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Huang Y, Li H, Liang R, Chen J, Tang Q. The influence of sex-specific factors on biological transformations and health outcomes in aging processes. Biogerontology 2024:10.1007/s10522-024-10121-x. [PMID: 39001953 DOI: 10.1007/s10522-024-10121-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2024] [Accepted: 07/09/2024] [Indexed: 07/15/2024]
Abstract
The aging process demonstrates notable differences between males and females, which are key factors in disease susceptibility and lifespan. The differences in sex chromosomes are fundamental to the presence of sex bias in organisms. Moreover, sex-specific epigenetic modifications and changes in sex hormone levels impact the development of immunity differently during embryonic development and beyond. Mitochondria, telomeres, homeodynamic space, and intestinal flora are intricately connected to sex differences in aging. These elements can have diverse effects on men and women, resulting in unique biological transformations and health outcomes as they grow older. This review explores how sex interacts with these elements and shapes the aging process.
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Affiliation(s)
- Yongyin Huang
- Heilongjiang University of Chinese Medicine, Harbin, 150040, Heilongjiang, China
| | - Hongyu Li
- Heilongjiang University of Chinese Medicine, Harbin, 150040, Heilongjiang, China
| | - Runyu Liang
- Heilongjiang University of Chinese Medicine, Harbin, 150040, Heilongjiang, China
| | - Jia Chen
- Heilongjiang University of Chinese Medicine, Harbin, 150040, Heilongjiang, China
| | - Qiang Tang
- Heilongjiang University of Chinese Medicine, Harbin, 150040, Heilongjiang, China.
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2
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Chen Y, Ding X, Aierken A, Chen Y, Li Y. Related risk factors for age-dependent telomere shortening change with age from the perspective of life course. Arch Gerontol Geriatr 2024; 121:105349. [PMID: 38340585 DOI: 10.1016/j.archger.2024.105349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 01/14/2024] [Accepted: 01/23/2024] [Indexed: 02/12/2024]
Abstract
BACKGROUND Many related factors can accelerate the age-dependent telomere shortening, but some problems remain unresolved. This study aimed to assess the risk factors of telomere attrition at different age stages. METHODS This study was a population-based nationally representative survey study. All data were collected using a standard methodology by the national surveillance system. Quantitative polymerase chain reaction was used to measure relative leukocyte telomere length. Multiple linear regression analysis with age stratification was used to estimate the association of shortened telomere length with risk factors at the different age stages. Covariance analysis was used to compare the telomere length of category variables, and the model was adjusted for potentially confounders. RESULTS A total of 7,659 eligible participants aged 20 years or older with DNA specimens participated in the study. Related risk factors for age-dependent telomere shortening included gender, race-ethnicity, education levels, family income, health insurance, marital status, physical activity, smoking status, alcohol use, and self-reported greatest weight, which were associated with change in telomere length at different age stages. CONCLUSIONS AND IMPLICATIONS Related risk factors of telomere attrition were changed with age in life course. The evaluation of related risk factors for telomere attrition in terms of age may be a more accurate evaluation comparison with the specific age.
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Affiliation(s)
- Yin Chen
- Department of Social Medicine, School of Public Health, Zhejiang University, China
| | - XiWen Ding
- Department of Social Medicine, School of Public Health, Zhejiang University, China
| | - Ayizuhere Aierken
- Department of Social Medicine, School of Public Health, Zhejiang University, China
| | - Yuan Chen
- Department of Social Medicine, School of Public Health, Zhejiang University, China; Zhejiang Provincial People's Hospital, China
| | - Ying Li
- Department of Social Medicine, School of Public Health, Zhejiang University, China; School of medicine, Zhejiang University, China.
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3
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Yu HJ, Ho M, Chau PH, Geng L, Fong DYT. Salivary telomere length and the risks of prediabetes and diabetes among middle-aged and older adults: findings from the Health and Retirement Study. Acta Diabetol 2023; 60:273-283. [PMID: 36371747 DOI: 10.1007/s00592-022-02004-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Accepted: 11/03/2022] [Indexed: 11/14/2022]
Abstract
AIM To assess the association of telomere length (TL) with prediabetes/diabetes and to explore the potential factors affecting TL among individuals with prediabetes/diabetes by weight status. METHODS This study included 3,379 eligible adults (aged 45-85 years, males: 42%) from the US Health and Retirement Study in 2008. TL was assayed using quantitative PCR of saliva (T/S ratio). Linear and nonlinear associations between TL and prediabetes/diabetes were assessed using the logistic regression and restricted cubic spline model, respectively, adjusting for TL-plate numbers, age, sex, race, body mass index, lifestyles, diabetes medications, and cardiometabolic parameters (blood pressure, C-reactive protein, and total cholesterol). Multiple linear regression was used for testing any factors associated with TL. RESULTS Among 3,379 participants, 868 (25.7%) had prediabetes with a mean TL of 1.34 ± 0.37 (T/S ratio) and 858 (25.4%) had diabetes with a mean TL of 1.36 ± 0.43 (T/S ratio). Neither linear nor nonlinear association of TL with prediabetes/diabetes was significant by weight status. Age was negatively associated with TL in both normal-weight (β = - 0.002, p = 0.025) and overweight/obese (β = - 0.002, p = 0.006) prediabetes, but non-significant in normal-weight and overweight/obese diabetes. BMI and cardiometabolic parameters were not associated with TL in prediabetes/diabetes by weight status. CONCLUSIONS Salivary TL was not associated with prediabetes/diabetes among the US middle-aged and older adults. Further longitudinal studies are required to establish the link between TL and diabetes development and to identify potential factors affecting TL shortening, particularly in normal-weight diabetic patients.
