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Karimian K, Groot A, Huso V, Kahidi R, Tan KT, Sholes S, Keener R, McDyer JF, Alder JK, Li H, Rechtsteiner A, Greider CW. Human telomere length is chromosome end-specific and conserved across individuals. Science 2024; 384:533-539. [PMID: 38603523 DOI: 10.1126/science.ado0431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2024] [Accepted: 03/30/2024] [Indexed: 04/13/2024]
Abstract
Short telomeres cause age-related disease, and long telomeres contribute to cancer; however, the mechanisms regulating telomere length are unclear. We developed a nanopore-based method, which we call Telomere Profiling, to determine telomere length at nearly single-nucleotide resolution. Mapping telomere reads to chromosome ends showed chromosome end-specific length distributions that could differ by more than six kilobases. Examination of telomere lengths in 147 individuals revealed that certain chromosome ends were consistently longer or shorter. The same rank order was found in newborn cord blood, suggesting that telomere length is determined at birth and that chromosome end-specific telomere length differences are maintained as telomeres shorten with age. Telomere Profiling makes precision investigation of telomere length widely accessible for laboratory, clinical, and drug discovery efforts and will allow deeper insights into telomere biology.
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Affiliation(s)
- Kayarash Karimian
- Department of Molecular Biology and Genetics, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Biochemistry, Cellular and Molecular Biology Graduate Program, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Aljona Groot
- Department of Molecular Cell and Developmental Biology, University of California, Santa Cruz, CA, USA
| | - Vienna Huso
- Department of Molecular Biology and Genetics, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Biochemistry, Cellular and Molecular Biology Graduate Program, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Ramin Kahidi
- Health Sciences Program, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Kar-Tong Tan
- Department of Genetics, Harvard Medical School, Boston, MA, USA
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
- Cancer Program, The Broad Institute, Cambridge, MA, USA
| | - Samantha Sholes
- Department of Molecular Biology and Genetics, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Biochemistry, Cellular and Molecular Biology Graduate Program, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Rebecca Keener
- Biochemistry, Cellular and Molecular Biology Graduate Program, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, USA
| | - John F McDyer
- Pulmonary, Allergy, Critical Care, and Sleep Medicine Division, Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Jonathan K Alder
- Pulmonary, Allergy, Critical Care, and Sleep Medicine Division, Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Heng Li
- Department of Data Sciences, Dana-Farber Cancer Institute, Boston, MA, USA
- Department of Biomedical Informatics, Harvard Medical School, Boston, MA, USA
| | - Andreas Rechtsteiner
- Department of Molecular Cell and Developmental Biology, University of California, Santa Cruz, CA, USA
| | - Carol W Greider
- Department of Molecular Biology and Genetics, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Department of Molecular Cell and Developmental Biology, University of California, Santa Cruz, CA, USA
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Christian LM, Wilson SJ, Madison AA, Prakash RS, Burd CE, Rosko AE, Kiecolt-Glaser JK. Understanding the health effects of caregiving stress: New directions in molecular aging. Ageing Res Rev 2023; 92:102096. [PMID: 37898293 PMCID: PMC10824392 DOI: 10.1016/j.arr.2023.102096] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Revised: 10/11/2023] [Accepted: 10/23/2023] [Indexed: 10/30/2023]
Abstract
Dementia caregiving has been linked to multiple health risks, including infectious illness, depression, anxiety, immune dysregulation, weakened vaccine responses, slow wound healing, hypertension, cardiovascular disease, metabolic syndrome, diabetes, frailty, cognitive decline, and reduced structural and functional integrity of the brain. The sustained overproduction of proinflammatory cytokines is a key pathway behind many of these risks. However, contrasting findings suggest that some forms of caregiving may have beneficial effects, such as maintaining caregivers' health and providing a sense of meaning and purpose which, in turn, may contribute to lower rates of functional decline and mortality. The current review synthesizes these disparate literatures, identifies methodological sources of discrepancy, and integrates caregiver research with work on aging biomarkers to propose a research agenda that traces the mechanistic pathways of caregivers' health trajectories with a focus on the unique stressors facing spousal caregivers as compared to other informal caregivers. Combined with a focus on psychosocial moderators and mechanisms, studies using state-of-the-art molecular aging biomarkers such as telomere length, p16INK4a, and epigenetic age could help to reconcile mixed literature on caregiving's sequelae by determining whether and under what conditions caregiving-related experiences contribute to faster aging, in part through inflammatory biology. The biomarkers predict morbidity and mortality, and each contributes non-redundant information about age-related molecular changes -together painting a more complete picture of biological aging. Indeed, assessing changes in these biopsychosocial mechanisms over time would help to clarify the dynamic relationships between caregiving experiences, psychological states, immune function, and aging.
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Affiliation(s)
- Lisa M Christian
- Department of Psychiatry & Behavioral Health, The Ohio State University Wexner Medical Center, Columbus, OH, USA; The Institute for Behavioral Medicine Research, The Ohio State University Wexner Medical Center, Columbus, OH, USA.
| | - Stephanie J Wilson
- Department of Psychology, Southern Methodist University, University Park, TX, USA
| | - Annelise A Madison
- The Institute for Behavioral Medicine Research, The Ohio State University Wexner Medical Center, Columbus, OH, USA; Department of Psychology, The Ohio State University, Columbus, OH, USA
| | - Ruchika S Prakash
- Department of Psychology, The Ohio State University, Columbus, OH, USA; Center for Cognitive and Behavioral Brain Imaging, Ohio State University, Columbus, OH, USA
| | - Christin E Burd
- Departments of Molecular Genetics, Cancer Biology and Genetics, The Ohio State University, Columbus, OH, USA
| | - Ashley E Rosko
- Division of Hematology, The Ohio State University, Columbus, OH, USA
| | - Janice K Kiecolt-Glaser
- Department of Psychiatry & Behavioral Health, The Ohio State University Wexner Medical Center, Columbus, OH, USA; The Institute for Behavioral Medicine Research, The Ohio State University Wexner Medical Center, Columbus, OH, USA
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Mayer SE, Guan J, Lin J, Hamlat E, Parker JE, Brownell K, Price C, Mujahid M, Tomiyama AJ, Slavich GM, Laraia BA, Epel ES. Intergenerational effects of maternal lifetime stressor exposure on offspring telomere length in Black and White women. Psychol Med 2023; 53:6171-6182. [PMID: 36457292 PMCID: PMC10235210 DOI: 10.1017/s0033291722003397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
BACKGROUND Although maternal stressor exposure has been associated with shorter telomere length (TL) in offspring, this literature is based largely on White samples. Furthermore, timing of maternal stressors has rarely been examined. Here, we examined how maternal stressors occurring during adolescence, pregnancy, and across the lifespan related to child TL in Black and White mothers. METHOD Mothers (112 Black; 110 White; Mage = 39) and their youngest offspring (n = 222; Mage = 8) were part of a larger prospective cohort study, wherein mothers reported their stressors during adolescence (assessed twice during adolescence for the past year), pregnancy (assessed in midlife for most recent pregnancy), and across their lifespan (assessed in midlife). Mother and child provided saliva for TL measurement. Multiple linear regression models examined the interaction of maternal stressor exposure and race in relation to child TL, controlling for maternal TL and child gender and age. Race-stratified analyses were also conducted. RESULTS Neither maternal adolescence nor lifespan stressors interacted with race in relation to child TL. In contrast, greater maternal pregnancy stressors were associated with shorter child TL, but this effect was present for children of White but not Black mothers. Moreover, this effect was significant for financial but not social pregnancy stressors. Race-stratified models revealed that greater financial pregnancy stressors predicted shorter telomeres in offspring of White, but not Black mothers. CONCLUSIONS Race and maternal stressors interact and are related to biological aging across generations, but these effects are specific to certain races, stressors, and exposure time periods.
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Affiliation(s)
- Stefanie E. Mayer
- Department of Psychiatry and Behavioral Sciences, University of California San Francisco, San Francisco, CA 94143-0984, USA
| | - Joanna Guan
- Department of Psychiatry and Behavioral Sciences, University of California San Francisco, San Francisco, CA 94143-0984, USA
| | - Jue Lin
- Department of Biochemistry and Biophysics, University of California San Francisco, San Francisco, CA 94143, USA
| | - Elissa Hamlat
- Department of Psychiatry and Behavioral Sciences, University of California San Francisco, San Francisco, CA 94143-0984, USA
| | - Jordan E. Parker
- Department of Psychology, University of California, Los Angeles, CA 90095, USA
| | - Kristy Brownell
- School of Public Health, University of California Berkeley, Berkeley, CA 94720, USA
| | - Candice Price
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California Davis, Davis, CA 95616, USA
| | - Mahasin Mujahid
- School of Public Health, University of California Berkeley, Berkeley, CA 94720, USA
| | - A. Janet Tomiyama
- Department of Psychology, University of California, Los Angeles, CA 90095, USA
| | - George M. Slavich
- Department of Psychiatry and Biobehavioral Sciences, University of California, Los Angeles, CA 90095, USA
| | - Barbara A. Laraia
- School of Public Health, University of California Berkeley, Berkeley, CA 94720, USA
| | - Elissa S. Epel
- Department of Psychiatry and Behavioral Sciences, University of California San Francisco, San Francisco, CA 94143-0984, USA
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Sharma P, Yadav RK, Khadgawat R, Dada R. A 12-Week Yoga-Based Lifestyle Intervention Might Positively Modify Cellular Aging in Indian Obese Individuals: A Randomized-Controlled Trial. JOURNAL OF INTEGRATIVE AND COMPLEMENTARY MEDICINE 2022; 28:168-178. [PMID: 35167359 DOI: 10.1089/jicm.2021.0215] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Background: Telomeres and telomerase are considered cardinal biomarkers of cellular aging. Shorter telomeres and low telomerase activity have been associated with obesity and accelerated aging. Objective: To compare the effects of a yoga-based lifestyle intervention (YBLI) with the standard of care (SOC) on cellular aging by estimating telomere length (TL) and telomerase activity in obesity. Design and setting: A parallel, two-arm, randomized-controlled trial was conducted at the Integral Health Clinic, Department of Physiology, All India Institute of Medical Sciences, New Delhi, from March 2017 to October 2019. Participants: Obese (n = 72), body mass index (BMI), 25-35 kg/m2, aged 20-45 years, male (21), and female (51). Intervention: Seventy-two obese participants were randomized to receive either a 12-week SOC (n = 36) or YBLI (n = 36). SOC included management of obesity as per Indian guidelines including a hypocaloric individualized diet and physical activity. The pretested YBLI included asana (physical postures), pranayama (breathing exercises), and meditation. Methods: Blood samples were collected from both the groups at baseline, 2, 4, and 12 weeks. DNA was extracted from peripheral blood mononuclear cells. TL was measured by quantitative PCR, and serum telomerase levels by immunoassay. Outcome measures: Primary outcome measures were the changes in the TL and telomerase levels between the two groups at week 12. Secondary outcome measures were the changes in TL and telomerase, and anthropometric parameters (body weight, BMI, waist-to-hip ratio) at 2, 4, and 12 weeks of intervention in both SOC and YBLI groups. Results: There were no significant changes in TL and telomerase levels between the groups at week 12. The TL was significantly greater in the YBLI group versus the SOC group (p < 0.0001) at 2 weeks. The anthropometric and physiological parameters were influenced positively by both SOC and YBLI. Conclusion: The study did not meet the primary objective, although the results are suggestive of a positive impact of YBLI on aging in obesity as noted within the YBLI group. However, the results should be interpreted carefully, and in the light of other published data. Larger studies to better understand the possible positive benefits of YBLI on cellular aging are recommended. Clinical Trail Registration No. CTRI/2016/08/007136.
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Affiliation(s)
- Piyush Sharma
- Integral Health and Wellness Clinic, Department of Physiology, All India Institute of Medical Sciences, New Delhi, India
| | - Raj Kumar Yadav
- Integral Health and Wellness Clinic, Department of Physiology, All India Institute of Medical Sciences, New Delhi, India
| | - Rajesh Khadgawat
- Department of Endocrinology, Metabolism and Diabetes, All India Institute of Medical Sciences, New Delhi, India
| | - Rima Dada
- Department of Anatomy, All India Institute of Medical Sciences, New Delhi, India
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Cheng F, Luk AO, Wu H, Lim CKP, Carroll L, Tam CHT, Fan B, Yang A, Lau ESH, Ng ACW, Lee HM, Chow E, Kong APS, Keech AC, Joglekar MV, So WY, Jenkins AJ, Chan JCN, Hardikar AA, Ma RCW. Shortened relative leukocyte telomere length is associated with all-cause mortality in type 2 diabetes- analysis from the Hong Kong Diabetes Register. Diabetes Res Clin Pract 2021; 173:108649. [PMID: 33422583 DOI: 10.1016/j.diabres.2021.108649] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 12/16/2020] [Accepted: 01/04/2021] [Indexed: 12/23/2022]
Abstract
AIMS Few studies have investigated the relationship between rLTL and mortality in patients with type 2 diabetes in a large prospective study, particularly in the Asian population. This study investigates the relationship between rLTL and the risk of death in Chinese patients with type 2 diabetes. METHODS Consecutive Chinese patients with type 2 diabetes (N = 5349) from the Hong Kong Diabetes Register with stored baseline DNA and available follow-up data were studied. rLTL was measured using a quantitative polymerase chain reaction. Mortality and clinical outcomes were obtained based on ICD-9 codes. RESULTS The mean (SD) age of the subjects was 57.5 (13.3) years and mean (SD) follow-up duration was 13.4 (5.5) years. Baseline rLTL was significantly shorter in the 1925 subjects who subsequently died compared with the remaining subjects (4.3 ± 1.2 vs. 4.7 ± 1.2, P < 0.001). Shorter rLTL was associated with a higher risk of mortality (HR: 1.19 (1.14-1.23), P < 0.001), which remained significant after adjusting for traditional risk factors. CONCLUSIONS Shorter rLTL was significantly associated with an increased risk of all-cause and CVD mortality in patients with type 2 diabetes, independent of established risk factors. Telomere length may be a useful biomarker for mortality risk in patients with type 2 diabetes.
