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Ramos Jesus F, Correia Passos F, Miranda Lopes Falcão M, Vincenzo Sarno Filho M, Neves da Silva IL, Santiago Moraes AC, Lima Costa Neves MC, Baccan GC. Immunosenescence and Inflammation in Chronic Obstructive Pulmonary Disease: A Systematic Review. J Clin Med 2024; 13:3449. [PMID: 38929978 PMCID: PMC11205253 DOI: 10.3390/jcm13123449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2024] [Revised: 05/28/2024] [Accepted: 05/31/2024] [Indexed: 06/28/2024] Open
Abstract
Background/Objectives: Chronic Obstructive Pulmonary Disease (COPD) is a disease of premature aging, characterized by airflow limitations in the lungs and systemic chronic inflammation. This systematic review aimed to provide a systematic overview of immunosenescence and inflammation in Chronic Obstructive Pulmonary Disease (COPD). Methods: The PubMed, Science Direct, Scopus, Cochrane Library, and Web of Science databases were searched for studies on markers of immunosenescence. Observational studies comparing patients with COPD to individuals without disease were evaluated, considering the following markers: inflammation and senescence in COPD, naïve, memory, and CD28null T cells, and telomere length in leukocytes. Results: A total of 15 studies were included, eight of which were rated as high quality. IL-6 production, telomere shortening, and the higher frequencies of CD28null T cells were more prominent findings in the COPD studies analyzed. Despite lung function severity being commonly investigated in the included studies, the importance of this clinical marker to immunosenescence remains inconclusive. Conclusions: The findings of this systematic review confirmed the presence of accelerated immunosenescence, in addition to systemic inflammation, in stable COPD patients. Further studies are necessary to more comprehensively evaluate the impact of immunosenescence on lung function in COPD.
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Affiliation(s)
- Fabíola Ramos Jesus
- Maternidade Climério de Oliveira (MCO/EBSERH), Universidade Federal da Bahia, Salvador 40055-150, Bahia, Brazil;
- Departamento de Bioquímica e Biofísica, Instituto de Ciências da Saúde, Universidade Federal da Bahia, Salvador 40110-110, Bahia, Brazil
| | - Fabine Correia Passos
- Departamento de Bioquímica e Biofísica, Instituto de Ciências da Saúde, Universidade Federal da Bahia, Salvador 40110-110, Bahia, Brazil
| | - Michelle Miranda Lopes Falcão
- Departamento de Saúde, Universidade Estadual de Feira de Santana, Avenida Transnordestina, s/n—Novo Horizonte, Feira de Santana 44036-900, Bahia, Brazil
| | - Marcelo Vincenzo Sarno Filho
- Unidade do Sistema Respiratório, Ambulatório Professor Francisco Magalhães Neto-Hospital Universitário Professor Edgard Santos, Universidade Federal da Bahia, Salvador 40110-200, Bahia, Brazil
| | - Ingrid Lorena Neves da Silva
- Departamento de Bioquímica e Biofísica, Instituto de Ciências da Saúde, Universidade Federal da Bahia, Salvador 40110-110, Bahia, Brazil
| | - Anna Clara Santiago Moraes
- Departamento de Bioquímica e Biofísica, Instituto de Ciências da Saúde, Universidade Federal da Bahia, Salvador 40110-110, Bahia, Brazil
| | - Margarida Célia Lima Costa Neves
- Unidade do Sistema Respiratório, Ambulatório Professor Francisco Magalhães Neto-Hospital Universitário Professor Edgard Santos, Universidade Federal da Bahia, Salvador 40110-200, Bahia, Brazil
| | - Gyselle Chrystina Baccan
- Departamento de Bioquímica e Biofísica, Instituto de Ciências da Saúde, Universidade Federal da Bahia, Salvador 40110-110, Bahia, Brazil
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2
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Sun C, Bai S, Liang Y, Liu D, Liao J, Chen Y, Zhao X, Wu B, Huang D, Chen M, Wu D. The role of Sirtuin 1 and its activators in age-related lung disease. Biomed Pharmacother 2023; 162:114573. [PMID: 37018986 DOI: 10.1016/j.biopha.2023.114573] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 03/10/2023] [Accepted: 03/21/2023] [Indexed: 04/05/2023] Open
Abstract
Aging is a major driving factor in lung diseases. Age-related lung disease is associated with downregulated expression of SIRT1, an NAD+-dependent deacetylase that regulates inflammation and stress resistance. SIRT1 acts by inducing the deacetylation of various substrates and regulates several mechanisms that relate to lung aging, such as genomic instability, lung stem cell exhaustion, mitochondrial dysfunction, telomere shortening, and immune senescence. Chinese herbal medicines have many biological activities, exerting anti-inflammatory, anti-oxidation, anti-tumor, and immune regulatory effects. Recent studies have confirmed that many Chinese herbs have the effect of activating SIRT1. Therefore, we reviewed the mechanism of SIRT1 in age-related lung disease and explored the potential roles of Chinese herbs as SIRT1 activators in the treatment of age-related lung disease.
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3
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Zhang K, Wang L, Hong X, Chen H, Shi Y, Liu Y, Liu J, Liu JP. Pulmonary Alveolar Stem Cell Senescence, Apoptosis, and Differentiation by p53-Dependent and -Independent Mechanisms in Telomerase-Deficient Mice. Cells 2021; 10:2892. [PMID: 34831112 PMCID: PMC8616483 DOI: 10.3390/cells10112892] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 10/10/2021] [Accepted: 10/21/2021] [Indexed: 12/20/2022] Open
Abstract
Pulmonary premature ageing and fibrogenesis as in idiopathic pulmonary fibrosis (IPF) occur with the DNA damage response in lungs deficient of telomerase. The molecular mechanism mediating pulmonary alveolar cell fates remains to be investigated. The present study shows that naturally occurring ageing is associated with the DNA damage response (DDR) and activation of the p53 signalling pathway. Telomerase deficiency induced by telomerase RNA component (TERC) knockout (KO) accelerates not only replicative senescence but also altered differentiation and apoptosis of the pulmonary alveolar stem cells (AEC2) in association with increased innate immune natural killer (NK) cells in TERC KO mice. TERC KO results in increased senescence-associated heterochromatin foci (SAHF) marker HP1γ, p21, p16, and apoptosis-associated cleaved caspase-3 in AEC2. However, additional deficiency of the tumour suppressor p53 in the Trp53-/- allele of the late generation of TERC KO mice attenuates the increased senescent and apoptotic markers significantly. Moreover, p53 deficiency has no significant effect on the increased gene expression of T1α (a marker of terminal differentiated AEC1) in AEC2 of the late generation of TERC KO mice. These findings demonstrate that, in natural ageing or premature ageing accelerated by telomere shortening, pulmonary senescence and IPF develop with alveolar stem cell p53-dependent premature replicative senescence, apoptosis, and p53-independent differentiation, resulting in pulmonary senescence-associated low-grade inflammation (SALI). Our studies indicate a natural ageing-associated molecular mechanism of telomerase deficiency-induced telomere DDR and SALI in pulmonary ageing and IPF.
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Affiliation(s)
- Kexiong Zhang
- Institute of Ageing Research, Hangzhou Normal University School of Basic Medical Sciences, Hangzhou 311121, China; (L.W.); (X.H.); (H.C.); (Y.S.); (Y.L.); (J.L.)
| | - Lihui Wang
- Institute of Ageing Research, Hangzhou Normal University School of Basic Medical Sciences, Hangzhou 311121, China; (L.W.); (X.H.); (H.C.); (Y.S.); (Y.L.); (J.L.)
| | - Xiaojing Hong
- Institute of Ageing Research, Hangzhou Normal University School of Basic Medical Sciences, Hangzhou 311121, China; (L.W.); (X.H.); (H.C.); (Y.S.); (Y.L.); (J.L.)
| | - Hao Chen
- Institute of Ageing Research, Hangzhou Normal University School of Basic Medical Sciences, Hangzhou 311121, China; (L.W.); (X.H.); (H.C.); (Y.S.); (Y.L.); (J.L.)
| | - Yao Shi
- Institute of Ageing Research, Hangzhou Normal University School of Basic Medical Sciences, Hangzhou 311121, China; (L.W.); (X.H.); (H.C.); (Y.S.); (Y.L.); (J.L.)
| | - Yingying Liu
- Institute of Ageing Research, Hangzhou Normal University School of Basic Medical Sciences, Hangzhou 311121, China; (L.W.); (X.H.); (H.C.); (Y.S.); (Y.L.); (J.L.)
| | - Jun Liu
- Institute of Ageing Research, Hangzhou Normal University School of Basic Medical Sciences, Hangzhou 311121, China; (L.W.); (X.H.); (H.C.); (Y.S.); (Y.L.); (J.L.)
| | - Jun-Ping Liu
- Institute of Ageing Research, Hangzhou Normal University School of Basic Medical Sciences, Hangzhou 311121, China; (L.W.); (X.H.); (H.C.); (Y.S.); (Y.L.); (J.L.)
- Hudson Institute of Medical Research and Monash University Department of Molecular and Translational Science, Clayton, VIC 3168, Australia
- Department of Immunology and Pathology, Monash University Faculty of Medicine, Prahran, VIC 3181, Australia
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4
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Analysis of potential genetic biomarkers and molecular mechanism of smoking-related postmenopausal osteoporosis using weighted gene co-expression network analysis and machine learning. PLoS One 2021; 16:e0257343. [PMID: 34555052 PMCID: PMC8459994 DOI: 10.1371/journal.pone.0257343] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Accepted: 08/29/2021] [Indexed: 12/25/2022] Open
Abstract
OBJECTIVES Smoking is a significant independent risk factor for postmenopausal osteoporosis, leading to genome variations in postmenopausal smokers. This study investigates potential biomarkers and molecular mechanisms of smoking-related postmenopausal osteoporosis (SRPO). MATERIALS AND METHODS The GSE13850 microarray dataset was downloaded from Gene Expression Omnibus (GEO). Gene modules associated with SRPO were identified using weighted gene co-expression network analysis (WGCNA), protein-protein interaction (PPI) analysis, and pathway and functional enrichment analyses. Feature genes were selected using two machine learning methods: support vector machine-recursive feature elimination (SVM-RFE) and random forest (RF). The diagnostic efficiency of the selected genes was assessed by gene expression analysis and receiver operating characteristic curve. RESULTS Eight highly conserved modules were detected in the WGCNA network, and the genes in the module that was strongly correlated with SRPO were used for constructing the PPI network. A total of 113 hub genes were identified in the core network using topological network analysis. Enrichment analysis results showed that hub genes were closely associated with the regulation of RNA transcription and translation, ATPase activity, and immune-related signaling. Six genes (HNRNPC, PFDN2, PSMC5, RPS16, TCEB2, and UBE2V2) were selected as genetic biomarkers for SRPO by integrating the feature selection of SVM-RFE and RF. CONCLUSION The present study identified potential genetic biomarkers and provided a novel insight into the underlying molecular mechanism of SRPO.
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Beghé B, Cerri S, Fabbri LM, Marchioni A. COPD, Pulmonary Fibrosis and ILAs in Aging Smokers: The Paradox of Striking Different Responses to the Major Risk Factors. Int J Mol Sci 2021; 22:ijms22179292. [PMID: 34502194 PMCID: PMC8430914 DOI: 10.3390/ijms22179292] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 08/25/2021] [Accepted: 08/25/2021] [Indexed: 01/19/2023] Open
Abstract
Aging and smoking are associated with the progressive development of three main pulmonary diseases: chronic obstructive pulmonary disease (COPD), interstitial lung abnormalities (ILAs), and idiopathic pulmonary fibrosis (IPF). All three manifest mainly after the age of 60 years, but with different natural histories and prevalence: COPD prevalence increases with age to >40%, ILA prevalence is 8%, and IPF, a rare disease, is 0.0005–0.002%. While COPD and ILAs may be associated with gradual progression and mortality, the natural history of IPF remains obscure, with a worse prognosis and life expectancy of 2–5 years from diagnosis. Acute exacerbations are significant events in both COPD and IPF, with a much worse prognosis in IPF. This perspective discusses the paradox of the striking pathological and pathophysiologic responses on the background of the same main risk factors, aging and smoking, suggesting two distinct pathophysiologic processes for COPD and ILAs on one side and IPF on the other side. Pathologically, COPD is characterized by small airways fibrosis and remodeling, with the destruction of the lung parenchyma. By contrast, IPF almost exclusively affects the lung parenchyma and interstitium. ILAs are a heterogenous group of diseases, a minority of which present with the alveolar and interstitial abnormalities of interstitial lung disease.
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Affiliation(s)
- Bianca Beghé
- Respiratory Diseases Unit, University Hospital of Modena, 41124 Modena, Italy; (S.C.); (A.M.)
- Correspondence:
| | - Stefania Cerri
- Respiratory Diseases Unit, University Hospital of Modena, 41124 Modena, Italy; (S.C.); (A.M.)
| | - Leonardo M. Fabbri
- Department of Translational Medicine and Romagna, University of Ferrara, 44121 Ferrara, Italy;
| | - Alessandro Marchioni
- Respiratory Diseases Unit, University Hospital of Modena, 41124 Modena, Italy; (S.C.); (A.M.)
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6
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Skerrett-Byrne DA, Bromfield EG, Murray HC, Jamaluddin MFB, Jarnicki AG, Fricker M, Essilfie AT, Jones B, Haw TJ, Hampsey D, Anderson AL, Nixon B, Scott RJ, Wark PAB, Dun MD, Hansbro PM. Time-resolved proteomic profiling of cigarette smoke-induced experimental chronic obstructive pulmonary disease. Respirology 2021; 26:960-973. [PMID: 34224176 DOI: 10.1111/resp.14111] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 05/01/2021] [Accepted: 06/14/2021] [Indexed: 12/13/2022]
Abstract
BACKGROUND AND OBJECTIVE Chronic obstructive pulmonary disease (COPD) is the third leading cause of illness and death worldwide. Current treatments aim to control symptoms with none able to reverse disease or stop its progression. We explored the major molecular changes in COPD pathogenesis. METHODS We employed quantitative label-based proteomics to map the changes in the lung tissue proteome of cigarette smoke-induced experimental COPD that is induced over 8 weeks and progresses over 12 weeks. RESULTS Quantification of 7324 proteins enabled the tracking of changes to the proteome. Alterations in protein expression profiles occurred in the induction phase, with 18 and 16 protein changes at 4- and 6-week time points, compared to age-matched controls, respectively. Strikingly, 269 proteins had altered expression after 8 weeks when the hallmark pathological features of human COPD emerge, but this dropped to 27 changes at 12 weeks with disease progression. Differentially expressed proteins were validated using other mouse and human COPD bronchial biopsy samples. Major changes in RNA biosynthesis (heterogeneous nuclear ribonucleoproteins C1/C2 [HNRNPC] and RNA-binding protein Musashi homologue 2 [MSI2]) and modulators of inflammatory responses (S100A1) were notable. Mitochondrial dysfunction and changes in oxidative stress proteins also occurred. CONCLUSION We provide a detailed proteomic profile, identifying proteins associated with the pathogenesis and disease progression of COPD establishing a platform to develop effective new treatment strategies.
