Cited by 418Ovarian function and disordersGut microbiota and healthGastrointestinal motility and disorders

Alterations in Gut Microbiome Composition and Barrier Function Are Associated with Reproductive and Metabolic Defects in Women with Polycystic Ovary Syndrome (PCOS): A Pilot Study

Open access
Lindheim, Lisa, Bashir, Mina, Münzker, Julia, Trummer, Christian, Zachhuber, Verena, Leber, Bettina, Horvath, Angela, Pieber, Thomas R. +3 more·2017·PLOS ONE

Abstract

BACKGROUND: Polycystic ovary syndrome (PCOS) is a common female endocrinopathy of unclear origin characterized by hyperandrogenism, oligo-/anovulation, and ovarian cysts. Women with PCOS frequently display overweight, insulin resistance, and systemic low-grade inflammation. We hypothesized that endotoxemia resulting from a leaky gut is associated with inflammation, insulin resistance, fat accumulation, and hyperandrogenemia in PCOS. In this pilot study, we compared the stool microbiome, gut permeability, and inflammatory status of women with PCOS and healthy controls. METHODS: 16S rRNA gene amplicon sequencing was performed on stool samples from 24 PCOS patients and 19 healthy controls. Data processing and microbiome analysis were conducted in mothur and QIIME using different relative abundance cut-offs. Gut barrier integrity, endotoxemia, and inflammatory status were evaluated using serum and stool markers and associations with reproductive, metabolic, and anthropometric parameters were investigated. RESULTS: The stool microbiome of PCOS patients showed a lower diversity and an altered phylogenetic composition compared to controls. We did not observe significant differences in any taxa with a relative abundance>1%. When looking at rare taxa, the relative abundance of bacteria from the phylum Tenericutes, the order ML615J-28 (phylum Tenericutes) and the family S24-7 (phylum Bacteroidetes) was significantly lower and associated with reproductive parameters in PCOS patients. Patients showed alterations in some, but not all markers of gut barrier function and endotoxemia. CONCLUSION: Patients with PCOS have a lower diversity and an altered phylogenetic profile in their stool microbiome, which is associated with clinical parameters. Gut barrier dysfunction and endotoxemia were not driving factors in this patient cohort, but may contribute to the clinical phenotype in certain PCOS patients.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1371/journal.pone.0168390

Cites

49 of 49 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • The microbiomes of individuals with PCOS have generally been found to have lower alpha diversity than controls, and most studies describe an altered composition of taxa relative to controls.

    “Similar to microbiomes associated with obesity, the microbiomes of individuals with PCOS have generally been found to have lower alpha diversity (lower numbers of bacterial taxa) than controls, and most studies describe an altered composition of taxa relative to controls [140,143].”

    From Polycystic Ovary Syndrome: An Evolutionary Adaptation to Lifestyle and the Environment (2022) · cites this paper as [143]

    The Results (‘Characterizing the stool microbiome in PCOS’; page not available) report approximately 15% lower alpha diversity in PCOS patients than controls, as well as differences in rare taxa. The Discussion reports a shift in microbiome composition but describes this as a pilot study providing a first description in women with PCOS. It does not establish that these findings hold generally or that most studies report altered taxa. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • Dysbiosis has consistently been found to correlate with different physiological parameters, such as obesity, sex hormones and metabolic defects, although most studies are small.

    “Although most studies are small, dysbiosis has consistently been found to correlate with different physiological parameters, such as obesity, sex hormones and metabolic defects [140,141,143].”

    From Polycystic Ovary Syndrome: An Evolutionary Adaptation to Lifestyle and the Environment (2022) · cites this paper as [143]

    The Results report associations between bacterial taxa and serum androgens, and the Discussion describes this as a small pilot study. The Introduction reports an association between the gut microbiome and obesity, but the Discussion says this study found no significant microbiome differences attributable to BMI or insulin sensitivity and that microbiome patterns in obesity vary across studies. Thus, the source does not support the claim of consistent correlations across all the listed parameters. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • Dysbiosis is a consistent finding in the microbiome of women with PCOS.

    “Dysbiosis is a consistent finding when looking at the microbiome of women with PCOS [140,141,142,143].”

    From Polycystic Ovary Syndrome: An Evolutionary Adaptation to Lifestyle and the Environment (2022) · cites this paper as [143]

    The Discussion reports lower microbial diversity and shifts in the stool microbiome profile of women with PCOS compared with controls, supporting an association with dysbiosis in this cohort. But it calls this a pilot study and the first description of the stool microbiome in women with PCOS; it cannot establish that dysbiosis is a consistent finding across studies or cohorts. (LLM, conf=0.85)

    Experimental — accuracy not yet measured
  • Alternative mechanisms of the pathogenesis of prediabetes and T2D in subjects with PCOS are muscle mitochondrial dysfunction and the gut microbiome.

    “Alternative mechanisms of the pathogenesis of prediabetes and T2D in subjects with PCOS are muscle mitochondrial dysfunction [28] and the gut microbiome [29].”
  • All diets that aim to reduce weight are considered beneficial.

    “However, all diets that aim to reduce weight are considered beneficial [29].”

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

1 of the 50 references couldn’t be matched to a known paper.

Cited by

Sorted by citations

Authors
Lindheim, L., Bashir, M., Münzker, J., Trummer, C., Zachhuber, V., Leber, B., Horvath, A., Pieber, T. R., Gorkiewicz, G., Stadlbauer, V., & Obermayer-Pietsch, B.
Affiliations
  • Medical University of Graz (AT)
  • University of Graz (AT)
Corresponding author
Lindheim, Lisa
Venue
PLOS ONE
Published
2017-01-03
Volume
12
Issue
1
Pages
e0168390
ISSN
1932-6203 (ISSN-L)
OpenAlex
W2568515092
Cited by
416
References
50
Citations by year
2026: 51 · 2025: 43 · 2024: 55 · 2023: 70 · 2022: 52 · 2021: 56 · 2020: 44 · 2019: 23 · 2018: 18 · 2017: 3
FWCI
27.94
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Figshare (submittedVersion, cc-by)
Funders
Austrian Science Fund (W1241)
Topics
  • Health Sciences › Medicine › Reproductive Medicine › Ovarian function and disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
  • Health Sciences › Medicine › Gastroenterology › Gastrointestinal motility and disorders
Keywords
polycystic ovary syndrome, gut microbiota, intestinal barrier, endotoxemia, intestinal permeability, microbial diversity, Tenericutes, Bacteroidetes, S24-7, inflammation, insulin resistance, hyperandrogenemia, reproductive disorders, metabolic defects
MeSH terms
Gastrointestinal Microbiome, Adult, Anthropometry, Feces, Female, Humans, Inflammation, Tenericutes, Pilot Projects, Polycystic Ovary Syndrome, Surveys and Questionnaires, RNA, Ribosomal, 16S, Case-Control Studies, Principal Component Analysis, Bacteroidetes, Real-Time Polymerase Chain Reaction

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review