Gut microbiota shifts in patients with gastric cancer in perioperative period
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Study information
-
Quality control
- Retracted paper
- Contamination issues suspected
- Batch effect issues suspected
- Uncontrolled confounding suspected
- Results are suspect (various reasons)
- Tags applied
study design
Citation
PMID PubMed identifier for scientific articles.
DOI Digital object identifier for electronic documents.
URI
Authors
Liang W, Yang Y, Wang H, Wang H, Yu X, Lu Y, Shen S, Teng L
Journal
Medicine
Year
2019
Gastric cancer (GC) is one of the common malignant tumors in China, with a high morbidity and mortality. With the development and application of high-throughput sequencing technologies and metagenomics, a great quantity of studies have shown that gastrointestinal microbiota is closely related to digestive system diseases. Although some studies have reported the effect of long-term follow-up after subtotal gastrectomy on intestinal flora changes in patients with GC. However, the features of gut microbiota and their shifts in patients with GC in perioperative period remain unclear.This study was designed to characterize fecal microbiota shifts of the patients with GC before and after the radical distal gastrectomy (RDG) during their hospital staying periods. Furthermore, fecal microbiota was also compared between the GC patients and healthy individuals.Patients who were diagnosed with advanced gastric adenocarcinoma at distal stomach were enrolled in the study. The bacterial burden within fecal samples was determined using quantitative polymerase chain reaction. To analyze the diversity and composition of gut microbiota from fecal DNA of 20 GC patients and 22 healthy controls, amplicons of the 16S rRNA gene from all subjects were pyrosequenced. To study gut microbiota shifts, the fecal microbiota from 6 GC patients before and after RDG was detected and subsequently analyzed. Short-chain fatty acids were also detected by chromatography spectrometer in these 6 GC patients.RDG had a moderate effect on bacterial richness and evenness, but had pronounced effects on the composition of postoperative gut microbiota compared with preoperative group. The relative abundances of genera Akkermansia, Esherichia/Shigella, Lactobacillus, and Dialister were significant changed in perioperative period. Remarkably, higher abundances of Escherichia/Shigella, Veillonella, and Clostridium XVIII and lower abundances of Bacteroides were observed in gut microbiota of overall GC patients compared to healthy controls.This study is the first study to characterize the altered gut microbiota within fecal samples from GC patients during perioperative period, and provide a new insights on such microbial perturbations as a potential effector of perioperative period phenotype. Further research must validate these discoveries and may evaluate targeted microbiota shifts to improve outcomes in GC patients.
Experiment 1
Reviewed Marked as Reviewed by Claregrieve1 on 2023/01/1
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
- 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
- controls
- Group 1 name Corresponds to the case (exposed) group for case-control studies
- gastric cancer
- Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group
- gastric cancer patients
- Group 0 sample size Number of subjects in the control (unexposed) group
- 22
- Group 1 sample size Number of subjects in the case (exposed) group
- 20
- Antibiotics exclusion Number of days without antibiotics usage (if applicable) and other antibiotics-related criteria used to exclude participants (if any)
- 1 month
Lab analysis
- Sequencing type
- 16S
- 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
- T-Test
- 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
- increased
- Simpson Estimator of species richness and species evenness: more weight on species evenness
- unchanged
- Richness Number of species
- increased
Signature 1
Reviewed Marked as Reviewed by Claregrieve1 on 2023/01/1
Source: Figure 2, Sup. figure 2A, Sup. figure 2B
Description: Comparision of gut microbiota between Gastric Cancer patients and Healthy Controls
Abundance in Group 1: increased abundance in gastric cancer
| NCBI | Quality Control | Links |
|---|---|---|
| Pseudomonadota | ||
| Enterobacteriaceae | ||
| Escherichia | ||
| Shigella | ||
| Clostridium | ||
| Veillonella | ||
| Gammaproteobacteria | ||
| Enterobacterales |
Revision editor(s): WikiWorks
Signature 2
Reviewed Marked as Reviewed by Claregrieve1 on 2023/01/1
Source: Figure 2, Sup. figure 2A, Sup. figure 2B
Description: Comparision of gut microbiota between Gastric Cancer patients and Healthy Controls
Abundance in Group 1: decreased abundance in gastric cancer
| NCBI | Quality Control | Links |
|---|---|---|
| Bacteroidota | ||
| Bacteroidaceae | ||
| Bacteroides | ||
| Bacteroidia | ||
| Bacteroidales |
Revision editor(s): WikiWorks
Experiment 2
Reviewed Marked as Reviewed by Claregrieve1 on 2023/01/1
Differences from previous experiment shown
Subjects
- Group 0 name Corresponds to the control (unexposed) group for case-control studies
- healthy gastric cancer (post surgery)
- Group 0 sample size Number of subjects in the control (unexposed) group
- 6
Lab analysis
Statistical Analysis
- Statistical test
- LEfSe
- LDA Score above Threshold for the linear discriminant analysis (LDA) score for studies using the popular LEfSe tool
- 3.5
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
Reviewed Marked as Reviewed by Claregrieve1 on 2023/01/1
Source: Figure 5
Description: LEfSe analysis of enriched bacterial taxa in gut microbiota between gastric cancer group and healthy gastric cancer group
Abundance in Group 1: increased abundance in gastric cancer
| NCBI | Quality Control | Links |
|---|---|---|
| Synergistota | ||
| Lachnospiraceae | ||
| Klebsiella |
Revision editor(s): WikiWorks
Signature 2
Reviewed Marked as Reviewed by Claregrieve1 on 2023/01/1
Source: Figure 5
Description: LEfSe analysis of enriched bacterial taxa in gut microbiota between gastric cancer group and healthy gastric cancer group
Abundance in Group 1: decreased abundance in gastric cancer
Revision editor(s): WikiWorks
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