A cross-sectional assessment of oxidative DNA damage and muscle strength among elderly people living in the community

Abstract

Objectives: The mechanism by which muscle weakness leads to an increased risk of death remains a subject of interest. In this context, the aim of this study is to assess the relationship between urinary 8-hydroxy-2′- deoxyguanosine (8-OHdG) and muscle strength, and other risk factors contributing to poor muscle strength in older persons. Methods: This was a cross-sectional study in which a total of 86 participants, both men and women, aged 65 years or above were screened for urinary 8-OHdG, and muscle strength as measured by handgrip strength. Results: Handgrip strength was lower in participants who had history of acute or chronic disease. Urinary 8-OHdG level was negatively associated with muscle strength, and the association remained after adjusting for confounding factors. Conclusions: Urinary 8-OHdG is associated with muscle strength. These findings may be clinically relevant as there is a possibility of controlling oxidative DNA damage by healthy behaviors related to lifestyle. © 2013 The Japanese Society for Hygiene.