci 2020; 96:3791-3803. [PMID: 29931075 DOI: 10.1093/jas/sky233] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Accepted: 06/19/2018] [Indexed: 12/30/2022] Open
Abstract
Dimethylglycine sodium salt (DMG-Na) has exhibited excellent advantages in animal experiments and human health. The present study aimed to investigate the effects of dietary supplementation with 0.1% DMG-Na on the growth performance, hepatic antioxidant capacity, and mRNA expression of mitochondria-related genes in low birth weight (LBW) piglets during weaning period. Sixteen piglets with normal birth weight (NBW) and 16 LBW piglets were fed either a basal diet or a 0.1% DMG-Na supplemented diet from age of 21 to 49 d. Blood and liver samples were collected at the end of the study. The results showed that compared with NBW piglets, LBW piglets exhibited greater (P < 0.05) alanine aminotransferase (ALT), aspartate aminotransferase (AST), and alkaline phosphatase activities in the serum. LBW decreased (P < 0.05) the activity of glutathione peroxidase and increased (P < 0.05) the contents of malondialdehyde and H2O2 in liver. DMG-Na supplementation increased (P < 0.05) body weight gain, feed intake, and feed efficiency, decreased (P < 0.05) ALT and AST activities, and reduced the content of H2O2 in LBW piglets. LBW piglets had downregulated (P < 0.05) mRNA expression of thioredoxin 2, thioredoxin reductases 2, and nuclear respiratory factor-1 (Nrf1) in the liver. However, DMG-Na supplementation increased (P < 0.05) mRNA expression of Nrf1 in the liver. In conclusion, DMG-Na supplementation has beneficial effects in alleviating LBW-induced hepatic oxidative damage and changed mitochondrial genes expression levels, which is associated with increased antioxidant enzyme activities and up-regulating mRNA gene abundance.
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Affiliation(s)
- Chengcheng Feng
- College of Animal Science and Technology, Nanjing Agricultural University, Xuanwu District, Nanjing, People' s Republic of China
| | - Kaiwen Bai
- College of Animal Science and Technology, Nanjing Agricultural University, Xuanwu District, Nanjing, People' s Republic of China
| | - Anan Wang
- College of Animal Science and Technology, Nanjing Agricultural University, Xuanwu District, Nanjing, People' s Republic of China
| | - Xiaoke Ge
- College of Animal Science and Technology, Nanjing Agricultural University, Xuanwu District, Nanjing, People' s Republic of China
| | - Yongwei Zhao
- College of Animal Science and Technology, Nanjing Agricultural University, Xuanwu District, Nanjing, People' s Republic of China
| | - Lili Zhang
- College of Animal Science and Technology, Nanjing Agricultural University, Xuanwu District, Nanjing, People' s Republic of China
| | - Tian Wang
- College of Animal Science and Technology, Nanjing Agricultural University, Xuanwu District, Nanjing, People' s Republic of China
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Roman MG, Flores LC, Cunningham GM, Cheng C, Dube S, Allen C, Remmen HV, Bai Y, Hubbard GB, Saunders TL, Ikeno Y. Thioredoxin overexpression in mitochondria showed minimum effects on aging and age-related diseases in male C57BL/6 mice. ACTA ACUST UNITED AC 2020; 2:20-31. [PMID: 35356005 PMCID: PMC8963792 DOI: 10.31491/apt.2020.03.009] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
Objective: In this study, the effects of overexpression of thioredoxin 2 (Trx2) on aging and age-related diseases were examined using Trx2 transgenic mice [Tg(TXN2]+/0]. Because our previous studies demonstrated that thioredoxin (Trx) overexpression in the cytosol (Trx1) did not extend maximum lifespan, this study was conducted to test if increased Trx2 expression in mitochondria shows beneficial effects on aging and age-related pathology. Methods: Trx2 transgenic mice were generated using a fragment of the human genome containing the TXN2 gene. Effects of Trx2 overexpression on survival, age-related pathology, oxidative stress, and redox-sensitive signaling pathways were examined in male Tg(TXN2)+/0 mice. Results: Trx2 levels were significantly higher (approximately 1.6- to 5-fold) in all of the tissues we examined in Tg(TXN2)+/0 mice compared to wild-type (WT) littermates, and the expression levels were maintained during aging (up to 22-24 months old). Trx2 overexpression did not alter the levels of Trx1, glutaredoxin, glutathione, or other major antioxidant enzymes. Overexpression of Trx2 was associated with reduced reactive oxygen species (ROS) production from mitochondria and lower isoprostane levels compared to WT mice. When we conducted the survival study, male Tg(TXN2)+/0 mice showed a slight extension (approximately 8-9%] of mean, median, and 10th percentile lifespans; however, the survival curve was not significantly different from WT mice. Cross-sectional pathological analysis (22-24 months old) showed that Tg(TXN2)+/0 mice had a slightly higher severity of lymphoma; however, tumor burden, disease burden, and severity of glomerulonephritis and inflammation were similar to WT mice. Trx2 overexpression was also associated with higher c-Jun and c-Fos levels; however, mTOR activity and levels of NFκB p65 and p50 were similar to WT littermates. Conclusions: Our findings suggest that the increased levels of Trx2 in mitochondria over the lifespan in Tg(TXN2)+/0 mice showed a slight life-extending effect, reduced ROS production from mitochondria and oxidative damage to lipids, but showed no significant effects on aging and age-related diseases.
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Cyclin-Dependent Kinase and Antioxidant Gene Expression in Cancers with Poor Therapeutic Response. Pharmaceuticals (Basel) 2020; 13:ph13020026. [PMID: 32033319 PMCID: PMC7169466 DOI: 10.3390/ph13020026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Revised: 01/26/2020] [Accepted: 01/30/2020] [Indexed: 11/23/2022] Open
Abstract
Pancreatic cancer, hepatocellular carcinoma (HCC), and mesothelioma are treatment-refractory cancers, and patients afflicted with these cancers generally have a very poor prognosis. The genomics of these tumors were analyzed as part of The Cancer Genome Atlas (TCGA) project. However, these analyses are an overview and may miss pathway interactions that could be exploited for therapeutic targeting. In this study, the TCGA Pan-Cancer datasets were queried via cBioPortal for correlations among mRNA expression of key genes in the cell cycle and mitochondrial (mt) antioxidant defense pathways. Here we describe these correlations. The results support further evaluation to develop combination treatment strategies that target these two critical pathways in pancreatic cancer, hepatocellular carcinoma, and mesothelioma.
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Roman MG, Flores LC, Cunningham GM, Cheng C, Allen C, Hubbard GB, Bai Y, Saunders TL, Ikeno Y. Thioredoxin and aging: What have we learned from the survival studies? AGING PATHOBIOLOGY AND THERAPEUTICS 2020; 2:126-133. [PMID: 35493763 DOI: 10.31491/apt.2020.09.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Our laboratory has conducted the first systematic survival studies to examine the biological effects of the antioxidant protein thioredoxin (Trx) on aging and age-related pathology. Our studies with C57BL/6 mice overexpressing Trx1 [Tg(act-TRX1)+/0 and Tg(TXN)+/0) demonstrated a slight extension in early lifespan compared to wild-type (WT) mice; however, no significant effects were observed in the later part of life. Overexpression of Trx2 in male C57BL/6 mice [Tg(TXN2)+/0] demonstrated a slightly extended lifespan compared to WT mice. The pathology results from two lines of Trx1 transgenic mice showed a slightly higher incidence of age-related neoplastic diseases compared to WT mice, and a slight increase in the severity of lymphoma, a major neoplastic disease, was observed in Trx2 transgenic mice. Together these studies indicate that Trx overexpression in one compartment of the cell (cytosol or mitochondria alone) has marginal beneficial effects on lifespan. On the other hand, down-regulation of Trx in either the cytosol (Trx1KO) or mitochondria (Trx2KO) showed no significant changes in lifespan compared to WT mice, despite several changes in pathophysiology of these knockout mice. When we examined the synergetic effects of overexpressing Trx1 and Trx2, TXNTg x TXN2Tg mice showed a significantly shorter lifespan with accelerated cancer development compared to WT mice. These results suggest that synergetic effects of Trx overexpression in both the cytosol and mitochondria on aging are deleterious and the development of age-related cancer is accelerated. On the other hand, we have recently found that down-regulation of Trx in both the cytosol and mitochondria in Trx1KO x Trx2KO mice has beneficial effects on aging. The results generated from our lab along with our ongoing study using Trx1KO x Trx2KO mice could elucidate the key pathways (i.e., apoptosis and autophagy) that prevent accumulation of damaged cells and genomic instability leading to reduced cancer formation.
