Evidence map›Paper›PMID 33895935›Full record

ArticleJournal of assisted reproduction and genetics2021

Mitochondrial nicotinamide adenine dinucleotide hydride dehydrogenase (NADH) subunit 4 (MTND4) polymorphisms and their association with male infertility.

Fatina W Dahadhah, Mayyas Saleh Jaweesh, Mazhar Salim Al Zoubi, Manal Issam Abu Alarjah, Mohamad Eid Hammadeh, Houda Amor

Open access · hybridAbstract read
In one paragraph

Article in Journal of assisted reproduction and genetics, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed, 1 pooled it
1.3field-weighted citation impact, top 23% 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

7 citing papers in PubMed, 1 synthesis or guideline pooled it, 13 citations in OpenAlex.

  1. Pooled it
  2. Novel Variants in Sperm Mitochondrial Cytochrome C Oxidase II (Current issues in molecular biology · 2025
    Article
  3. Review
  4. Article
  5. Glaucomatous retinal ganglion cells: death and protection.International journal of ophthalmology · 2025
    Review
  6. Article
  7. 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 at 2 institutions in 2 countries.

Fatina W DahadhahDepartment of Obstetrics & Gynaecology, Saarland University, Homburg, Saar, Germany. fwdhadha11@outlook.com.ORCID http://orcid.org/0000-0003-2673-2691
Mayyas Saleh JaweeshDepartment of Obstetrics & Gynaecology, Saarland University, Homburg, Saar, Germany.
Mazhar Salim Al ZoubiDepartment of Basic Medical Sciences, Faculty of Medicine, Yarmouk University, Irbid, 21163, Jordan.ORCID https://orcid.org/0000-0003-0248-4777
Manal Issam Abu AlarjahDepartment of Basic Medical Sciences, Faculty of Medicine, Yarmouk University, Irbid, 21163, Jordan.
Mohamad Eid HammadehDepartment of Obstetrics & Gynaecology, Saarland University, Homburg, Saar, Germany.ORCID https://orcid.org/0000-0001-8513-622X
Houda AmorDepartment of Obstetrics & Gynaecology, Saarland University, Homburg, Saar, Germany.ORCID https://orcid.org/0000-0003-1442-8836
Saarland University · DEYarmouk University · JO

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThe purpose of the present study was to determine the relationship between infertility and the polymorphisms of mitochondrial NADH dehydrogenase subunit 4 (MTND4) by spermatozoa analysis in fertile and subfertile men.

methodsSamples were divided into 68 subfertile men (case group) and 44 fertile men (control group). After semen analysis, samples were purified. The whole genome was extracted using a QIAamp DNA Mini Kit and the mitochondrial DNA was amplified by using the REPLI-g Mitochondrial DNA Kit. Polymerase chain reaction (PCR) was used to amplify the MT-ND4 gene. Then, samples were purified and sequenced using the Sanger method.

resultsTwenty-five single-nucleotide polymorphisms (SNPs) were identified in the MTND4 gene. The genotype frequencies of the study population showed a statistically significant association between rs2853495 G>A (Gly320Gly) and male infertility (P = 0.0351). Similarly, the allele frequency test showed that rs2853495 G>A (Gly320Gly) and rs869096886 A>G (Leu164Leu) were significantly associated with male infertility (adjusted OR = 2.616, 95% CI = 1.374-4.983, P = 0.002; adjusted OR = 2.237, 95% CI = 1.245-4.017, P = 0.007, respectively).

conclusionIn conclusion, our findings suggested that male infertility was correlated with rs2853495 and rs869096886 SNPs in MTND4.

Indexed as

Polymorphism, Single NucleotideAdultCase-Control StudiesDNA, MitochondrialGenotypeHumansInfertility, MaleMaleMiddle AgedMitochondriaNADH DehydrogenaseSpermatozoaDNA, MitochondrialNADH DehydrogenaseNADH dehydrogenase subunit 4Male infertilitymtDNAMTND4SNP

Identifiers

PMID33895935
PMCPMC8417158
OpenAlexW3159411372

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.