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Affiliation(s)
- Hong-Jie Yu
- School of Nursing, The University of Hong Kong, 3 Sassoon Road, Pokfulam, Hong Kong SAR, China
| | - Mandy Ho
- School of Nursing, The University of Hong Kong, 3 Sassoon Road, Pokfulam, Hong Kong SAR, China.
| | - Pui Hing Chau
- School of Nursing, The University of Hong Kong, 3 Sassoon Road, Pokfulam, Hong Kong SAR, China
| | - Leiluo Geng
- State Key Laboratory of Pharmaceutical Biotechnology, The University of Hong Kong, Hong Kong SAR, China
- Department of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Daniel Yee Tak Fong
- School of Nursing, The University of Hong Kong, 3 Sassoon Road, Pokfulam, Hong Kong SAR, China
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Carroll JE, Price JE, Brown J, Bamishigbin O, Shalowitz MU, Ramey S, Dunkel Schetter C. Lifetime discrimination in low to middle income mothers and cellular aging: A prospective analysis. Soc Sci Med 2022; 311:115356. [PMID: 36122526 PMCID: PMC10024938 DOI: 10.1016/j.socscimed.2022.115356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Revised: 08/15/2022] [Accepted: 09/03/2022] [Indexed: 11/25/2022]
Abstract
BACKGROUND Experiences of discrimination on the basis of race, ethnicity, and other characteristics are associated with adverse health outcomes, including elevated rates of morbidity in later life and earlier mortality. Acceleration of biological aging is a plausible pathway linking discrimination to disease risk. The objective of this study was to examine the relationship of self-reported lifetime and everyday discrimination to women's telomere length several years after birth of a child in a longitudinal cohort study. METHODS The Community Child Health Network (CCHN) conducted a community-based participatory research project focused on racial, ethnic, and socioeconomic disparities in maternal and child health. Data for the current substudy are from a longitudinal cohort study in 3 of the 5 project sites. This multi-site community-based longitudinal study was conducted in Lake County, IL north of Chicago, Washington, D.C., and rural North Carolina. Participants were low to middle-income mothers (N = 103) with a primary identity of Hispanic/Latina, Black, or non-Hispanic White who rated their experience of everyday and lifetime discrimination during an at-home interview one-month postpartum. Buccal samples were collected to assay buccal cell telomere length several years later when a consecutive child was 3-5 years of age. Telomere length derived from buccal cells was used as a biomarker indicating cellular aging and a risk factor for age-related disease. RESULTS Mothers (18-39 years old) who reported higher lifetime discrimination had shorter telomere length an average of 5.6 years later (B = -0.22 [SE = 0.04], p < 0.001). Mother's reports of everyday discrimination were not significantly related to telomere length (0.01[0.01], p = 0.15). CONCLUSIONS These findings suggest that lifetime exposure to discrimination, but not necessarily current reports of everyday discrimination, may increase biological aging as indicated by shorter buccal cell telomere length, providing evidence of a plausible route through which discrimination contributes to increased risk for earlier onset aging and age-related disease in women.
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Affiliation(s)
- Judith E Carroll
- University of California, Los Angeles, Cousins Center for Psychoneuroimmunology, Department of Psychiatry & Biobehavioral Science, David Geffen School of Medicine, Jane & Terry Semel Institute for Neuroscience & Human Behavior, United States.
| | - Jonah Eliezer Price
- University of California, Los Angeles, Department of Psychology, United States
| | - Joni Brown
- University of California, Los Angeles, Department of Psychology, United States
| | | | - Madeleine U Shalowitz
- NorthShore University HealthSystem, Department of Pediatrics, Rush University, Department of Psychiatry, United States
| | - Sharon Ramey
- Virginia Tech, Fralin Biomedical Research Institute, Departments of Psychology, Neuroscience, and Human Development, Department of Psychiatry & Behavioral Medicine and Pediatrics, United States
| | - Christine Dunkel Schetter
- University of California, Los Angeles, Cousins Center for Psychoneuroimmunology, Department of Psychiatry & Biobehavioral Science, David Geffen School of Medicine, Jane & Terry Semel Institute for Neuroscience & Human Behavior, United States; University of California, Los Angeles, Department of Psychology, United States
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5
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Cancer-related accelerated ageing and biobehavioural modifiers: a framework for research and clinical care. Nat Rev Clin Oncol 2022; 19:173-187. [PMID: 34873313 PMCID: PMC9974153 DOI: 10.1038/s41571-021-00580-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/03/2021] [Indexed: 12/15/2022]
Abstract
A growing body of evidence indicates that patients with cancer who receive cytotoxic treatments (such as chemotherapy or radiotherapy) have an increased risk of accelerated physical and cognitive ageing. Furthermore, accelerated biological ageing is a suspected driving force behind many of these observed effects. In this Review, we describe the mechanisms of biological ageing and how they apply to patients with cancer. We highlight the important role of specific behavioural factors, namely stress, sleep and lifestyle-related factors such as physical activity, weight management, diet and substance use, in the accelerated ageing of patients with cancer and cancer survivors. We also present a framework of how modifiable behaviours could operate to either increase the risk of accelerated ageing, provide protection, or promote resilience at both the biological level and in terms of patient-reported outcomes.
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Semeraro MD, Almer G, Renner W, Gruber HJ, Herrmann M. Telomere length in leucocytes and solid tissues of young and aged rats. Aging (Albany NY) 2022; 14:1713-1728. [PMID: 35220278 PMCID: PMC8908913 DOI: 10.18632/aging.203922] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2021] [Accepted: 02/22/2022] [Indexed: 11/25/2022]
Abstract
Background: Telomeres are protective nucleoprotein structures at the end of chromosomes that shorten with age. Telomere length (TL) in peripheral blood mononuclear cells (PBMCs) has been proposed as surrogate marker for TL in the entire organism. Solid evidence that supports this concept is lacking. Methods: Relative TL (RTL) was measured in PBMCS and multiple solid tissues from 24 young (4 months) and 24 aged (14 months) Sprague-Dawley (SD) rats. The mRNA expression of telomerase (TERT) and shelterin proteins TERF-1 and TERF-2 was also measured. Results: Mean RTL in PBMCs and solid tissues of young rats ranged from 0.64 ± 0.26 in large intestine to 1.07 ± 0.22 in skeletal muscle. RTL in PBMCs correlated with that in kidney (r = 0.315, p = 0.008), skeletal muscle (r = 0.276, p = 0.022), liver (r = 0.269, p = 0.033), large intestine (r = −0.463, p = 7.035E-5) and aorta (r = −0.273, p = 0.028). A significant difference of RTL between young and aged animals was only observed in aorta (0.98 ± 0.15 vs. 0.76 ± 0.11, p = 1.987E-6), lung (0.76 ± 0.14 vs. 0.85 ± 0.14, p = 0.024) and visceral fat (0.83 ± 0.14 vs. 0.92 ± 0.15, p = 0.44). The expression of TERT significantly differed between the tested organs with highest levels in liver and kidney. Age-related differences in TERT expression were found in PBMCs, skeletal muscle, and visceral fat. mRNA expression of TERF-1 and TERF-2 was tissue-specific with the highest levels in liver. Age-related differences in TERF-1 and TERF-2 expression were inconsistent. Conclusions: The present study questions the utility of RTL in PBMCs as a biomarker for the individual assessment of aging.
