Evidence map›Paper›PMID 29179435›Full record

ArticleOncotarget2017

Genome-wide 5-hydroxymethylcytosine patterns in human spermatogenesis are associated with semen quality.

Olga A Efimova, Anna A Pendina, Andrei V Tikhonov, Sergey E Parfenyev, Irina D Mekina, Evgeniia M Komarova, Mariia A Mazilina, Eugene V Daev, Olga G Chiryaeva, Ilona A Galembo and 8 more

Abstract read
In one paragraph

Article in Oncotarget, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed
–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

22 citing papers in PubMed.

  1. Review
  2. Article
  3. Review
  4. Epigenetics of nonobstructive azoospermia.Asian journal of andrology · 2025
    Review
  5. Article
  6. Article
  7. Review
  8. Article
  9. Article
  10. Telomere Length in Metaphase Chromosomes of Human Triploid Zygotes.International journal of molecular sciences · 2021
    Article
  11. Frontiers in endocrinology · 2021
    Article
  12. Article
  13. Article
  14. Review
  15. Review
  16. Article
  17. Bisphenol A Exposure and Sperm ACHE Hydroxymethylation in Men.International journal of environmental research and public health · 2019
    Article
  18. Article
  19. Review
  20. 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

18 authors.

Olga A EfimovaD.O. Ott Research Institute of Obstetrics, Gynecology and Reproductology, St. Petersburg, Russia.
Anna A PendinaD.O. Ott Research Institute of Obstetrics, Gynecology and Reproductology, St. Petersburg, Russia.
Andrei V TikhonovD.O. Ott Research Institute of Obstetrics, Gynecology and Reproductology, St. Petersburg, Russia.
Sergey E ParfenyevSt. Petersburg State University, St. Petersburg, Russia.
Irina D MekinaD.O. Ott Research Institute of Obstetrics, Gynecology and Reproductology, St. Petersburg, Russia.
Evgeniia M KomarovaD.O. Ott Research Institute of Obstetrics, Gynecology and Reproductology, St. Petersburg, Russia.
Mariia A MazilinaD.O. Ott Research Institute of Obstetrics, Gynecology and Reproductology, St. Petersburg, Russia.
Eugene V DaevSt. Petersburg State University, St. Petersburg, Russia.
Olga G ChiryaevaD.O. Ott Research Institute of Obstetrics, Gynecology and Reproductology, St. Petersburg, Russia.
Ilona A GalemboCenter for Medical Genetics, St. Petersburg, Russia.
Mikhail I KrapivinSt. Petersburg State University, St. Petersburg, Russia.
Oleg S GlotovD.O. Ott Research Institute of Obstetrics, Gynecology and Reproductology, St. Petersburg, Russia.
Irina S StepanovaInstitute of Cytology RAS, St. Petersburg, Russia.
Svetlana A ShlykovaAVA-Peter Clinic, St. Petersburg, Russia.
Igor Yu KoganD.O. Ott Research Institute of Obstetrics, Gynecology and Reproductology, St. Petersburg, Russia.
Alexander M GzgzyanD.O. Ott Research Institute of Obstetrics, Gynecology and Reproductology, St. Petersburg, Russia.
Tatyana V KuznetzovaD.O. Ott Research Institute of Obstetrics, Gynecology and Reproductology, St. Petersburg, Russia.
Vladislav S BaranovD.O. Ott Research Institute of Obstetrics, Gynecology and Reproductology, St. Petersburg, Russia.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

We performed immunofluorescent analysis of DNA hydroxymethylation and methylation in human testicular spermatogenic cells from azoospermic patients and ejaculated spermatozoa from sperm donors and patients from infertile couples. In contrast to methylation which was present throughout spermatogenesis, hydroxymethylation was either high or almost undetectable in both spermatogenic cells and ejaculated spermatozoa. On testicular cytogenetic preparations, 5-hydroxymethylcytosine was undetectable in mitotic and meiotic chromosomes, and was present exclusively in interphase spermatogonia Ad and in a minor spermatid population. The proportions of hydroxymethylated and non-hydroxymethylated diploid and haploid nuclei were similar among samples, suggesting that the observed alterations of 5-hydroxymethylcytosine patterns in differentiating spermatogenic cells are programmed. In ejaculates, a few spermatozoa had high 5-hydroxymethylcytosine level, while in the other ones hydroxymethylation was almost undetectable. The percentage of highly hydroxymethylated (5-hydroxymethylcytosine-positive) spermatozoa varied strongly among individuals. In patients from infertile couples, it was higher than in sperm donors (

Indexed as

5-hydroxymethylcytosinehuman spermatogenesisPathology Sectionsemen qualitysperm DNA fragmentationtesticular spermatogenic cells

Identifiers

PMID29179435
PMCPMC5687605

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.