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Affiliation(s)
- Feifei Cheng
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong Special Administrative Region
| | - Andrea O Luk
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong Special Administrative Region; Hong Kong Institute of Diabetes and Obesity, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong Special Administrative Region; Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong Special Administrative Region
| | - Hongjiang Wu
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong Special Administrative Region
| | - Cadmon K P Lim
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong Special Administrative Region; Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong Special Administrative Region
| | - Luke Carroll
- NHMRC Clinical Trial Centre, Faculty of Medicine and Health, University of Sydney, Australia
| | - Claudia H T Tam
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong Special Administrative Region; Hong Kong Institute of Diabetes and Obesity, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong Special Administrative Region; Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong Special Administrative Region
| | - Baoqi Fan
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong Special Administrative Region; Hong Kong Institute of Diabetes and Obesity, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong Special Administrative Region
| | - Aimin Yang
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong Special Administrative Region; Hong Kong Institute of Diabetes and Obesity, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong Special Administrative Region
| | - Eric S H Lau
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong Special Administrative Region
| | - Alex C W Ng
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong Special Administrative Region
| | - Heung Man Lee
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong Special Administrative Region; Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong Special Administrative Region
| | - Elaine Chow
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong Special Administrative Region; Hong Kong Institute of Diabetes and Obesity, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong Special Administrative Region
| | - Alice P S Kong
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong Special Administrative Region; Hong Kong Institute of Diabetes and Obesity, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong Special Administrative Region; Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong Special Administrative Region
| | - Anthony C Keech
- NHMRC Clinical Trial Centre, Faculty of Medicine and Health, University of Sydney, Australia
| | - Mugdha V Joglekar
- NHMRC Clinical Trial Centre, Faculty of Medicine and Health, University of Sydney, Australia; Diabetes and Islet Biology Group, School of Medicine, Western Sydney University, Australia
| | - Wing Yee So
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong Special Administrative Region; Hong Kong Institute of Diabetes and Obesity, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong Special Administrative Region
| | - Alicia J Jenkins
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong Special Administrative Region; NHMRC Clinical Trial Centre, Faculty of Medicine and Health, University of Sydney, Australia
| | - Juliana C N Chan
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong Special Administrative Region; Hong Kong Institute of Diabetes and Obesity, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong Special Administrative Region; Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong Special Administrative Region; The Chinese University of Hong Kong-Shanghai Jiao Tong University Joint Research Centre in Diabetes Genomics and Precision Medicine, Prince of Wales Hospital, Hong Kong Special Administrative Region
| | - Anandwardhan A Hardikar
- NHMRC Clinical Trial Centre, Faculty of Medicine and Health, University of Sydney, Australia; Diabetes and Islet Biology Group, School of Medicine, Western Sydney University, Australia
| | - Ronald C W Ma
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong Special Administrative Region; Hong Kong Institute of Diabetes and Obesity, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong Special Administrative Region; Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong Special Administrative Region; NHMRC Clinical Trial Centre, Faculty of Medicine and Health, University of Sydney, Australia; The Chinese University of Hong Kong-Shanghai Jiao Tong University Joint Research Centre in Diabetes Genomics and Precision Medicine, Prince of Wales Hospital, Hong Kong Special Administrative Region.
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Dynamics of leukocyte telomere length in adults aged 50 and older: a longitudinal population-based cohort study. GeroScience 2021; 43:645-654. [PMID: 33469834 PMCID: PMC8110630 DOI: 10.1007/s11357-020-00320-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Accepted: 12/21/2020] [Indexed: 10/22/2022] Open
Abstract
It is well established from previous cross-sectional studies that telomeres shorten with age. However, due to a considerable inter-individual variation in telomere length (TL), its relationship with biological aging is difficult to unpick. Longitudinal repeated assessments of TL changes within individuals should augment our understanding of TL dynamics in aging. This study disentangles within- and inter-individual effects of age on leukocyte telomere length (LTL) dynamics in a large population-based cohort of older adults. A total of 4053 subjects aged 50 and older from the WHO Study on global AGEing and adult health (SAGE) in Shanghai were studied. Relative LTL (T/S ratio) was measured at baseline (2009-2010) and follow-up (2017-2018) by quantitative real-time polymerase chain reaction. We used linear random slope models to analyze LTL dynamics in relation to age and sex and within-subject centering method to distinguish within- versus between-subject effects. We observed LTL shortening in 66.32%, maintenance in 11.23%, and elongation in 22.45% of the study participants. LTL declined significantly with age both cross-sectionally and longitudinally. More importantly, the longitudinal decline in LTL was much greater than the cross-sectional decline (- 0.017 (p < 0.001) versus - 0.002 (p < 0.001) per year). Furthermore, women had a lower within-subject LTL shortening rate than men (- 0.014 versus - 0.020 per year, p < 0.001). The within-individual longitudinal decline in LTL was much greater than the inter-individual cross-sectional decline, indicating that chronological age might impose a greater impact on LTL shortening than other influencing factors combined. Moreover, women showed a lower within-individual LTL shortening rate than men.
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Colicino E, Cowell W, Bozack A, Foppa Pedretti N, Joshi A, Niedzwiecki MM, Bollati V, Berin C, Wright RO, Wright RJ. Association between prenatal immune phenotyping and cord blood leukocyte telomere length in the PRISM pregnancy cohort. ENVIRONMENTAL RESEARCH 2020; 191:110113. [PMID: 32841635 PMCID: PMC7883408 DOI: 10.1016/j.envres.2020.110113] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 07/28/2020] [Accepted: 08/16/2020] [Indexed: 05/07/2023]
Abstract
BACKGROUND Environmental exposures including air pollutants, toxic metals, and psychosocial stress have been associated with shorter telomere length (TL) in newborns. These exposures have in turn been linked to an enhanced inflammatory immune response. Increased inflammation during pregnancy may be a central biological pathway linking environmental factors with reduced TL at birth. Approaches that more comprehensively characterize the prenatal inflammatory milieu rather than targeting specific individual cytokines in relation to newborn TL may better elucidate inflammatory mechanisms. METHODS Analyses included 129 mother-child dyads enrolled in the PRogramming of Intergenerational Stress Mechanisms (PRISM) pregnancy cohort. We measured 92 inflammation related proteins during pregnancy in maternal serum using the Olink protein array and quantified cord blood relative leukocyte TL (rLTL) via qPCR. We leveraged a tree-based machine learning algorithm to select the most important inflammatory related proteins jointly associated with rLTL. We then evaluated the combined association between the selected proteins with rLTL using Bayesian Weighted Quantile Sum (BWQS) Regression. Analyses were adjusted for gestational week of serum collection, maternal race/ethnicity, age, and education, and fetal sex. We evaluated major biological function of the identified proteins by using the UniProtKB, a centralized repository of curated functional information. RESULTS Three proteins were negatively and linearly associated with rLTL (CASP8 β: -0.22 p = 0.008, BNGF β: -0.43 p = 0.033, TRANCE β: 0.38 p = 0.004). Results from BWQS regression showed a significant overall decrease in rLTL (β: -0.26 95%CrI: -0.43, -0.07) per quartile increase of the mixture, with CASP8 contributing the greatest weight (CASP8 50%; BNGF 27%, and TRANCE 23%). The identified proteins were involved in the regulation of apoptotic processes and cell proliferation. CONCLUSIONS This proteomics approach identifies novel maternal prenatal inflammatory protein biomarkers associated with shortened rLTL in newborns.
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Affiliation(s)
- E Colicino
- Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
| | - W Cowell
- Department of Pediatrics, Kravis Children's Hospital, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - A Bozack
- Department of Pediatrics, Kravis Children's Hospital, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - N Foppa Pedretti
- Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - A Joshi
- Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - M M Niedzwiecki
- Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | | | - C Berin
- Department of Pediatrics, Kravis Children's Hospital, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - R O Wright
- Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Department of Pediatrics, Kravis Children's Hospital, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - R J Wright
- Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Department of Pediatrics, Kravis Children's Hospital, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Institute for Exposomic Research, Icahn School of Medicine at Mount Sinai, New York, NY, USA
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8
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Utyro O, Perła-Kaján J, Kubalska J, Graban A, Jakubowski H. Telomere length and mtDNA copy number in human cystathionine β-synthase deficiency. Free Radic Biol Med 2020; 160:219-226. [PMID: 32768567 DOI: 10.1016/j.freeradbiomed.2020.07.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 07/24/2020] [Accepted: 07/27/2020] [Indexed: 10/23/2022]
Abstract
Telomere shortening and mitochondrial DNA (mtDNA) copy number are associated with human disease and a reduced life span. Cystathionine β-synthase (CBS) is a housekeeping enzyme that catalyzes the first step in metabolic conversion of homocysteine (Hcy) to cysteine. Mutations in the CBS gene cause CBS deficiency, a rare recessive metabolic disease, manifested by severe hyperhomocysteinemia (HHcy) and thromboembolism, which ultimately reduces the life span. However, it was not known whether telomere shortening or mtDNA is involved in the pathology of human CBS deficiency. We quantified leukocyte telomere length (TL), mtDNA copy number, and plasma Hcy levels in CBS-/- patients (n = 23) and in sex- and age-matched unaffected CBS+/+ control individuals (n = 28) 0.08-57 years old. We found that TL was significantly increased in severely HHcy CBS-/- female patients but unaffected in severely HHcy CBS-/- male patients, relative to the corresponding CBS+/+ controls who had normal plasma Hcy levels. In multiple regression analysis TL was associated with CBS genotype in women but not in men. MtDNA copy number was not significantly affected by the CBS-/- genotype. Taken together, these findings identify the CBS gene as a new locus in human DNA that affects TL in women and illustrate a concept that a housekeeping metabolic gene can be involved in telomere biology. Our findings suggest that neither telomere shortening nor reduced mtDNA copy number contribute to the reduced life span in CBS-/- patients.
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Affiliation(s)
- Olga Utyro
- Department of Biochemistry and Biotechnology, Poznań University of Life Sciences, 60-632, Poznań, Poland; Institute of Bioorganic Chemistry, Polish Academy of Sciences, 61-704, Poznań, Poland
| | - Joanna Perła-Kaján
- Department of Biochemistry and Biotechnology, Poznań University of Life Sciences, 60-632, Poznań, Poland
| | - Jolanta Kubalska
- Department of Genetics, Institute of Psychiatry and Neurology, 02-957, Warsaw, Poland
| | - Ałła Graban
- Department of Genetics, Institute of Psychiatry and Neurology, 02-957, Warsaw, Poland
| | - Hieronim Jakubowski
- Department of Biochemistry and Biotechnology, Poznań University of Life Sciences, 60-632, Poznań, Poland; Department of Microbiology, Biochemistry and Molecular Genetics, Rutgers University-New Jersey Medical School, International Center for Public Health, Newark, NJ, 07103, USA.
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9
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Biohorology and biomarkers of aging: Current state-of-the-art, challenges and opportunities. Ageing Res Rev 2020; 60:101050. [PMID: 32272169 DOI: 10.1016/j.arr.2020.101050] [Citation(s) in RCA: 89] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2019] [Revised: 02/06/2020] [Accepted: 03/22/2020] [Indexed: 02/08/2023]
Abstract
The aging process results in multiple traceable footprints, which can be quantified and used to estimate an organism's age. Examples of such aging biomarkers include epigenetic changes, telomere attrition, and alterations in gene expression and metabolite concentrations. More than a dozen aging clocks use molecular features to predict an organism's age, each of them utilizing different data types and training procedures. Here, we offer a detailed comparison of existing mouse and human aging clocks, discuss their technological limitations and the underlying machine learning algorithms. We also discuss promising future directions of research in biohorology - the science of measuring the passage of time in living systems. Overall, we expect deep learning, deep neural networks and generative approaches to be the next power tools in this timely and actively developing field.
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Study of telomere length in men who carry a fragile X premutation or full mutation allele. Hum Genet 2020; 139:1531-1539. [PMID: 32533363 DOI: 10.1007/s00439-020-02194-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Accepted: 06/03/2020] [Indexed: 02/07/2023]
Abstract
The fragile X premutation is defined by the expansion of the CGG trinucleotide repeat at the 5' UTR of the FMR1 gene to between 55 and 200 repeats, while repeat tracks longer than 200 are defined as full mutations. Men carrying a premutation are at increased risk for fragile X-associated tremor/ataxia syndrome (FXTAS); those with > 200 repeats have fragile X syndrome, a common genetic form of intellectual disabilities. In our study, we tested the hypothesis that men carrying a fragile X premutation or full mutation are "biologically older", as suggested by the associated age-related disorder in the presence of the fragile X premutation or the altered cellular pathology that affects both the fragile X premutation and full mutation carriers. Thus, we predicted that both groups would have shorter telomeres than men carrying the normal size repeat allele. Using linear regression models, we found that, on average, premutation carriers had shorter telomeres compared with non-carriers (n = 69 vs n = 36; p = 0.02) and that there was no difference in telomere length between full mutation carriers and non-carriers (n = 37 vs n = 29; p > 0.10). Among premutation carriers only, we also asked whether telomere length was shorter among men with vs without symptoms of FXTAS (n = 28 vs n = 38 and n = 27 vs n = 41, depending on criteria) and found no evidence for a difference (p > 0.10). Previous studies have shown that the premutation is transcribed whereas the full mutation is not, and the expanded repeat track in FMR1 transcript is thought to lead to the risk for premutation-associated disorders. Thus, our data suggest that the observed premutation-only telomere shortening may be a consequence of the toxic effect of the premutation transcript and suggest that premutation carriers are "biologically older" than men carrying the normal size allele in the same age group.
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Maternal pro-inflammatory state during pregnancy and newborn leukocyte telomere length: A prospective investigation. Brain Behav Immun 2019; 80:419-426. [PMID: 30974172 PMCID: PMC7954441 DOI: 10.1016/j.bbi.2019.04.021] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 03/14/2019] [Accepted: 04/06/2019] [Indexed: 12/16/2022] Open
Abstract
INTRODUCTION Telomere biology plays a fundamental role in maintaining the integrity of the genome and cell, and shortened telomeres have been linked to several age-related diseases. The initial (newborn) telomere length (TL) represents a critically important feature of the telomere biology system. Exposure to a variety of adverse prenatal conditions such as maternal stress, suboptimal diet, obesity, and obstetric complications, is associated with shorter offspring TL at birth and in adult life. Many, if not all, of these exposures are believed to have an inflammatory component. In this context, stress-related immunological processes during pregnancy may constitute a potential additional biological pathway because they can affect telomere length and telomerase activity via transcriptions factors such as cyclic adenosine monophosphate-dependent transcription factor (ATF7) and nuclear factor-kappa B (NF-κB). Thus, in the present study we examined the hypothesis that maternal pro-inflammatory state across pregnancy, operationalized as the balance between tumor necrosis factor (TNF)-α, a major pro-inflammatory cytokine, and interleukin-10 (IL-10), the major anti-inflammatory cytokine, is associated with newborn leukocyte telomere length (LTL) at birth. METHODS AND MATERIALS Participants were healthy women (N = 112) recruited in early pregnancy. Concentrations of TNF- α and IL-10 were quantified in early, mid and late pregnancy from maternal blood samples. Telomere length was assessed in newborn blood samples soon after birth. RESULTS After adjusting for maternal age, maternal pre-pregnancy BMI, birth weight percentile, and infant sex, a higher mean TNF-α/IL-10 ratio across pregnancy was significantly associated with shorter newborn TL (β = -.205, p = .030). Newborn TL was, on average, 10% shorter in offspring of women in the upper compared to lower quartile of the TNF-α/IL-10 ratio during pregnancy. DISCUSSION These findings provide new evidence in humans for a potential "programming" mechanism linking maternal systemic pro-inflammatory processes during pregnancy with the initial (newborn) setting of her offspring's telomere system.
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Abstract
Telomeres are specialised structures at the end of linear chromosomes. They consist of tandem repeats of the hexanucleotide sequence TTAGGG, as well as a protein complex called shelterin. Together, they form a protective loop structure against chromosome fusion and degradation. Shortening or damage to telomeres and opening of the loop induce an uncapped state that triggers a DNA damage response resulting in senescence or apoptosis.Average telomere length, usually measured in human blood lymphocytes, was thought to be a biomarker for ageing, survival and mortality. However, it becomes obvious that regulation of telomere length is very complex and involves multiple processes. For example, the "end replication problem" during DNA replication as well as oxidative stress are responsible for the shortening of telomeres. In contrast, telomerase activity can potentially counteract telomere shortening when it is able to access and interact with telomeres. However, while highly active during development and in cancer cells, the enzyme is down-regulated in most human somatic cells with a few exceptions such as human lymphocytes. In addition, telomeres can be transcribed, and the transcription products called TERRA are involved in telomere length regulation.Thus, telomere length and their integrity are regulated at many different levels, and we only start to understand this process under conditions of increased oxidative stress, inflammation and during diseases as well as the ageing process.This chapter aims to describe our current state of knowledge on telomeres and telomerase and their regulation in order to better understand their role for the ageing process.