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Affiliation(s)
- Madeline G Roman
- Barshop Institute for Longevity and Aging Studies,The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Lisa C Flores
- Barshop Institute for Longevity and Aging Studies,The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Geneva M Cunningham
- Barshop Institute for Longevity and Aging Studies,The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Christie Cheng
- Barshop Institute for Longevity and Aging Studies,The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Colton Allen
- Barshop Institute for Longevity and Aging Studies,The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Gene B Hubbard
- Barshop Institute for Longevity and Aging Studies,The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA.,Department of Pathology, The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Yidong Bai
- Department of Cell Systems & Anatomy, The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Thomas L Saunders
- Transgenic Animal Model Core, University of Michigan, Ann Arbor, MI, USA
| | - Yuji Ikeno
- Barshop Institute for Longevity and Aging Studies,The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA.,Department of Pathology, The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA.,Geriatric Research and Education Clinical Center, Audie L. Murphy VA Hospital, South Texas Veterans Health Care System, San Antonio, TX, USA
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van Gastel J, Leysen H, Santos-Otte P, Hendrickx JO, Azmi A, Martin B, Maudsley S. The RXFP3 receptor is functionally associated with cellular responses to oxidative stress and DNA damage. Aging (Albany NY) 2019; 11:11268-11313. [PMID: 31794429 PMCID: PMC6932917 DOI: 10.18632/aging.102528] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Accepted: 11/18/2019] [Indexed: 12/19/2022]
Abstract
DNA damage response (DDR) processes, often caused by oxidative stress, are important in aging and -related disorders. We recently showed that G protein-coupled receptor (GPCR) kinase interacting protein 2 (GIT2) plays a key role in both DNA damage and oxidative stress. Multiple tissue analyses in GIT2KO mice demonstrated that GIT2 expression affects the GPCR relaxin family peptide 3 receptor (RXFP3), and is thus a therapeutically-targetable system. RXFP3 and GIT2 play similar roles in metabolic aging processes. Gaining a detailed understanding of the RXFP3-GIT2 functional relationship could aid the development of novel anti-aging therapies. We determined the connection between RXFP3 and GIT2 by investigating the role of RXFP3 in oxidative stress and DDR. Analyzing the effects of oxidizing (H2O2) and DNA-damaging (camptothecin) stressors on the interacting partners of RXFP3 using Affinity Purification-Mass Spectrometry, we found multiple proteins linked to DDR and cell cycle control. RXFP3 expression increased in response to DNA damage, overexpression, and Relaxin 3-mediated stimulation of RXFP3 reduced phosphorylation of DNA damage marker H2AX, and repair protein BRCA1, moderating DNA damage. Our data suggests an RXFP3-GIT2 system that could regulate cellular degradation after DNA damage, and could be a novel mechanism for mitigating the rate of age-related damage accumulation.
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Affiliation(s)
- Jaana van Gastel
- Receptor Biology Lab, Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium.,Translational Neurobiology Group, Centre for Molecular Neuroscience, VIB, Antwerp, Belgium
| | - Hanne Leysen
- Receptor Biology Lab, Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium.,Translational Neurobiology Group, Centre for Molecular Neuroscience, VIB, Antwerp, Belgium
| | - Paula Santos-Otte
- Center for Molecular and Cellular Bioengineering (CMCB), Technische Universität Dresden, Dresden, Germany
| | - Jhana O Hendrickx
- Receptor Biology Lab, Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium.,Translational Neurobiology Group, Centre for Molecular Neuroscience, VIB, Antwerp, Belgium
| | - Abdelkrim Azmi
- Translational Neurobiology Group, Centre for Molecular Neuroscience, VIB, Antwerp, Belgium
| | - Bronwen Martin
- Faculty of Pharmaceutical, Veterinary and Biomedical Science, University of Antwerp, Antwerp, Belgium
| | - Stuart Maudsley
- Receptor Biology Lab, Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium.,Translational Neurobiology Group, Centre for Molecular Neuroscience, VIB, Antwerp, Belgium
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24
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Overview of thioredoxin system and targeted therapies for acute leukemia. Mitochondrion 2019; 47:38-46. [DOI: 10.1016/j.mito.2019.04.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 03/15/2019] [Accepted: 04/24/2019] [Indexed: 12/11/2022]
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25
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Chasapis CT, Makridakis M, Damdimopoulos AE, Zoidakis J, Lygirou V, Mavroidis M, Vlahou A, Miranda-Vizuete A, Spyrou G, Vlamis-Gardikas A. Implications of the mitochondrial interactome of mammalian thioredoxin 2 for normal cellular function and disease. Free Radic Biol Med 2019; 137:59-73. [PMID: 31018154 DOI: 10.1016/j.freeradbiomed.2019.04.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 04/15/2019] [Indexed: 12/23/2022]
Abstract
Multiple thioredoxin isoforms exist in all living cells. To explore the possible functions of mammalian mitochondrial thioredoxin 2 (Trx2), an interactome of mouse Trx2 was initially created using (i) a monothiol mouse Trx2 species for capturing protein partners from different organs and (ii) yeast two hybrid screens on human liver and rat brain cDNA libraries. The resulting interactome consisted of 195 proteins (Trx2 included) plus the mitochondrial 16S RNA. 48 of these proteins were classified as mitochondrial (MitoCarta2.0 human inventory). In a second step, the mouse interactome was combined with the current four-membered mitochondrial sub-network of human Trx2 (BioGRID) to give a 53-membered human Trx2 mitochondrial interactome (52 interactor proteins plus the mitochondrial 16S RNA). Although thioredoxins are thiol-employing disulfide oxidoreductases, approximately half of the detected interactions were not due to covalent disulfide bonds. This finding reinstates the extended role of thioredoxins as moderators of protein function by specific non-covalent, protein-protein interactions. Analysis of the mitochondrial interactome suggested that human Trx2 was involved potentially in mitochondrial integrity, formation of iron sulfur clusters, detoxification of aldehydes, mitoribosome assembly and protein synthesis, protein folding, ADP ribosylation, amino acid and lipid metabolism, glycolysis, the TCA cycle and the electron transport chain. The oxidoreductase functions of Trx2 were verified by its detected interactions with mitochondrial peroxiredoxins and methionine sulfoxide reductase. Parkinson's disease, triosephosphate isomerase deficiency, combined oxidative phosphorylation deficiency, and lactate dehydrogenase b deficiency are some of the diseases where the proposed mitochondrial network of Trx2 may be implicated.
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Affiliation(s)
- Christos T Chasapis
- Institute of Chemical Engineering Sciences (ICE-HT), Foundation for Research and Technology, Hellas (FORTH), Platani 26504, Greece
| | | | - Anastassios E Damdimopoulos
- Department of Biosciences and Nutrition, Center for Innovative Medicine (CIMED), Karolinska Institutet, Huddinge, Sweden
| | - Jerome Zoidakis
- Biomedical Research Foundation, Academy of Athens (BRFAA), Athens, Greece
| | - Vasiliki Lygirou
- Biomedical Research Foundation, Academy of Athens (BRFAA), Athens, Greece
| | - Manolis Mavroidis
- Biomedical Research Foundation, Academy of Athens (BRFAA), Athens, Greece
| | - Antonia Vlahou
- Biomedical Research Foundation, Academy of Athens (BRFAA), Athens, Greece
| | - Antonio Miranda-Vizuete
- Redox Homeostasis Group, Instituto de Biomedicina de Sevilla (IBIS), Hospital Universitario Virgen del Rocío/CSIC/Universidad de Sevilla, 41013 Sevilla, Spain
| | - Giannis Spyrou
- Department of Clinical and Experimental Medicine, Division of Clinical Chemistry, Linköping University, S-581 85 Linköping, Sweden
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Bai K, Jiang L, Zhu S, Feng C, Zhao Y, Zhang L, Wang T. Dimethylglycine sodium salt protects against oxidative damage and mitochondrial dysfunction in the small intestines of mice. Int J Mol Med 2019; 43:2199-2211. [PMID: 30816456 DOI: 10.3892/ijmm.2019.4093] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Accepted: 02/07/2019] [Indexed: 11/06/2022] Open
Abstract
Few studies have investigated the use of dimethylglycine sodium salt (DMG‑Na) to protect against small intestinal damage, despite its prevalence in the treatment of human diseases. The present study aimed to evaluate the protective effects of DMG‑Na against oxidative damage and mitochondrial dysfunction in the small intestines of mice. A total of 100 male Kunming mice were randomly assigned to five groups (n=20 per group): i) Mice gastric intubation with 0.3 ml sterile saline solution (once), then subcutaneously injected with sterile saline solution (0.5 ml) after 1 h (CON); ii) mice gastric intubation with 12 mg DMG‑Na/0.3 ml of sterile saline solution once, then subcutaneously injected with sterile saline solution (0.5 ml) 1 h later (D); iii) mice gastric intubation with 0.3 ml sterile saline solution once, then subcutaneously injected with indomethacin (10 mg/kg BW) 1 h later (IN); iv) mice gastric intubation with 12 mg DMG‑Na/0.3 ml sterile saline solution once, then subcutaneously injected with indomethacin (10 mg/kg BW) 1 h later (DIN); and v) mice subcutaneously injected with indomethacin (10 mg/kg BW), then gastrically intubated with 12 mg DMG‑Na/0.3 ml sterile saline solution once after 1 h (IND). The present study was evaluated the effects of DMG‑Na on mice intestinal damage induced by indomethacin injection. The histological morphology of the small intestine improved (P<0.05) in the DIN and IND groups, compared with the IN group. The antioxidant system was enhanced, oxidative damage was reduced, and the expression of antioxidant‑associated genes was increased in the small intestine and its mitochondria in the DIN and IND groups, compared with the IN group. The above results suggested that pretreatment and treatment with DMG‑Na reduced oxidative damage by enhancing antioxidant capacity, increasing the expression of antioxidant‑associated genes, ameliorating mitochondrial dysfunction and suppressing apoptosis. Further study is required to determine the specific mechanism by which pretreatment and treatment with DMG‑Na reduced small intestinal damage.
