Comparative analysis of racial differences in breast tumor microbiome

From BugSigDB
Reviewed Marked as Reviewed by Chloe on 2022/03/15
study design
Citation
PMID PubMed identifier for scientific articles.
DOI Digital object identifier for electronic documents.
Authors
Thyagarajan S, Zhang Y, Thapa S, Allen MS, Phillips N, Chaudhary P, Kashyap MV, Vishwanatha JK
Journal
Scientific reports
Year
2020
Studies have demonstrated that environmental, host genetic, and socioeconomic factors influence the breast cancer prevalence landscape with a far-reaching influence on racial disparity to subtypes of breast cancer. To understand whether breast tissue harbors race-specific microbiota, we performed 16S rRNA gene-based sequencing of retrospective tumor and matched normal tissue adjacent to tumor (NAT) samples collected from Black non-Hispanic (BNH) and White non-Hispanic (WNH) women. Analysis of Triple Negative Breast cancer (TNBC) and Triple Positive Breast Cancer (TPBC) tissues for microbiota composition revealed significant differences in relative abundance of specific taxa at both phylum and genus levels between WNH and BNH women cohorts. Our main findings are that microbial diversity as measured by Shannon index was significantly lower in BNH TNBC tumor tissue as compared to matched NAT zone. In contrast, the WNH cohort had an inverse pattern for the Shannon index, when TNBC tumor tissue was compared to the matched NAT. Unweighted Principle Coordinates Analysis (PCoA) revealed a distinct clustering of tumor and NAT microbiota in both BNH and WNH cohorts.

Experiment 1


Reviewed Marked as Reviewed by Chloe on 2022/03/15

Curated date: 2021/07/22

Curator: Itslanapark

Revision editor(s): Itslanapark, WikiWorks, Victoria

Subjects

Location of subjects
United States of America
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
Breast Mamma,Mammary part of chest,Mammary region,Breast,breast
Condition The experimental condition / phenotype studied according to the Experimental Factor Ontology
Neoplasm cell process disease,disease of cellular proliferation,neoplasia,neoplasm,neoplasm (disease),neoplastic disease,neoplastic growth,other neoplasm,tumor,tumor disease,Neoplasm
Group 0 name Corresponds to the control (unexposed) group for case-control studies
BNH with TNBC normal tissue
Group 1 name Corresponds to the case (exposed) group for case-control studies
BNH with TNBC tumor tissue
Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group
Tumor tissue from black non-hispanic patients with triple negative breast cancer
Group 0 sample size Number of subjects in the control (unexposed) group
7
Group 1 sample size Number of subjects in the case (exposed) group
7
Antibiotics exclusion Number of days without antibiotics usage (if applicable) and other antibiotics-related criteria used to exclude participants (if any)
Biorepository information revealed that no patients were treated with antibiotics prior to tissue sample collection, however duration window of non-exposure was unidentified.

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
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)?
No

Alpha Diversity

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

Signature 1

Reviewed Marked as Reviewed by Chloe on 2022/03/15

Curated date: 2021/07/26

Curator: Itslanapark

Revision editor(s): Chloe, Itslanapark

Source: Figure 6a

Description: Microbiota relative abundance at phylum (a, b, d) and genus (c,e) levels showed differences between tumor and normal tissue in both triple negative breast cancer and triple positive breast cancer patients using Wilcoxon Signed Rank Test.

Abundance in Group 1: decreased abundance in BNH with TNBC tumor tissue

NCBI Quality ControlLinks
Actinomycetota
unclassified Bradyrhizobiaceae

Revision editor(s): Chloe, Itslanapark

Experiment 2


Reviewed Marked as Reviewed by Chloe on 2022/03/15

Curated date: 2021/07/22

Curator: Itslanapark

Revision editor(s): Itslanapark, WikiWorks, Victoria

Differences from previous experiment shown

Subjects

Group 0 name Corresponds to the control (unexposed) group for case-control studies
WNH with TNBC normal tissue
Group 1 name Corresponds to the case (exposed) group for case-control studies
WNH with TNBC normal tissue
Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group
Tumor tissue from white non-hispanic patients with triple negative breast cancer
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
6

Lab analysis

Statistical Analysis

Alpha Diversity

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

Signature 1

Reviewed Marked as Reviewed by Chloe on 2022/03/15

Curated date: 2021/07/26

Curator: Itslanapark

Revision editor(s): Itslanapark

Source: Figure 6

Description: Microbiota relative abundance at phylum (a, b, d) and genus (c,e) levels showed differences between tumor and normal tissue in both triple negative breast cancer and triple positive breast cancer patients using Wilcoxon Signed Rank Test.

