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Melones-Herrero J, Alcalá S, Ruiz-Cañas L, Benítez-Buelga C, Batres-Ramos S, Calés C, Lorenzo O, Perona R, Quiroga AG, Sainz B, Sánchez-Pérez I. Platinum iodido drugs show potential anti-tumor activity, affecting cancer cell metabolism and inducing ROS and senescence in gastrointestinal cancer cells. Commun Biol 2024; 7:353. [PMID: 38519773 PMCID: PMC10959927 DOI: 10.1038/s42003-024-06052-5] [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: 05/24/2023] [Accepted: 03/14/2024] [Indexed: 03/25/2024] Open
Abstract
Cisplatin-based chemotherapy has associated clinical disadvantages, such as high toxicity and resistance. Thus, the development of new antitumor metallodrugs able to overcome different clinical barriers is a public healthcare priority. Here, we studied the mechanism of action of the isomers trans and cis-[PtI2(isopropylamine)2] (I5 and I6, respectively) against gastrointestinal cancer cells. We demonstrate that I5 and I6 modulate mitochondrial metabolism, decreasing OXPHOS activity and negatively affecting ATP-linked oxygen consumption rate. Consequently, I5 and I6 generated Reactive Oxygen Species (ROS), provoking oxidative damage and eventually the induction of senescence. Thus, herein we propose a loop with three interconnected processes modulated by these iodido agents: (i) mitochondrial dysfunction and metabolic disruptions; (ii) ROS generation and oxidative damage; and (iii) cellular senescence. Functionally, I5 reduces cancer cell clonogenicity and tumor growth in a pancreatic xenograft model without systemic toxicity, highlighting a potential anticancer complex that warrants additional pre-clinical studies.
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Affiliation(s)
- Jorge Melones-Herrero
- Department of Biochemistry. School of Medicine, Universidad Autónoma de Madrid (UAM), Madrid, Spain
- Instituto de Investigaciones Biomédicas "Sols-Morreale" IIBM-CSIC-UAM, Madrid, Spain
- Biomarkers and Personalized Approach to Cancer (BioPAC) Group. Area 3 Cancer -Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain
| | - Sonia Alcalá
- Department of Biochemistry. School of Medicine, Universidad Autónoma de Madrid (UAM), Madrid, Spain
- Instituto de Investigaciones Biomédicas "Sols-Morreale" IIBM-CSIC-UAM, Madrid, Spain
- Biomarkers and Personalized Approach to Cancer (BioPAC) Group. Area 3 Cancer -Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain
| | - Laura Ruiz-Cañas
- Department of Biochemistry. School of Medicine, Universidad Autónoma de Madrid (UAM), Madrid, Spain
- Instituto de Investigaciones Biomédicas "Sols-Morreale" IIBM-CSIC-UAM, Madrid, Spain
- Biomarkers and Personalized Approach to Cancer (BioPAC) Group. Area 3 Cancer -Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain
| | - Carlos Benítez-Buelga
- Instituto de Investigaciones Biomédicas "Sols-Morreale" IIBM-CSIC-UAM, Madrid, Spain
| | - Sandra Batres-Ramos
- Department of Biochemistry. School of Medicine, Universidad Autónoma de Madrid (UAM), Madrid, Spain
- Instituto de Investigaciones Biomédicas "Sols-Morreale" IIBM-CSIC-UAM, Madrid, Spain
- Biomarkers and Personalized Approach to Cancer (BioPAC) Group. Area 3 Cancer -Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain
| | - Carmela Calés
- Department of Biochemistry. School of Medicine, Universidad Autónoma de Madrid (UAM), Madrid, Spain
- Instituto de Investigaciones Biomédicas "Sols-Morreale" IIBM-CSIC-UAM, Madrid, Spain
| | - Oscar Lorenzo
- Laboratory of Diabetes and Vascular Pathology, Instituto de Investigaciones Sanitarias-Fundación Jimenez Díaz, CIBERDEM, UAM, Madrid, Spain
| | - Rosario Perona
- Instituto de Investigaciones Biomédicas "Sols-Morreale" IIBM-CSIC-UAM, Madrid, Spain
- Centro de Investigación Biomédica en Red, Área Rare Diseases, CIBERER, ISCIII, Madrid, Spain
- Instituto de Salud Carlos III, Madrid, Spain
| | - Adoración G Quiroga
- Department of Inorganic Chemistry, School of Sciences, IAdChem, UAM, Madrid, Spain
| | - Bruno Sainz
- Instituto de Investigaciones Biomédicas "Sols-Morreale" IIBM-CSIC-UAM, Madrid, Spain.
- Biomarkers and Personalized Approach to Cancer (BioPAC) Group. Area 3 Cancer -Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain.
- Centro de Investigación Biomédica en Red, Área Cáncer, CIBERONC, ISCIII, Madrid, Spain.
| | - Isabel Sánchez-Pérez
- Department of Biochemistry. School of Medicine, Universidad Autónoma de Madrid (UAM), Madrid, Spain.
- Instituto de Investigaciones Biomédicas "Sols-Morreale" IIBM-CSIC-UAM, Madrid, Spain.
- Biomarkers and Personalized Approach to Cancer (BioPAC) Group. Area 3 Cancer -Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain.
- Centro de Investigación Biomédica en Red, Área Rare Diseases, CIBERER, ISCIII, Madrid, Spain.
- Unidad Asociada de Biomedicina UCLM-CSIC, Madrid, Spain.
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2
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Thosar SA, Barnes RP, Detwiler A, Bhargava R, Wondisford A, O'Sullivan RJ, Opresko PL. Oxidative guanine base damage plays a dual role in regulating productive ALT-associated homology-directed repair. Cell Rep 2024; 43:113656. [PMID: 38194346 PMCID: PMC10851105 DOI: 10.1016/j.celrep.2023.113656] [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: 07/28/2023] [Revised: 11/06/2023] [Accepted: 12/20/2023] [Indexed: 01/10/2024] Open
Abstract
Cancer cells maintain telomeres by upregulating telomerase or alternative lengthening of telomeres (ALT) via homology-directed repair at telomeric DNA breaks. 8-Oxoguanine (8oxoG) is a highly prevalent endogenous DNA lesion in telomeric sequences, altering telomere structure and telomerase activity, but its impact on ALT is unclear. Here, we demonstrate that targeted 8oxoG formation at telomeres stimulates ALT activity and homologous recombination specifically in ALT cancer cells. Mechanistically, an acute 8oxoG induction increases replication stress, as evidenced by increased telomere fragility and ATR kinase activation at ALT telomeres. Furthermore, ALT cells are more sensitive to chronic telomeric 8oxoG damage than telomerase-positive cancer cells, consistent with increased 8oxoG-induced replication stress. However, telomeric 8oxoG production in G2 phase, when ALT telomere elongation occurs, impairs telomeric DNA synthesis. Our study demonstrates that a common oxidative base lesion has a dual role in regulating ALT depending on when the damage arises in the cell cycle.
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Affiliation(s)
- Sanjana A Thosar
- Department of Environmental and Occupational Health, University of Pittsburgh School of Public Health, Pittsburgh, PA, USA; UPMC Hillman Cancer Center, Pittsburgh, PA, USA
| | - Ryan P Barnes
- Department of Environmental and Occupational Health, University of Pittsburgh School of Public Health, Pittsburgh, PA, USA; UPMC Hillman Cancer Center, Pittsburgh, PA, USA
| | - Ariana Detwiler
- Department of Environmental and Occupational Health, University of Pittsburgh School of Public Health, Pittsburgh, PA, USA; UPMC Hillman Cancer Center, Pittsburgh, PA, USA
| | - Ragini Bhargava
- UPMC Hillman Cancer Center, Pittsburgh, PA, USA; Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Anne Wondisford
- UPMC Hillman Cancer Center, Pittsburgh, PA, USA; Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Roderick J O'Sullivan
- UPMC Hillman Cancer Center, Pittsburgh, PA, USA; Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Patricia L Opresko
- Department of Environmental and Occupational Health, University of Pittsburgh School of Public Health, Pittsburgh, PA, USA; UPMC Hillman Cancer Center, Pittsburgh, PA, USA; Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.
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3
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Rizzo A, Maresca C, D'Angelo C, Porru M, Di Vito S, Salvati E, Sacconi A, Berardinelli F, Sgura A, Kuznetsov S, Potdar S, Hassinen A, Stoppacciaro A, Zizza P, Biroccio A. Drug repositioning strategy for the identification of novel telomere-damaging agents: A role for NAMPT inhibitors. Aging Cell 2023; 22:e13944. [PMID: 37858982 PMCID: PMC10652301 DOI: 10.1111/acel.13944] [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: 01/13/2023] [Revised: 07/13/2023] [Accepted: 07/14/2023] [Indexed: 10/21/2023] Open
Abstract
Drug repositioning strategy represents a valid tool to accelerate the pharmacological development through the identification of new applications for already existing compounds. In this view, we aimed at discovering molecules able to trigger telomere-localized DNA damage and tumor cell death. By applying an automated high-content spinning-disk microscopy, we performed a screening aimed at identifying, on a library of 527 drugs, molecules able to negatively affect the expression of TRF2, a key protein in telomere maintenance. FK866, resulting from the screening as the best candidate hit, was then validated at biochemical and molecular levels and the mechanism underlying its activity in telomere deprotection was elucidated both in vitro and in vivo. The results of this study allow us to discover a novel role of FK866 in promoting, through the production of reactive oxygen species, telomere loss and deprotection, two events leading to an accumulation of DNA damage and tumor cell death. The ability of FK866 to induce telomere damage and apoptosis was also demonstrated in advanced preclinical models evidencing the antitumoral activity of FK866 in triple-negative breast cancer-a particularly aggressive breast cancer subtype still orphan of targeted therapies and characterized by high expression levels of both NAMPT and TRF2. Overall, our findings pave the way to the development of novel anticancer strategies to counteract triple-negative breast cancer, based on the use of telomere deprotecting agents, including NAMPT inhibitors, that would rapidly progress from bench to bedside.
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Affiliation(s)
- Angela Rizzo
- IRCCS—Regina Elena National Cancer InstituteTranslational Oncology Research UnitRomeItaly
| | - Carmen Maresca
- IRCCS—Regina Elena National Cancer InstituteTranslational Oncology Research UnitRomeItaly
| | - Carmen D'Angelo
- IRCCS—Regina Elena National Cancer InstituteTranslational Oncology Research UnitRomeItaly
| | - Manuela Porru
- IRCCS—Regina Elena National Cancer InstituteTranslational Oncology Research UnitRomeItaly
| | - Serena Di Vito
- IRCCS—Regina Elena National Cancer InstituteTranslational Oncology Research UnitRomeItaly
| | - Erica Salvati
- Institute of Molecular Biology and PathologyNational Research CouncilRomeItaly
| | - Andrea Sacconi
- IRCCS—Regina Elena National Cancer InstituteClinical Trial Center, Biostatistics and Bioinformatics UnitRomeItaly
| | | | | | - Sergey Kuznetsov
- Institute for Molecular Medicine Finland (FIMM), University of HelsinkiHelsinkiFinland
| | - Swapnil Potdar
- Institute for Molecular Medicine Finland (FIMM), University of HelsinkiHelsinkiFinland
| | - Antti Hassinen
- Institute for Molecular Medicine Finland (FIMM), University of HelsinkiHelsinkiFinland
| | - Antonella Stoppacciaro
- Department of Clinical and Molecular Medicine, Sant'Andrea HospitalSapienza University of RomeRomeItaly
| | - Pasquale Zizza
- IRCCS—Regina Elena National Cancer InstituteTranslational Oncology Research UnitRomeItaly
| | - Annamaria Biroccio
- IRCCS—Regina Elena National Cancer InstituteTranslational Oncology Research UnitRomeItaly
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Sutterlüty H, Bargl M, Holzmann K. Quantifying telomere transcripts as tool to improve risk assessment for genetic instability and genotoxicity. MUTATION RESEARCH. GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2023; 891:503690. [PMID: 37770147 DOI: 10.1016/j.mrgentox.2023.503690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 08/18/2023] [Accepted: 09/04/2023] [Indexed: 10/03/2023]
Abstract
Telomere repeat-containing RNAs (TERRA) are transcribed from telomeres as long non-coding RNAs and are part of the telomere structure with protective function. The genetic stability of cells requires telomeric repeats at the ends of chromosomes. Maintenance of telomere length (TL) is essential for proliferative capacity and chromosomal integrity. In contrast, telomere shortening is a recognized risk factor for carcinogenesis and a biomarker of aging due to the cumulative effects of environmental exposures and life experiences such as trauma or stress. In this context, telomere repeats are lost due to cell proliferation, but are also susceptible to stress factors including reactive oxygen species (ROS) inducing oxidative base damage. Quantitative PCR (qPCR) of genomic DNA is an established method to analyze TL as a tool to detect genotoxic events. That same qPCR method can be applied to RNA converted into cDNA to quantify TERRA as a useful tool to perform high-throughput screenings. This short review summarizes relevant qPCR studies using both TL and TERRA quantification, provides an overall view of the molecular mechanisms of telomere protection against ROS by TERRA, and summarizes the presented studies comparing the results at DNA and RNA levels, which indicate that fluctuations at transcript level might reflect a short-term response. Therefore, we conclude that performing both of these measurements together will improve genotoxicity studies.
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Affiliation(s)
- Hedwig Sutterlüty
- Center for Cancer Research, Comprehensive Cancer Center, Medical University Vienna, Borschkegasse 8a, A-1090 Vienna, Austria
| | - Maximilian Bargl
- Center for Cancer Research, Comprehensive Cancer Center, Medical University Vienna, Borschkegasse 8a, A-1090 Vienna, Austria
| | - Klaus Holzmann
- Center for Cancer Research, Comprehensive Cancer Center, Medical University Vienna, Borschkegasse 8a, A-1090 Vienna, Austria.