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Affiliation(s)
- David A Skerrett-Byrne
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, Newcastle, New South Wales, Australia.,Pregnancy and Reproduction Program, Hunter Medical Research Institute, Newcastle, New South Wales, Australia.,University of Newcastle, Callaghan, New South Wales, Australia
| | - Elizabeth G Bromfield
- Pregnancy and Reproduction Program, Hunter Medical Research Institute, Newcastle, New South Wales, Australia.,University of Newcastle, Callaghan, New South Wales, Australia.,Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Heather C Murray
- University of Newcastle, Callaghan, New South Wales, Australia.,Cancer Research Program, Hunter Medical Research Institute, Newcastle, New South Wales, Australia
| | - M Fairuz B Jamaluddin
- University of Newcastle, Callaghan, New South Wales, Australia.,Cancer Research Program, Hunter Medical Research Institute, Newcastle, New South Wales, Australia
| | - Andrew G Jarnicki
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, Newcastle, New South Wales, Australia.,Department of Pharmacology and Therapeutics, University of Melbourne, Parkville, Victoria, Australia
| | - Michael Fricker
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, Newcastle, New South Wales, Australia.,University of Newcastle, Callaghan, New South Wales, Australia
| | - Ama T Essilfie
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, Newcastle, New South Wales, Australia.,Queensland Institute of Medical Research, Herston, Queensland, Australia
| | - Bernadette Jones
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, Newcastle, New South Wales, Australia.,University of Newcastle, Callaghan, New South Wales, Australia
| | - Tatt J Haw
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, Newcastle, New South Wales, Australia.,University of Newcastle, Callaghan, New South Wales, Australia
| | - Daniel Hampsey
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, Newcastle, New South Wales, Australia.,University of Newcastle, Callaghan, New South Wales, Australia
| | - Amanda L Anderson
- Pregnancy and Reproduction Program, Hunter Medical Research Institute, Newcastle, New South Wales, Australia.,University of Newcastle, Callaghan, New South Wales, Australia
| | - Brett Nixon
- Pregnancy and Reproduction Program, Hunter Medical Research Institute, Newcastle, New South Wales, Australia.,University of Newcastle, Callaghan, New South Wales, Australia
| | - Rodney J Scott
- University of Newcastle, Callaghan, New South Wales, Australia.,Cancer Research Program, Hunter Medical Research Institute, Newcastle, New South Wales, Australia
| | - Peter A B Wark
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, Newcastle, New South Wales, Australia.,University of Newcastle, Callaghan, New South Wales, Australia
| | - Matthew D Dun
- University of Newcastle, Callaghan, New South Wales, Australia.,Cancer Research Program, Hunter Medical Research Institute, Newcastle, New South Wales, Australia
| | - Philip M Hansbro
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, Newcastle, New South Wales, Australia.,University of Newcastle, Callaghan, New South Wales, Australia.,Centre for Inflammation, Centenary Institute and University of Technology Sydney, Sydney, New South Wales, Australia
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7
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Fernandes JR, Pinto TNC, Piemonte LL, Arruda LB, Marques da Silva CCB, F Carvalho CR, Pinto RMC, S Duarte AJ, Benard G. Long-term tobacco exposure and immunosenescence: Paradoxical effects on T-cells telomere length and telomerase activity. Mech Ageing Dev 2021; 197:111501. [PMID: 34000259 DOI: 10.1016/j.mad.2021.111501] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 04/27/2021] [Accepted: 05/12/2021] [Indexed: 12/29/2022]
Abstract
Immunosenescence are alterations on immune system that occurs throughout an individual life. The main characteristic of this process is replicative senescence, evaluated by telomere shortening. Several factors implicate on telomere shortening, such as smoking. In this study, we evaluated the influence of smoking and Chronic Obstructive Pulmonary Disease (COPD) on cytokines, telomere length and telomerase activity. Blood samples were collected from subjects aged over 60 years old: Healthy (never smokers), Smokers (smoking for over 30 years) and COPDs (ex-smokers for ≥15 years). A young group was included as control. PBMCs were cultured for assessment of telomerase activity using RT-PCR, and cytokines secretion flow cytometry. CD4+ and CD8+ purified lymphocytes were used to assess telomere length using FlowFISH. We observed that COPD patients have accelerated telomere shortening. Paradoxically, smokers without lung damage showed preserved telomere length, suggesting that tobacco smoking may affect regulatory mechanisms, such as telomerase. Telomerase activity showed diminished activity in COPDs, while Smokers showed increased activity compared to COPDs and Healthy groups. Extracellular environment reflected this unbalance, indicated by an anti-inflammatory profile in Smokers, while COPDs showed an inflammatory prone profile. Further studies focusing on telomeric maintenance may unveil mechanisms that are associated with cancer under long-term smoking.
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Affiliation(s)
- Juliana Ruiz Fernandes
- Laboratory of Dermatology and Immunodeficiencies (LIM56), School of Medicine, São Paulo University, Av. Dr. Arnaldo, 455, São Paulo, Brazil
| | - Thalyta Nery Carvalho Pinto
- Laboratory of Dermatology and Immunodeficiencies (LIM56), School of Medicine, São Paulo University, Av. Dr. Arnaldo, 455, São Paulo, Brazil
| | - Lucas Lopes Piemonte
- Permanent Education School, School of Medicine, São Paulo University, Av. Dr Ovidio Pires de Campo, 471, São Paulo, Brazil
| | - Liã Barbara Arruda
- Center for Clinical Microbiology, Division of Infection and Immunity, University College London, Royal Free Hospital Campus, London, United Kingdom
| | | | - Celso R F Carvalho
- Department of Physical Therapy, School of Medicine, São Paulo University, R. Dr. Ovídio Pires de Campos, 255, São Paulo, Brazil
| | - Regina Maria Carvalho Pinto
- Pulmonary Department, Heart Institute (InCor), School of Medicine, São Paulo University, Av. Dr. Enéas de Carvalho Aguiar, 44, São Paulo, Brazil
| | - Alberto J S Duarte
- Laboratory of Dermatology and Immunodeficiencies (LIM56), School of Medicine, São Paulo University, Av. Dr. Arnaldo, 455, São Paulo, Brazil
| | - Gil Benard
- Laboratory of Dermatology and Immunodeficiencies (LIM56), School of Medicine, São Paulo University, Av. Dr. Arnaldo, 455, São Paulo, Brazil.
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8
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Moon DH, Kim J, Lim MN, Bak SH, Kim WJ. Correlation between Telomere Length and Chronic Obstructive Pulmonary Disease-Related Phenotypes: Results from the Chronic Obstructive Pulmonary Disease in Dusty Areas (CODA) Cohort. Tuberc Respir Dis (Seoul) 2021; 84:188-199. [PMID: 33979985 PMCID: PMC8273013 DOI: 10.4046/trd.2021.0015] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Accepted: 05/12/2021] [Indexed: 12/13/2022] Open
Abstract
Background Chronic obstructive pulmonary disease (COPD) is a common chronic respiratory disease with increased prevalence in the elderly. Telomeres are repetitive DNA sequences found at the end of the chromosome, which progressively shorten as cells divide. Telomere length is known to be a molecular marker of aging. This study aimed to assess the relationship between telomere length and the risk of COPD, lung function, respiratory symptoms, and emphysema index in Chronic Obstructive Pulmonary Disease in Dusty Areas (CODA) cohort. Methods We extracted DNA from the peripheral blood samples of 446 participants, including 285 COPD patients and 161 control participants. We measured absolute telomere length using quantitative real-time polymerase chain reaction. All participants underwent spirometry and quantitative computed tomography scan. Questionnaires assessing respiratory symptoms and the COPD Assessment Test was filled by all the participants. Results The mean age of participants at the baseline visit was 72.5±7.1 years. Males accounted for 72% (321 participants) of the all participants. The mean telomere length was lower in the COPD group compared to the non-COPD group (COPD, 16.81±13.90 kb; non-COPD, 21.97±14.43 kb). In COPD patients, 112 (75.7%) were distributed as tertile 1 (shortest), 91 (61.1%) as tertile 2 and 82 (55%) as tertile 3 (longest). We did not find significant associations between telomere length and lung function, exacerbation, airway wall thickness, and emphysema index after adjusting for sex, age, and smoking status. Conclusion In this study, the relationship between various COPD phenotypes and telomere length was analyzed, but no significant statistical associations were shown.
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Affiliation(s)
- Da Hye Moon
- Department of Internal Medicine, Kangwon National University Hospital, Chuncheon, Republic of Korea
| | - Jeeyoung Kim
- Department of Internal Medicine and Environmental Health Center, Kangwon National University School of Medicine, Chuncheon, Republic of Korea
| | - Myoung Nam Lim
- Biomedical Research Institute, Kangwon National University, Chuncheon, Republic of Korea
| | - So Hyen Bak
- Department of Radiology, Kangwon National University Hospital, Kangwon National University of School of Medicine, Chuncheon, Republic of Korea
| | - Woo Jin Kim
- Department of Internal Medicine, Kangwon National University Hospital, Chuncheon, Republic of Korea.,Department of Internal Medicine and Environmental Health Center, Kangwon National University School of Medicine, Chuncheon Republic of Korea
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9
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Fermont JM, Mohan D, Fisk M, Bolton CE, Macnee W, Cockcroft JR, McEniery C, Fuld J, Cheriyan J, Tal-Singer R, Müllerova H, Wood AM, Wilkinson IB, Polkey MI. Short physical performance battery as a practical tool to assess mortality risk in chronic obstructive pulmonary disease. Age Ageing 2021; 50:795-801. [PMID: 32894757 PMCID: PMC8098797 DOI: 10.1093/ageing/afaa138] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Indexed: 12/21/2022] Open
Abstract
RATIONALE chronic obstructive pulmonary disease (COPD) is a leading cause of mortality and common in older adults. The BODE Index is the most recognised mortality risk score in COPD but includes a 6-minute walk test (6MWT) that is seldom available in practise; the BODE Index may be better adopted if the 6MWT was replaced. OBJECTIVES we investigated whether a modified BODE Index in which 6MWT was replaced by an alternative measure of physical capacity, specifically the short physical performance battery (SPPB) or components, retained its predictive ability for mortality in individuals with COPD. METHODS we analysed 630 COPD patients from the ERICA cohort study for whom UK Office for National Statistics verified mortality data were available. Variables tested at baseline included spirometry, 6MWT, SPPB and its components (4-m gait speed test [4MGS], chair stand and balance). Predictive models were developed using stratified multivariable Cox regression, and assessed by C-indices and calibration plots with 10-fold cross-validation and replication. RESULTS during median 2 years of follow-up, 60 (10%) individuals died. There was no significant difference between the discriminative ability of BODE6MWT (C-index 0.709, 95% confidence interval [CI], 0.680-0.737), BODESPPB (C-index 0.683, 95% CI, 0.647-0.712), BODE4MGS (C-index 0.676, 95% CI, 0.643-0.700) and BODEBALANCE (C-index 0.686, 95% CI, 0.651-0.713) for predicting mortality. CONCLUSIONS the SPPB, and its 4MGS and balance components, can potentially be used as an alternative to the 6MWT in the BODE Index without significant loss of predictive ability in all-cause mortality.
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Affiliation(s)
- Jilles M Fermont
- Division of Experimental Medicine and Immunotherapeutics, Department of Medicine, University of Cambridge, Cambridge, UK
- British Heart Foundation Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
| | - Divya Mohan
- Medical Innovation, Value Evidence and Outcomes, GSK, Collegeville, PA, USA
| | - Marie Fisk
- Division of Experimental Medicine and Immunotherapeutics, Department of Medicine, University of Cambridge, Cambridge, UK
| | - Charlotte E Bolton
- Division of Respiratory Medicine and NIHR Nottingham BRC Respiratory Theme, University of Nottingham, Nottingham, UK
| | - William Macnee
- Centre for Inflammation Research, Queen’s Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - John R Cockcroft
- Department of Cardiology, Columbia University Medical Centre, New York, NY, USA
| | - Carmel McEniery
- Division of Experimental Medicine and Immunotherapeutics, Department of Medicine, University of Cambridge, Cambridge, UK
| | - Jonathan Fuld
- Department of Respiratory Medicine, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | - Joseph Cheriyan
- Division of Experimental Medicine and Immunotherapeutics, Department of Medicine, University of Cambridge, Cambridge, UK
| | - Ruth Tal-Singer
- Medical Innovation, Value Evidence and Outcomes, GSK, Collegeville, PA, USA
| | | | - Angela M Wood
- British Heart Foundation Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
- British Heart Foundation Centre of Research Excellence, University of Cambridge, Cambridge, UK
- National Institute for Health Research Blood and Transplant Research Unit in Donor Health and Genomics, University of Cambridge, Cambridge, UK
- National Institute for Health Research Cambridge Biomedical Research Centre, University of Cambridge and Cambridge University Hospitals, Cambridge, UK
- Health Data Research UK Cambridge, Wellcome Genome Campus and University of Cambridge, Cambridge, UK
| | - Ian B Wilkinson
- Division of Experimental Medicine and Immunotherapeutics, Department of Medicine, University of Cambridge, Cambridge, UK
- Cambridge Clinical Trials Unit, Cambridge University Hospitals NHS Foundation Trust, Addenbrooke’s Hospital, Cambridge, UK
| | - Michael I Polkey
- Department of Respiratory Medicine, Royal Brompton Hospital, London, UK
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10
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Zhang K, Wang L, Chen H, Shi Y, Liu Y, Liu J, Hong X, Liu JP. Pulmonary alveolar stem cells undergo senescence, apoptosis and differentiation by p53-dependent and -independent mechanisms in telomerase deficient mice. Clin Exp Pharmacol Physiol 2021; 48:651-659. [PMID: 33634502 DOI: 10.1111/1440-1681.13472] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 01/14/2021] [Accepted: 01/14/2021] [Indexed: 12/16/2022]
Abstract
Pulmonary senescence and fibrosis occur with deoxyribonucleic acid (DNA) damage response in the lungs deficient of telomerase. The molecular mechanism mediating pulmonary alveolar cell fates remains to be investigated. The present study shows that pulmonary alveolar epithelial type 2 cells (AEC2) (alveolar stem cells) undergo not only replicative senescence, but also apoptosis and differentiation in association with increased innate immune natural killer (NK) cells in telomerase knockout (KO) mice. Telomerase ribonucleic acid (RNA) component (TERC) deficiency results in increased senescence-associated heterochromatin foci marker HP1γ, p21, p16 and apoptosis-associated cleaved caspase-3 in AEC2. However, p53 deficiency in the Trp53-/- allele of the late generation of TERC KO mice attenuates the increased senescent and apoptotic markers significantly. Moreover, p53 deficiency has no significant effect on the increased gene expression of T1α (a marker of terminal differentiated alveolar epithelial type 1 cells [AEC1]) in AEC2 of the late generation of TERC KO mice. Collectively, our findings suggest that pulmonary senescence takes place in deficiency of telomerase RNA component with the alveolar stem cells undergoing p53-dependent senescence and apoptosis as well as p53-independent differentiation.