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Affiliation(s)
- Kaiwen Bai
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu 210095, P.R. China
| | - Luyi Jiang
- College of Animal Science, Zhejiang University, Hangzhou, Zhejiang 310058, P.R. China
| | - Shanli Zhu
- College of Agriculture and Life Science, Department of Animal Science, Cornell University, Ithaca, NY 14853, USA
| | - Chengcheng Feng
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu 210095, P.R. China
| | - Yongwei Zhao
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu 210095, P.R. China
| | - Lili Zhang
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu 210095, P.R. China
| | - Tian Wang
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu 210095, P.R. China
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Weiss RA, Bernardy J. Induction of fat apoptosis by a non-thermal device: Mechanism of action of non-invasive high-intensity electromagnetic technology in a porcine model. Lasers Surg Med 2018; 51:47-53. [PMID: 30549290 PMCID: PMC6590311 DOI: 10.1002/lsm.23039] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/24/2018] [Indexed: 12/30/2022]
Abstract
Objectives While controlled thermal changes in subcutaneous tissue have been used to trigger apoptosis of fat cells and have been proven clinically efficacious, another mechanism of electromagnetic stress suggests that fat apoptosis could be achieved by a non‐thermal manner as well. This animal model study investigates the use of a non‐invasive high‐intensity magnetic field device to induce apoptosis in fat cells. Methods Yorkshire pigs (N = 2) received one treatment (30 minutes) in the abdominal area using a High‐Intensity Focused Electromagnetic (HIFEM) device. Punch biopsy samples of fat tissue and blood samples were collected at the baseline, 1 and 8 hours after the treatment. Biopsy samples were sectioned and evaluated for the levels of an apoptotic index (AI) by the TUNEL method. Statistical significance was examined using the rANOVA and Tukey's test (α 5%). Biopsy samples were also assessed for molecular biomarkers. Blood samples were evaluated to determine changes related to fat and muscle metabolism. Free fatty acids (FFA), triacylglycerol (TG), glycerol and glucose (Glu) were used as the main biomarkers of fat metabolism. Creatinine, creatinine kinase (CK), lactate dehydrogenase (LDH) and interleukin 6 (IL6) served as the main biomarkers to evaluate muscle metabolism. Results In treated pigs, a statistically significant increase in the apoptotic index (AI) (P = 1.17E‐4) was observed. A significant difference was found between AI at baseline (AI = 18.75%) and 8‐hours post‐treatment (AI = 35.95%). Serum levels of fat and muscle metabolism indicated trends (FFA −0.32 mmol · l−1, −28.1%; TG −0.24 mmol · l−1, −51.8%; Glycerol −5.68 mg · l−1, −54.8%; CK +67.58 μkat · l−1, +227.8%; LDH +4.9 μkat · l−1,+35.4%) suggesting that both adipose and muscle tissue were affected by HIFEM treatment. No adverse events were noted to skin and surrounding tissue. Conclusions Application of a high‐intensity electromagnetic field in a porcine model results in adipocyte apoptosis. The analysis of serum levels suggests that HIFEM treatment influences fat and muscle metabolism. Lasers Surg. Med. 51:47–53, 2019. © 2018 The Authors. Lasers in Surgery and Medicine Published by Wiley Periodicals, Inc.
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Affiliation(s)
- Robert A Weiss
- Maryland Laser Skin, & Vein Institute, Hunt Valley, Maryland
| | - Jan Bernardy
- Veterinary Research Institute, Brno, Czech Republic
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Flores LC, Roman MG, Cunningham GM, Cheng C, Dube S, Allen C, Van Remmen H, Hubbard GB, Saunders TL, Ikeno Y. Continuous overexpression of thioredoxin 1 enhances cancer development and does not extend maximum lifespan in male C57BL/6 mice. PATHOBIOLOGY OF AGING & AGE RELATED DISEASES 2018; 8:1533754. [PMID: 30370017 PMCID: PMC6201794 DOI: 10.1080/20010001.2018.1533754] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 08/14/2018] [Accepted: 09/20/2018] [Indexed: 11/23/2022]
Abstract
We examined the effects of continuous overexpression of thioredoxin (Trx) 1 on aging in Trx1 transgenic mice [Tg(TXN)+/0]. This study was conducted to test whether increased thioredoxin expression over the lifespan in mice would alter aging and age-related pathology because our previous study demonstrated that Tg(act-TXN)+/0 mice had no significant maximum life extension, possibly due to the use of actin as a promoter, which may have resulted in loss of Trx1 overexpression during aging. To test this hypothesis, we generated new Trx1 transgenic mice using a fragment of the human genome containing the TXN gene with an endogenous promoter to ensure continuous overexpression of Trx1 throughout the lifespan. Universal overexpression of Trx1 was observed, and Trx1 overexpression was maintained during aging (up to 22–24 months old) in the Tg(TXN)+/0 mice. The levels of Trx1 are significantly higher (approximately 4 to 31 fold) in all of the tissues examined in the Tg(TXN)+/0 mice compared to the wild-type (WT) littermates. The overexpression of Trx1 did not cause any changes in the levels of Trx2, glutaredoxin, glutathione, or other major antioxidant enzymes. The survival study demonstrated that male Tg(TXN)+/0 mice slightly extended the earlier part of the lifespan compared to WT littermates, but no significant life extension was observed over the lifespan. The cross-sectional pathological analysis (22–25 months old) showed that Tg(TXN)+/0 mice had a significantly higher severity of lymphoma and more tumor burden than WT mice, which was associated with the suppression of the apoptosis signal-regulating kinase 1 (ASK1) pathway. Our findings suggest that the increased levels of Trx1 over the lifespan in Tg(TXN)+/0 mice showed some beneficial effects (slight extension of lifespan) in the earlier part of life but had no significant effects on median or maximum lifespans, and increased Trx1 levels enhanced tumor development in old mice.
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Affiliation(s)
- Lisa C Flores
- Barshop Institute for Longevity and Aging Studies, The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Madeline G Roman
- Barshop Institute for Longevity and Aging Studies, The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Geneva M Cunningham
- Barshop Institute for Longevity and Aging Studies, The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Christie Cheng
- Barshop Institute for Longevity and Aging Studies, The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Sara Dube
- Barshop Institute for Longevity and Aging Studies, The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Colton Allen
- Barshop Institute for Longevity and Aging Studies, The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Holly Van Remmen
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
| | - Gene B Hubbard
- Barshop Institute for Longevity and Aging Studies, The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA.,Department of Pathology, The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Thomas L Saunders
- Transgenic Animal Model Core, University of Michigan, Ann Arbor, MI, USA
| | - Yuji Ikeno
- Barshop Institute for Longevity and Aging Studies, The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA.,Department of Pathology, The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA.,Geriatric Research Education and Clinical Center (GRECC), Audie L. Murphy VA Hospital, South Texas Veterans Health Care System, San Antonio, TX, USA
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Zhang J, Bai KW, He J, Niu Y, Lu Y, Zhang L, Wang T. Curcumin attenuates hepatic mitochondrial dysfunction through the maintenance of thiol pool, inhibition of mtDNA damage, and stimulation of the mitochondrial thioredoxin system in heat-stressed broilers. J Anim Sci 2018; 96:867-879. [PMID: 29566233 DOI: 10.1093/jas/sky009] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2017] [Accepted: 03/06/2018] [Indexed: 12/18/2022] Open
Abstract
The aim of this study was to investigate the effects of dietary curcumin supplementation on the performance, mitochondrial redox system, mitochondrial DNA (mtDNA) integrity, and antioxidant-related gene expression in the liver of broiler chickens after heat stress treatment. At day 21, a total of 400 Arbor Acres broiler chickens with similar body weight (BW) were divided into 5 groups with 8 replicates per group and then reared either at a normal temperature (22 ± 1 °C) or at a high ambient temperature (34 ± 1 °C for 8 h and 22 ± 1 °C for the remaining time) for 20 d. Broilers in the 5 groups were fed a basal diet at a normal temperature (NT group) and a basal diet with 0, 50, 100, and 200 mg/kg curcumin at a high ambient temperature (HT, CUR50, CUR100, and CUR200 groups), respectively. The serum and liver samples were analyzed for the parameters related to hepatic damage, mitochondrial function, and redox status. The results showed that the G:F was increased in the CUR50 and CUR100 groups, and the final BW was increased in CUR100 group in comparison with the HT group (P < 0.05). When compared with those in the HT group, both serum aspartate and alanine aminotransferase activities were decreased in the curcumin-supplemented groups (P < 0.05). Curcumin decreased the reactive oxygen species (ROS) production but increased the mitochondrial membrane potential in the hepatocytes of the broilers after heat stress (P < 0.05). The broilers in curcumin-supplemented groups had lower malondialdehyde and protein carbonyl concentrations as well as greater thiol concentrations (P < 0.05). The mitochondrial manganese superoxide dismutase (MnSOD) activity in the liver was increased (P < 0.05) in the CUR100 group compared with the HT group. Compared with the heat-stressed broilers, the broilers that were fed curcumin had greater (P < 0.05) mtDNA copy number and ATP concentrations than those in the HT group. Curcumin supplementation attenuated the depression of the thioredoxin 2 and peroxiredoxin-3 gene expressions (P < 0.05). The MnSOD gene expression was increased in the CUR100 and CUR200 groups, and the thioredoxin reductase 2 gene expression was increased in the CUR50 group in comparison with the HT group (P < 0.05). In conclusion, curcumin mitigated the mitochondrial dysfunction in heat-stressed broilers, as evidenced by the suppression of the ROS burst, the maintenance of the thiol pool and mtDNA content, and the enhanced mitochondrial antioxidant gene expression.
