Breast cancer in postmenopausal women is associated with an altered gut metagenome

Study information

Reviewed Marked as Reviewed by Fatima Zohra on 2021/02/09

study design

case-control

Citation

PMID PubMed identifier for scientific articles.

30081953

DOI Digital object identifier for electronic documents.

10.1186/s40168-018-0515-3

URI

Authors

Zhu J, Liao M, Yao Z, Liang W, Li Q, Liu J, Yang H, Ji Y, Wei W, Tan A, Liang S, Chen Y, Lin H, Zhu X, Huang S, Tian J, Tang R, Wang Q, Mo Z

Journal

Microbiome

Year

2018

Keywords:

Breast cancer, Gut microbiota, Immunity, Metabolism, Metagenomic analyses

BACKGROUND: Increasing evidence suggests that gut microbiota play a role in the pathogenesis of breast cancer. The composition and functional capacity of gut microbiota associated with breast cancer have not been studied systematically. METHODS: We performed a comprehensive shotgun metagenomic analysis of 18 premenopausal breast cancer patients, 25 premenopausal healthy controls, 44 postmenopausal breast cancer patients, and 46 postmenopausal healthy controls. RESULTS: Microbial diversity was higher in breast cancer patients than in controls. Relative species abundance in gut microbiota did not differ significantly between premenopausal breast cancer patients and premenopausal controls. In contrast, relative abundance of 45 species differed significantly between postmenopausal patients and postmenopausal controls: 38 species were enriched in postmenopausal patients, including Escherichia coli, Klebsiella sp_1_1_55, Prevotella amnii, Enterococcus gallinarum, Actinomyces sp. HPA0247, Shewanella putrefaciens, and Erwinia amylovora, and 7 species were less abundant in postmenopausal patients, including Eubacterium eligens and Lactobacillus vaginalis. Acinetobacter radioresistens and Enterococcus gallinarum were positively but weakly associated with expression of high-sensitivity C-reactive protein; Shewanella putrefaciens and Erwinia amylovora were positively but weakly associated with estradiol levels. Actinomyces sp. HPA0247 negatively but weakly correlated with CD3+CD8+ T cell numbers. Further characterization of metagenome functional capacity indicated that the gut metagenomes of postmenopausal breast cancer patients were enriched in genes encoding lipopolysaccharide biosynthesis, iron complex transport system, PTS system, secretion system, and beta-oxidation. CONCLUSION: The composition and functions of the gut microbial community differ between postmenopausal breast cancer patients and healthy controls. The gut microbiota may regulate or respond to host immunity and metabolic balance. Thus, while cause and effect cannot be determined, there is a reproducible change in the microbiota of treatment-naive patients relative to matched controls.

Experiment 1

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Reviewed Marked as Reviewed by Fatima Zohra on 2021/02/09

Curated date: 2021/01/10

Curator: WikiWorks

Revision editor(s): WikiWorks

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: Breast cancer breast cancer,breast tumor,cancer of breast,malignant breast neoplasm,malignant breast tumor,malignant neoplasm of breast,malignant neoplasm of the breast,malignant tumor of breast,malignant tumor of the breast,mammary cancer,mammary neoplasm,mammary tumor,primary breast cancer,Breast cancer

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

Group 1 name Corresponds to the case (exposed) group for case-control studies: Postmenopausal breast cancer patients

Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group: Postmenopausal breast cancer patients

Group 0 sample size Number of subjects in the control (unexposed) group: 46

Group 1 sample size Number of subjects in the case (exposed) group: 44

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: WMS

16S variable region One or more hypervariable region(s) of the bacterial 16S gene: Not specified

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

Statistical Analysis

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: increased

Richness Number of species: unchanged

Signature 1

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Reviewed Marked as Reviewed by Fatima Zohra on 2021/02/09

Curated date: 2021/01/10

Curator: Rimsha Azhar

Revision editor(s): WikiWorks

Source: Table 2 and Supplementary Table S4

Description: Relative abundance of the different species between postmenopausal breast cancer patients and postmenopausal healthy controls

Abundance in Group 1: increased abundance in Postmenopausal breast cancer patients

NCBI	Quality Control	Links
Escherichia coli
Shigella sonnei
Proteus mirabilis
Shigella boydii
Vibrio cholerae
Escherichia fergusonii
Shigella flexneri
Acinetobacter baumannii
Acinetobacter johnsonii
Providencia rettgeri
Limosilactobacillus mucosae
Porphyromonas uenonis
Fusobacterium nucleatum
Citrobacter koseri
Desulfovibrio piger
Enterococcus gallinarum
Salmonella enterica
Erwinia amylovora
Sodalis glossinidius
Acinetobacter radioresistens
Fusobacterium varium
Acidaminococcus intestini
Prevotella amnii
Yersinia enterocolitica
Anaerococcus vaginalis
Shewanella putrefaciens