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Affiliation(s)
- Kexiong Zhang
- Institute of Ageing Research, Hangzhou Normal University School of Medicine, Hangzhou, China
| | - Lihui Wang
- Institute of Ageing Research, Hangzhou Normal University School of Medicine, Hangzhou, China
| | - Hao Chen
- Institute of Ageing Research, Hangzhou Normal University School of Medicine, Hangzhou, China
| | - Yao Shi
- Institute of Ageing Research, Hangzhou Normal University School of Medicine, Hangzhou, China
| | - Yingying Liu
- Institute of Ageing Research, Hangzhou Normal University School of Medicine, Hangzhou, China
| | - Jun Liu
- Institute of Ageing Research, Hangzhou Normal University School of Medicine, Hangzhou, China
| | - Xiaojing Hong
- Institute of Ageing Research, Hangzhou Normal University School of Medicine, Hangzhou, China
| | - Jun-Ping Liu
- Institute of Ageing Research, Hangzhou Normal University School of Medicine, Hangzhou, China
- Department of Molecular and Translational Science, Hudson Institute of Medical Research and Monash University, Clayton, Victoria, Australia
- Department of Immunology, Monash University Faculty of Medicine, Prahran, Victoria, Australia
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11
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Koloko Ngassie ML, Brandsma CA, Gosens R, Prakash YS, Burgess JK. The Stress of Lung Aging: Endoplasmic Reticulum and Senescence Tête-à-Tête. Physiology (Bethesda) 2021; 36:150-159. [PMID: 33904785 DOI: 10.1152/physiol.00039.2020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Beyond the structural changes, features including the dysregulation of endoplasmic reticulum (ER) stress response and increased senescence characterize the lung aging. ER stress response and senescence have been reported to be induced by factors like cigarette smoke. Therefore, deciphering the mechanisms underlying ER and senescent pathways interaction has become a challenge. In this review we highlight the known and unknown regarding ER stress response and senescence and their cross talk in aged lung.
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Affiliation(s)
- M L Koloko Ngassie
- University of Groningen, University Medical Center Groningen, Department of Pathology and Medical Biology; University of Groningen, University Medical Center Groningen, Groningen Research Institute for Asthma and COPD, Groningen, The Netherlands
| | - C A Brandsma
- University of Groningen, University Medical Center Groningen, Department of Pathology and Medical Biology; University of Groningen, University Medical Center Groningen, Groningen Research Institute for Asthma and COPD, Groningen, The Netherlands
| | - R Gosens
- University of Groningen, University Medical Center Groningen, Groningen Research Institute for Asthma and COPD; University of Groningen, Department of Molecular Pharmacology, Groningen, The Netherlands
| | - Y S Prakash
- Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, Rochester, Minnesota
| | - J K Burgess
- University of Groningen, University Medical Center Groningen, Department of Pathology and Medical Biology; University of Groningen, University Medical Center Groningen, Groningen Research Institute for Asthma and COPD, Groningen, The Netherlands
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12
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Mild catalytic defects of tert rs61748181 polymorphism affect the clinical presentation of chronic obstructive pulmonary disease. Sci Rep 2021; 11:4333. [PMID: 33619289 PMCID: PMC7900122 DOI: 10.1038/s41598-021-83686-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Accepted: 02/03/2021] [Indexed: 11/29/2022] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is a disorder of accelerated lung aging. Multiple pieces of evidence support that the aging biomarker short telomeres, which can be caused by mutations in telomerase reverse transcriptase (TERT), contribute to COPD pathogenesis. We hypothesized that short telomere risk-associated single nucleotide polymorphisms (SNPs) in TERT, while not able to drive COPD development, nonetheless modify the disease presentation. We set out to test the SNP carrying status in a longitudinal study of smokers with COPD and found that rapid decline of FEV1 in lung function was associated with the minor allele of rs61748181 (adjusted odds ratio 2.49, p = 0.038). Biochemical evaluation of ex vivo engineered human cell models revealed that primary cells expressing the minor allele of rs61748181 had suboptimal telomere length maintenance due to reduced telomerase catalytic activity, despite having comparable cell growth kinetics as WT-TERT expressing cells. This ex vivo observation translated clinically in that shorter telomeres were found in minor allele carriers in a sub-population of COPD patients with non-declining lung function, over the 5-year period of the longitudinal study. Collectively, our data suggest that functional TERT SNPs with mild catalytic defects are nonetheless implicated in the clinical presentation of COPD.
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13
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Córdoba-Lanús E, Cazorla-Rivero S, García-Bello MA, Mayato D, Gonzalvo F, Ayra-Plasencia J, Celli B, Casanova C. Telomere length dynamics over 10-years and related outcomes in patients with COPD. Respir Res 2021; 22:56. [PMID: 33608013 PMCID: PMC7896411 DOI: 10.1186/s12931-021-01616-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Accepted: 01/06/2021] [Indexed: 12/25/2022] Open
Abstract
Background Chronic obstructive pulmonary disease (COPD) has been proposed as a disease of accelerated aging. Several cross-sectional studies have related a shorter telomere length (TL), a marker of biological aging, with COPD outcomes. Whether accelerated telomere shortening over time relates to worse outcomes in COPD patients, is not known. Methods Relative telomere length (T/S) was determined by qPCR in DNA samples from peripheral blood in 263 patients at baseline and up to 10 years post enrolment. Yearly clinical and lung function data of 134 patients with at least two-time measures of T/S over this time were included in the analysis. Results At baseline, T/S inversely correlated with age (r = − 0.236; p < 0.001), but there was no relationship between T/S and clinical and lung function variables (p > 0.05). Over 10 years of observation, there was a median shortening of TL of 183 bp/year for COPD patients. After adjusting for age, gender, active smoking and mean T/S, patients that shortened their telomeres the most over time, had worse gas exchange, more lung hyperinflation and extrapulmonary affection during the follow-up, (PaO2 p < 0.0001; KCO p = 0.042; IC/TLC p < 0.0001; 6MWD p = 0.004 and BODE index p = 0.009). Patients in the lowest tertile of T/S through the follow-up period had an increased risk of death [HR = 5.48, (1.23–24.42) p = 0.026]. Conclusions This prospective study shows an association between accelerated telomere shortening and progressive worsening of pulmonary gas exchange, lung hyperinflation and extrapulmonary affection in COPD patients. Moreover, persistently shorter telomeres over this observation time increase the risk for all-cause mortality.
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Affiliation(s)
- E Córdoba-Lanús
- Research Unit, Hospital Universitario Nuestra Señora de Candelaria, Santa Cruz de Tenerife, Spain. .,University of La Laguna, San Cristóbal de La Laguna, Tenerife, Spain. .,Instituto Universitario de Enfermedades Tropicales Y Salud Pública de Canarias (IUETSPC), Tenerife, Spain.
| | - S Cazorla-Rivero
- Research Unit, Hospital Universitario Nuestra Señora de Candelaria, Santa Cruz de Tenerife, Spain.,University of La Laguna, San Cristóbal de La Laguna, Tenerife, Spain
| | - M A García-Bello
- Research Unit, Hospital Universitario Nuestra Señora de Candelaria, Santa Cruz de Tenerife, Spain
| | - D Mayato
- Research Unit, Hospital Universitario Nuestra Señora de Candelaria, Santa Cruz de Tenerife, Spain
| | - F Gonzalvo
- Pulmonary Division, Hospital Universitario Nuestra Señora de Candelaria, Santa Cruz de Tenerife, Spain
| | - J Ayra-Plasencia
- Research Unit, Hospital Universitario Nuestra Señora de Candelaria, Santa Cruz de Tenerife, Spain.,University of La Laguna, San Cristóbal de La Laguna, Tenerife, Spain
| | - B Celli
- Pulmonary and Critical Care Department, Brigham and Women's Hospital, Boston, MA, USA
| | - C Casanova
- Research Unit, Hospital Universitario Nuestra Señora de Candelaria, Santa Cruz de Tenerife, Spain.,Pulmonary Division, Hospital Universitario Nuestra Señora de Candelaria, Santa Cruz de Tenerife, Spain.,University of La Laguna, San Cristóbal de La Laguna, Tenerife, Spain
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14
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Cagsin H, Uzan A, Tosun O, Rasmussen F, Serakinci N. Tissue-Specific Ultra-Short Telomeres in Chronic Obstructive Pulmonary Disease. Int J Chron Obstruct Pulmon Dis 2020; 15:2751-2757. [PMID: 33154635 PMCID: PMC7608580 DOI: 10.2147/copd.s267799] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 09/23/2020] [Indexed: 12/21/2022] Open
Abstract
Purpose Telomere biology, especially tissue-specific ultra-short telomeres, might provide a strong contribution to our current knowledge in COPD development as well as a predictive marker for prognosis. To test this hypothesis, we investigated telomere lengths in lung tissue and leukocytes in patients diagnosed with COPD. Patients and Methods Thirty-two patients were included in the current study. All patients showed a post-bronchodilator ratio of less than 70% post-bronchodilator predicted value of forced expiratory volume in second (FEV1%), mean 56%; range [19% to 86%]. To be able to investigate ultra-short telomeres, universal single telomere length analysis (U-STELA) was used. Results Our results showed a higher level of the ultra-short telomere presence in bronchoalveolar lavage (BAL) cells when compared to leukocytes with statistical significance t(62)=5.771, p<0.00001. The FEV1% was lower in subjects with ultra-short telomeres in BAL (50.6% vs 81.6%: p<0.001) and in ultra-short telomeres in blood leukocytes (37.3% vs 58.5%: p=0.051) when compared to subjects without ultra-short telomeres in leukocytes. Furthermore, the patients who had ultra-short telomeres in BAL samples were significantly older (p=0.014) than patients who did not have ultra-short telomeres. Ultra-short telomeres in BAL (p=0.05) but not in leukocytes (p=0.33) were associated with FEV1% in a regressions model adjusting for age (p<0.0001), ever smoking (p<0.0001) and sex (p=0.71). The patients with ultra-short telomeres were graded higher in the Global Initiative for Chronic Obstructive Lung Disease (GOLD) classification (p=0.006). Conclusion This study emphasizes the need to investigate the correct tissue to get a representative evaluation of the stage or advancedness of COPD. To our knowledge, this is the first study to show that there is a correlation between the presence of ultra-short telomeres in lung tissue and COPD severity. Our results suggest that ultra-short telomeres are involved in the molecular pathogenesis of COPD and might be used as a tissue-specific predictive biomarker.
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Affiliation(s)
- Huseyin Cagsin
- Department of Medical Genetics, Faculty of Medicine, Near East University, Nicosia, Cyprus.,Department of Molecular Biology of Genetics, Arts and Sciences Faculty, Near East University, Nicosia, Cyprus
| | - Ali Uzan
- Department of Allergy Sleep and Respiratory Medicine, Near East University Hospital, Nicosia, Cyprus
| | - Ozgur Tosun
- Department of Biostatistics, Faculty of Medicine, Near East University, Nicosia, Cyprus
| | - Finn Rasmussen
- Department of Allergy Sleep and Respiratory Medicine, Near East University Hospital, Nicosia, Cyprus.,Section of Respiratory Medicine; Department of Internal Medicine, Sydvestjysk Hospital, Esbjerg, Denmark
| | - Nedime Serakinci
- Department of Medical Genetics, Faculty of Medicine, Near East University, Nicosia, Cyprus.,Department of Molecular Biology of Genetics, Arts and Sciences Faculty, Near East University, Nicosia, Cyprus
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15
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New Insights into the Implication of Mitochondrial Dysfunction in Tissue, Peripheral Blood Mononuclear Cells, and Platelets during Lung Diseases. J Clin Med 2020; 9:jcm9051253. [PMID: 32357474 PMCID: PMC7287602 DOI: 10.3390/jcm9051253] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Revised: 04/16/2020] [Accepted: 04/20/2020] [Indexed: 12/13/2022] Open
Abstract
Lung diseases such as chronic obstructive pulmonary disease, asthma, pulmonary arterial hypertension, or idiopathic pulmonary fibrosis are major causes of morbidity and mortality. Complex, their physiopathology is multifactorial and includes lung mitochondrial dysfunction and enhanced reactive oxygen species (ROS) release, which deserves increased attention. Further, and importantly, circulating blood cells (peripheral blood mononuclear cells-(PBMCs) and platelets) likely participate in these systemic diseases. This review presents the data published so far and shows that circulating blood cells mitochondrial oxidative capacity are likely to be reduced in chronic obstructive pulmonary disease (COPD), but enhanced in asthma and pulmonary arterial hypertension in a context of increased oxidative stress. Besides such PBMCs or platelets bioenergetics modifications, mitochondrial DNA (mtDNA) changes have also been observed in patients. These new insights open exciting challenges to determine their role as biomarkers or potential guide to a new therapeutic approach in lung diseases.
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16
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Nguyen MT, Saffery R, Burgner D, Lycett K, Vryer R, Grobler A, Dwyer T, Ranganathan S, Wake M. Telomere length and lung function in a population-based cohort of children and mid-life adults. Pediatr Pulmonol 2019; 54:2044-2052. [PMID: 31456360 DOI: 10.1002/ppul.24489] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Accepted: 08/13/2019] [Indexed: 12/27/2022]
Abstract
OBJECTIVE Telomere length is associated with poorer lung health in older adults, possibly from cumulative risk factor exposure, but data are lacking in pediatric and population-based cohorts. We examined associations of telomere length with lung function in children and mid-life adults. METHODS Data were drawn from a population-based cross-sectional study of 11 to 12 year-olds and mid-life adults. Lung function was assessed by spirometric FEV1 , FVC, FEV 1 /FVC ratio, and MMEF 25-75 . Telomere length was measured by quantitative polymerase chain reaction from blood and expressed as the amount of telomeric genomic DNA to the beta-globin gene (T/S ratio). Associations of telomere length with spirometric parameters were tested by linear and logistic regression models, adjusting for potential confounders of sex, age, body mass index, socioeconomic position, physical activity, inflammation, asthma, pubertal status, and smoking. RESULTS Mean T/S ratio was 1.09 (n = 1206; SD 0.55) in children and 0.81 (n = 1343; SD 0.38) in adults. In adults, for every additional unit in T/S ratio, FEV 1 /FVC and MMEF 25-75 z-scores were higher (β 0.21 [95% confidence interval, CI; 0.06-0.36] and 0.23 [95% CI; 0.08-0.38], respectively), and the likelihood of being in the lowest quartile for FEV 1 /FVC and MMEF 25-75 z-scores was lower (odds ratios 0.59 [95% CI, 0.39-0.89] and 0.64 [95% CI, 0.41-0.99], respectively). No evidence of association was seen for adult FEV 1 or FVC, or any childhood spirometric index after adjustments. CONCLUSION Shorter telomere length showed moderate associations with poorer airflow parameters, but not vital capacity (lung volume) in mid-life adults. However, there was no convincing evidence of associations in children.