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Affiliation(s)
- Jingfei Zhang
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Kai Wen Bai
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Jintian He
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Yu Niu
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Yuan Lu
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Lili Zhang
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Tian Wang
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
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Thioredoxin overexpression in both the cytosol and mitochondria accelerates age-related disease and shortens lifespan in male C57BL/6 mice. GeroScience 2018; 40:453-468. [PMID: 30121784 DOI: 10.1007/s11357-018-0039-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Accepted: 08/09/2018] [Indexed: 10/28/2022] Open
Abstract
To investigate the role of increased levels of thioredoxin (Trx) in both the cytosol (Trx1) and mitochondria (Trx2) on aging, we have conducted a study to examine survival and age-related diseases using male mice overexpressing Trx1 and Trx2 (TXNTg × TXN2Tg). Our study demonstrated that the upregulation of Trx in both the cytosol and mitochondria in male TXNTg × TXN2Tg C57BL/6 mice resulted in a significantly shorter lifespan compared to wild-type (WT) mice. Cross-sectional pathology data showed a slightly higher incidence of neoplastic diseases in TXNTg × TXN2Tg mice than WT mice. The incidence of lymphoma, a major neoplastic disease in C57BL/6 mice, was slightly higher in TXNTg × TXN2Tg mice than in WT mice, and more importantly, the severity of lymphoma was significantly higher in TXNTg × TXN2Tg mice compared to WT mice. Furthermore, the total number of histopathological changes in the whole body (disease burden) was significantly higher in TXNTg × TXN2Tg mice compared to WT mice. Therefore, our study suggests that overexpression of Trx in both the cytosol and mitochondria resulted in deleterious effects on aging and accelerated the development of age-related diseases, especially cancer, in male C57BL/6 mice.
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The Good, the Bad, and the Ugly of ROS: New Insights on Aging and Aging-Related Diseases from Eukaryotic and Prokaryotic Model Organisms. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2018; 2018:1941285. [PMID: 29743972 PMCID: PMC5878877 DOI: 10.1155/2018/1941285] [Citation(s) in RCA: 89] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Revised: 12/18/2017] [Accepted: 01/02/2018] [Indexed: 12/13/2022]
Abstract
Aging is associated with the accumulation of cellular damage over the course of a lifetime. This process is promoted in large part by reactive oxygen species (ROS) generated via cellular metabolic and respiratory pathways. Pharmacological, nonpharmacological, and genetic interventions have been used to target cellular and mitochondrial networks in an effort to decipher aging and age-related disorders. While ROS historically have been viewed as a detrimental byproduct of normal metabolism and associated with several pathologies, recent research has revealed a more complex and beneficial role of ROS in regulating metabolism, development, and lifespan. In this review, we summarize the recent advances in ROS research, focusing on both the beneficial and harmful roles of ROS, many of which are conserved across species from bacteria to humans, in various aspects of cellular physiology. These studies provide a new context for our understanding of the parts ROS play in health and disease. Moreover, we highlight the utility of bacterial models to elucidate the molecular pathways by which ROS mediate aging and aging-related diseases.
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Abstract
Reactive oxygen species (ROS) are well known for their role in mediating both physiological and pathophysiological signal transduction. Enzymes and subcellular compartments that typically produce ROS are associated with metabolic regulation, and diseases associated with metabolic dysfunction may be influenced by changes in redox balance. In this review, we summarize the current literature surrounding ROS and their role in metabolic and inflammatory regulation, focusing on ROS signal transduction and its relationship to disease progression. In particular, we examine ROS production in compartments such as the cytoplasm, mitochondria, peroxisome, and endoplasmic reticulum and discuss how ROS influence metabolic processes such as proteasome function, autophagy, and general inflammatory signaling. We also summarize and highlight the role of ROS in the regulation metabolic/inflammatory diseases including atherosclerosis, diabetes mellitus, and stroke. In order to develop therapies that target oxidative signaling, it is vital to understand the balance ROS signaling plays in both physiology and pathophysiology, and how manipulation of this balance and the identity of the ROS may influence cellular and tissue homeostasis. An increased understanding of specific sources of ROS production and an appreciation for how ROS influence cellular metabolism may help guide us in the effort to treat cardiovascular diseases.
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Affiliation(s)
- Steven J Forrester
- From the Division of Cardiology, Department of Medicine, Emory University, Atlanta GA
| | - Daniel S Kikuchi
- From the Division of Cardiology, Department of Medicine, Emory University, Atlanta GA
| | - Marina S Hernandes
- From the Division of Cardiology, Department of Medicine, Emory University, Atlanta GA
| | - Qian Xu
- From the Division of Cardiology, Department of Medicine, Emory University, Atlanta GA
| | - Kathy K Griendling
- From the Division of Cardiology, Department of Medicine, Emory University, Atlanta GA.
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Liu T, Hu Y, Guo S, Tan L, Zhan Y, Yang L, Liu W, Wang N, Li Y, Zhang Y, Liu C, Yang Y, Adelstein RS, Wang A. Identification and characterization of MYH9 locus for high efficient gene knock-in and stable expression in mouse embryonic stem cells. PLoS One 2018; 13:e0192641. [PMID: 29438440 PMCID: PMC5811019 DOI: 10.1371/journal.pone.0192641] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Accepted: 01/26/2018] [Indexed: 01/22/2023] Open
Abstract
Targeted integration of exogenous genes into so-called safe harbors/friend sites, offers the advantages of expressing normal levels of target genes and preventing potentially adverse effects on endogenous genes. However, the ideal genomic loci for this purpose remain limited. Additionally, due to the inherent and unresolved issues with the current genome editing tools, traditional embryonic stem (ES) cell-based targeted transgenesis technology is still preferred in practical applications. Here, we report that a high and repeatable homologous recombination (HR) frequency (>95%) is achieved when an approximate 6kb DNA sequence flanking the MYH9 gene exon 2 site is used to create the homology arms for the knockout/knock-in of diverse nonmuscle myosin II (NM II) isoforms in mouse ES cells. The easily obtained ES clones greatly facilitated the generation of multiple NM II genetic replacement mouse models, as characterized previously. Further investigation demonstrated that though the targeted integration site for exogenous genes is shifted to MYH9 intron 2 (about 500bp downstream exon 2), the high HR efficiency and the endogenous MYH9 gene integrity are not only preserved, but the expected expression of the inserted gene(s) is observed in a pre-designed set of experiments conducted in mouse ES cells. Importantly, we confirmed that the expression and normal function of the endogenous MYH9 gene is not affected by the insertion of the exogenous gene in these cases. Therefore, these findings suggest that like the commonly used ROSA26 site, the MYH9 gene locus may be considered a new safe harbor for high-efficiency targeted transgenesis and for biomedical applications.
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Affiliation(s)
- Tanbin Liu
- Lab of Animal Models and Functional Genomics (LAMFG), The Key Laboratory of Animal Vaccine & Protein Engineering, College of Veterinary Medicine, Hunan Agricultural University (HUNAU), Changsha, Hunan, China
| | - Yi Hu
- Lab of Animal Models and Functional Genomics (LAMFG), The Key Laboratory of Animal Vaccine & Protein Engineering, College of Veterinary Medicine, Hunan Agricultural University (HUNAU), Changsha, Hunan, China
| | - Shiyin Guo
- College of Food Science and Technology, HUNAU, Changsha, Hunan, China
| | - Lei Tan
- Lab of Animal Models and Functional Genomics (LAMFG), The Key Laboratory of Animal Vaccine & Protein Engineering, College of Veterinary Medicine, Hunan Agricultural University (HUNAU), Changsha, Hunan, China
| | - Yang Zhan
- Lab of Functional Proteomics (LFP), The Key Laboratory of Animal Vaccine & Protein Engineering, College of Veterinary Medicine, HUNAU, Changsha, Hunan, China
| | - Lingchen Yang
- Lab of Animal Models and Functional Genomics (LAMFG), The Key Laboratory of Animal Vaccine & Protein Engineering, College of Veterinary Medicine, Hunan Agricultural University (HUNAU), Changsha, Hunan, China
| | - Wei Liu
- Lab of Animal Models and Functional Genomics (LAMFG), The Key Laboratory of Animal Vaccine & Protein Engineering, College of Veterinary Medicine, Hunan Agricultural University (HUNAU), Changsha, Hunan, China
| | - Naidong Wang
- Lab of Functional Proteomics (LFP), The Key Laboratory of Animal Vaccine & Protein Engineering, College of Veterinary Medicine, HUNAU, Changsha, Hunan, China
| | - Yalan Li
- Lab of Animal Models and Functional Genomics (LAMFG), The Key Laboratory of Animal Vaccine & Protein Engineering, College of Veterinary Medicine, Hunan Agricultural University (HUNAU), Changsha, Hunan, China
| | - Yingfan Zhang
- Lab of Molecular Cardiology (LMC), National Heart, Lung, and Blood Institute (NHLBI)/National Institutes of Health (NIH), Bethesda, MD, United States of America
| | - Chengyu Liu
- Transgenic Core, NHLBI/ NIH, Bethesda, MD, United States of America
| | - Yi Yang
- Lab of Functional Proteomics (LFP), The Key Laboratory of Animal Vaccine & Protein Engineering, College of Veterinary Medicine, HUNAU, Changsha, Hunan, China
| | - Robert S. Adelstein
- Lab of Molecular Cardiology (LMC), National Heart, Lung, and Blood Institute (NHLBI)/National Institutes of Health (NIH), Bethesda, MD, United States of America
| | - Aibing Wang
- Lab of Animal Models and Functional Genomics (LAMFG), The Key Laboratory of Animal Vaccine & Protein Engineering, College of Veterinary Medicine, Hunan Agricultural University (HUNAU), Changsha, Hunan, China
- Lab of Molecular Cardiology (LMC), National Heart, Lung, and Blood Institute (NHLBI)/National Institutes of Health (NIH), Bethesda, MD, United States of America
- * E-mail:
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Zhang L, Bai K, Zhang J, Xu W, Huang Q, Wang T. Dietary effects of Bacillus subtilis fmbj on the antioxidant capacity of broilers at an early age. Poult Sci 2017; 96:3564-3573. [DOI: 10.3382/ps/pex172] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 06/12/2017] [Indexed: 12/16/2022] Open
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Molecular Age-Related Changes in the Anterior Segment of the Eye. J Ophthalmol 2017; 2017:1295132. [PMID: 29147580 PMCID: PMC5632897 DOI: 10.1155/2017/1295132] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2017] [Revised: 07/09/2017] [Accepted: 08/30/2017] [Indexed: 12/11/2022] Open
Abstract
Purpose To examine the current knowledge about the age-related processes in the anterior segment of the eye at a biological, clinical, and molecular level. Methods We reviewed the available published literature that addresses the aging process of the anterior segment of the eye and its associated molecular and physiological events. We performed a search on PubMed, CINAHL, and Embase using the MeSH terms “eye,” “anterior segment,” and “age.” We generated searches to account for synonyms of these keywords and MESH headings as follows: (1) “Eye” AND “ageing process” OR “anterior segment ageing” and (2) “Anterior segment” AND “ageing process” OR “anterior segment” AND “molecular changes” AND “age.” Results. Among the principal causes of age-dependent alterations in the anterior segment of the eye, we found the mutation of the TGF-β gene and loss of autophagy in addition to oxidative stress, which contributes to the pathogenesis of degenerative diseases. Conclusions In this review, we summarize the current knowledge regarding some of the molecular mechanisms related to aging in the anterior segment of the eye. We also introduce and propose potential roles of autophagy, an important mechanism responsible for maintaining homeostasis and proteostasis under stress conditions in the anterior segment during aging.
