101
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Gurung RL, Dorajoo R, M Y, Wang L, Liu S, Liu JJ, Shao YM, Chen Y, Sim X, Ang K, Subramaniam T, Tang WE, Sum CF, Liu JJ, Lim SC. Association of leukocyte telomere length with chronic kidney disease in East Asians with type 2 diabetes: a Mendelian randomization study. Clin Kidney J 2021; 14:2371-2376. [PMID: 34754432 PMCID: PMC8573005 DOI: 10.1093/ckj/sfab067] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 03/11/2021] [Indexed: 12/26/2022] Open
Abstract
Background Chronic kidney disease (CKD) is common among people with type 2 diabetes (T2D), and increases the risk of kidney failure and cardiovascular diseases. Shorter leukocyte telomere length (LTL) is associated with CKD in patients with T2D. We previously reported single-nucleotide polymorphisms (SNPs) associated with LTL in an Asian population. In this study, we elucidated the association of these SNPs with CKD in patients with T2D using the Mendelian randomization (MR) approach. Methods The cross-sectional association of 16 LTL SNPs with CKD, defined as an estimated glomerular filtration rate of <60 mL/min/1.73 m2, was assessed among 4768 (1628 cases and 3140 controls) participants in the Singapore Study of Macro-angiopathy and Micro-vascular Reactivity in T2D and Diabetic Nephropathy cohorts. MR analysis was performed using the random-effect inverse-variance weighted (IVW) method, the weighted median, MR-Egger and Radial MR adjusted for age and sex-stratified by cohorts and ethnicity (Chinese and Malays), then meta-analyzed. Results Genetically determined shorter LTL was associated with increased risk of CKD in patients with T2D (meta-IVW adjusted odds ratio = 1.51, 95% confidence interval 1.12–2.12, P = 0.007, Phet = 0.547). Similar results were obtained following sensitivity analysis. MR-Egger analysis (intercept) suggested no evidence of horizontal pleiotropy (β = 0.010, P = 0.751). Conclusions Our findings suggest that genetically determined LTL is associated with CKD in patients with T2D. Further studies are warranted to elucidate the causal role of telomere length in CKD progression.
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Affiliation(s)
| | - Rajkumar Dorajoo
- Genome Institute of Singapore, Agency for Science Technology and Research, Singapore
| | - Yiamunaa M
- Clinical Research Unit, Khoo Teck Puat Hospital, Singapore
| | - Ling Wang
- Genome Institute of Singapore, Agency for Science Technology and Research, Singapore
| | - Sylvia Liu
- Clinical Research Unit, Khoo Teck Puat Hospital, Singapore
| | - Jian-Jun Liu
- Clinical Research Unit, Khoo Teck Puat Hospital, Singapore
| | - Yi Ming Shao
- Clinical Research Unit, Khoo Teck Puat Hospital, Singapore
| | - Yuqing Chen
- Saw Swee Hock School of Public Health, Singapore
| | - Xueling Sim
- Saw Swee Hock School of Public Health, Singapore
| | - Keven Ang
- Clinical Research Unit, Khoo Teck Puat Hospital, Singapore
| | | | | | - Chee Fang Sum
- Diabetes Centre, Admiralty Medical Centre, Singapore
| | - Jian-Jun Liu
- Genome Institute of Singapore, Agency for Science Technology and Research, Singapore
| | - Su Chi Lim
- Clinical Research Unit, Khoo Teck Puat Hospital, Singapore
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102
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The relationship between telomere length and putative markers of vascular ageing: A systematic review and meta-analysis. Mech Ageing Dev 2021; 201:111604. [PMID: 34774607 DOI: 10.1016/j.mad.2021.111604] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 11/07/2021] [Accepted: 11/08/2021] [Indexed: 01/07/2023]
Abstract
Accelerated biological aging contributes to the evolution of cardiovascular disease. However, its influence on subclinical organ damage remains unclear. Leukocyte telomere length (LTL) is emerging as a marker of biological cardiovascular aging. We performed a systematic review and meta-analysis to assess the association between LTL and measures of end-organ damage. PubMed, Medline, Embase, Cinahl Plus, ClinicalTrials.gov, and grey literature databases were searched for studies that assessed the association of LTL with arterial pulse wave velocity (aPWV), carotid intima-media thickness (cIMT), left ventricular mass (LVM or LVMI), renal outcomes, coronary artery calcium (CAC) and presence of carotid plaques. In a sample of 7256 patients, we found that cIMT (pooled correlation coefficient (r) = -0.249; 95 %CI -0.37, -0.128) and aPWV (pooled r = -0.194; 95 % CI -0.290, -0.100) inversely correlate with LTL. Compared to aPWV, cIMT had a stronger correlation with LTL. Patients without carotid plaques had longer telomeres than patients with carotid plaques. Quantitative analyses documented LTL association with renal outcomes and CAC, but not with LVM/LVMI. Among measures of end-organ damage, cIMT and aPWV provide the most accurate information on the contribution of biological aging to the process of vascular remodeling/damage.
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103
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Shortened leukocyte telomere length in young adults who use methamphetamine. Transl Psychiatry 2021; 11:519. [PMID: 34628468 PMCID: PMC8502172 DOI: 10.1038/s41398-021-01640-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Revised: 04/08/2021] [Accepted: 04/16/2021] [Indexed: 12/23/2022] Open
Abstract
Methamphetamine (METH) use, most prevalent in young adults, has been associated with high rates of morbidity and mortality. The relationship between METH use and accelerated biological aging, which can be measured using leukocyte telomere length (LTL), remains unclear. We examined whether young adult METH users have shorter LTL and explored the relationship between characteristics of METH use and LTL by using Mendelian randomization (MR) analysis. We compared the LTL for 187 METH users and 159 healthy individuals aged between 25 and 34 years and examined the relationship of LTL with METH use variables (onset age, duration, and maximum frequency of METH use) by using regression analyses. In addition, 2-stage-least-squares (2SLS) MR was also performed to possibly avoid uncontrolled confounding between characteristics of METH use and LTL. We found METH users had significantly shorter LTL compared to controls. Multivariate regression analysis showed METH use was negatively associated with LTL (β = -0.36, P < .001). Among METH users, duration of METH use was negatively associated with LTL after adjustment (β = -0.002, P = .01). We identified a single nucleotide polymorphism (SNP) rs6585206 genome-wide associated with duration of METH use. This SNP was used as an instrumental variable to avoid uncontrolled confounding for the relationship between the use duration and LTL shortening. In conclusion, we show that young adult METH users may have shorter LTL compared with controls and longer duration of METH use was significantly associated with telomere shortening. These observations suggest that METH use may accelerate biological senescence.
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104
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Lohman T, Bains G, Berk L, Lohman E. Predictors of Biological Age: The Implications for Wellness and Aging Research. Gerontol Geriatr Med 2021; 7:23337214211046419. [PMID: 34595331 PMCID: PMC8477681 DOI: 10.1177/23337214211046419] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Revised: 07/14/2021] [Accepted: 08/18/2021] [Indexed: 12/26/2022] Open
Abstract
As healthspan and lifespan research breakthroughs have become more commonplace, the need for valid, practical markers of biological age is becoming increasingly paramount. The accessibility and affordability of biological age predictors that can reveal information about mortality and morbidity risk, as well as remaining years of life, has profound clinical and research implications. In this review, we examine 5 groups of aging biomarkers capable of providing accurate biological age estimations. The unique capabilities of these biomarkers have far reaching implications for the testing of both pharmaceutical and non-pharmaceutical interventions designed to slow or reverse biological aging. Additionally, the enhanced validity and availability of these tools may have increasingly relevant clinical value. The authors of this review explore those implications, with an emphasis on lifestyle modification research, and provide an overview of the current evidence regarding 5 biological age predictor categories: Telomere length, composite biomarkers, DNA methylation “epigenetic clocks,” transcriptional predictors of biological age, and functional age predictors.
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Affiliation(s)
- Trevor Lohman
- School of Allied Health Professions, Loma Linda University, Loma Linda, CA, USA
| | - Gurinder Bains
- School of Allied Health Professions, Loma Linda University, Loma Linda, CA, USA
| | - Lee Berk
- School of Allied Health Professions, Loma Linda University, Loma Linda, CA, USA
| | - Everett Lohman
- School of Allied Health Professions, Loma Linda University, Loma Linda, CA, USA
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105
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Hastings WJ, Eisenberg DTA, Shalev I. Impact of Amplification Efficiency Approaches on Telomere Length Measurement via Quantitative-Polymerase Chain Reaction. Front Genet 2021; 12:728603. [PMID: 34603389 PMCID: PMC8484782 DOI: 10.3389/fgene.2021.728603] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 08/27/2021] [Indexed: 01/09/2023] Open
Abstract
Background: Precise determination of amplification efficiency is critical for reliable conversion of within-sample changes in fluorescence occurring on a logarithmic scale to between-sample differences in DNA content occurring on a linear scale. This endeavor is especially challenging for the telomere length (TL) quantitative-PCR (qPCR) assay, where amplification efficiency can vary between reactions targeting telomeric repeats (T) and those targeting a single-copy gene (S) to calculate TL as the T/S ratio. Methods: We compared seven different approaches toward estimating amplification efficiency, including the standard-curve method utilized by the qPCR instrument software, and alternative approaches which estimate efficiency on a reaction-by-reaction basis using the stand-alone program LinRegPCR. After calculating T/S ratios using efficiency estimates from each approach (N = 363), we tested their relative performance on metrics of assay precision and correlates of external validity including chronological age (age range = 1-72 years), across tissues within-person (leukocyte-buccal), and between parents and offspring. Results: Estimated amplification efficiency for telomere reactions was significantly lower than estimates for single-copy gene reactions. Efficiency estimates for both reaction sets were significantly higher when estimated with the standard-curve method utilized by the qPCR instrument relative to estimates reconstructed during the log-linear phase with LinRegPCR. While estimates of single-copy gene efficiency reconstructed using LinRegPCR measured within 90% of perfect exponential doubling (E = 1.92), estimates generated using the standard-curve method were inflated beyond 100% (E = 2.10-2.12), indicating poor fidelity. Despite differences in raw value, TL measurements calculated with LinRegPCR efficiency estimates exhibited similar relationships with external validity correlates to measurements generated using the qPCR instrument software. Conclusion: Since methods to estimate amplification efficiency can vary across qPCR instruments, we suggest that future analyses empirically consider external methods of efficiency calculations such as LinRegPCR, and that already generated data be re-analyzed to glean possible improvements.
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Affiliation(s)
- Waylon J. Hastings
- Department of Biobehavioral Health, The Pennsylvania State University, University Park, PA, United States
| | - Dan T. A. Eisenberg
- Department of Anthropology, University of Washington, Seattle, WA, United States
| | - Idan Shalev
- Department of Biobehavioral Health, The Pennsylvania State University, University Park, PA, United States
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106
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Rolles B, Gorgulho J, Tometten M, Roderburg C, Vieri M, Abels A, Vucur M, Heymann F, Tacke F, Brümmendorf TH, Luedde T, Beier F, Loosen SH. Telomere Shortening in Peripheral Leukocytes Is Associated With Poor Survival in Cancer Patients Treated With Immune Checkpoint Inhibitor Therapy. Front Oncol 2021; 11:729207. [PMID: 34490122 PMCID: PMC8417059 DOI: 10.3389/fonc.2021.729207] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 08/03/2021] [Indexed: 01/22/2023] Open
Abstract
Background Immune checkpoint inhibitor (ICI) therapy represents a new standard of care for an increasing number of malignancies. Nevertheless, response rates and outcome of ICI treatment vary between individuals and the identification of predictive markers or hints towards immune cell exhaustion during therapy has remained a major challenge. Leukocyte telomere length is an established predictive biomarker of replicative aging and cellular proliferative potential in various hematological diseases. However, its relevance in the context of ICI therapy has not been investigated to date. Here, we analyze the age-adapted delta telomere length (ΔTL) of peripheral leukocytes as a potential predictive and prognostic marker in patients undergoing ICI therapy. Methods Age-adapted delta telomere length (ΔTL) of 84 patients treated with ICIs for solid malignancies was measured via quantitative real-time PCR. ΔTL was correlated with outcome and clinical data. Results ΔTL was not significantly altered between patients with different tumor entities or tumor stages and did not predict tumor response to ICI therapy. However, ΔTLs at initiation of treatment were a prognostic marker for overall survival (OS). When using a calculated ideal cut-off value, the median OS in patients with shorter ΔTL was 5.7 months compared to 18.0 months in patients showing longer ΔTL. The prognostic role of age-adapted ΔTL was further confirmed by uni- and multivariate Cox-regression analyses. Conclusion In the present study, we demonstrate that shorter telomere lengths in peripheral blood leukocytes are associated with a significantly impaired outcome in patients receiving ICI therapy across different malignancies. We explain our findings by hypothesizing an older replicative age in peripheral leukocytes of patients with an impaired overall survival, reflected by a premature TL shortening. Whether this association is ICI-specific remains unknown. Further follow-up studies are needed to provide insights about the exact mechanism of how shortened telomeres eventually affect OS and could help guiding therapeutic decisions in future.
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Affiliation(s)
- Benjamin Rolles
- Department of Hematology, Oncology, Hemostaseology and Stem Cell Transplantation, Medical Faculty, RWTH Aachen University, Aachen, Germany.,Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf (CIO ABCD) , Aachen, Germany
| | - Joao Gorgulho
- Department of Oncology, Haematology and Bone Marrow Transplantation with Section Pneumology, University Hospital Hamburg-Eppendorf, Hamburg, Germany
| | - Mareike Tometten
- Department of Hematology, Oncology, Hemostaseology and Stem Cell Transplantation, Medical Faculty, RWTH Aachen University, Aachen, Germany.,Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf (CIO ABCD) , Aachen, Germany
| | - Christoph Roderburg
- Clinic for Gastroenterology, Hepatology and Infectious Diseases, University Hospital Düsseldorf, Medical Faculty of Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Margherita Vieri
- Department of Hematology, Oncology, Hemostaseology and Stem Cell Transplantation, Medical Faculty, RWTH Aachen University, Aachen, Germany.,Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf (CIO ABCD) , Aachen, Germany
| | - Anne Abels
- Department of Hematology, Oncology, Hemostaseology and Stem Cell Transplantation, Medical Faculty, RWTH Aachen University, Aachen, Germany.,Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf (CIO ABCD) , Aachen, Germany
| | - Mihael Vucur
- Clinic for Gastroenterology, Hepatology and Infectious Diseases, University Hospital Düsseldorf, Medical Faculty of Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Felix Heymann
- Department of Hepatology and Gastroenterology, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Frank Tacke
- Department of Hepatology and Gastroenterology, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Tim H Brümmendorf
- Department of Hematology, Oncology, Hemostaseology and Stem Cell Transplantation, Medical Faculty, RWTH Aachen University, Aachen, Germany.,Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf (CIO ABCD) , Aachen, Germany
| | - Tom Luedde
- Clinic for Gastroenterology, Hepatology and Infectious Diseases, University Hospital Düsseldorf, Medical Faculty of Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Fabian Beier
- Department of Hematology, Oncology, Hemostaseology and Stem Cell Transplantation, Medical Faculty, RWTH Aachen University, Aachen, Germany.,Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf (CIO ABCD) , Aachen, Germany
| | - Sven H Loosen
- Clinic for Gastroenterology, Hepatology and Infectious Diseases, University Hospital Düsseldorf, Medical Faculty of Heinrich Heine University Düsseldorf, Düsseldorf, Germany
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107
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Rattan P, Penrice DD, Ahn JC, Ferrer A, Patnaik M, Shah VH, Kamath PS, Mangaonkar AA, Simonetto DA. Inverse Association of Telomere Length With Liver Disease and Mortality in the US Population. Hepatol Commun 2021; 6:399-410. [PMID: 34558851 PMCID: PMC8793996 DOI: 10.1002/hep4.1803] [Citation(s) in RCA: 129] [Impact Index Per Article: 43.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 07/09/2021] [Accepted: 07/12/2021] [Indexed: 12/27/2022] Open
Abstract
Physiologic aging leads to attrition of telomeres and replicative senescence. An acceleration of this process has been hypothesized in the progression of chronic liver disease. We sought to examine the association of telomere length (TL) with liver disease and its impact on mortality risk. A cohort of 7,072 adults with leukocyte TL measurements from the National Health and Nutrition Examination Survey 1999‐2002 with mortality follow‐up through 2015 was analyzed. Liver disease was defined by aminotransferase levels and classified into etiology‐based and advanced fibrosis categories. Multivariable‐adjusted linear regression models estimated effect sizes, with 95% confidence intervals (CIs), of the presence of liver disease on TL. Cox regression models evaluated associations between TL and all‐cause mortality risk using adjusted hazard ratios (HRs). The cohort was representative of the US population with mean age 46.1 years and mean TL 5.79 kilobase pairs. No overall association between TL and liver disease was found; however, there was a significant negative association of TL and advanced liver fibrosis in individuals aged 65 and above. The liver disease cohort (HR 1.22, 95% CI 0.99‐1.51) and those with metabolic syndrome (HR 1.26, 95% CI 0.96‐1.67) had increased mortality risk with shorter TL. The relationship between TL and all‐cause mortality was stronger in women (HR 1.51, 95% CI 1.02‐2.23) and in non‐Hispanic Whites (HR 1.37, 95% CI 1.02‐1.84). Conclusion: Shortened leukocyte TL is independently associated with advanced liver disease at older ages, and with a higher risk of all‐cause mortality in those with liver disease. These associations reaffirm the need to better understand the role of telomeres in the progression of liver disease.
