Evidence map›Paper›PMID 34344601›Full record

ArticleReproductive biomedicine online2021

Assessing the testicular sperm microbiome: a low-biomass site with abundant contamination.

Nerea M Molina, Julio Plaza-Díaz, Ramiro Vilchez-Vargas, Alberto Sola-Leyva, Eva Vargas, Raquel Mendoza-Tesarik, Maribel Galán-Lázaro, Nicolás Mendoza-Ladrón de Guevara, Jan Tesarik, Signe Altmäe

Abstract read
PubMed Publisher
In one paragraph

Article in Reproductive biomedicine online, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers.

0numbers the graph read from it
0cells of the map it votes in
26citing 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

26 citing papers in PubMed.

  1. Review
  2. Review
  3. Review
  4. Review
  5. Review
  6. Article
  7. Review
  8. Article
  9. Review
  10. Article
  11. Review
  12. Biology · 2024
    Article
  13. Article
  14. Review
  15. Article
  16. Review
  17. Review
  18. Exploring the microbiome-gut-testis axis in testicular germ cell tumors.Frontiers in cellular and infection microbiology · 2024
    Review
  19. Review
  20. Human Male Genital Tract Microbiota.International journal of molecular sciences · 2023
    Review
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

10 authors.

Nerea M MolinaUniversity of Granada, Department of Biochemistry and Molecular Biology I, Faculty of Sciences, Granada 18071, Spain; Instituto de Investigación Biosanitaria ibs.GRANADA, Granada 18014, Spain.
Julio Plaza-DíazInstituto de Investigación Biosanitaria ibs.GRANADA, Granada 18014, Spain; University of Granada, Department of Biochemistry and Molecular Biology II, Faculty of Pharmacy, Granada 18071, Spain; Institute of Nutrition and Food Technology (INYTA), 'José Mataix Verdú' Biomedical Research Centre (CIBM), University of Granada, Granada 18016, Spain; Children's Hospital of Eastern Ontario Research Institute, Ottawa ON K1H 8L1, Canada.
Ramiro Vilchez-VargasDepartment of Gastroenterology, Hepatology, and Infectious Diseases, Otto von Guericke University Hospital Magdeburg, Magdeburg 39120, Germany.
Alberto Sola-LeyvaUniversity of Granada, Department of Biochemistry and Molecular Biology I, Faculty of Sciences, Granada 18071, Spain; Instituto de Investigación Biosanitaria ibs.GRANADA, Granada 18014, Spain.
Eva VargasSystems Biology Unit, Department of Experimental Biology, Faculty of Experimental Sciences, University of Jaen, Jaen 23071, Spain.
Raquel Mendoza-TesarikMARGen Clinic, Molecular Assisted Reproduction and Genetics, Granada 18006, Spain.
Maribel Galán-LázaroMARGen Clinic, Molecular Assisted Reproduction and Genetics, Granada 18006, Spain.
Nicolás Mendoza-Ladrón de GuevaraUniversity of Granada, Department of Obstetrics and Gynecology, Faculty of Medicine, Granada 18071, Spain.
Jan TesarikMARGen Clinic, Molecular Assisted Reproduction and Genetics, Granada 18006, Spain.
Signe AltmäeUniversity of Granada, Department of Biochemistry and Molecular Biology I, Faculty of Sciences, Granada 18071, Spain; Instituto de Investigación Biosanitaria ibs.GRANADA, Granada 18014, Spain; Competence Centre on Health Technologies, Tartu 50410, Estonia. Electronic address: signealtmae@ugr.es.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

research questionThe semen harbours a diverse range of microorganisms. The origin of the seminal microbes, however, has not yet been established. Do testicular spermatozoa harbour microbes and could they potentially contribute to the seminal microbiome composition?

designThe study included 24 samples, comprising a total of 307 testicular maturing spermatozoa. A high-throughput sequencing method targeting V3 and V4 regions of 16S rRNA gene was applied. A series of negative controls together with stringent in-silico decontamination methods were analysed.

resultsBetween 50 and 70% of all the detected bacterial reads accounted for contamination in the testicular sperm samples. After stringent decontamination, Blautia (P = 0.04), Cellulosibacter (P = 0.02), Clostridium XIVa (P = 0.01), Clostridium XIVb (P = 0.04), Clostridium XVIII (P = 0.02), Collinsella (P = 0.005), Prevotella (P = 0.04), Prolixibacter (P = 0.02), Robinsoniella (P = 0.04), and Wandonia (P = 0.04) genera demonstrated statistically significant abundance among immature spermatozoa.

conclusionsOur results indicate that the human testicle harbours potential bacterial signature, though in a low-biomass, and could contribute to the seminal microbiome composition. Further, applying stringent decontamination methods is crucial for analysing microbiome in low-biomass site.

Indexed as

AdultAgedCase-Control StudiesDNA FragmentationHigh-Throughput Nucleotide SequencingHumansInfertility, MaleMaleMicrobiotaMiddle AgedRNA, Ribosomal, 16SSemen AnalysisSequence Analysis, DNASpermatozoaTestisRNA, Ribosomal, 16SMale infertilityMicrobiomeMicrobiotaSemenSperm

Identifiers

What OpenQuestion holds

Textmetadata
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.