Dynamic microbe and molecule networks in a mouse model of colitis-associated colorectal cancer

From BugSigDB
Needs review
study design
Citation
PMID PubMed identifier for scientific articles.
DOI Digital object identifier for electronic documents.
Authors
Xujun Liang, Huiying Li, Geng Tian, Shao Li
Journal
Scientific Reports
Year
2014
Pages:
12
First page:
1
Keywords:
The role of bacterial colonization in the gut has been implicated in the progression of colitis-associated colorectal cancer (CAC); however, the dynamic shifts within the gut microbiota during colorectal carcinogenesis remain poorly understood. In this study, we analyze the longitudinal changes in the microbial community associated with CAC using a murine model treated with azoxymethane (AOM) and dextran sodium sulfate (DSS) to induce chronic colitis. High-throughput sequencing of the 16S rRNA gene (V3 region) was performed to compare the gut microbiota between AOM/DSS-treated and control mice. Our results demonstrate a significant alteration in microbial community structure due to chronic colitis, with an increase in species such as Streptococcus luteciae, Lactobacillus hamster, Bacteroides uniformis, and Bacteroides ovatus during colorectal cancer progression. Histological analysis revealed a molecular network of six key inflammation-to-cancer factors—p65, p53, COX-2, PPARγ, CCR2, and β-catenin—that correlated with microbiome shifts and contributed to the molecular pathogenesis of CAC. Phylotype changes were documented after each AOM/DSS cycle, and a longitudinal microbial network was constructed, highlighting complex, dynamic patterns in the microbiome. This study enhances our understanding of microbial shifts and microbe-host interactions in CAC and offers insights into the microbiota's potential role in cancer development.

Experiment 1


Needs review

Curated date: 2024/11/13

Curator: Wendy640

Revision editor(s): Wendy640

Subjects

Location of subjects
China
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
Colon Hindgut,Large bowel,Posterior intestine,Colon,colon
Condition The experimental condition / phenotype studied according to the Experimental Factor Ontology
Colorectal cancer cancer of colorectum,cancer of large bowel,cancer of large intestine,cancer of the large bowel,colon cancer,colorectal cancer,colorectum cancer,CRC,large intestine cancer,malignant colorectal neoplasm,malignant colorectal tumor,malignant colorectum neoplasm,malignant large bowel neoplasm,malignant large bowel tumor,malignant large intestine neoplasm,malignant large intestine tumor,malignant neoplasm of colorectum,malignant neoplasm of large bowel,malignant neoplasm of large intestine,malignant neoplasm of the large bowel,malignant neoplasm of the large intestine,malignant tumor of large bowel,malignant tumor of large intestine,malignant tumor of the large bowel,malignant tumor of the large intestine,Colorectal cancer
Group 0 name Corresponds to the control (unexposed) group for case-control studies
Control group
Group 1 name Corresponds to the case (exposed) group for case-control studies
AOM/DSS-treated group
Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group
Mice treated with AOM/DSS to induce chronic colitis and colorectal cancer
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
11

Lab analysis

Sequencing type
16S
16S variable region One or more hypervariable region(s) of the bacterial 16S gene
V3
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).
log transformation
Statistical test
edgeR
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
decreased
Chao1 Abundance-based estimator of species richness
unchanged
Simpson Estimator of species richness and species evenness: more weight on species evenness
decreased
Richness Number of species
unchanged

Signature 1

Needs review

Curated date: 2024/11/16

Curator: Wendy640

Revision editor(s): Wendy640

Source: Table S2, related to Fig. 4B

Description: Differential OTUs between control mice and AOM/DSS-treated mice, showing significant microbial shifts associated with colorectal cancer progression.

Abundance in Group 1: increased abundance in AOM/DSS-treated group

NCBI Quality ControlLinks
Bacteroides ovatus
Bacteroides uniformis
Oscillospira
[Clostridium] symbiosum
Streptococcus luteciaeStreptococcus luteciae
Lactobacillus hamsteri

Revision editor(s): Wendy640

Signature 2

Needs review

Curated date: 2024/11/19

Curator: Wendy640

Revision editor(s): Wendy640

Source: Table S2, Fig. 4B

Description: Differential OTUs between control mice and AOM/DSS-treated mice, showing significant microbial shifts associated with colorectal cancer progression.