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Zhong HH, Hu SJ, Yu B, Jiang SS, Zhang J, Luo D, Yang MW, Su WY, Shao YL, Deng HL, Hong FF, Yang SL. Apoptosis in the aging liver. Oncotarget 2017; 8:102640-102652. [PMID: 29254277 PMCID: PMC5731987 DOI: 10.18632/oncotarget.21123] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Accepted: 08/15/2017] [Indexed: 12/11/2022] Open
Abstract
Various changes in the liver during aging can reduce hepatic function and promote liver injury. Aging is associated with high morbidity and a poor prognosis in patients with various liver diseases, including nonalcoholic fatty liver disease, hepatitis C and liver cancer, as well as with surgeries such as partial hepatectomy and liver transplantation. In addition, apoptosis increases with liver aging. Because apoptosis is involved in regeneration, fibrosis and cancer prevention during liver aging, and restoration of the appropriate level of apoptosis can alleviate the adverse effects of liver aging, it is important to understand the mechanisms underlying this process. Herein, we elaborate on the causes of apoptosis during liver aging, with a focus on oxidative stress, genomic instability, lipotoxicity, endoplasmic reticulum stress, dysregulation of nutrient sensing, and liver stem/progenitor cell activity.
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Affiliation(s)
- Hua-Hua Zhong
- Department of Physiology, College of Medicine, Nanchang University, Nanchang 330006, China
| | - Shao-Jie Hu
- Department of Physiology, College of Medicine, Nanchang University, Nanchang 330006, China
| | - Bo Yu
- Department of Physiology, College of Medicine, Nanchang University, Nanchang 330006, China
| | - Sha-Sha Jiang
- Department of Physiology, College of Medicine, Nanchang University, Nanchang 330006, China
| | - Jin Zhang
- Department of Physiology, College of Medicine, Nanchang University, Nanchang 330006, China
| | - Dan Luo
- Department of Physiology, College of Medicine, Nanchang University, Nanchang 330006, China
| | - Mei-Wen Yang
- Department of Physiology, College of Medicine, Nanchang University, Nanchang 330006, China
| | - Wan-Ying Su
- Department of Physiology, College of Medicine, Nanchang University, Nanchang 330006, China
| | - Ya-Lan Shao
- Department of Physiology, College of Medicine, Nanchang University, Nanchang 330006, China
| | - Hao-Lin Deng
- Department of Physiology, College of Medicine, Nanchang University, Nanchang 330006, China
| | - Fen-Fang Hong
- Department of Experimental Teaching Center, Nanchang University, Nanchang 330031, China
| | - Shu-Long Yang
- Department of Physiology, College of Medicine, Nanchang University, Nanchang 330006, China
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Abstract
The health of an organism is orchestrated by a multitude of molecular and biochemical networks responsible for ensuring homeostasis within cells and tissues. However, upon aging, a progressive failure in the maintenance of this homeostatic balance occurs in response to a variety of endogenous and environmental stresses, allowing the accumulation of damage, the physiological decline of individual tissues, and susceptibility to diseases. What are the molecular and cellular signaling events that control the aging process and how can this knowledge help design therapeutic strategies to combat age-associated diseases? Here we provide a comprehensive overview of the evolutionarily conserved biological processes that alter the rate of aging and discuss their link to disease prevention and the extension of healthy life span.
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Affiliation(s)
- Celine E Riera
- Department of Molecular and Cell Biology, University of California, Berkeley, California 94720; .,Howard Hughes Medical Institute, Chevy Chase, Maryland 20815.,Glenn Center for Research on Aging, University of California, Berkeley, California 94720
| | - Carsten Merkwirth
- Department of Molecular and Cell Biology, University of California, Berkeley, California 94720; .,Howard Hughes Medical Institute, Chevy Chase, Maryland 20815.,Glenn Center for Research on Aging, University of California, Berkeley, California 94720
| | - C Daniel De Magalhaes Filho
- Howard Hughes Medical Institute, Chevy Chase, Maryland 20815.,The Salk Institute for Biological Studies, La Jolla, California 92037
| | - Andrew Dillin
- Department of Molecular and Cell Biology, University of California, Berkeley, California 94720; .,Howard Hughes Medical Institute, Chevy Chase, Maryland 20815.,Glenn Center for Research on Aging, University of California, Berkeley, California 94720
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Babizhayev MA. Generation of reactive oxygen species in the anterior eye segment. Synergistic codrugs of N-acetylcarnosine lubricant eye drops and mitochondria-targeted antioxidant act as a powerful therapeutic platform for the treatment of cataracts and primary open-angle glaucoma. BBA CLINICAL 2016; 6:49-68. [PMID: 27413694 PMCID: PMC4925929 DOI: 10.1016/j.bbacli.2016.04.004] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Revised: 04/05/2016] [Accepted: 04/11/2016] [Indexed: 12/13/2022]
Abstract
Senile cataract is a clouding of the lens in the aging eye leading to a decrease in vision. Symptoms may include faded colors, blurry vision, halos around light, trouble with bright lights, and trouble seeing at night. This may result in trouble driving, reading, or recognizing faces. Cataracts are the cause of half of blindness and 33% of visual impairment worldwide. Cataracts result from the deposition of aggregated proteins in the eye lens and lens fiber cells plasma membrane damage which causes clouding of the lens, light scattering, and obstruction of vision. ROS induced damage in the lens cell may consist of oxidation of proteins, DNA damage and/or lipid peroxidation, all of which have been implicated in cataractogenesis. The inner eye pressure (also called intraocular pressure or IOP) rises because the correct amount of fluid can't drain out of the eye. With primary open-angle glaucoma, the entrances to the drainage canals are clear and should be working correctly. The clogging problem occurs further inside the drainage canals, similar to a clogged pipe below the drain in a sink. The excessive oxidative damage is a major factor of the ocular diseases because the mitochondrial respiratory chain in mitochondria of the vital cells is a significant source of the damaging reactive oxygen species superoxide and hydrogen peroxide. However, despite the clinical importance of mitochondrial oxidative damage, antioxidants have been of limited therapeutic success. This may be because the antioxidants are not selectively taken up by mitochondria, but instead are dispersed throughout the body, ocular tissues and fluids' moieties. This work is an attempt to integrate how mitochondrial reactive oxygen species (ROS) are altered in the aging eye, along with those protective and repair therapeutic systems believed to regulate ROS levels in ocular tissues and how damage to these systems contributes to age-onset eye disease and cataract formation. Mitochondria-targeted antioxidants might be used to effectively prevent ROS-induced oxidation of lipids and proteins in the inner mitochondrial membrane in vivo. The authors developed and patented the new ophthalmic compositions including N-acetylcarnosine acting as a prodrug of naturally targeted to mitochondria l-carnosine endowed with pluripotent antioxidant activities, combined with mitochondria-targeted rechargeable antioxidant (either MitoVit E, Mito Q or SkQs) as a potent medicine to treat ocular diseases. Such specificity is explained by the fact that developed compositions might be used to effectively prevent ROS-induced oxidation of lipids and proteins in the inner mitochondrial membrane in vivo and outside mitochondria in the cellular and tissue structures of the lens and eye compartments. Mitochondrial targeting of compounds with universal types of antioxidant activity represents a promising approach for treating a number of ROS-related ocular diseases of the aging eye and can be implicated in the management of cataracts and primary open-angle glaucoma.
