GSE46451

Effects of Inflammation and 5-ASA on ex vivo cultured ulcerative colitis biopsies

Whole-study status Not suitable

Dataset does not meet the current suitability threshold.

Whole-study downloads — these do not apply your sample requirements.

Selected cohort requirements

Samples meeting selected requirements: 0 cases / 0 controls

View matching samples

6 case / 6 control samples elsewhere in the study have incomplete or conflicting evidence; they are not included above

Patient pairs verified in indexed sample metadata: 0

A case/control comparison meeting these requirements is not confirmed.

Counts describe samples, not independent patients. Pair verification uses explicit subject identifiers in indexed sample metadata. Zero verified pairs does not establish that the study is unpaired; reported matched-normal design alone is insufficient.

Summary

To seek effects of inflammatory status and 5-aminosalicylic acid (5-ASA, mesalazine) exposure ex vivo on mRNA levels within rectal mucosal biopsies from patients with ulcerative colitis.

Overall design

A total of 12 biopsies were analysed, 3 biological replicates in each of 4 categories (inflamed with or without 5-ASA, non-inflamed with or without 5-ASA).

Source Evidence

4 sources
Source Contribution Status
GEO

Original dataset metadata, sample metadata, source links, and GEO data availability flags.

Sample records
12 GSM samples
Primary source
recount3

Planned trusted source for processed count availability.

No match found
Expression Atlas

Planned source for curated expression experiment links.

No match found
PubMed

Publication context when PubMed identifiers are already known.

No match found

Metadata Quality Components

Analysis Readiness

Ready after review
97% DE readiness

Contrast completeness

25/25 pts

Both case and control groups are present in the proposed grouping.

Minimum group size

20/20 pts

Each contrast group has at least 2 samples.

Processed data availability

20/20 pts

Processed data is marked available in the GEO index.

Sample decision clarity

15/15 pts

All samples are assigned to a case or control group.

Blocking warnings

7/10 pts

Warnings are present, but none are critical blockers.

Metadata normalization

10/10 pts

Metadata quality is high enough to support downstream handoff.

Blockers

No readiness blockers detected.

Next Steps

  • Verify the proposed sample assignments and case-versus-control comparison against the GEO metadata before using them in DESeq2 or another differential-expression tool.
  • Confirm processed count files and sample identifiers match the exported metadata.

Analysis Preparation Checklist

5/6 ready

Group labels reviewed

Needs review

Siftome proposed case and control labels, but no reviewer confirmation is stored yet.

Open the sample grouping CSV and confirm group labels before analysis.

Minimum sample count met

Ready

Both groups meet the minimum of 2 samples.

Confirm whether the cohort is large enough for the intended statistical analysis.

Processed counts available

Ready

Processed data availability is marked true in the GEO index.

Verify that downloaded processed files contain usable count or expression identifiers.

Ambiguous samples handled

Ready

No review-needed or unassigned samples are present in the proposed grouping.

Review the grouping table for biologically meaningful differences that the automated checks may not detect.

Exclusion decisions recorded

Ready

No hard-excluded samples were detected by the current rules.

Record any manual exclusions in the downstream analysis notes.

Source traceability preserved

Ready

The dataset and sample accessions can be traced back to GEO.

Keep GEO accessions with exported metadata.

Bioinformatician Review

Bioinformatician review required

Ask a bioinformatician to review grouping, count availability, exclusions, and design before DE.

Assay context may require expert handling before DESeq2-style analysis.

Why This Is Ranked Here

Tumor vs normal
Not suitable Dataset does not meet the current suitability threshold.

Applied Review Decisions

No active review decisions affect this ranking.

Derived Classifications

  • Assay differs from search intent Microarray Search intent expects bulk RNA-seq. Assay came from Normalization rules.
  • Disease context Ulcerative colitis Disease context came from Normalization rules.
  • Likely case group Inflamed tissue 6 samples
  • Likely control group Non-inflamed tissue 6 samples

Intent Interpretation

  • Downgrade or exclusion reason Downgraded assay: microarray cohorts are separated from the RNA-seq intent. Derived from current-intent ranking reasons.

Ranking Facts

Supporting evidence

  • Comparison: Disease/model vs control. Specimen: Biopsy. Comparison suitability: 0%.
  • Interpreted disease metadata: Ulcerative colitis.
  • Processed data is available for downstream review.

Cautions

  • Downgraded assay: microarray cohorts are separated from the RNA-seq intent.
  • Disease/control design without a tumor/normal comparison is outside tumor/normal triage.
  • Overall score capped because comparison suitability is weak for the selected search intent.
  • Comparison suitability score is below the Phase 1 recommended threshold.

