Lack of association between PBMC telomere length and endurance exercise

Denham, Joshua ORCID: (2017) Lack of association between PBMC telomere length and endurance exercise. Journal of Applied Biomedicine, 15 (1). pp. 9-13. ISSN 1214-021X


Telomeres are repetitive DNA located at the ends of chromosomes that preserve genomic stability. Excessive leukocyte telomere shortening is associated with cardio-metabolic disease and increased mortality risk. Although most studies indicate exercise training could attenuate leukocyte telomere attrition, data is somewhat equivocal. The inconsistencies could be partly explained by the different populations of leukocytes isolated for telomere length assessment. Accordingly, average peripheral blood mononuclear cell (PBMC) and whole blood leukocyte telomere length were assessed in 44 endurance athletes and 40 healthy controls using quantitative PCR. While whole blood leukocyte telomeres were, on average, 6.1% longer in endurance athletes compared to controls, PBMC telomere length was similar between the two cohorts in age and sex-adjusted analyses (athletes vs controls, mean T/S ratio ± SE: 3.25 ± 0.05 vs 3.23 ± 0.05, p = 0.72). Other than a weak inverse correlation with sitting (r = −0.25, p = 0.03), no statistically significant correlations were found between PBMC telomere length and exercise parameters. Unlike whole blood leukocytes, PBMC telomere length is not associated with endurance exercise and exercise parameters. These findings suggest the need for future work to quantify short and long telomeres of sorted immune cell populations and to measure them in context with cell counts and exercise traits.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 14 Dec 2021 03:33
Last Modified: 15 Dec 2021 02:53
Uncontrolled Keywords: Ageing; Biological age; Exercise; Leukocytes; Peripheral blood mononuclear cell
Fields of Research (2008): 06 Biological Sciences > 0604 Genetics > 060499 Genetics not elsewhere classified
11 Medical and Health Sciences > 1106 Human Movement and Sports Science > 110602 Exercise Physiology
Fields of Research (2020): 31 BIOLOGICAL SCIENCES > 3105 Genetics > 310599 Genetics not elsewhere classified
42 HEALTH SCIENCES > 4207 Sports science and exercise > 420702 Exercise physiology
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