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5
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Buttet M, Bagheri R, Ugbolue UC, Laporte C, Trousselard M, Benson A, Bouillon-Minois JB, Dutheil F. Effect of a lifestyle intervention on telomere length: A systematic review and meta-analysis. Mech Ageing Dev 2022; 206:111694. [PMID: 35760212 DOI: 10.1016/j.mad.2022.111694] [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: 12/22/2021] [Revised: 06/22/2022] [Accepted: 06/22/2022] [Indexed: 11/16/2022]
Abstract
BACKGROUND We conducted a systematic review and meta-analysis to assess the effects of lifestyle intervention on telomere length (TL). METHOD Four databases were searched for studies reporting TL in leukocytes, before and after a lifestyle intervention. We computed random-effects meta-analysis on TL within intervention and control group after versus before intervention, and on changes in TL between groups. Sensitivity analyses and Meta-regression were conducted. RESULTS We included 20 studies in the systematic review (2995 participants, mean 50.3 years old, 77% women, 2045 following an intervention and 950 controls) and 19 in the meta-analysis. TL were similar at baseline between intervention and control groups. The physical activity ± diet group had an increase in TL (Effect size 0.17, 95%CI 0.03-0.31, p = 0.020) using changes within the intervention group, whereas TL shortened in the control group (-0.32, -0.61 to -0.02, p = 0.037). TL was longer in the physical activity ± diet intervention group (0.24, 0.08-0.40, p = 0.004) compared to controls after the intervention. Sensitivity analysis gave similar results. Meta-regressions demonstrated that combining strength and endurance exercise increased TL more than endurance alone or strength alone. CONCLUSION A lifestyle intervention with physical activity ± diet can increase telomere length, independently of population characteristics or baseline TL.
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Affiliation(s)
- Marjorie Buttet
- Université Clermont Auvergne, General medicine, F-63000 Clermont-Ferrand, France
| | - Reza Bagheri
- University of Isfahan, Exercise physiology department, Isfahan, Iran
| | - Ukadike C Ugbolue
- University of the West of Scotland, Health and Life Sciences, Institute for Clinical Exercise & Health Science, University of Strathclyde, Glasgow, Scotland, UK
| | - Catherine Laporte
- Université Clermont Auvergne, EA 7280 NPsy-Sydo, General medicine, F-63000 Clermont-Ferrand, France
| | - Marion Trousselard
- French Armed Forces, Biomedical Research Institute, IRBA, Neurophysiology of Stress, Neuroscience and Operational Constraint Department, Brétigny-sur-Orge, France; APEMAC/EPSAM, EA 4360, Ile du Saulcy, 57000 Metz, France
| | - Amanda Benson
- Swinburne University of Technology, Sport Innovation Research Group, Department of Health and Biostatistics, Melbourne, VIC 3122, Australia
| | - Jean-Baptiste Bouillon-Minois
- Université Clermont Auvergne, CNRS, LaPSCo, Physiological and Psychosocial Stress, University Hospital of Clermont-Ferrand, CHU Clermont-Ferrand, Emergency medicine, F-63000 Clermont-Ferrand, France.
| | - Frédéric Dutheil
- Université Clermont Auvergne, CNRS, LaPSCo, Physiological and Psychosocial Stress, University Hospital of Clermont-Ferrand, CHU Clermont-Ferrand, Occupational and Environmental Medicine, WittyFit, F-63000 Clermont-Ferrand, France
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6
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Li P, Wang ZY, Yueying Li, Liu LZ, Qiu JG, Zhang CY. Bsu polymerase-mediated fluorescence coding for rapid and sensitive detection of 8-oxo-7,8-dihydroguanine in telomeres of cancer cells. Talanta 2022; 243:123340. [PMID: 35272158 DOI: 10.1016/j.talanta.2022.123340] [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: 01/23/2022] [Revised: 02/21/2022] [Accepted: 02/26/2022] [Indexed: 11/16/2022]
Abstract
Guanine is the most susceptible to oxidation among all the DNA bases, and 8-oxo-7,8-dihydroguanine (OG) is one of main oxidation products that can occur in any part of chromosomal DNA. OG in the telomere sequence is associated with telomere shortening, cell aging, and dysfunction, and it may induce cancers. The accurate detection of OG in telomeres is important to early clinical diagnosis and molecular research. Herein, we develop a simple and rapid method to sensitively measure 8-oxo-7,8-dihydroguanine (OG) in telomeres of cancer cells by using Bsu polymerase-mediated fluorescence coding. This method is very simple without the requirement for any nucleic acid amplification or specific restriction enzyme recognition reaction, and Bsu polymerase can selectively incorporate Cy5-dATP into the opposite site of OG, endowing this method with good specificity. Moreover, the introduction of single-molecule detection significantly improves the sensitivity. This method can detect OG within 70 min with a limit of detection (LOD) of 2.45 × 10-18 M, and it can detect OG in genomic DNA extracted from H2O2-treated HeLa cells with a LOD of 0.0094 ng, holding great potential in disease-specific gene damage research and early clinic diagnosis.
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Affiliation(s)
- Panyue Li
- BGI College & Henan Institute of Medical and Pharmaceutical Sciences, Academy of Medical Sciences, Zhengzhou University, Zhengzhou, 450000, China
| | - Zi-Yue Wang
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, 250014, China.
| | - Yueying Li
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, 250014, China
| | - Ling-Zhi Liu
- Department of Oncology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Jian-Ge Qiu
- BGI College & Henan Institute of Medical and Pharmaceutical Sciences, Academy of Medical Sciences, Zhengzhou University, Zhengzhou, 450000, China.
| | - Chun-Yang Zhang
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, 250014, China.
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Li Z, Li W, Zhou D, Zhao J, Ma Y, Huang L, Dong C, Wilson JX, Huang G. Alleviating Oxidative Damage-Induced Telomere Attrition: a Potential Mechanism for Inhibition by Folic Acid of Apoptosis in Neural Stem Cells. Mol Neurobiol 2021; 59:590-602. [PMID: 34741234 DOI: 10.1007/s12035-021-02623-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Accepted: 10/26/2021] [Indexed: 01/07/2023]
Abstract
DNA oxidative damage can cause telomere attrition or dysfunction that triggers cell senescence and apoptosis. The hypothesis of this study is that folic acid decreases apoptosis in neural stem cells (NSCs) by preventing oxidative stress-induced telomere attrition. Primary cultures of NSCs were incubated for 9 days with various concentrations of folic acid (0-40 µM) and then incubated for 24 h with a combination of folic acid and an oxidant (100-µM hydrogen peroxide, H2O2), antioxidant (10-mM N-acetyl-L-cysteine, NAC), or vehicle. Intracellular folate concentration, apoptosis rate, cell proliferative capacity, telomere length, telomeric DNA oxidative damage, telomerase activity, intracellular reactive oxygen species (ROS) levels, cellular oxidative damage, and intracellular antioxidant enzyme activities were determined. The results showed that folic acid deficiency in NSCs decreased intracellular folate concentration, cell proliferation, telomere length, and telomerase activity but increased apoptosis, telomeric DNA oxidative damage, and intracellular ROS levels. In contrast, folic acid supplementation dose-dependently increased intracellular folate concentration, cell proliferative capacity, telomere length, and telomerase activity but decreased apoptosis, telomeric DNA oxidative damage, and intracellular ROS levels. Exposure to H2O2 aggravated telomere attrition and oxidative damage, whereas NAC alleviated the latter. High doses of folic acid prevented telomere attrition and telomeric DNA oxidative damage by H2O2. In conclusion, inhibition of telomeric DNA oxidative damage and telomere attrition in NSCs may be potential mechanisms of inhibiting NSC apoptosis by folic acid.
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Affiliation(s)
- Zhenshu Li
- Department of Nutrition and Food Science, School of Public Health, Tianjin Medical University, 22 Qixiangtai Road, Heping District, Tianjin, 300070, China
| | - Wen Li
- Department of Nutrition and Food Science, School of Public Health, Tianjin Medical University, 22 Qixiangtai Road, Heping District, Tianjin, 300070, China
- Tianjin Key Laboratory of Environment, Nutrition and Public Health, Tianjin, 300070, China
- Center for International Collaborative Research On Environment, Nutrition and Public Health, Tianjin, 300070, China
| | - Dezheng Zhou
- Department of Nutrition and Food Science, School of Public Health, Tianjin Medical University, 22 Qixiangtai Road, Heping District, Tianjin, 300070, China
| | - Jing Zhao
- Department of Nutrition and Food Science, School of Public Health, Tianjin Medical University, 22 Qixiangtai Road, Heping District, Tianjin, 300070, China
| | - Yue Ma
- Department of Nutrition and Food Science, School of Public Health, Tianjin Medical University, 22 Qixiangtai Road, Heping District, Tianjin, 300070, China
| | - Ling Huang
- Department of Nutrition and Food Science, School of Public Health, Tianjin Medical University, 22 Qixiangtai Road, Heping District, Tianjin, 300070, China
| | - Cuixia Dong
- Department of Nutrition and Food Science, School of Public Health, Tianjin Medical University, 22 Qixiangtai Road, Heping District, Tianjin, 300070, China
| | - John X Wilson
- Department of Exercise and Nutrition Sciences, School of Public Health and Health Professions, University at Buffalo, Buffalo, NY, 14214-8028, USA
| | - Guowei Huang
- Department of Nutrition and Food Science, School of Public Health, Tianjin Medical University, 22 Qixiangtai Road, Heping District, Tianjin, 300070, China.
- Tianjin Key Laboratory of Environment, Nutrition and Public Health, Tianjin, 300070, China.
- Center for International Collaborative Research On Environment, Nutrition and Public Health, Tianjin, 300070, China.
- The Province and Ministry Co-Sponsored Collaborative Innovation Center for Medical Epigenetics, Tianjin Medical University, Tianjin, 300070, China.
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8
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Li Z, Zhou D, Zhang D, Zhao J, Li W, Sun Y, Chen Y, Liu H, Wilson JX, Qian Z, Huang G. Folic Acid Inhibits Aging-Induced Telomere Attrition and Apoptosis in Astrocytes In Vivo and In Vitro. Cereb Cortex 2021; 32:286-297. [PMID: 34223882 DOI: 10.1093/cercor/bhab208] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 06/05/2021] [Accepted: 06/07/2021] [Indexed: 12/15/2022] Open
Abstract
Folic acid (FA) has been reported to inhibit astrocyte apoptosis and improve aging-induced disorders; however, its role in telomere attrition remains unclear. In present study, 4-month-old senescence-accelerated mouse prone 8 (SAMP8) mice were assigned to four treatment groups for the in vivo experiment: FA-deficient diet (FA-D) group, FA-normal diet (FA-N) group, low FA-supplemented diet (FA-L) group, and high FA-supplemented diet (FA-H) group. These mice were euthanized when 10 months old. There was also a young SAMP8 (4 months old) control group (Con-Y) fed with FA-normal diet. In in vitro study, primary cultures of astrocytes from hippocampus and cerebral cortex were incubated for five generations with various concentrations of FA (0-40 μM) and were assigned to five groups: FA 0 μM (generation 5), FA 10 μM (generation 5), FA 20 μM (generation 5), FA 40 μM (generation 5), and FA 10 μM (generation 1). The results showed that FA supplementation inhibited aging-induced astrocytosis, astrocyte apoptosis, neurodegeneration, and prevented telomere attrition in hippocampus and cortex of SAMP8 mice. FA supplementation also decreased apoptosis and telomere attrition, and increased telomerase activity, in primary cultures of astrocytes. These results showed that it may be one of the mechanisms that FA inhibiting aging-induced apoptosis of astrocyte by alleviating telomere attrition.
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Affiliation(s)
- Zhenshu Li
- Department of Nutrition and Food Science, School of Public Health, Tianjin Medical University, Tianjin 300070, China
| | - Dezheng Zhou
- Department of Nutrition and Food Science, School of Public Health, Tianjin Medical University, Tianjin 300070, China
| | - Dalong Zhang
- Department of Toxicology, Tianjin Centers for Disease Control and Prevention, Tianjin 300011, China
| | - Jing Zhao
- Department of Nutrition and Food Science, School of Public Health, Tianjin Medical University, Tianjin 300070, China
| | - Wen Li
- Department of Nutrition and Food Science, School of Public Health, Tianjin Medical University, Tianjin 300070, China.,Tianjin Key Laboratory of Environment, Nutrition and Public Health, Tianjin 300070, China.,Center for International Collaborative Research on Environment, Nutrition and Public Health, Tianjin 300070, China
| | - Yue Sun
- Department of Nutrition and Food Science, School of Public Health, Tianjin Medical University, Tianjin 300070, China
| | - Yongjie Chen
- Department of Epidemiology and Biostatistics, School of Public Health, Tianjin Medical University, Tianjin 300070, China
| | - Huan Liu
- Department of Nutrition and Food Science, School of Public Health, Tianjin Medical University, Tianjin 300070, China.,Tianjin Key Laboratory of Environment, Nutrition and Public Health, Tianjin 300070, China.,Center for International Collaborative Research on Environment, Nutrition and Public Health, Tianjin 300070, China
| | - John X Wilson
- Department of Exercise and Nutrition Sciences, School of Public Health and Health Professions, University at Buffalo, Buffalo, NY 14214-8028, USA
| | - Zhiyong Qian
- Department of Toxicology, Tianjin Centers for Disease Control and Prevention, Tianjin 300011, China
| | - Guowei Huang
- Department of Nutrition and Food Science, School of Public Health, Tianjin Medical University, Tianjin 300070, China.,Tianjin Key Laboratory of Environment, Nutrition and Public Health, Tianjin 300070, China.,Center for International Collaborative Research on Environment, Nutrition and Public Health, Tianjin 300070, China
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9
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Baquero JM, Benítez-Buelga C, Rajagopal V, Zhenjun Z, Torres-Ruiz R, Müller S, Hanna BMF, Loseva O, Wallner O, Michel M, Rodríguez-Perales S, Gad H, Visnes T, Helleday T, Benítez J, Osorio A. Small molecule inhibitor of OGG1 blocks oxidative DNA damage repair at telomeres and potentiates methotrexate anticancer effects. Sci Rep 2021; 11:3490. [PMID: 33568707 PMCID: PMC7876102 DOI: 10.1038/s41598-021-82917-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Accepted: 01/18/2021] [Indexed: 02/06/2023] Open
Abstract
The most common oxidative DNA lesion is 8-oxoguanine which is mainly recognized and excised by the 8-oxoG DNA glycosylase 1 (OGG1), initiating the base excision repair (BER) pathway. Telomeres are particularly sensitive to oxidative stress (OS) which disrupts telomere homeostasis triggering genome instability. In the present study, we have investigated the effects of inactivating BER in OS conditions, by using a specific inhibitor of OGG1 (TH5487). We have found that in OS conditions, TH5487 blocks BER initiation at telomeres causing an accumulation of oxidized bases, that is correlated with telomere losses, micronuclei formation and mild proliferation defects. Moreover, the antimetabolite methotrexate synergizes with TH5487 through induction of intracellular reactive oxygen species (ROS) formation, which potentiates TH5487-mediated telomere and genome instability. Our findings demonstrate that OGG1 is required to protect telomeres from OS and present OGG1 inhibitors as a tool to induce oxidative DNA damage at telomeres, with the potential for developing new combination therapies for cancer treatment.