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Correlation of rs1122608 SNP with acute myocardial infarction susceptibility and clinical characteristics in a Chinese Han population: A case-control study. Anatol J Cardiol 2019; 19:249-258. [PMID: 29615549 PMCID: PMC5998852 DOI: 10.14744/anatoljcardiol.2018.35002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Objective: The correlation of the BRG1 rs1122608 single nucleotide polymorphism (SNP) with acute myocardial infarction (AMI) has been reported in American and European populations. However, whether rs1122608 acts as a protective factor or a risk factor for AMI is controversial. In this study, we aimed to detect the associations between rs1122608 and the clinical characteristics of AMI as well as susceptibility, gene–environment interactions, and risk factors for AMI in a Chinese Han population. Methods: In this study, 300 AMI patients and 300 healthy controls of Chinese Han ancestry were enrolled. PCR-RFLP was used to genotype rs1122608 SNPs. Genotypic and allelic frequencies of rs1122608 were compared between the AMI and control groups and among four AMI subgroups, which were subdivided by typical symptom, diagnosis time (DT), infarction location andserious complication. Results: Significant differences were detected between the AMI patients and the controls in both the genotypic and allelic frequencies of rs1122608 (p<0.001 for each). There were also interactions between the subjects with a minor T allele and smoking or alcohol consumption (p<0.001 for each). Conclusion: In the Chinese Han study population, the mutant GT and TT genotypes and minor T allele of rs1122608 were positively correlated with the risk of AMI. For the first time, we discovered that the GT genotype of the rs1122608 SNP is significantly correlated with diagnosis time of AMI. In addition, the interactions between the minor T allele of rs1122608 and smoking or alcohol use and between the rs1122608 CC genotype and alcohol use appear to increase the risk of AMI.
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Rentscher KE, Carroll JE, Repetti RL, Cole SW, Reynolds BM, Robles TF. Chronic stress exposure and daily stress appraisals relate to biological aging marker p16 INK4a. Psychoneuroendocrinology 2019; 102:139-148. [PMID: 30557761 PMCID: PMC6420375 DOI: 10.1016/j.psyneuen.2018.12.006] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 12/04/2018] [Accepted: 12/06/2018] [Indexed: 01/19/2023]
Abstract
Previous research has linked exposure to adverse social conditions with DNA damage and accelerated telomere shortening, raising the possibility that chronic stress may impact biological aging pathways, ultimately increasing risk for age-related diseases. Less clear, however, is whether these stress-related effects extend to additional hallmarks of biological aging, including cellular senescence, a stable state of cell cycle arrest. The present study aimed to investigate associations between psychosocial stress and two markers of cellular aging-leukocyte telomere length (LTL) and cellular senescence signal p16INK4a. Seventy-three adults (Mage = 43.0, SD = 7.2; 55% female) with children between 8-13 years of age completed interview-based and questionnaire measures of their exposures to and experiences of stress, as well as daily reports of stress appraisals over an 8-week diary period. Blood samples were used to assess markers of cellular aging: LTL and gene expression of senescent cell signal p16INK4a (CDKN2A). Random effects models covarying for age, sex, ethnicity/race, and BMI revealed that participants with greater chronic stress exposure over the previous 6 months (b = 0.011, p = .04), perceived stress (b = 0.020, p < .001), and accumulated daily stress appraisals over the 8-week period (b = 0.013, p = .02) showed increased p16INK4a. No significant associations with LTL were found. These findings extend previous work on the impact of stress on biological aging by linking chronic stress exposure and daily stressful experiences to an accumulation of senescent cells. Findings also support the hypothesis that chronic stress is associated with accelerated aging by inducing cellular senescence, a common correlate of age-related diseases.
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Affiliation(s)
- Kelly E Rentscher
- Cousins Center for Psychoneuroimmunology, Semel Institute for Neuroscience and Human Behavior, University of California, 300 Medical Plaza, Los Angeles, CA 90095, USA.
| | - Judith E Carroll
- Cousins Center for Psychoneuroimmunology, Semel Institute for Neuroscience and Human Behavior, University of California, 300 Medical Plaza, Los Angeles, CA 90095, USA.
| | - Rena L Repetti
- Department of Psychology, University of California, 502 Portola Plaza, Los Angeles, CA 90095, USA.
| | - Steve W Cole
- Cousins Center for Psychoneuroimmunology, Semel Institute for Neuroscience and Human Behavior, University of California, 300 Medical Plaza, Los Angeles, CA 90095, USA.
| | - Bridget M Reynolds
- National Center for Health Statistics, Centers for Disease Control and Prevention, 3311 Toledo Road, Hyattsville, MD 20782, USA.
| | - Theodore F Robles
- Cousins Center for Psychoneuroimmunology, Semel Institute for Neuroscience and Human Behavior, University of California, 300 Medical Plaza, Los Angeles, CA 90095, USA; Department of Psychology, University of California, 502 Portola Plaza, Los Angeles, CA 90095, USA.
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Wang Q, Zhan Y, Pedersen NL, Fang F, Hägg S. Telomere Length and All-Cause Mortality: A Meta-analysis. Ageing Res Rev 2018; 48:11-20. [PMID: 30254001 DOI: 10.1016/j.arr.2018.09.002] [Citation(s) in RCA: 187] [Impact Index Per Article: 31.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 08/09/2018] [Accepted: 09/10/2018] [Indexed: 01/06/2023]
Abstract
Telomere attrition is associated with increased morbidity and mortality of various age-related diseases. Reports of association between telomere length (TL) and all-cause mortality remain inconsistent. In the present study, a meta-analysis was performed using published cohort studies and un-published data from the Swedish Twin Registry (STR). Twenty-five studies were included: four STR cohorts (12,083 individuals with 2517 deaths) and 21 published studies. In the STR studies, one standard deviation (SD) decrement of leukocyte TL corresponded to 13% increased all-cause mortality risk (95% confidence interval [CI]: 7%-19%); individuals in the shortest TL quarter had 44% higher hazard (95% CI: 27%-63%) than those in the longest quarter. Meta-analysis of all eligible studies (121,749 individuals with 21,763 deaths) revealed one SD TL decrement-associated hazard ratio of 1.09 (95% CI: 1.06-1.13); those in the shortest TL quarter had 26% higher hazard (95% CI: 15%-38%) compared to the longest quarter, although between-study heterogeneity was observed. Analyses stratified by age indicated that the hazard ratio was smaller in individuals over 80 years old. In summary, short telomeres are associated with increased all-cause mortality risk in the general population. However, TL measurement techniques and age at measurement contribute to the heterogeneity of effect estimation.
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Affiliation(s)
- Qi Wang
- Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Techology, Wuhan, 430030, China; Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Nobels väg 12A, Stockholm 17177, Sweden.
| | - Yiqiang Zhan
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Nobels väg 12A, Stockholm 17177, Sweden
| | - Nancy L Pedersen
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Nobels väg 12A, Stockholm 17177, Sweden
| | - Fang Fang
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Nobels väg 12A, Stockholm 17177, Sweden
| | - Sara Hägg
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Nobels väg 12A, Stockholm 17177, Sweden
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Rapid shortening of leukocyte telomeres is associated with poorer pulmonary function among healthy adults. Respir Med 2018; 145:73-79. [DOI: 10.1016/j.rmed.2018.10.026] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2018] [Revised: 09/27/2018] [Accepted: 10/24/2018] [Indexed: 01/05/2023]
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17
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Sillanpää E, Laakkonen EK, Vaara E, Rantanen T, Kovanen V, Sipilä S, Kaprio J, Ollikainen M. Biological clocks and physical functioning in monozygotic female twins. BMC Geriatr 2018; 18:83. [PMID: 29614968 PMCID: PMC5883300 DOI: 10.1186/s12877-018-0775-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Accepted: 03/26/2018] [Indexed: 02/06/2023] Open
Abstract
Background Biomarkers of biological aging – DNA methylation age (DNAm age) and leukocyte telomere length (LTL)– correlate strongly with chronological age across the life course. It is, however, unclear how these measures of cellular wear and tear are associated with muscle strength and functional capacity, which are known to decline with older age and are associated with mortality. We investigated if DNAm age and LTL were associated with body composition and physical functioning by examining 48 monozygotic twin sisters. Methods White blood cell DNAm age (predicted years) was calculated from Illumina 450 k BeadChip methylation data using an online calculator. DNAm age acceleration was defined from the residuals derived from a linear regression model of DNAm age on chronological age. LTL was measured by qPCR. Total body percentage of fat and lean mass were estimated using bioimpedance. Physical functioning was measured by grip strength, knee extension strength and by 10 m maximal walking speed test. Results In all participants, DNAm age (58.4 ± 6.6) was lower than chronological age (61.3 ± 5.9 years). Pairwise correlations of monozygotic co-twins were high for DNAm age (0.88, 95% CI 0.79, 0.97), age acceleration (0.68, 95% CI 0.30, 0.85) and LTL (0.77, 95% CI 0.60, 0.94). Increased age acceleration i.e. faster epigenetic aging compared to chronological age was associated with lower grip strength (β = − 5.3 SE 1.9 p = 0.011), but not with other measures of physical functioning or body composition. LTL was not associated with body composition or physical functioning. Conclusions To conclude, accelerated DNAm age is associated with lower grip strength, a biomarker known to be associated with physiological aging, and which predicts decline in physical functioning and mortality. Further studies may clarify whether epigenetic aging explains the decline in muscle strength with aging or whether DNAm age just illustrates the progress of aging. Electronic supplementary material The online version of this article (10.1186/s12877-018-0775-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Elina Sillanpää
- Gerontology Research Center, Faculty of Sport and Health Sciences, University of Jyväskylä, P.O. Box 35 (VIV), FIN-40014, Jyväskylä, Finland. .,Institute for Molecular Medicine Finland (FIMM), University of Helsinki, Helsinki, Finland.
| | - Eija K Laakkonen
- Gerontology Research Center, Faculty of Sport and Health Sciences, University of Jyväskylä, P.O. Box 35 (VIV), FIN-40014, Jyväskylä, Finland
| | - Elina Vaara
- Department of Social Research, University of Helsinki, Helsinki, Finland
| | - Taina Rantanen
- Gerontology Research Center, Faculty of Sport and Health Sciences, University of Jyväskylä, P.O. Box 35 (VIV), FIN-40014, Jyväskylä, Finland
| | - Vuokko Kovanen
- Gerontology Research Center, Faculty of Sport and Health Sciences, University of Jyväskylä, P.O. Box 35 (VIV), FIN-40014, Jyväskylä, Finland
| | - Sarianna Sipilä
- Gerontology Research Center, Faculty of Sport and Health Sciences, University of Jyväskylä, P.O. Box 35 (VIV), FIN-40014, Jyväskylä, Finland
| | - Jaakko Kaprio
- Institute for Molecular Medicine Finland (FIMM), University of Helsinki, Helsinki, Finland.,Department of Public Health, University of Helsinki, Helsinki, Finland
| | - Miina Ollikainen
- Institute for Molecular Medicine Finland (FIMM), University of Helsinki, Helsinki, Finland.,Department of Public Health, University of Helsinki, Helsinki, Finland
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Mazidi M, Banach M, Kengne AP. Association between plasma trans fatty acids concentrations and leucocyte telomere length in US adults. Eur J Clin Nutr 2018; 72:581-586. [DOI: 10.1038/s41430-017-0065-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Revised: 08/20/2017] [Accepted: 10/24/2017] [Indexed: 11/09/2022]
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Infant HPA axis as a potential mechanism linking maternal mental health and infant telomere length. Psychoneuroendocrinology 2018; 88:38-46. [PMID: 29161636 DOI: 10.1016/j.psyneuen.2017.11.008] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2017] [Revised: 10/13/2017] [Accepted: 11/15/2017] [Indexed: 01/01/2023]
Abstract
Maternal depression has been suggested to be an independent risk factor for both dysregulated hypothalamic-pituitary-adrenal axis (HPA) functioning and shorter telomere length in offspring. In contrast, research suggests that individual differences in mindfulness may act as a protective factor against one's own telomere degradation. Currently, research has yet to investigate the association between longitudinal changes in maternal mental health (depressive symptoms and mindfulness) and salivary infant telomere length, and whether such changes might be mediated by alterations in infant cortisol response. In 48 mother-infant dyads, we investigated whether the changes in maternal mental health, when infants were 6-12 months of age, predicted change in infant cortisol reactivity and recovery over this period. We also investigated whether these changes in infant HPA functioning predicted subsequent infant salivary telomere length at 18 months of age. Furthermore, we investigated whether change in infant HPA functioning provided a potential pathway between changes in maternal mental health factors and infant salivary telomere length. Analyses revealed that increases in maternal depressive symptoms over that six-month period indirectly related to subsequent shorter infant telomere length through increased infant cortisol reactivity. Implications for the ways in which maternal mental health can impact offspring stress mechanisms related to aging and disease trajectories are discussed.
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Sultana Z, Maiti K, Dedman L, Smith R. Is there a role for placental senescence in the genesis of obstetric complications and fetal growth restriction? Am J Obstet Gynecol 2018; 218:S762-S773. [PMID: 29275823 DOI: 10.1016/j.ajog.2017.11.567] [Citation(s) in RCA: 94] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Revised: 10/23/2017] [Accepted: 11/08/2017] [Indexed: 12/11/2022]
Abstract
The placenta ages as pregnancy advances, yet its continued function is required for a successful pregnancy outcome. Placental aging is a physiological phenomenon; however, there are some placentas that show signs of aging earlier than others. Premature placental senescence and aging are implicated in a number of adverse pregnancy outcomes, including fetal growth restriction, preeclampsia, spontaneous preterm birth, and intrauterine fetal death. Here we discuss cellular senescence, a state of terminal proliferation arrest, and how senescence is regulated. We also explore the role of physiological placental senescence and how aberrant placental senescence alters placental function, contributing to the pathophysiology of fetal growth restriction, preeclampsia, spontaneous preterm labor/birth, and unexplained fetal death.
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Albizua I, Rambo-Martin BL, Allen EG, He W, Amin AS, Sherman SL. Women who carry a fragile X premutation are biologically older than noncarriers as measured by telomere length. Am J Med Genet A 2017; 173:2985-2994. [PMID: 28941155 DOI: 10.1002/ajmg.a.38476] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 08/12/2017] [Accepted: 08/21/2017] [Indexed: 01/25/2023]
Abstract
Women who carry a fragile X premutation, defined as having 55-200 unmethylated CGG repeats in the 5' UTR of the X-linked FMR1 gene, have a 20-fold increased risk for primary ovarian insufficiency (FXPOI). We tested the hypothesis that women with a premutation + FXPOI have shorter telomeres than those without FXPOI because they are "biologically older." Using linear regression, we found that women carrying a premutation (n = 172) have shorter telomeres and hence, are "biologically older" than women carrying the normal size allele (n = 81). Strikingly, despite having shorter telomeres, age was not statistically associated with their telomere length, in contrast to non-carrier controls. Further, telomere length within premutation carriers was not associated with repeat length but was associated with a diagnosis of FXPOI, although the latter finding may depend on FXPOI age of onset.