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Affiliation(s)
- Mark A Babizhayev
- Innovative Vision Products, Inc., 3511 Silverside Road, Suite 105, County of New Castle, DE 19810, USA
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Mitochondrial Redox Signaling and Tumor Progression. Cancers (Basel) 2016; 8:cancers8040040. [PMID: 27023612 PMCID: PMC4846849 DOI: 10.3390/cancers8040040] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2015] [Revised: 02/21/2016] [Accepted: 03/07/2016] [Indexed: 01/10/2023] Open
Abstract
Cancer cell can reprogram their energy production by switching mitochondrial oxidative phosphorylation to glycolysis. However, mitochondria play multiple roles in cancer cells, including redox regulation, reactive oxygen species (ROS) generation, and apoptotic signaling. Moreover, these mitochondrial roles are integrated via multiple interconnected metabolic and redox sensitive pathways. Interestingly, mitochondrial redox proteins biphasically regulate tumor progression depending on cellular ROS levels. Low level of ROS functions as signaling messengers promoting cancer cell proliferation and cancer invasion. However, anti-cancer drug-initiated stress signaling could induce excessive ROS, which is detrimental to cancer cells. Mitochondrial redox proteins could scavenger basal ROS and function as “tumor suppressors” or prevent excessive ROS to act as “tumor promoter”. Paradoxically, excessive ROS often also induce DNA mutations and/or promotes tumor metastasis at various stages of cancer progression. Targeting redox-sensitive pathways and transcriptional factors in the appropriate context offers great promise for cancer prevention and therapy. However, the therapeutics should be cancer-type and stage-dependent.
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Speakman JR, Blount JD, Bronikowski AM, Buffenstein R, Isaksson C, Kirkwood TBL, Monaghan P, Ozanne SE, Beaulieu M, Briga M, Carr SK, Christensen LL, Cochemé HM, Cram DL, Dantzer B, Harper JM, Jurk D, King A, Noguera JC, Salin K, Sild E, Simons MJP, Smith S, Stier A, Tobler M, Vitikainen E, Peaker M, Selman C. Oxidative stress and life histories: unresolved issues and current needs. Ecol Evol 2015; 5:5745-57. [PMID: 26811750 PMCID: PMC4717350 DOI: 10.1002/ece3.1790] [Citation(s) in RCA: 150] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Accepted: 09/20/2015] [Indexed: 12/12/2022] Open
Abstract
Life‐history theory concerns the trade‐offs that mold the patterns of investment by animals between reproduction, growth, and survival. It is widely recognized that physiology plays a role in the mediation of life‐history trade‐offs, but the details remain obscure. As life‐history theory concerns aspects of investment in the soma that influence survival, understanding the physiological basis of life histories is related, but not identical, to understanding the process of aging. One idea from the field of aging that has gained considerable traction in the area of life histories is that life‐history trade‐offs may be mediated by free radical production and oxidative stress. We outline here developments in this field and summarize a number of important unresolved issues that may guide future research efforts. The issues are as follows. First, different tissues and macromolecular targets of oxidative stress respond differently during reproduction. The functional significance of these changes, however, remains uncertain. Consequently there is a need for studies that link oxidative stress measurements to functional outcomes, such as survival. Second, measurements of oxidative stress are often highly invasive or terminal. Terminal studies of oxidative stress in wild animals, where detailed life‐history information is available, cannot generally be performed without compromising the aims of the studies that generated the life‐history data. There is a need therefore for novel non‐invasive measurements of multi‐tissue oxidative stress. Third, laboratory studies provide unrivaled opportunities for experimental manipulation but may fail to expose the physiology underpinning life‐history effects, because of the benign laboratory environment. Fourth, the idea that oxidative stress might underlie life‐history trade‐offs does not make specific enough predictions that are amenable to testing. Moreover, there is a paucity of good alternative theoretical models on which contrasting predictions might be based. Fifth, there is an enormous diversity of life‐history variation to test the idea that oxidative stress may be a key mediator. So far we have only scratched the surface. Broadening the scope may reveal new strategies linked to the processes of oxidative damage and repair. Finally, understanding the trade‐offs in life histories and understanding the process of aging are related but not identical questions. Scientists inhabiting these two spheres of activity seldom collide, yet they have much to learn from each other.
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Affiliation(s)
- John R Speakman
- Institute of Biological and Environmental Sciences University of Aberdeen Tillydrone Avenue Aberdeen AB24 2TZ UK; State Key Laboratory of Molecular Developmental Biology Institute of Genetics and Developmental Biology Chinese Academy of Sciences Beijing China
| | - Jonathan D Blount
- Centre for Ecology and Conservation University of Exeter Penryn Campus Cornwall TR10 9FE UK
| | - Anne M Bronikowski
- Department of Ecology, Evolution and Organismal Biology Iowa State University 251 Bessey Hall Ames Iowa 50011
| | - Rochelle Buffenstein
- Physiology, Barshop Institute for Aging and Longevity Research UTHSCSA 15355 Lambda Drive San Antonio Texas 78245
| | - Caroline Isaksson
- Department of Biology Lund University Solvegatan 37 Lund 223 62 Sweden
| | - Tom B L Kirkwood
- The Newcastle University Institute for Ageing Institute for Cell & Molecular Biosciences Campus for Ageing and Vitality Newcastle upon Tyne NE4 5PL UK
| | - Pat Monaghan
- Institute of Biodiversity, Animal Health and Comparative Medicine University of Glasgow Graham Kerr Building Glasgow G12 8QQ UK
| | - Susan E Ozanne
- University of Cambridge Metabolic Research Laboratories and MRC Metabolic Diseases Unit, Level 4 Wellcome Trust-MRC Institute of Metabolic Science Addenbrooke's Hospital Cambridge CB2 0QQ UK
| | - Michaël Beaulieu
- Zoological Institute and Museum University of Greifswald Johann-Sebastian Bach Str. 11/12 Greifswald 17489 Germany
| | - Michael Briga
- Behavioral Biology University of Groningen Nijenborgh 7 Groningen 9747 AG The Netherlands
| | - Sarah K Carr
- University of Cambridge Metabolic Research Laboratories and MRC Metabolic Diseases Unit, Level 4 Wellcome Trust-MRC Institute of Metabolic Science Addenbrooke's Hospital Cambridge CB2 0QQ UK
| | - Louise L Christensen
- Institute of Biological and Environmental Sciences University of Aberdeen Tillydrone Avenue Aberdeen AB24 2TZ UK
| | - Helena M Cochemé
- MRC Clinical Sciences Centre Imperial College London Hammersmith Hospital Campus Du Cane Road London W12 0NN UK
| | - Dominic L Cram
- Department of Zoology University of Cambridge Cambridge CB2 3EJ UK
| | - Ben Dantzer
- Department of Psychology University of Michigan Ann Arbor Michigan 48109
| | - Jim M Harper
- Department of Biological Sciences Sam Houston State University 1900 Avenue I LDB 100B Huntsville Texas 77341
| | - Diana Jurk
- The Newcastle University Institute for Ageing Institute for Cell & Molecular Biosciences Campus for Ageing and Vitality Newcastle upon Tyne NE4 5PL UK
| | - Annette King
- The Newcastle University Institute for Ageing Institute for Cell & Molecular Biosciences Campus for Ageing and Vitality Newcastle upon Tyne NE4 5PL UK
| | - Jose C Noguera
- Institute of Biodiversity, Animal Health and Comparative Medicine University of Glasgow Graham Kerr Building Glasgow G12 8QQ UK
| | - Karine Salin
- Institute of Biodiversity, Animal Health and Comparative Medicine University of Glasgow Graham Kerr Building Glasgow G12 8QQ UK
| | - Elin Sild
- Department of Biology Lund University Solvegatan 37 Lund 223 62 Sweden
| | - Mirre J P Simons
- Department of Animal and Plant Sciences University of Sheffield Alfred Denny Building, Western Bank Sheffield S10 2TN UK
| | - Shona Smith
- Institute of Biodiversity, Animal Health and Comparative Medicine University of Glasgow Graham Kerr Building Glasgow G12 8QQ UK
| | - Antoine Stier
- Department Ecology, Physiology et Ethology University of Strasbourg - IPHC (UMR7178) 23, rue Becquerel Strasbourg 67087 France
| | - Michael Tobler
- Department of Biology Lund University Solvegatan 37 Lund 223 62 Sweden
| | - Emma Vitikainen
- Centre for Ecology and Conservation University of Exeter Penryn Campus Cornwall TR10 9FE UK
| | | | - Colin Selman
- Institute of Biodiversity, Animal Health and Comparative Medicine University of Glasgow Graham Kerr Building Glasgow G12 8QQ UK
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Thioredoxin-2 Modulates Neuronal Programmed Cell Death in the Embryonic Chick Spinal Cord in Basal and Target-Deprived Conditions. PLoS One 2015; 10:e0142280. [PMID: 26540198 PMCID: PMC4634972 DOI: 10.1371/journal.pone.0142280] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Accepted: 10/20/2015] [Indexed: 01/09/2023] Open
Abstract
Thioredoxin-2 (Trx2) is a mitochondrial protein using a dithiol active site to reduce protein disulfides. In addition to the cytoprotective function of this enzyme, several studies have highlighted the implication of Trx2 in cellular signaling events. In particular, growing evidence points to such roles of redox enzymes in developmental processes taking place in the central nervous system. Here, we investigate the potential implication of Trx2 in embryonic development of chick spinal cord. To this end, we first studied the distribution of the enzyme in this tissue and report strong expression of Trx2 in chick embryo post-mitotic neurons at E4.5 and in motor neurons at E6.5. Using in ovo electroporation, we go on to highlight a cytoprotective effect of Trx2 on the programmed cell death (PCD) of neurons during spinal cord development and in a novel cultured spinal cord explant model. These findings suggest an implication of Trx2 in the modulation of developmental PCD of neurons during embryonic development of the spinal cord, possibly through redox regulation mechanisms.
