Evidence map›Paper›PMID 26694360›Full record

ArticleInternational journal of molecular sciences2015

DNA Double Strand Break Response and Limited Repair Capacity in Mouse Elongated Spermatids.

Emad A Ahmed, Harry Scherthan, Dirk G de Rooij

Open access · goldAbstract read
In one paragraph

Article in International journal of molecular sciences, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
1.2field-weighted citation impact, top 21% of its field
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

20 citing papers in PubMed, 43 citations in OpenAlex.

  1. Sperm DNA Fragmentation: The Concept and Its Use in Assisted Reproduction.Advances in experimental medicine and biology · 2026
    Review
  2. Review
  3. Article
  4. Review
  5. Perspective in the Mechanisms for Repairing Sperm DNA Damage.Reproductive sciences (Thousand Oaks, Calif.) · 2025
    Review
  6. Male aging in germ cells: What are we inheriting?Genetics and molecular biology · 2025
    Article
  7. Review
  8. Article
  9. Article
  10. Article
  11. Unraveling the Molecular Impact of Sperm DNA Damage on Human Reproduction.Advances in experimental medicine and biology · 2022
    Article
  12. DNA Repair in Haploid Context.International journal of molecular sciences · 2021
    Review
  13. Article
  14. Review
  15. Article
  16. Frontiers in endocrinology · 2021
    Article
  17. Review
  18. Gene Knock-Ins inGenetics · 2020
    Article
  19. Review
  20. DNA Damage and Repair in Human Reproductive Cells.International journal of molecular sciences · 2018
    Review
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

3 authors at 3 institutions in 4 countries.

Emad A AhmedLaboratory of Immunology and Molecular Physiology, Department of Zoology, Faculty of Science, Assiut University, Assiut 71516, Egypt. emad.ahmed@science.au.edu.eg.
Harry ScherthanInstitute für Radiobiologie der Bundeswehr in Verb. mit der University, Ulm, Neuherbergstr, 11, Munich D-80937, Germany. scherth@web.de.
Dirk G de RooijReproductive Biology Group, Division of Developmental Biology, Department of Biology, Faculty of Science, Utrecht University, Utrecht 3584CM, The Netherlands. D.G.deRooij@uu.nl.
Assiut University · EGInstitut für Radiobiologie der BundeswehrUtrecht University · NL

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Spermatids are extremely sensitive to genotoxic exposures since during spermiogenesis only error-prone non homologous end joining (NHEJ) repair pathways are available. Hence, genomic damage may accumulate in sperm and be transmitted to the zygote. Indirect, delayed DNA fragmentation and lesions associated with apoptotic-like processes have been observed during spermatid elongation, 27 days after irradiation. The proliferating spermatogonia and early meiotic prophase cells have been suggested to retain a memory of a radiation insult leading later to this delayed fragmentation. Here, we used meiotic spread preparations to localize phosphorylate histone H2 variant (γ-H2AX) foci marking DNA double strand breaks (DSBs) in elongated spermatids. This technique enabled us to determine the background level of DSB foci in elongated spermatids of RAD54/RAD54B double knockout (dko) mice, severe combined immunodeficiency SCID mice, and poly adenosine diphosphate (ADP)-ribose polymerase 1 (PARP1) inhibitor (DPQ)-treated mice to compare them with the appropriate wild type controls. The repair kinetics data and the protein expression patterns observed indicate that the conventional NHEJ repair pathway is not available for elongated spermatids to repair the programmed and the IR-induced DSBs, reflecting the limited repair capacity of these cells. However, although elongated spermatids express the proteins of the alternative NHEJ, PARP1-inhibition had no effect on the repair kinetics after IR, suggesting that DNA damage may be passed onto sperm. Finally, our genetic mutant analysis suggests that an incomplete or defective meiotic recombinational repair of Spo11-induced DSBs may lead to a carry-over of the DSB damage or induce a delayed nuclear fragmentation during the sensitive programmed chromatin remodeling occurring in elongated spermatids.

Indexed as

DNA Breaks, Double-StrandedDNA RepairAnimalsAntigens, NuclearChromosomal Proteins, Non-HistoneDNA-Binding ProteinsHistonesKineticsKu AutoantigenMaleMeiosisMice, KnockoutMice, SCIDPhosphorylationRadiation, IonizingRecombination, GeneticAntigens, NuclearChromosomal Proteins, Non-HistoneDNA-Binding Proteinsgamma-H2AX protein, mouseHistonesKu AutoantigenTrp53bp1 protein, mouseTumor Suppressor p53-Binding Protein 1Xrcc6 protein, mouseDNA repairelongated spermatidsNHEJPARP1-inhibited miceRad54/Rad54B deficient miceSCID mice

Identifiers

PMID26694360
PMCPMC4691157
OpenAlexW2197566225

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.