Increased Abundance of Clostridium and Fusobacterium in Gastric Microbiota of Patients with Gastric Cancer in Taiwan

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Reviewed Marked as Reviewed by Claregrieve1 on 2022/11/28
PMID PubMed identifier for scientific articles.
DOI Digital object identifier for electronic documents.
Hsieh YY, Tung SY, Pan HY, Yen CW, Xu HW, Lin YJ, Deng YF, Hsu WT, Wu CS, Li C
Scientific reports
Helicobacter pylori is recognised as a main risk factor for gastric cancer. However, approximately half of the patients with gastritis are negative for H. pylori infection, and the abundance of H. pylori decreases in patients with cancer. In the current study, we profiled gastric epithelium-associated bacterial species in patients with gastritis, intestinal metaplasia, and gastric cancer to identify additional potential pathogenic bacteria. The overall composition of the microbiota was similar between the patients with gastritis and those with intestinal metaplasia. H. pylori was present in half of the non-cancer group, and the dominant bacterial species in the H. pylori-negative patients were Burkholderia, Enterobacter, and Leclercia. The abundance of those bacteria was similar between the cancer and non-cancer groups, whereas the frequency and abundance of H. pylori were significantly lower in the cancer group. Instead, Clostridium, Fusobacterium, and Lactobacillus species were frequently abundant in patients with gastric cancer, demonstrating a gastric cancer-specific bacterial signature. A receiver operating characteristic curve analysis showed that Clostridium colicanis and Fusobacterium nucleatum exhibited a diagnostic ability for gastric cancer. Our findings indicate that the gastric microenvironment is frequently colonised by Clostridium and Fusobacterium in patients with gastric cancer.

Experiment 1

Reviewed Marked as Reviewed by Claregrieve1 on 2022/11/28

Curated date: 2021/01/10

Curator: WikiWorks

Revision editor(s): Claregrieve1, WikiWorks, Peace Sandy


Location of subjects
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
Stomach Anterior intestine,Gaster,Mesenteron,Stomach chamber,Ventriculus,Stomach,stomach
Condition The experimental condition / phenotype studied according to the Experimental Factor Ontology
Gastric cancer Ca body - stomach,ca greater curvature of stomach,Ca lesser curvature - stomach,cancer of stomach,gastric cancer,gastric cancer, intestinal,gastric neoplasm,malignant gastric neoplasm,malignant gastric tumor,malignant neoplasm of body of stomach,malignant neoplasm of lesser curve of stomach,malignant neoplasm of stomach,malignant neoplasm of the stomach,malignant stomach neoplasm,malignant tumor of body of stomach,malignant tumor of greater curve of stomach,malignant tumor of lesser curve of stomach,malignant tumor of stomach,malignant tumor of the stomach,stomach cancer,Gastric cancer
Group 0 name Corresponds to the control (unexposed) group for case-control studies
patients diagnosed with gastritis
Group 1 name Corresponds to the case (exposed) group for case-control studies
patients diagnosed with gastric cancer
Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group
Patients with gastric cancer
Group 0 sample size Number of subjects in the control (unexposed) group
Group 1 sample size Number of subjects in the case (exposed) group

Lab analysis

Sequencing type
16S variable region One or more hypervariable region(s) of the bacterial 16S gene
Sequencing platform Manufacturer and experimental platform used for quantifying microbial abundance

Statistical Analysis

Data transformation Data transformation applied to microbial abundance measurements prior to differential abundance testing (if any).
raw counts
Statistical test
Significance threshold p-value or FDR threshold used for differential abundance testing (if any)
MHT correction Have statistical tests be corrected for multiple hypothesis testing (MHT)?

Signature 1

Reviewed Marked as Reviewed by Claregrieve1 on 2022/11/28

Curated date: 2021/01/10

Curator: Valentina Pineda

Revision editor(s): Claregrieve1, WikiWorks

Source: Table 2

Description: Bacteria specifically found in patients with gastric cancer compared with the average counts in gastritis specimens

Abundance in Group 1: increased abundance in patients diagnosed with gastric cancer

NCBI Quality ControlLinks
Clostridium colicanis
Fusobacterium canifelinum
Fusobacterium nucleatum
Lactobacillus gasseri
Limosilactobacillus reuteri
Megasphaera micronuciformis
Prevotella intermedia
Segatella oris
Streptococcus gordonii
Streptococcus parasanguinis

Revision editor(s): Claregrieve1, WikiWorks