Evidence map›Paper›PMID 26387596›Full record

ArticleScientific reports2015

A multi-platform metabolomics approach identifies highly specific biomarkers of bacterial diversity in the vagina of pregnant and non-pregnant women.

Amy McMillan, Stephen Rulisa, Mark Sumarah, Jean M Macklaim, Justin Renaud, Jordan E Bisanz, Gregory B Gloor, Gregor Reid

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 73 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
73citing papers in PubMed, 1 pooled it
9.6field-weighted citation impact, top 1% 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

73 citing papers in PubMed, 1 synthesis or guideline pooled it, 127 citations in OpenAlex.

  1. Pooled it
  2. Effect of Oral ProbioticNutrients · 2020
    Trial
  3. Trial
  4. Review
  5. Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Review
  11. Review
  12. EngineeringBiodesign research · 2025
    Article
  13. Article
  14. Article
  15. Review
  16. Article
  17. The Endometrial Microbiota: Challenges and Prospects.Medicina (Kaunas, Lithuania) · 2023
    Review
  18. Review
  19. Article
  20. Review

13 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

8 authors at 4 institutions in 2 countries.

Amy McMillanCanadian Centre for Human Microbiome and Probiotic Research, Lawson Health Research Institute, The University of Western Ontario, London, Ontario, Canada.
Stephen RulisaUniversity of Rwanda, and University Teaching Hospital of Kigali, Kigali, Rwanda.
Mark SumarahAgriculture and Agri-food Canada, London, Ontario, Canada.
Jean M MacklaimCanadian Centre for Human Microbiome and Probiotic Research, Lawson Health Research Institute, The University of Western Ontario, London, Ontario, Canada.
Justin RenaudAgriculture and Agri-food Canada, London, Ontario, Canada.
Jordan E BisanzCanadian Centre for Human Microbiome and Probiotic Research, Lawson Health Research Institute, The University of Western Ontario, London, Ontario, Canada.
Gregory B GloorDepartment of Biochemistry, The University of Western Ontario, London, Ontario, Canada.
Gregor ReidCanadian Centre for Human Microbiome and Probiotic Research, Lawson Health Research Institute, The University of Western Ontario, London, Ontario, Canada.
Western University · CAAgriculture and Agri-Food Canada · CALawson Health Research Institute · CACentre Hospitalier Universitaire de Kigali · RW

Funding

Canadian Institutes of Health Research
6 · The paper itself

Abstract

Bacterial vaginosis (BV) increases transmission of HIV, enhances the risk of preterm labour, and is associated with malodour. Clinical diagnosis often relies on microscopy, which may not reflect the microbiota composition accurately. We use an untargeted metabolomics approach, whereby we normalize the weight of samples prior to analysis, to obtained precise measurements of metabolites in vaginal fluid. We identify biomarkers for BV with high sensitivity and specificity (AUC = 0.99) in a cohort of 131 pregnant and non-pregnant Rwandan women, and demonstrate that the vaginal metabolome is strongly associated with bacterial diversity. Metabolites associated with high diversity and clinical BV include 2-hydroxyisovalerate and γ-hydroxybutyrate (GHB), but not succinate, which is produced by both Lactobacillus crispatus and BV-associated anaerobes in vitro. Biomarkers associated with high diversity and clinical BV are independent of pregnancy status, and were validated in a blinded replication cohort from Tanzania (n = 45), where we predicted clinical BV with 91% accuracy. Correlations between the metabolome and microbiota identified Gardnerella vaginalis as a putative producer of GHB, and we demonstrate production by this species in vitro. This work illustrates how changes in community structure alter the chemical composition of the vagina, and identifies highly specific biomarkers for a common condition.

Indexed as

MicrobiotaAdultBiodiversityBiomarkersFemaleGardnerella vaginalisHumansLactobacillusMetabolomicsMiddle AgedPregnancyRwandaSodium OxybateVaginaVaginosis, BacterialValerates2-hydroxyisovaleric acidBiomarkersSodium OxybateValerates

Identifiers

PMID26387596
PMCPMC4585667
OpenAlexW1921359935

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.