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Affiliation(s)
- Juan Miguel Baquero
- Human Genetics Group, Human Cancer Genetics Programme, Spanish National Cancer Research Centre (CNIO), 28029, Madrid, Spain
| | - Carlos Benítez-Buelga
- Science for Life Laboratory, Department of Oncology-Pathology, Karolinska Institutet, 17121, Solna, Sweden.
| | - Varshni Rajagopal
- Science for Life Laboratory, Department of Oncology-Pathology, Karolinska Institutet, 17121, Solna, Sweden
| | - Zhao Zhenjun
- Science for Life Laboratory, Department of Oncology-Pathology, Karolinska Institutet, 17121, Solna, Sweden
| | - Raúl Torres-Ruiz
- Molecular Cytogenetics Group, Human Cancer Genetics Programme, Spanish National Cancer Research Centre (CNIO), 28029, Madrid, Spain
- Department of Biomedicine, School of Medicine, Josep Carreras Leukemia Research Institute, University of Barcelona, 08036, Barcelona, Spain
| | - Sarah Müller
- Science for Life Laboratory, Department of Oncology-Pathology, Karolinska Institutet, 17121, Solna, Sweden
| | - Bishoy M F Hanna
- Science for Life Laboratory, Department of Oncology-Pathology, Karolinska Institutet, 17121, Solna, Sweden
| | - Olga Loseva
- Science for Life Laboratory, Department of Oncology-Pathology, Karolinska Institutet, 17121, Solna, Sweden
| | - Olov Wallner
- Science for Life Laboratory, Department of Oncology-Pathology, Karolinska Institutet, 17121, Solna, Sweden
| | - Maurice Michel
- Science for Life Laboratory, Department of Oncology-Pathology, Karolinska Institutet, 17121, Solna, Sweden
| | - Sandra Rodríguez-Perales
- Molecular Cytogenetics Group, Human Cancer Genetics Programme, Spanish National Cancer Research Centre (CNIO), 28029, Madrid, Spain
| | - Helge Gad
- Department of Oncology and Metabolism, The Medical School, The University of Sheffield, Sheffield, S10 2RX, UK
| | - Torkild Visnes
- Department of Biotechnology and Nanomedicine, SINTEF Industry, 7465, Trondheim, Norway
| | - Thomas Helleday
- Science for Life Laboratory, Department of Oncology-Pathology, Karolinska Institutet, 17121, Solna, Sweden
- Department of Oncology and Metabolism, The Medical School, The University of Sheffield, Sheffield, S10 2RX, UK
| | - Javier Benítez
- Human Genetics Group, Human Cancer Genetics Programme, Spanish National Cancer Research Centre (CNIO), 28029, Madrid, Spain
- Spanish Network on Rare Diseases (CIBERER), 28029, Madrid, Spain
- Human Genotyping-CEGEN Unit, Human Cancer Genetics Programme, Spanish National Cancer Research Centre (CNIO), 28029, Madrid, Spain
| | - Ana Osorio
- Human Genetics Group, Human Cancer Genetics Programme, Spanish National Cancer Research Centre (CNIO), 28029, Madrid, Spain.
- Spanish Network on Rare Diseases (CIBERER), 28029, Madrid, Spain.
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10
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Visnes T, Benítez-Buelga C, Cázares-Körner A, Sanjiv K, Hanna BMF, Mortusewicz O, Rajagopal V, Albers JJ, Hagey DW, Bekkhus T, Eshtad S, Baquero JM, Masuyer G, Wallner O, Müller S, Pham T, Göktürk C, Rasti A, Suman S, Torres-Ruiz R, Sarno A, Wiita E, Homan EJ, Karsten S, Marimuthu K, Michel M, Koolmeister T, Scobie M, Loseva O, Almlöf I, Unterlass JE, Pettke A, Boström J, Pandey M, Gad H, Herr P, Jemth AS, El Andaloussi S, Kalderén C, Rodriguez-Perales S, Benítez J, Krokan HE, Altun M, Stenmark P, Berglund UW, Helleday T. Targeting OGG1 arrests cancer cell proliferation by inducing replication stress. Nucleic Acids Res 2020; 48:12234-12251. [PMID: 33211885 PMCID: PMC7708037 DOI: 10.1093/nar/gkaa1048] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 10/15/2020] [Accepted: 10/28/2020] [Indexed: 12/17/2022] Open
Abstract
Altered oncogene expression in cancer cells causes loss of redox homeostasis resulting in oxidative DNA damage, e.g. 8-oxoguanine (8-oxoG), repaired by base excision repair (BER). PARP1 coordinates BER and relies on the upstream 8-oxoguanine-DNA glycosylase (OGG1) to recognise and excise 8-oxoG. Here we hypothesize that OGG1 may represent an attractive target to exploit reactive oxygen species (ROS) elevation in cancer. Although OGG1 depletion is well tolerated in non-transformed cells, we report here that OGG1 depletion obstructs A3 T-cell lymphoblastic acute leukemia growth in vitro and in vivo, validating OGG1 as a potential anti-cancer target. In line with this hypothesis, we show that OGG1 inhibitors (OGG1i) target a wide range of cancer cells, with a favourable therapeutic index compared to non-transformed cells. Mechanistically, OGG1i and shRNA depletion cause S-phase DNA damage, replication stress and proliferation arrest or cell death, representing a novel mechanistic approach to target cancer. This study adds OGG1 to the list of BER factors, e.g. PARP1, as potential targets for cancer treatment.
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Affiliation(s)
- Torkild Visnes
- Science for Life Laboratory, Department of Oncology and Pathology, Karolinska Institutet, S-171 76 Stockholm, Sweden.,Department of Biotechnology and Nanomedicine, SINTEF Industry, N-7465 Trondheim,Norway
| | - Carlos Benítez-Buelga
- Science for Life Laboratory, Department of Oncology and Pathology, Karolinska Institutet, S-171 76 Stockholm, Sweden
| | - Armando Cázares-Körner
- Science for Life Laboratory, Department of Oncology and Pathology, Karolinska Institutet, S-171 76 Stockholm, Sweden
| | - Kumar Sanjiv
- Science for Life Laboratory, Department of Oncology and Pathology, Karolinska Institutet, S-171 76 Stockholm, Sweden
| | - Bishoy M F Hanna
- Science for Life Laboratory, Department of Oncology and Pathology, Karolinska Institutet, S-171 76 Stockholm, Sweden
| | - Oliver Mortusewicz
- Science for Life Laboratory, Department of Oncology and Pathology, Karolinska Institutet, S-171 76 Stockholm, Sweden
| | - Varshni Rajagopal
- Science for Life Laboratory, Department of Oncology and Pathology, Karolinska Institutet, S-171 76 Stockholm, Sweden
| | - Julian J Albers
- Science for Life Laboratory, Department of Oncology and Pathology, Karolinska Institutet, S-171 76 Stockholm, Sweden
| | - Daniel W Hagey
- Department of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Tove Bekkhus
- Science for Life Laboratory, Department of Oncology and Pathology, Karolinska Institutet, S-171 76 Stockholm, Sweden
| | - Saeed Eshtad
- Science for Life Laboratory, Department of Oncology and Pathology, Karolinska Institutet, S-171 76 Stockholm, Sweden
| | - Juan Miguel Baquero
- Human Genetics Group, Spanish National Cancer Research Centre (CNIO), Madrid, Spain
| | - Geoffrey Masuyer
- Department of Biochemistry and Biophysics, Stockholm University, SE-106 91 Stockholm, Sweden.,Department of Pharmacy and Pharmacology, Centre for Therapeutic Innovation. University of Bath, Bath BA2 7AY, UK
| | - Olov Wallner
- Science for Life Laboratory, Department of Oncology and Pathology, Karolinska Institutet, S-171 76 Stockholm, Sweden
| | - Sarah Müller
- Science for Life Laboratory, Department of Oncology and Pathology, Karolinska Institutet, S-171 76 Stockholm, Sweden
| | - Therese Pham
- Science for Life Laboratory, Department of Oncology and Pathology, Karolinska Institutet, S-171 76 Stockholm, Sweden
| | - Camilla Göktürk
- Science for Life Laboratory, Department of Oncology and Pathology, Karolinska Institutet, S-171 76 Stockholm, Sweden
| | - Azita Rasti
- Science for Life Laboratory, Department of Oncology and Pathology, Karolinska Institutet, S-171 76 Stockholm, Sweden
| | - Sharda Suman
- Science for Life Laboratory, Department of Oncology and Pathology, Karolinska Institutet, S-171 76 Stockholm, Sweden
| | - Raúl Torres-Ruiz
- Molecular Cytogenetics Group, Human Cancer Genetics Program, Spanish National Cancer Research Centre (CNIO), Madrid, 28029, Spain.,Josep Carreras Leukemia Research Institute and Department of Biomedicine, School of Medicine, University of Barcelona, Barcelona 08036, Spain
| | - Antonio Sarno
- Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway.,The Liaison Committee for Education, Research and Innovation in Central Norway, Trondheim, Norway.,Department of Environment and New Resources, SINTEF Ocean, N-7010 Trondheim, Norway
| | - Elisée Wiita
- Science for Life Laboratory, Department of Oncology and Pathology, Karolinska Institutet, S-171 76 Stockholm, Sweden
| | - Evert J Homan
- Science for Life Laboratory, Department of Oncology and Pathology, Karolinska Institutet, S-171 76 Stockholm, Sweden
| | - Stella Karsten
- Science for Life Laboratory, Department of Oncology and Pathology, Karolinska Institutet, S-171 76 Stockholm, Sweden
| | - Karthick Marimuthu
- Science for Life Laboratory, Department of Oncology and Pathology, Karolinska Institutet, S-171 76 Stockholm, Sweden
| | - Maurice Michel
- Science for Life Laboratory, Department of Oncology and Pathology, Karolinska Institutet, S-171 76 Stockholm, Sweden
| | - Tobias Koolmeister
- Science for Life Laboratory, Department of Oncology and Pathology, Karolinska Institutet, S-171 76 Stockholm, Sweden
| | - Martin Scobie
- Science for Life Laboratory, Department of Oncology and Pathology, Karolinska Institutet, S-171 76 Stockholm, Sweden
| | - Olga Loseva
- Science for Life Laboratory, Department of Oncology and Pathology, Karolinska Institutet, S-171 76 Stockholm, Sweden
| | - Ingrid Almlöf
- Science for Life Laboratory, Department of Oncology and Pathology, Karolinska Institutet, S-171 76 Stockholm, Sweden
| | - Judith Edda Unterlass
- Science for Life Laboratory, Department of Oncology and Pathology, Karolinska Institutet, S-171 76 Stockholm, Sweden
| | - Aleksandra Pettke
- Science for Life Laboratory, Department of Oncology and Pathology, Karolinska Institutet, S-171 76 Stockholm, Sweden
| | - Johan Boström
- Science for Life Laboratory, Department of Oncology and Pathology, Karolinska Institutet, S-171 76 Stockholm, Sweden.,Science for Life Laboratory, Division of Clinical Physiology, Department of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Monica Pandey
- Weston Park Cancer Centre, Department of Oncology and Metabolism, University of Sheffield, Sheffield S10 2RX, UK
| | - Helge Gad
- Weston Park Cancer Centre, Department of Oncology and Metabolism, University of Sheffield, Sheffield S10 2RX, UK
| | - Patrick Herr
- Weston Park Cancer Centre, Department of Oncology and Metabolism, University of Sheffield, Sheffield S10 2RX, UK
| | - Ann-Sofie Jemth
- Science for Life Laboratory, Department of Oncology and Pathology, Karolinska Institutet, S-171 76 Stockholm, Sweden
| | | | - Christina Kalderén
- Science for Life Laboratory, Department of Oncology and Pathology, Karolinska Institutet, S-171 76 Stockholm, Sweden
| | - Sandra Rodriguez-Perales
- Molecular Cytogenetics Group, Human Cancer Genetics Program, Spanish National Cancer Research Centre (CNIO), Madrid, 28029, Spain
| | - Javier Benítez
- Human Genetics Group, Spanish National Cancer Research Centre (CNIO), Madrid, Spain.,Spanish Network on Rare Diseases (CIBERER), Madrid, Spain
| | - Hans E Krokan
- Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway.,The Liaison Committee for Education, Research and Innovation in Central Norway, Trondheim, Norway
| | - Mikael Altun
- Science for Life Laboratory, Department of Oncology and Pathology, Karolinska Institutet, S-171 76 Stockholm, Sweden.,Science for Life Laboratory, Division of Clinical Physiology, Department of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Pål Stenmark
- Department of Biochemistry and Biophysics, Stockholm University, SE-106 91 Stockholm, Sweden.,Department of Experimental Medical Science, Lund University, SE-221 00 Lund, Sweden
| | - Ulrika Warpman Berglund
- Science for Life Laboratory, Department of Oncology and Pathology, Karolinska Institutet, S-171 76 Stockholm, Sweden
| | - Thomas Helleday
- Science for Life Laboratory, Department of Oncology and Pathology, Karolinska Institutet, S-171 76 Stockholm, Sweden.,Weston Park Cancer Centre, Department of Oncology and Metabolism, University of Sheffield, Sheffield S10 2RX, UK
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11
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Sun C, Wang K, Stock AJ, Gong Y, Demarest TG, Yang B, Giri N, Harrington L, Alter BP, Savage SA, Bohr VA, Liu Y. Re-equilibration of imbalanced NAD metabolism ameliorates the impact of telomere dysfunction. EMBO J 2020; 39:e103420. [PMID: 32935380 PMCID: PMC7604620 DOI: 10.15252/embj.2019103420] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Revised: 08/05/2020] [Accepted: 08/20/2020] [Indexed: 12/16/2022] Open
Abstract
Short telomeres are a principal defining feature of telomere biology disorders, such as dyskeratosis congenita (DC), for which there are no effective treatments. Here, we report that primary fibroblasts from DC patients and late generation telomerase knockout mice display lower nicotinamide adenine dinucleotide (NAD) levels, and an imbalance in the NAD metabolome that includes elevated CD38 NADase and reduced poly(ADP‐ribose) polymerase and SIRT1 activities, respectively, affecting many associated biological pathways. Supplementation with the NAD precursor, nicotinamide riboside, and CD38 inhibition improved NAD homeostasis, thereby alleviating telomere damage, defective mitochondrial biosynthesis and clearance, cell growth retardation, and cellular senescence of DC fibroblasts. These findings reveal a direct, underlying role of NAD dysregulation when telomeres are short and underscore its relevance to the pathophysiology and interventions of human telomere‐driven diseases.
