Effect of endometriosis on the fecal bacteriota composition of mice during the acute phase of lesion formation

Study information

Reviewed Marked as Reviewed by Claregrieve1 on 2022/11/7

study design

laboratory experiment

Citation

PMID PubMed identifier for scientific articles.

31887116

DOI Digital object identifier for electronic documents.

10.1371/journal.pone.0226835

URI

Authors

Hantschel J, Weis S, Schäfer KH, Menger MD, Kohl M, Egert M, Laschke MW

Journal

PloS one

Year

2019

Accumulating evidence indicates that there is an interaction between the gut microbiota and endometriotic lesions. The new formation of these lesions is associated with stem cell recruitment, angiogenesis and inflammation, which may affect the composition of the gut microbiota. To test this hypothesis, we herein induced endometriotic lesions by transplantation of uterine tissue fragments from green fluorescent protein (GFP)+ donor mice into the peritoneal cavity of GFP- C57BL/6 wild-type mice. Sham-transplanted animals served as controls. Fecal pellets of the animals were collected 3 days before as well as 7 and 21 days after the induction of endometriosis to analyze the composition of the gut microbiota by means of 16S ribosomal RNA gene sequencing. The transplantation of uterine tissue fragments resulted in the establishment of endometriotic lesions in all analyzed mice. These lesions exhibited a typical histomorphology with endometrial glands surrounded by a vascularized stroma. Due to their bright GFP signal, they could be easily differentiated from the surrounding GFP- host tissue. Bacterial 16S rRNA genes were successfully PCR-amplified from the DNA extracts of all obtained mice fecal samples. However, no significant effect of endometriosis induction on the composition of the bacterial microbiota was detected with our experimental setup. Our findings allow careful speculation that endometriosis in mice does not induce pronounced dysbiosis during the acute phase of lesion formation.

Experiment 1

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Reviewed Marked as Reviewed by Claregrieve1 on 2022/11/7

Curated date: 2021/08/11

Curator: Samara.Khan

Revision editor(s): Samara.Khan, Claregrieve1, WikiWorks, Aiyshaaaa

Subjects

Location of subjects: United States of America

Host species Species from which microbiome was sampled. Contact us to have more species added.: Mus musculus

Body site Anatomical site where microbial samples were extracted from according to the Uber Anatomy Ontology: Feces Cow dung,Cow pat,Droppings,Dung,Excrement,Excreta,Faeces,Fecal material,Fecal matter,Fewmet,Frass,Guano,Matières fécales@fr,Merde@fr,Ordure,Partie de la merde@fr,Piece of shit,Porción de mierda@es,Portion of dung,Portion of excrement,Portion of faeces,Portion of fecal material,Portion of fecal matter,Portion of feces,Portion of guano,Portion of scat,Portionem cacas,Scat,Spoor,Spraint,Stool,Teil der fäkalien@de,Feces,feces

Condition The experimental condition / phenotype studied according to the Experimental Factor Ontology: Endometriosis endometriosis,Endometriosis (clinical),endometriosis (disease),Endometriosis (disorder),Endometriosis (morphologic abnormality),ENDOMETRIOSIS NEC,Endometriosis NOS,Endometriosis NOS (disorder),Endometriosis of other specified sites,Endometriosis, site unspecified,Endometriosis

Group 0 name Corresponds to the control (unexposed) group for case-control studies: Sham(Healthy controls)

Group 1 name Corresponds to the case (exposed) group for case-control studies: Endometriosis mice

Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group: Mice for whom endometrial tissue was transplanted into the peritoneal cavity to simulate endometriosis. The sample was taken 3 days before the transplantation of uterine tissue fragments

Group 0 sample size Number of subjects in the control (unexposed) group: 6

Group 1 sample size Number of subjects in the case (exposed) group: 8

Antibiotics exclusion Number of days without antibiotics usage (if applicable) and other antibiotics-related criteria used to exclude participants (if any): None were given prior to the start of the experiment

Lab analysis

Sequencing type: 16S

16S variable region One or more hypervariable region(s) of the bacterial 16S gene: V4-V5

Sequencing platform Manufacturer and experimental platform used for quantifying microbial abundance: Illumina

Statistical Analysis

Data transformation Data transformation applied to microbial abundance measurements prior to differential abundance testing (if any).: relative abundances

Statistical test: Mann-Whitney (Wilcoxon)

Significance threshold p-value or FDR threshold used for differential abundance testing (if any): 0.05

MHT correction Have statistical tests be corrected for multiple hypothesis testing (MHT)?: Yes

Alpha Diversity

Shannon Estimator of species richness and species evenness: more weight on species richness: unchanged

Chao1 Abundance-based estimator of species richness: unchanged

Simpson Estimator of species richness and species evenness: more weight on species evenness: unchanged

Richness Number of species: unchanged

Experiment 2

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Reviewed Marked as Reviewed by Folakunmi on 2024-2-1

Curated date: 2023/04/18

Curator: Aiyshaaaa

Revision editor(s): Aiyshaaaa

Differences from previous experiment shown

Subjects

Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group: Mice for whom endometrial tissue was transplanted into the peritoneal cavity to simulate endometriosis. The sample was taken 7 days after the induction of endometriosis (after EI).

Group 0 sample size Number of subjects in the control (unexposed) group: 8

Lab analysis

Statistical Analysis

Alpha Diversity

Shannon Estimator of species richness and species evenness: more weight on species richness: unchanged

Chao1 Abundance-based estimator of species richness: unchanged

Simpson Estimator of species richness and species evenness: more weight on species evenness: unchanged

Richness Number of species: unchanged

Experiment 3

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Your review change was submittedDuplicate this Experiment Add a new Signature

Reviewed Marked as Reviewed by Folakunmi on 2024-2-1

Curated date: 2023/04/18

Curator: Aiyshaaaa

Revision editor(s): Aiyshaaaa

Differences from previous experiment shown

Subjects

Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group: Mice for whom endometrial tissue was transplanted into the peritoneal cavity to simulate endometriosis. The sample was taken 21 days after the induction of endometriosis (after EI).