Evidence map›Paper›PMID 22594646›Full record

ArticleBMC medicine2012

Common variants in mismatch repair genes associated with increased risk of sperm DNA damage and male infertility.

Guixiang Ji, Yan Long, Yong Zhou, Cong Huang, Aihua Gu, Xinru Wang

Open access · goldAbstract read
In one paragraph

Article in BMC medicine, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 43 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
43citing papers in PubMed, 1 pooled it
4.0field-weighted citation impact, top 6% 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

43 citing papers in PubMed, 1 synthesis or guideline pooled it, 100 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Review
  4. Review
  5. Article
  6. Article
  7. Perspective in the Mechanisms for Repairing Sperm DNA Damage.Reproductive sciences (Thousand Oaks, Calif.) · 2025
    Review
  8. Article
  9. Male Fertility as a Proxy for Health.Journal of clinical medicine · 2024
    Review
  10. Review
  11. Article
  12. Review
  13. Article
  14. Review
  15. Review
  16. Review
  17. Article
  18. Review
  19. Article
  20. Sperm Functional Genome Associated With Bull Fertility.Frontiers in veterinary science · 2021
    Review
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

6 authors at 4 institutions in 1 country.

Guixiang JiState Key Laboratory of Reproductive Medicine, Institute of Toxicology, Nanjing Medical University, Nanjing 210029, China. aihuagu@njmu.edu.cn
Yan Long
Yong Zhou
Cong Huang
Aihua Gu
Xinru Wang
Nanjing Medical University · CNChina Pharmaceutical University · CNChinese Academy of Sciences · CNMinistry of Ecology and Environment · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe mismatch repair (MMR) pathway plays an important role in the maintenance of the genome integrity, meiotic recombination and gametogenesis. This study investigated whether genetic variations in MMR genes are associated with an increased risk of sperm DNA damage and male infertility.

methodsWe selected and genotyped 21 tagging single nucleotide polymorphisms (SNPs) in five MMR genes (MLH1, MLH3, PMS2, MSH4 and MSH5) using the SNPstream 12-plex platform in a case-control study of 1,292 idiopathic infertility patients and 480 fertile controls in a Chinese population. Sperm DNA damage levels were detected with the Tdt-mediated dUTP nick end labelling (TUNEL) assay in 450 cases. Fluorescence resonance energy transfer (FRET) and co-immunoprecipitation techniques were employed to determine the effects of functional variants.

resultsOne intronic SNP in MLH1 (rs4647269) and two non-synonymous SNPs in PMS2 (rs1059060, Ser775Asn) and MSH5 (rs2075789, Pro29Ser) seem to be risk factors for the development of azoospermia or oligozoospermia. Meanwhile, we also identified a possible contribution of PMS2 rs1059060 to the risk of male infertility with normal sperm count. Among patients with normal sperm count, MLH1 rs4647269 and PMS2 rs1059060 were associated with increased sperm DNA damage. Functional analysis revealed that the PMS2 rs1059060 can affect the interactions between MLH1 and PMS2.

conclusionsOur results provide evidence supporting the involvement of genetic polymorphisms in MMR genes in the aetiology of male infertility.

Indexed as

DNA DamageDNA Mismatch RepairGenetic Predisposition to DiseaseAdultChinaChromatin ImmunoprecipitationDNA Repair EnzymesFluorescence Resonance Energy TransferHumansInfertility, MaleIn Situ Nick-End LabelingMalePolymorphism, Single NucleotideRisk AssessmentSpermatozoaDNA Repair Enzymes

Identifiers

PMID22594646
PMCPMC3378460
OpenAlexW2017374110

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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.