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Affiliation(s)
- Chongkui Sun
- Biomedical Research Center, National Institute on Aging/National Institutes of Health, Baltimore, MD, USA
| | - Kun Wang
- Biomedical Research Center, National Institute on Aging/National Institutes of Health, Baltimore, MD, USA
| | - Amanda J Stock
- Biomedical Research Center, National Institute on Aging/National Institutes of Health, Baltimore, MD, USA
| | - Yi Gong
- Biomedical Research Center, National Institute on Aging/National Institutes of Health, Baltimore, MD, USA
| | - Tyler G Demarest
- Biomedical Research Center, National Institute on Aging/National Institutes of Health, Baltimore, MD, USA
| | - Beimeng Yang
- Biomedical Research Center, National Institute on Aging/National Institutes of Health, Baltimore, MD, USA
| | - Neelam Giri
- Clinical Genetics Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Lea Harrington
- Institut de Recherche en Immunologie et en Cancérologie, Université de Montréal, Montréal, QC, Canada
| | - Blanche P Alter
- Clinical Genetics Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Sharon A Savage
- Clinical Genetics Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Vilhelm A Bohr
- Biomedical Research Center, National Institute on Aging/National Institutes of Health, Baltimore, MD, USA
| | - Yie Liu
- Biomedical Research Center, National Institute on Aging/National Institutes of Health, Baltimore, MD, USA
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12
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Giorgio M, Dellino GI, Gambino V, Roda N, Pelicci PG. On the epigenetic role of guanosine oxidation. Redox Biol 2020; 29:101398. [PMID: 31926624 PMCID: PMC6926346 DOI: 10.1016/j.redox.2019.101398] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 11/23/2019] [Accepted: 12/02/2019] [Indexed: 01/14/2023] Open
Abstract
Chemical modifications of DNA and RNA regulate genome functions or trigger mutagenesis resulting in aging or cancer. Oxidations of macromolecules, including DNA, are common reactions in biological systems and often part of regulatory circuits rather than accidental events. DNA alterations are particularly relevant since the unique role of nuclear and mitochondrial genome is coding enduring and inheritable information. Therefore, an alteration in DNA may represent a relevant problem given its transmission to daughter cells. At the same time, the regulation of gene expression allows cells to continuously adapt to the environmental changes that occur throughout the life of the organism to ultimately maintain cellular homeostasis. Here we review the multiple ways that lead to DNA oxidation and the regulation of mechanisms activated by cells to repair this damage. Moreover, we present the recent evidence suggesting that DNA damage caused by physiological metabolism acts as epigenetic signal for regulation of gene expression. In particular, the predisposition of guanine to oxidation might reflect an adaptation to improve the genome plasticity to redox changes.
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Affiliation(s)
- Marco Giorgio
- Department of Experimental Oncology, European Institute of Oncology-IRCCS, Via Adamello 16, 20139, Milano, Italy; Department of Biomedical Sciences, University of Padova, Via Ugo Bassi 58/B, 35131, Padova, Italy.
| | - Gaetano Ivan Dellino
- Department of Experimental Oncology, European Institute of Oncology-IRCCS, Via Adamello 16, 20139, Milano, Italy; Department of Oncology and Hemato-Oncology, University of Milan, Milan, Italy
| | - Valentina Gambino
- Department of Experimental Oncology, European Institute of Oncology-IRCCS, Via Adamello 16, 20139, Milano, Italy
| | - Niccolo' Roda
- Department of Experimental Oncology, European Institute of Oncology-IRCCS, Via Adamello 16, 20139, Milano, Italy
| | - Pier Giuseppe Pelicci
- Department of Experimental Oncology, European Institute of Oncology-IRCCS, Via Adamello 16, 20139, Milano, Italy; Department of Oncology and Hemato-Oncology, University of Milan, Milan, Italy
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13
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Li W, Ma Y, Li Z, Lv X, Wang X, Zhou D, Luo S, Wilson JX, Huang G. Folic Acid Decreases Astrocyte Apoptosis by Preventing Oxidative Stress-Induced Telomere Attrition. Int J Mol Sci 2019; 21:ijms21010062. [PMID: 31861819 PMCID: PMC6981374 DOI: 10.3390/ijms21010062] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2019] [Revised: 12/18/2019] [Accepted: 12/18/2019] [Indexed: 12/14/2022] Open
Abstract
Astrocytes are the most widely distributed cells in the brain, and astrocyte apoptosis may play an important role in the pathogenesis of neurodegenerative diseases. Folate is required for the normal development of the nervous system, but its effect on astrocyte apoptosis is unclear. In this study, we hypothesized that folic acid (the therapeutic form of folate) decreases astrocyte apoptosis by preventing oxidative stress-induced telomere attrition. Primary cultures of astrocytes were incubated for 12 days with various concentrations of folic acid (0-40 μmol/L), then cell proliferation, apoptosis, intracellular folate concentration, intracellular homocysteine (Hcy) concentration, intracellular reactive oxygen species (ROS) levels, telomeric DNA oxidative damage, and telomere length were determined. The results showed that folic acid deficiency decreased intracellular folate, cell proliferation, and telomere length, whereas it increased Hcy concentration, ROS levels, telomeric DNA oxidative damage, and apoptosis. In contrast, folic acid dose-dependently increased intracellular folate, cell proliferation, and telomere length but it decreased Hcy concentration, ROS levels, telomeric DNA oxidative damage, and apoptosis. In conclusion, folic acid inhibited apoptosis in astrocytes. The underlying mechanism for this protective effect may be that folic acid decreased oxidative stress and thereby prevented telomeric DNA oxidative damage and telomere attrition.
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Affiliation(s)
- Wen Li
- Department of Nutrition and Food Science, School of Public Health, Tianjin Medical University, Tianjin 300070, China; (W.L.); (Y.M.); (Z.L.); (X.L.); (X.W.); (D.Z.); (S.L.)
- Tianjin Key Laboratory of Environment, Nutrition and Public Health, Tianjin 300070, China
- Center for International Collaborative Research on Environment, Nutrition and Public Health, Tianjin 300070, China
| | - Yue Ma
- Department of Nutrition and Food Science, School of Public Health, Tianjin Medical University, Tianjin 300070, China; (W.L.); (Y.M.); (Z.L.); (X.L.); (X.W.); (D.Z.); (S.L.)
| | - Zhenshu Li
- Department of Nutrition and Food Science, School of Public Health, Tianjin Medical University, Tianjin 300070, China; (W.L.); (Y.M.); (Z.L.); (X.L.); (X.W.); (D.Z.); (S.L.)
| | - Xin Lv
- Department of Nutrition and Food Science, School of Public Health, Tianjin Medical University, Tianjin 300070, China; (W.L.); (Y.M.); (Z.L.); (X.L.); (X.W.); (D.Z.); (S.L.)
| | - Xinyan Wang
- Department of Nutrition and Food Science, School of Public Health, Tianjin Medical University, Tianjin 300070, China; (W.L.); (Y.M.); (Z.L.); (X.L.); (X.W.); (D.Z.); (S.L.)
| | - Dezheng Zhou
- Department of Nutrition and Food Science, School of Public Health, Tianjin Medical University, Tianjin 300070, China; (W.L.); (Y.M.); (Z.L.); (X.L.); (X.W.); (D.Z.); (S.L.)
| | - Suhui Luo
- Department of Nutrition and Food Science, School of Public Health, Tianjin Medical University, Tianjin 300070, China; (W.L.); (Y.M.); (Z.L.); (X.L.); (X.W.); (D.Z.); (S.L.)
- Tianjin Key Laboratory of Environment, Nutrition and Public Health, Tianjin 300070, China
- Center for International Collaborative Research on Environment, Nutrition and Public Health, Tianjin 300070, China
| | - John X. Wilson
- Department of Exercise and Nutrition Sciences, School of Public Health and Health Professions, University at Buffalo, Buffalo, NY 14214-8028, USA;
| | - Guowei Huang
- Department of Nutrition and Food Science, School of Public Health, Tianjin Medical University, Tianjin 300070, China; (W.L.); (Y.M.); (Z.L.); (X.L.); (X.W.); (D.Z.); (S.L.)
- Tianjin Key Laboratory of Environment, Nutrition and Public Health, Tianjin 300070, China
- Center for International Collaborative Research on Environment, Nutrition and Public Health, Tianjin 300070, China
- Correspondence: ; Tel.: +86-22-8333-6603; Fax: +86-22-8333-6603
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14
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Lv X, Wang X, Wang Y, Zhou D, Li W, Wilson JX, Chang H, Huang G. Folic acid delays age-related cognitive decline in senescence-accelerated mouse prone 8: alleviating telomere attrition as a potential mechanism. Aging (Albany NY) 2019; 11:10356-10373. [PMID: 31757935 PMCID: PMC6914419 DOI: 10.18632/aging.102461] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Accepted: 11/08/2019] [Indexed: 02/06/2023]
Abstract
The occurrence of telomere attrition in brain may cause senescence and death of neurons, leading to cognitive decline. Folic acid (FA) has been reported to improve cognitive performance in mild cognitive impairment; however, its association with telomere remains unclear. The study aimed to investigate if alleviation of telomere attrition by FA supplementation could act as a potential mechanism to delay age-related cognitive decline in senescence-accelerated mouse prone 8 (SAMP8). Aged SAMP8 mice were assigned to four treatment groups: FAdeficient diet (FA-D) group, FA-normal diet (FA-N) group, low FA-supplemented diet (FA-L) group and high FAsupplemented diet (FA-H) group. There was also an age-matched senescence-accelerated mouse resistant 1 (SAMR1) control group (Con-R), and a young SAMP8 control group (Con-Y). The results demonstrated that FA supplementation delayed age-related cognitive decline and neurodegeneration in SAMP8 mice. Importantly, this effect could be attributed to the alleviated telomere attrition, which might be interpreted by the decreased levels of reactive oxygen species. Additionally, improved telomere integrity stimulated mitochondrial function via telomere-p53-mithondria pathway, consequently delayed neuronal degeneration. In conclusion, we demonstrate that FA supplementation delays age-related neurodegeneration and cognitive decline in SAMP8 mice, in which alleviated telomere attrition could serve as one influential factor in the process.