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Affiliation(s)
- Igor Albizua
- Department of Human Genetics, Emory University School of Medicine, Atlanta, Georgia
| | | | - Emily G Allen
- Department of Human Genetics, Emory University School of Medicine, Atlanta, Georgia
| | - Weiya He
- Department of Human Genetics, Emory University School of Medicine, Atlanta, Georgia
| | - Ashima S Amin
- Department of Human Genetics, Emory University School of Medicine, Atlanta, Georgia
| | - Stephanie L Sherman
- Department of Human Genetics, Emory University School of Medicine, Atlanta, Georgia
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Eastwood JR, Mulder E, Verhulst S, Peters A. Increasing the accuracy and precision of relative telomere length estimates by RT qPCR. Mol Ecol Resour 2017; 18:68-78. [DOI: 10.1111/1755-0998.12711] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Revised: 07/11/2017] [Accepted: 07/25/2017] [Indexed: 01/10/2023]
Affiliation(s)
| | - Ellis Mulder
- Groningen Institute for Evolutionary Life Sciences University of Groningen Groningen The Netherlands
| | - Simon Verhulst
- Groningen Institute for Evolutionary Life Sciences University of Groningen Groningen The Netherlands
| | - Anne Peters
- School of Biological Sciences Monash University Clayton Vic Australia
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Bhaumik P, Bhattacharya M, Ghosh P, Ghosh S, Kumar Dey S. Telomere length analysis in Down syndrome birth. Mech Ageing Dev 2017; 164:20-26. [PMID: 28327364 DOI: 10.1016/j.mad.2017.03.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Revised: 02/27/2017] [Accepted: 03/14/2017] [Indexed: 11/19/2022]
Abstract
Human reproductive fitness depends upon telomere chemistry. Maternal age, meiotic nondisjunction error and telomere length of mother of trisomic child are someway associated. Reports exhibiting maternal inheritance of telomere length in Down syndrome child are very scanty. To investigate this, we collected peripheral blood from 170 mothers of Down syndrome child and 186 age matched mothers of euploid child with their newly born babies. Telomere length was measured by restriction digestion - southern blotting technique. Meiotic nondisjunction error was detected by STR genotyping. Subjects are classified by age (old >35 years and young ˂35 years) and by meiotic error (MI and MII). Linear regression was run to explore the age - telomere length relationship in each maternal groups. The study reveals that with age, telomere erodes in length. Old MII mothers carry the shortest (p˂0.001), control mothers have the longest telomere and MI lies in between. Babies from older mother have longer telomere (p˂0.001) moreover; telomeres are longer in Down syndrome babies than control babies (p˂0.001). To conclude, this study represents not only the relation between maternal aging and telomere length but also explore the maternal heritability of telomere length in families with Down syndrome child.
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Affiliation(s)
- Pranami Bhaumik
- Department of Biotechnology, School of Biotechnology and Biological Sciences. Maulana Abul Kalam Azad University of Technology, West Bengal (Formerly known as West Bengal University of Technology) BF-142, Salt Lake City, Sector I, Kolkata, West Bengal, 700064, India
| | - Mandar Bhattacharya
- Department of Biotechnology, School of Biotechnology and Biological Sciences. Maulana Abul Kalam Azad University of Technology, West Bengal (Formerly known as West Bengal University of Technology) BF-142, Salt Lake City, Sector I, Kolkata, West Bengal, 700064, India
| | - Priyanka Ghosh
- Department of Biotechnology, School of Biotechnology and Biological Sciences. Maulana Abul Kalam Azad University of Technology, West Bengal (Formerly known as West Bengal University of Technology) BF-142, Salt Lake City, Sector I, Kolkata, West Bengal, 700064, India
| | - Sujay Ghosh
- Cytogenetics and Genomics Research Unit, Department of Zoology, University of Calcutta,(Ballygunge Science college campus), 35 Ballygunge Circular Road., Kolkata, West Bengal, 700019, India
| | - Subrata Kumar Dey
- Department of Biotechnology, School of Biotechnology and Biological Sciences. Maulana Abul Kalam Azad University of Technology, West Bengal (Formerly known as West Bengal University of Technology) BF-142, Salt Lake City, Sector I, Kolkata, West Bengal, 700064, India.
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Sultana Z, Maiti K, Aitken J, Morris J, Dedman L, Smith R. Oxidative stress, placental ageing-related pathologies and adverse pregnancy outcomes. Am J Reprod Immunol 2017; 77. [PMID: 28240397 DOI: 10.1111/aji.12653] [Citation(s) in RCA: 170] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Accepted: 01/20/2017] [Indexed: 12/22/2022] Open
Abstract
Oxidative stress (OS), an imbalance between free radical generation and antioxidant defence, is recognized as a key factor in the pathogenesis of adverse pregnancy outcomes. Although OS is a common future of normal pregnancy, persistent, overwhelming OS leads to consumption and decline of antioxidants, affecting placental antioxidant capacity and reducing systems. The accumulation of OS causes damage to lipids, proteins and DNA in the placental tissue that induces a form of accelerated ageing. Premature ageing of the placenta is associated with placental insufficiency that prevents the organ meeting the needs of the foetus, and as a consequence, the viability of the foetus is compromised. This review summarizes the literature regarding the role of OS and premature placental ageing in the pathophysiology of pregnancy complications.
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Affiliation(s)
- Zakia Sultana
- Mothers and Babies Research Centre, Hunter Medical Research Institute, Newcastle, NSW, Australia.,Faculty of Health and Medicine, School of Medicine and Public Health, University of Newcastle, Newcastle, NSW, Australia.,Priority Research Centre for Reproductive Science, University of Newcastle, Newcastle, NSW, Australia
| | - Kaushik Maiti
- Mothers and Babies Research Centre, Hunter Medical Research Institute, Newcastle, NSW, Australia.,Faculty of Health and Medicine, School of Medicine and Public Health, University of Newcastle, Newcastle, NSW, Australia.,Priority Research Centre for Reproductive Science, University of Newcastle, Newcastle, NSW, Australia
| | - John Aitken
- Priority Research Centre for Reproductive Science, University of Newcastle, Newcastle, NSW, Australia
| | - Jonathan Morris
- Kolling Institute, Royal North Shore Hospital, University of Sydney, Sydney, NSW, Australia
| | - Lee Dedman
- Faculty of Science and Information Technology, School of Design, Communication and Information Technology, University of Newcastle, Newcastle, NSW, Australia
| | - Roger Smith
- Mothers and Babies Research Centre, Hunter Medical Research Institute, Newcastle, NSW, Australia.,Faculty of Health and Medicine, School of Medicine and Public Health, University of Newcastle, Newcastle, NSW, Australia.,Priority Research Centre for Reproductive Science, University of Newcastle, Newcastle, NSW, Australia
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25
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Himbert C, Thompson H, Ulrich CM. Effects of Intentional Weight Loss on Markers of Oxidative Stress, DNA Repair and Telomere Length - a Systematic Review. Obes Facts 2017; 10:648-665. [PMID: 29237161 PMCID: PMC5836214 DOI: 10.1159/000479972] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Accepted: 07/27/2017] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Altered levels of markers of oxidative stress, DNA repair, and telomere integrity have been detected in obese individuals and may underlie the pathogenesis of obesity-related diseases. However, whether or not such effects are reversed by intentional weight loss has not been systematically reviewed. METHODS A literature search in PubMed/Medline identified 2,388 articles of which 21 studies (randomized controlled trial (RCT) (n = 10) and non-randomized intervention studies (n = 11)) were classified as testing the effects of intentional weight loss on i) oxidative stress (n = 15), ii) DNA repair (n = 2), and iii) telomere length (n = 4). RESULTS Across a broad range of intervention designs, diet-, exercise-, surgery-, balloon-induced weight loss regimens decreased oxidative stress measures. Studies investigating DNA repair capacity or telomere length as endpoints after weight loss were less common in number and yielded null or inconsistent results, respectively. CONCLUSION While this systematic review supports a role for intentional weight loss in reducing obesity-associated oxidative stress, it is not clear whether the effects are primary outcomes or secondary to improvement in obesity-associated insulin resistance and/or chronic inflammation. Although the lack of effect of intentional weight loss on DNA repair capacity might be anticipated given that oxidative stress is reduced, additional studies are needed. The inconsistent effects of weight loss on telomere length or DNA repair suggest the need for a re-assessment of intervention designs and assay methodology to definitively address this topic.
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Affiliation(s)
- Caroline Himbert
- Department of Population Sciences, Huntsman Cancer Institute, Salt Lake City, UT, USA
- Department of Population Health Sciences, University of Utah, Salt Lake City, UT, USA
- University Hospital Hamburg-Eppendorf, Hamburg, Germany
| | - Henry Thompson
- Cancer Prevention Laboratory, Colorado State University, Fort Collins, CO, USA
| | - Cornelia M. Ulrich
- Department of Population Sciences, Huntsman Cancer Institute, Salt Lake City, UT, USA
- Department of Population Health Sciences, University of Utah, Salt Lake City, UT, USA
- *Cornelia M. Ulrich, Department of Population Sciences, Huntsman Cancer Institute, 2000 Circle of Hope Drive, Room 4725, Salt Lake City, UT 84112, USA,
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Goglin SE, Farzaneh-Far R, Epel ES, Lin J, Blackburn EH, Whooley MA. Change in Leukocyte Telomere Length Predicts Mortality in Patients with Stable Coronary Heart Disease from the Heart and Soul Study. PLoS One 2016; 11:e0160748. [PMID: 27783614 PMCID: PMC5081189 DOI: 10.1371/journal.pone.0160748] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Accepted: 07/25/2016] [Indexed: 11/18/2022] Open
Abstract
Background Short telomere length independently predicts mortality in patients with coronary heart disease. Whether 5-year change in telomere length predicts subsequent mortality in patients with coronary heart disease has not been evaluated. Methods In a prospective cohort study of 608 individuals with stable coronary artery disease, we measured leukocyte telomere length at baseline and after five years of follow-up. We divided the sample into tertiles of telomere change: shortened, maintained or lengthened. We used Cox survival models to evaluate 5-year change in telomere length as a predictor of mortality. Results During an average of 4.2 years follow-up, there were 149 deaths. Change in telomere length was inversely predictive of all-cause mortality. Using the continuous variable of telomere length change, each standard deviation (325 base pair) greater increase in telomere length was associated with a 24% reduction in mortality (HR 0.76, 95% CI 0.61–0.94; p = 0.01), adjusted for age, sex, waist to hip ratio, exercise capacity, LV ejection fraction, serum creatinine, and year 5 telomere length. Mortality occurred in 39% (79/203) of patients who experienced telomere shortening, 22% (45/203) of patients whose telomere length was maintained, and 12% (25/202) of patients who experienced telomere lengthening (p<0.001). As compared with patients whose telomere length was maintained, those who experienced telomere lengthening were 56% less likely to die (HR 0.44, 95% CI, 0.23–0.87). Conclusions In patients with coronary heart disease, an increase in leukocyte telomere length over 5 years is associated with decreased mortality.
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Affiliation(s)
- Sarah E. Goglin
- Department of Medicine, University of California San Francisco, San Francisco, CA, 94143, United States of America
| | - Ramin Farzaneh-Far
- Department of Psychiatry, University of California San Francisco, San Francisco, CA, 94143, United States of America
| | - Elissa S. Epel
- Department of Psychiatry, University of California San Francisco, San Francisco, CA, 94143, United States of America
| | - Jue Lin
- Department of Biochemistry and Biophysics, UCSF, San Francisco, CA, 94143, United States of America
| | | | - Mary A. Whooley
- Department of Medicine, University of California San Francisco, San Francisco, CA, 94143, United States of America
- Veterans Affairs Medical Center, San Francisco, CA, 94121, United States of America
- * E-mail:
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Kim KS, Kwak JW, Lim SJ, Park YK, Yang HS, Kim HJ. Oxidative Stress-induced Telomere Length Shortening of Circulating Leukocyte in Patients with Obstructive Sleep Apnea. Aging Dis 2016; 7:604-613. [PMID: 27699083 PMCID: PMC5036955 DOI: 10.14336/ad.2016.0215] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Accepted: 02/15/2016] [Indexed: 12/21/2022] Open
Abstract
The main mechanism of pathogenesis which causes systemic complications in obstructive sleep apnea (OSA) patients is believed to be intermittent hypoxia-induced intermediary effect and it depends on the burden of oxidative stress during sleep. We aimed to search the predictive markers which reflect the burden of systemic oxidative stress in patients with OSA and whether excessive telomere length shortening is a characteristic feature that can assess oxidative stress levels. We used quantitative PCR to measure telomere length using peripheral blood genomic DNA. Telomere lengths were compared in an age- and body mass index (BMI)-dependent manner in 34 healthy volunteers and 43 OSA subjects. We also performed reactive oxygen species assay to measure the concentration of hydrogen peroxide in the peripheral blood of healthy volunteers and OSA subjects. We found that the serum concentration of hydrogen peroxide was considerably higher in OSA patients, and that this was closely related with the severity of OSA. Significantly shortened telomere length was observed in the circulating leukocytes of the peripheral blood of OSA patients, and telomere length shortening was aggravated more acutely in an age- and BMI-dependent manner. An inverse correlation was observed between the concentration of hydrogen peroxide and the telomere length of OSA patients and excessive telomere length shortening was also linked to severity of OSA. The results provided evidence that telomere length shortening or excessive cellular aging might be distinctive in circulating leukocyte of OSA patients and may be an predictive biomarker for reflect the burden of oxidative stress in the peripheral blood of OSA patients.
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Affiliation(s)
- Kyung Soo Kim
- 2Department of Otorhinolaryngology and Head & Neck Surgery, Chung-Ang University College of Medicine, Seoul, Korea
| | - Jin Wook Kwak
- 2Department of Otorhinolaryngology and Head & Neck Surgery, Chung-Ang University College of Medicine, Seoul, Korea
| | - Su Jin Lim
- 2Department of Otorhinolaryngology and Head & Neck Surgery, Chung-Ang University College of Medicine, Seoul, Korea
| | - Yong Kyun Park
- 2Department of Otorhinolaryngology and Head & Neck Surgery, Chung-Ang University College of Medicine, Seoul, Korea
| | - Hoon Shik Yang
- 2Department of Otorhinolaryngology and Head & Neck Surgery, Chung-Ang University College of Medicine, Seoul, Korea
| | - Hyun Jik Kim
- 1Department of Otorhinolaryngology, Seoul National University College of Medicine
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28
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Eisenberg DT. Telomere length measurement validity: the coefficient of variation is invalid and cannot be used to compare quantitative polymerase chain reaction and Southern blot telomere length measurement techniques. Int J Epidemiol 2016; 45:1295-1298. [PMID: 27581804 DOI: 10.1093/ije/dyw191] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Affiliation(s)
- Dan Ta Eisenberg
- Department of Anthropology, and Center for Studies in Demography and Ecology, University of Washington,Campus Box 353100, Seattle, WA 98195, USA. E-mail:
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29
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Appleby S, Pearson JF, Aitchison A, Spittlehouse JK, Joyce PR, Kennedy MA. Mean telomere length is not associated with current health status in a 50-year-old population sample. Am J Hum Biol 2016; 29. [DOI: 10.1002/ajhb.22906] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Revised: 04/28/2016] [Accepted: 08/04/2016] [Indexed: 01/21/2023] Open
Affiliation(s)
- Sarah Appleby
- Gene Structure and Function Laboratory; Department of Pathology; University of Otago; Christchurch New Zealand
| | - John F. Pearson
- Biostatistics and Computational Biology Unit; University of Otago; Christchurch New Zealand
| | - Alan Aitchison
- Gene Structure and Function Laboratory; Department of Pathology; University of Otago; Christchurch New Zealand
| | | | - Peter R. Joyce
- Department of the Dean; University of Otago; Christchurch New Zealand
| | - Martin A. Kennedy
- Gene Structure and Function Laboratory; Department of Pathology; University of Otago; Christchurch New Zealand
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30
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Telomere Length Maintenance and Cardio-Metabolic Disease Prevention Through Exercise Training. Sports Med 2016; 46:1213-37. [DOI: 10.1007/s40279-016-0482-4] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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31
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Leukocyte telomere length and mortality in the National Health and Nutrition Examination Survey, 1999-2002. Epidemiology 2016; 26:528-35. [PMID: 26039272 DOI: 10.1097/ede.0000000000000299] [Citation(s) in RCA: 113] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND This study examined the association between leukocyte telomere length--a marker of cell aging--and mortality in a nationally representative sample of US adults ages 50-84 years. We also examined moderating effects of age, sex, race/ethnicity, and education. METHODS Data were from the National Health and Nutrition Examination Survey, 1999-2002 (n = 3,091). Cox proportional hazards regression was used to estimate the risk of all-cause and cause- specific mortality adjusting for sociodemographic characteristics, smoking, body mass index, and chronic conditions. RESULTS Eight hundred and seventy deaths occurred over an average of 9.5 years of follow-up. In the full sample, a decrease of 1 kilobase pair in telomere length at baseline was marginally associated with a 10% increased hazard of all-cause mortality (hazard ratio [HR]: 1.1, 95% confidence interval [CI]: 0.9, 1.4) and a 30% increased hazard of death due to diseases other than cardiovascular disease or cancer (HR: 1.3, 95% CI: 0.9, 1.9). Among African-American but not white or Mexican-American respondents, a decrease of 1 kilobase pair in telomere length at baseline was associated with a two-fold increased hazard of cardiovascular mortality (HR: 2.0, 95% CI: 1.3, 3.1). There was no association between telomere length and cancer mortality. CONCLUSIONS The association between leukocyte telomere length and mortality differs by race/ethnicity and cause of death.
