The gut microbiota in conventional and serrated precursors of colorectal cancer/Experiment 3

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Reviewed Marked as Reviewed by Shaimaa Elsafoury on 2021/02/09

Curated date: 2021/01/10

Curator: WikiWorks

Revision editor(s): WikiWorks, ChiomaBlessing

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

Curated date: 2021/01/10

Curator: Levi Waldron

Revision editor(s): WikiWorks

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 ControlLinks
Erysipelotrichia
Gammaproteobacteria

Revision editor(s): WikiWorks