Gut microbiota imbalance and its correlations with hormone and inflammatory factors in patients with stage 3/4 endometriosis

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Reviewed Marked as Reviewed by Folakunmi on 2024-2-20
study design
Citation
PMID PubMed identifier for scientific articles.
DOI Digital object identifier for electronic documents.
URI
Authors
Shan J, Ni Z, Cheng W, Zhou L, Zhai D, Sun S, Yu C
Journal
Archives of gynecology and obstetrics
Year
2021
Keywords:
Dysbiosis, Endometriosis, Estradiol, Gut microbiota, Inflammatory factors
Endometriosis (EM) in reproductive females has an incidence of 6-10% and greatly affects female fertility, quality of life, and long-term health. The gut microbiota can affect the physiological and pathological processes of humans through various pathways, such as those involving the nervous and endocrine systems and immunity, and it plays important roles in endocrine and inflammatory diseases. Whether the gut microbiota plays a role in EM has gradually attracted researchers' attention. In the present study, fecal and blood samples were collected from 12 patients with stage 3/4 EM and 12 healthy controls. We performed 16S rRNA high-throughput sequencing to compare the gut microbiota between the EM and control groups. Serum levels of hormones and inflammatory cytokines were measured. We found that compared with the control group, the EM group had a lower α diversity of gut microbiota and a higher Firmicutes/Bacteroidetes ratio. The abundances of various taxa (such as Actinobacteria, Tenericutes, Blautia, Bifidobacterium, Dorea, and Streptococcus) were significantly different between the two groups. The taxon with the highest abundance in the EM group was Prevotella_7, and that in the control group was Coprococcus_2. The serum levels of E2 and IL-8 were significantly higher in the EM group than in the control group (E2: EM group 74.7 ± 22.5 pg/L vs CON group 47.9 ± 12.5 pg/L; IL-8: EM group 6.39 ± 1.59 pg/mL vs CON group 4.14 ± 0.73 pg/mL). Additionally, the gut microbiota of the EM group was enriched for the microbial function categories environmental information processing, endocrine system, and immune system. Correlations were detected between each of Blautia and Dorea abundance and estradiol level and between Subdoligranulum abundance and IL-8 level. This study elucidated the associations between the gut microbiota and both serum hormones and inflammatory factors in EM. However, the findings need to be verified in future studies.

Experiment 1


Reviewed Marked as Reviewed by Folakunmi on 2024-2-20

Curated date: 2021/08/09

Curator: Samara.Khan

Revision editor(s): Samara.Khan, WikiWorks, Folakunmi

Subjects

Location of subjects
China
Host species Species from which microbiome was sampled. Contact us to have more species added.
Homo sapiens
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
Healthy controls
Group 1 name Corresponds to the case (exposed) group for case-control studies
Stage 3/4 endometriosis patients
Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group
Women were diagnosed with endometriosis via laparoscopic surgery and stages were categorized according to the revised American Society for Reproductive Medicine scoring system (r-ASRM).
Group 0 sample size Number of subjects in the control (unexposed) group
12
Group 1 sample size Number of subjects in the case (exposed) group
12
Antibiotics exclusion Number of days without antibiotics usage (if applicable) and other antibiotics-related criteria used to exclude participants (if any)
3 months

Lab analysis

Sequencing type
16S
16S variable region One or more hypervariable region(s) of the bacterial 16S gene
V3-V4
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
LEfSe
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)?
No
LDA Score above Threshold for the linear discriminant analysis (LDA) score for studies using the popular LEfSe tool
2

Alpha Diversity

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

Signature 1

Reviewed Marked as Reviewed by Folakunmi on 2024-2-20

Curated date: 2021/08/09

Curator: Samara.Khan

Revision editor(s): Samara.Khan, Folakunmi, Idiaru angela, Welile

Source: Figure 3

Description: Patients with endometriosis demonstrated a significantly higher abundance of the following taxa compared to control patients. There were 36 taxa unique to endometriosis patients that were completely absent in control patients. Some taxa were excluded because they had an unidentified genus/ species

Abundance in Group 1: increased abundance in Stage 3/4 endometriosis patients

NCBI Quality ControlLinks
Acidobacteriota
Actinomyces
Anaerobutyricum hallii
Bacteroidales
Blautia
Candidatus Saccharibacteria
Cetobacterium
Corynebacterium
Cyanobacteriota
Dorea
Eggerthella
Enterococcus
Granulicatella
Lactobacillus
Lactococcus
Mediterraneibacter gnavus
Mycobacterium
Pseudarthrobacter
Ruminiclostridium
Streptococcus
[Eubacterium] brachy
unclassified Blastocatellaceae
unclassified Prevotellaceae
unclassified Rhodobiaceae
Clostridium

Revision editor(s): Samara.Khan, Folakunmi, Idiaru angela, Welile

Signature 2

Reviewed Marked as Reviewed by Folakunmi on 2024-2-20

Curated date: 2021/08/09

Curator: Samara.Khan

Revision editor(s): Samara.Khan, Folakunmi

Source: Figure 3

Description: The following taxa were decreased in endometriosis patients and increased in the control group. There were 11 genera unique to the control group. Some taxa were excluded because they had an unidentified genus/ species

Abundance in Group 1: decreased abundance in Stage 3/4 endometriosis patients

NCBI Quality ControlLinks
Lachnospira
Lachnospira eligens
Lachnospiraceae bacterium NK4A136
Odoribacter
Parasutterella
Ruminococcus sp.
bacterium ND3007
unclassified Defluviitaleaceae
unclassified Ruminiclostridium
uncultured Oscillospiraceae bacterium
mollicutes_RF9mollicutes_RF9
uncultured Lachnospiraceae bacterium

Revision editor(s): Samara.Khan, Folakunmi