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Affiliation(s)
- Xin Lv
- Department of Nutrition and Food Science, School of Public Health, Tianjin Medical University, Tianjin 300070, China
- Tianjin Key Laboratory of Environment, Nutrition and Public Health, Center for International Collaborative Research on Environment, Nutrition and Public Health, Tianjin 300070, China
| | - Xinyan Wang
- Department of Nutrition and Food Science, School of Public Health, Tianjin Medical University, Tianjin 300070, China
- Tianjin Key Laboratory of Environment, Nutrition and Public Health, Center for International Collaborative Research on Environment, Nutrition and Public Health, Tianjin 300070, China
| | - Yalan Wang
- Department of Nutrition and Food Science, School of Public Health, Tianjin Medical University, Tianjin 300070, China
- Tianjin Key Laboratory of Environment, Nutrition and Public Health, Center for International Collaborative Research on Environment, Nutrition and Public Health, Tianjin 300070, China
| | - Dezheng Zhou
- Department of Nutrition and Food Science, School of Public Health, Tianjin Medical University, Tianjin 300070, China
- Tianjin Key Laboratory of Environment, Nutrition and Public Health, Center for International Collaborative Research on Environment, Nutrition and Public Health, Tianjin 300070, China
| | - Wen Li
- Department of Nutrition and Food Science, School of Public Health, Tianjin Medical University, Tianjin 300070, China
- Tianjin Key Laboratory of Environment, Nutrition and Public Health, Center for International Collaborative Research on Environment, Nutrition and Public Health, Tianjin 300070, China
| | - John X. Wilson
- Department of Exercise and Nutrition Sciences, School of Public Health and Health Professions, University at Buffalo, Buffalo, NY 14214, USA
| | - Hong Chang
- Department of Rehabilitation Medicine, Tianjin Medical University, Tianjin 300070, China
| | - Guowei Huang
- Department of Nutrition and Food Science, School of Public Health, Tianjin Medical University, Tianjin 300070, China
- Tianjin Key Laboratory of Environment, Nutrition and Public Health, Center for International Collaborative Research on Environment, Nutrition and Public Health, Tianjin 300070, China
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15
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Baquero JM, Benítez-Buelga C, Fernández V, Urioste M, García-Giménez JL, Perona R, Benítez J, Osorio A. A common SNP in the UNG gene decreases ovarian cancer risk in BRCA2 mutation carriers. Mol Oncol 2019; 13:1110-1120. [PMID: 30747491 PMCID: PMC6487686 DOI: 10.1002/1878-0261.12470] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 02/05/2019] [Accepted: 02/05/2019] [Indexed: 12/11/2022] Open
Abstract
Single nucleotide polymorphisms (SNPs) in DNA glycosylase genes involved in the base excision repair (BER) pathway can modify breast and ovarian cancer risk in BRCA1 and BRCA2 mutation carriers. We previously found that SNP rs34259 in the uracil-DNA glycosylase gene (UNG) might decrease ovarian cancer risk in BRCA2 mutation carriers. In the present study, we validated this finding in a larger series of familial breast and ovarian cancer patients to gain insights into how this UNG variant exerts its protective effect. We found that rs34259 is associated with significant UNG downregulation and with lower levels of DNA damage at telomeres. In addition, we found that this SNP is associated with significantly lower oxidative stress susceptibility and lower uracil accumulation at telomeres in BRCA2 mutation carriers. Our findings help to explain the association of this variant with a lower cancer risk in BRCA2 mutation carriers and highlight the importance of genetic changes in BER pathway genes as modifiers of cancer susceptibility for BRCA1 and BRCA2 mutation carriers.
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Affiliation(s)
- Juan Miguel Baquero
- Human Genetics Group, Spanish National Cancer Research Centre (CNIO), Madrid, Spain
| | - Carlos Benítez-Buelga
- Helleday Laboratory, Department of Oncology-Pathology, Karolinska Institutet, Solna, Sweden
| | - Victoria Fernández
- Human Genetics Group, Spanish National Cancer Research Centre (CNIO), Madrid, Spain
| | - Miguel Urioste
- Spanish Network on Rare Diseases (CIBERER), Madrid, Spain.,Familial Cancer Clinical Unit, Spanish National Cancer Research Centre (CNIO), Madrid, Spain
| | - Jose Luis García-Giménez
- Spanish Network on Rare Diseases (CIBERER), Madrid, Spain.,Department of Physiology, Faculty of Medicine and Dentistry, Universitat de Valencia, Mixed Unit CIPF-INCLIVA, Spain
| | - Rosario Perona
- Spanish Network on Rare Diseases (CIBERER), Madrid, Spain.,Biomedical Research Institute Alberto Sols (CSIC-UAM), Madrid, Spain
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- Consortium of Investigators of Modifiers of BRCA1/2
| | - Javier Benítez
- Human Genetics Group, Spanish National Cancer Research Centre (CNIO), Madrid, Spain.,Spanish Network on Rare Diseases (CIBERER), Madrid, Spain.,Genotyping Unit (CEGEN), Spanish National Cancer Research Centre (CNIO), Madrid, Spain
| | - Ana Osorio
- Human Genetics Group, Spanish National Cancer Research Centre (CNIO), Madrid, Spain.,Spanish Network on Rare Diseases (CIBERER), Madrid, Spain
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16
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Pintado-Berninches L, Fernandez-Varas B, Benitez-Buelga C, Manguan-Garcia C, Serrano-Benitez A, Iarriccio L, Carrillo J, Guenechea G, Egusquiaguirre SP, Pedraz JL, Hernández RM, Igartua M, Arias-Salgado EG, Cortés-Ledesma F, Sastre L, Perona R. GSE4 peptide suppresses oxidative and telomere deficiencies in ataxia telangiectasia patient cells. Cell Death Differ 2019; 26:1998-2014. [PMID: 30670828 DOI: 10.1038/s41418-018-0272-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2018] [Revised: 11/21/2018] [Accepted: 12/03/2018] [Indexed: 01/05/2023] Open
Abstract
Ataxia telangiectasia (AT) is a genetic disease caused by mutations in the ATM gene but the mechanisms underlying AT are not completely understood. Key functions of the ATM protein are to sense and regulate cellular redox status and to transduce DNA double-strand break signals to downstream effectors. ATM-deficient cells show increased ROS accumulation, activation of p38 protein kinase, and increased levels of DNA damage. GSE24.2 peptide and a short derivative GSE4 peptide corresponding to an internal domain of Dyskerin have proved to induce telomerase activity, decrease oxidative stress, and protect from DNA damage in dyskeratosis congenita (DC) cells. We have found that expression of GSE24.2 and GSE4 in human AT fibroblast is able to decrease DNA damage, detected by γ-H2A.X and 53BP1 foci. However, GSE24.2/GSE4 expression does not improve double-strand break signaling and repair caused by the lack of ATM activity. In contrast, they cause a decrease in 8-oxoguanine and OGG1-derived lesions, particularly at telomeres and mitochondrial DNA, as well as in reactive oxygen species, in parallel with increased expression of SOD1. These cells also showed lower levels of IL6 and decreased p38 phosphorylation, decreased senescence and increased ability to divide for longer times. Additionally, these cells are more resistant to treatment with H202 and the radiomimetic-drug bleomycin. Finally, we found shorter telomere length (TL) in AT cells, lower levels of TERT expression, and telomerase activity that were also partially reverted by GSE4. These observations suggest that GSE4 may be considered as a new therapy for the treatment of AT that counteracts the cellular effects of high ROS levels generated in AT cells and in addition increases telomerase activity contributing to increased cell proliferation.
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Affiliation(s)
- Laura Pintado-Berninches
- Instituto de Investigaciones Biomédicas CSIC/UAM, IDiPaz, C/ Arturo Duperier, 4, 28029, Madrid, Spain.,Advanced Medical Projects, Madrid, Spain
| | - Beatriz Fernandez-Varas
- Instituto de Investigaciones Biomédicas CSIC/UAM, IDiPaz, C/ Arturo Duperier, 4, 28029, Madrid, Spain
| | | | - Cristina Manguan-Garcia
- Instituto de Investigaciones Biomédicas CSIC/UAM, IDiPaz, C/ Arturo Duperier, 4, 28029, Madrid, Spain.,CIBER de Enfermedades Raras, Madrid, Spain
| | - Almudena Serrano-Benitez
- Centro Andaluz de Biologia Molecular y Medicina regenerativa (CABIMER) - CSIC, Universidad de Sevilla, Universidad Pablo de Olavide, Sevilla, Spain
| | - Laura Iarriccio
- Instituto de Investigaciones Biomédicas CSIC/UAM, IDiPaz, C/ Arturo Duperier, 4, 28029, Madrid, Spain.,Advanced Medical Projects, Madrid, Spain
| | - Jaime Carrillo
- Instituto de Investigaciones Biomédicas CSIC/UAM, IDiPaz, C/ Arturo Duperier, 4, 28029, Madrid, Spain
| | - Guillermo Guenechea
- CIBER de Enfermedades Raras, Madrid, Spain.,Division of Hematopoietic Innovative Therapies, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain.,Advanced Therapies Unit, Instituto de Investigación Sanitaria Fundación Jiménez Díaz (IIS-FJD), Madrid, Spain
| | - Susana P Egusquiaguirre
- NanoBioCel Group, Laboratory of Pharmaceutics, University of the Basque Country, School of Pharmacy, Vitoria-Gasteiz, Spain.,Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Vitoria-Gasteiz, Spain
| | - Jose-Luis Pedraz
- NanoBioCel Group, Laboratory of Pharmaceutics, University of the Basque Country, School of Pharmacy, Vitoria-Gasteiz, Spain.,Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Vitoria-Gasteiz, Spain
| | - Rosa M Hernández
- NanoBioCel Group, Laboratory of Pharmaceutics, University of the Basque Country, School of Pharmacy, Vitoria-Gasteiz, Spain.,Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Vitoria-Gasteiz, Spain
| | - Manoli Igartua
- NanoBioCel Group, Laboratory of Pharmaceutics, University of the Basque Country, School of Pharmacy, Vitoria-Gasteiz, Spain.,Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Vitoria-Gasteiz, Spain
| | - Elena G Arias-Salgado
- Instituto de Investigaciones Biomédicas CSIC/UAM, IDiPaz, C/ Arturo Duperier, 4, 28029, Madrid, Spain.,Advanced Medical Projects, Madrid, Spain
| | - Felipe Cortés-Ledesma
- Centro Andaluz de Biologia Molecular y Medicina regenerativa (CABIMER) - CSIC, Universidad de Sevilla, Universidad Pablo de Olavide, Sevilla, Spain
| | - Leandro Sastre
- Instituto de Investigaciones Biomédicas CSIC/UAM, IDiPaz, C/ Arturo Duperier, 4, 28029, Madrid, Spain.,CIBER de Enfermedades Raras, Madrid, Spain
| | - Rosario Perona
- Instituto de Investigaciones Biomédicas CSIC/UAM, IDiPaz, C/ Arturo Duperier, 4, 28029, Madrid, Spain. .,CIBER de Enfermedades Raras, Madrid, Spain.
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17
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Zhang Y, Hua RN, Xiang D, Zhang CY. Single-molecule counting of oxidative DNA damage in telomeres from cancer cells. Chem Commun (Camb) 2019; 55:7627-7630. [DOI: 10.1039/c9cc03766g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
We demonstrate for the first time the single-molecule counting of oxidative DNA damage in telomeres from cancer cells.
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Affiliation(s)
- Yan Zhang
- College of Chemistry
- Chemical Engineering and Materials Science
- Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong
- Key Laboratory of Molecular and Nano Probes
- Ministry of Education
| | - Ruo-nan Hua
- College of Chemistry
- Chemical Engineering and Materials Science
- Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong
- Key Laboratory of Molecular and Nano Probes
- Ministry of Education
| | - Dongxue Xiang
- College of Chemistry
- Chemical Engineering and Materials Science
- Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong
- Key Laboratory of Molecular and Nano Probes
- Ministry of Education
| | - Chun-yang Zhang
- College of Chemistry
- Chemical Engineering and Materials Science
- Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong
- Key Laboratory of Molecular and Nano Probes
- Ministry of Education
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18
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Effect of a 12-month exercise intervention on leukocyte telomere length: Results from the ALPHA Trial. Cancer Epidemiol 2018; 56:67-74. [PMID: 30075329 DOI: 10.1016/j.canep.2018.07.012] [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: 01/19/2018] [Revised: 07/19/2018] [Accepted: 07/20/2018] [Indexed: 11/21/2022]
Abstract
BACKGROUND Short telomeres may indicate a higher risk of cancer and other chronic diseases. Some observational studies show positive associations between leukocyte telomere length (LTL) and physical activity levels. We hypothesized, therefore, that exercise may be one strategy for slowing telomere attrition. METHODS We conducted an ancillary analysis of blood from a year-long, two-centred, two-armed (1:1) randomized controlled trial of aerobic exercise versus usual inactivity. The analysis included 212 physically inactive, disease-free, non-smoking, postmenopausal women (n = 99 exercisers, n = 113 controls) in Alberta, Canada (2003-2006). The exercise prescription was aerobic exercise five days/week (supervised three days/week), 45 min/session, achieving 70-80% heart rate reserve. Baseline and 12-month LTL were analyzed using quantitative real-time polymerase chain reactions (qPCR). The primary statistical analysis was intention-to-treat, comparing the ratio of mean LTLs (12-months:baseline) for exercisers versus controls from a general linear model. Secondary analyses included a per-protocol analysis (≥90% adherence) and analyses stratified by baseline LTL, age, body mass index, and fitness level, respectively. RESULTS Participants were overweight at baseline (mean BMI = 29 kg/m2). The primary analysis showed no evidence that LTL change differed between groups (12-month mean LTL change for the exercise group: -13% (95% CI: -32%, 11%) versus controls: -8% (95%CI: -27%, 15%); treatment effect ratio (TER, Exercise/Control) = 0.95 (95% CI: 0.68, 1.32). Per-protocol results were similar (TER = 0.87, 95% CI: 0.59, 1.30). In stratified models, TERs ranged from 0.68 to 1.35 across strata and P-interaction > 0.05). CONCLUSION We found no evidence to suggest that one year of aerobic exercise alters telomere attrition significantly in healthy postmenopausal women.
