GSE130038

Elevated colonic mucin expression correlates with extended time to surgery for ulcerative colitis patients

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

26 case / 0 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

Background: Ulcerative colitis (UC) develops from chronic inflammation of the colon. Most patients respond favorably to medical management, however around 25% of UC patients will require surgery to treat their disease. While surgery is the only curative treatment for UC, it can carry its own risks, particularly when the surgery is emergent. Time from diagnosis to surgery varies dramatically amongst UC patients, thus a better understanding of how the colonic microenvironment relates to disease severity is needed to improve patient outcomes. Methods: We conducted RNA-seq on full-thickness sigmoid colonic tissues from 26 UC patients undergoing colectomy for their disease. Hierarchical clustering of the transcriptomes identified disease subsets. Subsets were characterized using differential gene expression analysis, cell type deconvolution, and network analysis. Results: We identified two distinct UC subsets in our cohort that were distinguished by 957 differentially expressed genes. Cluster 1 was enriched in genes associated with intestinal epithelial cell differentiation, while cluster 2 was enriched in genes associated with epithelial-to-mesenchymal transition and inflammatory responses. Cluster 1 was associated with an extended time from UC diagnosis to colectomy. Of cluster 1 genes, elevated MUC5B, MUC4, and MUC2 expression displayed the strongest correlation with increased time to surgery. Conclusion: Our transcriptome analysis indicates that UC can be subclassified into at least two distinct molecular signatures. We find that elevated mucin gene expression correlates with prolonged time to colectomy after diagnosis. These results identified MUC5B, MUC4, and MUC2 as potential prognostic indicators of disease severity, as reflected in time to surgery.

Overall design

Gene expression profiles from the surgically resected, diseased, sigmoid colon tissue of 26 ulcerative colitis patients were generated by deep sequencing.

Source Evidence

4 sources
Source Contribution Status
GEO

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

Sample records
26 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

Primary GEO citations and related PubMed articles that mention this dataset.

1 linked publication 1 DOI

Primary publication

  1. Elevated Colonic Mucin Expression Correlates with Extended Time to Surgery for Ulcerative Colitis Patients. Journal of gastrointestinal and liver diseases : JGLD, 2019
Available

Metadata Quality Components

Analysis Readiness

Not ready
55% DE readiness

Contrast completeness

10/25 pts

Only one side of the contrast is present; downstream DE needs both groups.

Minimum group size

0/20 pts

Minimum group size cannot be evaluated until a complete contrast exists.

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

0/10 pts

Critical warnings must be resolved before downstream analysis.

Metadata normalization

10/10 pts

Metadata quality is high enough to support downstream handoff.

Blockers

  • No complete case/control contrast is available.
  • Critical dataset warnings must be resolved.

Next Steps

  • Resolve critical warnings before downstream analysis.

Analysis Preparation Checklist

4/6 ready

Group labels reviewed

Blocked

No complete case/control grouping exists yet.

Review the sample grouping table and assign both case and control groups.

Minimum sample count met

Blocked

At least one group has fewer than 2 samples.

Choose a larger dataset or merge only scientifically valid groups.

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.

Analysis readiness has blockers that must be resolved before DE.

Analysis preparation checklist contains blocked items.

No complete case/control or treatment/control contrast is available.

At least one comparison group has fewer than two samples.

Critical dataset warnings are present.

Study design is model-system or unclear and should be reviewed before 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

  • Disease context Ulcerative colitis Disease context came from Normalization rules.
  • Likely case group Ulcerative colitis 26 samples
  • Likely control group No control group detected 0 samples

Intent Interpretation

  • Downgrade or exclusion reason Comparison: Unclear study design. Specimen: Tissue. Comparison suitability: 0%. Derived from current-intent ranking reasons.

Ranking Facts

Supporting evidence

  • Prioritized assay: bulk RNA-seq is the active assay expectation.
  • Interpreted disease metadata: Ulcerative colitis.
  • Processed data is available for downstream review.
  • External evidence: PubMed links 1 publication; 1 DOI available: PMID 31826065.
  • Publication context: Elevated Colonic Mucin Expression Correlates with Extended Time to Surgery for Ulcerative Colitis Patients.. Journal of gastrointestinal and liver diseases : JGLD, 2019. PMID 31826065. DOI 10.15403/jgld-250.

