Altered intestinal microbiota associated with colorectal cancer

Study information

Reviewed Marked as Reviewed by Atrayees on 2023-7-19

study design

case-control

Citation

PMID PubMed identifier for scientific articles.

31250341

DOI Digital object identifier for electronic documents.

10.1007/s11684-019-0695-7

URI

Authors

Zhang H, Chang Y, Zheng Q, Zhang R, Hu C, Jia W

Journal

Frontiers of medicine

Year

2019

Keywords:

Devosia, Eubacterium, colorectal cancer (CRC), gut microbiota, intestinal

The gut microbiota plays an important role in the development and progression of colorectal cancer (CRC). To learn more about the dysbiosis of carcinogenesis, we assessed alterations in gut microbiota in patients with CRC. A total of 23 subjects were enrolled in this study: 9 had CRC (CRC group) and 14 had normal colons (normal group). The microbiome of the mucosal-luminal interface of each subject was sampled and analyzed using 16S rRNA gene amplicon sequencing. We also used Phylogenetic Investigation of Communities by Reconstruction of Unobserved States (PICRUSt) to predict microbial functional profiles. The microbial composition of the mucosal lumen differed between the groups, and the presence of specific bacteria may serve as a potential biomarker for colorectal carcinogenesis. We identified a significant reduction in Eubacterium, which is a butyrate-producing genera of bacteria, and a significant increase in Devosia in the gut microbiota of CRC patients. Different levels of gut microflora in healthy and CRC samples were identified. The observed abundance of bacterial species belonging to Eubacterium and Devosia may serve as a promising biomarker for the early detection of CRC.

Experiment 1

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Reviewed Marked as Reviewed by Atrayees on 2023-7-19

Curated date: 2021/01/10

Curator: WikiWorks

Revision editor(s): WikiWorks, Atrayees

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: Colorectal carcinoma

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: colorectal cancer

Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group: diagnosed only with colorectal cancer with endoscopy

Group 0 sample size Number of subjects in the control (unexposed) group: 14

Group 1 sample size Number of subjects in the case (exposed) group: 9

Antibiotics exclusion Number of days without antibiotics usage (if applicable) and other antibiotics-related criteria used to exclude participants (if any): 30 days

Lab analysis

Sequencing type: 16S

16S variable region One or more hypervariable region(s) of the bacterial 16S gene: V6

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

Alpha Diversity

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

Chao1 Abundance-based estimator of species richness: unchanged

Signature 1

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Curated date: 2021/01/10

Curator: Fatima Zohra

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Source: Figure 3, Supplementary table 2, table 2

Description: Altered intestinal microbiota associated with colorectal cancer

Abundance in Group 1: increased abundance in colorectal cancer

NCBI	Quality Control	Links
Hyphomicrobiaceae
Devosia
Hyphomicrobiales
Alphaproteobacteria
Paenibacillus
Paenibacillaceae
Chryseobacterium

Revision editor(s): WikiWorks

Signature 2

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Mark reviewed

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Curated date: 2021/01/10

Curator: Fatima Zohra

Revision editor(s): WikiWorks

Source: Figure 3, Supplementary table 2, table 2

Description: Altered intestinal microbiota associated with colorectal cancer

Abundance in Group 1: decreased abundance in colorectal cancer

NCBI	Quality Control	Links
Prevotellaceae
Prevotella
Clostridiaceae
Deltaproteobacteria
Desulfovibrionales
Eubacterium
Klebsiella
Leptotrichia
Phascolarctobacterium
Mogibacterium
Serratia

Revision editor(s): WikiWorks