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Affiliation(s)
- Minh Thien Nguyen
- Murdoch Children's Research Institute, Melbourne, Australia.,Department of Paediatrics, University of Melbourne, Melbourne, Australia
| | - Richard Saffery
- Murdoch Children's Research Institute, Melbourne, Australia.,Department of Paediatrics, University of Melbourne, Melbourne, Australia
| | - David Burgner
- Murdoch Children's Research Institute, Melbourne, Australia.,Department of Paediatrics, University of Melbourne, Melbourne, Australia.,Infectious Diseases, Royal Children's Hospital, Melbourne, Australia.,Department of Paediatrics, Monash University, Clayton, Melbourne, Australia
| | - Kate Lycett
- Murdoch Children's Research Institute, Melbourne, Australia.,Department of Paediatrics, University of Melbourne, Melbourne, Australia
| | - Regan Vryer
- Murdoch Children's Research Institute, Melbourne, Australia.,Department of Paediatrics, University of Melbourne, Melbourne, Australia
| | - Anneke Grobler
- Murdoch Children's Research Institute, Melbourne, Australia.,Department of Paediatrics, University of Melbourne, Melbourne, Australia
| | - Terence Dwyer
- George Institute for Global Health, University of Oxford, Oxford, United Kingdom.,Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia
| | - Sarath Ranganathan
- Murdoch Children's Research Institute, Melbourne, Australia.,Department of Paediatrics, University of Melbourne, Melbourne, Australia.,Respiratory Medicine, Royal Children's Hospital, Melbourne, Australia
| | - Melissa Wake
- Murdoch Children's Research Institute, Melbourne, Australia.,Department of Paediatrics, University of Melbourne, Melbourne, Australia.,Department of Paediatrics and Liggins Institute, University of Auckland, Auckland, New Zealand
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17
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Longitudinal changes in leukocyte telomere length and mortality in elderly Swedish men. Aging (Albany NY) 2019; 10:3005-3016. [PMID: 30375983 PMCID: PMC6224259 DOI: 10.18632/aging.101611] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 10/19/2018] [Indexed: 11/25/2022]
Abstract
Telomere length (TL) is considered an indicator of aging and age-related diseases, but longitudinal studies on TL changes and mortality are few. We therefore analyzed TL and longitudinal changes in TL in relation to all-cause, cardiovascular, and cancer mortality in 247 elderly Swedish men. TL was determined by the qPCR method at ages 71 and 81 and subsequent mortality cases were identified from the Swedish cause-of-death registry. Cox proportional hazard ratios were calculated during a mean follow-up of 7.4 years, during which 178 deaths occurred. Short telomeres at baseline was strongly associated with mortality risks, with a 40 to 70% increased risk of all-cause mortality, and a 2-fold increased risk of cancer mortality. Longitudinal changes in TL revealed shortening in 83% of individuals, whilst 10% extended their telomeres. TL attrition did not predict all-cause or cancer mortality, but we found a 60% decreased risk for cardiovascular mortality in those who shortened their telomeres. Our data show an increased risk of mortality in individuals with short baseline telomeres, but no relations to all-cause, and cancer mortality for changes in TL. Intriguingly, our data indicate lower risk of cardiovascular mortality with shortening of telomeres. The latter should be interpreted cautiously.
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18
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Telomere length in COPD: Relationships with physical activity, exercise capacity, and acute exacerbations. PLoS One 2019; 14:e0223891. [PMID: 31622416 PMCID: PMC6797105 DOI: 10.1371/journal.pone.0223891] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2019] [Accepted: 09/10/2019] [Indexed: 01/11/2023] Open
Abstract
RATIONALE Shorter leukocyte telomere length (LTL) is associated with reduced health-related quality of life and increased risk for acute exacerbations (AEs) and mortality in chronic obstructive pulmonary disease (COPD). Increased physical activity and exercise capacity are associated with reduced risk for AEs and death. However, the relationships between LTL and physical activity, exercise capacity, and AEs in COPD are unknown. METHODS Data from 3 COPD cohorts were examined: Cohort 1 (n = 112, physical activity intervention trial), Cohorts 2 and 3 (n = 182 and 294, respectively, separate observational studies). Subjects completed a 6-minute walk test (6MWT) and provided blood for LTL assessment using real-time PCR. Physical activity was measured as average daily step count using an accelerometer or pedometer. Number of self-reported AEs was available for 1) the year prior to enrollment (Cohorts 1 and 3) and 2) prospectively after enrollment (all cohorts). Multivariate models examined associations between LTL and average daily step count, 6MWT distance, and AEs. RESULTS A significant association between longer LTL and increased 6MWT distance was observed in the three combined cohorts (β = 3x10-5, p = 0.045). No association between LTL and average daily step count was observed. Shorter LTL was associated with an increased number of AEs in the year prior to enrollment (Cohorts 1 and 3 combined, β = -1.93, p = 0.04) and with prospective AEs (Cohort 3, β = -1.3388, p = 0.0003). CONCLUSIONS Among COPD patients, increased LTL is associated with higher exercise capacity, but not physical activity. Shorter LTL was associated with AEs in a subgroup of cohorts.
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19
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Lee EY, Oh SS, White MJ, Eng CS, Elhawary JR, Borrell LN, Nuckton TJ, Zeiger AM, Keys KL, Mak ACY, Hu D, Huntsman S, Contreras MG, Samedy LA, Goddard PC, Salazar SL, Brigino-Buenaventura EN, Davis A, Meade KE, LeNoir MA, Lurmann FW, Burchard EG, Eisen EA, Balmes JR. Ambient air pollution, asthma drug response, and telomere length in African American youth. J Allergy Clin Immunol 2019; 144:839-845.e10. [PMID: 31247265 PMCID: PMC6938647 DOI: 10.1016/j.jaci.2019.06.009] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Revised: 06/07/2019] [Accepted: 06/14/2019] [Indexed: 01/01/2023]
Abstract
BACKGROUND Telomere length (TL) can serve as a potential biomarker for conditions associated with chronic oxidative stress and inflammation, such as asthma. Air pollution can induce oxidative stress. Understanding the relationship between TL, asthma, and air pollution is important for identifying risk factors contributing to unhealthy aging in children. OBJECTIVES We sought to investigate associations between exposures to ambient air pollutants and TL in African American children and adolescents and to examine whether African ancestry, asthma status, and steroid medication use alter the association. METHODS Linear regression was used to examine associations between absolute telomere length (aTL) and estimated annual average residential ozone (O3) and fine particulate matter with a diameter of 2.5 μm or less (PM2.5) exposures in a cross-sectional analysis of 1072 children in an existing asthma case-control study. African ancestry, asthma status, and use of steroid medications were examined as effect modifiers. RESULTS Participants' aTLs were measured by using quantitative PCR. A 1-ppb and 1 μg/m3 increase in annual average exposure to O3 and PM2.5 were associated with a decrease in aTL of 37.1 kilo-base pair (kb; 95% CI, -66.7 to -7.4 kb) and 57.1 kb (95% CI, -118.1 to 3.9 kb), respectively. African ancestry and asthma were not effect modifiers; however, exposure to steroid medications modified the relationships between TL and pollutants. Past-year exposure to O3 and PM2.5 was associated with shorter TLs in patients without steroid use. CONCLUSION Exposure to air pollution was associated with shorter TLs in nonasthmatic children and adolescents. This was not the case for asthmatic children as a group, but those receiving steroid medication had less shortening than those not using steroids. Reduced exposure to air pollution in childhood might help to preserve TL.
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Affiliation(s)
- Eunice Y Lee
- Department of Bioengineering & Therapeutic Sciences, University of California, San Francisco, Calif; Department of Medicine, University of California, San Francisco, Calif.
| | - Sam S Oh
- Department of Medicine, University of California, San Francisco, Calif
| | - Marquitta J White
- Department of Medicine, University of California, San Francisco, Calif
| | - Celeste S Eng
- Department of Medicine, University of California, San Francisco, Calif
| | | | - Luisa N Borrell
- Graduate School of Public Health & Health Policy, City University of New York, New York, NY
| | - Thomas J Nuckton
- Department of Medicine, University of California, San Francisco, Calif
| | - Andrew M Zeiger
- Department of Medicine, University of California, San Francisco, Calif
| | - Kevin L Keys
- Department of Medicine, University of California, San Francisco, Calif
| | - Angel C Y Mak
- Department of Medicine, University of California, San Francisco, Calif
| | - Donglei Hu
- Department of Medicine, University of California, San Francisco, Calif
| | - Scott Huntsman
- Department of Medicine, University of California, San Francisco, Calif
| | - Maria G Contreras
- Department of Medicine, University of California, San Francisco, Calif; San Francisco State University, San Francisco, Calif
| | - Lesly-Anne Samedy
- Department of Bioengineering & Therapeutic Sciences, University of California, San Francisco, Calif
| | - Pagé C Goddard
- Department of Medicine, University of California, San Francisco, Calif
| | - Sandra L Salazar
- Department of Medicine, University of California, San Francisco, Calif
| | | | - Adam Davis
- Children's Hospital and Research Center, Oakland, Calif
| | | | | | | | - Esteban G Burchard
- Department of Bioengineering & Therapeutic Sciences, University of California, San Francisco, Calif; Department of Medicine, University of California, San Francisco, Calif.
| | - Ellen A Eisen
- Environmental Health Sciences Division, School of Public Health, University of California, Berkeley, Calif.
| | - John R Balmes
- Department of Medicine, University of California, San Francisco, Calif; Environmental Health Sciences Division, School of Public Health, University of California, Berkeley, Calif.
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Yoon YS, Jin M, Sin DD. Accelerated lung aging and chronic obstructive pulmonary disease. Expert Rev Respir Med 2019; 13:369-380. [PMID: 30735057 DOI: 10.1080/17476348.2019.1580576] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
INTRODUCTION The prevalence of chronic obstructive pulmonary disease (COPD) increases exponentially with aging. Its pathogenesis, however, is not well known and aside from smoking cessation, there are no disease-modifying treatments for this disease. Areas covered: COPD is associated with accelerating aging and aging-related diseases. In this review, we will discuss the hallmarks of aging including genomic instability, telomere attrition, epigenetic alteration, loss of proteostasis, mitochondrial dysfunction, deregulated nutrient sensing, cellular senescence, stem cell exhaustion, and altered intercellular communication, which may be involved in COPD pathogenesis. Expert commentary: COPD and the aging process share similar molecular and cellular changes. Aging-related molecular pathways may represent novel therapeutic targets and biomarkers for COPD.
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Affiliation(s)
- Young Soon Yoon
- a Centre for Heart and Lung Innovation , St. Paul's Hospital & University of British Columbia , Vancouver , BC , Canada.,b Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine , Dongguk University Ilsan Hospital , Goyang , South Korea
| | - Minhee Jin
- a Centre for Heart and Lung Innovation , St. Paul's Hospital & University of British Columbia , Vancouver , BC , Canada
| | - Don D Sin
- a Centre for Heart and Lung Innovation , St. Paul's Hospital & University of British Columbia , Vancouver , BC , Canada.,c Division of Respiratory Medicine (Department of Medicine) , University of British Columbia , Vancouver , BC , Canada
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21
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Abstract
Chronic obstructive pulmonary disease (COPD) and idiopathic pulmonary fibrosis are regarded as a diseases of accelerated lung ageing and show all of the hallmarks of ageing, including telomere shortening, cellular senescence, activation of PI3 kinase-mTOR signaling, impaired autophagy, mitochondrial dysfunction, stem cell exhaustion, epigenetic changes, abnormal microRNA profiles, immunosenescence and a low grade chronic inflammation due to senescence-associated secretory phenotype (SASP). Many of these ageing mechanisms are driven by exogenous and endogenous oxidative stress. There is also a reduction in anti-ageing molecules, such as sirtuins and Klotho, which further accelerate the ageing process. Understanding these molecular mechanisms has identified several novel therapeutic targets and several drugs and dietary interventions are now in development to treat chronic lung disease.
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Affiliation(s)
- Peter J Barnes
- Airway Disease Section, National Heart and Lung Institute, Imperial College, London, UK.
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Goh F, Yang IA, Bowman RV, Fong KM. Subtype variation and actionability of telomere length abnormality in lung cancer. Transl Lung Cancer Res 2018; 7:S251-S253. [PMID: 30393615 DOI: 10.21037/tlcr.2018.09.03] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Felicia Goh
- University of Queensland Thoracic Research Centre, The Prince Charles Hospital, Brisbane, Australia
| | - Ian A Yang
- University of Queensland Thoracic Research Centre, The Prince Charles Hospital, Brisbane, Australia
| | - Rayleen V Bowman
- University of Queensland Thoracic Research Centre, The Prince Charles Hospital, Brisbane, Australia
| | - Kwun M Fong
- University of Queensland Thoracic Research Centre, The Prince Charles Hospital, Brisbane, Australia
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Aggarwal T, Wadhwa R, Thapliyal N, Sharma K, Rani V, Maurya PK. Oxidative, inflammatory, genetic, and epigenetic biomarkers associated with chronic obstructive pulmonary disorder. J Cell Physiol 2018; 234:2067-2082. [DOI: 10.1002/jcp.27181] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Accepted: 07/17/2018] [Indexed: 12/13/2022]
Affiliation(s)
- Taru Aggarwal
- Amity Institute of Biotechnology, Amity UniversityNoida India
| | - Ridhima Wadhwa
- Amity Institute of Biotechnology, Amity UniversityNoida India
| | | | - Kanishka Sharma
- Amity Education GroupOakdale, Long Island (Suffolk) New York
| | - Varsha Rani
- Amity Education GroupOakdale, Long Island (Suffolk) New York
| | - Pawan K. Maurya
- Amity Institute of Biotechnology, Amity UniversityNoida India
- Amity Education GroupOakdale, Long Island (Suffolk) New York
- Interdisciplinary Laboratory of Clinical Neuroscience (LINC), Department of PsychiatryFederal University of São PauloSão Paulo Brazil
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Relationship of Absolute Telomere Length With Quality of Life, Exacerbations, and Mortality in COPD. Chest 2018; 154:266-273. [PMID: 30017346 DOI: 10.1016/j.chest.2018.05.022] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Revised: 04/07/2018] [Accepted: 05/01/2018] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND COPD is an age-related disease. The role of cellular senescence in COPD has not been fully elucidated. This study examined the relationship between telomere length of peripheral blood leukocytes and clinical outcomes, including health status, rate of exacerbations, and risk of mortality in individuals with COPD. METHODS Using quantitative polymerase chain reaction, we measured the absolute telomere length (aTL) of DNA extracted from blood samples of 576 participants with moderate-to-severe COPD treated with either azithromycin or placebo for 12 months in the Macrolide Azithromycin for Prevention of Exacerbations of COPD (MACRO) study. All participants were followed for approximately 13 months, during which time health status and exacerbations were carefully ascertained, and an additional 29 months for mortality. The rates of exacerbation and mortality were determined by dividing the aTL into two groups using the median value as the cutoff. RESULTS Participants with shorter telomere length had worse health status defined by higher St. George's Respiratory Questionnaire scores (β = -0.09, P = .034). In the placebo arm of the study, the rate of exacerbation (rate ratio, 1.50; 95% CI, 1.16-1.95; P = .002) and the risk of mortality (hazard ratio, 9.45; 95% CI, 2.85-31.36; P = .015) were significantly higher in the shorter telomere group than in the longer telomere group; these differences were not observed in the azithromycin arm (interaction P = .008 for exacerbation and interaction P = .017 for mortality) CONCLUSIONS: These data suggest that replicative senescence may help to predict poor outcomes in COPD. Shorter leukocyte telomere lengths may represent a clinically translatable biomarker for identifying individuals at increased risk of poor clinical outcomes in COPD.
