The gut microbiota in conventional and serrated precursors of colorectal cancer/Experiment 3
From BugSigDB
Reviewed Marked as Reviewed by Shaimaa Elsafoury on 2021/02/09
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
- 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
- Colon Sessile Serrated Adenoma/Polyp colon sessile serrated adenoma,colon sessile serrated adenoma/polyp,colon sessile serrated polyp,colon SSA,colon SSA/P,colon SSP,sessile serrated adenoma,Colon Sessile Serrated Adenoma/Polyp,colon Sessile Serrated Adenoma/Polyp
- 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
- Sessile serrated adenoma cases
- Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group
- conventional adenoma cases; those with at least one tubular or tubulovillous adenoma and no other polyps of hyperplastic, SSA, or unclassified histology. HP cases; having at least one HP, with no other polyps of tubular, tubulovillous, SSA, or unclassified histology. SSA cases; having at least one SSA, with or without HP(s), and with no other polyps of tubular, tubulovillous, or unclassified histology. Proximal polyps; polyps located in the cecum, ascending colon, hepatic flexure, transverse colon, or splenic flexure. Distal polyps; polyps located in the descending colon, sigmoid colon, or rectum.
- Group 0 sample size Number of subjects in the control (unexposed) group
- 323
- Group 1 sample size Number of subjects in the case (exposed) group
- 33
- Antibiotics exclusion Number of days without antibiotics usage (if applicable) and other antibiotics-related criteria used to exclude participants (if any)
- NYU included who had not been on long-term antibiotic treatment
Lab analysis
- Sequencing type
- 16S
- 16S variable region One or more hypervariable region(s) of the bacterial 16S gene
- 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).
- raw counts
- Statistical test
- DESeq2
- Significance threshold p-value or FDR threshold used for differential abundance testing (if any)
- 0.1
- MHT correction Have statistical tests be corrected for multiple hypothesis testing (MHT)?
- Yes
- Confounders controlled for Confounding factors that have been accounted for by stratification or model adjustment
- age, body mass index, sex
Alpha Diversity
- Shannon Estimator of species richness and species evenness: more weight on species richness
- unchanged
- Richness Number of species
- unchanged
Signature 1
Reviewed Marked as Reviewed by Shaimaa Elsafoury on 2021/02/09
Source: Table 2 + Supplemental Table S5 + S3+ S4
Description: Differential abundance was detected by the “DESeq” function in the DESeq2 package. All classes and genera with an FDR-adjusted q < 0.10 are included in the table. Models were adjusted for sex, age, study, and categorical BMI. See Additional file 1: Table S5 for comparisons at the phylum, order, and family level
Abundance in Group 1: decreased abundance in Sessile serrated adenoma cases
| NCBI | Quality Control | Links |
|---|---|---|
| Erysipelotrichia | ||
| Gammaproteobacteria |
Revision editor(s): WikiWorks
