scholarly journals Leukocyte Telomere Length in Patients with Multiple Sclerosis and Its Association with Clinical Phenotypes

2021 ◽  
Author(s):  
Michael Hecker ◽  
Brit Fitzner ◽  
Kathrin Jäger ◽  
Jan Bühring ◽  
Margit Schwartz ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Telomere Length ◽  
Statistical Tests ◽  
Quantitative Polymerase Chain Reaction ◽  
Polymerase Chain Reaction Method ◽  
Biological Aging ◽  
Leukocyte Telomere Length ◽  
Cross Sectional ◽  
Association Analyses ◽  
Telomere Attrition

AbstractAging is a significant factor influencing the course of multiple sclerosis (MS). Accelerated telomere attrition is an indicator of premature biological aging and a potential contributor to various chronic diseases, including neurological disorders. However, there is currently a lack of studies focusing on telomere lengths in patients with MS. We measured the average leukocyte telomere length (LTL) in biobanked DNA samples of 40 relapsing-remitting MS patients (RRMS), 20 primary progressive MS patients (PPMS), and 60 healthy controls using a multiplex quantitative polymerase chain reaction method. Changes in LTL over a period of >10 years were evaluated in a subset of 10 patients. Association analyses of baseline LTL with the long-term clinical profiles of the patients were performed using inferential statistical tests and regression models adjusted for age and sex. The cross-sectional analysis revealed that the RRMS group was characterized by a significantly shorter relative LTL, on average, as compared to the PPMS group and controls. Shorter telomeres at baseline were also associated with a higher conversion rate from RRMS to secondary progressive MS (SPMS) in the 10-year follow-up. The LTL decrease over time was similar in RRMS patients and PPMS patients in the longitudinal analysis. Our data suggest a possible contributory role of accelerated telomere shortening in the pathobiology of MS. The interplay between disease-related immune system alterations, immunosenescence, and telomere dynamics deserves further investigation. New insights into the mechanisms of disease might be obtained, e.g., by exploring the distribution of telomere lengths in specific blood cell populations.

scholarly journals Sex-specific educational attainment is associated with telomere length in an Australian rural population

QJM ◽  
2020 ◽  
Vol 113 (7) ◽  
pp. 469-473
Author(s):  
Y Zhou ◽  
B D Hambly ◽  
D Simmons ◽  
C S McLachlan
Keyword(s):  
Health Insurance ◽  
Educational Attainment ◽  
Telomere Length ◽  
Rural Population ◽  
Quantitative Polymerase Chain Reaction ◽  
Later Life ◽  
Polymerase Chain Reaction Method ◽  
Education Attainment ◽  
Access To Health Services ◽  
Cross Sectional

Abstract Background There is limited understanding on whether and how socioeconomic status (SES), particularly educational attainment and household income, impacts on telomere length in an Australian rural context. Additionally, it is unknown whether access to health services via the Australian public or private health system influences telomere length. Aim This study investigates whether there is a relationship between telomere length and SES indicators (income, education) as well as health insurance status in a rural Australian population. Methods Samples were drawn from the Australian Rural Victoria cross-sectional Crossroads Study. Leucocyte telomere length (LTL) was measured using a multiplex quantitative polymerase chain reaction method. Results Among 1424 participants, we did not find a significant main effect association with LTL across education, income level and health insurance. An exploratory finding was sex may influence the relationship between educational attainment and LTL (P = 0.021). In males, but not females, higher education was associated with longer LTL by 0.033 [95% confidence interval (CI) 0.002–0.063, P = 0.035]; in those with low education attainment, male participants had shorter LTL by 0.058 (95% CI −0.086 to −0.029) than female participants (P < 0.0001). Conclusion Being male and having lower education attainment was associated with shorter telomere length in our rural population. Evidence from our study supports the importance of education on LTL in males in rural Australia. Our studies also support previous findings that LTL in later life may not be closely associated with indicators of SES.

scholarly journals Association Between Dietary Selenium Intake and Leukocyte Telomere Length in a Nationally Representative Sample of US Adults (OR11-06-19)

2019 ◽  
Vol 3 (Supplement_1) ◽  
Author(s):  
Buyun Liu ◽  
Yangbo Sun ◽  
Guifeng Xu ◽  
Shuang Rong ◽  
Wei Bao
Keyword(s):  
Telomere Length ◽  
Representative Sample ◽  
Quantitative Polymerase Chain Reaction ◽  
Antioxidant Properties ◽  
Biological Aging ◽  
Leukocyte Telomere Length ◽  
Telomere Shortening ◽  
Dietary Selenium ◽  
Selenium Intake ◽  
Nationally Representative

