Evidence map›Paper›PMID 26846451›Full record

ArticleExperimental & molecular medicine2016

16S rRNA gene-based metagenomic analysis reveals differences in bacteria-derived extracellular vesicles in the urine of pregnant and non-pregnant women.

Jae Young Yoo, Mina Rho, Young-Ah You, Eun Jin Kwon, Min-Hye Kim, Sungmin Kym, Young-Koo Jee, Yoon-Keun Kim, Young Ju Kim

Registry-linked trialOpen access · goldAbstract read
In one paragraph

Article in Experimental & molecular medicine, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT03841994 (Association of Gut Microbiome With Neonatal Complications and Neurodevelopment in Preterm Infants), which is not on this map. Cited by 62 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
62citing papers in PubMed, 1 pooled it
2.3field-weighted citation impact, top 13% 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.

NCT03841994 completednot on this mapstarted 2018, after this paper: background citation

Association of Gut Microbiome With Neonatal Complications and Neurodevelopment in Preterm Infants

TypeobservationalSponsorSeoul National University HospitalRan2018 to 2024Enrolled47ConditionsPreterm Infants
3 · Its place in the literature

Who cites it

62 citing papers in PubMed, 1 synthesis or guideline pooled it, 67 citations in OpenAlex.

  1. Guideline
  2. Effects ofNutrients · 2021
    Trial
  3. Trial
  4. Article
  5. Review
  6. Article
  7. Review
  8. Review
  9. Secretory phospholipase ACommunications biology · 2025
    Article
  10. Vaginal microbiome and its implications in preterm birth.Obstetrics & gynecology science · 2025
    Review
  11. Article
  12. Article
  13. Review
  14. Extracellular Vesicles as Biomarkers of Pregnancy Complications.International journal of molecular sciences · 2024
    Review
  15. Review
  16. Review
  17. Review
  18. Review
  19. Review
  20. Article

2 more citing papers are in PubMed but not listed here.

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

9 authors at 6 institutions in 1 country.

Jae Young YooDepartment of Obstetrics and Gynecology, School of Medicine and Ewha Medical Institute, Ewha Womans University, Ewha Medical Center, Seoul, South Korea.ORCID http://orcid.org/0000-0001-7119-5421
Mina RhoDepartment of Computer Engineering, Hanyang University, Seoul, South Korea.
Young-Ah YouDepartment of Obstetrics and Gynecology, School of Medicine and Ewha Medical Institute, Ewha Womans University, Ewha Medical Center, Seoul, South Korea.
Eun Jin KwonDepartment of Obstetrics and Gynecology, School of Medicine and Ewha Medical Institute, Ewha Womans University, Ewha Medical Center, Seoul, South Korea.
Min-Hye KimDepartment of Internal Medicine, School of Medicine, Ewha Womans University, Seoul, South Korea.
Sungmin KymDepartment of Internal Medicine, Inje University College of Medicine, Busan, South Korea.
Young-Koo JeeDepartment of Internal Medicine, College of Medicine, Dankook University, Cheonan, South Korea.
Yoon-Keun KimDepartment of Medicine, School of Medicine, Ewha Womans University and Ewha Institute of Convergence Medicine, Ewha Medical Center, Seoul, South Korea.
Young Ju KimDepartment of Obstetrics and Gynecology, School of Medicine and Ewha Medical Institute, Ewha Womans University, Ewha Medical Center, Seoul, South Korea.ORCID http://orcid.org/0000-0002-3153-3008
Ewha Womans University · KREwha Womans University Medical Center · KRDankook University · KRHanyang University · KRInje University · KRNational Institute of Animal Science · KR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Recent evidence has indicated that bacteria-derived extracellular vesicles (EVs) are important for host-microbe communication. The aims of the present study were to evaluate whether bacteria-derived EVs are excreted via the urinary tract and to compare the composition of bacteria-derived EVs in the urine of pregnant and non-pregnant women. Seventy-three non-pregnant and seventy-four pregnant women were enrolled from Dankook University and Ewha Womans University hospitals. DNA was extracted from urine EVs after EV isolation using the differential centrifugation method. 16S ribosomal RNA (16S rRNA) gene sequencing was performed using high-throughput 454 pyrosequencing after amplification of the V1-V3 region of the 16S rDNA. The composition of 13 taxa differed significantly between the pregnant and non-pregnant women. At the genus level, Bacillus spp. EVs were more significantly enriched in the urine of the pregnant women than in that of the non-pregnant women (45.61% vs 0.12%, respectively). However, Pseudomonas spp. EVs were more dominant in non-pregnant women than in pregnant women (13.2% vs 4.09%, respectively). Regarding the compositional difference between pregnant women with normal and preterm delivery, EVs derived from Ureaplasma spp. and the family Veillonellaceae (including Megasphaera spp.) were more abundant in the urine of preterm-delivered women than in that of women with normal deliveries. Taken together, these data showed that Bacillus spp. EVs predominate in the urine of pregnant women, whereas Pseudomonas spp. EVs predominate in the urine of non-pregnant women; this suggests that Bacillus spp. EVs might have an important role in the maintenance of pregnancy.

Indexed as

MetagenomeMetagenomicsAdultBacteriaBacteriuriaCluster AnalysisExtracellular VesiclesFemaleHumansPregnancyRNA, Ribosomal, 16SYoung AdultRNA, Ribosomal, 16S

Identifiers

PMID26846451
PMCPMC4892867
OpenAlexW2267258377

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

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.