Dataset Warnings

Normalized Fields

100 fields

Sample Group Preview

12 rows shown
Show Hide
Study totals: Case 6 | Control 6 | Unassigned 0 | Excluded 0 | Ambiguous 0 12 rows shown
Group Role Accession Title Source / characteristics Reason
Inflamed tissue Case GSM1130492 Inflamed_no drug_rep1 Rectal mucosa biopsy cultured ex vivo_inflamed_no drug Disease state: Ulcerative colitis; Tissue: Rectal mucosa biopsy cultured ex vivo; Inflammation: Yes; Agent: No drug Case marker detected.
Inflamed tissue Case GSM1130493 Inflamed_no drug_rep2 Rectal mucosa biopsy cultured ex vivo_inflamed_no drug Disease state: Ulcerative colitis; Tissue: Rectal mucosa biopsy cultured ex vivo; Inflammation: Yes; Agent: No drug Case marker detected.
Inflamed tissue Case GSM1130494 Inflamed_no drug_rep3 Rectal mucosa biopsy cultured ex vivo_inflamed_no drug Disease state: Ulcerative colitis; Tissue: Rectal mucosa biopsy cultured ex vivo; Inflammation: Yes; Agent: No drug Case marker detected.
Inflamed tissue Case GSM1130495 Inflamed_5-ASA_rep1 Rectal mucosa biopsy cultured ex vivo_inflamed_5-ASA Disease state: Ulcerative colitis; Tissue: Rectal mucosa biopsy cultured ex vivo; Inflammation: Yes; Agent: 5-ASA Case marker detected.
Inflamed tissue Case GSM1130496 Inflamed_5-ASA_rep2 Rectal mucosa biopsy cultured ex vivo_inflamed_5-ASA Disease state: Ulcerative colitis; Tissue: Rectal mucosa biopsy cultured ex vivo; Inflammation: Yes; Agent: 5-ASA Case marker detected.
Inflamed tissue Case GSM1130497 Inflamed_5-ASA_rep3 Rectal mucosa biopsy cultured ex vivo_inflamed_5-ASA Disease state: Ulcerative colitis; Tissue: Rectal mucosa biopsy cultured ex vivo; Inflammation: Yes; Agent: 5-ASA Case marker detected.
Non-inflamed tissue Control GSM1130498 Non-inflamed_no drug_rep1 Rectal mucosa biopsy cultured ex vivo_Non-inflamed_no drug Disease state: Ulcerative colitis; Tissue: Rectal mucosa biopsy cultured ex vivo; Inflammation: No; Agent: No drug Sample-local control marker detected.
Non-inflamed tissue Control GSM1130499 Non-inflamed_no drug_rep2 Rectal mucosa biopsy cultured ex vivo_Non-inflamed_no drug Disease state: Ulcerative colitis; Tissue: Rectal mucosa biopsy cultured ex vivo; Inflammation: No; Agent: No drug Sample-local control marker detected.
Non-inflamed tissue Control GSM1130500 Non-inflamed_no drug_rep3 Rectal mucosa biopsy cultured ex vivo_Non-inflamed_no drug Disease state: Ulcerative colitis; Tissue: Rectal mucosa biopsy cultured ex vivo; Inflammation: No; Agent: No drug Sample-local control marker detected.
Non-inflamed tissue Control GSM1130501 Non-inflamed_5-ASA_rep1 Rectal mucosa biopsy cultured ex vivo_Non-inflamed_5-ASA Disease state: Ulcerative colitis; Tissue: Rectal mucosa biopsy cultured ex vivo; Inflammation: No; Agent: 5-ASA Sample-local control marker detected.
Non-inflamed tissue Control GSM1130502 Non-inflamed_5-ASA_rep2 Rectal mucosa biopsy cultured ex vivo_Non-inflamed_5-ASA Disease state: Ulcerative colitis; Tissue: Rectal mucosa biopsy cultured ex vivo; Inflammation: No; Agent: 5-ASA Sample-local control marker detected.
Non-inflamed tissue Control GSM1130503 Non-inflamed_5-ASA_rep3 Rectal mucosa biopsy cultured ex vivo_Non-inflamed_5-ASA Disease state: Ulcerative colitis; Tissue: Rectal mucosa biopsy cultured ex vivo; Inflammation: No; Agent: 5-ASA Sample-local control marker detected.

Use as Discovery Cohort

External Validation Finder

Carry Siftome's disease, organism, specimen, assay, data type, and accession into a validation project. Uncertain fields remain Unknown.