Abstract Objectives DNA damage induced by oxidative stress is implicated in accelerated telomere shortening, a biomarker of biological aging. Although selenium has antioxidant properties, its impact on telomere length is largely unknown. This study aimed to examine the association between dietary selenium intake and leukocyte telomere length in a nationally representative sample of US adults. Methods We included 7409 adults aged 20 years or older who participated in the National Health and Nutrition Examination Survey (NHANES) 1999–2002. Dietary selenium intake was calculated using data collected in the 24-hour dietary recall. Leukocyte telomere length was assayed using the quantitative polymerase chain reaction method. The association between selenium intake and telomere length was estimated by weighted linear regression models adjusting for demographic, socioeconomic and lifestyle factors, body mass index, supplements intake, and leukocyte cell type composition. Results The average dietary selenium intake was 109.1 mg/d (standard error [SE] 1.15). We didn't find a significant association between dietary selenium intake and telomere length in US adults. The average telomere length (SE) was 1.01 (0.02), 1.01 (0.01), and 1.04 (0.01) across increasing tertiles of dietary selenium intake. However, a significant interaction was observed for age (P = 0.02). Among individuals aged 20–44 years, the β coefficient of log-transformed telomere length, compared to lowest tertile of dietary selenium intake, was −0.041 (SE 0.012, P = 0.002) and −0.033 (SE 0.018, P = 0.07) for middle tertile and the highest tertile of selenium intake, respectively. The corresponding β coefficient was 0.009 (SE 0.016, P = 0.59) and −0.001 (SE 0.012, P = 0.95), respectively, for adults 45–64 years old, and 0.017 (SE 0.015, P = 0.28) and 0.059 (SE 0.021, P = 0.01), respectively, for those aged 65 years or older. The results were not appreciably changed even after additionally adjustment for dietary intake of vitamin A, vitamin E, and zinc. Conclusions The association between dietary selenium intake and telomere length differed significantly by age groups, indicating that higher selenium intake may prevent telomere shortening in older adults but not in younger or middle-aged adults. Further studies about the underlying mechanisms are warranted. Funding Sources NA.

scholarly journals Fruit and Vegetable Intake and Telomere Length in a Random Sample of 5448 U.S. Adults

Nutrients ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 1415
Author(s):  
Larry A. Tucker
Keyword(s):  
Telomere Length ◽  
Random Sample ◽  
Vegetable Intake ◽  
Quantitative Polymerase Chain Reaction ◽  
Cellular Aging ◽  
Fruit And Vegetable Intake ◽  
Biological Aging ◽  
Fruit And Vegetable ◽  
Base Pairs ◽  
Cross Sectional

The relationship between fruit and vegetable intake and telomere length was examined using a cross-sectional design and an NHANES random sample of 5448 U.S. adults. Fruit and vegetable (F&V) consumption was assessed using a 24 h recall, and telomere length, an index of cellular aging, was measured using the quantitative polymerase chain reaction method. Telomere length was linearly related to F&V intake when combined (F = 22.7, p < 0.0001) and also when separated as fruit (F = 7.2, p < 0.0121) or vegetables (F = 15.4, p < 0.0005), after adjusting for covariates. Specifically, telomeres were 27.8 base pairs longer for each 100 g (3.5 ounces) of F&V consumed. Because each additional year of chronological age was associated with telomeres that were 14.9 base pairs shorter, when women and men were analyzed together, results indicated that a 100 g (3.5 oz) per day increment in F&V corresponded with 1.9 years less biological aging. When the 75th percentile of F&V intake was compared to the 25th, the difference was 4.4 years of cellular aging. When separated by sex, fruits and vegetables were both related to telomere length in women, but only vegetable intake was predictive of telomere length in men. In conclusion, evidence based on a random sample of U.S. adults indicates that the more the servings of F&V, the longer telomeres tend to be.

scholarly journals Effect of adiposity on leukocyte telomere length in US adults by race/ethnicity: The National Health and Nutrition Examination Survey

2019 ◽  
Author(s):  
Sharon K. Davis ◽  
Ruihua Xu ◽  
Rumana J. Khan ◽  
Amadou Gaye ◽  
Yie Liu
Keyword(s):  
Health Behaviors ◽  
Telomere Length ◽  
Biological Aging ◽  
Leukocyte Telomere Length ◽  
Nutrition Examination Survey ◽  
Telomere Attrition ◽  
Health And Nutrition ◽  
The Us ◽  
Race Ethnicity ◽  
The Relationship