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Affiliation(s)
- M Donatella Semeraro
- Clinical Institute of Medical and Chemical Laboratory Diagnostics (CIMCL), Medical University of Graz, Graz 8036, Austria
| | - Gunter Almer
- Clinical Institute of Medical and Chemical Laboratory Diagnostics (CIMCL), Medical University of Graz, Graz 8036, Austria
| | - Wilfried Renner
- Clinical Institute of Medical and Chemical Laboratory Diagnostics (CIMCL), Medical University of Graz, Graz 8036, Austria
| | - Hans-Jürgen Gruber
- Clinical Institute of Medical and Chemical Laboratory Diagnostics (CIMCL), Medical University of Graz, Graz 8036, Austria
| | - Markus Herrmann
- Clinical Institute of Medical and Chemical Laboratory Diagnostics (CIMCL), Medical University of Graz, Graz 8036, Austria
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García-Martínez S, González-Gamo D, Fernández-Marcelo T, Tesolato S, De La Serna S, Domínguez-Serrano I, Cano-Valderrama O, Barabash A, De Juan C, Torres-García A, Iniesta P. Obesity and telomere status in the prognosis of patients with colorectal cancer submitted to curative intention surgical treatment. Mol Clin Oncol 2021; 15:184. [PMID: 34277003 DOI: 10.3892/mco.2021.2346] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 04/08/2021] [Indexed: 01/05/2023] Open
Abstract
The risk of colorectal cancer (CRC) development has been associated with telomere dysfunction and obesity. However, clinical relevance of these parameters in CRC prognosis is not clear. Therefore, the aim of the present study was to evaluate the impact of obesity and telomere status in the prognosis of patients affected by CRC and submitted to curative surgical treatment. According to published data, this is the first work in which obesity and telomere status are jointly considered in relation to CRC prognosis. A prospective study including 162 patients with CRC submitted to curative surgical treatment was performed. Subjects were classified according to their BMI. Telomere status was established through telomere length and telomerase activity evaluation. Statistical analyses were performed using the SPSS software package version 22. Telomere shortening was inversely associated with BMI in patients with CRC. Notably, among patients with CRC, subjects with obesity exhibited less shortening of tumor telomeres than non-obese patients (P=0.047). Patients with shorter telomeres, both in the tumor (median telomere length <6.5 kb) and their non-tumor paired tissues (median telomere length <7.1 kb), had the best clinical evolution, regardless of the Dukes' stage of cancers (P=0.025, for tumor samples; P=0.003, for non-tumor samples). Additionally, subjects with a BMI >31.85 kg/m2 showed the worse clinical outcomes compared with subjects with other BMI values. Interestingly, the impact of BMI showed sex dependence, since only the group of men displayed significant differences in CRC prognosis in relation to obesity status (P=0.037). From the results of the present study, based on a multivariate prediction model to establish prognosis, it was concluded that telomere length is a useful biomarker to predict prognosis in patients with CRC. Regardless of BMI values, the improved clinical evolution was associated with shorter telomeres. The impact of BMI seems to be associated with other factors, such as sex.
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Affiliation(s)
- Sergio García-Martínez
- Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, Complutense University, Madrid 28040, Spain
| | - Daniel González-Gamo
- Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, Complutense University, Madrid 28040, Spain
| | - Tamara Fernández-Marcelo
- Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, Complutense University, Madrid 28040, Spain.,Center for Biomedical Research Network on Diabetes and Associated Metabolic Diseases, San Carlos Hospital, Madrid 28040, Spain
| | - Sofía Tesolato
- Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, Complutense University, Madrid 28040, Spain
| | - Sofía De La Serna
- Digestive Surgery Service, San Carlos Hospital, Madrid 28040, Spain.,Sanitary Research Institute of San Carlos Hospital (IdISSC), Madrid 28040, Spain
| | - Inmaculada Domínguez-Serrano
- Digestive Surgery Service, San Carlos Hospital, Madrid 28040, Spain.,Sanitary Research Institute of San Carlos Hospital (IdISSC), Madrid 28040, Spain
| | - Oscar Cano-Valderrama
- Digestive Surgery Service, San Carlos Hospital, Madrid 28040, Spain.,Sanitary Research Institute of San Carlos Hospital (IdISSC), Madrid 28040, Spain
| | - Ana Barabash
- Center for Biomedical Research Network on Diabetes and Associated Metabolic Diseases, San Carlos Hospital, Madrid 28040, Spain.,Sanitary Research Institute of San Carlos Hospital (IdISSC), Madrid 28040, Spain.,Endocrinology and Nutrition Service, San Carlos Hospital, Madrid 28040, Spain
| | - Carmen De Juan
- Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, Complutense University, Madrid 28040, Spain.,Sanitary Research Institute of San Carlos Hospital (IdISSC), Madrid 28040, Spain
| | - Antonio Torres-García
- Digestive Surgery Service, San Carlos Hospital, Madrid 28040, Spain.,Sanitary Research Institute of San Carlos Hospital (IdISSC), Madrid 28040, Spain
| | - Pilar Iniesta
- Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, Complutense University, Madrid 28040, Spain.,Sanitary Research Institute of San Carlos Hospital (IdISSC), Madrid 28040, Spain
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8
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Yu YL, Liu H. Marital Quality and Salivary Telomere Length Among Older Men and Women in the United States. J Aging Health 2020; 33:300-309. [PMID: 33371776 DOI: 10.1177/0898264320980250] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Objective: The link between marital quality and cellular aging remains underexplored. This study examined how both positive and negative marital quality were associated with salivary telomere length among partnered adults in the United States over the age of 50°years. Methods: Data were from the 2008 Health and Retirement Study (N = 3203). Ordinary least squares regression was used to estimate the link between marital quality and telomere length. Results: While neither positive nor negative marital quality was significantly associated with telomere length among older women, positive and negative marital quality had an interacting effect on telomere length among men. Specifically, when negative marital quality was low, higher positive marital quality was associated with shorter telomere length, whereas when negative marital quality was high, higher positive marital quality was associated with longer telomere length. Discussion: The findings speak to the complex nature of intimate partnerships and the implications of these partnerships for cellular aging processes.