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Doherty JA, Grieshober L, Houck JR, Barnett MJ, Tapsoba JDD, Thornquist M, Wang CY, Goodman GE, Chen C. Telomere Length and Lung Cancer Mortality among Heavy Smokers. Cancer Epidemiol Biomarkers Prev 2018; 27:829-837. [PMID: 29743162 PMCID: PMC6035074 DOI: 10.1158/1055-9965.epi-17-1183] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Revised: 03/08/2018] [Accepted: 05/04/2018] [Indexed: 01/15/2023] Open
Abstract
Background: Accumulating evidence suggests that short telomere length is associated with increased overall mortality, but the relationship with cancer mortality is less clear. We examined whether telomere length (global, and chromosome arm 5p- and 13q-specific) is associated with lung cancer mortality among cases from the β-Carotene and Retinol Efficacy Trial of heavy smokers.Methods: Telomere length was measured on average 6 years before diagnosis for 788 lung cancer cases. Adjusted Cox proportional hazards models of all-cause and lung cancer-specific mortality were assessed for lung cancer overall and by histotype.Results: Short telomere length was associated with increased mortality for small cell lung cancer (SCLC), particularly stage III/IV SCLC [HR and 95% confidence interval for shortest vs. longest telomere length tertile: 3.32 (1.78-6.21)]. Associations were strongest for those randomized to the active intervention and when telomere length was measured ≤5 years before diagnosis. All-cause mortality patterns were similar. Short chromosome 5p telomere length was suggestively associated with lung cancer mortality, but there was no association with chromosome 13q telomere length.Conclusions: Our large prospective study suggests that among heavy smokers who developed lung cancer, short prediagnosis telomere length is associated with increased risk of death from SCLC.Impact: This is the first study to examine telomere length and mortality in lung cancer cases by histotype. If the association between short telomere length and SCLC mortality is replicated, elucidation of mechanisms through which telomere length influences survival for this highly aggressive cancer may inform more effective use of telomere-targeted therapeutics. Cancer Epidemiol Biomarkers Prev; 27(7); 829-37. ©2018 AACR.
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Affiliation(s)
- Jennifer A Doherty
- Department of Population Health Sciences, Huntsman Cancer Institute, University of Utah, Salt Lake City, Utah.
- Program in Epidemiology, Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Laurie Grieshober
- Department of Population Health Sciences, Huntsman Cancer Institute, University of Utah, Salt Lake City, Utah
| | - John R Houck
- Program in Epidemiology, Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Matthew J Barnett
- Program in Epidemiology, Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Jean De Dieu Tapsoba
- Program in Epidemiology, Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Mark Thornquist
- Program in Epidemiology, Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Ching-Yun Wang
- Program in Epidemiology, Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Gary E Goodman
- Program in Epidemiology, Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Chu Chen
- Program in Epidemiology, Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, Washington
- Department of Epidemiology, School of Public Health, University of Washington, Seattle, Washington
- Department of Otolaryngology: Head and Neck Surgery, School of Medicine, University of Washington, Seattle, Washington
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DNA damage and telomere length shortening in the peripheral blood leukocytes of 20 years SM-exposed veterans. Int Immunopharmacol 2018; 61:37-44. [PMID: 29803135 DOI: 10.1016/j.intimp.2018.05.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 05/13/2018] [Accepted: 05/14/2018] [Indexed: 12/21/2022]
Abstract
Sulfur mustard (SM) is a vesicant chemical warfare agent, and a very potent alkylating agent. SM exerts its cytotoxicity via direct alkylation of biomacromolecules, and overproduction of reactive oxygen species (ROS). Previous studies have shown that SM-induced oxidative stress has adverse effects on antioxidant defense system, and damages lipids and proteins. The aim of this study was to investigate the effect of SM-induced oxidative stress on DNA damage, and cellular senescence in SM-exposed victims. For this purpose, MDA levels as a measure of oxidative stress in the serum, 8-oxo-dG content of the genomic DNA, and OGG1 expression as two biomarkers of oxidative DNA damage, as well as, telomere length, and p16INK4a expression as two biomarkers of cellular senescence were measured in the peripheral blood leukocytes of 215 males who were exposed to SM 20 to 25 years ago, and 53 unexposed healthy males as the control group. Our results indicated that the levels of 8-oxo-dG, and OGG1 mRNA expression were significantly higher in SM-exposed individuals. Furthermore, a significant increase in the expression of p16INK4a was observed in SM-exposed patients, and leukocyte telomere length (LTL) was also significantly shorter in severe/very severe cases of SM-exposed patients when compared with unexposed controls. In conclusion, our data indicate that oxidative DNA damage is higher in SM-exposed patients, and their immune system has subjected to cellular senescence.
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Everaerts S, Lammertyn EJ, Martens DS, De Sadeleer LJ, Maes K, van Batenburg AA, Goldschmeding R, van Moorsel CHM, Dupont LJ, Wuyts WA, Vos R, Gayan-Ramirez G, Kaminski N, Hogg JC, Janssens W, Verleden GM, Nawrot TS, Verleden SE, McDonough JE, Vanaudenaerde BM. The aging lung: tissue telomere shortening in health and disease. Respir Res 2018; 19:95. [PMID: 29751799 PMCID: PMC5948770 DOI: 10.1186/s12931-018-0794-z] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Accepted: 04/27/2018] [Indexed: 11/17/2022] Open
Abstract
Background Telomere shortening has been associated with several lung diseases. However, telomere length is generally measured in peripheral blood leucocytes rather than in lung tissue, where disease occurs. Consequently, telomere dynamics have not been established for the normal human lung nor for diseased lung tissue. We hypothesized an age- and disease-dependent shortening of lung tissue telomeres. Methods At time of (re-)transplantation or autopsy, 70 explant lungs were collected: from unused donors (normal, n = 13) and patients with cystic fibrosis (CF, n = 12), chronic obstructive pulmonary disease (COPD, n = 11), chronic hypersensitivity pneumonitis (cHP, n = 9), bronchiolitis obliterans syndrome (BOS) after prior transplantation (n = 11) and restrictive allograft syndrome (RAS) after prior transplantation (n = 14). Lungs were inflated, frozen and then scanned using CT. Four tissue cores from distinct lung regions were sampled for analysis. Disease severity was evaluated using CT and micro CT imaging. DNA was extracted from the samples and average relative telomere length (RTL) was determined using real-time qPCR. Results The normal lungs showed a decrease in RTL with age (p < 0.0001). Of the diseased lungs, only BOS and RAS showed significant RTL decrease with increasing lung age (p = 0.0220 and p = 0.0272 respectively). Furthermore, we found that RTL showed considerable variability between samples within both normal and diseased lungs. cHP, BOS and RAS lungs had significant shorter RTL in comparison with normal lungs, after adjustment for lung age, sex and BMI (p < 0.0001, p = 0.0051 and p = 0.0301 respectively). When investigating the relation between RTL and regional disease severity in CF, cHP and RAS, no association was found. Conclusion These results show a progressive decline in telomere length with age in normal, BOS and RAS lungs. cHP, BOS and RAS lungs demonstrated shorter RTL compared to normal lungs. Lung tissue RTL does not associate with regional disease severity within the lung. Therefore, tissue RTL does not seem to fully reflect peripheral blood telomere length. Electronic supplementary material The online version of this article (10.1186/s12931-018-0794-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Stephanie Everaerts
- Laboratory of Respiratory Diseases, Department of Chronic Diseases, Metabolism & Aging (CHROMETA), KU Leuven, Herestraat 49, O&NI, box 706, B-3000, Leuven, Belgium.
| | - Elise J Lammertyn
- Laboratory of Respiratory Diseases, Department of Chronic Diseases, Metabolism & Aging (CHROMETA), KU Leuven, Herestraat 49, O&NI, box 706, B-3000, Leuven, Belgium
| | - Dries S Martens
- Centre for Environmental Sciences, Hasselt University, Hasselt, Belgium
| | - Laurens J De Sadeleer
- Laboratory of Respiratory Diseases, Department of Chronic Diseases, Metabolism & Aging (CHROMETA), KU Leuven, Herestraat 49, O&NI, box 706, B-3000, Leuven, Belgium
| | - Karen Maes
- Laboratory of Respiratory Diseases, Department of Chronic Diseases, Metabolism & Aging (CHROMETA), KU Leuven, Herestraat 49, O&NI, box 706, B-3000, Leuven, Belgium
| | - Aernoud A van Batenburg
- Department of Pulmonology, St Antonius ILD Center of Excellence, St Antonius Hospital, Nieuwegein, the Netherlands
| | - Roel Goldschmeding
- Department of Pathology, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Coline H M van Moorsel
- Department of Pulmonology, St Antonius ILD Center of Excellence, St Antonius Hospital, Nieuwegein, the Netherlands.,Division of Heart and Lungs, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Lieven J Dupont
- Laboratory of Respiratory Diseases, Department of Chronic Diseases, Metabolism & Aging (CHROMETA), KU Leuven, Herestraat 49, O&NI, box 706, B-3000, Leuven, Belgium.,Department of Respiratory Diseases, University Hospitals Leuven, Leuven, Belgium
| | - Wim A Wuyts
- Laboratory of Respiratory Diseases, Department of Chronic Diseases, Metabolism & Aging (CHROMETA), KU Leuven, Herestraat 49, O&NI, box 706, B-3000, Leuven, Belgium.,Department of Respiratory Diseases, University Hospitals Leuven, Leuven, Belgium
| | - Robin Vos
- Laboratory of Respiratory Diseases, Department of Chronic Diseases, Metabolism & Aging (CHROMETA), KU Leuven, Herestraat 49, O&NI, box 706, B-3000, Leuven, Belgium.,Department of Respiratory Diseases, University Hospitals Leuven, Leuven, Belgium
| | - Ghislaine Gayan-Ramirez
- Laboratory of Respiratory Diseases, Department of Chronic Diseases, Metabolism & Aging (CHROMETA), KU Leuven, Herestraat 49, O&NI, box 706, B-3000, Leuven, Belgium
| | - Naftali Kaminski
- Section of Pulmonary, Critical Care, and Sleep Medicine, Yale University, New Haven, CT, USA
| | - James C Hogg
- University of British Columbia James Hogg Research Centre, St. Paul's Hospital, Vancouver, BC, Canada
| | - Wim Janssens
- Laboratory of Respiratory Diseases, Department of Chronic Diseases, Metabolism & Aging (CHROMETA), KU Leuven, Herestraat 49, O&NI, box 706, B-3000, Leuven, Belgium.,Department of Respiratory Diseases, University Hospitals Leuven, Leuven, Belgium
| | - Geert M Verleden
- Laboratory of Respiratory Diseases, Department of Chronic Diseases, Metabolism & Aging (CHROMETA), KU Leuven, Herestraat 49, O&NI, box 706, B-3000, Leuven, Belgium.,Department of Respiratory Diseases, University Hospitals Leuven, Leuven, Belgium
| | - Tim S Nawrot
- Centre for Environmental Sciences, Hasselt University, Hasselt, Belgium.,Department of Public Health & Primary Care, KU Leuven, Leuven, Belgium
| | - Stijn E Verleden
- Laboratory of Respiratory Diseases, Department of Chronic Diseases, Metabolism & Aging (CHROMETA), KU Leuven, Herestraat 49, O&NI, box 706, B-3000, Leuven, Belgium
| | - John E McDonough
- Laboratory of Respiratory Diseases, Department of Chronic Diseases, Metabolism & Aging (CHROMETA), KU Leuven, Herestraat 49, O&NI, box 706, B-3000, Leuven, Belgium
| | - Bart M Vanaudenaerde
- Laboratory of Respiratory Diseases, Department of Chronic Diseases, Metabolism & Aging (CHROMETA), KU Leuven, Herestraat 49, O&NI, box 706, B-3000, Leuven, Belgium
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Rain M, Chaudhary H, Kukreti R, Thinlas T, Mohammad G, Pasha Q. Elevated Vasodilatory Cyclases and Shorter Telomere Length Contribute to High-Altitude Pulmonary Edema. High Alt Med Biol 2018; 19:60-68. [PMID: 29443612 DOI: 10.1089/ham.2017.0136] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Rain, Manjari, Himanshi Chaudhary, Ritushree Kukreti, Tashi Thinlas, Ghulam Mohammad, and Qadar Pasha. Elevated vasodilatory cyclases and shorter telomere length contribute to high-altitude pulmonary edema. High Alt Med Biol. 19:60-68, 2018. AIM High-altitude (HA) genetics is complex with respect to health and disease (HA pulmonary edema i.e., HAPE). Based on the widely recognized fact that oxidative stress is a major trigger of several physiological processes, this study was designed to establish the significance of vasodilatory cyclases and telomere length in HA physiology. The study was performed in three groups, namely HAPE-free sojourners (HAPE-f, n = 150), HAPE patients (HAPE-p, n = 150), and healthy highland natives or highlanders (HLs, n = 150). Variations in soluble guanylyl cyclase β1-subunit (GUCY1B3) and adenylyl cyclase type 6 (ADCY6) were genotyped by the SNaPshot method and/or Fluidigm SNP type genotyping. Plasma GUCY1B3 and ADCY6 levels were estimated using ELISA, and relative telomere length was estimated by qRT-PCR. RESULTS The rs7638AA genotype was over-represented in HLs compared with HAPE-f and HAPE-p (p = 0.035 and p = 0.012, respectively). Similarly, the rs7638A allele was prevalent in HLs compared with both groups, but significance was attained against HAPE-p (p = 0.012). Significantly elevated plasma levels of GUCY1B3 and ADCY6 were obtained in HAPE-p compared with HAPE-f (p = 0.001 and p = 0.006, respectively) and HLs (p = 3.31E-05 and p = 0.05, respectively). Shorter telomere length was observed in HAPE-p compared with HAPE-f (p > 0.05) and HLs (p = 0.017). CONCLUSION Elevated cyclases and shorter telomere length associate with HAPE pathophysiology.
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Affiliation(s)
- Manjari Rain
- 1 CSIR-Institute of Genomics and Integrative Biology , Delhi, India .,2 Academy of Scientific and Innovative Research , New Delhi, India
| | | | - Ritushree Kukreti
- 1 CSIR-Institute of Genomics and Integrative Biology , Delhi, India .,2 Academy of Scientific and Innovative Research , New Delhi, India
| | - Tashi Thinlas
- 3 Department of Medicine, Sonam Norboo Memorial Hospital , Leh, Ladakh, Jammu and Kashmir, India
| | - Ghulam Mohammad
- 3 Department of Medicine, Sonam Norboo Memorial Hospital , Leh, Ladakh, Jammu and Kashmir, India
| | - Qadar Pasha
- 1 CSIR-Institute of Genomics and Integrative Biology , Delhi, India .,4 Indian Council of Medical Research , New Delhi, India
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Telomerase and the Genetics of Emphysema Susceptibility. Implications for Pathogenesis Paradigms and Patient Care. Ann Am Thorac Soc 2018; 13 Suppl 5:S447-S451. [PMID: 28005428 DOI: 10.1513/annalsats.201609-718aw] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In the past five decades, alpha-1 antitrypsin deficiency has been the only known genetic cause of emphysema, yet it explains the genetics in only 1-2% of severe cases. Recently, mutations in telomerase genes were found to induce susceptibility to young-onset, severe, and familial emphysema at a frequency comparable to that of alpha-1 antitrypsin deficiency. Telomerase mutation carriers with emphysema report a family history of idiopathic pulmonary fibrosis, and both lung phenotypes show autosomal dominant inheritance within families. The data so far point to a strong gene-environment interaction that determines the lung disease type. In never-smokers, pulmonary fibrosis predominates, while smokers, especially females, are at risk for developing emphysema alone or in combination with pulmonary fibrosis. The telomere-mediated emphysema phenotype appears to have clinically recognizable features that are distinct from alpha-1 antitrypsin deficiency, and patients are prone to developing short telomere syndrome comorbidities that influence clinical outcomes. In animal models, telomere dysfunction causes alveolar epithelial stem cell senescence, which is sufficient to drive lung remodeling and recruit inflammation. Here, we review the implications of these discoveries for understanding emphysema biology as well as for patient care.