AbstractObjectiveObesity is associated with telomere attrition – a marker of cellular and biological aging. The US has the highest proportion of obesity and is comprised of a racially/ethnic diverse population. Little is known about the relationship between obesity and telomere attrition according to race/ethnicity in the US. Our objective is to examine the differential association.Design and settingThe effect of body mass index (BMI), % total body fat (TBF) and waist circumference (WC) on leukocyte telomere length (LTL) were examined as adiposity measures according to race/ethnicity and sex specific race/ethnicity using separate adjusted linear regressions on a sample of 4,919 respondents aged 20-84 years from cross-sectional 1999-2002 data using the US National Health and Nutrition Examination Survey. Mediation analyses assessed health behaviors associated with relationship between adiposity measures and LTL.Main outcome measureLTLResultsAfrican Americans (AA) experienced a 28% and 11% decrease in LTL associated with increasing BMI and WC, (p=.02 and .03) respectively. Mexican Americans (MA) experienced a 33% decrease in LTL associated with increasing %TBF (p=.04). Whites experienced a 19%, 23%, and .08% decrease in LTL associated with increasing BMI, %TBF, and WC, (p=.05, .003, .02) respectively. White men experienced a 26% decrease in LTL due to increasing BMI (p=.05). AA women experienced a 41%, 44%, and 16% decrease in LTL due to increasing BMI, %TBF, and WC, respectively (p=.007, .02, .04). White women experienced a 29% decrease in LTL associated with increasing %TBF (p=.006). Selected health behaviors were associated with the relationship between adiposity measures and LTL.ConclusionOverall, AA and Whites have worse cellular and biological aging related to collective adiposity measures. According to sex, AA women experienced more deleterious cellular and biological aging. Findings suggest tailored interventions to improve adverse behaviors that contribute to obesity may improve telomere attrition in US adults.

scholarly journals Leukocyte Telomere Length in Relation to 17 Biomarkers of Cardiovascular Disease Risk: A Cross-Sectional Study of US Adults

PLoS Medicine ◽  
2016 ◽  
Vol 13 (11) ◽  
pp. e1002188 ◽  
Author(s):  
David H. Rehkopf ◽  
Belinda L. Needham ◽  
Jue Lin ◽  
Elizabeth H. Blackburn ◽  
Ami R. Zota ◽  
...  
Keyword(s):  
Cardiovascular Disease ◽  
Telomere Length ◽  
Disease Risk ◽  
Cardiovascular Disease Risk ◽  
Cross Sectional Study ◽  
Leukocyte Telomere Length ◽  
Sectional Study ◽  
Cross Sectional

scholarly journals Telomere length and age-dependent telomere attrition: the blood-and-muscle model

2019 ◽  
Vol 97 (4) ◽  
pp. 328-334 ◽  
Author(s):  
Mirna N. Chahine ◽  
Simon Toupance ◽  
Sandy El-Hakim ◽  
Carlos Labat ◽  
Sylvie Gautier ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Telomere Length ◽  
Cross Sectional Study ◽  
Muscle Model ◽  
Atherosclerotic Cardiovascular Disease ◽  
Cross Sectional ◽  
Telomere Attrition ◽  
Age Related ◽  
Age Dependent ◽  
Muscle Biopsies

Short telomere length (TL) is associated with atherosclerotic cardiovascular disease (ACVD) and other age-related diseases. It is unclear whether these associations originate from having inherently short TL or a faster TL attrition before or during disease development. We proposed the blood-and-muscle model to assess TL dynamics throughout life course. Our objective was to measure TL in leukocytes (LTL) and in skeletal muscle (MTL), which served as a proxy of TL at birth. The delta (MTL–LTL) represented life-long telomere attrition. Blood draws and skeletal muscle biopsies were performed on 35 Lebanese individuals undergoing surgery. Following DNA extraction, LTL and MTL were measured by Southern blot. In every individual aged between 30 and 85 years, MTL was longer than LTL. With age, MTL and LTL decreased, but the delta (MTL–LTL) increased by 14 bp/year. We validated the blood-and-muscle model that allowed us to identify TL, TL at birth, and lifelong TL attrition in a cross-sectional study. This model can be used in larger cross-sectional studies to evaluate the association of telomere dynamics with age-related diseases onset and progression.

scholarly journals Leukocyte Telomere Length Is Unrelated to Cognitive Performance Among Non-Demented and Demented Persons: An Examination of Long Life Family Study Participants

2020 ◽  
Vol 26 (9) ◽  
pp. 906-917
Author(s):  
Adiba Ashrafi ◽  
Stephanie Cosentino ◽  
Min S. Kang ◽  
Joseph H. Lee ◽  
Nicole Schupf ◽  
...  
Keyword(s):  
Cognitive Impairment ◽  
Telomere Length ◽  
Semantic Processing ◽  
Family Study ◽  
Clinical Information ◽  
Biological Aging ◽  
Leukocyte Telomere Length ◽  
Information Processing Speed ◽  
Long Life ◽  
Study Participants