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Affiliation(s)
- Yan-Liang Yu
- Department of Sociology and Criminology, 8369Howard University, Washington, DC, USA
| | - Hui Liu
- Department of Sociology, 3078Michigan State University, East Lansing, MI, USA
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9
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Wang Y, Liu Z, Huang C, Zhao L, Jiang X, Liu Y, Liu Y, Wan Y, Chou Y, Li X. Analysis of lens epithelium telomere length in age-related cataract. Exp Eye Res 2020; 201:108279. [PMID: 32991882 DOI: 10.1016/j.exer.2020.108279] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 09/23/2020] [Accepted: 09/25/2020] [Indexed: 11/28/2022]
Abstract
We aimed to investigate the associations among lens epithelium telomere length (LETL), cataract types, and systemic pro-senescence factors in patients with age-related cataract. In this prospective study, the general demographic factors, body mass index, smoking history, depression, hypertension, diabetes, various psychological measures, and uncorrected distant visual acuity of patients with age-related cataract were recorded. Lens Opacities Classification System III (LOCS III) scores and lens density measured by Scheimpflug imaging were used to evaluate the cataracts. LETL was measured by real-time polymerase chain reaction. Correlations among these parameters were analyzed. The LOCS III nuclear opalescence (NO) score was associated with age (β = 0.053, P < 0.001) and Patient Health Questionnaire-9 score (β = -0.042, P = 0.004). Smoking was identified as a risk factor affecting LOCS III NO score (odds ratio = 1.546, 95% confidence interval, 1.128-2.119), but not the LOCS III cortical or posterior subcapsular scores. LETLs showed a weak association with systemic factors and LOCS III scores, and a significantly moderate correlation with the average objective lens densities of different regions measured by Scheimpflug imaging (r values ranged from -0.278 to -0.523, P < 0.05). However, there was no correlation between the LETLs and the maximum lens densities. The groups with a relatively low lens density had longer LETLs. In Conclusion, being an age-related disease, cortical cataract was also associated with "aging of the lens epithelium." Notably, lens epithelium activity rarely showed systemic effects. Thus, future studies should emphasize the importance of the telomeric system in cataractous process and aging.
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Affiliation(s)
- Yinhao Wang
- Peking University Third Hospital, Beijing, China
| | - Ziyuan Liu
- Peking University Third Hospital, Beijing, China
| | - Chen Huang
- Peking University Third Hospital, Beijing, China
| | | | | | - Yan Liu
- Peking University Third Hospital, Beijing, China
| | - Yushi Liu
- Peking University Third Hospital, Beijing, China
| | - Yu Wan
- Peking University Third Hospital, Beijing, China
| | - Yilin Chou
- Peking University Third Hospital, Beijing, China
| | - Xuemin Li
- Peking University Third Hospital, Beijing, China.
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Effect of Sechium edule var. nigrum spinosum (Chayote) on Telomerase Levels and Antioxidant Capacity in Older Adults with Metabolic Syndrome. Antioxidants (Basel) 2020; 9:antiox9070634. [PMID: 32708368 PMCID: PMC7402181 DOI: 10.3390/antiox9070634] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 07/16/2020] [Accepted: 07/16/2020] [Indexed: 02/06/2023] Open
Abstract
Patients with metabolic syndrome (MetS) have a redox imbalance, due to a decay in antioxidant capacity. Oxidative stress (OxS) is considered an important modulator of telomere shortening and telomerase activity. One of the fruits that has been associated with an antioxidant effect is Sechium edule and although its properties are well established, there is only one exploratory study evaluating its effectiveness in patients with MetS. The present investigation is a much more robust and controlled study, including a placebo group. Hence, we determined the effect of consumption of the dried fruit powder (500 mg, three times per day) for three months. We measured effects on telomerase levels, antioxidant capacity, and markers for OxS. The study was performed in a sample of 75 older adults: placebo group (n = 30) and experimental group (n = 45) with the diagnosis of MetS according to the National Adult Treatment Panel of the National Cholesterol Program III (NCEP/ATP III) criteria. All markers were measured before and after three months of treatment. There was a statistically significant decrease in lipoperoxides and protein carbonylation with an increased superoxide dismutase (SOD), as well as sustained levels of telomerase in patients who consumed Sechium edule. Our findings suggest that consumption of this fruit has a hypoglycemic, hypotensive, and antioxidant effect, without altering telomerase levels, which could suggest better protection against telomere shortening.
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11
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Semeraro MD, Smith C, Kaiser M, Levinger I, Duque G, Gruber HJ, Herrmann M. Physical activity, a modulator of aging through effects on telomere biology. Aging (Albany NY) 2020; 12:13803-13823. [PMID: 32575077 PMCID: PMC7377891 DOI: 10.18632/aging.103504] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Accepted: 06/04/2020] [Indexed: 12/16/2022]
Abstract
Aging is a complex process that is not well understood but involves finite changes at the genetic and epigenetic level. Physical activity is a well-documented modulator of the physiological process of aging. It has been suggested that the beneficial health effects of regular exercise are at least partly mediated through its effects on telomeres and associated regulatory pathways. Telomeres, the region of repetitive nucleotide sequences functioning as a "cap" at the chromosomal ends, play an important role to protect genomic DNA from degradation. Telomeres of dividing cells progressively shorten with age. Leucocyte telomere length (TL) has been associated with age-related diseases. Epidemiologic evidence indicates a strong relationship between physical activity and TL. In addition, TL has also been shown to predict all-cause and cardiovascular mortality. Experimental studies support a functional link between aerobic exercise and telomere preservation through activation of telomerase, an enzyme that adds nucleotides to the telomeric ends. However, unresolved questions regarding exercise modalities, pathomechanistic aspects and analytical issues limit the interpretability of available data. This review provides an overview about the current knowledge in the area of telomere biology, aging and physical activity. Finally, the capabilities and limitations of available analytical methods are addressed.