Abundance in Group 1: decreased abundance in AOM/DSS-treated group

NCBI Quality ControlLinks
Oribacterium
Parabacteroides distasonis

Revision editor(s): Wendy640

Experiment 2


Needs review

Curated date: 2024/11/16

Curator: Wendy640

Revision editor(s): Wendy640

Differences from previous experiment shown

Subjects

Condition The experimental condition / phenotype studied according to the Experimental Factor Ontology
Colitis , Cancer Colitides,colitis,colitis (disease),colon inflammation,inflammation of colon,Colitis,CA,cancer,cell type cancer,malignancy,malignant Growth,malignant neoplasm,malignant neoplasm (disease),malignant neoplastic disease,malignant tumor,MT,neoplasm (disease), malignant,neoplasm, malignant,organ system cancer,primary cancer,Cancer
Group 0 name Corresponds to the control (unexposed) group for case-control studies
Mice with inflammation
Group 1 name Corresponds to the case (exposed) group for case-control studies
Mice with dysplasia/cancer
Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group
Mice treated with AOM and 1–2 DSS cycles

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

Signature 1

Needs review

Curated date: 2024/11/19

Curator: Wendy640

Revision editor(s): Wendy640

Source: Table S3

Description: OTUs distinguishing inflammation from colorectal cancer, highlighting taxa involved in cancer-related microbiome changes.

Abundance in Group 1: increased abundance in Mice with dysplasia/cancer

NCBI Quality ControlLinks
Faecalibacterium prausnitzii
Prevotella

Revision editor(s): Wendy640

Signature 2

Needs review

Curated date: 2024/11/18

Curator: Wendy640

Revision editor(s): Wendy640

Source: Table S3

Description: OTUs distinguishing inflammation from colorectal cancer, highlighting taxa involved in cancer-related microbiome changes.

Abundance in Group 1: decreased abundance in Mice with dysplasia/cancer

NCBI Quality ControlLinks
Muribaculaceae

Revision editor(s): Wendy640

Experiment 3


Needs review

Curated date: 2024/11/16

Curator: Wendy640

Revision editor(s): Wendy640

Differences from previous experiment shown

Subjects

Condition The experimental condition / phenotype studied according to the Experimental Factor Ontology
Colorectal cancer cancer of colorectum,cancer of large bowel,cancer of large intestine,cancer of the large bowel,colon cancer,colorectal cancer,colorectum cancer,CRC,large intestine cancer,malignant colorectal neoplasm,malignant colorectal tumor,malignant colorectum neoplasm,malignant large bowel neoplasm,malignant large bowel tumor,malignant large intestine neoplasm,malignant large intestine tumor,malignant neoplasm of colorectum,malignant neoplasm of large bowel,malignant neoplasm of large intestine,malignant neoplasm of the large bowel,malignant neoplasm of the large intestine,malignant tumor of large bowel,malignant tumor of large intestine,malignant tumor of the large bowel,malignant tumor of the large intestine,Colorectal cancer
Group 0 name Corresponds to the control (unexposed) group for case-control studies
control mice
Group 1 name Corresponds to the case (exposed) group for case-control studies
AOM/DSS Cycle 1 group
Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group
Mice treated with AOM/DSS cycle 1

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

Signature 1

Needs review

Curated date: 2024/11/18

Curator: Wendy640

Revision editor(s): Wendy640

Source: Table S4

Description: Differential OTUs after 1 cycle of AOM/DSS treatment, representing early microbial shifts during disease induction

Abundance in Group 1: increased abundance in AOM/DSS Cycle 1 group

NCBI Quality ControlLinks
Lactococcus
Parabacteroides
Streptococcus

Revision editor(s): Wendy640

Signature 3

Needs review

Curated date: 2024/11/18

Curator: Wendy640

Revision editor(s): Wendy640

Source: Table S4

Description: Differential OTUs after 1 cycle of AOM/DSS treatment, representing early microbial shifts during disease induction.