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19
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Benítez-Buelga C, Baquero JM, Vaclova T, Fernández V, Martín P, Inglada-Perez L, Urioste M, Osorio A, Benítez J. Genetic variation in the NEIL2 DNA glycosylase gene is associated with oxidative DNA damage in BRCA2 mutation carriers. Oncotarget 2017; 8:114626-114636. [PMID: 29383107 PMCID: PMC5777719 DOI: 10.18632/oncotarget.22638] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Accepted: 10/27/2017] [Indexed: 01/01/2023] Open
Abstract
In this report, we have tried to gain molecular insight into a single nucleotide polymorphism (SNP) in the NEIL2 gene previously identified as "cancer risk modifier" for BRCA2 mutation carriers. To that end, we studied the role of this SNP (rs804271) on NEIL2 transcriptional regulation, oxidative DNA damage and genome instability in two independent set of samples: The first one was a series of eighty-six BRCA1 and BRCA2 mutation carriers and eighty non-carrier controls in which we evaluated the effect of the SNP on NEIL2 gene expression and oxidative DNA damage accumulation. The second was a set of twenty lymphoblastoid cell lines (LCLs), thirteen BRCA1 mutation carriers and seven non-carriers control, that were used to analyze the correlation between NEIL2 mRNA and/or protein levels, the oxidative and the double stranded break (DSB) DNA damage levels. Our results suggest that an excessive production of NEIL2 enzyme, associated with the SNP, may have a deleterious effect modifying cancer risk susceptibility in BRCA2 mutation carriers. We hypothesize that due to the SNP impact on NEIL2 transcriptional upregulation, a cascade of events may converge in the accumulation of oxidative DNA damage and its posterior conversion into DSBs for this specific group of patients.
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Affiliation(s)
| | - Juan Miguel Baquero
- Human Genetics Group, Spanish National Cancer Research Center (CNIO), Madrid, Spain
| | - Tereza Vaclova
- Human Genetics Group, Spanish National Cancer Research Center (CNIO), Madrid, Spain
| | - Victoria Fernández
- Human Genetics Group, Spanish National Cancer Research Center (CNIO), Madrid, Spain
| | - Paloma Martín
- Human Genetics Group, Spanish National Cancer Research Center (CNIO), Madrid, Spain
- Spanish Network on Rare Diseases (CIBERER), Madrid, Spain
| | - Lucia Inglada-Perez
- Endocrine Cancer Group, Spanish National Cancer Research Center (CNIO), Madrid, Spain
- Spanish Network on Rare Diseases (CIBERER), Madrid, Spain
| | - Miguel Urioste
- Familial Cancer Unit, Spanish National Cancer Research Center (CNIO), Madrid, Spain
- Spanish Network on Rare Diseases (CIBERER), Madrid, Spain
| | - Ana Osorio
- Human Genetics Group, Spanish National Cancer Research Center (CNIO), Madrid, Spain
- Spanish Network on Rare Diseases (CIBERER), Madrid, Spain
| | - Javier Benítez
- Human Genetics Group, Spanish National Cancer Research Center (CNIO), Madrid, Spain
- Spanish Network on Rare Diseases (CIBERER), Madrid, Spain
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20
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Galletly C, Dhillon VS, Liu D, Balzan RP, Hahn LA, Fenech MF. Shorter telomere length in people with schizophrenia: A preliminary study from Australia. Schizophr Res 2017; 190:46-51. [PMID: 28285024 DOI: 10.1016/j.schres.2017.03.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Revised: 02/28/2017] [Accepted: 03/02/2017] [Indexed: 12/26/2022]
Abstract
Schizophrenia is a complex mental illness affecting the normal functioning of the brain, interfering with the ability to think, feel and act. It can be conceptualised as a syndrome of accelerated ageing, with early onset of cardiovascular disease and high rates of premature mortality. Telomere attrition increases with oxidative stress and is considered a biomarker of ageing. Previous studies have assessed abnormalities in telomere length in schizophrenia, but the results are inconsistent. The present study used a case-control design to assess whether people with schizophrenia have shortened telomeres, indicative of accelerated ageing. Subjects were all male, aged 25-35years, living in the same urban region of Adelaide, South Australia. Telomere length was measured using a quantitative real-time polymerase chain reaction (PCR) method. We found significantly shorter telomeres in people with schizophrenia relative to healthy controls. This is the first study to show telomere attrition among people with schizophrenia in Australia. Shorter telomere length may indicate the common pathways that schizophrenia shares with other neuropsychiatric and neurodevelopmental disorders associated with increased cellular senescence. Further well-controlled larger studies in people with schizophrenia are required to fully understand (i) the role of variables that have the potential to modulate telomere length such as use of antipsychotic drugs, medical conditions, parental age, smoking, alcohol abuse and use of illicit drugs; (ii) effective treatments to slow telomere erosion and (iii) mechanisms responsible for accelerating and reducing telomere damage.
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Affiliation(s)
- Cherrie Galletly
- Discipline of Psychiatry, University of Adelaide, Adelaide, SA, Australia; Northern Adelaide Local Health Network, Adelaide, SA, Australia; Ramsay Health Care (SA) Mental Health, Australia.
| | - Varinderpal S Dhillon
- Nutrigenomics & DNA Damage Diagnostics, CSIRO Health and Biosecurity, Adelaide, SA, Australia
| | - Dennis Liu
- Discipline of Psychiatry, University of Adelaide, Adelaide, SA, Australia; Northern Adelaide Local Health Network, Adelaide, SA, Australia
| | - Ryan P Balzan
- School of Psychology, Flinders University, Adelaide, SA, Australia
| | - Lisa A Hahn
- Discipline of Psychiatry, University of Adelaide, Adelaide, SA, Australia; Ramsay Health Care (SA) Mental Health, Australia
| | - Michael F Fenech
- Nutrigenomics & DNA Damage Diagnostics, CSIRO Health and Biosecurity, Adelaide, SA, Australia
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21
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Hemmeryckx B, Hohensinner P, Swinnen M, Heggermont W, Wojta J, Lijnen HR. Antioxidant Treatment Improves Cardiac Dysfunction in a Murine Model of Premature Aging. J Cardiovasc Pharmacol 2016; 68:374-382. [PMID: 27824722 DOI: 10.1097/fjc.0000000000000423] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Bmal1-(brain and muscle ARNT-like protein-1) deficient (Bmal1) mice prematurely age because of an increased reactive oxygen species (ROS) production. These mice also show a decline in cardiac function with age. We investigated whether an antioxidant treatment can ameliorate the declining cardiac function in prematurely aged Bmal1 mice. Male Bmal1 and wild-type (Bmal1) mice were exposed for 15 weeks to a high fat and high cholesterol diet with or without the antioxidant 4-hydroxy-2,2,6,6-tetramethylpiperidin-1-oxyl (TEMPOL; 5 mmol/L; in drinking water during the last 10 weeks). Echocardiographic analysis revealed that TEMPOL treatment of Bmal1 mice normalized cardiac function, as evidenced by a decrease in left ventricular diastolic and systolic internal diameters, and by an increase in fractional shortening and ejection fraction. The antioxidant did not affect cardiac function in Bmal1 mice. Although TEMPOL did not influence cardiac ROS levels in Bmal1 mice, it significantly protected Bmal1 cardiac telomeres from oxidation, as evidenced by a reduction in the telomere damage score (0.11 ± 0.012% vs. 0.16 ± 0.015%; P = 0.028). Thus, antioxidant treatment normalized cardiac function of Bmal1 mice, probably in part by scavenging ROS.
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Affiliation(s)
- Bianca Hemmeryckx
- *Center for Molecular and Vascular Biology, Department of Cardiovascular Sciences, KU Leuven, Leuven, Belgium; †Division of Cardiology, Department of Internal Medicine II, Medical University of Vienna, Vienna, Austria; ‡Cardiology, Department of Cardiovascular Sciences, KU Leuven, Leuven, Belgium; §Department of Internal Medicine, Service of Cardiology, University Hospitals Leuven, Leuven, Belgium
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22
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Abstract
Telomeres at chromosome ends are nucleoprotein structures consisting of tandem TTAGGG repeats and a complex of proteins termed shelterin. DNA damage and repair at telomeres is uniquely influenced by the ability of telomeric DNA to form alternate structures including loops and G-quadruplexes, coupled with the ability of shelterin proteins to interact with and regulate enzymes in every known DNA repair pathway. The role of shelterin proteins in preventing telomeric ends from being falsely recognized and processed as DNA double strand breaks is well established. Here we focus instead on recent developments in understanding the roles of shelterin proteins and telomeric DNA sequence and structure in processing genuine damage at telomeres induced by endogenous and exogenous DNA damage agents. We will highlight advances in double strand break repair, base excision repair and nucleotide excision repair at telomeres, and will discuss important questions remaining in the field.
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Affiliation(s)
- Elise Fouquerel
- Department of Environmental and Occupational Health, University of Pittsburgh Graduate School of Public Health, University of Pittsburgh Cancer Institute Research Pavilion, 5117 Centre Avenue, University of Pittsburgh, Pittsburgh, PA 15213, United States
| | - Dhvani Parikh
- Department of Environmental and Occupational Health, University of Pittsburgh Graduate School of Public Health, University of Pittsburgh Cancer Institute Research Pavilion, 5117 Centre Avenue, University of Pittsburgh, Pittsburgh, PA 15213, United States
| | - Patricia Opresko
- Department of Environmental and Occupational Health, University of Pittsburgh Graduate School of Public Health, University of Pittsburgh Cancer Institute Research Pavilion, 5117 Centre Avenue, University of Pittsburgh, Pittsburgh, PA 15213, United States.
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23
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An N, Fleming AM, Burrows CJ. Human Telomere G-Quadruplexes with Five Repeats Accommodate 8-Oxo-7,8-dihydroguanine by Looping out the DNA Damage. ACS Chem Biol 2016; 11:500-7. [PMID: 26686913 DOI: 10.1021/acschembio.5b00844] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Inflammation and oxidative stress generate free radicals that oxidize guanine (G) in DNA to 8-oxo-7,8-dihydroguanine (OG), and this reaction is prominent in the G-rich telomere sequence. In telomeres, OG is not efficiently removed by repair pathways allowing its concentration to build, surprisingly without any immediate negative consequences to stability. Herein, OG was synthesized in five repeats of the human telomere sequence (TTAGGG)n, at the 5'-G of the 5'-most, middle, and 3'-most G tracks, representing hotspots for oxidation. These synthetic oligomers were folded in relevant amounts of K(+)/Na(+) to adopt hybrid G-quadruplex folds. The structural impact of OG was assayed by circular dichroism, thermal melting, (1)H NMR, and single-molecule profiling by the α-hemolysin nanopore. On the basis of these results, OG was well accommodated in the five-repeat sequences by looping out the damaged G track to allow the other four tracks to adopt a hybrid G-quadruplex. These results run counter to previous studies with OG in four-repeat telomere sequences that found OG to be highly destabilizing and causing significant reorientation of the fold. When taking a wider view of the human telomere sequence and considering additional repeats, we found OG to cause minimal impact on the structure. The plasticity of this repeat sequence addresses how OG concentrations can increase in telomeres without immediate telomere instability or attrition.
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Affiliation(s)
- Na An
- Department of Chemistry, University of Utah, 315 South 1400
East, Salt Lake City, Utah 84112-0850, United States
| | - Aaron M. Fleming
- Department of Chemistry, University of Utah, 315 South 1400
East, Salt Lake City, Utah 84112-0850, United States
| | - Cynthia J. Burrows
- Department of Chemistry, University of Utah, 315 South 1400
East, Salt Lake City, Utah 84112-0850, United States
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24
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Hohensinner PJ, Kaun C, Buchberger E, Ebenbauer B, Demyanets S, Huk I, Eppel W, Maurer G, Huber K, Wojta J. Age intrinsic loss of telomere protection via TRF1 reduction in endothelial cells. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2015; 1863:360-7. [PMID: 26658719 DOI: 10.1016/j.bbamcr.2015.11.034] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Revised: 11/26/2015] [Accepted: 11/28/2015] [Indexed: 12/30/2022]
Abstract
Aging is a major factor predisposing for multiple diseases. Telomeres at the ends of chromosomes protect the integrity of chromosomal DNA. A specialized six-protein complex termed shelterin protects the telomere from unwanted interaction with DNA damage pathways. The aim of our study was to evaluate the integrity of telomeres and the stability of telomere protection during aging in endothelial cells (EC). We describe that aging EC can be characterized by an increased cell size (40%, p=0.02) and increased expression of PAI 1 (4 fold, p=0.02), MCP1 (10 fold, p=0.001) and GMCSF (15 fold, p=0.004). Telomeric state in aging cells is defined by an increased telomere oxidation (27%, p=0.01), reduced telomere length (62%, p=0.02), and increased DNA damage foci formation (5% in young EC versus 16% in aged EC, p=0.003). This telomeric dysfunction is accompanied by a reduction in the shelterin component TRF1 (33% mRNA, p=0.001; 24% protein, p=0.007). Overexpression of TRF1 in aging EC reduced telomere-associated DNA damage foci to 5% (p=0.02) and reduced expression levels of MCP1 (18% reduction, p=0.008). Aged EC have increased telomere damage and an intrinsic loss of telomere protection. Reestablishing telomere integrity could therefore be a target for rejuvenating endothelial cell function.