Cautions

  • Comparison: Unclear study design. Specimen: Tissue. Comparison suitability: 0%.
  • Downgraded for tissue search because study design or specimen source is unclear.
  • Unclear study design downgraded for patient tissue tumor-vs-normal search intent.
  • Missing or unclear metadata. Unclear study design downgraded for patient tissue tumor-vs-normal search intent.
  • Overall score capped because comparison suitability is weak for the selected search intent.
  • Missing or unclear metadata. Comparison - Unclear study design. Specimen - Tissue. Comparison suitability: 0%.
  • Missing or unclear metadata. Downgraded for tissue search because study design or specimen source is unclear.
  • Comparison suitability score is below the Phase 1 recommended threshold.

Dataset Warnings

Normalized Fields

83 fields

Sample Group Preview

26 rows shown
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Study totals: Case 26 | Control 0 | Unassigned 0 | Excluded 0 | Ambiguous 0 26 rows shown
Group Role Accession Title Source / characteristics Reason
Ulcerative colitis Case GSM3730677 G155-01 Sigmoid colon tissue Disease: UC; Tissue: Sigmoid colon; Sex: Male; Smoking history: Ex smoker; Age at diagnosis: 34.86; Age at surgery: 37.00; Bmi: 25.30 Case marker detected.
Ulcerative colitis Case GSM3730678 G155-02 Sigmoid colon tissue Disease: UC; Tissue: Sigmoid colon; Sex: Female; Smoking history: Never Smoked; Age at diagnosis: 43.76; Age at surgery: 54.96; Bmi: 34.10 Case marker detected.
Ulcerative colitis Case GSM3730679 G155-03 Sigmoid colon tissue Disease: UC; Tissue: Sigmoid colon; Sex: Male; Smoking history: Never Smoked; Age at diagnosis: 77.52; Age at surgery: 80.00; Bmi: 25.80 Case marker detected.
Ulcerative colitis Case GSM3730680 G155-04 Sigmoid colon tissue Disease: UC; Tissue: Sigmoid colon; Sex: Male; Smoking history: Ex smoker; Age at diagnosis: 54.89; Age at surgery: 56.86; Bmi: 26.10 Case marker detected.
Ulcerative colitis Case GSM3730681 G155-05 Sigmoid colon tissue Disease: UC; Tissue: Sigmoid colon; Sex: Female; Smoking history: Ex smoker; Age at diagnosis: 64.58; Age at surgery: 67.00; Bmi: 22.90 Case marker detected.
Ulcerative colitis Case GSM3730682 G155-06 Sigmoid colon tissue Disease: UC; Tissue: Sigmoid colon; Sex: Female; Smoking history: Ex smoker; Age at diagnosis: 47.55; Age at surgery: 57.00; Bmi: 20.40 Case marker detected.
Ulcerative colitis Case GSM3730683 G155-07 Sigmoid colon tissue Disease: UC; Tissue: Sigmoid colon; Sex: Female; Smoking history: Ex smoker; Age at diagnosis: 50.80; Age at surgery: 75.47; Bmi: 28.12 Case marker detected.
Ulcerative colitis Case GSM3730684 G155-08 Sigmoid colon tissue Disease: UC; Tissue: Sigmoid colon; Sex: Male; Smoking history: Ex smoker; Age at diagnosis: 26.50; Age at surgery: 32.13; Bmi: 26.85 Case marker detected.
Ulcerative colitis Case GSM3730685 G155-09 Sigmoid colon tissue Disease: UC; Tissue: Sigmoid colon; Sex: Female; Smoking history: Ex smoker; Age at diagnosis: 65.01; Age at surgery: 66.62; Bmi: 30.00 Case marker detected.
Ulcerative colitis Case GSM3730686 G155-10 Sigmoid colon tissue Disease: UC; Tissue: Sigmoid colon; Sex: Female; Smoking history: Ex smoker; Age at diagnosis: 48.02; Age at surgery: 54.34; Bmi: 27.00 Case marker detected.
Ulcerative colitis Case GSM3730687 G155-11 Sigmoid colon tissue Disease: UC; Tissue: Sigmoid colon; Sex: Female; Smoking history: Never Smoked; Age at diagnosis: 31.89; Age at surgery: 33.55; Bmi: 22.30 Case marker detected.