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Thomson WM, Zeng J, Broadbent JM, Foster Page LA, Shalev I, Moffitt TE, Caspi A, Williams SM, Braithwaite AW, Robertson SP, Poulton R. Telomere length and periodontal attachment loss: a prospective cohort study. J Clin Periodontol 2016; 43:121-7. [PMID: 26713854 DOI: 10.1111/jcpe.12499] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/22/2015] [Indexed: 01/08/2023]
Abstract
AIM The aim of the study was to examine the association between telomere erosion and periodontitis in a long-standing prospective cohort study of New Zealand adults. Specific hypotheses tested were as follows: (i) that exposure to periodontitis at ages 26 and 38 was associated with accelerated leucocyte telomere erosion and (ii) that accelerated leucocyte telomere erosion was associated with higher rates of periodontitis by ages 26 and 38. MATERIALS AND METHODS Periodontal attachment loss data were collected at ages 26 and 38. Blood samples taken at the same ages were analysed to obtain estimates of leucocyte telomere length and erosion over a 12-year period. RESULTS Overall, the mean telomere length was reduced by 0.15 T/S ratio (adjusted) from age 26 to 38 among the 661 participants reported on here. During the same period, the mean attachment loss increased by 10%, after adjusting for sex, socio-economic status and smoking. Regression models showed that attachment loss did not predict telomere length, and that telomere erosion did not predict attachment loss. CONCLUSIONS Although both periodontitis and telomere length are age-dependent, they do not appear to be linked, suggesting that determination of leucocyte telomere length may not be a promising clinical approach at this age for identifying people who are at risk for periodontitis.
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Affiliation(s)
- William Murray Thomson
- Sir John Walsh Research Institute, School of Dentistry, The University of Otago, Dunedin, New Zealand
| | - Jiaxu Zeng
- Department of Preventive and Social Medicine, Dunedin School of Medicine, The University of Otago, Dunedin, New Zealand
| | - Jonathan M Broadbent
- Sir John Walsh Research Institute, School of Dentistry, The University of Otago, Dunedin, New Zealand
| | - Lyndie A Foster Page
- Sir John Walsh Research Institute, School of Dentistry, The University of Otago, Dunedin, New Zealand
| | - Idan Shalev
- Department of Biobehavioral Health, Pennsylvania State University, University Park, PA, USA
| | - Terrie E Moffitt
- Department of Psychology and Neuroscience, Duke University, Durham, NC, USA.,Department of Psychiatry and Behavioral Sciences, Duke University, Durham, NC, USA.,Social, Genetic, and Developmental Psychiatry Centre, Institute of Psychiatry, King's College, London, UK
| | - Avshalom Caspi
- Department of Psychology and Neuroscience, Duke University, Durham, NC, USA.,Department of Psychiatry and Behavioral Sciences, Duke University, Durham, NC, USA.,Social, Genetic, and Developmental Psychiatry Centre, Institute of Psychiatry, King's College, London, UK
| | - Sheila M Williams
- Department of Preventive and Social Medicine, Dunedin School of Medicine, The University of Otago, Dunedin, New Zealand
| | - Antony W Braithwaite
- Department of Pathology, School of Medicine, University of Otago, Dunedin, New Zealand
| | - Stephen P Robertson
- Department of Paediatrics and Child Health, Dunedin School of Medicine, University of Otago, Dunedin, New Zealand
| | - Richie Poulton
- Dunedin Multidisciplinary Health and Development Research Unit, Department of Psychology, University of Otago, Dunedin, New Zealand
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Smearman EL, Yu T, Brody GH. Variation in the oxytocin receptor gene moderates the protective effects of a family-based prevention program on telomere length. Brain Behav 2016; 6:e00423. [PMID: 27110446 PMCID: PMC4834932 DOI: 10.1002/brb3.423] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Revised: 08/24/2015] [Accepted: 11/14/2015] [Indexed: 01/16/2023] Open
Abstract
INTRODUCTION Parent-child relationships with high conflict and low warmth and support are associated with later adverse behavioral and physiological child outcomes. These outcomes include shorter telomere lengths, the repetitive sequences at the ends of chromosomes that have been utilized as a biomarker for chronic stress. Our research group furthered this by exploring telomere length outcomes following a family-based prevention program and identified reduced telomere shortening 5 years post intervention among those originally exposed to nonsupportive parenting and randomized to the intervention condition. However, not all individuals respond equally, and a growing literature suggests genetic sensitivity to one's environment, with variations in the oxytocin receptor gene (OXTR) potentially influencing this sensitivity. METHODS We utilized data from African American youths (mean age 17) randomized to intervention (n = 100) or control condition (n = 91) with baseline assessments of genetic status and nonsupportive parenting, and 5-year follow-up assessments of telomere length. RESULTS We found a significant three-way interaction between nonsupportive parenting, intervention condition, and OXTR rs53576 genotype. OXTR GG individuals, who are suggested to be more sensitive to their social environment, exhibited significantly more variability, evidencing the shortest telomeres when exposed to nonsupportive parenting and randomized to the control condition, and similar telomere lengths to non at-risk groups when randomized to the intervention. In contrast, those with the A allele showed no statistical difference in telomere lengths across parental and intervention conditions. Subsequent analyses suggest that these findings may be mediated through chronic anger, whereby GG individuals exposed to nonsupportive parenting and randomized to the control condition had a greater increase in chronic anger by study follow-up, compared to those in the intervention, and this change associated with greater telomere shortening. CONCLUSIONS These findings highlight the importance of individual differences and potential role of genetic status in moderating the relationship between environmental contexts and biological outcomes.
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Affiliation(s)
- Erica L Smearman
- Behavioral Sciences and Health Education Rollins School of Public Health Emory University 1518 Clifton Road Northeast Atlanta Georgia 30322; Center for Translational and Social Neuroscience Emory University Atlanta Georgia 30322
| | - Tianyi Yu
- Center for Family Research University of Georgia 1095 College Station Road Athens Georgia 30602-4527
| | - Gene H Brody
- Behavioral Sciences and Health Education Rollins School of Public Health Emory University 1518 Clifton Road Northeast Atlanta Georgia 30322; Center for Family Research University of Georgia 1095 College Station Road Athens Georgia 30602-4527
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Sukenik-Halevy R, Amiel A, Kidron D, Liberman M, Ganor-Paz Y, Biron-Shental T. Telomere homeostasis in trophoblasts and in cord blood cells from pregnancies complicated with preeclampsia. Am J Obstet Gynecol 2016; 214:283.e1-283.e7. [PMID: 26321036 DOI: 10.1016/j.ajog.2015.08.050] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Revised: 08/11/2015] [Accepted: 08/19/2015] [Indexed: 10/23/2022]
Abstract
BACKGROUND Telomeres are nucleoprotein structures, essential for chromosome stability and cell survival. Telomeres are progressively shortened with each cell division and by environmental factors. Telomere loss has been linked to age and stress-induced premature senescence. Dysfunctional telomeres tend to form aggregates, which consist of the end-to-end fusion of telomeres. Telomere elongation is carried out by telomerase, which is a specific reverse transcriptase capable of adding telomeric repeats to chromosome termini. The TERC gene encodes the RNA template of the telomerase. Another compensatory mechanism that is enhanced in response to telomere shortening and senescence is the telomere capture (TC). Telomere shortening and elevated aggregate formation have been observed in trophoblasts from pregnancies complicated with preeclampsia (PE). OBJECTIVE We opted to study mechanisms of telomere shortening in trophoblasts from pregnancies complicated with PE and to assess telomere length and homeostasis in fetal cord blood cells from PE pregnancies. STUDY DESIGN Placental specimens and cord blood samples from uncomplicated pregnancies and from pregnancies complicated with PE were collected. Staining with 4',6-diamidino-2-phenylindole was used to assess nuclear fragmentation: senescence-associated heterochromatin foci (SAHF). Fluorescence in situ hybridization was used to evaluate TERC gene copy number and TC. Telomere length and aggregate formation were assessed in cord blood using quantitative fluorescence in situ hybridization. Nonparametric Kruskal-Wallis and Mann-Whitney U tests were applied to test the differences between the study groups. RESULTS Nine samples from pregnant patients with PE without intrauterine growth restriction and 14 samples from uncomplicated pregnancies that served as controls were collected. In cord blood cells, no differences were observed in telomere length, aggregate formation, TERC copy number, TC, or SAHF between PE and controls. In PE trophoblasts the percentage of cells with SAHF was higher in PE trophoblasts compared to controls (56.8 SD = 10.5% vs 35.2 SD = 10.7%, P = .028). The percentage of cells with abnormal TERC copy number was increased in PE trophoblasts compared to controls (31 ± 3.6% vs 12.97 SD = 5%, P = .004) as well as the percentage of cells with TC (27.4 SD = 9.4% vs 16 SD = 4.67%, P = .028). CONCLUSION We suggest that telomere shortening in PE trophoblasts is linked to cellular increased senescence. Alterations in telomere homeostasis mechanisms are present in such cases. These findings support the role of telomeres in the pathogenesis of trophoblastic dysfunction in PE. The lack of telomere shortening, modified telomere homeostasis mechanisms, and increased senescence in cord blood from pregnancies complicated with PE suggests that these processes are probably restricted primarily to the placenta.
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Fairlie J, Holland R, Pilkington JG, Pemberton JM, Harrington L, Nussey DH. Lifelong leukocyte telomere dynamics and survival in a free-living mammal. Aging Cell 2016; 15:140-8. [PMID: 26521726 PMCID: PMC4717268 DOI: 10.1111/acel.12417] [Citation(s) in RCA: 102] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/24/2015] [Indexed: 12/22/2022] Open
Abstract
Telomeres play a fundamental role in the maintenance of genomic integrity at a cellular level, and average leukocyte telomere length (LTL) has been proposed as a biomarker of organismal aging. However, studies tracking LTL across the entire life course of individuals are lacking. Here, we examined lifelong patterns of variation in LTL among four birth cohorts of female Soay sheep (Ovis aries) that were longitudinally monitored and sampled from birth to death. Over the first 4 months of life, there was within‐individual loss of LTL, consistent with findings in the human and primate literature, but there was little evidence of consistent LTL loss associated with age after this point. Overall, we observed only weak evidence of individual consistency in LTL across years and over the entire lifespan: Within‐individual variation was considerable, and birth cohorts differed markedly in their telomere dynamics. Despite the high levels of LTL variation within the lifetimes of individuals, there remained significant associations between LTL and longevity. Detailed analysis of the longitudinal data set showed that this association was driven by improved survival of individuals with longer LTL over the first 2 years of life. There was no evidence that LTL predicted survival in later adulthood. Our data provide the first evidence from a mammal that LTL can predict mortality and lifespan under natural conditions, and also highlight the potentially dynamic nature of LTL within the lifetimes of individuals experiencing a complex and highly variable environment.
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Affiliation(s)
- Jennifer Fairlie
- Institute of Evolutionary Biology; University of Edinburgh; Edinburgh EH9 3FL UK
| | - Rebecca Holland
- Institute of Evolutionary Biology; University of Edinburgh; Edinburgh EH9 3FL UK
| | - Jill G. Pilkington
- Institute of Evolutionary Biology; University of Edinburgh; Edinburgh EH9 3FL UK
| | | | - Lea Harrington
- Institute for Research in Immunology & Cancer; Université de Montréal; Montreal QC Canada H3T 1J4
| | - Daniel H. Nussey
- Institute of Evolutionary Biology; University of Edinburgh; Edinburgh EH9 3FL UK
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36
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Brody GH, Yu T, Beach SRH, Philibert RA. Prevention effects ameliorate the prospective association between nonsupportive parenting and diminished telomere length. PREVENTION SCIENCE : THE OFFICIAL JOURNAL OF THE SOCIETY FOR PREVENTION RESEARCH 2016; 16:171-80. [PMID: 24599483 DOI: 10.1007/s11121-014-0474-2] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Telomere length (TL) is an indicator of general systemic aging, with diminished TL associated with several chronic diseases of aging and with heightened mortality risk. Research has begun to focus on the ways in which stress contributes to telomere attrition. The purposes of this study were (a) to establish whether exposure to nonsupportive parenting, defined as high levels of conflict and rancor with low levels of warmth and emotional support, at age 17 would forecast TL 5 years later; and (b) to determine whether participation in an efficacious family-centered prevention program could ameliorate any associations that emerged. Rural African American adolescents participated in the Adults in the Making (AIM) program or a control condition. Primary caregivers provided data on nonsupportive parenting during a pretest when adolescents were age 17. Adolescents provided data on anger at the pretest and at a posttest administered 7 months later. When the youths were age 22, TL was assayed from a blood draw. The results indicated that heightened nonsupportive parenting forecast diminished TL among young adults in the control condition but not among those who participated in AIM; socioeconomic status risk, life stress, and the use of alcohol and cigarettes at age 17, and blood pressure and body mass index at age 22, were controlled. Subsequent exploratory analyses suggested that AIM-induced reductions in adolescents' anger served as a mediator connecting group assignment to TL. The results suggest that the cellular-level sequelae of nonsupportive parenting and stress are not immutable.
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Affiliation(s)
- Gene H Brody
- Center for Family Research, University of Georgia, 1095 College Station Road, Athens, Georgia, 30602-4527,
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37
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Entringer S, Buss C, Wadhwa PD. Prenatal stress, development, health and disease risk: A psychobiological perspective-2015 Curt Richter Award Paper. Psychoneuroendocrinology 2015; 62:366-75. [PMID: 26372770 PMCID: PMC4674548 DOI: 10.1016/j.psyneuen.2015.08.019] [Citation(s) in RCA: 195] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Accepted: 08/19/2015] [Indexed: 12/14/2022]
Abstract
The long-term consequences of exposure to excess stress, particularly during sensitive developmental windows, on the initiation and progression of many complex, common physical and mental disorders that confer a major global burden of disease are well established. The period of intrauterine life represents among the most sensitive of these windows, at which time the effects of stress may be transmitted inter-generationally from a mother to her as-yet-unborn child. As explicated by the concept of fetal or developmental programming of health and disease susceptibility, a growing body of evidence supports the notion that health and disease susceptibility is determined by the dynamic interplay between genetic makeup and environment, particularly during intrauterine and early postnatal life. Except in extreme cases, an adverse intrauterine exposure may not, per se, 'cause' disease, but, instead, may determine propensity for disease(s) in later life (by shaping phenotypic responsivity to endogenous and exogenous disease-related risk conditions). Accumulating evidence suggests that maternal psychological and social stress during pregnancy represents one such condition that may adversely affect the developing child, with important implications for a diverse range of physical and mental health outcomes. In this paper we review primarily our own contributions to the field of maternal stress during pregnancy and child mental and physical health-related outcomes. We present findings on stress-related maternal-placental-fetal endocrine and immune/inflammatory processes that may mediate the effects of various adverse conditions during pregnancy on the developing human embryo and fetus. We enunciate conceptual and methodological issues related to the assessment of stress during pregnancy and discuss potential mechanisms of intergenerational transmission of the effects of stress. Lastly, we describe on-going research and some future directions of our program.