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Affiliation(s)
- P J Hohensinner
- Department of Internal Medicine II, Cardiology, Medical University of Vienna, Vienna, Austria.
| | - C Kaun
- Department of Internal Medicine II, Cardiology, Medical University of Vienna, Vienna, Austria
| | - E Buchberger
- Department of Surgery, Medical University of Vienna, Vienna, Austria
| | - B Ebenbauer
- Department of Internal Medicine II, Cardiology, Medical University of Vienna, Vienna, Austria; Ludwig Boltzmann Cluster for Cardiovascular Research, Vienna, Austria
| | - S Demyanets
- Department of Internal Medicine II, Cardiology, Medical University of Vienna, Vienna, Austria; Department of Laboratory Medicine, Medical University of Vienna, Vienna, Austria
| | - I Huk
- Department of Surgery, Division of Vascular Surgery, Medical University of Vienna, Vienna, Austria
| | - W Eppel
- Department of Gynecology, Medical University of Vienna, Vienna, Austria
| | - G Maurer
- Department of Internal Medicine II, Cardiology, Medical University of Vienna, Vienna, Austria
| | - K Huber
- Ludwig Boltzmann Cluster for Cardiovascular Research, Vienna, Austria; 3rd Medical Department, Wilhelminenhospital, Vienna, Austria
| | - J Wojta
- Department of Internal Medicine II, Cardiology, Medical University of Vienna, Vienna, Austria; Ludwig Boltzmann Cluster for Cardiovascular Research, Vienna, Austria; Core Facilities, Medical University of Vienna, Vienna, Austria
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25
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Sharif R, Thomas P, Zalewski P, Fenech M. Zinc supplementation influences genomic stability biomarkers, antioxidant activity, and zinc transporter genes in an elderly Australian population with low zinc status. Mol Nutr Food Res 2015; 59:1200-12. [PMID: 25755079 DOI: 10.1002/mnfr.201400784] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Revised: 01/19/2015] [Accepted: 02/17/2015] [Indexed: 12/18/2022]
Abstract
SCOPE An increased intake of Zinc (Zn) may reduce the risk of degenerative diseases but may prove to be toxic if taken in excess. This study aimed to investigate whether zinc carnosine supplement can improve Zn status, genome stability events, and Zn transporter gene expression in an elderly (65-85 years) South Australian cohort with low plasma Zn levels. METHODS AND RESULTS A 12-week placebo-controlled intervention trial was performed with 84 volunteers completing the study, (placebo, n = 42) and (Zn group, n = 42). Plasma Zn was significantly increased (p < 0.05) by 5.69% in the Zn supplemented group after 12 weeks. A significant (p < 0.05) decrease in the micronucleus frequency (-24.18%) was observed for the Zn supplemented cohort relative to baseline compared to the placebo group. Reductions of -7.09% for tail moment and -8.76% for tail intensity were observed for the Zn group (relative to baseline) (p < 0.05). Telomere base damage was found to be also significantly decreased in the Zn group (p < 0.05). Both MT1A and ZIP1 expression showed a significant increase in the Zn supplemented group (p < 0.05). CONCLUSION Zn supplementation may have a beneficial effect in an elderly population with low Zn levels by improving Zn status, antioxidant profile, and lowering DNA damage.
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Affiliation(s)
- Razinah Sharif
- Program of Nutritional Sciences, School of HealthCare Sciences, Faculty of Health Science, Universiti Kebangsaan Malaysia, Malaysia.,CSIRO Food and Nutrition, Adelaide, South Australia, Australia.,School of Medicine, Faculty of Health Sciences, University of Adelaide, South Australia, Australia
| | - Philip Thomas
- CSIRO Food and Nutrition, Adelaide, South Australia, Australia
| | - Peter Zalewski
- School of Medicine, Faculty of Health Sciences, University of Adelaide, South Australia, Australia
| | - Michael Fenech
- CSIRO Food and Nutrition, Adelaide, South Australia, Australia
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Taniguchi Y, Kikukawa Y, Sasaki S. Discrimination Between 8-Oxo-2′-Deoxyguanosine and 2′-Deoxyguanosine in DNA by the Single Nucleotide Primer Extension Reaction with Adap Triphosphate. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201412086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Zhou J, Fleming AM, Averill AM, Burrows CJ, Wallace SS. The NEIL glycosylases remove oxidized guanine lesions from telomeric and promoter quadruplex DNA structures. Nucleic Acids Res 2015; 43:4039-54. [PMID: 25813041 PMCID: PMC4417164 DOI: 10.1093/nar/gkv252] [Citation(s) in RCA: 111] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Accepted: 03/11/2015] [Indexed: 12/31/2022] Open
Abstract
G-quadruplex is a four-stranded G-rich DNA structure that is highly susceptible to oxidation. Despite the important roles that G-quadruplexes play in telomere biology and gene transcription, neither the impact of guanine lesions on the stability of quadruplexes nor their repair are well understood. Here, we show that the oxidized guanine lesions 8-oxo-7,8-dihydroguanine (8-oxoG), guanidinohydantoin (Gh) and spiroiminodihydantoin (Sp) reduce the thermostability and alter the folding of telomeric quadruplexes in a location-dependent manner. Also, the NEIL1 and NEIL3 DNA glycosylases can remove hydantoin lesions but none of the glycosylases, including OGG1, are able to remove 8-oxoG from telomeric quadruplexes. Interestingly, a hydantoin lesion at the site most prone to oxidation in quadruplex DNA is not efficiently removed by NEIL1 or NEIL3. However, NEIL1, NEIL2 and NEIL3 remove hydantoins from telomeric quadruplexes formed by five TTAGGG repeats much more rapidly than the commonly studied four-repeat quadruplex structures. We also show that APE1 cleaves furan in selected positions in Na+-coordinated telomeric quadruplexes. In promoter G-quadruplex DNA, the NEIL glycosylases primarily remove Gh from Na+-coordinated antiparallel quadruplexes but not K+-coordinated parallel quadruplexes containing VEGF or c-MYC promoter sequences. Thus, the NEIL DNA glycosylases may be involved in both telomere maintenance and in gene regulation.
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Affiliation(s)
- Jia Zhou
- Department of Microbiology and Molecular Genetics, University of Vermont, Burlington, VT 05405, USA
| | - Aaron M Fleming
- Department of Chemistry, University of Utah, Salt Lake City, UT 84112, USA
| | - April M Averill
- Department of Microbiology and Molecular Genetics, University of Vermont, Burlington, VT 05405, USA
| | - Cynthia J Burrows
- Department of Chemistry, University of Utah, Salt Lake City, UT 84112, USA
| | - Susan S Wallace
- Department of Microbiology and Molecular Genetics, University of Vermont, Burlington, VT 05405, USA
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An N, Fleming AM, White HS, Burrows CJ. Nanopore detection of 8-oxoguanine in the human telomere repeat sequence. ACS NANO 2015; 9:4296-307. [PMID: 25768204 PMCID: PMC4790916 DOI: 10.1021/acsnano.5b00722] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2015] [Accepted: 03/13/2015] [Indexed: 05/23/2023]
Abstract
The human telomere repeat sequence 5'-TTAGGG-3' is a hot spot for oxidation at guanine, yielding 8-oxo-7,8-dihydroguanine (OG), a biomarker of oxidative stress. Telomere shortening resulting from oxidation will ultimately induce cellular senescence. In this study, α-hemolysin (α-HL) nanopore technology was applied to detect and quantify OG in the human telomeric DNA sequence. This repeat sequence adopts a basket G-quadruplex in the NaCl electrolyte used for analysis that enters the α-HL channel, slowly unfolds, and translocates. The basket fold containing OG disrupts the structure, leading to >10× increase in the unfolding kinetics without yielding a detectable current pattern. Therefore, detection of OG with α-HL required labeling of OG with aminomethyl-[18-crown-6] using a mild oxidant. The labeled OG yielded a pulse-like signal in the current vs time trace when the DNA strand was electrophoretically passed through α-HL in NaCl electrolyte. However, the rate of translocation was too slow using NaCl salts, leading us to further refine the method. A mixture of NH4Cl and LiCl electrolytes induced the propeller fold that unravels quickly outside the α-HL channel. This electrolyte allowed observation of the labeled OG, while providing a faster recording of the currents. Lastly, OG distributions were probed with this method in a 120-mer stretch of the human telomere sequence exposed to the cellular oxidant (1)O2. Single-molecule profiles determined the OG distributions to be random in this context. Application of the method in nanomedicine can potentially address many questions surrounding oxidative stress and telomere attrition observed in various disease phenotypes including prostate cancer and diabetes.
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Taniguchi Y, Kikukawa Y, Sasaki S. Discrimination between 8-oxo-2'-deoxyguanosine and 2'-deoxyguanosine in DNA by the single nucleotide primer extension reaction with adap triphosphate. Angew Chem Int Ed Engl 2015; 54:5147-51. [PMID: 25727406 DOI: 10.1002/anie.201412086] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Revised: 01/12/2015] [Indexed: 12/16/2022]
Abstract
The adenosine derivative of 2-oxo-1,3-diazaphenoxazine (Adap) exhibits a superb ability to recognize and form base pairs with 8-oxo-2'-deoxyguanosine (8-oxo-dG) in duplex DNA. In this study, the triphosphate of Adap (dAdapTP) was synthesized and tested for single nucleotide incorporation into primer strands using the Klenow Fragment. The efficiency of dAdapTP incorporation into 8-oxo-dG-containing templates was more than 36-fold higher than with dG-containing templates, and provides better discrimination than does the incorporation of natural 2'-deoxyadenosine triphosphate (dATP). The selective incorporation of dAdapTP into 8-oxo-dG templates was therefore applied to the detection of 8-oxo-dG in human telomeric DNA sequences extracted from H2 O2 -treated HeLa cells. The enzymatic incorporation of dAdapTP into 8-oxo-dG-containing templates may provide a novel basis for sequencing oxidative DNA damage in the genome.
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Affiliation(s)
- Yosuke Taniguchi
- Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582 (Japan).
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Oxidative stress induces persistent telomeric DNA damage responsible for nuclear morphology change in mammalian cells. PLoS One 2014; 9:e110963. [PMID: 25354277 PMCID: PMC4212976 DOI: 10.1371/journal.pone.0110963] [Citation(s) in RCA: 130] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Accepted: 09/22/2014] [Indexed: 02/07/2023] Open
Abstract
One main function of telomeres is to maintain chromosome and genome stability. The rate of telomere shortening can be accelerated significantly by chemical and physical environmental agents. Reactive oxygen species are a source of oxidative stress and can produce modified bases (mainly 8-oxoG) and single strand breaks anywhere in the genome. The high incidence of guanine residues in telomeric DNA sequences makes the telomere a preferred target for oxidative damage. Our aim in this work is to evaluate whether chromosome instability induced by oxidative stress is related specifically to telomeric damage. We treated human primary fibroblasts (MRC-5) in vitro with hydrogen peroxide (100 and 200 µM) for 1 hr and collected data at several time points. To evaluate the persistence of oxidative stress-induced DNA damage up to 24 hrs after treatment, we analysed telomeric and genomic oxidative damage by qPCR and a modified comet assay, respectively. The results demonstrate that the genomic damage is completely repaired, while the telomeric oxidative damage persists. The analysis of telomere length reveals a significant telomere shortening 48 hrs after treatment, leading us to hypothesise that residual telomere damage could be responsible for the telomere shortening observed. Considering the influence of telomere length modulation on genomic stability, we quantified abnormal nuclear morphologies (Nucleoplasmic Bridges, Nuclear Buds and Micronuclei) and observed an increase of chromosome instability in the same time frame as telomere shortening. At subsequent times (72 and 96 hrs), we observed a restoration of telomere length and a reduction of chromosome instability, leaving us to conjecture a correlation between telomere shortening/dysfunction and chromosome instability. We can conclude that oxidative base damage leads to abnormal nuclear morphologies and that telomere dysfunction is an important contributor to this effect.
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Milne E, O'Callaghan N, Ramankutty P, de Klerk NH, Greenop KR, Armstrong BK, Miller M, Fenech M. Plasma micronutrient levels and telomere length in children. Nutrition 2014; 31:331-6. [PMID: 25592011 DOI: 10.1016/j.nut.2014.08.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2014] [Revised: 08/08/2014] [Accepted: 08/15/2014] [Indexed: 01/03/2023]
Abstract
OBJECTIVE Telomeres are long hexamer (TTAGGG) repeats at the ends of chromosomes, and contribute to maintenance of chromosomal stability. Telomere shortening has been linked to cancers and other chronic diseases in adults, although evidence for causal associations is limited. The aim of this study was to determine whether nutritional factors are associated with telomere length (TL) in children. METHODS We conducted a cross-sectional study of nutritional factors and TL in 437 children between 2009 and 2011. Healthy children ages 3, 6, and 9 y provided blood samples, and their parents completed a food frequency questionnaire and a telephone interview about relevant environmental exposures. TL and blood micronutrient levels were measured, and genotyping at 10 loci was undertaken. Associations between the micronutrients and other variables were assessed using linear regression. RESULTS No significant main or interactive effects of age or sex were seen. After adjustment for age, sex, parental education, and month of blood collection, TL was inversely associated with plasma zinc, and shorter in children with the homozygous mutant genotype of the RFC G80A (rs1051266) polymorphism. CONCLUSIONS To the best of our knowledge, this is the first investigation of the association between telomere length and micronutrients in healthy children. The reason for the inverse relationship of TL with zinc is unknown but could be the result of an increase in telomere sequence deletions caused by labile zinc induction of oxidative stress. These findings should be corroborated in other studies before nutritional recommendations might be considered.