Ulcerative colitis Case GSM3730688 G155-12 Sigmoid colon tissue Disease: UC; Tissue: Sigmoid colon; Sex: Female; Smoking history: Ex smoker; Age at diagnosis: 29.73; Age at surgery: 45.00; Bmi: 26.99 Case marker detected.
Ulcerative colitis Case GSM3730689 G155-13 Sigmoid colon tissue Disease: UC; Tissue: Sigmoid colon; Sex: Male; Smoking history: Ex smoker; Age at diagnosis: 30.39; Age at surgery: 40.15; Bmi: 35.80 Case marker detected.
Ulcerative colitis Case GSM3730690 G155-14 Sigmoid colon tissue Disease: UC; Tissue: Sigmoid colon; Sex: Female; Smoking history: Never Smoked; Age at diagnosis: 33.30; Age at surgery: 36.00; Bmi: 37.37 Case marker detected.
Ulcerative colitis Case GSM3730691 G155-15 Sigmoid colon tissue Disease: UC; Tissue: Sigmoid colon; Sex: Female; Smoking history: Never Smoked; Age at diagnosis: 28.97; Age at surgery: 36.71; Bmi: 21.08 Case marker detected.
Ulcerative colitis Case GSM3730692 G155-16 Sigmoid colon tissue Disease: UC; Tissue: Sigmoid colon; Sex: Male; Smoking history: Ex smoker; Age at diagnosis: 71.80; Age at surgery: 73.93; Bmi: 28.23 Case marker detected.
Ulcerative colitis Case GSM3730693 G155-17 Sigmoid colon tissue Disease: UC; Tissue: Sigmoid colon; Sex: Male; Smoking history: Never Smoked; Age at diagnosis: 55.61; Age at surgery: 59.63; Bmi: 28.87 Case marker detected.
Ulcerative colitis Case GSM3730694 G155-18 Sigmoid colon tissue Disease: UC; Tissue: Sigmoid colon; Sex: Male; Smoking history: Ex smoker; Age at diagnosis: 61.86; Age at surgery: 64.13; Bmi: 19.80 Case marker detected.
Ulcerative colitis Case GSM3730695 G155-19 Sigmoid colon tissue Disease: UC; Tissue: Sigmoid colon; Sex: Male; Smoking history: Never Smoked; Age at diagnosis: 38.69; Age at surgery: 40.00; Bmi: 24.91 Case marker detected.
Ulcerative colitis Case GSM3730696 G155-20 Sigmoid colon tissue Disease: UC; Tissue: Sigmoid colon; Sex: Male; Smoking history: Ex smoker; Age at diagnosis: 51.58; Age at surgery: 53.58; Bmi: 26.87 Case marker detected.
Ulcerative colitis Case GSM3730697 G155-22 Sigmoid colon tissue Disease: UC; Tissue: Sigmoid colon; Sex: Male; Smoking history: Never Smoked; Age at diagnosis: 39.82; Age at surgery: 45.46; Bmi: 31.06 Case marker detected.
Ulcerative colitis Case GSM3730698 G155-23 Sigmoid colon tissue Disease: UC; Tissue: Sigmoid colon; Sex: Female; Smoking history: Never Smoked; Age at diagnosis: 28.87; Age at surgery: 41.57; Bmi: 21.39 Case marker detected.
Ulcerative colitis Case GSM3730699 G155-24 Sigmoid colon tissue Disease: UC; Tissue: Sigmoid colon; Sex: Female; Smoking history: Ex smoker; Age at diagnosis: 20.85; Age at surgery: 37.00; Bmi: 20.00 Case marker detected.
Ulcerative colitis Case GSM3730700 G155-25 Sigmoid colon tissue Disease: UC; Tissue: Sigmoid colon; Sex: Male; Smoking history: Ex smoker; Age at diagnosis: 37.01; Age at surgery: 43.20; Bmi: 25.80 Case marker detected.
Ulcerative colitis Case GSM3730701 G155-26 Sigmoid colon tissue Disease: UC; Tissue: Sigmoid colon; Sex: Male; Smoking history: Never Smoked; Age at diagnosis: 27.76; Age at surgery: 48.74; Bmi: 34.01 Case marker detected.
Ulcerative colitis Case GSM3730702 G155-27 Sigmoid colon tissue Disease: UC; Tissue: Sigmoid colon; Sex: Male; Smoking history: Ex smoker; Age at diagnosis: 72.66; Age at surgery: 75.01; Bmi: 22.07 Case 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.