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Liu Y, Yang Y, Dong H, Cutler RG, Strong R, Mattson MP. Thidoredxin-2 overexpression fails to rescue chronic high calorie diet induced hippocampal dysfunction. Exp Neurol 2015; 275 Pt 1:126-32. [PMID: 26476179 DOI: 10.1016/j.expneurol.2015.10.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2015] [Revised: 09/03/2015] [Accepted: 10/11/2015] [Indexed: 11/26/2022]
Abstract
A high calorie diet (HCD) can impair hippocampal synaptic plasticity and cognitive function in animal models. Mitochondrial thioredoxin 2 (TRX-2) is critical for maintaining intracellular redox status, but whether it can protect against HCD-induced impairment of synaptic plasticity is unknown. We found that levels of TRX-2 are reduced in the hippocampus of wild type mice maintained for 8 months on a HCD, and that the mice on the HCD exhibit impaired hippocampal synaptic plasticity (long-term potentiation at CA1 synapses) and cognitive function (novel object recognition). Transgenic mice overexpressing human TRX-2 (hTRX-2) exhibit increased resistance to diquat-induced oxidative stress in peripheral tissues. However, neither the HCD nor hTRX-2 overexpression affected levels of lipid peroxidation products (F2 isoprostanes) in the hippocampus, and hTRX-2 transgenic mice were not protected against the adverse effects of the HCD on hippocampal synaptic plasticity and cognitive function. Our findings indicate that TRX-2 overexpression does not mitigate adverse effects of a HCD on synaptic plasticity, and also suggest that oxidative stress may not be a pivotal factor in the impairment of synaptic plasticity and cognitive function caused by HCDs.
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Affiliation(s)
- Yong Liu
- Laboratory of Neurosciences, National Institute on Aging Intramural Research Program, Baltimore, MD 21224, United States
| | - Ying Yang
- Laboratory of Neurosciences, National Institute on Aging Intramural Research Program, Baltimore, MD 21224, United States; Department of Neurology, Zhongnan Hospital, Wuhan University, Wuhan, China
| | - Hui Dong
- Laboratory of Neurosciences, National Institute on Aging Intramural Research Program, Baltimore, MD 21224, United States
| | - Roy G Cutler
- Laboratory of Neurosciences, National Institute on Aging Intramural Research Program, Baltimore, MD 21224, United States
| | - Randy Strong
- Barshop Institute for Longevity and Aging Studies, University of Texas Health Science Center, San Antonio TX 78245, United States
| | - Mark P Mattson
- Laboratory of Neurosciences, National Institute on Aging Intramural Research Program, Baltimore, MD 21224, United States; Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD 21205, United States.
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Kiermayer C, Northrup E, Schrewe A, Walch A, de Angelis MH, Schoensiegel F, Zischka H, Prehn C, Adamski J, Bekeredjian R, Ivandic B, Kupatt C, Brielmeier M. Heart-Specific Knockout of the Mitochondrial Thioredoxin Reductase (Txnrd2) Induces Metabolic and Contractile Dysfunction in the Aging Myocardium. J Am Heart Assoc 2015; 4:e002153. [PMID: 26199228 PMCID: PMC4608093 DOI: 10.1161/jaha.115.002153] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Accepted: 05/19/2015] [Indexed: 01/19/2023]
Abstract
BACKGROUND Ubiquitous deletion of thioredoxin reductase 2 (Txnrd2) in mice is embryonically lethal and associated with abnormal heart development, while constitutive, heart-specific Txnrd2 inactivation leads to dilated cardiomyopathy and perinatal death. The significance of Txnrd2 in aging cardiomyocytes, however, has not yet been examined. METHODS AND RESULTS The tamoxifen-inducible heart-specific αMHC-MerCreMer transgene was used to inactivate loxP-flanked Txnrd2 alleles in adult mice. Hearts and isolated mitochondria from aged knockout mice were morphologically and functionally analyzed. Echocardiography revealed a significant increase in left ventricular end-systolic diameters in knockouts. Fractional shortening and ejection fraction were decreased compared with controls. Ultrastructural analysis of cardiomyocytes of aged mice showed mitochondrial degeneration and accumulation of autophagic bodies. A dysregulated autophagic activity was supported by higher levels of lysosome-associated membrane protein 1 (LAMP1), microtubule-associated protein 1A/1B-light chain 3-I (LC3-I), and p62 in knockout hearts. Isolated Txnrd2-deficient mitochondria used less oxygen and tended to produce more reactive oxygen species. Chronic hypoxia inducible factor 1, α subunit stabilization and altered transcriptional and metabolic signatures indicated that energy metabolism is deregulated. CONCLUSIONS These results imply a novel role of Txnrd2 in sustaining heart function during aging and suggest that Txnrd2 may be a modifier of heart failure.
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MESH Headings
- Age Factors
- Animals
- Autophagy
- Blood Pressure
- Disease Models, Animal
- Energy Metabolism
- Gene Expression Profiling/methods
- Gene Expression Regulation
- Genetic Predisposition to Disease
- Heart Failure/enzymology
- Heart Failure/genetics
- Heart Failure/pathology
- Heart Failure/physiopathology
- Hypoxia-Inducible Factor 1, alpha Subunit/genetics
- Hypoxia-Inducible Factor 1, alpha Subunit/metabolism
- Lysosomal Membrane Proteins/genetics
- Lysosomal Membrane Proteins/metabolism
- Metabolomics/methods
- Mice, Knockout
- Microtubule-Associated Proteins/genetics
- Microtubule-Associated Proteins/metabolism
- Mitochondria, Heart/enzymology
- Mitochondria, Heart/ultrastructure
- Myocardial Contraction
- Myocytes, Cardiac/enzymology
- Myocytes, Cardiac/ultrastructure
- Oxidative Stress
- Phenotype
- RNA, Messenger/metabolism
- Reactive Oxygen Species/metabolism
- Stroke Volume
- Thioredoxin Reductase 2/deficiency
- Thioredoxin Reductase 2/genetics
- Time Factors
- Ventricular Dysfunction, Left/enzymology
- Ventricular Dysfunction, Left/genetics
- Ventricular Dysfunction, Left/physiopathology
- Ventricular Function, Left
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Affiliation(s)
- Claudia Kiermayer
- Research Unit Comparative Medicine, Helmholtz Zentrum München, German Research Center for Environmental HealthNeuherberg, Germany
| | - Emily Northrup
- Research Unit Comparative Medicine, Helmholtz Zentrum München, German Research Center for Environmental HealthNeuherberg, Germany
| | - Anja Schrewe
- Institute of Experimental Genetics, Helmholtz Zentrum München, German Research Center for Environmental HealthNeuherberg, Germany
| | - Axel Walch
- Reserach Unit Analytical Pathology, Helmholtz Zentrum München, German Research Center for Environmental HealthNeuherberg, Germany
| | - Martin Hrabe de Angelis
- Institute of Experimental Genetics, Helmholtz Zentrum München, German Research Center for Environmental HealthNeuherberg, Germany
- Chair of Experimental Genetics, Technische Universität MünchenMunich, Germany
| | - Frank Schoensiegel
- Department of Internal Medicine III, University of HeidelbergHeidelberg, Germany
| | - Hans Zischka
- Institute of molecular Toxicology and Pharmacology, Helmholtz Zentrum München, German Research Center for Environmental HealthNeuherberg, Germany
| | - Cornelia Prehn
- Institute of Experimental Genetics, Genome Analysis Center, Helmholtz Zentrum München, German Research Center for Environmental HealthNeuherberg, Germany
| | - Jerzy Adamski
- Institute of Experimental Genetics, Genome Analysis Center, Helmholtz Zentrum München, German Research Center for Environmental HealthNeuherberg, Germany
- Chair of Experimental Genetics, Technische Universität MünchenMunich, Germany
| | - Raffi Bekeredjian
- Department of Internal Medicine III, University of HeidelbergHeidelberg, Germany
| | - Boris Ivandic
- Department of Internal Medicine III, University of HeidelbergHeidelberg, Germany
| | - Christian Kupatt
- I. Medizinische Klinik und Poliklinik, Klinikum Rechts der Isar, TU MunichMunich, Germany
- German Center for Cardiovascular Research (DZHK) partner site Munich Heart AllianceMunich, Germany
| | - Markus Brielmeier
- Research Unit Comparative Medicine, Helmholtz Zentrum München, German Research Center for Environmental HealthNeuherberg, Germany
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Gruber J, Chen CB, Fong S, Ng LF, Teo E, Halliwell B. Caenorhabditis elegans: What We Can and Cannot Learn from Aging Worms. Antioxid Redox Signal 2015; 23:256-79. [PMID: 25544992 DOI: 10.1089/ars.2014.6210] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
SIGNIFICANCE The nematode Caenorhabditis elegans is a widely used model organism for research into aging. However, nematodes diverged from other animals between 600 and 1300 million years ago. Beyond the intuitive impression that some aspects of aging appear to be universal, is there evidence that insights into the aging process of nematodes may be applicable to humans? RECENT ADVANCES There have been a number of results in nematodes that appear to contradict long-held beliefs about mechanisms and causes of aging. For example, ablation of several key antioxidant systems has often failed to result in lifespan shortening in C. elegans. CRITICAL ISSUES While it is clear that some central signaling pathways controlling lifespan are broadly conserved across large evolutionary distances, it is less clear to what extent downstream molecular mechanisms of aging are conserved. In this review we discuss the biology of C. elegans and mammals in the context of aging and age-dependent diseases. We consider evidence from studies that attempt to investigate basic, possibly conserved mechanisms of aging especially in the context of the free radical theory of aging. Practical points, such as the need for blinding of lifespan studies and for appropriate biomarkers, are also considered. FUTURE DIRECTIONS As data on the aging process(es) in different organisms increase, it is becoming increasingly clear that there are both conserved (public) and private aspects to aging. It is important to explore the dividing lines between these two aspects and to be aware of the large gray areas in-between.