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Affiliation(s)
- Puru Rattan
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, USA
| | - Daniel D Penrice
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, USA
| | - Joseph C Ahn
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, USA
| | - Alejandro Ferrer
- Center for Individualized Medicine, Health Sciences Research, Mayo Clinic, Rochester, MN, USA
| | | | - Vijay H Shah
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, USA
| | - Patrick S Kamath
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, USA
| | | | - Douglas A Simonetto
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, USA
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108
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Mendes-Silva AP, Vieira ELM, Xavier G, Barroso LSS, Bertola L, Martins EAR, Brietzke EM, Belangero SIN, Diniz BS. Telomere shortening in late-life depression: A potential marker of depression severity. Brain Behav 2021; 11:e2255. [PMID: 34152095 PMCID: PMC8413729 DOI: 10.1002/brb3.2255] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 05/07/2021] [Accepted: 06/05/2021] [Indexed: 02/06/2023] Open
Abstract
OBJECTIVES Telomeres are structures at the extremity of chromosomes that prevents genomic instability, and its shortening seems to be a hallmark of cellular aging. Past studies have shown contradictory results of telomere length (TL) in major depression, and are a few studies in late-life depression (LLD). This explores the association between TL as a molecular marker of aging and diagnosis of LLD, the severity of depressive symptoms, and cognitive performance in older adults. METHODS/DESIGN We included 78 older adults (45 with LLD and 33 nondepressed controls, according to DSM-V criteria), aged 60-90 years. TL was measured in leukocytes by a quantitative polymerase chain reaction, determining the relative ratio (T/S) between the telomere region copy number (T) and a single copy gene (S), using a relative standard curve. RESULTS TL was significantly shorter in the LLD compared with control participants (p = .039). Comparing groups through the severity of depressive symptoms, we found a negative correlation with the severity of depressive symptoms (Hamilton Depression Rating Scale-21, r = -0.325, p = .004) and medical burden (r = -0.271, p = .038). There was no significant correlation between TL and cognitive performance (Mattis Dementia Rating Scale, r = 0.152, p = .21). CONCLUSIONS We found that older adults with LLD have shorter telomere than healthy controls, especially those with a more severe depressive episode. Our findings suggest that shorter TL can be a marker of the severity of depressive episodes in older adults and indicate that these individuals may be at higher risk of age-associated adverse outcomes linked to depression.
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Affiliation(s)
| | | | - Gabriela Xavier
- Department of Morphology and Genetics, Federal University of São Paulo, São Paulo, São Paulo, Brazil.,LINC-Interdisciplinary Laboratory of Clinical Neurosciences, Federal University of São Paulo, São Paulo, São Paulo, Brazil
| | - Lucelia Scarabeli Silva Barroso
- Graduate Program in Molecular Medicine, Federal University of Minas Gerais School of Medicine, Belo Horizonte, Minas Gerais, Brazil
| | - Laiss Bertola
- Graduate Program in Molecular Medicine, Federal University of Minas Gerais School of Medicine, Belo Horizonte, Minas Gerais, Brazil
| | - Efrem Augusto Ribeiro Martins
- Graduate Program in Molecular Medicine, Federal University of Minas Gerais School of Medicine, Belo Horizonte, Minas Gerais, Brazil
| | - Elisa Macedo Brietzke
- Department of Psychiatry, Queen's University School of Medicine, Kingston, Ontario, Canada.,Centre for Neuroscience Studies (CNS), Queen's University, Kingston, Ontario, Canada
| | - Sintia Iole Nogueira Belangero
- Department of Morphology and Genetics, Federal University of São Paulo, São Paulo, São Paulo, Brazil.,LINC-Interdisciplinary Laboratory of Clinical Neurosciences, Federal University of São Paulo, São Paulo, São Paulo, Brazil
| | - Breno Satler Diniz
- Centre for Addiction and Mental Health (CAMH), Toronto, Ontario, Canada.,Department of Psychiatry, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada.,UConn Center on Aging, University of Connecticut Health Center, Farmington, Connecticut, USA.,Department of Psychiatry, University of Connecticut Health Center, Farmington, Connecticut, USA
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109
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Navarro-Mateu F, Husky M, Cayuela-Fuentes P, Álvarez FJ, Roca-Vega A, Rubio-Aparicio M, Chirlaque MD, Cayuela ML, Martínez S, Sánchez-Meca J. The association of telomere length with substance use disorders: a systematic review and meta-analysis of observational studies. Addiction 2021; 116:1954-1972. [PMID: 33140537 DOI: 10.1111/add.15312] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Revised: 07/09/2020] [Accepted: 10/28/2020] [Indexed: 12/18/2022]
Abstract
BACKGROUND AND AIMS Several recent studies have investigated the relationship between telomere length and substance use disorders with inconsistent results. We aimed to assess this association and to identify moderators of the relationship. METHODS Systematic review and meta-analysis. Selection criteria were observational studies reporting telomere length in people with a substance use disorder compared with a control group. Studies focused solely on nicotine addiction, employing other study designs, and non-human studies were excluded. Study selection and data extraction were independently conducted by two researchers following a standardized protocol and included studies until December 2019. Standardized mean differences were used as the effect size index [d; 95% confidence interval (CI)] and random-effects models were used for the meta-analysis. Cochran's Q-statistic, I2 index, visual inspection of the forest plot and a 95% prediction interval were applied to verify study heterogeneity. Subgroup analyses and meta-regressions were conducted to explore heterogeneity. Small study effects were examined using the 'funnel plot', the Egger test, Duval & Tweedie's trim-and-fill method and the precision-effect test-precision-effect estimate with standard error (PET-PEESE) method. The risk of bias and the quality of evidence were assessed. RESULTS Ten studies (12 analysis units with 2671 cases and 4532 controls) met the selection criteria. An overall effect size of moderate magnitude was found (d+ = -0.63; 95% CI = -1.00 and -0.26; P = 0.0008). A potential small study effect was detected, as well as large heterogeneity between studies (Q-statistic P < 0.001, I2 = 97.3%). Selection of controls, reporting laboratory quality control procedures and total sample size significantly affected the effect size. The quality of the evidence was very low, based on risk of bias analysis and the grading of recommendations assessment, development and evaluation (GRADE) system. CONCLUSIONS People with substance use disorders appear to have shorter telomere length than controls; however, this finding should be interpreted with caution due to the poor quality of the evidence.
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Affiliation(s)
- Fernando Navarro-Mateu
- Servicio Murciano de Salud, Unidad de Docencia, Investigación y Formación en Salud Mental (UDIF-SM), Murcia, Spain.,CIBER de Epidemiología y Salud Pública (CIBERESP), Madrid, Spain.,IMIB-Arrixaca, Murcia, Spain.,Departamento de Psicología Básica y Metodología, University of Murcia, Murcia, Spain
| | - Mathilde Husky
- Université de Bordeaux, Laboratoire de Psychologie EA4139, Bordeaux, France
| | - Pedro Cayuela-Fuentes
- Escuela Universitaria de Enfermería de Cartagena, University of Murcia, Murcia, Spain
| | - Francisco-Javier Álvarez
- Servicio Murciano de Salud, Unidad de Docencia, Investigación y Formación en Salud Mental (UDIF-SM), Murcia, Spain
| | - Agustín Roca-Vega
- Biblioteca Virtual MurciaSalud, Centro Tecnológico de Información y Documentación Sanitaria, Servicio Murciano de Salud, Murcia, Spain
| | | | - María Dolores Chirlaque
- CIBER de Epidemiología y Salud Pública (CIBERESP), Madrid, Spain.,IMIB-Arrixaca, Murcia, Spain.,Servicio de Epidemiología, Consejería de Salud, Murcia, Spain.,Departamento de Ciencias Sociosanitarias, University of Murcia, Murcia, Spain
| | - María Luisa Cayuela
- Grupo Telomerasa, Cáncer y Envejecimiento, Hospital Clínico Universitario Virgen de la Arrixaca, Murcia, Spain.,CIBER de Enfermedades Raras (CIBERER), Madrid, Spain
| | - Salvador Martínez
- Instituto de Neurociencias, UMH-CSIC, Alicante, Spain.,and CIBER de Salud Mental (CIBERSAM), Madrid, Spain
| | - Julio Sánchez-Meca
- Departamento de Psicología Básica y Metodología, University of Murcia, Murcia, Spain
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110
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Kodali HP, Borrell LN. Telomere length and mortality risk among adults in the United States: The role of age and race and ethnicity. Ann Epidemiol 2021; 63:68-74. [PMID: 34343614 DOI: 10.1016/j.annepidem.2021.07.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 07/23/2021] [Accepted: 07/26/2021] [Indexed: 10/20/2022]
Abstract
PURPOSE To examine whether there was an association of leucocyte telomere length (LTL) with all-cause, cardiovascular (CVD)- and cancer-specific mortality risks among U.S. adults; and whether these associations vary with race and ethnicity and age. METHODS We conducted a retrospective cohort using data from the National Health and Nutrition Examination Survey, 1999 to 2002 and the 2015 Linked Mortality File on adults 25 years or older (n = 6,526 and 1,753 deaths). Cox proportional hazards regression was used to quantify the association of LTL with each outcome adjusting for baseline sociodemographic and health-related characteristics. We tested a three-way interaction for LTL, race andethnicity, and age groups. RESULTS After adjustment, the rate of dying for all-cause and CVD-specific mortality was at least 24% lower for a 1 kilobase increase in LTL. When compared with adults with the shortest telomere, the rates of dying were at least 17% lower for all-cause and CVD-specific mortality for those with longer telomere. For all-cause mortality, increase LTL was associated with lower rate of dying among non-Hispanic Blacks 45 years or older, and non-Hispanic Whites 65 years or older. CONCLUSIONS We found that increase telomere length was associated with lower all-cause and CVD-specific mortality rates among U.S. adults. For all-cause mortality, this association varies within racial andethnic groups across age groups.
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Affiliation(s)
- Hanish P Kodali
- Department of Epidemiology and Biostatistics, Graduate School of Public Health & Health Policy, City University of New York, New York, NY
| | - Luisa N Borrell
- Department of Epidemiology and Biostatistics, Graduate School of Public Health & Health Policy, City University of New York, New York, NY.
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111
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Ruiz-Narváez EA, Baylin A, Azofeifa J, Leal A, Rosero-Bixby L. Diet and Leukocyte Telomere Length in a Population with Extended Longevity: The Costa Rican Longevity and Healthy Aging Study (CRELES). Nutrients 2021; 13:nu13082585. [PMID: 34444746 PMCID: PMC8401744 DOI: 10.3390/nu13082585] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 07/19/2021] [Accepted: 07/26/2021] [Indexed: 11/16/2022] Open
Abstract
Elderly Costa Ricans have lower mortality rates compared to their counterparts from developed countries. Reasons for this survival advantage are not completely known. In the present study, we aimed to identify dietary factors associated with leukocyte telomere length (LTL), a marker of biologic aging, in the elderly population of Costa Rica. We conducted prospective analysis in 909 participants aged 60+ years from the Costa Rican Longevity and Healthy Aging Study (CRELES). We used a food frequency questionnaire to assess usual diet. We calculated dietary patterns using Principal Component Analysis (PCA). We used generalized linear models to examine the association of dietary patterns and food groups with leukocyte telomere length. We found two major dietary patterns explaining 9.15% and 7.18% of the total variation of food intake, respectively. The first dietary pattern, which represents a traditional Costa Rican rice and beans pattern, was more frequent in rural parts of the country and was positively associated with baseline LTL: β (95% CI) = 42.0 base-pairs (bp) (9.9 bp, 74.1 bp) per one-unit increase of the traditional dietary pattern. In analysis of individual food groups, intake of grains was positively associated with baseline LTL: β (95% CI) = 43.6 bp (13.9 bp, 73.3 bp) per one-serving/day increase of consumption of grains. Our results suggest that dietary factors, in particular a traditional food pattern, are associated with telomere length and may contribute to the extended longevity of elderly Costa Ricans.
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Affiliation(s)
- Edward A. Ruiz-Narváez
- Department of Nutritional Sciences, School of Public Health, University of Michigan, Ann Arbor, MI 48109, USA;
- Correspondence: ; Tel.: +1-734-647-0623
| | - Ana Baylin
- Department of Nutritional Sciences, School of Public Health, University of Michigan, Ann Arbor, MI 48109, USA;
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI 48109, USA
| | - Jorge Azofeifa
- Escuela de Biología, Universidad de Costa Rica, Apartado, San Pedro, San José 11501, Costa Rica; (J.A.); (A.L.)
| | - Alejandro Leal
- Escuela de Biología, Universidad de Costa Rica, Apartado, San Pedro, San José 11501, Costa Rica; (J.A.); (A.L.)
| | - Luis Rosero-Bixby
- Centro Centroamericano de Población, Universidad de Costa Rica, Apartado, San Pedro, San José 11501, Costa Rica;
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112
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Pietri P, Stefanadis C. Cardiovascular Aging and Longevity: JACC State-of-the-Art Review. J Am Coll Cardiol 2021; 77:189-204. [PMID: 33446313 DOI: 10.1016/j.jacc.2020.11.023] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 11/12/2020] [Accepted: 11/13/2020] [Indexed: 12/25/2022]
Abstract
Cardiovascular aging and longevity are interrelated through many pathophysiological mechanisms. Many factors that promote atherosclerotic cardiovascular disease are also implicated in the aging process and vice versa. Indeed, cardiometabolic disorders such as hyperglycemia, insulin resistance, dyslipidemia, and arterial hypertension share common pathophysiological mechanisms with aging and longevity. Moreover, genetic modulators of longevity have a significant impact on cardiovascular aging. The current knowledge of genetic, molecular, and biochemical pathways of aging may serve as a substrate to introduce interventions that might delay cardiovascular aging, thus approaching the goal of longevity. In the present review, the authors describe pathophysiological links between cardiovascular aging and longevity and translate these mechanisms into clinical data by reporting genetic, dietary, and environmental characteristics from long-living populations.