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Affiliation(s)
- Sonja Entringer
- Department of Medical Psychology, Charité University Medicine Berlin, Luisenstraβe 57, 10117 Berlin, Germany; Departments of Pediatrics, University of California, Irvine, School of Medicine, 3117 Gillespie Neuroscience Research Facility (GNRF), 837 Health Sciences Road Irvine, CA 92697, USA.
| | - Claudia Buss
- Department of Medical Psychology, Charité University Medicine Berlin, Luisenstraβe 57, 10117 Berlin, Germany; Departments of Pediatrics, University of California, Irvine, School of Medicine, 3117 Gillespie Neuroscience Research Facility (GNRF), 837 Health Sciences Road Irvine, CA 92697, USA.
| | - Pathik D. Wadhwa
- Department of Pediatrics, University of California, Irvine, 3117
Gillespie Neuroscience Research Facility (GNRF), 837 Health Sciences Drive, Mail
Code: 4260, Irvine, CA 92697, USA,Department of Obstetrics & Gynecology, University of California,
Irvine, 3117 Gillespie Neuroscience Research Facility (GNRF), 837 Health Sciences
Drive, Mail Code: 4260, Irvine, CA 92697, USA,Department of Epidemiology, University of California, Irvine, 3117
Gillespie Neuroscience Research Facility (GNRF), 837 Health Sciences Drive, Mail
Code: 4260, Irvine, CA 92697, USA,Department of Psychiatry & Human Behavior, University of
California, Irvine, 3117 Gillespie Neuroscience Research Facility (GNRF), 837 Health
Sciences Drive, Mail Code: 4260, Irvine, CA 92697, USA
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Ray A, Hong CS, Feingold E, Ghosh P, Ghosh P, Bhaumik P, Dey S, Ghosh S. Maternal Telomere Length and Risk of Down Syndrome: Epidemiological Impact of Smokeless Chewing Tobacco and Oral Contraceptive on Segregation of Chromosome 21. Public Health Genomics 2015; 19:11-8. [DOI: 10.1159/000439245] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Accepted: 08/07/2015] [Indexed: 11/19/2022] Open
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Martin-Ruiz CM, Baird D, Roger L, Boukamp P, Krunic D, Cawthon R, Dokter MM, van der Harst P, Bekaert S, de Meyer T, Roos G, Svenson U, Codd V, Samani NJ, McGlynn L, Shiels PG, Pooley KA, Dunning AM, Cooper R, Wong A, Kingston A, von Zglinicki T. Reproducibility of telomere length assessment: an international collaborative study. Int J Epidemiol 2015; 44:1673-83. [PMID: 25239152 PMCID: PMC4681105 DOI: 10.1093/ije/dyu191] [Citation(s) in RCA: 121] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/28/2014] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Telomere length is a putative biomarker of ageing, morbidity and mortality. Its application is hampered by lack of widely applicable reference ranges and uncertainty regarding the present limits of measurement reproducibility within and between laboratories. METHODS We instigated an international collaborative study of telomere length assessment: 10 different laboratories, employing 3 different techniques [Southern blotting, single telomere length analysis (STELA) and real-time quantitative PCR (qPCR)] performed two rounds of fully blinded measurements on 10 human DNA samples per round to enable unbiased assessment of intra- and inter-batch variation between laboratories and techniques. RESULTS Absolute results from different laboratories differed widely and could thus not be compared directly, but rankings of relative telomere lengths were highly correlated (correlation coefficients of 0.63-0.99). Intra-technique correlations were similar for Southern blotting and qPCR and were stronger than inter-technique ones. However, inter-laboratory coefficients of variation (CVs) averaged about 10% for Southern blotting and STELA and more than 20% for qPCR. This difference was compensated for by a higher dynamic range for the qPCR method as shown by equal variance after z-scoring. Technical variation per laboratory, measured as median of intra- and inter-batch CVs, ranged from 1.4% to 9.5%, with differences between laboratories only marginally significant (P = 0.06). Gel-based and PCR-based techniques were not different in accuracy. CONCLUSIONS Intra- and inter-laboratory technical variation severely limits the usefulness of data pooling and excludes sharing of reference ranges between laboratories. We propose to establish a common set of physical telomere length standards to improve comparability of telomere length estimates between laboratories.
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Affiliation(s)
| | - Duncan Baird
- Institute of Cancer and Genetics, Cardiff University, Cardiff, UK
| | - Laureline Roger
- Institute of Cancer and Genetics, Cardiff University, Cardiff, UK
| | - Petra Boukamp
- Deutsches Krebsforschungszentrum (DKFZ), Heidelberg, Germany
| | - Damir Krunic
- Deutsches Krebsforschungszentrum (DKFZ), Heidelberg, Germany
| | - Richard Cawthon
- Department of Human Genetics, University of Utah, Salt Lake City, UT, USA
| | - Martin M Dokter
- Department of Cardiology, University of Groningen, Groningen, The Netherlands
| | - Pim van der Harst
- Department of Cardiology, University of Groningen, Groningen, The Netherlands
| | - Sofie Bekaert
- Bimetra, Clinical Research Center, Ghent University Hospital, Ghent, Belgium
| | - Tim de Meyer
- Department of Mathematical Modelling, Statistics and Bioinformatics, Ghent University, Ghent, Belgium
| | - Goran Roos
- Department of Medical Biosciences, Umeå University, Umeå, Sweden
| | - Ulrika Svenson
- Department of Medical Biosciences, Umeå University, Umeå, Sweden
| | - Veryan Codd
- Department of Cardiovascular Sciences, University of Leicester, Leicester, UK
| | - Nilesh J Samani
- Department of Cardiovascular Sciences, University of Leicester, Leicester, UK
| | - Liane McGlynn
- Institute of Cancer Sciences, University of Glasgow, Glasgow, UK
| | - Paul G Shiels
- Institute of Cancer Sciences, University of Glasgow, Glasgow, UK
| | | | - Alison M Dunning
- Department of Oncology, Centre for Cancer Genetic Epidemiology, University of Cambridge, Cambridge, UK and
| | - Rachel Cooper
- MRC Unit for Lifelong Health and Ageing at UCL, London, UK
| | - Andrew Wong
- MRC Unit for Lifelong Health and Ageing at UCL, London, UK
| | - Andrew Kingston
- Newcastle University Institute for Ageing, Newcastle University, Newcastle, UK
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40
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Association between telomere length and chromosome 21 nondisjunction in the oocyte. Hum Genet 2015; 134:1263-70. [PMID: 26407969 DOI: 10.1007/s00439-015-1603-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Accepted: 09/15/2015] [Indexed: 10/23/2022]
Abstract
Chromosome 21 nondisjunction in oocytes is the most common cause of trisomy 21, the primary chromosomal abnormality responsible for Down syndrome (DS). This specific type of error is estimated to account for over 90 % of live births with DS, with maternal age being the best known risk factor for chromosome 21 nondisjunction. The loss of telomere length and the concomitant shortening of chromosomes are considered a biological marker for aging. Thus, we tested the hypothesis that mothers who had a maternal nondisjunction error leading to a live birth with DS (n = 404) have shorter telomeres than mothers with live births without DS (n = 42). In effect, our hypothesis suggests that mothers of children with DS will appear "biologically older" as compared to the mothers of euploid children. We applied a quantitative PCR assay to measure the genome-wide relative telomere length to test this hypothesis. The results of our study support the hypothesis that young mothers of DS babies are "biologically older" than mothers of euploid babies in the same age group and supports telomere length as a biomarker of age and hence risk for chromosome nondisjunction.
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Stathopoulou MG, Petrelis AM, Buxton JL, Froguel P, Blakemore AIF, Visvikis-Siest S. Genetic determinants of leucocyte telomere length in children: a neglected and challenging field. Paediatr Perinat Epidemiol 2015; 29:146-50. [PMID: 25641522 DOI: 10.1111/ppe.12173] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
BACKGROUND Telomere length is associated with a large range of human diseases. Genome-wide association studies (GWAS) have identified genetic variants that are associated with leucocyte telomere length (LTL). However, these studies are limited to adult populations. Nevertheless, childhood is a crucial period for the determination of LTL, and the assessment of age-specific genetic determinants, although neglected, could be of great importance. Our aim was to provide insights and preliminary results on genetic determinants of LTL in children. METHODS Healthy children (n = 322, age range = 6.75-17 years) with available GWAS data (Illumina Human CNV370-Duo array) were included. The LTL was measured using multiplex quantitative real-time polymerase chain reaction. Linear regression models adjusted for age, gender, parental age at child's birth, and body mass index were used to test the associations of LTL with polymorphisms identified in adult GWAS and to perform a discovery-only GWAS. RESULTS The previously GWAS-identified variants in adults were not associated with LTL in our paediatric sample. This lack of association was not due to possible interactions with age or gene × gene interactions. Furthermore, a discovery-only GWAS approach demonstrated six novel variants that reached the level of suggestive association (P ≤ 5 × 10(-5)) and explain a high percentage of children's LTL. CONCLUSIONS The study of genetic determinants of LTL in children may identify novel variants not previously identified in adults. Studies in large-scale children populations are needed for the confirmation of these results, possibly through a childhood consortium that could better handle the methodological challenges of LTL genetic epidemiology field.
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Affiliation(s)
- Maria G Stathopoulou
- UMR INSERM U1122, Interactions Gène-Environnement en Physiopathologie Cardio-Vasculaire (IGE-PCV), Université de Lorraine, Nancy, France
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Telomeres are shorter in placentas from pregnancies with uncontrolled diabetes. Placenta 2015; 36:199-203. [DOI: 10.1016/j.placenta.2014.11.011] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2014] [Revised: 10/26/2014] [Accepted: 11/18/2014] [Indexed: 12/31/2022]
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Glei DA, Goldman N, Weinstein M, Risques RA. Shorter Ends, Faster End? Leukocyte Telomere Length and Mortality Among Older Taiwanese. J Gerontol A Biol Sci Med Sci 2014; 70:1490-8. [PMID: 25326284 DOI: 10.1093/gerona/glu191] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2014] [Accepted: 09/09/2014] [Indexed: 12/20/2022] Open
Abstract
Recent studies have found mixed results regarding the association between leukocyte telomere length (LTL)--thought to be a marker of cellular aging--and all-cause mortality. Some studies have reported a significant inverse relationship, but others have not, perhaps in part owing to insufficient power. We examine the relationship using data from a nationally representative sample of older Taiwanese (54+ in 2000), which is larger (n = 942) than most previous studies, and which includes comprehensive information on potential confounders including white blood cell distribution and inflammatory markers. Results from a Cox hazards model demonstrate a small, but significant, association between LTL and mortality that is independent of age, sex, and lifestyle factors. White blood cell distribution, especially the proportion of neutrophils, is an important predictor of LTL; however, the association between LTL and mortality changes little controlling for white blood cell distribution. In contrast, the association between LTL and mortality weakens considerably (by 48%) after adjustment for inflammatory markers and homocysteine. Our results suggest that the relationship between short telomeres and mortality is tied to inflammation and homocysteine. Longitudinal studies are needed to explore bidirectional influences resulting from the fact that inflammation leads to shorter leukocyte telomeres, which in turn results in senescence, which exacerbates inflammation.
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Affiliation(s)
- Dana A Glei
- Center for Population and Health, Georgetown University, Washington, District of Columbia.
| | - Noreen Goldman
- Office of Population Research, Princeton University, Princeton, New Jersey
| | - Maxine Weinstein
- Center for Population and Health, Georgetown University, Washington, District of Columbia
| | - Rosa Ana Risques
- Department of Pathology, University of Washington, Seattle, Washington
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Pham HH, Murphy CT, Sureshkumar G, Ly DH, Opresko PL, Armitage BA. Cooperative hybridization of γPNA miniprobes to a repeating sequence motif and application to telomere analysis. Org Biomol Chem 2014; 12:7345-7354. [PMID: 25115693 PMCID: PMC4162129 DOI: 10.1039/c4ob00953c] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
GammaPNA oligomers having one or two repeats of the sequence AATCCC were designed to hybridize to DNA having one or more repeats of the complementary TTAGGG sequence found in the human telomere. UV melting curves and surface plasmon resonance experiments demonstrate high affinity and cooperativity for hybridization of these miniprobes to DNA having multiple complementary repeats. Fluorescence spectroscopy for Cy3-labeled miniprobes demonstrate increases in fluorescence intensity for assembling multiple short probes on a DNA target compared with fewer longer probes. The fluorescent γPNA miniprobes were then used to stain telomeres in metaphase chromosomes derived from U2OS cells possessing heterogeneous long telomeres and Jurkat cells harboring homogenous short telomeres. The miniprobes yielded comparable fluorescence intensity to a commercially available PNA 18mer probe in U2OS cells, but significantly brighter fluorescence was observed for telomeres in Jurkat cells. These results suggest that γPNA miniprobes can be effective telomere-staining reagents with applications toward analysis of critically short telomeres, which have been implicated in a range of human diseases.
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Affiliation(s)
- Ha H. Pham
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213
- Center for Nucleic Acids Science and Technology, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213
| | - Connor T. Murphy
- Center for Nucleic Acids Science and Technology, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213
- Department of Environmental and Occupational Health, University of Pittsburgh, Graduate School of Public Health, Pittsburgh, PA 15219
| | - Gopalsamy Sureshkumar
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213
- Center for Nucleic Acids Science and Technology, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213
| | - Danith H. Ly
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213
- Center for Nucleic Acids Science and Technology, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213
| | - Patricia L. Opresko
- Center for Nucleic Acids Science and Technology, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213
- Department of Environmental and Occupational Health, University of Pittsburgh, Graduate School of Public Health, Pittsburgh, PA 15219
| | - Bruce A. Armitage
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213
- Center for Nucleic Acids Science and Technology, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213
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Allison DB, Antoine LH, Ballinger SW, Bamman MM, Biga P, Darley-Usmar VM, Fisher G, Gohlke JM, Halade GV, Hartman JL, Hunter GR, Messina JL, Nagy TR, Plaisance EP, Powell ML, Roth KA, Sandel MW, Schwartz TS, Smith DL, Sweatt JD, Tollefsbol TO, Watts SA, Yang Y, Zhang J, Austad SN. Aging and energetics' 'Top 40' future research opportunities 2010-2013. F1000Res 2014; 3:219. [PMID: 25324965 PMCID: PMC4197746 DOI: 10.12688/f1000research.5212.1] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/08/2014] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND As part of a coordinated effort to expand our research activity at the interface of Aging and Energetics a team of investigators at The University of Alabama at Birmingham systematically assayed and catalogued the top research priorities identified in leading publications in that domain, believing the result would be useful to the scientific community at large. OBJECTIVE To identify research priorities and opportunities in the domain of aging and energetics as advocated in the 40 most cited papers related to aging and energetics in the last 4 years. DESIGN The investigators conducted a search for papers on aging and energetics in Scopus, ranked the resulting papers by number of times they were cited, and selected the ten most-cited papers in each of the four years that include 2010 to 2013, inclusive. RESULTS Ten research categories were identified from the 40 papers. These included: (1) Calorie restriction (CR) longevity response, (2) role of mTOR (mechanistic target of Rapamycin) and related factors in lifespan extension, (3) nutrient effects beyond energy (especially resveratrol, omega-3 fatty acids, and selected amino acids), 4) autophagy and increased longevity and health, (5) aging-associated predictors of chronic disease, (6) use and effects of mesenchymal stem cells (MSCs), (7) telomeres relative to aging and energetics, (8) accretion and effects of body fat, (9) the aging heart, and (10) mitochondria, reactive oxygen species, and cellular energetics. CONCLUSION The field is rich with exciting opportunities to build upon our existing knowledge about the relations among aspects of aging and aspects of energetics and to better understand the mechanisms which connect them.