AbstractObjective:Leukocyte telomere length (LTL) is a widely hypothesized biomarker of biological aging. Persons with shorter LTL may have a greater likelihood of developing dementia. We investigate whether LTL is associated with cognitive function, differently for individuals without cognitive impairment versus individuals with dementia or incipient dementia.Method:Enrolled subjects belong to the Long Life Family Study (LLFS), a multi-generational cohort study, where enrollment was predicated upon exceptional family longevity. Included subjects had valid cognitive and telomere data at baseline. Exclusion criteria were age ≤ 60 years, outlying LTL, and missing sociodemographic/clinical information. Analyses were performed using linear regression with generalized estimating equations, adjusting for sex, age, education, country, generation, and lymphocyte percentage.Results:Older age and male gender were associated with shorter LTL, and LTL was significantly longer in family members than spouse controls (p < 0.005). LTL was not associated with working or episodic memory, semantic processing, and information processing speed for 1613 cognitively unimpaired individuals as well as 597 individuals with dementia or incipient dementia (p < 0.005), who scored significantly lower on all cognitive domains (p < 0.005).Conclusions:Within this unique LLFS cohort, a group of families assembled on the basis of exceptional survival, LTL is unrelated to cognitive ability for individuals with and without cognitive impairment. LTL does not change in the context of degenerative disease for these individuals who are biologically younger than the general population.

scholarly journals Association Between Short Leukocyte Telomere Length, Endotoxemia, and Severe Periodontitis in People With Diabetes: A Cross-Sectional Survey

Diabetes Care ◽  
2014 ◽  
Vol 37 (4) ◽  
pp. 1140-1147 ◽  
Author(s):  
Stefano Masi ◽  
Nikolaos Gkranias ◽  
KaWa Li ◽  
Klelia D. Salpea ◽  
Mohamed Parkar ◽  
...  
Keyword(s):  
Telomere Length ◽  
Leukocyte Telomere Length ◽  
Cross Sectional Survey ◽  
Cross Sectional ◽  
Severe Periodontitis

scholarly journals Dietary Magnesium Intake and Leukocyte Telomere Attrition in Adults: The Regulatory Role of Serum Tumor Necrosis Factor α

2020 ◽  
Vol 2020 ◽  
pp. 1-6 ◽  
Author(s):  
Jie Yu ◽  
Haibin Liu ◽  
Shuli He ◽  
Pingping Li ◽  
Chunxiao Ma ◽  
...  
Keyword(s):  
Tumor Necrosis Factor ◽  
Telomere Length ◽  
Tumor Necrosis ◽  
Leukocyte Telomere Length ◽  
Cross Sectional ◽  
Magnesium Intake ◽  
Dietary Magnesium ◽  
Sectional Analysis ◽  
Necrosis Factor ◽  
Serum Tumor Necrosis

Objectives. In this study, we assessed the effects of dietary magnesium on leukocyte telomere length (LTL). Designs. The current cross-sectional analysis was based on data collected within a type 2 diabetes project. Settings. Dietary magnesium intake is associated with peripheral blood leukocyte telomere length (LTL). However, few epidemiological studies have evaluated the effects of magnesium on LTL in the clinical setting. Participants. This cross-sectional analysis included 467 participants (34.8% men). Measurements. Serum blood lipid profile, HbA1c, oxidative stress, and proinflammatory mediator levels were measured. Detailed dietary data were obtained using a 24 h food recall. LTL was assessed using a real-time PCR assay. Regression models and simple regulatory models were used for data analysis. Results. There was an inverse relationship between dietary magnesium and LTL (P<0.001), with a between-extreme-quarter difference of -0.55. Conversely, there was a positive relationship between dietary magnesium and serum tumor necrosis factor (TNF) α, with an interquarter difference of 3.79 pmol/mL (P for trend=0.006). Multivariate regression analysis revealed that the odds ratios (ORs) for shorter LTL and higher serum TNFα increased with magnesium intake, and the ORs of the differences between extreme quartiles were 2.60 (95% confidence interval (CI): 1.31–5.36; P=0.003) and 1.98 (95% CI: 1.09–3.59; P=0.008). There was a direct negative effect of dietary magnesium intake on LTL (B=−0.002; P=0.001), which appeared to be indirectly influenced by TNFα (-0.002 to -0.0005). Conclusions. Dietary magnesium intake may be a critical component of the cellular aging process, and its effect could be partly mediated by TNFα.

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