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Affiliation(s)
- Panagiota Pietri
- Athens Medical School, University of Athens, Athens, Greece; Research Institute for Longevity and Aging-related diseases, Athens, Greece
| | - Christodoulos Stefanadis
- Athens Medical School, University of Athens, Athens, Greece; Research Institute for Longevity and Aging-related diseases, Athens, Greece.
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113
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Diebel LWM, Rockwood K. Determination of Biological Age: Geriatric Assessment vs Biological Biomarkers. Curr Oncol Rep 2021; 23:104. [PMID: 34269912 PMCID: PMC8284182 DOI: 10.1007/s11912-021-01097-9] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/20/2021] [Indexed: 12/19/2022]
Abstract
Purpose of Review Biological age is the concept of using biophysiological measures to more accurately determine an individual’s age-related risk of adverse outcomes. Grading of the degree of frailty and measuring biomarkers are distinct methods of measuring biological age. This review compares these strategies for estimating biological age for clinical purposes. Recent Findings The degree of frailty predicts susceptibility to adverse outcomes independently of chronological age. The utility of this approach has been demonstrated across a range of clinical contexts. Biomarkers from various levels of the biological aging process are improving in accuracy, with the potential to identify aberrant aging trajectories before the onset of clinically manifest frailty. Summary Grading of frailty is a demonstrably, clinically, and research-relevant proxy estimate of biological age. Emerging biomarkers can supplement this approach by identifying accelerated aging before it is clinically apparent. Some biomarkers may even offer a means by which interventions to reduce the rate of aging can be developed.
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Affiliation(s)
- Lucas W M Diebel
- Division of Geriatric Medicine, Department of Medicine, Dalhousie University, Nova Scotia Health Authority, Halifax, Canada.,Centre for Health Care of the Elderly, Veterans' Memorial Building, 4121-5955 Veterans' Memorial Lane, Halifax, Nova Scotia, B3H 2E9, Canada
| | - Kenneth Rockwood
- Division of Geriatric Medicine, Department of Medicine, Dalhousie University, Nova Scotia Health Authority, Halifax, Canada. .,Centre for Health Care of the Elderly, Veterans' Memorial Building, 4121-5955 Veterans' Memorial Lane, Halifax, Nova Scotia, B3H 2E9, Canada. .,Department of Medicine, Divisions of Geriatric Medicine & Neurology, Dalhousie University, Nova Scotia Health Authority, Halifax, Canada.
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114
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Marques A, Peralta M, Marconcin P, Henriques-Neto D, Gouveia ÉR, Ferrari G, Martins J, Sarmento H, Ihle A. A Systematic Review of the Association Between Muscular Fitness and Telomere Length Across the Adult Lifespan. Front Physiol 2021; 12:706189. [PMID: 34335309 PMCID: PMC8320389 DOI: 10.3389/fphys.2021.706189] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Accepted: 06/25/2021] [Indexed: 11/24/2022] Open
Abstract
This study aimed to systematically review the association between telomere length (TL) and muscular fitness. In October 2020, an articles search was applied to PubMed, Scopus, and Web of Science. Eligibility criteria included: cross-sectional, prospective, and experimental study design; outcomes included TL; results expressed the relationship between muscular fitness and TL; studies published in English, Portuguese, or Spanish. Nine studies were included in the review. Results from the four prospective studies are mixed. In one study, the changes in TL were associated with grip strength. Another study concluded that longer mid-life TL was associated with increased grip strength later in life. However, in the other two studies, the association between TL and sarcopenia was not strong. Nevertheless, longer TL was associated with a slower decline in grip strength in older people. From the four cross-sectional studies, three indicated that TL was associated with muscular fitness. On the other hand, in a study with powerlifters, TL remained within the range of values found in subjects with no history of regular strength training, supporting the notion that muscular fitness was not associated with TL. The cross-sectional and prospective studies showed that the relationship between TL and muscular fitness is not conclusive. It seems that there is a positive association between TL and muscular fitness in middle-aged and older adults. However, among younger adults, this relationship was not observed.
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Affiliation(s)
- Adilson Marques
- CIPER, Faculty of Human Kinetics, University of Lisbon, Lisbon, Portugal.,ISAMB, University of Lisbon, Lisbon, Portugal
| | - Miguel Peralta
- CIPER, Faculty of Human Kinetics, University of Lisbon, Lisbon, Portugal.,ISAMB, University of Lisbon, Lisbon, Portugal
| | | | | | - Élvio Rúbio Gouveia
- Departamento de Educação Física e Desporto, Universidade da Madeira, Funchal, Portugal.,Interactive Technologies Institute, LARSyS, Funchal, Portugal
| | - Gerson Ferrari
- Laboratorio de Ciencias de la Actividad Física, el Deporte y la Salud, Facultad de Ciencias Medicas, Universidad de Santiago de Chile, Santiago, Chile
| | - João Martins
- CIPER, Faculty of Human Kinetics, University of Lisbon, Lisbon, Portugal
| | - Hugo Sarmento
- University of Coimbra, Research Unit for Sport and Physical Activity (CIDAF) Faculty of Sport Sciences and Physical Education, Coimbra, Portugal
| | - Andreas Ihle
- Center for the Interdisciplinary Study of Gerontology and Vulnerability, University of Geneva, Geneva, Switzerland.,Swiss National Centre of Competence in Research LIVES-Overcoming Vulnerability: Life Course Perspectives, Lausanne and Geneva, Switzerland.,Department of Psychology, University of Geneva, Geneva, Switzerland
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115
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Yeap BB, Hui J, Knuiman MW, Flicker L, Divitini ML, Arscott GM, Twigg SM, Almeida OP, Hankey GJ, Golledge J, Norman PE, Beilby JP. U-Shaped Relationship of Leukocyte Telomere Length With All-Cause and Cancer-Related Mortality in Older Men. J Gerontol A Biol Sci Med Sci 2021; 76:164-171. [PMID: 32761187 DOI: 10.1093/gerona/glaa190] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Telomeres are essential DNA-protein complexes whose attrition results in cellular dysfunction and senescence. Leukocyte telomere length (LTL) correlates with tissue telomere length, representing a biomarker for biological age. However, its predictive value for mortality risk, and for cardiovascular versus cancer deaths, in older adults remains uncertain. METHOD We studied 3608 community-dwelling men aged 77.0 ± 3.6 years. Leukocyte telomere length was measured using multiplex quantitative PCR, expressed as amount of telomeric DNA relative to single-copy control gene (T/S ratio). Deaths from any cause, cardiovascular disease (CVD), and cancer were ascertained using data linkage. Curve fitting used restricted cubic splines and Cox regression analyses adjusted for age, cardiometabolic risk factors, and prevalent disease. RESULTS There was a U-shaped association of LTL with all-cause mortality. Men with T/S ratio in the middle quartiles had lower mortality (quartiles, Q2 vs Q1, hazard ratio [HR] = 0.86, 95% confidence interval [CI] 0.77-0.97, p = .012; Q3 vs Q1 HR = 0.88, CI 0.79-0.99, p = .032). There was no association of LTL with CVD mortality. There was a U-shaped association of LTL with cancer mortality. Men with LTL in the middle quartiles had lower risk of cancer death (Q2 vs Q1, HR = 0.73, CI 0.59-0.90, p = .004; Q3 vs Q1, HR = 0.75, CI 0.61-0.92, p = .007). CONCLUSIONS In older men, both shorter and longer LTL are associated with all-cause mortality. A similar U-shaped association was seen with cancer deaths, with no association found for cardiovascular deaths. Further research is warranted to explore the prognostic utility of LTL in ageing.
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Affiliation(s)
- Bu B Yeap
- Medical School, University of Western Australia, Perth, Australia.,Department of Endocrinology and Diabetes, Fiona Stanley Hospital, Perth, Western Australia, Australia
| | - Jennie Hui
- PathWest Laboratory Medicine, Sir Charles Gairdner Hospital, Perth, Western Australia, Australia
| | - Matthew W Knuiman
- School of Population and Global Health, University of Western Australia, Perth, Australia
| | - Leon Flicker
- Medical School, University of Western Australia, Perth, Australia.,Department of Endocrinology, Sydney Medical School, University of Sydney, New South Wales, Australia
| | - Mark L Divitini
- School of Population and Global Health, University of Western Australia, Perth, Australia
| | - Gillian M Arscott
- PathWest Laboratory Medicine, Sir Charles Gairdner Hospital, Perth, Western Australia, Australia
| | - Stephen M Twigg
- Department of Endocrinology, Sydney Medical School, University of Sydney, New South Wales, Australia
| | - Osvaldo P Almeida
- Medical School, University of Western Australia, Perth, Australia.,WA Centre for Health & Ageing, University of Western Australia, Perth, Australia
| | - Graeme J Hankey
- Medical School, University of Western Australia, Perth, Australia
| | - Jonathan Golledge
- Queensland Research Centre for Peripheral Vascular Disease, James Cook University, and Department of Vascular and Endovascular Surgery, Townsville Hospital, Queensland, Australia
| | - Paul E Norman
- Medical School, University of Western Australia, Perth, Australia
| | - John P Beilby
- PathWest Laboratory Medicine, Sir Charles Gairdner Hospital, Perth, Western Australia, Australia
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116
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Hackenhaar FS, Josefsson M, Adolfsson AN, Landfors M, Kauppi K, Hultdin M, Adolfsson R, Degerman S, Pudas S. Short leukocyte telomeres predict 25-year Alzheimer's disease incidence in non-APOE ε4-carriers. Alzheimers Res Ther 2021; 13:130. [PMID: 34266503 PMCID: PMC8283833 DOI: 10.1186/s13195-021-00871-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Accepted: 06/29/2021] [Indexed: 12/26/2022]
Abstract
BACKGROUND Leukocyte telomere length (LTL) has been shown to predict Alzheimer's disease (AD), albeit inconsistently. Failing to account for the competing risks between AD, other dementia types, and mortality, can be an explanation for the inconsistent findings in previous time-to-event analyses. Furthermore, previous studies indicate that the association between LTL and AD is non-linear and may differ depending on apolipoprotein E (APOE) ε4 allele carriage, the strongest genetic AD predictor. METHODS We analyzed whether baseline LTL in interaction with APOE ε4 predicts AD, by following 1306 initially non-demented subjects for 25 years. Gender- and age-residualized LTL (rLTL) was categorized into tertiles of short, medium, and long rLTLs. Two complementary time-to-event models that account for competing risks were used; the Fine-Gray model to estimate the association between the rLTL tertiles and the cumulative incidence of AD, and the cause-specific hazard model to assess whether the cause-specific risk of AD differed between the rLTL groups. Vascular dementia and death were considered competing risk events. Models were adjusted for baseline lifestyle-related risk factors, gender, age, and non-proportional hazards. RESULTS After follow-up, 149 were diagnosed with AD, 96 were diagnosed with vascular dementia, 465 died without dementia, and 596 remained healthy. Baseline rLTL and other covariates were assessed on average 8 years before AD onset (range 1-24). APOE ε4-carriers had significantly increased incidence of AD, as well as increased cause-specific AD risk. A significant rLTL-APOE interaction indicated that short rLTL at baseline was significantly associated with an increased incidence of AD among non-APOE ε4-carriers (subdistribution hazard ratio = 3.24, CI 1.404-7.462, P = 0.005), as well as borderline associated with increased cause-specific risk of AD (cause-specific hazard ratio = 1.67, CI 0.947-2.964, P = 0.07). Among APOE ε4-carriers, short or long rLTLs were not significantly associated with AD incidence, nor with the cause-specific risk of AD. CONCLUSIONS Our findings from two complementary competing risk time-to-event models indicate that short rLTL may be a valuable predictor of the AD incidence in non-APOE ε4-carriers, on average 8 years before AD onset. More generally, the findings highlight the importance of accounting for competing risks, as well as the APOE status of participants in AD biomarker research.
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Affiliation(s)
- Fernanda Schäfer Hackenhaar
- Department of Integrative Medical Biology, Umeå University, SE-901 87, Umeå, Sweden.
- Umeå Center for Functional Brain Imaging, Umeå University, SE-90 187, Umeå, Sweden.
| | - Maria Josefsson
- Umeå Center for Functional Brain Imaging, Umeå University, SE-90 187, Umeå, Sweden
- Department of Statistics, USBE, Umeå University, SE-901 87, Umeå, Sweden
- Center for Ageing and Demographic Research, Umeå University, SE-901 87, Umeå, Sweden
| | | | - Mattias Landfors
- Department of Medical Biosciences, Pathology, Umeå University, SE-901 85, Umeå, Sweden
| | - Karolina Kauppi
- Department of Integrative Medical Biology, Umeå University, SE-901 87, Umeå, Sweden
- Department of Medical Epidemiology and Biostatistics, Karolinska Institute, SE-171 77, Stockholm, Sweden
| | - Magnus Hultdin
- Department of Medical Biosciences, Pathology, Umeå University, SE-901 85, Umeå, Sweden
| | - Rolf Adolfsson
- Department of Clinical Sciences, Umeå University, SE-901 85, Umeå, Sweden
| | - Sofie Degerman
- Department of Medical Biosciences, Pathology, Umeå University, SE-901 85, Umeå, Sweden
- Department of Clinical Microbiology, Umeå University, SE-901 85, Umeå, Sweden
| | - Sara Pudas
- Department of Integrative Medical Biology, Umeå University, SE-901 87, Umeå, Sweden
- Umeå Center for Functional Brain Imaging, Umeå University, SE-90 187, Umeå, Sweden
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117
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Different epigenetic signatures of newborn telomere length and telomere attrition rate in early life. Aging (Albany NY) 2021; 13:14630-14650. [PMID: 34086604 PMCID: PMC8221291 DOI: 10.18632/aging.203117] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Accepted: 05/17/2021] [Indexed: 12/22/2022]
Abstract
Telomere length (TL) and telomere shortening are biological indicators of aging, and epigenetic associates have been found for TL in adults. However, the role of epigenetic signatures in setting newborn TL and early life telomere dynamics is unknown. In the present study, based on 247 participating newborns from the ENVIRONAGE birth cohort, whole-genome DNA methylation, profiled on the Illumina MethylationEPIC BeadChip microarray, and TL were measured in cord blood. In a follow-up visit at a mean age of 4.58 years, leukocyte TL was evaluated. We combined an epigenome-wide association study and a statistical learning method with re-sampling to select CpGs and their two-way interactions to model baseline (cord blood) TL and early-life telomere attrition rate, where distinct epigenetic signatures were identified for the two outcomes. In addition, a stronger epigenetic regulation was suggested in setting newborn TL than that of telomere dynamics in early life: 47 CpGs and 7 between-CpG interactions explained 76% of the variance in baseline TLs, while 72% of the total variance in telomere attrition rate was explained by 31 CpGs and 5 interactions. Functional enrichment analysis based on the selected CpGs in the two models revealed GLUT4 translocation and immune cell signaling pathways, respectively. These CpGs and interactions, as well as the cellular pathways, are potential novel targets of further investigation of telomere biology and aging.