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Affiliation(s)
- David B. Allison
- Office of Energetics, University of Alabama at Birmingham, Birmingham, USA
- School of Public Health, University of Alabama at Birmingham, Birmingham, USA
- Nutrition and Obesity Research Center, University of Alabama at Birmingham, Birmingham, USA
- Comprehensive Center for Healthy Aging, University of Alabama at Birmingham, Birmingham, USA
- UAB Center for Exercise Medicine, University of Alabama at Birmingham, Birmingham, USA
| | - Lisa H. Antoine
- Office of Energetics, University of Alabama at Birmingham, Birmingham, USA
- School of Engineering, University of Alabama at Birmingham, Birmingham, USA
- Department of Environmental Health Sciences, University of Alabama at Birmingham, Birmingham, USA
| | - Scott W. Ballinger
- Department of Pathology, University of Alabama at Birmingham, Birmingham, USA
- UAB Center for Exercise Medicine, University of Alabama at Birmingham, Birmingham, USA
| | - Marcas M. Bamman
- Nutrition and Obesity Research Center, University of Alabama at Birmingham, Birmingham, USA
- Department of Cell, Developmental, & Integrative Biology, University of Alabama at Birmingham, Birmingham, USA
- UAB Center for Exercise Medicine, University of Alabama at Birmingham, Birmingham, USA
- Birmingham VA Medical Center, Birmingham, USA
| | - Peggy Biga
- Nutrition and Obesity Research Center, University of Alabama at Birmingham, Birmingham, USA
- Department of Biology, University of Alabama at Birmingham, Birmingham, USA
| | - Victor M. Darley-Usmar
- Nutrition and Obesity Research Center, University of Alabama at Birmingham, Birmingham, USA
- Department of Pathology, University of Alabama at Birmingham, Birmingham, USA
- Center for Free Radical Biology, University of Alabama at Birmingham, Birmingham, USA
| | - Gordon Fisher
- Nutrition and Obesity Research Center, University of Alabama at Birmingham, Birmingham, USA
- Department of Human Studies, University of Alabama at Birmingham, Birmingham, USA
- UAB Center for Exercise Medicine, University of Alabama at Birmingham, Birmingham, USA
| | - Julia M. Gohlke
- Nutrition and Obesity Research Center, University of Alabama at Birmingham, Birmingham, USA
- Department of Environmental Health Sciences, University of Alabama at Birmingham, Birmingham, USA
| | - Ganesh V. Halade
- Nutrition and Obesity Research Center, University of Alabama at Birmingham, Birmingham, USA
- Department of Medicine – Cardiovascular Disease, University of Alabama at Birmingham, Birmingham, USA
| | - John L. Hartman
- Nutrition and Obesity Research Center, University of Alabama at Birmingham, Birmingham, USA
- Department of Genetics, University of Alabama at Birmingham, Birmingham, USA
| | - Gary R. Hunter
- Nutrition and Obesity Research Center, University of Alabama at Birmingham, Birmingham, USA
- Department of Human Studies, University of Alabama at Birmingham, Birmingham, USA
- UAB Center for Exercise Medicine, University of Alabama at Birmingham, Birmingham, USA
| | - Joseph L. Messina
- Nutrition and Obesity Research Center, University of Alabama at Birmingham, Birmingham, USA
- Department of Pathology, University of Alabama at Birmingham, Birmingham, USA
- UAB Center for Exercise Medicine, University of Alabama at Birmingham, Birmingham, USA
- Birmingham VA Medical Center, Birmingham, USA
| | - Tim R. Nagy
- Nutrition and Obesity Research Center, University of Alabama at Birmingham, Birmingham, USA
- Department of Nutrition Sciences, University of Alabama at Birmingham, Birmingham, USA
- Comprehensive Center for Healthy Aging, University of Alabama at Birmingham, Birmingham, USA
- UAB Center for Exercise Medicine, University of Alabama at Birmingham, Birmingham, USA
| | - Eric P. Plaisance
- Nutrition and Obesity Research Center, University of Alabama at Birmingham, Birmingham, USA
- Department of Human Studies, University of Alabama at Birmingham, Birmingham, USA
- UAB Center for Exercise Medicine, University of Alabama at Birmingham, Birmingham, USA
| | - Mickie L. Powell
- Nutrition and Obesity Research Center, University of Alabama at Birmingham, Birmingham, USA
- Department of Biology, University of Alabama at Birmingham, Birmingham, USA
| | - Kevin A. Roth
- Nutrition and Obesity Research Center, University of Alabama at Birmingham, Birmingham, USA
- Department of Biology, University of Alabama at Birmingham, Birmingham, USA
| | - Michael W. Sandel
- Nutrition and Obesity Research Center, University of Alabama at Birmingham, Birmingham, USA
- Department of Biostatistics, University of Alabama at Birmingham, Birmingham, USA
| | - Tonia S. Schwartz
- School of Public Health, University of Alabama at Birmingham, Birmingham, USA
- Nutrition and Obesity Research Center, University of Alabama at Birmingham, Birmingham, USA
| | - Daniel L. Smith
- Nutrition and Obesity Research Center, University of Alabama at Birmingham, Birmingham, USA
- Comprehensive Center for Healthy Aging, University of Alabama at Birmingham, Birmingham, USA
| | - J. David Sweatt
- UAB Center for Exercise Medicine, University of Alabama at Birmingham, Birmingham, USA
| | - Trygve O. Tollefsbol
- Nutrition and Obesity Research Center, University of Alabama at Birmingham, Birmingham, USA
- Department of Biology, University of Alabama at Birmingham, Birmingham, USA
| | - Stephen A. Watts
- Nutrition and Obesity Research Center, University of Alabama at Birmingham, Birmingham, USA
- Department of Biology, University of Alabama at Birmingham, Birmingham, USA
| | - Yongbin Yang
- Nutrition and Obesity Research Center, University of Alabama at Birmingham, Birmingham, USA
- Department of Nutrition Sciences, University of Alabama at Birmingham, Birmingham, USA
| | - Jianhua Zhang
- Center for Free Radical Biology, University of Alabama at Birmingham, Birmingham, USA
| | - Steven N. Austad
- Nutrition and Obesity Research Center, University of Alabama at Birmingham, Birmingham, USA
- Department of Biology, University of Alabama at Birmingham, Birmingham, USA
- Comprehensive Center for Healthy Aging, University of Alabama at Birmingham, Birmingham, USA
- UAB Center for Exercise Medicine, University of Alabama at Birmingham, Birmingham, USA
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Neighborhood characteristics and leukocyte telomere length: the Multi-Ethnic Study of Atherosclerosis. Health Place 2014; 28:167-72. [PMID: 24859373 DOI: 10.1016/j.healthplace.2014.04.009] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2013] [Revised: 04/01/2014] [Accepted: 04/26/2014] [Indexed: 11/23/2022]
Abstract
Telomeres are the protective caps at the ends of eukaryotic chromosomes. Telomeres get shorter each time a cell divides, and critically shortened telomeres trigger cellular senescence. Thus, telomere length is hypothesized to be a biological marker of aging. The purpose of this study was to examine the association between neighborhood characteristics and leukocyte telomere length. Using data from a subsample (n=978) of the Multi-Ethnic Study of Atherosclerosis, a population-based study of women and men aged 45-84, we found that neighborhood social environment (but not neighborhood socioeconomic disadvantage) was associated with telomere length. Respondents who lived in neighborhoods characterized by lower aesthetic quality, safety, and social cohesion had shorter telomeres than those who lived in neighborhoods with a more salutary social environment, even after adjusting for individual-level socioeconomic status and biomedical and lifestyle factors related to telomere length. Telomere length may be one biological mechanism by which neighborhood characteristics influence an individual׳s risk of disease and death.
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Abstract
Telomere length is considered to be a risk factor in adults due to its proved association with cancer incidence and mortality. Since newborn present a wide interindividual variation in mean telomere length, it is relevant to demonstrate if these differences in length can act also as an early risk indicator. To answer this question, we have measured the mean telomere length of 74 samples of cord blood from newborns and studied its association with the basal genetic damage, measured as the frequency of binucleated cells carrying micronuclei. In addition, we have challenged the cells of a subgroup of individuals (N = 35) against mitomycin-C (MMC) to establish their sensitivity to induced genomic instability. Results indicate that newborn with shorter telomeres present significantly higher levels of genetic damage when compared to those with longer telomeres. In addition, the cellular response to MMC was also significantly higher among those samples from subjects with shorter telomeres. Independently of the causal mechanisms involved, our results show for the first time that telomere length at delivery influence both the basal and induced genetic damage of the individual. Impact Individuals born with shorter telomeres may be at increased risk, especially for those biological processes triggered by genomic instability as is the case of cancer and other age-related diseases.
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García-Calzón S, Moleres A, Marcos A, Campoy C, Moreno LA, Azcona-Sanjulián MC, Martínez-González MA, Martínez JA, Zalba G, Marti A. Telomere length as a biomarker for adiposity changes after a multidisciplinary intervention in overweight/obese adolescents: the EVASYON study. PLoS One 2014; 9:e89828. [PMID: 24587065 PMCID: PMC3933678 DOI: 10.1371/journal.pone.0089828] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Accepted: 01/27/2014] [Indexed: 01/17/2023] Open
Abstract
CONTEXT Telomeres are biomarkers of biological aging. Shorter telomeres have been associated with increased adiposity in adults. However, this relationship remains unclear in children and adolescents. OBJECTIVE To evaluate the association between telomere length (TL) and adiposity markers in overweight/obese adolescents after an intensive program. We hypothesize that greater TL at baseline would predict a better response to a weight loss treatment. DESIGN SETTING PATIENTS AND INTERVENTION The EVASYON is a multidisciplinary treatment program for adolescents with overweight and obesity that is aimed at applying the intervention to all possibly involved areas of the individual, such as dietary habits, physical activity and cognitive and psychological profiles. Seventy-four participants (36 males, 38 females, 12-16 yr) were enrolled in the intervention program: 2 months of an energy-restricted diet and a follow-up period (6 months). MAIN OUTCOME TL was measured by quantitative real-time polymerase chain reaction at baseline and after 2 months; meanwhile, anthropometric variables were also assessed after 6 months of follow-up. RESULTS TL lengthened in participants during the intensive period (+1.9±1.0, p<0.001) being greater in overweight/obese adolescents with the shortest telomeres at baseline (r = -0.962, p<0.001). Multivariable linear regression analysis showed that higher baseline TL significantly predicted a higher decrease in body weight (B = -1.53, p = 0.005; B = -2.25, p = 0.047) and in standard deviation score for body mass index (BMI-SDS) (B = -0.22, p = 0.010; B = -0.47, p = 0.005) after the intensive and extensive period treatment respectively, in boys. CONCLUSION Our study shows that a weight loss intervention is accompanied by a significant increase in TL in overweight/obese adolescents. Moreover, we suggest that initial longer TL could be a potential predictor for a better weight loss response.
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Affiliation(s)
- Sonia García-Calzón
- Department of Nutrition, Food Science and Physiology, University of Navarra, Pamplona, Spain
| | - Adriana Moleres
- Department of Nutrition, Food Science and Physiology, University of Navarra, Pamplona, Spain
| | - Ascensión Marcos
- Immunonutrition Research Group, Department of Metabolism and Nutrition, Institute of Food Science, Technology, and Nutrition, Instituto del Frío, Spanish National Research Council, Madrid, Spain
| | - Cristina Campoy
- Pediatric Department, Medicine School, Universidad de Granada, Granada, Spain
| | - Luis A. Moreno
- GENUD (Growth, Exercise, Nutrition and Development) Research Group, Facultad de Ciencias de la Salud, University of Zaragoza, Zaragoza, Spain
| | | | - Miguel A. Martínez-González
- Department of Preventive Medicine and Public Health, University of Navarra, Pamplona, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Instituto de Salud Carlos III, Madrid, Spain
| | - J. Alfredo Martínez
- Department of Nutrition, Food Science and Physiology, University of Navarra, Pamplona, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Instituto de Salud Carlos III, Madrid, Spain
| | - Guillermo Zalba
- Department of Biochemistry and Genetics, University of Navarra, Pamplona, Spain
| | - Amelia Marti
- Department of Nutrition, Food Science and Physiology, University of Navarra, Pamplona, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Instituto de Salud Carlos III, Madrid, Spain
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Deelen J, Beekman M, Codd V, Trompet S, Broer L, Hägg S, Fischer K, Thijssen PE, Suchiman HED, Postmus I, Uitterlinden AG, Hofman A, de Craen AJM, Metspalu A, Pedersen NL, van Duijn CM, Jukema JW, Houwing-Duistermaat JJ, Samani NJ, Slagboom PE. Leukocyte telomere length associates with prospective mortality independent of immune-related parameters and known genetic markers. Int J Epidemiol 2014; 43:878-86. [PMID: 24425829 PMCID: PMC4052133 DOI: 10.1093/ije/dyt267] [Citation(s) in RCA: 87] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Background: Human leukocyte telomere length (LTL) decreases with age and shorter LTL has previously been associated with increased prospective mortality. However, it is not clear whether LTL merely marks the health status of an individual by its association with parameters of immune function, for example, or whether telomere shortening also contributes causally to lifespan variation in humans. Methods: We measured LTL in 870 nonagenarian siblings (mean age 93 years), 1580 of their offspring and 725 spouses thereof (mean age 59 years) from the Leiden Longevity Study (LLS). Results: We found that shorter LTL is associated with increased prospective mortality in middle (30–80 years; hazard ratio (HR) = 0.75, P = 0.001) and highly advanced age (≥90 years; HR = 0.92, P = 0.028), and show that this association cannot be explained by the association of LTL with the immune-related markers insulin-like growth factor 1 to insulin-like growth factor binding protein 3 molar ratio, C-reactive protein, interleukin 6, cytomegalovirus serostatus or white blood cell counts. We found no difference in LTL between the middle-aged LLS offspring and their spouses (β = 0.006, P = 0.932). Neither did we observe an association of LTL-associated genetic variants with mortality in a prospective meta-analysis of multiple cohorts (n = 8165). Conclusions: We confirm LTL to be a marker of prospective mortality in middle and highly advanced age and additionally show that this association could not be explained by the association of LTL with various immune-related markers. Furthermore, the approaches performed here do not further support the hypothesis that LTL variation contributes to the genetic propensity for longevity.