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Affiliation(s)
- Jan Gruber
- 1 Department of Biochemistry, National University of Singapore , Singapore, Singapore .,2 Yale-NUS College , Singapore, Singapore
| | - Ce-Belle Chen
- 3 Department of Physics, National University of Singapore , Singapore, Singapore
| | - Sheng Fong
- 4 Duke-NUS Graduate Medical School , Singapore, Singapore
| | - Li Fang Ng
- 1 Department of Biochemistry, National University of Singapore , Singapore, Singapore
| | - Emelyne Teo
- 1 Department of Biochemistry, National University of Singapore , Singapore, Singapore
| | - Barry Halliwell
- 1 Department of Biochemistry, National University of Singapore , Singapore, Singapore
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46
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Sun HY, Hu YJ, Zhao XY, Zhong Y, Zeng LL, Chen XB, Yuan J, Wu J, Sun Y, Kong W, Kong WJ. Age-related changes in mitochondrial antioxidant enzyme Trx2 and TXNIP-Trx2-ASK1 signal pathways in the auditory cortex of a mimetic aging rat model: changes to Trx2 in the auditory cortex. FEBS J 2015; 282:2758-74. [PMID: 25996168 DOI: 10.1111/febs.13324] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Revised: 04/10/2015] [Accepted: 05/18/2015] [Indexed: 12/21/2022]
Abstract
Age-associated degeneration in the central auditory system, which is defined as central presbycusis, can impair sound localization and speech perception. Research has shown that oxidative stress plays a central role in the pathological process of central presbycusis. Thioredoxin 2 (Trx2), one member of thioredoxin family, plays a key role in regulating the homeostasis of cellular reactive oxygen species and anti-apoptosis. The purpose of this study was to explore the association between Trx2 and the phenotype of central presbycusis using a mimetic aging animal model induced by long-term exposure to d-galactose (d-Gal). We also explored changes in thioredoxin-interacting protein (TXNIP), apoptosis signal regulating kinase 1 (ASK1) and phosphorylated ASK1 (p-ASK1) expression, as well as the Trx2-TXNIP/Trx2-ASK1 binding complex in the auditory cortex of mimetic aging rats. Our results demonstrate that, compared with control groups, the levels of Trx2 and Trx2-ASK1 binding complex were significantly reduced, whereas TXNIP, ASK1 p-ASK1 expression, and Trx2-TXNIP binding complex were significantly increased in the auditory cortex of the mimetic aging groups. Our results indicated that changes in Trx2 and the TXNIP-Trx2-ASK1 signal pathway may participate in the pathogenesis of central presbycusis.
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Affiliation(s)
- Hai-Ying Sun
- Department of Otorhinolaryngology, Huazhong University of Science and Technology, Wuhan, China
| | - Yu-Juan Hu
- Department of Otorhinolaryngology, Huazhong University of Science and Technology, Wuhan, China
| | - Xue-Yan Zhao
- Department of Otorhinolaryngology, Huazhong University of Science and Technology, Wuhan, China
| | - Yi Zhong
- Department of Otorhinolaryngology, Huazhong University of Science and Technology, Wuhan, China
| | - Ling-Ling Zeng
- Department of Otorhinolaryngology, Huazhong University of Science and Technology, Wuhan, China
| | - Xu-Bo Chen
- Department of Otorhinolaryngology, Huazhong University of Science and Technology, Wuhan, China
| | - Jie Yuan
- Department of Otorhinolaryngology, Huazhong University of Science and Technology, Wuhan, China
| | - Jing Wu
- Department of Otorhinolaryngology, Huazhong University of Science and Technology, Wuhan, China
| | - Yu Sun
- Department of Otorhinolaryngology, Huazhong University of Science and Technology, Wuhan, China
| | - Wen Kong
- Department of Endocrinology, Huazhong University of Science and Technology, Wuhan, China
| | - Wei-Jia Kong
- Department of Otorhinolaryngology, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Neurological Disease, Ministry of Education, Wuhan, China
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Aon MA, Tocchetti CG, Bhatt N, Paolocci N, Cortassa S. Protective mechanisms of mitochondria and heart function in diabetes. Antioxid Redox Signal 2015; 22:1563-86. [PMID: 25674814 PMCID: PMC4449630 DOI: 10.1089/ars.2014.6123] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
SIGNIFICANCE The heart depends on continuous mitochondrial ATP supply and maintained redox balance to properly develop force, particularly under increased workload. During diabetes, however, myocardial energetic-redox balance is perturbed, contributing to the systolic and diastolic dysfunction known as diabetic cardiomyopathy (DC). CRITICAL ISSUES How these energetic and redox alterations intertwine to influence the DC progression is still poorly understood. Excessive bioavailability of both glucose and fatty acids (FAs) play a central role, leading, among other effects, to mitochondrial dysfunction. However, where and how this nutrient excess affects mitochondrial and cytoplasmic energetic/redox crossroads remains to be defined in greater detail. RECENT ADVANCES We review how high glucose alters cellular redox balance and affects mitochondrial DNA. Next, we address how lipid excess, either stored in lipid droplets or utilized by mitochondria, affects performance in diabetic hearts by influencing cardiac energetic and redox assets. Finally, we examine how the reciprocal energetic/redox influence between mitochondrial and cytoplasmic compartments shapes myocardial mechanical activity during the course of DC, focusing especially on the glutathione and thioredoxin systems. FUTURE DIRECTIONS Protecting mitochondria from losing their ability to generate energy, and to control their own reactive oxygen species emission is essential to prevent the onset and/or to slow down DC progression. We highlight mechanisms enforced by the diabetic heart to counteract glucose/FAs surplus-induced damage, such as lipid storage, enhanced mitochondria-lipid droplet interaction, and upregulation of key antioxidant enzymes. Learning more on the nature and location of mechanisms sheltering mitochondrial functions would certainly help in further optimizing therapies for human DC.
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Affiliation(s)
- Miguel A Aon
- Division of Cardiology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Carlo G Tocchetti
- Division of Cardiology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Niraj Bhatt
- Division of Cardiology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Nazareno Paolocci
- Division of Cardiology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Sonia Cortassa
- Division of Cardiology, Johns Hopkins University School of Medicine, Baltimore, Maryland
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48
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Seco-Cervera M, Spis M, García-Giménez JL, Ibañez-Cabellos JS, Velázquez-Ledesma A, Esmorís I, Bañuls S, Pérez-Machado G, Pallardó FV. Oxidative stress and antioxidant response in fibroblasts from Werner and atypical Werner syndromes. Aging (Albany NY) 2015; 6:231-45. [PMID: 24799429 PMCID: PMC4012939 DOI: 10.18632/aging.100649] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Werner Syndrome (WS, ICD-10 E34.8, ORPHA902) and Atypical Werner Syndrome (AWS, ICD-10 E34.8, ORPHA79474) are very rare inherited syndromes characterized by premature aging. While approximately 90% of WS individuals have any of a range of mutations in the WRN gene, there exists a clinical subgroup in which the mutation occurs in the LMNA/C gene in heterozygosity. Although both syndromes exhibit an age-related pleiotropic phenotype, AWS manifests the onset of the disease during childhood, while major symptoms in WS appear between the ages of 20 and 30. To study the molecular mechanisms of progeroid diseases provides a useful insight into the normal aging process. Main changes found were the decrease in Cu/Zn and Mn SOD activities in the three cell lines. In AWS, both mRNA SOD and protein levels were also decreased. Catalase and glutathione peroxidases decrease, mainly in AWS. Glutaredoxin (Grx) and thioredoxin (Trx) protein expression was lower in the three progeroid cell lines. Grx and Trx were subjected to post-transcriptional regulation, because protein expression was reduced although mRNA levels were not greatly affected in WS.
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Affiliation(s)
- Marta Seco-Cervera
- CIBERER. Centro de Investigación Biomédica en Red de Enfermedades Raras, Valencia, Spain
| | | | | | | | | | | | | | | | - Federico V Pallardó
- Department of Physiology, Medicine School, University of Valencia, Valencia. Spain
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49
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The paradoxical role of thioredoxin on oxidative stress and aging. Arch Biochem Biophys 2015; 576:32-8. [PMID: 25726727 DOI: 10.1016/j.abb.2015.02.025] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Revised: 02/17/2015] [Accepted: 02/19/2015] [Indexed: 11/22/2022]
Abstract
In spite of intensive study, there is still controversy about the free radical or oxidative stress theory of aging, particularly in mammals. Our laboratory has conducted the first detailed studies on the role of thioredoxin (Trx) in the cytosol (Trx1) and in mitochondria (Trx2) on oxidative stress and aging using unique mouse models either overexpressing or down-regulating Trx1 or Trx2. The results generated from our lab and others indicate that: (1) oxidative stress and subsequent changes in signaling pathways could have different pathophysiological impacts at different stages of life; (2) changes in redox-sensitive signaling controlled by levels of oxidative stress and redox state could play more important roles in pathophysiology than accumulation of oxidative damage; (3) changes in oxidative stress and redox state in different cellular compartments (cytosol, mitochondria, or nucleus) could play different roles in pathophysiology during aging, and their combined effects show more impact on aging than changes in either oxidative stress or redox state alone; and (4) the roles of oxidative stress and redox state could have different pathophysiological consequences in different organs/tissues/cells or pathophysiological conditions. To critically test the role of oxidative stress on aging and investigate changes in redox-sensitive signaling pathways, further study is required.
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50
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