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118
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Madden RA, McCartney DL, Walker RM, Hillary RF, Bermingham ML, Rawlik K, Morris SW, Campbell A, Porteous DJ, Deary IJ, Evans KL, Hafferty J, McIntosh AM, Marioni RE. Birth weight associations with DNA methylation differences in an adult population. Epigenetics 2021; 16:783-796. [PMID: 33079621 PMCID: PMC8216207 DOI: 10.1080/15592294.2020.1827713] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 09/10/2020] [Accepted: 09/15/2020] [Indexed: 12/13/2022] Open
Abstract
The Developmental Origins of Health and Disease (DOHaD) theory predicts that prenatal and early life events shape adult health outcomes. Birth weight is a useful indicator of the foetal experience and has been associated with multiple adult health outcomes. DNA methylation (DNAm) is one plausible mechanism behind the relationship of birth weight to adult health. Through data linkage between Generation Scotland and historic Scottish birth cohorts, and birth records held through the NHS Information and Statistics Division, a sample of 1,757 individuals with available birth weight and DNAm data was derived. Epigenome-wide association studies (EWAS) were performed in two independently generated DNAm subgroups (nSet1 = 1,395, nSet2 = 362), relating adult DNAm from whole blood to birth weight. Meta-analysis yielded one genome-wide significant CpG site (p = 5.97x10-9), cg00966482. There was minimal evidence for attenuation of the effect sizes for the lead loci upon adjustment for numerous potential confounder variables (body mass index, educational attainment, and socioeconomic status). Associations between birth weight and epigenetic measures of biological age were also assessed. Associations between lower birth weight and higher Grim Age acceleration (p(FDR) = 3.6x10-3) and shorter DNAm-derived telomere length (p(FDR) = 1.7x10-3) are described, although results for three other epigenetic clocks were null. Our results provide support for an association between birth weight and DNAm both locally at one CpG site, and globally via biological ageing estimates.
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Affiliation(s)
- Rebecca A. Madden
- Division of Psychiatry, University of Edinburgh, Royal Edinburgh Hospital, Edinburgh, UK
| | - Daniel L. McCartney
- Centre for Genomic and Experimental Medicine, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK
| | - Rosie M. Walker
- Centre for Genomic and Experimental Medicine, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK
- Centre for Cognitive Ageing and Cognitive Epidemiology, University of Edinburgh, Edinburgh, UK
| | - Robert F. Hillary
- Centre for Genomic and Experimental Medicine, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK
| | - Mairead L. Bermingham
- Centre for Genomic and Experimental Medicine, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK
| | - Konrad Rawlik
- The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Midlothian, UK
| | - Stewart W. Morris
- Centre for Genomic and Experimental Medicine, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK
| | - Archie Campbell
- Centre for Genomic and Experimental Medicine, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK
| | - David J. Porteous
- Centre for Genomic and Experimental Medicine, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK
- Centre for Cognitive Ageing and Cognitive Epidemiology, University of Edinburgh, Edinburgh, UK
| | - Ian J. Deary
- Centre for Cognitive Ageing and Cognitive Epidemiology, University of Edinburgh, Edinburgh, UK
- Department of Psychology, University of Edinburgh, Edinburgh, UK
| | - Kathryn L. Evans
- Centre for Genomic and Experimental Medicine, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK
- Centre for Cognitive Ageing and Cognitive Epidemiology, University of Edinburgh, Edinburgh, UK
| | - Jonathan Hafferty
- Division of Psychiatry, University of Edinburgh, Royal Edinburgh Hospital, Edinburgh, UK
| | - Andrew M. McIntosh
- Division of Psychiatry, University of Edinburgh, Royal Edinburgh Hospital, Edinburgh, UK
- Centre for Genomic and Experimental Medicine, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK
- Centre for Cognitive Ageing and Cognitive Epidemiology, University of Edinburgh, Edinburgh, UK
| | - Riccardo E. Marioni
- Centre for Genomic and Experimental Medicine, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK
- Centre for Cognitive Ageing and Cognitive Epidemiology, University of Edinburgh, Edinburgh, UK
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119
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Tsai CW, Chang WS, Xu J, Xu Y, Huang M, Pettaway C, Bau DT, Gu J. Leukocyte telomere length is associated with aggressive prostate cancer in localized African American prostate cancer patients. Carcinogenesis 2021; 41:1213-1218. [PMID: 32614411 DOI: 10.1093/carcin/bgaa070] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 06/19/2020] [Accepted: 06/26/2020] [Indexed: 01/03/2023] Open
Abstract
Telomeres play important roles in cancer initiation and progression. Leukocyte telomere length (LTL) has been associated with the risk and prognosis of several cancers, but its association with prostate cancer (PCa) prognosis in African Americans (AAs) has not been reported. In this study, we measured relative LTL from 317 AA PCa patients and assessed its associations with aggressive disease characteristics at diagnosis and biochemical recurrence (BCR) after radical prostatectomy and radiotherapy. LTL was shorter in patients with higher Gleason scores (GS) at diagnosis. Dichotomized into short and long LTL groups, patients with short LTL exhibited a 1.91-fold (95% confidence interval, CI, 1.14-3.20, P = 0.013) increased risk of being diagnosed with high-risk disease (GS =7 [4 + 3] and GS ≥8) than those with long LTL in multivariable logistic regression analysis. Moreover, shorter LTL was significantly associated with an increased risk of BCR (hazard ratio = 1.68, 95% CI, 1.18-11.44, P = 0.024) compared with longer LTL in localized patients receiving prostatectomy or radiotherapy in multivariable Cox analysis. Kaplan-Meier survival analysis showed patients with short LTL had significantly shorter BCR-free survival time than patients with long LTL (Log rank P = 0.011). In conclusion, our results showed for the first time that LTL was shorter in PCa patients with higher GS and short LTL was associated with worse prognosis in AA PCa patients receiving prostatectomy or radiotherapy.
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Affiliation(s)
- Chia-Wen Tsai
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
- Terry Fox Cancer Research Laboratory, China Medical University Hospital, Taichung, Taiwan
| | - Wen-Shin Chang
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
- Terry Fox Cancer Research Laboratory, China Medical University Hospital, Taichung, Taiwan
| | - Junfeng Xu
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Yifan Xu
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Maosheng Huang
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Curtis Pettaway
- Department of Urology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Da-Tian Bau
- Terry Fox Cancer Research Laboratory, China Medical University Hospital, Taichung, Taiwan
- Department of Bioinformatics and Medical Engineering, Asia University, Taichung, Taiwan
| | - Jian Gu
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
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120
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Castro-Diehl C, Ehrbar R, Obas V, Oh A, Vasan RS, Xanthakis V. Biomarkers representing key aging-related biological pathways are associated with subclinical atherosclerosis and all-cause mortality: The Framingham Study. PLoS One 2021; 16:e0251308. [PMID: 33989340 PMCID: PMC8121535 DOI: 10.1371/journal.pone.0251308] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Accepted: 04/24/2021] [Indexed: 01/14/2023] Open
Abstract
BACKGROUND Increased oxidative stress, leukocyte telomere length (LTL) shortening, endothelial dysfunction, and lower insulin-like growth factor (IGF)-1 concentrations reflect key molecular mechanisms of aging. We hypothesized that biomarkers representing these pathways are associated with measures of subclinical atherosclerosis and all-cause mortality. METHODS AND RESULTS We evaluated up to 2,314 Framingham Offspring Study participants (mean age 61 years, 55% women) with available biomarkers of aging: LTL, circulating concentrations of IGF-1, asymmetrical dimethylarginine (ADMA), and urinary F2-Isoprostanes indexed to urinary creatinine. We evaluated the association of each biomarker with coronary artery calcium [ln (CAC+1)] and carotid intima-media thickness (IMT). In multivariable-adjusted linear regression models, higher ADMA levels were associated with higher CAC values (βADMA per 1-SD increase 0.25; 95% confidence interval [CI] [0.11, 0.39]). Additionally, shorter LTL and lower IGF-1 values were associated with higher IMT values (βLTL -0.08, 95%CI -0.14, -0.02, and βIGF-1 -0.04, 95%CI -0.08, -0.01, respectively). During a median follow-up of 15.5 years, 593 subjects died. In multivariable-adjusted Cox regression models, LTL and IGF-1 values were inversely associated with all-cause mortality (hazard ratios [HR] per SD increase in biomarker, 0.85, 95% CI 0.74-0.99, and 0.90, 95% CI 0.82-0.98 for LTL and IGF-1, respectively). F2-Isoprostanes and ADMA values were positively associated with all-cause mortality (HR per SD increase in biomarker, 1.15, 95% CI, 1.10-1.22, and 1.10, 95% CI, 1.02-1.20, respectively). CONCLUSION In our prospective community-based study, aging-related biomarkers were associated with measures of subclinical atherosclerosis cross-sectionally and with all-cause mortality prospectively, supporting the concept that these biomarkers may reflect the aging process in community-dwelling adults.
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Affiliation(s)
- Cecilia Castro-Diehl
- Department of Medicine, Section of Preventive Medicine and Epidemiology, Boston University School of Medicine, Boston, Massachusetts, United States of America
| | - Rachel Ehrbar
- Department of Biostatistics, Boston University School of Public Health, Boston, Massachusetts, United States of America
| | - Vanesa Obas
- Department of Medicine, Internal Medicine Residency Program, Boston University School of Medicine, Boston, Massachusetts, United States of America
| | - Albin Oh
- Department of Medicine, Internal Medicine Residency Program, Boston University School of Medicine, Boston, Massachusetts, United States of America
| | - Ramachandran S. Vasan
- Department of Medicine, Section of Preventive Medicine and Epidemiology, Boston University School of Medicine, Boston, Massachusetts, United States of America
- Lung, and Blood Institute’s Framingham Heart Study, Boston University’s and National Heart, Framingham, Massachusetts, United States of America
- Department of Medicine, Section of Cardiology, Boston University School of Medicine, Boston, Massachusetts, United States of America
- Department of Epidemiology, Boston University School of Public Health, Boston, Massachusetts, United States of America
| | - Vanessa Xanthakis
- Department of Medicine, Section of Preventive Medicine and Epidemiology, Boston University School of Medicine, Boston, Massachusetts, United States of America
- Department of Biostatistics, Boston University School of Public Health, Boston, Massachusetts, United States of America
- Lung, and Blood Institute’s Framingham Heart Study, Boston University’s and National Heart, Framingham, Massachusetts, United States of America
- * E-mail:
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Hägg S, Jylhävä J. Sex differences in biological aging with a focus on human studies. eLife 2021; 10:e63425. [PMID: 33982659 PMCID: PMC8118651 DOI: 10.7554/elife.63425] [Citation(s) in RCA: 152] [Impact Index Per Article: 50.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Accepted: 05/04/2021] [Indexed: 02/06/2023] Open
Abstract
Aging is a complex biological process characterized by hallmark features accumulating over the life course, shaping the individual's aging trajectory and subsequent disease risks. There is substantial individual variability in the aging process between men and women. In general, women live longer than men, consistent with lower biological ages as assessed by molecular biomarkers, but there is a paradox. Women are frailer and have worse health at the end of life, while men still perform better in physical function examinations. Moreover, many age-related diseases show sex-specific patterns. In this review, we aim to summarize the current knowledge on sexual dimorphism in human studies, with support from animal research, on biological aging and illnesses. We also attempt to place it in the context of the theories of aging, as well as discuss the explanations for the sex differences, for example, the sex-chromosome linked mechanisms and hormonally driven differences.
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Affiliation(s)
- Sara Hägg
- Department of Medical Epidemiology and Biostatistics, Karolinska InstitutetStockholmSweden
| | - Juulia Jylhävä
- Department of Medical Epidemiology and Biostatistics, Karolinska InstitutetStockholmSweden
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Habibi N, Bianco-Miotto T, Phoi YY, Jankovic-Karasoulos T, Roberts CT, Grieger JA. Maternal diet and offspring telomere length: a systematic review. Nutr Rev 2021; 79:148-159. [PMID: 32968801 DOI: 10.1093/nutrit/nuaa097] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
CONTEXT Many studies assert a negative influence of inappropriate maternal diet and nutritional status during pregnancy on offspring, not only in utero but throughout life, because of the role in the programing of noncommunicable diseases. Telomere length is a biomarker of aging, and shorter telomeres are associated with chronic disease later in life. Maternal nutrition and nutritional status may be an important determinant of offspring telomere length. OBJECTIVE A systematic review was conducted to determine the effect of maternal nutrition and nutritional status in pregnancy on offspring telomere length. DATA SOURCES This systematic review was conducted according to PRISMA guidelines. Database searches of PubMed, CINAHL, Scopus, Medline, and Web of Science were performed. STUDY SELECTION Included studies assessed the association between maternal nutrition (dietary intake and nutritional status) during pregnancy and offspring telomere length measured in cord blood, serum, plasma, and peripheral blood mononuclear cells. DATA EXTRACTION Three authors screened and determined the quality of the articles; disagreements were resolved by a fourth author. All authors compared the compiled data. RESULTS Seven studies were extracted and evaluated. Studies comprised a double-blind placebo-controlled trial (n = 1), prospective cohort studies (n = 5), and a cross-sectional study (n = 1). Higher circulating maternal folate and 25-hydroxyvitamin D3 concentrations, along with higher maternal dietary caffeine intakes, were associated with longer offspring telomere length, whereas higher dietary intake of carbohydrate, folate, n-3 polyunsaturated fatty acids, vitamin C, or sodium was not. CONCLUSION The limited but suggestive evidence highlights the need for further research to be conducted in this area, particularly longitudinal studies involving larger cohorts of pregnant women. SYSTEMATIC REVIEW REGISTRATION PROSPERO registration no. CRD42019136506.
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Affiliation(s)
- Nahal Habibi
- School of Agriculture, Food and Wine, Waite Research Institute, University of Adelaide, Adelaide, South Australia, Australia.,Robinson Research Institute, University of Adelaide, Adelaide, South Australia, Australia
| | - Tina Bianco-Miotto
- School of Agriculture, Food and Wine, Waite Research Institute, University of Adelaide, Adelaide, South Australia, Australia.,Robinson Research Institute, University of Adelaide, Adelaide, South Australia, Australia
| | - Yan Yin Phoi
- School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, South Australia, Australia
| | - Tanja Jankovic-Karasoulos
- Robinson Research Institute, University of Adelaide, Adelaide, South Australia, Australia.,Adelaide Medical School, University of Adelaide, Adelaide, South Australia, Australia.,Flinders Health and Medical Research Institute, Flinders University, Bedford Park, South Australia, Australia
| | - Claire T Roberts
- Robinson Research Institute, University of Adelaide, Adelaide, South Australia, Australia.,Adelaide Medical School, University of Adelaide, Adelaide, South Australia, Australia.,Flinders Health and Medical Research Institute, Flinders University, Bedford Park, South Australia, Australia
| | - Jessica A Grieger
- Robinson Research Institute, University of Adelaide, Adelaide, South Australia, Australia.,Adelaide Medical School, University of Adelaide, Adelaide, South Australia, Australia
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Mitochondrial Dysfunction Contributes to Aging-Related Atrial Fibrillation. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:5530293. [PMID: 34007402 PMCID: PMC8102104 DOI: 10.1155/2021/5530293] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 04/04/2021] [Accepted: 04/15/2021] [Indexed: 11/17/2022]
Abstract
The incidence of atrial fibrillation (AF) increases with age, and telomere length gradually shortens with age. However, whether telomere length is related to AF is still inconclusive, and the exact mechanism by which aging causes the increased incidence of AF is still unclear. We hypothesize that telomere length is correlated with aging-related AF and that mitochondrial dysfunction plays a role in this. This research recruited 96 elderly male patients with AF who were admitted to the Second Medical Center of Chinese PLA General Hospital from April to October 2018. After matching by age and gender, 96 non-AF elderly male patients who were admitted to the hospital for physical examination during the same period were selected as controls. Anthropometric, clinical, and laboratory analyses were performed on all subjects. The mitochondrial membrane potential (MMP) of peripheral blood leukocytes was detected as the indicator of mitochondrial function. Compared with the control group, the leukocyte telomere length (LTL) was significantly shorter (P < 0.001), and the level of PGC-1α in serum was significantly lower in AF patients. Additionally, in subjects without any other diseases, the AF patients had lower MMP when compared with the control. Multivariate logistic regression confirmed that LTL (OR 0.365; 95% CI 0.235-0.568; P < 0.001) and serum PGC-1α (OR 0.993; 95% CI 0.988-0.997; P = 0.002) were inversely associated with the presence of AF. In addition, ROC analysis indicated the potential diagnostic value of LTL and serum PGC-1α with AUC values of 0.734 and 0.633, respectively. This research concludes that LTL and serum PGC-1α are inversely correlated with the occurrence of aging-related AF and that mitochondrial dysfunction plays a role in this.