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Affiliation(s)
- Maria Donatella Semeraro
- Clinical Institute of Medical and Chemical Laboratory Diagnostics, Medical University of Graz, Graz, Austria
| | - Cassandra Smith
- Institute for Health and Sport (IHES), Victoria University, Melbourne, VIC, Australia
- Australian Institute for Musculoskeletal Science (AIMSS), University of Melbourne and Western Health, St Albans, VIC, Australia
| | - Melanie Kaiser
- Clinical Institute of Medical and Chemical Laboratory Diagnostics, Medical University of Graz, Graz, Austria
| | - Itamar Levinger
- Institute for Health and Sport (IHES), Victoria University, Melbourne, VIC, Australia
- Australian Institute for Musculoskeletal Science (AIMSS), University of Melbourne and Western Health, St Albans, VIC, Australia
| | - Gustavo Duque
- Australian Institute for Musculoskeletal Science (AIMSS), University of Melbourne and Western Health, St Albans, VIC, Australia
- Department of Medicine-Western Health, Melbourne Medical School, The University of Melbourne, Melbourne, VIC, Australia
| | - Hans-Juergen Gruber
- Clinical Institute of Medical and Chemical Laboratory Diagnostics, Medical University of Graz, Graz, Austria
| | - Markus Herrmann
- Clinical Institute of Medical and Chemical Laboratory Diagnostics, Medical University of Graz, Graz, Austria
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12
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Huang YQ, Liu L, Lo K, Huang JY, Zhang B, Feng YQ. The relationship between mean telomere length and blood pressure: results from the National Health and Nutrition Examination Surveys. ANNALS OF TRANSLATIONAL MEDICINE 2020; 8:535. [PMID: 32411758 PMCID: PMC7214907 DOI: 10.21037/atm.2020.03.205] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Background Recent studies have shown that telomere length has significantly relationship with different age-related diseases. However, the relationship between mean telomere length (MTL) and elevated blood pressure (BP) has been unclear. Therefore, the aim of the recent study was tried to explore the association of MLT with BP. Methods There were 5,981 subjects from the National Health and Nutrition Examination Surveys (NHANES, 1999–2002) was included in analysis. The MTL was measured using the quantitative polymerase chain reaction (PCR) method and expressed in telomere-to-single copy gene (T/S) ratio and grouped into quartiles. Multivariate linear [expressed in beta and 95% confidence interval (CI)], logistic regression [odds ratios (ORs) and 95% CI] analyses and smooth curve fitting were performed to evaluate the relationship between MTL, BPs and the likelihood of hypertension. Results The mean age of the participants was 45.2±17.3 years, including 2,923 (48.9%) males. After adjusting for potential confounders, MLT was significantly related to the prevalence of hypertension (OR: 0.12, 95% CI: 0.02, 0.94; P=0.04). Smooth curve fitting found a non-linear relationship between MTL, the levels of systolic and diastolic blood pressure (SBP/DBP) and the prevalence of hypertension. The inflection points for the smooth curve of MLT were at 0.86, 1.02 and 0.80 (T/S ratio) respectively. The betas (95% CIs) for SBP [–12.58 (–20.07, –5.09), P<0.01 and 2.25 (0.07, 4.43), P=0.04] and DBP [4.88 (1.29, 8.47), P<0.01 and –3.30 (–5.54, –1.06), P<0.01], and ORs (95% CIs) for the prevalence of hypertension [0.02 (0.001, 9.71), P=0.15 and 0.26 (0.026, 2.60), P=0.25] on the left and right of the inflection point, respectively. Conclusions Our findings revealed that MTL was related with SBP, DBP and the odds of hypertension in a non-linear manner.
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Affiliation(s)
- Yu-Qing Huang
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Academy of Medical Sciences, School of Medicine, South China University of Technology, Guangzhou 510080, China
| | - Lin Liu
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Academy of Medical Sciences, School of Medicine, South China University of Technology, Guangzhou 510080, China
| | - Kenneth Lo
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Academy of Medical Sciences, School of Medicine, South China University of Technology, Guangzhou 510080, China.,Center for Global Cardiometabolic Health, Department of Epidemiology, Brown University, Providence, RI, USA
| | - Jia-Yi Huang
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Academy of Medical Sciences, School of Medicine, South China University of Technology, Guangzhou 510080, China
| | - Bin Zhang
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Academy of Medical Sciences, School of Medicine, South China University of Technology, Guangzhou 510080, China
| | - Ying-Qing Feng
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Academy of Medical Sciences, School of Medicine, South China University of Technology, Guangzhou 510080, China
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13
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Praveen G, Shalini T, Sivaprasad M, Reddy GB. Relative telomere length and mitochondrial DNA copy number variation with age: Association with plasma folate and vitamin B12. Mitochondrion 2020; 51:79-87. [PMID: 31935457 DOI: 10.1016/j.mito.2020.01.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 12/01/2019] [Accepted: 01/10/2020] [Indexed: 01/03/2023]
Abstract
Telomere attrition and mitochondrial DNA variations are implicated in the biological aging process and genomic stability can be influenced by nutritional factors. This study aims to analyze the relative telomere length (rTL) and mitochondrial DNA copy number (mtCN) in aged individuals and their association with plasma folate and vitamin B12 levels. This community-based cross-sectional study involves 428 subjects (<60 years: 242 & ≥60 years: 186). Quantitative real-time PCR was used to measure rTL and mtCN variation, and radioimmunoassay to measure plasma folate and vitamin B12 levels. The subjects in the ≥60 years age group have significantly shorter telomeres and lower mtCN compared to the <60 years age group. A significant positive correlation was observed between the rTL and mtCN, and both of them were positively associated with plasma folate and vitamin B12 levels. In the ≥60 age group; folate and vitamin B12 positively correlated with rTL and vitamin B12 with mtCN. The study revealed a decline of rTL and mtCN with age in the Indian population and their association suggests that they may co-regulate each other with age. In conclusion, folate and vitamin B12 may delay aging by preventing the reduction in rTL length and mtCN.