Abundance in Group 1: increased abundance in WNH with TNBC normal tissue

NCBI Quality ControlLinks
Bacteroidota

Revision editor(s): Itslanapark

Experiment 3


Reviewed Marked as Reviewed by Chloe on 2022/03/15

Curated date: 2021/07/22

Curator: Itslanapark

Revision editor(s): Itslanapark, WikiWorks, Victoria

Differences from previous experiment shown

Subjects

Group 0 name Corresponds to the control (unexposed) group for case-control studies
WNH with TNBC normal tissue (second set)
Group 1 name Corresponds to the case (exposed) group for case-control studies
WNH with TNBC normal tissue (second set)
Group 0 sample size Number of subjects in the control (unexposed) group
10
Group 1 sample size Number of subjects in the case (exposed) group
10

Lab analysis

Statistical Analysis

Alpha Diversity

Shannon Estimator of species richness and species evenness: more weight on species richness
increased
Chao1 Abundance-based estimator of species richness
increased
Richness Number of species
increased

Experiment 4


Reviewed Marked as Reviewed by Chloe on 2022/03/15

Curated date: 2021/07/22

Curator: Itslanapark

Revision editor(s): Itslanapark, WikiWorks, Victoria

Differences from previous experiment shown

Subjects

Group 0 name Corresponds to the control (unexposed) group for case-control studies
TPBC normal tissue
Group 1 name Corresponds to the case (exposed) group for case-control studies
TPBC tumor tissue
Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group
Tumor tissue from patients with triple positive breast cancer

Lab analysis

Statistical Analysis

Alpha Diversity

Chao1 Abundance-based estimator of species richness
increased

Signature 1

Reviewed Marked as Reviewed by Chloe on 2022/03/15

Curated date: 2021/07/26

Curator: Itslanapark

Revision editor(s): Itslanapark

Source: Table 6

Description: Microbiota relative abundance at phylum (a, b, d) and genus (c,e) levels showed differences between tumor and normal tissue in both triple negative breast cancer and triple positive breast cancer patients using Wilcoxon Signed Rank Test.

Abundance in Group 1: increased abundance in TPBC tumor tissue

NCBI Quality ControlLinks
Fusobacteriota
Streptococcus

Revision editor(s): Itslanapark

Experiment 5


Reviewed Marked as Reviewed by Chloe on 2022/03/15

Curated date: 2021/07/26

Curator: Itslanapark

Revision editor(s): WikiWorks, LGeistlinger, Chloe, Itslanapark, Victoria

Differences from previous experiment shown

Subjects

Condition The experimental condition / phenotype studied according to the Experimental Factor Ontology
Ethnic group Ethnicity,race,Ethnic group,ethnic group
Group 0 name Corresponds to the control (unexposed) group for case-control studies
WNH
Group 1 name Corresponds to the case (exposed) group for case-control studies
BNH
Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group
Normal tissue from black non-hispanic patients with breast cancer
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
7

Lab analysis

Statistical Analysis

Alpha Diversity

Shannon Estimator of species richness and species evenness: more weight on species richness
increased
Chao1 Abundance-based estimator of species richness
unchanged
Simpson Estimator of species richness and species evenness: more weight on species evenness
increased

Signature 1

Reviewed Marked as Reviewed by Chloe on 2022/03/15

Curated date: 2021/07/26

Curator: Itslanapark

Revision editor(s): Itslanapark

Source: Figure 8

Description: Relative abundance of taxa showed differences between BNH and WNH at the genus (a, b) and phylum (c) levels in TNBC (a, c) and TPBC (b) patients, significance analyzed using a Wilcoxon Rank Sum Test.

Abundance in Group 1: increased abundance in BNH

NCBI Quality ControlLinks
Planococcaceae

Revision editor(s): Itslanapark

Signature 2

Reviewed Marked as Reviewed by Chloe on 2022/03/15

Curated date: 2021/07/26

Curator: Itslanapark

Revision editor(s): Itslanapark

Source: Figure 8

Description: Relative abundance of taxa showed differences between BNH and WNH at the genus (a, b) and phylum (c) levels in TNBC (a, c) and TPBC (b) patients, significance analyzed using a Wilcoxon Rank Sum Test.

Abundance in Group 1: decreased abundance in BNH

NCBI Quality ControlLinks
Phenylobacterium

Revision editor(s): Itslanapark

Experiment 6


Reviewed Marked as Reviewed by Chloe on 2022/03/15

Curated date: 2021/07/26

Curator: Itslanapark

Revision editor(s): WikiWorks, LGeistlinger, Itslanapark, Victoria

Differences from previous experiment shown

Subjects

Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group
Tumor tissue from black non-hispanic patients with breast cancer

Lab analysis

Statistical Analysis

Alpha Diversity

Shannon Estimator of species richness and species evenness: more weight on species richness
decreased
Chao1 Abundance-based estimator of species richness
decreased
Richness Number of species
decreased

Signature 1

Reviewed Marked as Reviewed by Chloe on 2022/03/15

Curated date: 2021/07/27

Curator: Itslanapark

Revision editor(s): Itslanapark

Source: Figure 8

Description: Relative abundance of taxa showed differences between BNH and WNH at the genus (a, b) and phylum (c) levels in TNBC (a, c) and TPBC (b) patients, significance analyzed using a Wilcoxon Rank Sum Test.

Abundance in Group 1: increased abundance in BNH

NCBI Quality ControlLinks
Veillonella
Phyllobacterium

Revision editor(s): Itslanapark

Signature 2

Reviewed Marked as Reviewed by Chloe on 2022/03/15

Curated date: 2021/07/27

Curator: Itslanapark

Revision editor(s): Itslanapark, Atrayees

Source: Figure 8

Description: Relative abundance of taxa showed differences between BNH and WNH at the genus (a, b) and phylum (c) levels in TNBC (a, c) and TPBC (b) patients, significance analyzed using a Wilcoxon Rank Sum Test.

Abundance in Group 1: decreased abundance in BNH

NCBI Quality ControlLinks
Lactobacillus
Phenylobacterium
unclassified Bradyrhizobiaceae
unclassified Caulobacteraceae

Revision editor(s): Itslanapark, Atrayees