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Romaine SPR, Denniff M, Codd V, Nath M, Koekemoer A, Anker SD, Cleland JG, Filippatos G, Levin D, Metra M, Mordi IR, Ouwerkerk W, Ter Maaten JM, van Veldhuisen DJ, Zannad F, Ng LL, van der Harst P, Lang CC, Voors AA, Nelson CP, Samani NJ. Telomere length is independently associated with all-cause mortality in chronic heart failure. Heart 2021; 108:124-129. [PMID: 33789973 DOI: 10.1136/heartjnl-2020-318654] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Revised: 02/25/2021] [Accepted: 03/01/2021] [Indexed: 11/04/2022] Open
Abstract
OBJECTIVE Patients with heart failure have shorter mean leucocyte telomere length (LTL), a marker of biological age, compared with healthy subjects, but it is unclear whether this is of prognostic significance. We therefore sought to determine whether LTL is associated with outcomes in patients with heart failure. METHODS We measured LTL in patients with heart failure from the BIOSTAT-CHF Index (n=2260) and BIOSTAT-CHF Tayside (n=1413) cohorts. Cox proportional hazards analyses were performed individually in each cohort and the estimates combined using meta-analysis. Our co-primary endpoints were all-cause mortality and heart failure hospitalisation. RESULTS In age-adjusted and sex-adjusted analyses, shorter LTL was associated with higher all-cause mortality in both cohorts individually and when combined (meta-analysis HR (per SD decrease in LTL)=1.16 (95% CI 1.08 to 1.24); p=2.66×10-5), an effect equivalent to that of being four years older. The association remained significant after adjustment for the BIOSTAT-CHF clinical risk score to account for known prognostic factors (HR=1.12 (95% CI 1.05 to 1.20); p=1.04×10-3). Shorter LTL was associated with both cardiovascular (HR=1.09 (95% CI 1.00 to 1.19); p=0.047) and non-cardiovascular deaths (HR=1.18 (95% CI 1.05 to 1.32); p=4.80×10-3). There was no association between LTL and heart failure hospitalisation (HR=0.99 (95% CI 0.92 to 1.07); p=0.855). CONCLUSION In patients with heart failure, shorter mean LTL is independently associated with all-cause mortality.
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Affiliation(s)
- Simon P R Romaine
- Department of Cardiovascular Sciences, University of Leicester, Leicester, UK .,NIHR Leicester Biomedical Research Centre, Glenfield Hospital, Leicester, UK
| | - Matthew Denniff
- Department of Cardiovascular Sciences, University of Leicester, Leicester, UK
| | - Veryan Codd
- Department of Cardiovascular Sciences, University of Leicester, Leicester, UK.,NIHR Leicester Biomedical Research Centre, Glenfield Hospital, Leicester, UK
| | - Mintu Nath
- Department of Cardiovascular Sciences, University of Leicester, Leicester, UK.,Institute of Applied Health Sciences, University of Aberdeen, Aberdeen, UK
| | - Andrea Koekemoer
- Department of Cardiovascular Sciences, University of Leicester, Leicester, UK.,NIHR Leicester Biomedical Research Centre, Glenfield Hospital, Leicester, UK
| | - Stefan D Anker
- Department of Cardiology (CVK) and Berlin Institute of Health Center for Regenerative Therapies (BCRT), German Centre for Cardiovascular Research (DZHK) partner site Berlin, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - John G Cleland
- Robertson Centre for Biostatistics and Clinical Trials Unit, University of Glasgow, Glasgow, UK.,National Heart and Lung Institute, Royal Brompton and Harefield Hospitals, Imperial College London, London, UK
| | - Gerasimos Filippatos
- School of Medicine, National and Kapodistian University of Athens, Athens, Greece.,School of Medicine, University of Cyprus, Nicosia, Cyprus
| | - Daniel Levin
- Division of Population Health and Genomics, School of Medicine, University of Dundee, Dundee, UK
| | - Marco Metra
- Cardiology, University of Brescia, Brescia, Italy
| | - Ify R Mordi
- Division of Molecular & Clinical Medicine, Ninewells Hospital, University of Dundee, Dundee, Angus, UK
| | - Wouter Ouwerkerk
- Department of Dermatology, Infection and Immunity, Amsterdam UMC, location Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands.,National Heart Centre Singapore, Singapore
| | - Jozine M Ter Maaten
- Department of Cardiology, University of Groningen, University Medical Center of Groningen, Groningen, The Netherlands
| | - Dirk J van Veldhuisen
- Department of Cardiology, University of Groningen, University Medical Center of Groningen, Groningen, The Netherlands
| | - Faiez Zannad
- Clinical investigation Center CIC1433, Université de Lorraine, Nancy, France.,Clinical investigation Center CIC1433, CHRU Nancy, Vandoeuvre les Nancy, France.,FCRIN INI-CRCT, Inserm, Vandoeuvre les Nancy, France
| | - Leong L Ng
- Department of Cardiovascular Sciences, University of Leicester, Leicester, UK
| | - Pim van der Harst
- Department of Cardiology, University of Groningen, University Medical Center of Groningen, Groningen, The Netherlands
| | - Chim C Lang
- Cardiology, Ninewells Hospital and Medical School, Dundee, UK
| | - Adriaan A Voors
- Department of Cardiology, University of Groningen, University Medical Center of Groningen, Groningen, The Netherlands
| | - Christopher P Nelson
- Department of Cardiovascular Sciences, University of Leicester, Leicester, UK.,NIHR Leicester Biomedical Research Centre, Glenfield Hospital, Leicester, UK
| | - Nilesh J Samani
- Department of Cardiovascular Sciences, University of Leicester, Leicester, UK.,NIHR Leicester Biomedical Research Centre, Glenfield Hospital, Leicester, UK
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125
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Garfein J, Flannagan KS, Rittman D, Ramirez-Zea M, Villamor E. Leukocyte telomere length is inversely associated with a metabolic risk score in Mesoamerican children. Am J Hum Biol 2021; 34:e23596. [PMID: 33720476 DOI: 10.1002/ajhb.23596] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 02/23/2021] [Accepted: 02/27/2021] [Indexed: 12/19/2022] Open
Abstract
OBJECTIVE Leukocyte telomere length (LTL) may be involved in the etiology of the metabolic syndrome (MetS). We examined the associations of LTL with MetS and its components among Mesoamerican children and their adult parents, in a region where MetS prevalence is high. METHODS We conducted a cross-sectional study of 151 children aged 7-12 years and 346 parents from the capitals of Belize, Honduras, Nicaragua, Costa Rica, Panama, and Chiapas State, Mexico. We quantified LTL by qPCR on DNA extracted from whole blood. In children, we created an age- and sex-standardized metabolic risk score using waist circumference (WC), the homeostasis model of insulin resistance (HOMA-IR), blood pressure, serum high-density lipoprotein (HDL) cholesterol, and serum triglycerides. In adults, MetS was defined according to the National Cholesterol Education Program's Adult Treatment Panel III definition. We estimated mean differences in metabolic risk score and prevalence ratios of MetS across quartiles of LTL using multivariable-adjusted linear and Poisson regression models, respectively. RESULTS In children, every 1 LTL z-score was related to an adjusted 0.05 units lower (95% CI: -0.09, -0.02, P = 0.005) MetS risk score, through WC, HOMA-IR, and HDL. Among adults, LTL was not associated with MetS prevalence; however, every 1 LTL z-score was associated with an adjusted 34% lower prevalence of high fasting glucose (95% CI: 3%, 55%, p = .03). CONCLUSIONS Among Mesoamerican children, LTL is associated with an improved metabolic profile; among adults, LTL is inversely associated with the prevalence of high fasting glucose.
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Affiliation(s)
- Joshua Garfein
- Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor, Michigan, USA
| | - Kerry S Flannagan
- Eunice Kennedy Shriver National Institute of Child Health and Development, Rockville, Maryland, USA
| | - Danielle Rittman
- Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor, Michigan, USA
| | - Manuel Ramirez-Zea
- INCAP Research Center for the Prevention of Chronic Diseases (CIIPEC), Institute of Nutrition of Central America and Panama, Guatemala City, Guatemala
| | - Eduardo Villamor
- Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor, Michigan, USA
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126
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Yu G, Lu L, Ma Z, Wu S. Genetically Predicted Telomere Length and Its Relationship With Alzheimer's Disease. Front Genet 2021; 12:595864. [PMID: 33679878 PMCID: PMC7934420 DOI: 10.3389/fgene.2021.595864] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Accepted: 01/19/2021] [Indexed: 01/25/2023] Open
Abstract
Are shorter telomeres causal risk factors for Alzheimer’s disease (AD)? This study aimed to examine if shorter telomeres were causally associated with a higher risk of AD using Mendelian randomization (MR) analysis. Two-sample MR methods were applied to the summary effect sizes and standard errors from a genome-wide association study for AD. Twenty single nucleotide polymorphisms of genome-wide significance were selected as instrumental variables for leukocyte telomere length. The main analyses were performed primarily using the random-effects inverse-variance weighted method and complemented with the other three methods: weighted median approaches, MR-Egger regression, and weighted mode approach. The intercept of MR-Egger regression was used to assess horizontal pleiotropy. We found that longer telomeres were associated with lower risks of AD (odds ratio = 0.79, 95% confidence interval: 0.67, 0.93, P = 0.004). Comparable results were obtained using weighted median approaches, MR-Egger regression, and weighted mode approaches. The intercept of the MR-Egger regression was close to zero. This may show that there was not suggestive of horizontal pleiotropy. Our findings provided additional evidence regarding the putative causal association between shorter telomere length and the higher risk of AD.
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Affiliation(s)
- Guangping Yu
- Wuqing Center for Disease Control and Prevention, Tianjin, China
| | | | - Zaihong Ma
- Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Shouhai Wu
- The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
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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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Jansen R, Han LKM, Verhoeven JE, Aberg KA, van den Oord ECGJ, Milaneschi Y, Penninx BWJH. An integrative study of five biological clocks in somatic and mental health. eLife 2021; 10:e59479. [PMID: 33558008 PMCID: PMC7872513 DOI: 10.7554/elife.59479] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Accepted: 12/14/2020] [Indexed: 02/06/2023] Open
Abstract
Biological clocks have been developed at different molecular levels and were found to be more advanced in the presence of somatic illness and mental disorders. However, it is unclear whether different biological clocks reflect similar aging processes and determinants. In ~3000 subjects, we examined whether five biological clocks (telomere length, epigenetic, transcriptomic, proteomic, and metabolomic clocks) were interrelated and associated to somatic and mental health determinants. Correlations between biological aging indicators were small (all r < 0.2), indicating little overlap. The most consistent associations of advanced biological aging were found for male sex, higher body mass index (BMI), metabolic syndrome, smoking, and depression. As compared to the individual clocks, a composite index of all five clocks showed most pronounced associations with health determinants. The large effect sizes of the composite index and the low correlation between biological aging indicators suggest that one's biological age is best reflected by combining aging measures from multiple cellular levels.
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Affiliation(s)
- Rick Jansen
- Department of Psychiatry, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam Public Health Research Institute and Amsterdam NeuroscienceAmsterdamNetherlands
| | - Laura KM Han
- Department of Psychiatry, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam Public Health Research Institute and Amsterdam NeuroscienceAmsterdamNetherlands
| | - Josine E Verhoeven
- Department of Psychiatry, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam Public Health Research Institute and Amsterdam NeuroscienceAmsterdamNetherlands
| | - Karolina A Aberg
- Center for Biomarker Research and Precision Medicine, Virginia Commonwealth UniversityRichmondUnited States
| | - Edwin CGJ van den Oord
- Center for Biomarker Research and Precision Medicine, Virginia Commonwealth UniversityRichmondUnited States
| | - Yuri Milaneschi
- Department of Psychiatry, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam Public Health Research Institute and Amsterdam NeuroscienceAmsterdamNetherlands
| | - Brenda WJH Penninx
- Department of Psychiatry, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam Public Health Research Institute and Amsterdam NeuroscienceAmsterdamNetherlands
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Verner G, Epel E, Lahti-Pulkkinen M, Kajantie E, Buss C, Lin J, Blackburn E, Räikkönen K, Wadhwa PD, Entringer S. Maternal Psychological Resilience During Pregnancy and Newborn Telomere Length: A Prospective Study. Am J Psychiatry 2021; 178:183-192. [PMID: 32911996 PMCID: PMC7855094 DOI: 10.1176/appi.ajp.2020.19101003] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
OBJECTIVE In the context of the importance of elucidating the determinants of the initial, newborn setting of telomere length (TL), it is increasingly evident that maternal stress and stress-related processes during pregnancy play a major role. Although psychological resilience may function as a buffer, research in this area has not yet examined its potential role vis-à-vis that of stress. The authors examined the relationship between maternal psychological resilience during pregnancy and newborn TL. METHODS In a sample of 656 mother-child dyads from the Prediction and Prevention of Preeclampsia and Intrauterine Growth Restriction cohort, multiple serial assessments were conducted over the course of pregnancy to quantify maternal stress, negative and positive emotional responses to pregnancy events, positive affect, and perceived social support. Principal component analysis identified two latent factors: stress and positivity. A measure of resilience was computed by regressing the positivity factor on the stress factor, in order to quantify positivity after accounting for stress. TL was measured using quantitative polymerase chain reaction in leukocytes extracted from cord blood shortly after birth. Linear regression was used to predict newborn TL from maternal resilience during pregnancy, adjusting for other potential determinants. RESULTS Maternal stress significantly predicted shorter newborn TL (β=-0.079), and positivity significantly predicted longer TL (β=0.135). Maternal resilience (positivity accounting for stress) was significantly and positively associated with newborn TL (β=0.114, 95% CI=0.035, 0.189), with each standard deviation increase in resilience predicting 12% longer newborn TL. CONCLUSIONS The results indicate that maternal psychological resilience may exert a salubrious effect on offspring telomere biology and highlight the importance of enhancing maternal mental health and well-being during pregnancy.
