Document Type
Article
Publication Date
9-1-2012
Publication Title
Journals of Gerontology - Series A Biological Sciences and Medical Sciences
Abstract
We evaluated the impact of long-term exercise on telomere dynamics in wild-derived short telomere mice (CAST/Ei) over 1 year. We observed significant telomere shortening in liver and cardiac tissues in sedentary 1-year-old mice compared with young (8 weeks) baseline mice that were attenuated in exercised 1-year-old animals. In contrast, skeletal muscle exhibited significant telomere shortening in exercise mice compared with sedentary and young mice. Telomerase enzyme activity was increased in skeletal muscle of exercise compared with sedentary animals but was similar in cardiac and liver tissues. We observed significant age-related decreases in expression of telomere-related genes that were attenuated by exercise in cardiac and skeletal muscle but not liver. Protein content of TRF1 was significantly increased in plantaris muscle with age. In summary, long-term exercise altered telomere dynamics, slowing age-related decreases in telomere length in cardiac and liver tissue but contributing to shortening in exercised skeletal muscle.
Keywords
Aging, Cast/Ei mice, Shelterin, Telomerase, Telomere length
Volume
67 A
Issue
9
First Page
911
Last Page
926
DOI
10.1093/gerona/gls002
ISSN
10795006
Rights
© The Authors 2012.
Recommended Citation
Ludlow, Andrew T.; Witkowski, Sarah; Marshall, Mallory R.; Wang, Jenny; Lima, Laila C.J.; Guth, Lisa M.; Spangenburg, Espen E.; and Roth, Stephen M., "Chronic Exercise Modifies Age-Related Telomere Dynamics in a Tissue-Specific Fashion" (2012). Exercise and Sport Studies: Faculty Publications, Smith College, Northampton, MA.
https://scholarworks.smith.edu/ess_facpubs/18
Comments
Archived as published.