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Affiliation(s)
- Elizabeth Milne
- Telethon Kids Institute, University of Western Australia, Perth, Western Australia, Australia.
| | - Nathan O'Callaghan
- Commonwealth Scientific and Industrial Research Organization (CSIRO) Food, Nutrition and Bioproducts Flagship, Adelaide, South Australia, Australia
| | - Padmaja Ramankutty
- Telethon Kids Institute, University of Western Australia, Perth, Western Australia, Australia
| | - Nicholas H de Klerk
- Telethon Kids Institute, University of Western Australia, Perth, Western Australia, Australia
| | - Kathryn R Greenop
- Telethon Kids Institute, University of Western Australia, Perth, Western Australia, Australia
| | - Bruce K Armstrong
- Sydney School of Public Health, University of Sydney, New South Wales, Australia; Sax Institute, Sydney, New South Wales, Australia
| | - Margaret Miller
- Child Health Promotion Research Centre, Edith Cowan University, Perth, Western Australia, Australia
| | - Michael Fenech
- Commonwealth Scientific and Industrial Research Organization (CSIRO) Food, Nutrition and Bioproducts Flagship, Adelaide, South Australia, Australia
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Qiu H, Lee S, Shang Y, Wang WY, Au KF, Kamiya S, Barmada SJ, Finkbeiner S, Lui H, Carlton CE, Tang AA, Oldham MC, Wang H, Shorter J, Filiano AJ, Roberson ED, Tourtellotte WG, Chen B, Tsai LH, Huang EJ. ALS-associated mutation FUS-R521C causes DNA damage and RNA splicing defects. J Clin Invest 2014; 124:981-99. [PMID: 24509083 DOI: 10.1172/jci72723] [Citation(s) in RCA: 194] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Accepted: 11/27/2013] [Indexed: 12/20/2022] Open
Abstract
Autosomal dominant mutations of the RNA/DNA binding protein FUS are linked to familial amyotrophic lateral sclerosis (FALS); however, it is not clear how FUS mutations cause neurodegeneration. Using transgenic mice expressing a common FALS-associated FUS mutation (FUS-R521C mice), we found that mutant FUS proteins formed a stable complex with WT FUS proteins and interfered with the normal interactions between FUS and histone deacetylase 1 (HDAC1). Consequently, FUS-R521C mice exhibited evidence of DNA damage as well as profound dendritic and synaptic phenotypes in brain and spinal cord. To provide insights into these defects, we screened neural genes for nucleotide oxidation and identified brain-derived neurotrophic factor (Bdnf) as a target of FUS-R521C-associated DNA damage and RNA splicing defects in mice. Compared with WT FUS, mutant FUS-R521C proteins formed a more stable complex with Bdnf RNA in electrophoretic mobility shift assays. Stabilization of the FUS/Bdnf RNA complex contributed to Bdnf splicing defects and impaired BDNF signaling through receptor TrkB. Exogenous BDNF only partially restored dendrite phenotype in FUS-R521C neurons, suggesting that BDNF-independent mechanisms may contribute to the defects in these neurons. Indeed, RNA-seq analyses of FUS-R521C spinal cords revealed additional transcription and splicing defects in genes that regulate dendritic growth and synaptic functions. Together, our results provide insight into how gain-of-function FUS mutations affect critical neuronal functions.
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O'Callaghan NJ, Bull C, Fenech M. Elevated plasma magnesium and calcium may be associated with shorter telomeres in older South Australian women. J Nutr Health Aging 2014; 18:131-6. [PMID: 24522463 DOI: 10.1007/s12603-013-0401-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Telomeres are structures that cap the ends of chromosomes. The integrity of the telomere structure and its DNA hexamer (TTAGGG)n repeat sequence is critical for protecting the ends of chromosomes from degradation and in maintaining overall chromosomal stability. Currently, there are limited data on the influence that nutrition has on telomere length. Recent studies have suggested that micronutrients may influence telomere length. Here we examined the relationship between telomere length in lymphocytes and plasma calcium, magnesium, selenium and zinc status in a healthy cohort of younger and older adults. We report a negative association between telomere length and both plasma calcium and magnesium levels, (r=-0.47, P=0.03 and r=-0.61, P=0.001 respectively), in older females; Intriguingly Ca/Mg ratio was positively associated with telomere length (r=0.55, P=0.007). These relationships were not observed in the younger adults, nor in the older males. In conclusion, our study provides preliminary evidence suggesting that levels of plasma magnesium and calcium may impact on telomere length in lymphocytes in older women.
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Affiliation(s)
- N J O'Callaghan
- Nathan J. O'Callaghan, CSIRO Animal, Food and Health Sciences. PO Box 10041, Adelaide, South Australia, AUSTRALIA 5000, nathan.o', Phone: +61 8 8303 8867
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Bull CF, Mayrhofer G, O'Callaghan NJ, Au AY, Pickett HA, Low GKM, Zeegers D, Hande MP, Fenech MF. Folate deficiency induces dysfunctional long and short telomeres; both states are associated with hypomethylation and DNA damage in human WIL2-NS cells. Cancer Prev Res (Phila) 2013; 7:128-38. [PMID: 24253316 DOI: 10.1158/1940-6207.capr-13-0264] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The essential role of dietary micronutrients for genome stability is well documented, yet the effect of folate deficiency or excess on telomeres is not known. Accordingly, human WIL2-NS cells were maintained in medium containing 30, 300, or 3,000 nmol/L folic acid (FA) for 42 days to test the hypothesis that chronic folate deficiency would cause telomere shortening and dysfunction. After 14 days, telomere length (TL) in FA-deficient (30 nmol/L) cultures was 26% longer than that of 3,000 nmol/L FA cultures; however, this was followed by rapid telomere attrition over the subsequent 28 days (P trend, P < 0.0001); both long and short telomere status was positively correlated with biomarkers of chromosome instability (P ≤ 0.003) and mitotic dysfunction (P = 0.01), measured by the cytokinesis-block micronucleus cytome (CBMN-cyt) assay. The early increase in TL was associated with FA-deficiency-induced global DNA hypomethylation (P = 0.05), with an effect size similar to that induced by the DNA methyltransferase inhibitor, 5-aza-2'-deoxycytidine. Quantitative PCR analysis indicated a negative association between FA concentration and uracil incorporation into telomeric DNA (r = -0.47, P = 0.1), suggesting a possible plausible mechanism for uracil as a cause of folate deficiency-induced telomere dysfunction or deletion. Peptide nucleic acid-FISH (PNA-FISH) analysis showed that FA deficiency resulted in 60% of micronuclei containing acentric terminal fragments, an observation consistent with the 3-fold increase in terminal deletions (P = 0.0001). Together, these results demonstrate the impact of folate deficiency on biomarkers of telomere maintenance and integrity, and provide evidence that dysfunctional long telomeres may be as important as critically short telomeres as a cause of chromosomal instability.
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Affiliation(s)
- Caroline F Bull
- CSIRO Animal, Food and Health Sciences, P.O. Box 10041, Adelaide BC, South Australia 5000, Australia. ; and Michael F. Fenech,
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Zhou J, Liu M, Fleming AM, Burrows CJ, Wallace SS. Neil3 and NEIL1 DNA glycosylases remove oxidative damages from quadruplex DNA and exhibit preferences for lesions in the telomeric sequence context. J Biol Chem 2013; 288:27263-27272. [PMID: 23926102 DOI: 10.1074/jbc.m113.479055] [Citation(s) in RCA: 94] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
The telomeric DNA of vertebrates consists of d(TTAGGG)n tandem repeats, which can form quadruplex DNA structures in vitro and likely in vivo. Despite the fact that the G-rich telomeric DNA is susceptible to oxidation, few biochemical studies of base excision repair in telomeric DNA and quadruplex structures have been done. Here, we show that telomeric DNA containing thymine glycol (Tg), 8-oxo-7,8-dihydroguanine (8-oxoG), guanidinohydantoin (Gh), or spiroiminodihydantoin (Sp) can form quadruplex DNA structures in vitro. We have tested the base excision activities of five mammalian DNA glycosylases (NEIL1, NEIL2, mNeil3, NTH1, and OGG1) on these lesion-containing quadruplex substrates and found that only mNeil3 had excision activity on Tg in quadruplex DNA and that the glycosylase exhibited a strong preference for Tg in the telomeric sequence context. Although Sp and Gh in quadruplex DNA were good substrates for mNeil3 and NEIL1, none of the glycosylases had activity on quadruplex DNA containing 8-oxoG. In addition, NEIL1 but not mNeil3 showed enhanced glycosylase activity on Gh in the telomeric sequence context. These data suggest that one role for Neil3 and NEIL1 is to repair DNA base damages in telomeres in vivo and that Neil3 and Neil1 may function in quadruplex-mediated cellular events, such as gene regulation via removal of damaged bases from quadruplex DNA.
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Affiliation(s)
- Jia Zhou
- Department of Microbiology and Molecular Genetics, The Markey Center for Molecular Genetics, The University of Vermont, Burlington, Vermont 05405-0068
| | - Minmin Liu
- Department of Microbiology and Molecular Genetics, The Markey Center for Molecular Genetics, The University of Vermont, Burlington, Vermont 05405-0068
| | - Aaron M Fleming
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112-0850
| | - Cynthia J Burrows
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112-0850
| | - Susan S Wallace
- Department of Microbiology and Molecular Genetics, The Markey Center for Molecular Genetics, The University of Vermont, Burlington, Vermont 05405-0068.
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Vallabhaneni H, O'Callaghan N, Sidorova J, Liu Y. Defective repair of oxidative base lesions by the DNA glycosylase Nth1 associates with multiple telomere defects. PLoS Genet 2013; 9:e1003639. [PMID: 23874233 PMCID: PMC3715427 DOI: 10.1371/journal.pgen.1003639] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2012] [Accepted: 06/03/2013] [Indexed: 02/07/2023] Open
Abstract
Telomeres are chromosome end structures and are essential for maintenance of genome stability. Highly repetitive telomere sequences appear to be susceptible to oxidative stress-induced damage. Oxidation may therefore have a severe impact on telomere integrity and function. A wide spectrum of oxidative pyrimidine-derivatives has been reported, including thymine glycol (Tg), that are primarily removed by a DNA glycosylase, Endonuclease III-like protein 1 (Nth1). Here, we investigate the effect of Nth1 deficiency on telomere integrity in mice. Nth1 null (Nth1(-/-) ) mouse tissues and primary MEFs harbor higher levels of Endonuclease III-sensitive DNA lesions at telomeric repeats, in comparison to a non-telomeric locus. Furthermore, oxidative DNA damage induced by acute exposure to an oxidant is repaired slowly at telomeres in Nth1(-/-) MEFs. Although telomere length is not affected in the hematopoietic tissues of Nth1(-/-) adult mice, telomeres suffer from attrition and increased recombination and DNA damage foci formation in Nth1(-/-) bone marrow cells that are stimulated ex vivo in the presence of 20% oxygen. Nth1 deficiency also enhances telomere fragility in mice. Lastly, in a telomerase null background, Nth1(-/-) bone marrow cells undergo severe telomere loss at some chromosome ends and cell apoptosis upon replicative stress. These results suggest that Nth1 plays an important role in telomere maintenance and base repair against oxidative stress-induced base modifications. The fact that telomerase deficiency can exacerbate telomere shortening in Nth1 deficient mouse cells supports that base excision repair cooperates with telomerase to maintain telomere integrity.
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Affiliation(s)
- Haritha Vallabhaneni
- Laboratory of Molecular Gerontology, National Institute on Aging, National Institutes of Health, Baltimore, Maryland, United States of America
| | | | - Julia Sidorova
- Department of Pathology, University of Washington, Seattle, Washington, United States of America
| | - Yie Liu
- Laboratory of Molecular Gerontology, National Institute on Aging, National Institutes of Health, Baltimore, Maryland, United States of America
- * E-mail:
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Fleming AM, Burrows CJ. G-quadruplex folds of the human telomere sequence alter the site reactivity and reaction pathway of guanine oxidation compared to duplex DNA. Chem Res Toxicol 2013; 26:593-607. [PMID: 23438298 DOI: 10.1021/tx400028y] [Citation(s) in RCA: 122] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Telomere shortening occurs during oxidative and inflammatory stress with guanine (G) as the major site of damage. In this work, a comprehensive profile of the sites of oxidation and structures of products observed from G-quadruplex and duplex structures of the human telomere sequence was studied in the G-quadruplex folds (hybrid (K(+)), basket (Na(+)), and propeller (K(+) + 50% CH3CN)) resulting from the sequence 5'-(TAGGGT)4T-3' and in an appropriate duplex containing one telomere repeat. Oxidations with four oxidant systems consisting of riboflavin photosensitization, carbonate radical generation, singlet oxygen, and the copper Fenton-like reaction were analyzed under conditions of low product conversion to determine relative reactivity. The one-electron oxidants damaged the 5'-G in G-quadruplexes leading to spiroiminodihydantoin (Sp) and 2,2,4-triamino-2H-oxazol-5-one (Z) as major products as well as 8-oxo-7,8-dihydroguanine (OG) and 5-guanidinohydantoin (Gh) in low relative yields, while oxidation in the duplex context produced damage at the 5'- and middle-Gs of GGG sequences and resulted in Gh being the major product. Addition of the reductant N-acetylcysteine (NAC) to the reaction did not alter the riboflavin-mediated damage sites but decreased Z by 2-fold and increased OG by 5-fold, while not altering the hydantoin ratio. However, NAC completely quenched the CO3(•-) reactions. Singlet oxygen oxidations of the G-quadruplex showed reactivity at all Gs on the exterior faces of G-quartets and furnished the product Sp, while no oxidation was observed in the duplex context under these conditions, and addition of NAC had no effect. Because a long telomere sequence would have higher-order structures of G-quadruplexes, studies were also conducted with 5'-(TAGGGT)8-T-3', and it provided oxidation profiles similar to those of the single G-quadruplex. Lastly, Cu(II)/H2O2-mediated oxidations were found to be indiscriminate in the damage patterns, and 5-carboxamido-5-formamido-2-iminohydantoin (2Ih) was found to be a major duplex product, while nearly equal yields of 2Ih and Sp were observed in G-quadruplex contexts. These findings indicate that the nature of the secondary structure of folded DNA greatly alters both the reactivity of G toward oxidative stress as well as the product outcome and suggest that recognition of damage in telomeric sequences by repair enzymes may be profoundly different from that of B-form duplex DNA.
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Affiliation(s)
- Aaron M Fleming
- Department of Chemistry, University of Utah , 315 South 1400 East, Salt Lake City, Utah 84112-0850, United States
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