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Affiliation(s)
- Glenn Verner
- Charité – Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health (BIH), Institute of Medical Psychology, Berlin, Germany
| | - Elissa Epel
- Department of Psychiatry, San Francisco School of Medicine, University of California, San Francisco, California, USA
| | | | - Eero Kajantie
- Department of Public Health Solutions, THL National Institute for Health and Welfare, Helsinki and Oulu, Finland,PEDEGO Research Unit, MRC Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland,Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway,Children’s Hospital, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
| | - Claudia Buss
- Charité – Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health (BIH), Institute of Medical Psychology, Berlin, Germany,Department of Pediatrics, University of California, Irvine, Irvine, California,UC Irvine Development, Health and Disease Research Program, University of California, Irvine, Irvine, California
| | - Jue Lin
- Department of Biochemistry and Biophysics, University of California, San Francisco, California, USA
| | - Elizabeth Blackburn
- Department of Biochemistry and Biophysics, University of California, San Francisco, California, USA,Department of Microbiology and Immunology, University of California, San Francisco, California, USA
| | - Katri Räikkönen
- Department of Psychology and Logopedics, University of Helsinki, Finland
| | - Pathik D. Wadhwa
- Department of Pediatrics, University of California, Irvine, Irvine, California,UC Irvine Development, Health and Disease Research Program, University of California, Irvine, Irvine, California,Department of Psychiatry & Human Behavior, University of California, Irvine, School of Medicine, Irvine, California, USA,Department of Obstetrics & Gynecology, University of California, Irvine, School of Medicine, Irvine, California, USA,Department of Epidemiology, University of California, Irvine, School of Medicine, Irvine, California, USA
| | - Sonja Entringer
- Charité – Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health (BIH), Institute of Medical Psychology, Berlin, Germany,Department of Pediatrics, University of California, Irvine, Irvine, California,UC Irvine Development, Health and Disease Research Program, University of California, Irvine, Irvine, California
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130
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Vaiserman A, Krasnienkov D. Telomere Length as a Marker of Biological Age: State-of-the-Art, Open Issues, and Future Perspectives. Front Genet 2021; 11:630186. [PMID: 33552142 PMCID: PMC7859450 DOI: 10.3389/fgene.2020.630186] [Citation(s) in RCA: 172] [Impact Index Per Article: 57.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Accepted: 12/21/2020] [Indexed: 12/21/2022] Open
Abstract
Telomere shortening is a well-known hallmark of both cellular senescence and organismal aging. An accelerated rate of telomere attrition is also a common feature of age-related diseases. Therefore, telomere length (TL) has been recognized for a long time as one of the best biomarkers of aging. Recent research findings, however, indicate that TL per se can only allow a rough estimate of aging rate and can hardly be regarded as a clinically important risk marker for age-related pathologies and mortality. Evidence is obtained that other indicators such as certain immune parameters, indices of epigenetic age, etc., could be stronger predictors of the health status and the risk of chronic disease. However, despite these issues and limitations, TL remains to be very informative marker in accessing the biological age when used along with other markers such as indices of homeostatic dysregulation, frailty index, epigenetic clock, etc. This review article is aimed at describing the current state of the art in the field and at discussing recent research findings and divergent viewpoints regarding the usefulness of leukocyte TL for estimating the human biological age.
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Affiliation(s)
- Alexander Vaiserman
- Laboratory of Epigenetics, D.F. Chebotarev Institute of Gerontology, Kyiv, Ukraine
| | - Dmytro Krasnienkov
- Laboratory of Epigenetics, D.F. Chebotarev Institute of Gerontology, Kyiv, Ukraine
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131
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Telomere length shortening in hospitalized preterm infants: A pilot study. PLoS One 2021; 16:e0243468. [PMID: 33471805 PMCID: PMC7817026 DOI: 10.1371/journal.pone.0243468] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 11/21/2020] [Indexed: 12/18/2022] Open
Abstract
Leukocyte telomere length is a biomarker of aging-related health risks. Hospitalized preterm infants frequently experience elevated oxidative stress and inflammation, both of which contribute to telomere shortening. Our aim was to examine changes in telomere length during neonatal intensive care unit (NICU) hospitalization in a cohort of preterm infants <32 weeks' gestation. We conducted a longitudinal study of 10 infants (mean gestational age 27 weeks, range 23.5 to 29, at birth). We isolated DNA from dried blood spots and used Real Time Quantitative PCR to measure relative leukocyte telomere length in triplicate at three time points for each participant. From birth to discharge, infants experienced an average decline in relative telomere length of 0.021 units per week (95% CI -0.040, -0.0020; p = 0.03), after adjustment for gestational age at birth. Our results suggest a measurable decline in telomere length during NICU hospitalization. We speculate that telomere length change may convey information about NICU exposures that carry short- and long-term health risks.
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132
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Samavat H, Luu HN, Beckman KB, Jin A, Wang R, Koh WP, Yuan JM. Leukocyte telomere length, cancer incidence and all-cause mortality among Chinese adults: Singapore Chinese Health Study. Int J Cancer 2021; 148:352-362. [PMID: 33459354 PMCID: PMC10693991 DOI: 10.1002/ijc.33211] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 07/02/2020] [Accepted: 07/03/2020] [Indexed: 01/16/2023]
Abstract
Telomeres play a key role in chromosomal maintenance and stability. To date, few studies have investigated the association of leukocyte telomere length with risk of cancer incidence and all-cause mortality in a large prospective cohort, particularly of the Asian population. Relative telomere lengths in genomic DNA from peripheral blood samples were quantified using a validated quantitative real-time PCR among 26 540 middle-aged or older Chinese adults. Hazard ratios (HRs) and 95% confidence intervals (CIs) of cancer and deaths by quintiles of telomere length were calculated using the Cox proportional hazards regression method with adjustment for age, sex and other potential confounders. After baseline blood collection, 4353 persons developed cancer and 7609 died. Participants with the longest decile of telomeres had a 26% (95% CI: 11%-44%) higher risk of total cancer incidence compared to the shortest decile after controlling for age, sex and other potential founders (Ptrend < .0001). In contrast, longer telomeres were associated with lower risk of all-cause mortality (HR = 0.93; 95% CI: 0.84-1.03), noncancer death (HR = 0.81; 95% CI: 0.71-0.92), specifically, death from chronic obstructive pulmonary disease and pneumonia (HR = 0.79, 95% CI: 0.70-0.89) and digestive diseases (HR = 0.60, 95% CI: 0.42-0.88). Our findings demonstrated that longer telomeres are associated with increased risk of cancer development overall and several common cancer types including breast, rectal, prostate, pancreatic cancer and lung adenocarcinoma. Our study also confirmed that longer telomeres are associated with a reduced risk of noncancer related death.
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Affiliation(s)
- Hamed Samavat
- Department of Clinical and Preventive Nutrition Sciences, School of Health Professions, Rutgers University, Newark, New Jersey
- Division of Cancer Control and Population Sciences, UPMC Hillman Cancer Center, University of Pittsburgh, Pittsburgh, Pennsylvania
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Hung N. Luu
- Division of Cancer Control and Population Sciences, UPMC Hillman Cancer Center, University of Pittsburgh, Pittsburgh, Pennsylvania
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Kenneth B. Beckman
- University of Minnesota Genomics Center, University of Minnesota, Minneapolis, Minnesota
| | - Aizhen Jin
- Health Services and Systems Research, Duke-NUS Medical School, Singapore, Singapore
| | - Renwei Wang
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Woon-Puay Koh
- Health Services and Systems Research, Duke-NUS Medical School, Singapore, Singapore
- Saw Swee Hock School of Public Health, National University of Singapore, Singapore, Singapore
| | - Jian-Min Yuan
- Division of Cancer Control and Population Sciences, UPMC Hillman Cancer Center, University of Pittsburgh, Pittsburgh, Pennsylvania
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania
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133
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Martens DS, Van Der Stukken C, Derom C, Thiery E, Bijnens EM, Nawrot TS. Newborn telomere length predicts later life telomere length: Tracking telomere length from birth to child- and adulthood. EBioMedicine 2021; 63:103164. [PMID: 33422989 PMCID: PMC7808927 DOI: 10.1016/j.ebiom.2020.103164] [Citation(s) in RCA: 60] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 11/24/2020] [Accepted: 11/25/2020] [Indexed: 12/18/2022] Open
Abstract
Background Telomere length (TL) is considered a biological marker of aging and may indicate age-related disease susceptibility. Adults and children show a fixed ranking and tracking of TL over time. However, the contribution of an individual's initial birth TL to their later life TL is unknown. We evaluated change and tracking of TL from birth to child- and adulthood. Methods Telomere length at birth was measured using qPCR in two independent prospective birth cohorts. After a median follow-up period of 4 years in ENVIRONAGE (n = 273) we assessed leukocyte telomere length (LTL) and after 23 years in EFPTS (n = 164) buccal TL was assessed. Correlations and multivariable regression models were applied to study telomere tracking and determinants of TL change from birth onwards. Findings In children, LTL at the age of 4 correlates with TL at the start of life both in cord blood (r = 0.71, P < 0.0001;) and placenta (r = 0.60, P < 0.0001) and was –11.2% and –33.1% shorter, respectively. In adulthood, buccal TL at the age of 23 correlates with placental TL (r = 0.46, P < 0.0001) and was –35.9% shorter. TL attrition was higher in individuals with longer birth TL. However, based on TL ranking, individuals do not tend to change dramatically from TL rank after 4 or 23 years of follow-up. Finally, longer maternal TL associates with lower telomere attrition in the next generation. Interpretation The high prediction of newborn TL for later life TL, and stable TL ranking from birth onwards underscores the importance of understanding the initial setting of newborn TL and its significance for later life. Funding European Research Council (ERC-StG310898) and Flemish Scientific Fund (12X9620N).
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Affiliation(s)
- Dries S Martens
- Centre for Environmental Sciences, Hasselt University, Agoralaan Gebouw D, 3590 Diepenbeek, Belgium
| | | | - Catherine Derom
- Department of Obstetrics and Gynaecology, Ghent University, 9000 Ghent, Belgium; Centre of Human Genetics, Leuven University, 3000 Leuven, Belgium
| | - Evert Thiery
- Department of Neurology, Ghent University, 9000 Ghent, Belgium
| | - Esmée M Bijnens
- Centre for Environmental Sciences, Hasselt University, Agoralaan Gebouw D, 3590 Diepenbeek, Belgium; Department of Obstetrics and Gynaecology, Ghent University, 9000 Ghent, Belgium
| | - Tim S Nawrot
- Centre for Environmental Sciences, Hasselt University, Agoralaan Gebouw D, 3590 Diepenbeek, Belgium; Department of Public Health & Primary Care, University of Leuven, 3000 Leuven, Belgium.
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134
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Pudas S, Josefsson M, Nordin Adolfsson A, Landfors M, Kauppi K, Veng-Taasti LM, Hultdin M, Adolfsson R, Degerman S. Short Leukocyte Telomeres, But Not Telomere Attrition Rates, Predict Memory Decline in the 20-Year Longitudinal Betula Study. J Gerontol A Biol Sci Med Sci 2020; 76:955-963. [PMID: 33367599 PMCID: PMC8140048 DOI: 10.1093/gerona/glaa322] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Indexed: 12/17/2022] Open
Abstract
Leukocyte telomere length (LTL) is a proposed biomarker for aging-related disorders, including cognitive decline and dementia. Long-term longitudinal studies measuring intra-individual changes in both LTL and cognitive outcomes are scarce, precluding strong conclusions about a potential aging-related relationship between LTL shortening and cognitive decline. This study investigated associations between baseline levels and longitudinal changes in LTL and memory performance across an up to 20-year follow-up in 880 dementia-free participants from a population-based study (mean baseline age: 56.8 years, range: 40–80; 52% female). Shorter baseline LTL significantly predicted subsequent memory decline (r = .34, 95% confidence interval: 0.06, 0.82), controlling for age, sex, and other relevant covariates. No significant associations were however observed between intra-individual changes in LTL and memory, neither concurrently nor with a 5-year time-lag between LTL shortening and memory decline. These results support the notion of short LTL as a predictive factor for aging-related memory decline, but suggest that LTL dynamics in adulthood and older age may be less informative of cognitive outcomes in aging. Furthermore, the results highlight the importance of long-term longitudinal evaluation of outcomes in biomarker research.
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Affiliation(s)
- Sara Pudas
- Department of Integrative Medical Biology, Umeå University, Sweden
| | - Maria Josefsson
- Center for Ageing and Demographic Research, Umeå University, Sweden
| | | | - Mattias Landfors
- Department of Medical Biosciences, Pathology, Umeå University, Sweden
| | - Karolina Kauppi
- Department of Integrative Medical Biology, Umeå University, Sweden.,Department of Medical Epidemiology and Biostatistics, Karolinska Institute, Stockholm, Sweden
| | | | - Magnus Hultdin
- Department of Medical Biosciences, Pathology, Umeå University, Sweden
| | - Rolf Adolfsson
- Department of Clinical Sciences, Umeå University, Sweden
| | - Sofie Degerman
- Department of Medical Biosciences, Pathology, Umeå University, Sweden.,Department of Clinical Microbiology, Umeå University, Sweden
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135
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Vernasco BJ, Dakin R, Majer AD, Haussmann MF, Brandt Ryder T, Moore IT. Longitudinal dynamics and behavioural correlates of telomeres in male wire‐tailed manakins. Funct Ecol 2020. [DOI: 10.1111/1365-2435.13715] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Ben J. Vernasco
- Department of Biological Sciences Virginia Tech Blacksburg VA USA
| | - Roslyn Dakin
- Migratory Bird Center Smithsonian Conservation Biology Institute Washington DC USA
| | | | | | - T. Brandt Ryder
- Migratory Bird Center Smithsonian Conservation Biology Institute Washington DC USA
| | - Ignacio T. Moore
- Department of Biological Sciences Virginia Tech Blacksburg VA USA
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136
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Gurung RL, M Y, Moh AMC, Dorajoo R, Liu S, Liu JJ, Shabbir A, So JBY, Tan CH, Cheng AKS, Lim SC. Correlation of Telomere Length in Adipose Tissue and Leukocytes and its Association with Postsurgical Weight Loss. Obesity (Silver Spring) 2020; 28:2424-2430. [PMID: 33230966 DOI: 10.1002/oby.23017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 07/15/2020] [Accepted: 08/10/2020] [Indexed: 12/26/2022]
Abstract
OBJECTIVE The aim of this study was to determine the relationship between telomere length (TL) in subcutaneous adipose tissue (SAT), visceral adipose tissues (VAT), and leukocytes, as well as to examine the associations of TL in these tissues with postsurgical weight loss in Asians with severe obesity. METHODS Presurgery TL was measured in leukocytes, SAT, and VAT of 91 patients who underwent weight loss surgery. Correlation between TL in multiple tissues was assessed using Pearson correlation. The association of presurgery TL and postsurgical weight loss at 6 or 12 months, expressed as a percentage of weight loss, was determined using linear regression in 70 patients. RESULTS Telomeres were longer in VAT compared with those in leukocytes and SAT (P < 0.001) but were highly correlated between tissues. The strongest correlation was observed between TL in VAT and leukocytes (r = 0.739, P = 6.22 × 10-17 ). Compared with individuals in the highest tertile, those in the lowest tertile of VAT TL showed greater weight loss (β = 6.23, SE = 3.10, P = 0.044) independent of age, sex, ethnicity, types of surgery, diabetes condition, preoperative BMI, and follow-up period. CONCLUSIONS Among patients with severe obesity, TL in leukocytes and adipose tissue was highly correlated. However, there was variability in the association of TL in these tissues with weight loss after surgery.