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Affiliation(s)
- Guruvaiah Praveen
- Department of Biochemistry, National Institute of Nutrition (ICMR), Hyderabad, Telangana, India
| | - Tattari Shalini
- Department of Biochemistry, National Institute of Nutrition (ICMR), Hyderabad, Telangana, India
| | - Mudili Sivaprasad
- Department of Biochemistry, National Institute of Nutrition (ICMR), Hyderabad, Telangana, India
| | - G Bhanuprakash Reddy
- Department of Biochemistry, National Institute of Nutrition (ICMR), Hyderabad, Telangana, India.
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14
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Guest PC, Bernstein HG, Dobrowolny H, Borucki K, Westphal S, Steiner J. Measurement of a Surrogate Biomarker for Arginine Vasopressin Secretion in Association with Physiometric and Molecular Biomarkers of Aging. Methods Mol Biol 2020; 2138:251-262. [PMID: 32219754 DOI: 10.1007/978-1-0716-0471-7_17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A number of physiological changes are known to occur with aging, including increased fat mass, increased insulin resistance, and changes in the levels of circulating biomarkers such as lipids, growth factors, and hormones. Here, we present protocols for physiometric assessments, as well as measurements of circulating biomarkers of hormonal and growth factor function in individuals over the age range of 18-52 years. We also test for potential gender differences in the outcome measures.
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Affiliation(s)
- Paul C Guest
- Laboratory of Neuroproteomics, Department of Biochemistry and Tissue Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP, Brazil.
| | - Hans-Gert Bernstein
- Department of Psychiatry, University of Magdeburg, Magdeburg, Germany
- Laboratory of Translational Psychiatry, University of Magdeburg, Magdeburg, Germany
| | - Henrik Dobrowolny
- Department of Psychiatry, University of Magdeburg, Magdeburg, Germany
- Laboratory of Translational Psychiatry, University of Magdeburg, Magdeburg, Germany
| | - Katrin Borucki
- Institute of Clinical Chemistry and Pathobiochemistry, University of Magdeburg, Magdeburg, Germany
| | - Sabine Westphal
- Institute of Clinical Chemistry and Pathobiochemistry, University of Magdeburg, Magdeburg, Germany
| | - Johann Steiner
- Department of Psychiatry, University of Magdeburg, Magdeburg, Germany
- Laboratory of Translational Psychiatry, University of Magdeburg, Magdeburg, Germany
- Center for Behavioral Brain Sciences, Magdeburg, Germany
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15
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Willis M, Staudinger UM, Factor-Litvak P, Calvo E. Stress and Salivary Telomere Length in the Second Half of Life: A Comparison of Life-course Models. ADVANCES IN LIFE COURSE RESEARCH 2019; 39:34-41. [PMID: 31186623 PMCID: PMC6557584 DOI: 10.1016/j.alcr.2019.02.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Background Previous research has explored the relationship between childhood and adulthood stressful life events (SLEs) and adult salivary telomere length (TL), but no research to date has tested different life-course models in which stress in adulthood may fully, partly, or not mediate the relationship between childhood stress and adult TL. Methods To fill this gap, we elaborate over previous work by Puterman et al. (2016) and other standard models that do not account for the temporal order of stressors in childhood and adulthood, by using structural equation modeling (SEM) for a sample of 5,754 Health and Retirement Study (HRS) participants to compare the fit of three nested life-course models-social trajectory, early critical period, and cumulative risk. Results Results indicated that the social trajectory model, in which the association between childhood SLEs and TL in later adulthood is fully mediated by adulthood SLEs, fit the data better than the early critical period (no mediation) and cumulative risk (partial mediation) models. Conclusion In the social trajectory model, childhood SLEs are related to TL in later life only through adulthood SLEs. The direct physiological effect of childhood SLEs on TL in later life would be overestimated if adulthood SLEs are overlooked.
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Affiliation(s)
- Margaret Willis
- Department of Epidemiology, Mailman School of Public Health, Columbia University
| | - Ursula M. Staudinger
- Robert N. Butler Columbia Aging Center, Columbia University
- Department of Sociomedical Sciences, Mailman School of Public Health, Columbia University
| | - Pam Factor-Litvak
- Department of Epidemiology, Mailman School of Public Health, Columbia University
| | - Esteban Calvo
- Department of Epidemiology, Mailman School of Public Health, Columbia University
- Robert N. Butler Columbia Aging Center, Columbia University
- Society and Health Research Center, Facultad de Humanidades, Universidad Mayor
- Laboratory on Aging and Social Epidemiology, Universidad Mayor
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16
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Brown LL, Zhang YS, Mitchell C, Ailshire J. Does Telomere Length Indicate Biological, Physical, and Cognitive Health Among Older Adults? Evidence from the Health and Retirement Study. J Gerontol A Biol Sci Med Sci 2018; 73:1626-1632. [PMID: 29346517 PMCID: PMC6230208 DOI: 10.1093/gerona/gly001] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Indexed: 12/26/2022] Open
Abstract
Telomere length (TL) has been suggested as a biomarker that can indicate individual variability in the rate of aging. Yet, it remains unclear whether TL is related to recognized indicators of health in an aging, older nationally representative sample. We examine whether TL is associated with 15 biological, physical, and cognitive markers of health among older adults ages 54+. TL was assayed from saliva using quantitative polymerase chain reaction (T/S ratio) in the 2008 Health and Retirement Study (n = 4,074). We estimated probability of high-risk levels across indictors of health by TL and age-singly and jointly. TL was associated with seven indicators of poor functioning: high-density lipoprotein and total cholesterol, cystatin C, pulse pressure, body mass index, lung function, and walking speed. However, after adjusting for age, associations were substantially attenuated; only associations with cholesterol and lung function remained significant. Additionally, findings show TL did not add to the predictive power of chronological age in predicting poor functioning. While TL may not be a useful clinical marker of functional aging in an older adult population, it may still play an important role in longitudinal studies in young and middle aged populations that attempt to understand aging.
