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Aging increases oxidative stress in semen

Investigative and Clinical Urology 2021년 62권 2호 p.233 ~ 238
Nago Mitsuru, Arichi Akane, Omura Naoki, Iwashita Yuka, Kawamura Toshihiro, Yumura Yasushi,
소속 상세정보
 ( Nago Mitsuru ) - Denentoshi Ladies Clinic
 ( Arichi Akane ) - Denentoshi Ladies Clinic
 ( Omura Naoki ) - Denentoshi Ladies Clinic
 ( Iwashita Yuka ) - Denentoshi Ladies Clinic
 ( Kawamura Toshihiro ) - Denentoshi Ladies Clinic
 ( Yumura Yasushi ) - Yokohama City University Medical Center Reproduction Center Department of Urology

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™ 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.

키워드

Aging; Oxidation reduction; Oxidative stress; Semen; Sperm

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