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Abstract
Aging is characterized by progressive deterioration of physiological integrity, decline in homeostasis, and degeneration of the tissues that occurs after the reproductive phase of life is complete, leading to impaired function. This deterioration is an important risk factor for chronic lung pathologies such as chronic obstructive pulmonary disease (COPD). COPD is a disease that develops gradually. Emphysematous changes in the lung take years to develop after exposure to cigarette smoke; hence, the vast majority of patients are elderly. There has been a dramatic increase in the life expectancy of the general population, resulting in an increased burden of chronic lung diseases. There is growing evidence that molecular mechanisms involved in aging may also play a role in COPD pathogenesis. Recently, the nine hallmarks of aging were identified. In this article, we will review the nine hallmarks of aging and how each hallmark contributes to the pathogenesis of COPD.
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Affiliation(s)
- Shweta P Kukrety
- Department of Internal Medicine, Creighton University, Omaha, NE, USA
| | - Jai D Parekh
- Department of Internal Medicine, Creighton University, Omaha, NE, USA
| | - Kristina L Bailey
- Department of Internal Medicine, University of Nebraska Medical Center; Research Service, Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE, USA
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31
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Brandsma CA, de Vries M, Costa R, Woldhuis RR, Königshoff M, Timens W. Lung ageing and COPD: is there a role for ageing in abnormal tissue repair? Eur Respir Rev 2017; 26:26/146/170073. [PMID: 29212834 DOI: 10.1183/16000617.0073-2017] [Citation(s) in RCA: 108] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Accepted: 09/20/2017] [Indexed: 11/05/2022] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is the fourth leading cause of death worldwide, with increasing prevalence, in particular in the elderly. COPD is characterised by abnormal tissue repair resulting in (small) airways disease and emphysema. There is accumulating evidence that ageing hallmarks are prominent features of COPD. These ageing hallmarks have been described in different subsets of COPD patients, in different lung compartments and also in a variety of cell types, and thus might contribute to different COPD phenotypes. A better understanding of the main differences and similarities between normal lung ageing and the pathology of COPD may improve our understanding of the mechanisms driving COPD pathology, in particular in those patients that develop the most severe form of COPD at a relatively young age, i.e. severe early-onset COPD patients.In this review, after introducing the main concepts of lung ageing and COPD pathology, we focus on the role of (abnormal) ageing in lung remodelling and repair in COPD. We discuss the current evidence for the involvement of ageing hallmarks in these pathological features of COPD. We also highlight potential novel treatment strategies and opportunities for future research based on our current knowledge of abnormal lung ageing in COPD.
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Affiliation(s)
- Corry-Anke Brandsma
- University of Groningen, University Medical Center Groningen, Dept of Pathology and Medical Biology, Groningen, The Netherlands .,University of Groningen, University Medical Center Groningen, Groningen Research Institute for Asthma and COPD (GRIAC), Groningen, The Netherlands
| | - Maaike de Vries
- University of Groningen, University Medical Center Groningen, Groningen Research Institute for Asthma and COPD (GRIAC), Groningen, The Netherlands.,University of Groningen, University Medical Center Groningen, Dept of Epidemiology, Groningen, The Netherlands
| | - Rita Costa
- Comprehensive Pneumology Center, Helmholtz Zentrum München, University Hospital of the Ludwig Maximilians University, Munich, Germany
| | - Roy R Woldhuis
- University of Groningen, University Medical Center Groningen, Dept of Pathology and Medical Biology, Groningen, The Netherlands.,University of Groningen, University Medical Center Groningen, Groningen Research Institute for Asthma and COPD (GRIAC), Groningen, The Netherlands
| | - Melanie Königshoff
- Comprehensive Pneumology Center, Helmholtz Zentrum München, University Hospital of the Ludwig Maximilians University, Munich, Germany.,Division of Pulmonary Sciences and Critical Care Medicine, Dept of Medicine, University of Colorado, Denver, CO, USA.,Both authors contributed equally
| | - Wim Timens
- University of Groningen, University Medical Center Groningen, Dept of Pathology and Medical Biology, Groningen, The Netherlands.,University of Groningen, University Medical Center Groningen, Groningen Research Institute for Asthma and COPD (GRIAC), Groningen, The Netherlands.,Both authors contributed equally
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32
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Telomeres, Aging and Exercise: Guilty by Association? Int J Mol Sci 2017; 18:ijms18122573. [PMID: 29186077 PMCID: PMC5751176 DOI: 10.3390/ijms18122573] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Revised: 11/24/2017] [Accepted: 11/25/2017] [Indexed: 02/07/2023] Open
Abstract
Telomeres are repetitive tandem DNA sequences that cap chromosomal ends protecting genomic DNA from enzymatic degradation. Telomeres progressively shorten with cellular replication and are therefore assumed to correlate with biological and chronological age. An expanding body of evidence suggests (i) a predictable inverse association between telomere length, aging and age-related diseases and (ii) a positive association between physical activity and telomere length. Both hypotheses have garnered tremendous research attention and broad consensus; however, the evidence for each proposition is inconsistent and equivocal at best. Telomere length does not meet the basic criteria for an aging biomarker and at least 50% of key studies fail to find associations with physical activity. In this review, we address the evidence in support and refutation of the putative associations between telomere length, aging and physical activity. We finish with a brief review of plausible mechanisms and potential future research directions.
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Córdoba-Lanús E, Cazorla-Rivero S, Espinoza-Jiménez A, de-Torres JP, Pajares MJ, Aguirre-Jaime A, Celli B, Casanova C. Telomere shortening and accelerated aging in COPD: findings from the BODE cohort. Respir Res 2017; 18:59. [PMID: 28407775 PMCID: PMC5390353 DOI: 10.1186/s12931-017-0547-4] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Accepted: 04/07/2017] [Indexed: 01/28/2023] Open
Abstract
BACKGROUND Chronic Obstructive Pulmonary Disease (COPD) may be associated with accelerated aging. Telomere shortening is a biomarker of aging. Cross-sectional studies describe shorter telomeres in COPD compared with matched controls. No studies have described telomere length trajectory and its relationship with COPD progression. We investigated telomere shortening over time and its relationship to clinical and lung function parameters in a COPD cohort and smoker controls without COPD. METHODS At baseline leukocyte telomere length was measured by qPCR in 121 smokers with COPD and 121 without COPD matched by age (T/S0). The measurements were repeated in 70 of those patients with COPD and 73 non-COPD smokers after 3 years of follow up (T/S3). RESULTS At initial measurement, telomeres were shorter in COPD patients when compared to smoker controls (T/S = 0.68 ± 0.25 vs. 0.88 ± 0.52, p = 0.003) independent from age and sex. During the follow-up period, we observed an accelerated telomere shortening in individuals with COPD in contrast to smoker controls (T/S0 = 0.66 ± 0.21 vs. T/S3 = 0.46 ± 0.16, p < 0.001, for the patients with COPD and T/S0 = 0.83 ± 0.56 vs. T/S3 = 0.74 ± 0.52, p = 0.023 for controls; GLIM, p = 0.001). This shortening was inversely related to the baseline telomere length (r = -0.49, p < 0.001). No significant relationship was found between the rate of change in telomere length and change in lung function in the patients with COPD (p > 0.05). CONCLUSIONS Compared with smokers, patients with COPD have accelerated telomere shortening and this rate of attrition depends on baseline telomere length. Furthermore, the telomere length and its rate of shortening did not relate to clinical and lung function parameters changes over 3 years of follow-up.
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Affiliation(s)
- Elizabeth Córdoba-Lanús
- Research Unit, Hospital Universitario Nuestra Señora de Candelaria, Ctra. del Rosario 145, 38010, Santa Cruz de Tenerife, Spain.
| | - Sara Cazorla-Rivero
- Research Unit, Hospital Universitario Nuestra Señora de Candelaria, Ctra. del Rosario 145, 38010, Santa Cruz de Tenerife, Spain
| | - Adriana Espinoza-Jiménez
- Research Unit, Hospital Universitario Nuestra Señora de Candelaria, Ctra. del Rosario 145, 38010, Santa Cruz de Tenerife, Spain
| | - Juan P de-Torres
- Pulmonary Division, Clínica Universitaria de Navarra, Pamplona, Spain
| | - María J Pajares
- Centro de Investigación Médica Aplicada (CIMA), UNAV, Pamplona, Spain
| | - Armando Aguirre-Jaime
- Research Unit, Hospital Universitario Nuestra Señora de Candelaria, Ctra. del Rosario 145, 38010, Santa Cruz de Tenerife, Spain
| | - Bartolomé Celli
- Pulmonary and Critical Care Department, Brigham and Women's Hospital, Boston, MA, USA
| | - Ciro Casanova
- Research Unit, Hospital Universitario Nuestra Señora de Candelaria, Ctra. del Rosario 145, 38010, Santa Cruz de Tenerife, Spain
- Pulmonary Division, Hospital Universitario Nuestra Señora de Candelaria, Santa Cruz de Tenerife, Spain
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Ding Y, Xu H, Yao J, Xu D, He P, Yi S, Li Q, Liu Y, Wu C, Tian Z. Association between RTEL1 gene polymorphisms and COPD susceptibility in a Chinese Han population. Int J Chron Obstruct Pulmon Dis 2017; 12:931-936. [PMID: 28360516 PMCID: PMC5364006 DOI: 10.2147/copd.s131246] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Objective We investigated the association between single-nucleotide polymorphisms in regulation of telomere elongation helicase 1 (RTEL1), which has been associated with telomere length in several brain cancers and age-related diseases, and the risk of chronic obstructive pulmonary disease (COPD) in a Chinese Han population. Methods In a case–control study that included 279 COPD cases and 290 healthy controls, five single-nucleotide polymorphisms in RTEL1 were selected and genotyped using the Sequenom MassARRAY platform. Odds ratios (ORs) and 95% confidence intervals (CIs) were calculated using unconditional logistic regression after adjusting for age and gender. Results In the genotype model analysis, we determined that rs4809324 polymorphism had a decreased effect on the risk of COPD (CC versus TT: OR =0.28; 95% CI =0.10–0.82; P=0.02). In the genetic model analysis, we found that the “C/C” genotype of rs4809324 was associated with a decreased risk of COPD based on the codominant model (OR =0.33; 95% CI =0.13–0.86; P=0.022) and recessive model (OR =0.32; 95% CI =0.12–0.80; P=0.009). Conclusion Our data shed new light on the association between genetic polymorphisms of RTEL1 and COPD susceptibility in the Chinese Han population.
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Affiliation(s)
- Yipeng Ding
- Department of Emergency, People's Hospital of Hainan Province, Haikou, Hainan, People's Republic of China
| | - Heping Xu
- Department of Emergency, People's Hospital of Hainan Province, Haikou, Hainan, People's Republic of China
| | - Jinjian Yao
- Department of Emergency, People's Hospital of Hainan Province, Haikou, Hainan, People's Republic of China
| | - Dongchuan Xu
- Department of Emergency, People's Hospital of Hainan Province, Haikou, Hainan, People's Republic of China
| | - Ping He
- Department of Emergency, People's Hospital of Hainan Province, Haikou, Hainan, People's Republic of China
| | - Shengyang Yi
- Department of Emergency, People's Hospital of Hainan Province, Haikou, Hainan, People's Republic of China
| | - Quanni Li
- Department of Emergency, People's Hospital of Hainan Province, Haikou, Hainan, People's Republic of China
| | - Yuanshui Liu
- Department of Emergency, People's Hospital of Hainan Province, Haikou, Hainan, People's Republic of China
| | - Cibing Wu
- Department of Emergency, People's Hospital of Hainan Province, Haikou, Hainan, People's Republic of China
| | - Zhongjie Tian
- Department of Emergency, People's Hospital of Hainan Province, Haikou, Hainan, People's Republic of China
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Loprinzi PD, Loenneke JP. Leukocyte telomere length and mortality among U.S. adults: Effect modification by physical activity behaviour. J Sports Sci 2017; 36:213-219. [DOI: 10.1080/02640414.2017.1293280] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Paul D. Loprinzi
- Physical Activity Epidemiology Laboratory, Exercise Psychology Laboratory, Department of Health, Exercise Science and Recreation Management, The University of Mississippi, University, MS, USA
| | - Jeremy P. Loenneke
- Kevser Ermin Applied Physiology Laboratory, Department of Health, Exercise Science, and Recreation Management, The University of Mississippi, University, MS, USA
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Abstract
Chronic obstructive pulmonary disease (COPD) is regarded as a disease of accelerated lung aging. This affliction shows all of the hallmarks of aging, including telomere shortening, cellular senescence, activation of PI3 kinase-mTOR signaling, impaired autophagy, mitochondrial dysfunction, stem cell exhaustion, epigenetic changes, abnormal microRNA profiles, immunosenescence, and a low-grade chronic inflammation (inflammaging). Many of these pathways are driven by chronic exogenous and endogenous oxidative stress. There is also a reduction in antiaging molecules, such as sirtuins and Klotho, which further accelerate the aging process. COPD is associated with several comorbidities (multimorbidity), such as cardiovascular and metabolic diseases, that share the same pathways of accelerated aging. Understanding these mechanisms has helped identify several novel therapeutic targets, and several drugs and dietary interventions are now in development to treat multimorbidity.
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Affiliation(s)
- Peter J. Barnes
- National Heart and Lung Institute, Imperial College, London SW3 6LY, United Kingdom
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37
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Weng Q, Du J, Yu F, Huang T, Chen M, Lv H, Ma H, Hu Z, Jin G, Hu Y, Shen H. The known genetic loci for telomere length may be involved in the modification of telomeres length after birth. Sci Rep 2016; 6:38729. [PMID: 27929092 PMCID: PMC5143977 DOI: 10.1038/srep38729] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Accepted: 11/11/2016] [Indexed: 11/09/2022] Open
Abstract
Telomere length varies considerably among individuals. It is highly heritable and decreases with ageing or ageing related diseases. Recently, genome-wide association studies (GWAS) have identified several genetic loci associated with telomere length in adults. However, it is unclear whether these loci represent the genetic basis of telomere length or determine the individual susceptibility to shortening during growth process. Using DNA extracted from peripheral and cord blood of 444 mother-newborn pairs from a Chinese population, we measured relative telomere length (RTL) and genotyped eight known telomere length related variants that were initially identified in populations of European descent. We observed the T allele of rs10936599 and the T allele of rs2736100 were norminally associated with shorter RTL (P = 0.041 and 0.046, respectively) in maternal samples. Furthermore, the Weighted genetic score (WGS) of eight variants was significantly associated with RTL in maternal samples (R2 = 0.012, P = 0.025). However, we didn't detect any significant associations for any individual variant or the combined WGS with RTL in newborns. These findings didn't support the hypothesis that telomere length related loci may affect telomere length at birth, and we suggested that these loci may play a role in telomere length modification during life course.