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Affiliation(s)
- Resham L Gurung
- Clinical Research Unit, Khoo Teck Puat Hospital, Yishun, Singapore
| | - Yiamunaa M
- Clinical Research Unit, Khoo Teck Puat Hospital, Yishun, Singapore
| | | | - Rajkumar Dorajoo
- Genome Institute of Singapore, Agency for Science, Technology and Research, Singapore
| | - Sylvia Liu
- Clinical Research Unit, Khoo Teck Puat Hospital, Yishun, Singapore
| | - Jian-Jun Liu
- Clinical Research Unit, Khoo Teck Puat Hospital, Yishun, Singapore
| | - Asim Shabbir
- Department of General Surgery, National University Hospital, Singapore
| | - Jimmy Bok Yan So
- Department of General Surgery, National University Hospital, Singapore
| | - Chun Hai Tan
- Department of General Surgery, Khoo Teck Puat Hospital, Yishun, Singapore
| | | | - Su Chi Lim
- Clinical Research Unit, Khoo Teck Puat Hospital, Yishun, Singapore
- Diabetes Centre, Admiralty Medical Centre, Singapore
- Saw Swee Hock School of Public Heath, Singapore
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137
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Fani L, Hilal S, Sedaghat S, Broer L, Licher S, Arp PP, van Meurs JBJ, Ikram MK, Ikram MA. Telomere Length and the Risk of Alzheimer's Disease: The Rotterdam Study. J Alzheimers Dis 2020; 73:707-714. [PMID: 31839608 PMCID: PMC7029372 DOI: 10.3233/jad-190759] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
There is a wide interest in biomarkers that capture the burden of detrimental factors as these accumulate with the passage of time, i.e., increasing age. Telomere length has received considerable attention as such a marker, because it is easily quantified and it may aid in disentangling the etiology of dementia or serve as predictive marker. We determined the association of telomere length with risk of Alzheimer’s disease and all-cause dementia in a population-based setting. Within the Rotterdam Study, we performed quantitative PCR to measure mean leukocyte telomere length in blood. We determined the association of telomere length with risk of Alzheimer’s disease until 2016, using Cox regression models. Of 1,961 participants (mean age 71.4±9.3 years, 57.1% women) with a median follow-up of 8.3 years, 237 individuals were diagnosed with Alzheimer’s disease. We found a U-shaped association between telomere length and risk of Alzheimer’s disease: compared to the middle tertile the adjusted hazard ratio was 1.59 (95% confidence interval (CI), 1.13–2.23) for the lowest tertile and 1.47 (1.03–2.10) for the highest tertile. Results were similarly U-shaped but slightly attenuated for all-cause dementia. In conclusion, shorter and longer telomere length are both associated with an increased risk of Alzheimer’s disease in the general population.
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Affiliation(s)
- Lana Fani
- Department of Epidemiology, Erasmus MC University Medical Center, Rotterdam, The Netherlands
| | - Saima Hilal
- Department of Epidemiology, Erasmus MC University Medical Center, Rotterdam, The Netherlands.,Department of Neurology, Erasmus MC, Rotterdam, The Netherlands
| | - Sanaz Sedaghat
- Department of Epidemiology, Erasmus MC University Medical Center, Rotterdam, The Netherlands.,Department of Preventive Medicine, Feinberg School of Medicine Northwestern University, Chicago, IL, USA
| | - Linda Broer
- Department of Internal Medicine, Erasmus MC, Rotterdam, The Netherlands
| | - Silvan Licher
- Department of Epidemiology, Erasmus MC University Medical Center, Rotterdam, The Netherlands
| | - Pascal P Arp
- Department of Internal Medicine, Erasmus MC, Rotterdam, The Netherlands
| | | | - M Kamran Ikram
- Department of Epidemiology, Erasmus MC University Medical Center, Rotterdam, The Netherlands.,Department of Neurology, Erasmus MC, Rotterdam, The Netherlands
| | - M Arfan Ikram
- Department of Epidemiology, Erasmus MC University Medical Center, Rotterdam, The Netherlands
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138
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Hastings WJ, Eisenberg DTA, Shalev I. Uninterruptible Power Supply Improves Precision and External Validity of Telomere Length Measurement via qPCR. EXPERIMENTAL RESULTS 2020; 1:e52. [PMID: 33718773 PMCID: PMC7954403 DOI: 10.1017/exp.2020.58] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Technical challenges associated with telomere length (TL) measurements have prompted concerns regarding their utility as a biomarker of aging. Several factors influence TL assessment via qPCR, the most common measurement method in epidemiological studies, including storage conditions and DNA extraction method. Here, we tested the impact of power supply during the qPCR assay. Momentary fluctuations in power can affect the functioning of high-performance electronics, including real-time thermocyclers. We investigated if mitigating these fluctuations by using an uninterruptible power supply (UPS) influenced TL assessment via qPCR. Samples run with a UPS had significantly lower standard deviation (p < 0.001) and coefficient of variation (p < 0.001) across technical replicates than those run without a UPS. UPS usage also improved exponential amplification efficiency at the replicate, sample, and plate levels. Together these improvements translated to increased performance across metrics of external validity including correlation with age, within-person correlation across tissues, and correlation between parents and offspring.
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Affiliation(s)
- Waylon J Hastings
- Department of Biobehavioral Health, The Pennsylvania State University, University Park PA, USA
| | - Dan T A Eisenberg
- Department of Anthropology, University of Washington, Seattle, WA, USA
| | - Idan Shalev
- Department of Biobehavioral Health, The Pennsylvania State University, University Park PA, USA
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139
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El Assar M, Angulo J, Carnicero JA, Walter S, García-García FJ, Rodríguez-Artalejo F, Rodríguez-Mañas L. Association between telomere length, frailty and death in older adults. GeroScience 2020; 43:1015-1027. [PMID: 33190211 PMCID: PMC8110679 DOI: 10.1007/s11357-020-00291-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Accepted: 10/20/2020] [Indexed: 12/27/2022] Open
Abstract
Frailty is considered a clinical marker of functional ageing. Telomere length (TL) has been proposed as a biomarker of biological age but its role in human ageing is controversial. The main aim of the study was to evaluate the longitudinal association of TL with incident frailty and mortality in two cohorts of Spanish community-dwelling older adults. TL was determined at baseline in blood samples from older adults included in Toledo Study for Healthy Aging and ENRICA cohorts while frailty was determined by frailty phenotype (FP) at baseline and at follow-up (3.5 years). Deaths occurring during follow-up were also recorded. Associations of TL with frailty and mortality were analysed by logistic regression with progressive adjustment. Data were separately analysed in the two cohorts and in all subjects by performing a meta-analysis. TL was not different between frail and non-frail subjects. Longer telomeres were not associated with lower risk of prevalent frailty. Similarly, TL at baseline failed to predict incident frailty (OR: 1.04 [0.88-1.23]) or even the development of a new FP criterion (OR: 0.97 [0.90-1.05]) at follow-up. Lack of association was also observed when analysing the development of specific FP criteria. Finally, while frailty at baseline was significantly associated with higher risk of death at follow-up (OR: 4.08 [1.97-8.43], p < 0.001), TL did not significantly change the mortality risk (OR: 1.05 [0.94-1.16]). Results show that TL does not predict incident frailty or mortality in older adults. This suggests that TL is not a reliable biomarker of functional age.
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Affiliation(s)
- Mariam El Assar
- Fundación de Investigación Biomédica del Hospital Universitario de Getafe, Getafe, Spain
- Centro de Investigación Biomédica en Red de Fragilidad y Envejecimiento Saludable (CIBERFES), Instituto de Salud Carlos III, Madrid, Spain
| | - Javier Angulo
- Centro de Investigación Biomédica en Red de Fragilidad y Envejecimiento Saludable (CIBERFES), Instituto de Salud Carlos III, Madrid, Spain
- Servicio de Histología-Investigación, Unidad de Investigación Traslacional en Cardiología (IRYCIS-UFV), Hospital Universitario Ramón y Cajal, Madrid, Spain
| | - José A Carnicero
- Fundación de Investigación Biomédica del Hospital Universitario de Getafe, Getafe, Spain
- Centro de Investigación Biomédica en Red de Fragilidad y Envejecimiento Saludable (CIBERFES), Instituto de Salud Carlos III, Madrid, Spain
| | - Stefan Walter
- Fundación de Investigación Biomédica del Hospital Universitario de Getafe, Getafe, Spain
| | | | - Fernando Rodríguez-Artalejo
- Department of Preventive Medicine and Public Health, Universidad Autónoma de Madrid/IdiPaz, CIBERESP, and IMDEA Food Institute, Madrid, Spain
| | - Leocadio Rodríguez-Mañas
- Fundación de Investigación Biomédica del Hospital Universitario de Getafe, Getafe, Spain.
- Centro de Investigación Biomédica en Red de Fragilidad y Envejecimiento Saludable (CIBERFES), Instituto de Salud Carlos III, Madrid, Spain.
- Servicio de Geriatría, Hospital Universitario de Getafe, Getafe, Spain.
- Division of Geriatric Medicine, Hospital Universitario de Getafe, Ctra de Toledo km 12,500, 28905, Getafe, Spain.
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140
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Remot F, Ronget V, Froy H, Rey B, Gaillard JM, Nussey DH, Lemaître JF. No sex differences in adult telomere length across vertebrates: a meta-analysis. ROYAL SOCIETY OPEN SCIENCE 2020; 7:200548. [PMID: 33391781 PMCID: PMC7735339 DOI: 10.1098/rsos.200548] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 09/29/2020] [Indexed: 06/12/2023]
Abstract
In many mammalian species, females live on average longer than males. In humans, women have consistently longer telomeres than men, and this has led to speculation that sex differences in telomere length (TL) could play a role in sex differences in longevity. To address the generality and drivers of patterns of sex differences in TL across vertebrates, we performed meta-analyses across 51 species. We tested two main evolutionary hypotheses proposed to explain sex differences in TL, namely the heterogametic sex disadvantage and the sexual selection hypotheses. We found no support for consistent sex differences in TL between males and females among mammal, bird, fish and reptile species. This absence of sex differences in TL across different classes of vertebrates does not support the heterogametic sex disadvantage hypothesis. Likewise, the absence of any negative effect of sexual size dimorphism on male TL suggests that sexual selection is not likely to mediate the magnitude of sex differences in TL across vertebrates. Finally, the comparative analyses we conducted did not detect any association between sex differences in TL and sex differences in longevity, which does not support the idea that sex differences in TL could explain the observed sex differences in longevity.
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Affiliation(s)
- Florentin Remot
- Université de Lyon, Université Lyon 1, CNRS, Laboratoire de Biométrie et Biologie Evolutive, UMR5558, F-69622 Villeurbanne, France
| | - Victor Ronget
- Université de Lyon, Université Lyon 1, CNRS, Laboratoire de Biométrie et Biologie Evolutive, UMR5558, F-69622 Villeurbanne, France
| | - Hannah Froy
- Institute of Evolutionary Biology, University of Edinburgh, Edinburgh EH9 3FL, UK
- Centre for Biodiversity Dynamics, Norwegian University of Science and Technology, Trondheim, Norway
| | - Benjamin Rey
- Université de Lyon, Université Lyon 1, CNRS, Laboratoire de Biométrie et Biologie Evolutive, UMR5558, F-69622 Villeurbanne, France
| | - Jean-Michel Gaillard
- Université de Lyon, Université Lyon 1, CNRS, Laboratoire de Biométrie et Biologie Evolutive, UMR5558, F-69622 Villeurbanne, France
| | - Daniel H. Nussey
- Institute of Evolutionary Biology, University of Edinburgh, Edinburgh EH9 3FL, UK
| | - Jean-François Lemaître
- Université de Lyon, Université Lyon 1, CNRS, Laboratoire de Biométrie et Biologie Evolutive, UMR5558, F-69622 Villeurbanne, France
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141
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Mathematical Connection between Short Telomere Induced Senescence Calculation and Mortality Rate Data. Int J Mol Sci 2020; 21:ijms21217959. [PMID: 33120877 PMCID: PMC7663577 DOI: 10.3390/ijms21217959] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 10/13/2020] [Accepted: 10/15/2020] [Indexed: 12/12/2022] Open
Abstract
The last 20 years have seen a surge in scientific activity and promising results in the study of aging and longevity. Many researchers have focused on telomeres, which are composed of a series of TTAGGG repeat nucleotide sequences at the ends of each chromosome. Measurements of the length of these telomere strands show that they decrease in length with increasing age, leading many authors to propose that when the length of these telomere strands decreases sufficiently, the cells enter into a state of replicative senescence, eventually leading to disease and death. These ideas are supported by evidence that short telomere length is correlated with increased mortality. In this paper, we extend this idea to make an actual calculation of the predicted mortality rate caused by short telomere length induced senescence (STLIS). We derive a simple equation for the mathematical relationship between telomere length and mortality rate. Using only three parameters based on telomere length measurement data of Canadians, we have calculated both the magnitude and the age dependence of the mortality rate for both men and women. We show that these calculated data are in good quantitative agreement with the actual number of Canadians that die. This agreement demonstrates the quantitative correlation between the mortality calculated by the STLIS model and the mortality of the major diseases of aging (e.g., cardiovascular disease, many cancers and diabetes mellitus), which dominate human mortality. This result represents significant progress in our understanding of the factors behind the cause of aging.
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McAninch D, Bianco-Miotto T, Gatford KL, Leemaqz SY, Andraweera PH, Garrett A, Plummer MD, Dekker GA, Roberts CT, Smithers LG, Grieger JA. The metabolic syndrome in pregnancy and its association with child telomere length. Diabetologia 2020; 63:2140-2149. [PMID: 32728890 DOI: 10.1007/s00125-020-05242-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 06/24/2020] [Indexed: 12/19/2022]
Abstract
AIMS/HYPOTHESIS The aim of this study was to determine whether presence of the metabolic syndrome in pregnancy associates with child telomere length or child anthropometry (weight, BMI) and BP, measured at 10 years of age. METHODS The Screening for Pregnancy Endpoints study (SCOPE) was a multicentre, international prospective cohort of nulliparous pregnant women recruited from Australia, New Zealand, Ireland and the UK (N = 5628). The current analysis is a 10 year follow-up of SCOPE pregnant women and their children, from the Australian cohort. Clinical data collected at 14-16 weeks' gestation during the SCOPE study were used to diagnose the metabolic syndrome using IDF criteria. Telomere length, a biomarker of ageing, was assessed by quantitative PCR from children's saliva collected at 10 years of age. RESULTS In women who completed follow-up (n = 255), 20% had the metabolic syndrome in pregnancy. After adjusting for a range of confounders, children of mothers who had the metabolic syndrome in pregnancy had 14% shorter telomeres than children of mothers without the metabolic syndrome in pregnancy (mean difference -0.36 [95% CI -0.74, 0.01]). Height- and weight-for-age, and BMI z scores were similar in children of mothers who did and did not have the metabolic syndrome during pregnancy. CONCLUSIONS/INTERPRETATION Children of mothers who had the metabolic syndrome in pregnancy have shorter telomeres, a biomarker of accelerated ageing. These findings warrant further studies in larger cohorts of children, as well as investigations into whether telomere length measured in cord blood associates with telomere length in childhood.