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Affiliation(s)
- Joris Deelen
- Department of Molecular Epidemiology, Leiden University Medical Center, Leiden, The Netherlands, Netherlands Consortium for Healthy Ageing, Leiden University Medical Center, Leiden, The Netherlands, Department of Cardiovascular Sciences, University of Leicester, Leicester, UK, Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands, Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands, Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands, Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden, Estonian Genome Center, University of Tartu, Tartu, Estonia, Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands and Department of Medical Statistics, Leiden University Medical Center, Leiden, The NetherlandsDepartment of Molecular Epidemiology, Leiden University Medical Center, Leiden, The Netherlands, Netherlands Consortium for Healthy Ageing, Leiden University Medical Center, Leiden, The Netherlands, Department of Cardiovascular Sciences, University of Leicester, Leicester, UK, Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands, Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands, Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands, Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden, Estonian Genome Center, University of Tartu, Tartu, Estonia, Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands and Department of Medical Statistics, Leiden University Medical Center, Leiden, The Netherlands
| | - Marian Beekman
- Department of Molecular Epidemiology, Leiden University Medical Center, Leiden, The Netherlands, Netherlands Consortium for Healthy Ageing, Leiden University Medical Center, Leiden, The Netherlands, Department of Cardiovascular Sciences, University of Leicester, Leicester, UK, Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands, Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands, Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands, Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden, Estonian Genome Center, University of Tartu, Tartu, Estonia, Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands and Department of Medical Statistics, Leiden University Medical Center, Leiden, The NetherlandsDepartment of Molecular Epidemiology, Leiden University Medical Center, Leiden, The Netherlands, Netherlands Consortium for Healthy Ageing, Leiden University Medical Center, Leiden, The Netherlands, Department of Cardiovascular Sciences, University of Leicester, Leicester, UK, Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands, Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands, Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands, Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden, Estonian Genome Center, University of Tartu, Tartu, Estonia, Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands and Department of Medical Statistics, Leiden University Medical Center, Leiden, The Netherlands
| | - Veryan Codd
- Department of Molecular Epidemiology, Leiden University Medical Center, Leiden, The Netherlands, Netherlands Consortium for Healthy Ageing, Leiden University Medical Center, Leiden, The Netherlands, Department of Cardiovascular Sciences, University of Leicester, Leicester, UK, Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands, Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands, Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands, Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden, Estonian Genome Center, University of Tartu, Tartu, Estonia, Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands and Department of Medical Statistics, Leiden University Medical Center, Leiden, The Netherlands
| | - Stella Trompet
- Department of Molecular Epidemiology, Leiden University Medical Center, Leiden, The Netherlands, Netherlands Consortium for Healthy Ageing, Leiden University Medical Center, Leiden, The Netherlands, Department of Cardiovascular Sciences, University of Leicester, Leicester, UK, Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands, Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands, Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands, Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden, Estonian Genome Center, University of Tartu, Tartu, Estonia, Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands and Department of Medical Statistics, Leiden University Medical Center, Leiden, The NetherlandsDepartment of Molecular Epidemiology, Leiden University Medical Center, Leiden, The Netherlands, Netherlands Consortium for Healthy Ageing, Leiden University Medical Center, Leiden, The Netherlands, Department of Cardiovascular Sciences, University of Leicester, Leicester, UK, Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands, Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands, Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands, Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden, Estonian Genome Center, University of Tartu, Tartu, Estonia, Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands and Department of Medical Statistics, Leiden University Medical Center, Leiden, The NetherlandsDepartment of Molecular Epidemiology, Leiden University Medica
| | - Linda Broer
- Department of Molecular Epidemiology, Leiden University Medical Center, Leiden, The Netherlands, Netherlands Consortium for Healthy Ageing, Leiden University Medical Center, Leiden, The Netherlands, Department of Cardiovascular Sciences, University of Leicester, Leicester, UK, Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands, Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands, Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands, Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden, Estonian Genome Center, University of Tartu, Tartu, Estonia, Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands and Department of Medical Statistics, Leiden University Medical Center, Leiden, The NetherlandsDepartment of Molecular Epidemiology, Leiden University Medical Center, Leiden, The Netherlands, Netherlands Consortium for Healthy Ageing, Leiden University Medical Center, Leiden, The Netherlands, Department of Cardiovascular Sciences, University of Leicester, Leicester, UK, Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands, Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands, Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands, Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden, Estonian Genome Center, University of Tartu, Tartu, Estonia, Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands and Department of Medical Statistics, Leiden University Medical Center, Leiden, The Netherlands
| | - Sara Hägg
- Department of Molecular Epidemiology, Leiden University Medical Center, Leiden, The Netherlands, Netherlands Consortium for Healthy Ageing, Leiden University Medical Center, Leiden, The Netherlands, Department of Cardiovascular Sciences, University of Leicester, Leicester, UK, Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands, Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands, Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands, Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden, Estonian Genome Center, University of Tartu, Tartu, Estonia, Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands and Department of Medical Statistics, Leiden University Medical Center, Leiden, The Netherlands
| | - Krista Fischer
- Department of Molecular Epidemiology, Leiden University Medical Center, Leiden, The Netherlands, Netherlands Consortium for Healthy Ageing, Leiden University Medical Center, Leiden, The Netherlands, Department of Cardiovascular Sciences, University of Leicester, Leicester, UK, Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands, Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands, Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands, Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden, Estonian Genome Center, University of Tartu, Tartu, Estonia, Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands and Department of Medical Statistics, Leiden University Medical Center, Leiden, The Netherlands
| | - Peter E Thijssen
- Department of Molecular Epidemiology, Leiden University Medical Center, Leiden, The Netherlands, Netherlands Consortium for Healthy Ageing, Leiden University Medical Center, Leiden, The Netherlands, Department of Cardiovascular Sciences, University of Leicester, Leicester, UK, Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands, Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands, Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands, Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden, Estonian Genome Center, University of Tartu, Tartu, Estonia, Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands and Department of Medical Statistics, Leiden University Medical Center, Leiden, The NetherlandsDepartment of Molecular Epidemiology, Leiden University Medical Center, Leiden, The Netherlands, Netherlands Consortium for Healthy Ageing, Leiden University Medical Center, Leiden, The Netherlands, Department of Cardiovascular Sciences, University of Leicester, Leicester, UK, Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands, Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands, Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands, Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden, Estonian Genome Center, University of Tartu, Tartu, Estonia, Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands and Department of Medical Statistics, Leiden University Medical Center, Leiden, The Netherlands
| | - H Eka D Suchiman
- Department of Molecular Epidemiology, Leiden University Medical Center, Leiden, The Netherlands, Netherlands Consortium for Healthy Ageing, Leiden University Medical Center, Leiden, The Netherlands, Department of Cardiovascular Sciences, University of Leicester, Leicester, UK, Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands, Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands, Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands, Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden, Estonian Genome Center, University of Tartu, Tartu, Estonia, Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands and Department of Medical Statistics, Leiden University Medical Center, Leiden, The Netherlands
| | - Iris Postmus
- Department of Molecular Epidemiology, Leiden University Medical Center, Leiden, The Netherlands, Netherlands Consortium for Healthy Ageing, Leiden University Medical Center, Leiden, The Netherlands, Department of Cardiovascular Sciences, University of Leicester, Leicester, UK, Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands, Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands, Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands, Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden, Estonian Genome Center, University of Tartu, Tartu, Estonia, Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands and Department of Medical Statistics, Leiden University Medical Center, Leiden, The NetherlandsDepartment of Molecular Epidemiology, Leiden University Medical Center, Leiden, The Netherlands, Netherlands Consortium for Healthy Ageing, Leiden University Medical Center, Leiden, The Netherlands, Department of Cardiovascular Sciences, University of Leicester, Leicester, UK, Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands, Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands, Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands, Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden, Estonian Genome Center, University of Tartu, Tartu, Estonia, Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands and Department of Medical Statistics, Leiden University Medical Center, Leiden, The Netherlands
| | - André G Uitterlinden
- Department of Molecular Epidemiology, Leiden University Medical Center, Leiden, The Netherlands, Netherlands Consortium for Healthy Ageing, Leiden University Medical Center, Leiden, The Netherlands, Department of Cardiovascular Sciences, University of Leicester, Leicester, UK, Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands, Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands, Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands, Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden, Estonian Genome Center, University of Tartu, Tartu, Estonia, Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands and Department of Medical Statistics, Leiden University Medical Center, Leiden, The NetherlandsDepartment of Molecular Epidemiology, Leiden University Medical Center, Leiden, The Netherlands, Netherlands Consortium for Healthy Ageing, Leiden University Medical Center, Leiden, The Netherlands, Department of Cardiovascular Sciences, University of Leicester, Leicester, UK, Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands, Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands, Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands, Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden, Estonian Genome Center, University of Tartu, Tartu, Estonia, Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands and Department of Medical Statistics, Leiden University Medical Center, Leiden, The NetherlandsDepartment of Molecular Epidemiology, Leiden University Medica
| | - Albert Hofman
- Department of Molecular Epidemiology, Leiden University Medical Center, Leiden, The Netherlands, Netherlands Consortium for Healthy Ageing, Leiden University Medical Center, Leiden, The Netherlands, Department of Cardiovascular Sciences, University of Leicester, Leicester, UK, Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands, Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands, Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands, Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden, Estonian Genome Center, University of Tartu, Tartu, Estonia, Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands and Department of Medical Statistics, Leiden University Medical Center, Leiden, The Netherlands
| | - Anton J M de Craen
- Department of Molecular Epidemiology, Leiden University Medical Center, Leiden, The Netherlands, Netherlands Consortium for Healthy Ageing, Leiden University Medical Center, Leiden, The Netherlands, Department of Cardiovascular Sciences, University of Leicester, Leicester, UK, Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands, Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands, Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands, Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden, Estonian Genome Center, University of Tartu, Tartu, Estonia, Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands and Department of Medical Statistics, Leiden University Medical Center, Leiden, The Netherlands
| | - Andres Metspalu
- Department of Molecular Epidemiology, Leiden University Medical Center, Leiden, The Netherlands, Netherlands Consortium for Healthy Ageing, Leiden University Medical Center, Leiden, The Netherlands, Department of Cardiovascular Sciences, University of Leicester, Leicester, UK, Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands, Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands, Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands, Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden, Estonian Genome Center, University of Tartu, Tartu, Estonia, Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands and Department of Medical Statistics, Leiden University Medical Center, Leiden, The Netherlands
| | - Nancy L Pedersen
- Department of Molecular Epidemiology, Leiden University Medical Center, Leiden, The Netherlands, Netherlands Consortium for Healthy Ageing, Leiden University Medical Center, Leiden, The Netherlands, Department of Cardiovascular Sciences, University of Leicester, Leicester, UK, Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands, Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands, Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands, Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden, Estonian Genome Center, University of Tartu, Tartu, Estonia, Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands and Department of Medical Statistics, Leiden University Medical Center, Leiden, The Netherlands
| | - Cornelia M van Duijn
- Department of Molecular Epidemiology, Leiden University Medical Center, Leiden, The Netherlands, Netherlands Consortium for Healthy Ageing, Leiden University Medical Center, Leiden, The Netherlands, Department of Cardiovascular Sciences, University of Leicester, Leicester, UK, Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands, Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands, Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands, Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden, Estonian Genome Center, University of Tartu, Tartu, Estonia, Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands and Department of Medical Statistics, Leiden University Medical Center, Leiden, The NetherlandsDepartment of Molecular Epidemiology, Leiden University Medical Center, Leiden, The Netherlands, Netherlands Consortium for Healthy Ageing, Leiden University Medical Center, Leiden, The Netherlands, Department of Cardiovascular Sciences, University of Leicester, Leicester, UK, Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands, Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands, Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands, Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden, Estonian Genome Center, University of Tartu, Tartu, Estonia, Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands and Department of Medical Statistics, Leiden University Medical Center, Leiden, The Netherlands
| | - J Wouter Jukema
- Department of Molecular Epidemiology, Leiden University Medical Center, Leiden, The Netherlands, Netherlands Consortium for Healthy Ageing, Leiden University Medical Center, Leiden, The Netherlands, Department of Cardiovascular Sciences, University of Leicester, Leicester, UK, Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands, Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands, Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands, Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden, Estonian Genome Center, University of Tartu, Tartu, Estonia, Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands and Department of Medical Statistics, Leiden University Medical Center, Leiden, The NetherlandsDepartment of Molecular Epidemiology, Leiden University Medical Center, Leiden, The Netherlands, Netherlands Consortium for Healthy Ageing, Leiden University Medical Center, Leiden, The Netherlands, Department of Cardiovascular Sciences, University of Leicester, Leicester, UK, Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands, Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands, Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands, Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden, Estonian Genome Center, University of Tartu, Tartu, Estonia, Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands and Department of Medical Statistics, Leiden University Medical Center, Leiden, The Netherlands
| | - Jeanine J Houwing-Duistermaat
- Department of Molecular Epidemiology, Leiden University Medical Center, Leiden, The Netherlands, Netherlands Consortium for Healthy Ageing, Leiden University Medical Center, Leiden, The Netherlands, Department of Cardiovascular Sciences, University of Leicester, Leicester, UK, Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands, Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands, Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands, Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden, Estonian Genome Center, University of Tartu, Tartu, Estonia, Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands and Department of Medical Statistics, Leiden University Medical Center, Leiden, The Netherlands
| | - Nilesh J Samani
- Department of Molecular Epidemiology, Leiden University Medical Center, Leiden, The Netherlands, Netherlands Consortium for Healthy Ageing, Leiden University Medical Center, Leiden, The Netherlands, Department of Cardiovascular Sciences, University of Leicester, Leicester, UK, Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands, Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands, Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands, Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden, Estonian Genome Center, University of Tartu, Tartu, Estonia, Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands and Department of Medical Statistics, Leiden University Medical Center, Leiden, The Netherlands
| | - P Eline Slagboom
- Department of Molecular Epidemiology, Leiden University Medical Center, Leiden, The Netherlands, Netherlands Consortium for Healthy Ageing, Leiden University Medical Center, Leiden, The Netherlands, Department of Cardiovascular Sciences, University of Leicester, Leicester, UK, Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands, Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands, Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands, Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden, Estonian Genome Center, University of Tartu, Tartu, Estonia, Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands and Department of Medical Statistics, Leiden University Medical Center, Leiden, The NetherlandsDepartment of Molecular Epidemiology, Leiden University Medical Center, Leiden, The Netherlands, Netherlands Consortium for Healthy Ageing, Leiden University Medical Center, Leiden, The Netherlands, Department of Cardiovascular Sciences, University of Leicester, Leicester, UK, Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands, Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands, Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands, Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden, Estonian Genome Center, University of Tartu, Tartu, Estonia, Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands and Department of Medical Statistics, Leiden University Medical Center, Leiden, The Netherlands
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Abstract
OBJECTIVES Little is known about the impact of HIV infection on biological ageing in sub-Saharan Africa. The study aimed to assess biological ageing in South African HIV-infected adults and HIV-seronegative individuals using two validated biomarkers, telomere length and CDKN2A expression (a mediator of cellular senescence). DESIGN A case-control study. METHODS Two hundred and thirty-six HIV-infected adults aged at least 30 years and 250 age and sex frequency matched HIV-seronegative individuals were recruited from clinics in township communities in Cape Town. Biological ageing was evaluated by measurement of telomere length and CDKN2A expression in peripheral blood leukocytes. RESULTS The median ages of the HIV-infected and HIV-seronegative participants were 39 and 40 years, respectively. Among HIV-infected participants, 87.1% were receiving antiretroviral therapy (ART), their median CD4⁺ cell count was 468 cells/μl and 84.3% had undetectable viral load. Both biomarkers were validated against chronological age in HIV-seronegative individuals. Telomere length was significantly shorter in HIV-infected individuals than in HIV-seronegative individuals (mean relative T/S ratio ±SE:0.91 ± 0.007 vs. 1.07 ± 0.008, P < 0.0001). CD2NKA expression was higher in HIV-infected participants than in HIV-seronegative individuals (mean expression: 0.45 ± 0.02 vs. 0.36 ± 0.03, P = 0.003). Socioeconomic factors were not associated with biological ageing in HIV-infected participants. However, in participants on ART with undetectable viral load, biomarker levels indicated greater biological ageing in those with lower current CD4⁺ cell counts. CONCLUSION Telomere length and CDKN2A expression were both consistent with increased biological ageing in HIV-infected individuals. Prospective studies of the impact of HIV on biological ageing in sub-Saharan Africa are warranted.
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