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Affiliation(s)
- Lauren L Brown
- Leonard Davis School of Gerontology, University of Southern California, Los Angeles
| | - Yuan S Zhang
- Leonard Davis School of Gerontology, University of Southern California, Los Angeles
| | - Colter Mitchell
- Institute for Social Research, University of Michigan, Ann Arbor
| | - Jennifer Ailshire
- Leonard Davis School of Gerontology, University of Southern California, Los Angeles
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17
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Longitudinal associations of lifetime adiposity with leukocyte telomere length and mitochondrial DNA copy number. Eur J Epidemiol 2018; 33:485-495. [PMID: 29619669 DOI: 10.1007/s10654-018-0382-z] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Accepted: 03/20/2018] [Indexed: 12/12/2022]
Abstract
Adiposity may cause adverse health outcomes by increasing oxidative stress and systemic inflammation, which can be reflected by altered telomere length (TL) and mitochondrial DNA copy number (mtCN) in peripheral blood leukocytes. However, little is known about the influence of lifetime adiposity on TL and mtCN in later life. This study was performed to investigate the associations of lifetime adiposity with leukocyte TL and mtCN in 9613 participants from the Nurses' Health Study. A group-based trajectory modelling approach was used to create trajectories of body shape from age 5 through 60 years, and a genetic risk score (GRS) was created based on 97 known adiposity susceptibility variants. Associations of body shape trajectories and GRS with dichotomized TL and mtCN were assessed by logistic regression models. After adjustment for lifestyle and dietary factors, compared with the lean-stable group, the lean-marked increase group had higher odds of having below-median TL (OR = 1.18, 95% CI 1.04, 1.35; P = 0.01), and the medium-marked increase group had higher odds of having below-median mtCN (OR = 1.28, 95% CI 1.00, 1.64; P = 0.047). There was a suggestive trend toward lower mtCN across the GRS quartiles (P for trend = 0.07). In conclusion, telomere attrition may be accelerated by marked weight gain in middle life, whereas mtCN is likely to be reduced persistently by adiposity over the life course. The findings indicate the importance of lifetime weight management to preserve functional telomeres and mitochondria.
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18
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Batsis JA, Mackenzie TA, Vasquez E, Germain CM, Emeny RT, Rippberger P, Lopez-Jimenez F, Bartels SJ. Association of adiposity, telomere length and mortality: data from the NHANES 1999-2002. Int J Obes (Lond) 2018; 42:198-204. [PMID: 28816228 PMCID: PMC5858938 DOI: 10.1038/ijo.2017.202] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Revised: 07/18/2017] [Accepted: 08/06/2017] [Indexed: 12/25/2022]
Abstract
BACKGROUND/OBJECTIVES Telomere shortening is associated with age and risk of medical comorbidity. We assessed the relationship between measures of adiposity, leukocyte telomere length, and mortality and whether it is modified by age. SUBJECTS/METHODS Subjects with dual-energy X-ray absorptiometry measures were identified using the National Health and Nutrition Examination Survey 1999-2002. Obesity was categorized using two body fat definitions (BF1%: men ⩾25%; females ⩾35%; BF2% ⩾28% and ⩾38%, respectively), body mass index (BMI) and waist circumference (WC; men ⩾102 cm; females ⩾88 cm). Telomere length relative to standard reference DNA (T/S ratio) was assessed using quantitative PCR. Weighted multivariable regression models evaluated the association of telomere length with adiposity, both continuously and categorically (low/normal BF%, low/high WC and standard BMI categories). Differences in telomere length by age and adiposity were ascertained and subsequent models were stratified by age. Proportional hazard models assessed the risk of mortality by adiposity status. A telomere by adiposity interaction was tested in the entire cohort and by age category (<60 vs ⩾60 years; <70 vs ⩾70 years). RESULTS We identified 7827 subjects. Mean age was 46.1 years. Overall telomere length was 1.05±0.01 (s.e.) that differed by BF1% (low/high: 1.12±0.02 vs 1.03±0.02; P<0.001), BF2% (1.02±0.02 vs 1.11±0.02; P<0.001), BMI (underweight 1.08±0.03; normal 1.09±0.02; overweight 1.04±0.02; and obese 1.03±0.02;P<0.001) and WC (low/high 1.09±0.02 vs 1.02±0.02; P<0.001). Adjusted β-coefficients evaluating the relationship between telomere length and adiposity (measured continuously) were as follows: BF1% (β=-0.0033±0.0008; P<0.001), BF2% (-0.041±0.008; P<0.001), BMI (β=-0.025±0.0008; P=0.005) and WC (β=-0.0011±0.0004; P=0.007). High BF% (BF1%: β=-0.035±0.011; P=0.002; BF2%: β=-0.041±0.008; P<0.001) and WC (β=-0.035±0.011; P=0.008) were inversely related to telomere length (TL). Stratifying by age, high BF1% (-0.061±0.013), BF2% (-0.065±0.01), BMI-obesity (-0.07±0.015) and high WC (-0.048±0.013) were significant (all P<0.001). This association diminished with increasing age. In older participants, TL was inversely related to mortality (hazard ratio 0.36 (0.27, 0.49)), as were those classified by BF1% (0.68 (0.56, 0.81)), BF2% (0.75 (0.65, 0.80)), BMI (0.50 (0.42, 0.60)) and WC (0.72 (0.63, 0.83)). No interaction was observed between adiposity status, telomere length and mortality. CONCLUSIONS Obesity is associated with shorter telomere length in young participants, a relationship that diminishes with increasing age. It does not moderate the relationship with mortality.