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Affiliation(s)
- Dale McAninch
- Robinson Research Institute, University of Adelaide, North Adelaide, SA, 5005, Australia
- Adelaide Medical School, University of Adelaide, Adelaide, Australia
| | - Tina Bianco-Miotto
- Robinson Research Institute, University of Adelaide, North Adelaide, SA, 5005, Australia
- Waite Research Institute, School of Agriculture, Food and Wine, University of Adelaide, Adelaide, SA, Australia
| | - Kathy L Gatford
- Robinson Research Institute, University of Adelaide, North Adelaide, SA, 5005, Australia
- Adelaide Medical School, University of Adelaide, Adelaide, Australia
| | - Shalem Y Leemaqz
- Robinson Research Institute, University of Adelaide, North Adelaide, SA, 5005, Australia
- Adelaide Medical School, University of Adelaide, Adelaide, Australia
- College of Medicine and Public Health, Flinders University, Bedford Park, SA, Australia
| | - Prabha H Andraweera
- Robinson Research Institute, University of Adelaide, North Adelaide, SA, 5005, Australia
- Adelaide Medical School, University of Adelaide, Adelaide, Australia
| | - Amy Garrett
- Robinson Research Institute, University of Adelaide, North Adelaide, SA, 5005, Australia
- Adelaide Medical School, University of Adelaide, Adelaide, Australia
| | - Michelle D Plummer
- Robinson Research Institute, University of Adelaide, North Adelaide, SA, 5005, Australia
- Adelaide Medical School, University of Adelaide, Adelaide, Australia
| | - Gus A Dekker
- Robinson Research Institute, University of Adelaide, North Adelaide, SA, 5005, Australia
- Women and Children's Division, Lyell McEwin Hospital, University of Adelaide, Adelaide, SA, Australia
| | - Claire T Roberts
- Robinson Research Institute, University of Adelaide, North Adelaide, SA, 5005, Australia
- Adelaide Medical School, University of Adelaide, Adelaide, Australia
- College of Medicine and Public Health, Flinders University, Bedford Park, SA, Australia
| | - Lisa G Smithers
- Robinson Research Institute, University of Adelaide, North Adelaide, SA, 5005, Australia
- School of Public Health, University of Adelaide, Adelaide, SA, Australia
| | - Jessica A Grieger
- Robinson Research Institute, University of Adelaide, North Adelaide, SA, 5005, Australia.
- Adelaide Medical School, University of Adelaide, Adelaide, Australia.
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143
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Guo Y, Yu H. Leukocyte Telomere Length Shortening and Alzheimer's Disease Etiology. J Alzheimers Dis 2020; 69:881-885. [PMID: 31156167 DOI: 10.3233/jad-190134] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND Several observational studies have found leukocyte telomere length (TL) to be associated with Alzheimer's diseases (AD) or dementia. However, these findings were based on small sample sizes and cannot clarify whether this relationship was causal. Genome-wide association studies (GWAS) have identified common variants associated with TL, providing a valuable resource for examining the causal effect of TL on AD using Mendelian Randomization (MR) methods. OBJECTIVE To examine if TL was causally associated with AD using GWAS summary statistics. METHODS Using a genetic risk score comprised of seven variants associated with leukocyte TL as an instrumental variable, we tested whether shorter TL was associated with a higher risk of AD by applying an MR approach to the summarized genome-wide association study data. RESULTS The genetic risk score for TL was associated with higher risk of AD [log-odds ratio (OR) = 0.003 for per TL-decreasing allele; 95% confidence interval (CI): 0.001, 0.005, p = 0.005]. Moreover, the MR analysis provided support for shorter TL to be causally associated with a higher risk of AD (log-OR = 0.04 per SD-decrease of TL; 95% CI: 0.01, 0.08, p = 0.01). CONCLUSION We suggest that TL has a causal effect on the risk of AD.
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Affiliation(s)
- Yanfang Guo
- Bao'An Hospital for Chronic Disease Prevention and Control, Shenzhen, Guangdong, China
| | - Haining Yu
- Department of Research, Shandong Cancer Hospital affiliated to Shandong University, Jinan, Shandong, China.,Shandong Academy of Medical Sciences, Jinan, Shandong, China
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144
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145
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The joint effects of frailty and telomere length for predicting mortality in older adults: the National Health and Nutrition Examination Survey 1999-2002. Aging Clin Exp Res 2020; 32:1839-1847. [PMID: 31646458 DOI: 10.1007/s40520-019-01376-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Accepted: 10/04/2019] [Indexed: 02/05/2023]
Abstract
BACKGROUND Frailty and short telomere length, which address different aspects of biological aging, are separately associated with mortality in older adults. AIMS To evaluate whether the combination of these two biomarkers would be a better predictor of mortality than either alone. METHODS This present study included participants 60 years of age or older from the National Health and Nutrition Examination Survey in the 1999-2002 phase. The frailty phenotype was identified based on the Fried definition. Telomere length relative to standard reference DNA (T/S ratio) was assessed using quantitative polymerase chain reaction (PCR). Cox proportional hazards regression models were used to estimate the individual and combined effects of frailty phenotype and telomere length on all-cause and cardiovascular mortality. RESULTS Compared with participants with neither impairment, the mortality risks increased slightly among participants with short telomere length only (hazard ratio [HR] 1.19, 95% confidence interval [CI]: 1.00-1.42) or pre-frailty only (HR 2.16, 95% CI 1.80-2.60) and gradually elevated approximately 3 folds with both short telomere length and pre-frailty (HR 2.23, 95% CI 1.81-2.74) or frailty (HR 3.57, 95% CI 2.56-4.98). Moreover, participants with both short telomere length and frailty had the highest increased all-cause mortality (HR 5.16, 95% CI 3.38-7.85) and cardiovascular mortality (HR 4.67, 95% CI 2.02-10.82). DISCUSSION AND CONCLUSIONS The combined predictor had more capability of predicting mortality, which suggested that integrating both molecular biomarkers and physiological functional parameters would be a more informative measure of biological aging.
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Maternal stress or sleep during pregnancy are not reflected on telomere length of newborns. Sci Rep 2020; 10:13986. [PMID: 32814800 PMCID: PMC7438332 DOI: 10.1038/s41598-020-71000-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Accepted: 08/06/2020] [Indexed: 11/08/2022] Open
Abstract
Telomeres play an important role in maintaining chromosomal integrity. With each cell division, telomeres are shortened and leukocyte telomere length (LTL) has therefore been considered a marker for biological age. LTL is associated with various lifetime stressors and health-related outcomes. Transgenerational effects have been implicated in newborns, with maternal stress, depression, and anxiety predicting shorter telomere length at birth, possibly reflecting the intrauterine growth environment. Previous studies, with relatively small sample sizes, have reported an effect of maternal stress, BMI, and depression during pregnancy on the LTL of newborns. Here, we attempted to replicate previous findings on prenatal stress and newborn LTL in a sample of 1405 infants using a qPCR-based method. In addition, previous research has been expanded by studying the relationship between maternal sleep quality and LTL. Maternal prenatal stress, anxiety, depression, BMI, and self-reported sleep quality were evaluated with self-reported questionnaires. Despite sufficient power to detect similar or even considerably smaller effects than those previously reported in the literature, we were unable to replicate the previous correlation between maternal stress, anxiety, depression, or sleep with LTL. We discuss several possible reasons for the discrepancies between our findings and those previously described.
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147
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Oxidative Stress, Telomere Shortening, and Apoptosis Associated to Sarcopenia and Frailty in Patients with Multimorbidity. J Clin Med 2020; 9:jcm9082669. [PMID: 32824789 PMCID: PMC7464426 DOI: 10.3390/jcm9082669] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 08/14/2020] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND The presence of oxidative stress, telomere shortening, and apoptosis in polypathological patients (PP) with sarcopenia and frailty remains unknown. METHODS Multicentric prospective observational study in order to assess oxidative stress markers (catalase, glutathione reductase (GR), total antioxidant capacity to reactive oxygen species (TAC-ROS), and superoxide dismutase (SOD)), absolute telomere length (aTL), and apoptosis (DNA fragmentation) in peripheral blood samples of a hospital-based population of PP. Associations of these biomarkers to sarcopenia, frailty, functional status, and 12-month mortality were analyzed. RESULTS Of the 444 recruited patients, 97 (21.8%), 278 (62.6%), and 80 (18%) were sarcopenic, frail, or both, respectively. Oxidative stress markers (lower TAC-ROS and higher SOD) were significantly enhanced and aTL significantly shortened in patients with sarcopenia, frailty or both syndromes. No evidence of apoptosis was detected in blood leukocytes of any of the patients. Both oxidative stress markers (GR, p = 0.04) and telomere shortening (p = 0.001) were associated to death risk and to less survival days. CONCLUSIONS Oxidative stress markers and telomere length were enhanced and shortened, respectively, in blood samples of polypathological patients with sarcopenia and/or frailty. Both were associated to decreased survival. They could be useful in the clinical practice to assess vulnerable populations with multimorbidity and of potential interest as therapeutic targets.
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148
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Seeker LA. Telomere shortening correlates with harsh weather conditions in the bat species Myotis myotis. Mol Ecol 2020; 29:2951-2953. [PMID: 32745307 DOI: 10.1111/mec.15580] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Accepted: 07/27/2020] [Indexed: 01/16/2023]
Abstract
The relationship of telomere shortening and cellular ageing in cultured cells such as fibroblasts is straightforward: telomeres shorten with an increasing number of cell divisions until they trigger replicative senescence which prevents further mitotic cycles. But studies investigating the relationship between telomere shortening and ageing in whole organisms show contrasting results: while there is a clear decline in telomere length (TL) with chronological age in some species such as humans, no such decline is observed in others. In this issue of Molecular Ecology, Foley et al. (2020) show that experiencing harsh weather conditions correlates with longitudinal telomere shortening in the bat species Myotis myotis, whereas chronological age does not (Foley et al., 2020). Further, the authors investigated whether genetics influence TL and find a low heritability (h2 = 0.01-0.06) again suggesting that environmental effects are the dominant drivers of variation in TL in this species. These are important findings as there is disagreement in the literature about the relative magnitude of genetic and environmental effects contributing to TL variation in different species. This paper investigating the impact of environmental effects makes a novel and important contribution to the literature on TL in free-living mammals.
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Affiliation(s)
- Luise A Seeker
- MRC Scottish Centre for Regenerative Medicine, University of Edinburgh, Edinburgh, UK
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Herrmann W, Herrmann M. The Importance of Telomere Shortening for Atherosclerosis and Mortality. J Cardiovasc Dev Dis 2020; 7:jcdd7030029. [PMID: 32781553 PMCID: PMC7570376 DOI: 10.3390/jcdd7030029] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 07/29/2020] [Accepted: 07/30/2020] [Indexed: 12/11/2022] Open
Abstract
Telomeres are the protective end caps of chromosomes and shorten with every cell division. Short telomeres are associated with older age and adverse lifestyle factors. Leucocyte telomere length (LTL) has been proposed as a biomarker of biological age. The shortening of LTL with age is the result of the end-replication problem, environmental, and lifestyle-related factors. Epidemiologic studies have shown that LTL predicts cardiovascular disease, all-cause mortality, and death from vascular causes. Age appears to be an important co-variate that explains a substantial fraction of this effect. Although it has been proposed that short telomeres promote atherosclerosis and impair the repair of vascular lesions, existing results are inconsistent. Oxidative stress and chronic inflammation can both accelerate telomere shortening. Multiple factors, including homocysteine (HCY), vitamin B6, and vitamin B12 modulate oxidative stress and inflammation through direct and indirect mechanisms. This review provides a compact overview of telomere physiology and the utility of LTL measurements in atherosclerosis and cardiovascular disease. In addition, it summarizes existing knowledge regarding the impact of oxidative stress, inflammation, HCY, and B-vitamins on telomere function.
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Affiliation(s)
- Wolfgang Herrmann
- Department of Clinical Chemistry, Medical School of the Saarland University, 66421 Homburg, Saar, Germany;
| | - Markus Herrmann
- Clinical Institute of Medical and Chemical Laboratory Diagnostics, Medical University of Graz, 8036 Graz, Austria
- Correspondence: or ; Tel.: +43-316-385-13145; Fax: +43-316-385-13430
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Duan W, Xu C, Liu Q, Xu J, Weng Z, Zhang X, Basnet TB, Dahal M, Gu A. Levels of a mixture of heavy metals in blood and urine and all-cause, cardiovascular disease and cancer mortality: A population-based cohort study. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 263:114630. [PMID: 33618481 DOI: 10.1016/j.envpol.2020.114630] [Citation(s) in RCA: 89] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2019] [Revised: 03/31/2020] [Accepted: 04/16/2020] [Indexed: 05/25/2023]
Abstract
People are exposed to heavy metals in many ways during the course of their daily life. However, the effect of mixtures of heavy metals on mortality in the U.S. general population is unclear. We aimed to investigate the association between heavy metal concentrations (blood [lead, cadmium and mercury] and urine [barium, cadmium, cobalt, cesium, molybdenum, lead, antimony, titanium, tungsten and uranium]) and all-cause, cardiovascular disease (CVD) and cancer mortality. Data were obtained from the National Health and Nutrition Examination Survey (NHANES) 1999-2014. Poisson regression was performed to analyze the associations between single-metal and multimetal exposure and mortality. The following variables were adjusted as covariates: demographic variables (age, education, sex and ethnicity), anthropometric variables (body mass index), lifestyle variables (family income, serum cotinine category and physical activity) and medical comorbidities (CVD and diabetes). A total of 26,056 subjects from the NHANES were included in the present study (mean follow-up, 7.4 years). The age of the participants ranged from 20 to 85 years. The blood metal mixture was associated with all-cause mortality (RR = 1.38, 95% CI 1.25, 1.51), CVD mortality (RR = 1.43, 95% CI 1.06, 1.94) and cancer mortality (RR = 1.41, 95% CI 1.12, 1.76) and cadmium had the highest weight in the weighted quantile sum (WQS) regression for all associations. The urinary metal mixture was associated with an increased risk of all-cause (RR = 1.48, 95% CI 1.30, 1.68) and cancer mortality (RR = 1.60, 95% CI 1.02, 2.52). Sex differences were found in the associations of both blood and urine metal mixtures with cancer mortality. Our study suggests a potential positive association for the concentrations of heavy metal mixtures with overall, CVD and cancer mortality based on a large sample of the U.S. general population. Nevertheless, further studies are needed to confirm these important findings.
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Affiliation(s)
- Weiwei Duan
- Department of Bioinformatics, School of Biomedical Engineering and Informatics, Nanjing Medical University, Nanjing, China
| | - Cheng Xu
- State Key Laboratory of Reproductive Medicine, School of Public Health, Nanjing Medical University, Nanjing, China; Key Laboratory of Modern Toxicology of Ministry of Education, Center for Global Health, Nanjing Medical University, Nanjing, China
| | - Qian Liu
- State Key Laboratory of Reproductive Medicine, School of Public Health, Nanjing Medical University, Nanjing, China; Key Laboratory of Modern Toxicology of Ministry of Education, Center for Global Health, Nanjing Medical University, Nanjing, China
| | - Jin Xu
- State Key Laboratory of Reproductive Medicine, School of Public Health, Nanjing Medical University, Nanjing, China; Key Laboratory of Modern Toxicology of Ministry of Education, Center for Global Health, Nanjing Medical University, Nanjing, China; Department of Maternal, Child, and Adolescent Health, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Zhenkun Weng
- State Key Laboratory of Reproductive Medicine, School of Public Health, Nanjing Medical University, Nanjing, China; Key Laboratory of Modern Toxicology of Ministry of Education, Center for Global Health, Nanjing Medical University, Nanjing, China
| | - Xin Zhang
- State Key Laboratory of Reproductive Medicine, School of Public Health, Nanjing Medical University, Nanjing, China; Key Laboratory of Modern Toxicology of Ministry of Education, Center for Global Health, Nanjing Medical University, Nanjing, China
| | - Til Bahadur Basnet
- State Key Laboratory of Reproductive Medicine, School of Public Health, Nanjing Medical University, Nanjing, China; Key Laboratory of Modern Toxicology of Ministry of Education, Center for Global Health, Nanjing Medical University, Nanjing, China
| | - Maginsh Dahal
- State Key Laboratory of Reproductive Medicine, School of Public Health, Nanjing Medical University, Nanjing, China; Key Laboratory of Modern Toxicology of Ministry of Education, Center for Global Health, Nanjing Medical University, Nanjing, China
| | - Aihua Gu
- State Key Laboratory of Reproductive Medicine, School of Public Health, Nanjing Medical University, Nanjing, China; Key Laboratory of Modern Toxicology of Ministry of Education, Center for Global Health, Nanjing Medical University, Nanjing, China.
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