Abundance in Group 1: decreased abundance in AOM/DSS Cycle 1 group

NCBI Quality ControlLinks
Rikenella
[Clostridium] innocuum

Revision editor(s): Wendy640

Experiment 4


Needs review

Curated date: 2024/11/19

Curator: Wendy640

Revision editor(s): Wendy640

Differences from previous experiment shown

Subjects

Group 0 name Corresponds to the control (unexposed) group for case-control studies
Control group
Group 1 name Corresponds to the case (exposed) group for case-control studies
AOM/DSS Cycle 2 group
Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group
Mice treated with AOM/DSS cycle 2

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

Signature 1

Needs review

Curated date: 2024/11/19

Curator: Wendy640

Revision editor(s): Wendy640

Source: Table S4

Description: Differential OTUs after 2 cycles of AOM/DSS treatment, showing intermediate changes in the gut microbiota.

Abundance in Group 1: increased abundance in AOM/DSS Cycle 2 group

NCBI Quality ControlLinks
Escherichia coli
Streptococcus

Revision editor(s): Wendy640

Signature 2

Needs review

Curated date: 2024/11/19

Curator: Wendy640

Revision editor(s): Wendy640

Source: Table S4

Description: Differential OTUs after 2 cycles of AOM/DSS treatment, showing intermediate changes in the gut microbiota.

Abundance in Group 1: decreased abundance in AOM/DSS Cycle 2 group

NCBI Quality ControlLinks
Roseburia faecis
Flexithrix dorotheae

Revision editor(s): Wendy640

Experiment 5


Needs review

Curated date: 2024/11/19

Curator: Wendy640

Revision editor(s): Wendy640

Differences from previous experiment shown

Subjects

Group 0 name Corresponds to the control (unexposed) group for case-control studies
Control Group
Group 1 name Corresponds to the case (exposed) group for case-control studies
AOM/DSS Cycle 3 group
Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group
Mice treated with AOM/DSS cycle 3

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

Signature 1

Needs review

Curated date: 2024/11/19

Curator: Wendy640

Revision editor(s): Wendy640

Source: Table S4

Description: Differential OTUs after 3 cycles of AOM/DSS treatment, indicating microbial changes at advanced disease stages.

Abundance in Group 1: increased abundance in AOM/DSS Cycle 3 group

NCBI Quality ControlLinks
Lactococcus
[Clostridium] symbiosum

Revision editor(s): Wendy640

Signature 2

Needs review

Curated date: 2024/11/19

Curator: Wendy640

Revision editor(s): Wendy640

Source: Table S4

Description: Differential OTUs after 3 cycles of AOM/DSS treatment, indicating microbial changes at advanced disease stages.

Abundance in Group 1: decreased abundance in AOM/DSS Cycle 3 group

NCBI Quality ControlLinks
Lachnospira
Oxobacter

Revision editor(s): Wendy640

Experiment 6


Needs review

Curated date: 2024/11/19

Curator: Wendy640

Revision editor(s): Wendy640

Differences from previous experiment shown

Subjects

Group 1 name Corresponds to the case (exposed) group for case-control studies
AOM/DSS Cycle 4 group
Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group
Mice treated with AOM/DSS cycle 4

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

Signature 1

Needs review

Curated date: 2024/11/19

Curator: Wendy640

Revision editor(s): Wendy640

Source: Table S4

Description: Differential OTUs after 4 cycles of AOM/DSS treatment, representing microbiota alterations during late-stage colorectal cancer.

Abundance in Group 1: increased abundance in AOM/DSS Cycle 4 group

NCBI Quality ControlLinks
Bacteroides ovatus
Oscillospira

Revision editor(s): Wendy640

Signature 2

Needs review

Curated date: 2024/11/19

Curator: Wendy640

Revision editor(s): Wendy640

Source: Table S4

Description: Differential OTUs after 4 cycles of AOM/DSS treatment, representing microbiota alterations during late-stage colorectal cancer.

Abundance in Group 1: decreased abundance in AOM/DSS Cycle 4 group

NCBI Quality ControlLinks
Anaerostipes
Helicobacter

Revision editor(s): Wendy640