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Affiliation(s)
- Qiao Weng
- Drum Tower Clinical Medical College, Nanjing Medical University, Nanjing 210008, China.,State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing 211166, China.,Department of Obstetrics and Gynecology, Nanjing Drum Tower Hospital, Affiliated to Nanjing University Medical School, Nanjing 210008, China
| | - Jiangbo Du
- State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing 211166, China.,Department of Epidemiology and Biostatistics, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Fei Yu
- State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing 211166, China.,Department of Epidemiology and Biostatistics, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Tongtong Huang
- Department of Epidemiology and Biostatistics, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Mengxi Chen
- Department of Epidemiology and Biostatistics, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Hong Lv
- Department of Epidemiology and Biostatistics, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Hongxia Ma
- Department of Epidemiology and Biostatistics, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Zhibin Hu
- State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing 211166, China.,Department of Epidemiology and Biostatistics, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Guangfu Jin
- State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing 211166, China.,Department of Epidemiology and Biostatistics, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Yali Hu
- Drum Tower Clinical Medical College, Nanjing Medical University, Nanjing 210008, China.,Department of Obstetrics and Gynecology, Nanjing Drum Tower Hospital, Affiliated to Nanjing University Medical School, Nanjing 210008, China
| | - Hongbing Shen
- State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing 211166, China.,Department of Epidemiology and Biostatistics, School of Public Health, Nanjing Medical University, Nanjing 211166, China
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Choudhury G, MacNee W. Role of Inflammation and Oxidative Stress in the Pathology of Ageing in COPD: Potential Therapeutic Interventions. COPD 2016; 14:122-135. [DOI: 10.1080/15412555.2016.1214948] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Gourab Choudhury
- MRC Centre for Inflammation Research, Queens Medical Research Institute, 47 little France Crescent Edinburgh, United Kingdom
| | - William MacNee
- MRC Centre for Inflammation Research, Queens Medical Research Institute, 47 little France Crescent Edinburgh, United Kingdom
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Escribano A, Pastor S, Reula A, Castillo S, Vicente S, Sanz F, Casas F, Torres M, Fernández-Fabrellas E, Codoñer-Franch P, Dasí F. Accelerated telomere attrition in children and teenagers with α1-antitrypsin deficiency. Eur Respir J 2016; 48:350-8. [PMID: 27390278 DOI: 10.1183/13993003.00176-2016] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2016] [Accepted: 05/17/2016] [Indexed: 12/20/2022]
Abstract
Numerous studies have shown that oxidative stress accelerates telomere shortening in several lung pathologies. Since oxidative stress is involved in the pathophysiology of α1-antitrypsin deficiency (AATD), we hypothesised that telomere shortening would be accelerated in AATD patients. This study aimed to assess telomere length in AATD patients and to study its association with α1-antitrypsin phenotypes.Telomere length, telomerase activity, telomerase reverse transcriptase (hTERT) expression and biomarkers of oxidative stress were measured in 62 children and teenagers (aged 2–18 years) diagnosed with AATD and 18 controls (aged 3–16 years).Our results show that intermediate-risk (MZ; SZ) and high-risk (ZZ) AATD patients have significantly shorter telomeres and increased oxidative stress than controls. Correlation studies indicate that telomere length was related to oxidative stress markers in AATD patients. Multiple hypothesis testing revealed an association between telomere length, telomerase activity, hTERT expression and AATD phenotypes; high-risk patients showed shorter telomeres, lower hTERT expression and decreased telomerase activity than intermediate-risk and low-risk patients.AATD patients show evidence of increased oxidative stress leading to telomere attrition. An association between telomere and α1-antitrypsin phenotypes is observed suggesting that telomere length could be a promising biomarker for AATD disease progression.
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40
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Lenart P, Krejci L. Reprint of "DNA, the central molecule of aging". Mutat Res 2016; 788:25-31. [PMID: 27133220 DOI: 10.1016/j.mrfmmm.2016.04.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Revised: 01/16/2016] [Accepted: 01/30/2016] [Indexed: 01/05/2023]
Abstract
Understanding the molecular mechanism of aging could have enormous medical implications. Despite a century of research, however, there is no universally accepted theory regarding the molecular basis of aging. On the other hand, there is plentiful evidence suggesting that DNA constitutes the central molecule in this process. Here, we review the roles of chromatin structure, DNA damage, and shortening of telomeres in aging and propose a hypothesis for how their interplay leads to aging phenotypes.
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Affiliation(s)
- Peter Lenart
- Department of Biology, Masaryk University, Brno, Czech Republic
| | - Lumir Krejci
- Department of Biology, Masaryk University, Brno, Czech Republic; International Clinical Research Center, Center for Biomolecular and Cellular Engineering, St. Anne's University Hospital Brno, Brno, Czech Republic; National Centre for Biomolecular Research, Masaryk University, Brno, Czech Republic.
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Glei DA, Goldman N, Risques RA, Rehkopf DH, Dow WH, Rosero-Bixby L, Weinstein M. Predicting Survival from Telomere Length versus Conventional Predictors: A Multinational Population-Based Cohort Study. PLoS One 2016; 11:e0152486. [PMID: 27049651 PMCID: PMC4822878 DOI: 10.1371/journal.pone.0152486] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Accepted: 03/15/2016] [Indexed: 11/19/2022] Open
Abstract
Telomere length has generated substantial interest as a potential predictor of aging-related diseases and mortality. Some studies have reported significant associations, but few have tested its ability to discriminate between decedents and survivors compared with a broad range of well-established predictors that include both biomarkers and commonly collected self-reported data. Our aim here was to quantify the prognostic value of leukocyte telomere length relative to age, sex, and 19 other variables for predicting five-year mortality among older persons in three countries. We used data from nationally representative surveys in Costa Rica (N = 923, aged 61+), Taiwan (N = 976, aged 54+), and the U.S. (N = 2672, aged 60+). Our study used a prospective cohort design with all-cause mortality during five years post-exam as the outcome. We fit Cox hazards models separately by country, and assessed the discriminatory ability of each predictor. Age was, by far, the single best predictor of all-cause mortality, whereas leukocyte telomere length was only somewhat better than random chance in terms of discriminating between decedents and survivors. After adjustment for age and sex, telomere length ranked between 15th and 17th (out of 20), and its incremental contribution was small; nine self-reported variables (e.g., mobility, global self-assessed health status, limitations with activities of daily living, smoking status), a cognitive assessment, and three biological markers (C-reactive protein, serum creatinine, and glycosylated hemoglobin) were more powerful predictors of mortality in all three countries. Results were similar for cause-specific models (i.e., mortality from cardiovascular disease, cancer, and all other causes combined). Leukocyte telomere length had a statistically discernible, but weak, association with mortality, but it did not predict survival as well as age or many other self-reported variables. Although telomere length may eventually help scientists understand aging, more powerful and more easily obtained tools are available for predicting survival.
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Affiliation(s)
- Dana A. Glei
- Center for Population and Health, Georgetown University, Washington, District of Columbia, United States of America
| | - Noreen Goldman
- Office of Population Research, Princeton University, Princeton, New Jersey, United States of America
| | - Rosa Ana Risques
- Department of Pathology, University of Washington, Seattle, Washington, United States of America
| | - David H. Rehkopf
- Division of General Medical Disciplines, School of Medicine, Stanford University, Stanford, California, United States of America
| | - William H. Dow
- School of Public Health, University of California-Berkeley, Berkeley, California, United States of America
| | - Luis Rosero-Bixby
- Centro Centroamericano de Población, Universidad de Costa Rica, San Jose, Costa Rica
| | - Maxine Weinstein
- Center for Population and Health, Georgetown University, Washington, District of Columbia, United States of America
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42
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Leukocyte telomere length and mortality in the National Health and Nutrition Examination Survey, 1999-2002. Epidemiology 2016; 26:528-35. [PMID: 26039272 DOI: 10.1097/ede.0000000000000299] [Citation(s) in RCA: 113] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND This study examined the association between leukocyte telomere length--a marker of cell aging--and mortality in a nationally representative sample of US adults ages 50-84 years. We also examined moderating effects of age, sex, race/ethnicity, and education. METHODS Data were from the National Health and Nutrition Examination Survey, 1999-2002 (n = 3,091). Cox proportional hazards regression was used to estimate the risk of all-cause and cause- specific mortality adjusting for sociodemographic characteristics, smoking, body mass index, and chronic conditions. RESULTS Eight hundred and seventy deaths occurred over an average of 9.5 years of follow-up. In the full sample, a decrease of 1 kilobase pair in telomere length at baseline was marginally associated with a 10% increased hazard of all-cause mortality (hazard ratio [HR]: 1.1, 95% confidence interval [CI]: 0.9, 1.4) and a 30% increased hazard of death due to diseases other than cardiovascular disease or cancer (HR: 1.3, 95% CI: 0.9, 1.9). Among African-American but not white or Mexican-American respondents, a decrease of 1 kilobase pair in telomere length at baseline was associated with a two-fold increased hazard of cardiovascular mortality (HR: 2.0, 95% CI: 1.3, 3.1). There was no association between telomere length and cancer mortality. CONCLUSIONS The association between leukocyte telomere length and mortality differs by race/ethnicity and cause of death.
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43
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DNA, the central molecule of aging. Mutat Res 2016; 786:1-7. [PMID: 26871429 DOI: 10.1016/j.mrfmmm.2016.01.007] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Revised: 01/16/2016] [Accepted: 01/30/2016] [Indexed: 02/07/2023]
Abstract
Understanding the molecular mechanism of aging could have enormous medical implications. Despite a century of research, however, there is no universally accepted theory regarding the molecular basis of aging. On the other hand, there is plentiful evidence suggesting that DNA constitutes the central molecule in this process. Here, we review the roles of chromatin structure, DNA damage, and shortening of telomeres in aging and propose a hypothesis for how their interplay leads to aging phenotypes.
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44
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Kooman JP, Shiels PG, Stenvinkel P. Premature aging in chronic kidney disease and chronic obstructive pulmonary disease: similarities and differences. Curr Opin Clin Nutr Metab Care 2015; 18:528-34. [PMID: 26372510 DOI: 10.1097/mco.0000000000000218] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
PURPOSE OF REVIEW There is increasing clinical and pathophysiological evidence that a premature aging process is involved in the pathogenesis of systemic complications of many chronic organ diseases, which result in analogous phenotypes, including premature vascular aging, osteoporosis and muscle wasting. Novel developments from research into the aging process will, therefore, have relevance for understanding complications of organ diseases, such as chronic kidney disease and chronic obstructive pulmonary disease. The aim of the present article is to combine recent literature on aging mechanisms with evidence on the pathogenesis of systemic complications of these two chronic debilitating disorders. RECENT FINDINGS Recently, nine hallmarks of aging have been identified. In this review, we argue that all of these hallmarks are relevant for the pathogenesis of premature aging processes in chronic obstructive pulmonary disease and chronic kidney disease. Additionally, organ-specific alterations in proaging mechanisms, which reveal differences in phenotype against a generic background of premature aging, will be addressed. However, within patient populations who share a common diagnosis, clusters of patients with different phenotypes may be identified, which may show overlap with patients with other chronic diseases. SUMMARY An increased understanding of the premature aging process as well as its systemic consequences may pave the way for 'precision' intervention as well as shared treatment opportunities between chronic debilitating diseases of various causes.
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Affiliation(s)
- Jeroen P Kooman
- aDivision of Nephrology, Department of Internal Medicine, University Hospital Maastricht, Maastricht, the Netherlands bInstitute of Cancer Sciences, Wolfson Wohl Translational Research Centre, University of Glasgow, Glasgow, UK cDivision of Renal Medicine, Department of Clinical Science, Intervention and Technology, Karolinska University Hospital, Stockholm, Sweden
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Martin-Ruiz CM, Baird D, Roger L, Boukamp P, Krunic D, Cawthon R, Dokter MM, van der Harst P, Bekaert S, de Meyer T, Roos G, Svenson U, Codd V, Samani NJ, McGlynn L, Shiels PG, Pooley KA, Dunning AM, Cooper R, Wong A, Kingston A, von Zglinicki T. Reproducibility of telomere length assessment: an international collaborative study. Int J Epidemiol 2015; 44:1673-83. [PMID: 25239152 PMCID: PMC4681105 DOI: 10.1093/ije/dyu191] [Citation(s) in RCA: 121] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/28/2014] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Telomere length is a putative biomarker of ageing, morbidity and mortality. Its application is hampered by lack of widely applicable reference ranges and uncertainty regarding the present limits of measurement reproducibility within and between laboratories. METHODS We instigated an international collaborative study of telomere length assessment: 10 different laboratories, employing 3 different techniques [Southern blotting, single telomere length analysis (STELA) and real-time quantitative PCR (qPCR)] performed two rounds of fully blinded measurements on 10 human DNA samples per round to enable unbiased assessment of intra- and inter-batch variation between laboratories and techniques. RESULTS Absolute results from different laboratories differed widely and could thus not be compared directly, but rankings of relative telomere lengths were highly correlated (correlation coefficients of 0.63-0.99). Intra-technique correlations were similar for Southern blotting and qPCR and were stronger than inter-technique ones. However, inter-laboratory coefficients of variation (CVs) averaged about 10% for Southern blotting and STELA and more than 20% for qPCR. This difference was compensated for by a higher dynamic range for the qPCR method as shown by equal variance after z-scoring. Technical variation per laboratory, measured as median of intra- and inter-batch CVs, ranged from 1.4% to 9.5%, with differences between laboratories only marginally significant (P = 0.06). Gel-based and PCR-based techniques were not different in accuracy. CONCLUSIONS Intra- and inter-laboratory technical variation severely limits the usefulness of data pooling and excludes sharing of reference ranges between laboratories. We propose to establish a common set of physical telomere length standards to improve comparability of telomere length estimates between laboratories.