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Affiliation(s)
- John A. Batsis
- Section of General Internal Medicine, Dartmouth-Hitchcock Medical Center, Lebanon, NH
- Geisel School of Medicine at Dartmouth and The Dartmouth Institute for Health Policy & Clinical
- Dartmouth Centers for Health and Aging, Dartmouth College, Hanover, NH
- Health Promotion Research Center at Dartmouth, Lebanon, NH
- Dartmouth Weight & Wellness Center, Lebanon, NH
| | - Todd A. Mackenzie
- Geisel School of Medicine at Dartmouth and The Dartmouth Institute for Health Policy & Clinical
- Department of Biomedical Data Science, Geisel School of Medicine at Dartmouth Practice, Lebanon, NH
| | - Elizabeth Vasquez
- Department of Epidemiology, School of Public Health, SUNY Albany, Albany, NY
| | | | - Rebecca T. Emeny
- Geisel School of Medicine at Dartmouth and The Dartmouth Institute for Health Policy & Clinical
| | - Peter Rippberger
- University of New England College of Osteopathic Medicine, Biddeford, ME
| | - Francisco Lopez-Jimenez
- Division of Cardiovascular Disease, Department of Medicine, Mayo Clinic, Rochester, MN, 55905
| | - Stephen J. Bartels
- Geisel School of Medicine at Dartmouth and The Dartmouth Institute for Health Policy & Clinical
- Dartmouth Centers for Health and Aging, Dartmouth College, Hanover, NH
- Health Promotion Research Center at Dartmouth, Lebanon, NH
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19
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Wulaningsih W, Watkins J, Matsuguchi T, Hardy R. Investigating the associations between adiposity, life course overweight trajectories, and telomere length. Aging (Albany NY) 2017; 8:2689-2701. [PMID: 27650676 PMCID: PMC5191863 DOI: 10.18632/aging.101036] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2016] [Accepted: 08/29/2016] [Indexed: 12/11/2022]
Abstract
Obesity may accelerate ageing through chronic inflammation. To further examine this association, we assessed current adiposity, adiposity at early adulthood and life course overweight trajectories in relation to leukocyte telomere length (LTL). We included a total of 7,008 nationally representative U.S. residents and collected information on objectively measured body mass index (BMI), waist circumference and percent body fat. BMI at age 25 and overweight trajectories were assessed using self-reported history. Leukocyte telomere length (LTL) relative to a standard DNA reference (T/S ratio) was quantified by polymerase chain reaction (PCR). Linear regression models were used to examine the difference in LTL across adiposity measures at examination, BMI at age 25, and overweight trajectories. A 0.2% decrease in telomere length (95% CI:−0.3 to −0.07%) was observed for every kg/m2 increase in BMI, whereas a unit increase in waist circumference (cm) and percent body fat contributed to a 0.09% and 0.01% decrease in LTL, respectively. Higher BMI and being obese at age 25 contributed to lower LTL at older ages. Associations between weight loss through life course and LTL were observed, which further marked the importance of life course adiposity dynamics as a determinant of ageing.
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Affiliation(s)
- Wahyu Wulaningsih
- Medical Research Council Unit for Lifelong Health and Ageing at UCL, University College London, London WC1B 5JU, UK.,Division of Haematology/Oncology, Faculty of Medicine, Universitas Gadjah Mada, Yogyakarta 55292, Indonesia.,PILAR Research and Education, Cambridge CB1 2JD, UK
| | | | - Tetsuya Matsuguchi
- Department of Biochemistry and Biophysics, University of California, San Francisco, CA 94158, USA.,Driver Group, L.L.C., San Francisco, CA 94158, USA
| | - Rebecca Hardy
- Medical Research Council Unit for Lifelong Health and Ageing at UCL, University College London, London WC1B 5JU, UK
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20
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Zhou Y, Simmons D, Lai D, Hambly BD, McLachlan CS. rs9939609 FTO genotype associations with FTO methylation level influences body mass and telomere length in an Australian rural population. Int J Obes (Lond) 2017; 41:1427-1433. [PMID: 28559540 DOI: 10.1038/ijo.2017.127] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Revised: 03/26/2017] [Accepted: 05/07/2017] [Indexed: 12/18/2022]
Abstract
BACKGROUND The fat mass- and obesity-associated (FTO) gene influences energy homeostasis in humans. Although the obesity-related variant, rs9939609 has been replicated across a number of cohort studies, there remains significant variance and a low to modest association. Telomere length is another commonly reported obesity risk factor. We hypothesize understanding the associations between FTO rs9939609 with FTO methylation and telomere length will provide a more accurate assessment of obesity risk. METHODS Overall, 942 participants free of diabetes or pre-diabetes were included in the retrospective study. Leukocyte genomic DNA was analyzed for rs9939609 genotyping, FTO gene methylation and leukocyte telomere length (LTL) measurement. RESULTS In general linear models, rs9939609 AA genotypes were associated with increased fat percentage (3.15%, P=0.001), fat mass (4.16 kg, P=0.001), body mass index (BMI) (1.38, P=0.006) and waist circumference (3.35 cm, P=0.006), but not with FTO methylation or LTL in this overall population. However, when participants were stratified into higher and lower FTO methylation groups, the AA genotype possesses a 2.04-fold increased obesity risk in comparison to TT genotype (95%CI, 1.07-3.89, P=0.031) in participants with a higher FTO methylation level, but this association was absent in the lower FTO methylation sub-group. Moreover, AT and AA genotype carriers were associated with shorter LTL compared to TT carriers (P=0.020 and P=0.111, respectively) in the higher FTO methylation level group. However, this association was absent in the lower methylation group. Furthermore, FTO gene methylation level was significantly associated with LTL in the 942 samples (P=0.017). CONCLUSIONS FTO rs9939609 is associated with obesity risk and LTL in this study, where this association is only observed at higher, but not lower, FTO methylation levels of participants. Our data suggest association of multiple factors, including FTO methylation level, may be involved in one of several mechanisms underlying the commonly reported obesity risk of this FTO polymorphism.
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Affiliation(s)
- Y Zhou
- Rural Clinical School, University of New South Wales, Sydney, New South Wales, Australia
| | - D Simmons
- Rural Clinical School, University of MelbourneI, Shepparton, Victoria, Australia.,School of Medicine, Western Sydney University, Sydney, New South Wales, Australia
| | - D Lai
- School of Medical Sciences and Bosch Institute, University of Sydney, Sydney, New South Wales, Australia
| | - B D Hambly
- Discipline of Pathology and Bosch Institute, University of Sydney, Sydney, New South Wales, Australia
| | - C S McLachlan
- Rural Clinical School, University of New South Wales, Sydney, New South Wales, Australia
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