Investig Clin Urol.
2021 Mar;62(2):233-238. 10.4111/icu.20200066.
Aging increases oxidative stress in semen
- Affiliations
-
- 1Denentoshi Ladies Clinic, Yokohama, Kanagawa, Japan
- 2Department of Urology, Reproduction Center, Yokohama City University Medical Center, Yokohama, Kanagawa, Japan
- KMID: 2513149
- DOI: http://doi.org/10.4111/icu.20200066
Abstract
- Purpose
As age increases, oxidative stress increases, sperm motility decreases, and DNA fragmentation increases. To date, reports of age-related effects on semen have focused on reactive oxygen species (ROS) or total antioxidant capacity (TAC) as indicators of oxidative stress. However, assessments of ROS and TAC must be considered within a more comprehensive context in order to correctly evaluate oxidative stress and interpret findings. In this regard, the purpose of this study was to investigate the relationship between the static oxidation reduction potential (sORP) and paternal age with the goal of using the sORP as an indicator of semen oxidative stress.
Materials and Methods
Semen samples from 173 men were analyzed for the following parameters: volume, motility, and beat cross frequency (BCF). The sORP was measured by using the MiOXSYS TM system. The correlation between semen parameters and the sORP level was analyzed as a function of age. The rate of sORP positivity was compared between men <34 and ≥34 years of age, with a positive sORP defined as a level ≥1.38.
Results
Volume, motility, and BCF were negatively correlated with age (p<0.001). The semen sORP level was positively correlated with age (p<0.05). The rate of sORP positivity was significantly increased in men ≥34 years of age compared with that in men <34 years of age (33% compared with 12%, respectively; p<0.01).
Conclusions
The sORP may play a role in age-related decreases in semen parameters (volume, motility, and BCF). The rate of sORP positivity increased significantly after 34 years of age.