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Affiliation(s)
| | - Duncan Baird
- Institute of Cancer and Genetics, Cardiff University, Cardiff, UK
| | - Laureline Roger
- Institute of Cancer and Genetics, Cardiff University, Cardiff, UK
| | - Petra Boukamp
- Deutsches Krebsforschungszentrum (DKFZ), Heidelberg, Germany
| | - Damir Krunic
- Deutsches Krebsforschungszentrum (DKFZ), Heidelberg, Germany
| | - Richard Cawthon
- Department of Human Genetics, University of Utah, Salt Lake City, UT, USA
| | - Martin M Dokter
- Department of Cardiology, University of Groningen, Groningen, The Netherlands
| | - Pim van der Harst
- Department of Cardiology, University of Groningen, Groningen, The Netherlands
| | - Sofie Bekaert
- Bimetra, Clinical Research Center, Ghent University Hospital, Ghent, Belgium
| | - Tim de Meyer
- Department of Mathematical Modelling, Statistics and Bioinformatics, Ghent University, Ghent, Belgium
| | - Goran Roos
- Department of Medical Biosciences, Umeå University, Umeå, Sweden
| | - Ulrika Svenson
- Department of Medical Biosciences, Umeå University, Umeå, Sweden
| | - Veryan Codd
- Department of Cardiovascular Sciences, University of Leicester, Leicester, UK
| | - Nilesh J Samani
- Department of Cardiovascular Sciences, University of Leicester, Leicester, UK
| | - Liane McGlynn
- Institute of Cancer Sciences, University of Glasgow, Glasgow, UK
| | - Paul G Shiels
- Institute of Cancer Sciences, University of Glasgow, Glasgow, UK
| | | | - Alison M Dunning
- Department of Oncology, Centre for Cancer Genetic Epidemiology, University of Cambridge, Cambridge, UK and
| | - Rachel Cooper
- MRC Unit for Lifelong Health and Ageing at UCL, London, UK
| | - Andrew Wong
- MRC Unit for Lifelong Health and Ageing at UCL, London, UK
| | - Andrew Kingston
- Newcastle University Institute for Ageing, Newcastle University, Newcastle, UK
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Liu SF, Kuo HC, Tseng CW, Huang HT, Chen YC, Tseng CC, Lin MC. Leukocyte Mitochondrial DNA Copy Number Is Associated with Chronic Obstructive Pulmonary Disease. PLoS One 2015; 10:e0138716. [PMID: 26394041 PMCID: PMC4578933 DOI: 10.1371/journal.pone.0138716] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2015] [Accepted: 09/02/2015] [Indexed: 11/21/2022] Open
Abstract
BACKGROUND Oxidative stress is known to be involved in the pathogenesis of chronic obstructive pulmonary disease (COPD). Evidence suggests that leukocytes mitochondria DNA (mtDNA) is susceptible to undergo mutations, insertions, or depletion in response to reactive oxidative stress (ROS). We hypothesize that mtDNA copy number is associated with the development of COPD. METHODOLOGY/PRINCIPAL FINDINGS Relative mtDNA copy number was measured by a quantitative real-time PCR assay using DNA extracted from peripheral leukocytes. MtDNA copy number of peripheral leukocytes in the COPD group (n = 86) is significantly decreased compared with non-smoker group (n = 77) (250.3± 21.5 VS. 464.2± 49.9, P<0.001). MtDNA copy number in the COPD group was less than that in the healthy smoking group, but P value nearly achieved significance (250.3± 21.5 VS. 404.0± 76.7, P = 0.08) MtDNA copy number has no significance with age, gender, body mass index, current smoking, and pack-years in COPD group, healthy smoker group and no smoker group, respectively. Serum glutathione level in the COPD group is significantly decreased compared with healthy smoker and non-smoker groups (4.5± 1.3 VS. 6.2± 1.9 and 4.5± 1.3 VS. 7.1±1.1 mU/mL; P<0.001 respectively). Pearson correlation test shows a significant liner correlation between mtDNA copy number and serum glutathione level (R = 0.2, P = 0.009). CONCLUSIONS/SIGNIFICANCE COPD is associated with decreased leukocyte mtDNA copy number and serum glutathione. COPD is a regulatory disorder of leukocytes mitochondria. However, further studies are needed to determine the real mechanisms about the gene and the function of mitochondria.
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Affiliation(s)
- Shih-Feng Liu
- Division of Pulmonary & Critical Care Medicine, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
- Department of Respiratory Therapy, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
- Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Ho-Chang Kuo
- Department of Respiratory Therapy, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
- Chang Gung University College of Medicine, Kaohsiung, Taiwan
- Department of Pediatrics, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
| | - Ching-Wan Tseng
- Department of Respiratory Therapy, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
| | - Hung-Tu Huang
- Department of Anatomy, School of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Yung-Che Chen
- Division of Pulmonary & Critical Care Medicine, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
- Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Chia-Cheng Tseng
- Division of Pulmonary & Critical Care Medicine, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
- Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Meng-Chih Lin
- Division of Pulmonary & Critical Care Medicine, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
- Department of Respiratory Therapy, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
- Chang Gung University College of Medicine, Kaohsiung, Taiwan
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Automated Assay of Telomere Length Measurement and Informatics for 100,000 Subjects in the Genetic Epidemiology Research on Adult Health and Aging (GERA) Cohort. Genetics 2015; 200:1061-72. [PMID: 26092717 DOI: 10.1534/genetics.115.178624] [Citation(s) in RCA: 102] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Accepted: 06/02/2015] [Indexed: 02/07/2023] Open
Abstract
The Kaiser Permanente Research Program on Genes, Environment, and Health (RPGEH) Genetic Epidemiology Research on Adult Health and Aging (GERA) cohort includes DNA specimens extracted from saliva samples of 110,266 individuals. Because of its relationship to aging, telomere length measurement was considered an important biomarker to develop on these subjects. To assay relative telomere length (TL) on this large cohort over a short time period, we created a novel high throughput robotic system for TL analysis and informatics. Samples were run in triplicate, along with control samples, in a randomized design. As part of quality control, we determined the within-sample variability and employed thresholds for the elimination of outlying measurements. Of 106,902 samples assayed, 105,539 (98.7%) passed all quality control (QC) measures. As expected, TL in general showed a decline with age and a sex difference. While telomeres showed a negative correlation with age up to 75 years, in those older than 75 years, age positively correlated with longer telomeres, indicative of an association of longer telomeres with more years of survival in those older than 75. Furthermore, while females in general had longer telomeres than males, this difference was significant only for those older than age 50. An additional novel finding was that the variance of TL between individuals increased with age. This study establishes reliable assay and analysis methodologies for measurement of TL in large, population-based human studies. The GERA cohort represents the largest currently available such resource, linked to comprehensive electronic health and genotype data for analysis.
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Liu JCY, Leung JM, Ngan DA, Nashta NF, Guillemi S, Harris M, Lima VD, Um SJ, Li Y, Tam S, Shaipanich T, Raju R, Hague C, Leipsic JA, Bourbeau J, Tan WC, Harrigan PR, Sin DD, Montaner J, Man SFP. Absolute leukocyte telomere length in HIV-infected and uninfected individuals: evidence of accelerated cell senescence in HIV-associated chronic obstructive pulmonary disease. PLoS One 2015; 10:e0124426. [PMID: 25885433 PMCID: PMC4401786 DOI: 10.1371/journal.pone.0124426] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2014] [Accepted: 03/13/2015] [Indexed: 11/30/2022] Open
Abstract
Combination antiretroviral therapy (cART) has extended the longevity of human immunodeficiency virus (HIV)-infected individuals. However, this has resulted in greater awareness of age-associated diseases such as chronic obstructive pulmonary disease (COPD). Accelerated cellular senescence may be responsible, but its magnitude as measured by leukocyte telomere length is unknown and its relationship to HIV-associated COPD has not yet been established. We measured absolute telomere length (aTL) in peripheral leukocytes from 231 HIV-infected adults. Comparisons were made to 691 HIV-uninfected individuals from a population-based sample. Subject quartiles of aTL were assessed for relationships with measures of HIV disease severity, airflow obstruction, and emphysema severity on computed tomographic (CT) imaging. Multivariable regression models identified factors associated with shortened aTL. Compared to HIV-uninfected subjects, the mean aTL in HIV-infected patients was markedly shorter by 27 kbp/genome (p<0.001); however, the slopes of aTL vs. age were not different (p=0.469). Patients with longer known durations of HIV infection (p=0.019) and lower nadir CD4 cell counts (p=0.023) had shorter aTL. Shorter aTL were also associated with older age (p=0.026), smoking (p=0.005), reduced forced expiratory volume in one second (p=0.030), and worse CT emphysema severity score (p=0.049). HIV-infected subjects demonstrate advanced cellular aging, yet in a cART-treated cohort, the relationship between aTL and age appears no different from that of HIV-uninfected subjects.
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Affiliation(s)
| | | | - David A. Ngan
- Centre for Heart Lung Innovation, Vancouver, BC, Canada
| | - Negar F. Nashta
- AIDS Research Program, St. Paul’s Hospital, Vancouver, BC, Canada
| | - Silvia Guillemi
- Department of Family Medicine, Faculty of Medicine, University of British Columbia, Vancouver, Canada
- Division of HIV/AIDS, Department of Medicine, University of British Columbia, Vancouver, Canada
- BC Centre for Excellence in HIV/AIDS, St. Paul’s Hospital, Vancouver, BC, Canada
| | - Marianne Harris
- AIDS Research Program, St. Paul’s Hospital, Vancouver, BC, Canada
- Department of Family Medicine, Faculty of Medicine, University of British Columbia, Vancouver, Canada
- Division of HIV/AIDS, Department of Medicine, University of British Columbia, Vancouver, Canada
| | - Viviane D. Lima
- BC Centre for Excellence in HIV/AIDS, St. Paul’s Hospital, Vancouver, BC, Canada
| | - Soo-Jung Um
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Dong-A University, Busan, South Korea
| | - Yuexin Li
- Centre for Heart Lung Innovation, Vancouver, BC, Canada
| | - Sheena Tam
- Centre for Heart Lung Innovation, Vancouver, BC, Canada
| | - Tawimas Shaipanich
- UBC Department of Medicine and Division of Respiratory Medicine, St. Paul’s Hospital, Vancouver, BC, Canada
| | - Rekha Raju
- Department of Radiology and Diagnostic Imaging, St. Paul’s Hospital, Vancouver, BC, Canada
| | - Cameron Hague
- Department of Radiology and Diagnostic Imaging, St. Paul’s Hospital, Vancouver, BC, Canada
| | - Jonathon A. Leipsic
- Department of Radiology and Diagnostic Imaging, St. Paul’s Hospital, Vancouver, BC, Canada
| | - Jean Bourbeau
- Respiratory Epidemiology and Clinical Research Unit, Montreal Chest Institute, McGill University, Montreal, Quebec, Canada
| | - Wan C. Tan
- Centre for Heart Lung Innovation, Vancouver, BC, Canada
| | - P. Richard Harrigan
- BC Centre for Excellence in HIV/AIDS, St. Paul’s Hospital, Vancouver, BC, Canada
| | - Don D. Sin
- Centre for Heart Lung Innovation, Vancouver, BC, Canada
- UBC Department of Medicine and Division of Respiratory Medicine, St. Paul’s Hospital, Vancouver, BC, Canada
| | - Julio Montaner
- Division of HIV/AIDS, Department of Medicine, University of British Columbia, Vancouver, Canada
- BC Centre for Excellence in HIV/AIDS, St. Paul’s Hospital, Vancouver, BC, Canada
| | - S. F. Paul Man
- Centre for Heart Lung Innovation, Vancouver, BC, Canada
- UBC Department of Medicine and Division of Respiratory Medicine, St. Paul’s Hospital, Vancouver, BC, Canada
- * E-mail:
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Needham B, Mezuk B, Bareis N, Lin J, Blackburn E, Epel E. Depression, anxiety and telomere length in young adults: evidence from the National Health and Nutrition Examination Survey. Mol Psychiatry 2015; 20:520-8. [PMID: 25178165 PMCID: PMC4346549 DOI: 10.1038/mp.2014.89] [Citation(s) in RCA: 97] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Revised: 06/13/2014] [Accepted: 06/23/2014] [Indexed: 01/01/2023]
Abstract
Telomere length has been hypothesized to be a marker of cumulative exposure to stress, and stress is an established cause of depression and anxiety disorders. The aim of this study was to examine the relationship between depression, anxiety and telomere length, and to assess whether this relationship is moderated by race/ethnicity, gender and/or antidepressant use. Data were from the 1999-2002 National Health and Nutrition Examination Survey. Telomere length was assessed using the quantitative PCR method of telomere length relative to standard reference DNA. Past-year major depression (MD), generalized anxiety disorder (GAD) and panic disorder (PD), as well as depressed affect and anxious affect, were assessed using the Composite International Diagnostic Inventory (N=1290). Multiple linear regression was used to assess the relationship between depression and anxiety disorders and telomere length. Among women, those with GAD or PD had shorter telomeres than those with no anxious affect (β: -0.07, P<0.01), but there was no relationship among men (β: 0.08, P>0.05). Among respondents currently taking an antidepressant, those with MD had shorter telomeres than those without (β: -0.26, P<0.05), but there was no association between MD and telomere length among those not using antidepressants (β: -0.00, P>0.05). Neither depressive nor anxiety disorders were directly associated with telomere length in young adults. There was suggestive evidence that pharmacologically treated MD is associated with shorter telomere length, likely reflecting the more severe nature of MD that has come to clinical attention.
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Affiliation(s)
- Belinda Needham
- Department of Epidemiology, University of Michigan School of Public Health
| | - Briana Mezuk
- Division of Epidemiology, Department of Family Medicine and Population Health, Virginia Commonwealth University School of Medicine,Institute for Social Research, University of Michigan
| | - Natalie Bareis
- Division of Epidemiology, Department of Family Medicine and Population Health, Virginia Commonwealth University School of Medicine
| | - Jue Lin
- Department of Biochemistry and Biophysics, University of California, San Francisco
| | - Elizabeth Blackburn
- Department of Biochemistry and Biophysics, University of California, San Francisco
| | - Elissa Epel
- Department of Psychiatry, University of California, San Francisco
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Magd GEM, Entesar AS, Manal HR, Eman SM, Mona AH. Telomere length in chronic obstructive pulmonary disease. THE EGYPTIAN JOURNAL OF BRONCHOLOGY 2015. [DOI: 10.4103/1687-8426.153569] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Abstract
Background
Telomere length (TL) is considered a biomarker of cellular aging. Chronic obstructive pulmonary disease (COPD) is found to be associated with premature aging and the senescence hypothesis is now accepted as a molecular pathway for COPD development.
Purpose
The aim of this study was to measure TL in COPD patients and to study its relation to demographic data, spirometric indices, and arterial blood gases parameters.
Participants and methods
We measured TL using quantitative PCR in 20 patients with severe to very severe COPD and 11 age-matched and sex-matched nonsmokers.
Results
TL was significantly shorter in COPD patients (P < 0.001). Among COPD patients, TL was significantly shorter in current smokers than ex-smokers. In COPD patients, TL was correlated positively with SpO2%, pH (P < 0.05), PaO2 (P < 0.01), FVC% (P < 0.05) and FEV1%, and FEF25–75% (P < 0.001) and not correlated with pack-year. The BODE (Body mass index, airflow Obstruction, Dyspnea, and Exercise capacity) index was correlated negatively with TL (P < 0.01); among BODE index parameters, the dyspnea score correlated negatively (P < 0.05) with TL. TL was shorter in very severe COPD than severe COPD (P < 0.001).
Conclusion
Our data support accelerated cellular senescence in COPD represented by shortening of TL; TL was correlated positively with airflow limitation and it may be related to impaired physical activities in COPD, which is a manifestation of the aging process.
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