Evidence map›Paper›PMID 33660452›Full record

ArticleInvestigative and clinical urology2021

Aging increases oxidative stress in semen.

Mitsuru Nago, Akane Arichi, Naoki Omura, Yuka Iwashita, Toshihiro Kawamura, Yasushi Yumura

Abstract read
In one paragraph

Article in Investigative and clinical urology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

16 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Article
  3. Review
  4. Article
  5. Article
  6. Wine-ProcessedFood science & nutrition · 2025
    Article
  7. Age-Associated Proteomic Changes in Human Spermatozoa.International journal of molecular sciences · 2025
    Article
  8. Article
  9. Review
  10. Male reproductive ageing: a radical road to ruin.Human reproduction (Oxford, England) · 2023
    Article
  11. Review
  12. Article
  13. Role of oxidative stress in male infertility.Reproduction & fertility · 2023
    Review
  14. Article
  15. Testicular aging, male fertility and beyond.Frontiers in endocrinology · 2022
    Review
  16. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Mitsuru NagoDenentoshi Ladies Clinic, Yokohama, Kanagawa, Japan. nago@art.email.ne.jp.ORCID 0000-0001-7961-1549
Akane ArichiDenentoshi Ladies Clinic, Yokohama, Kanagawa, Japan.ORCID 0000-0002-5476-3615
Naoki OmuraDenentoshi Ladies Clinic, Yokohama, Kanagawa, Japan.ORCID 0000-0003-1087-3545
Yuka IwashitaDenentoshi Ladies Clinic, Yokohama, Kanagawa, Japan.ORCID 0000-0001-7462-1983
Toshihiro KawamuraDenentoshi Ladies Clinic, Yokohama, Kanagawa, Japan.ORCID 0000-0002-3443-4304
Yasushi YumuraDepartment of Urology, Reproduction Center, Yokohama City University Medical Center, Yokohama, Kanagawa, Japan.ORCID 0000-0003-0909-478X

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeAs 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

methodsSemen 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.

resultsVolume, 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).

conclusionsThe 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.

Indexed as

Oxidative StressAdultAge FactorsAgingHumansMaleMiddle AgedSemenYoung AdultAgingOxidation reductionOxidative stressSemenSperm

Identifiers

PMID33660452
PMCPMC7940853

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.