GSE25275

Gene expression patterns of biopsies from a colonoscopy taken in 2007 of an ulcerative colitis patient infected with Trichuris trichiura

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

14 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

Helminth infection may have the potential to suppress intestinal inflammation in inflammatory bowel diseases. Ulcerative colitis is more common in developed countries than in developing countries endemic for helminth infections. There are animal models, as well as clinical trials, suggesting therapeutic effects of experimental helminth infection. Here, we provide a comprehensive molecular portrait of dynamic changes in the intestinal mucosa of an individual who infected himself with Trichuris trichiura to treat his symptoms of ulcerative colitis. Genes involved in carbohydrate and lipid metabolism were upregulated in helminth-colonized tissue, while tissues with active colitis showed upregulation of proinflammatory genes such as IL-17, IL13RA2, and CHI3L1. T. trichiura colonization of the intestine may reduce symptomatic colitis by promoting goblet cell hyperplasia and mucus production through TH2 cytokines and IL-22. By better understanding the physiological effects of helminth infection, new therapies for ulcerative colitis could be identified. This is the first (out of three) series of arrays from this patient from a colonoscopy in 2007 when the patient had mild proctitis in the rectum and worms in the ascending and transverse colon.

Overall design

We analyzed 14 HEEBO arrays on which were hybridized RNA amplified from pinch biopsies collected from different regions of the colon. 3 samples were from the ascending colon, which was colonized by worms at the time. 2 samples were from the transverse colon, which was also colonized by worms at the time. 4 samples were from the sigmoid colon, which appeared normal at the time. 3 samples were from the rectum, which showed signs of proctitis and was inflamed at the time. 2 samples were from the terminal ileum, which was unaffected by worms or colitis.

Source Evidence

4 sources
Source Contribution Status
GEO

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

Sample records
14 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. IL-22+ CD4+ T cells are associated with therapeutic trichuris trichiura infection in an ulcerative colitis patient. Science translational medicine, 2010
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.

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

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

  • Assay differs from search intent Microarray Search intent expects bulk RNA-seq. Assay came from Normalization rules.
  • Disease context Inflammatory bowel disease, ulcerative colitis Disease context came from Normalization rules.
  • Likely case group Ulcerative colitis 14 samples
  • Likely control group No control group detected 0 samples

Intent Interpretation

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

Ranking Facts

Supporting evidence

  • Interpreted disease metadata: Infectious disease or host response, Inflammatory bowel disease, Ulcerative colitis.
  • Processed data is available for downstream review.
  • External evidence: PubMed links 1 publication; 1 DOI available: PMID 21123809.
  • Publication context: IL-22+ CD4+ T cells are associated with therapeutic trichuris trichiura infection in an ulcerative colitis patient.. Science translational medicine, 2010. PMID 21123809. DOI 10.1126/scitranslmed.3001500.

Cautions

  • Comparison: Unclear study design. Specimen: Biopsy. Comparison suitability: 0%.
  • Downgraded for tissue search because study design or specimen source is unclear.
  • Downgraded assay: microarray cohorts are separated from the RNA-seq intent.
  • 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 - Biopsy. 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

76 fields

Sample Group Preview

14 rows shown
Show Hide
Study totals: Case 14 | Control 0 | Unassigned 0 | Excluded 0 | Ambiguous 0 14 rows shown
Group Role Accession Title Source / characteristics Reason
Ulcerative colitis Case GSM621932 Ascending_Colon_1_07 Amplified RNA from ascending colon pinch biopsy from an ulcerative colitis patient infected with Trichuris trichiura Tissue: Ascending colon biopsy; Disease state: Ulcerative colitis patient infected with Trichuris trichiura Case marker detected.
Ulcerative colitis Case GSM621933 Ascending_Colon_2_07 Amplified RNA from ascending colon pinch biopsy from an ulcerative colitis patient infected with Trichuris trichiura Tissue: Ascending colon biopsy; Disease state: Ulcerative colitis patient infected with Trichuris trichiura Case marker detected.
Ulcerative colitis Case GSM621934 Ascending_Colon_3_07 Amplified RNA from ascending colon pinch biopsy from an ulcerative colitis patient infected with Trichuris trichiura Tissue: Ascending colon biopsy; Disease state: Ulcerative colitis patient infected with Trichuris trichiura Case marker detected.
Ulcerative colitis Case GSM621935 Transverse_Colon_1_07 Amplified RNA from transverse colon pinch biopsy from an ulcerative colitis patient infected with Trichuris trichiura Tissue: Transverse colon biopsy; Disease state: Ulcerative colitis patient infected with Trichuris trichiura Case marker detected.
Ulcerative colitis Case GSM621936 Transverse_Colon_2_07 Amplified RNA from transverse colon pinch biopsy from an ulcerative colitis patient infected with Trichuris trichiura Tissue: Transverse colon biopsy; Disease state: Ulcerative colitis patient infected with Trichuris trichiura Case marker detected.
Ulcerative colitis Case GSM621937 Rectum_1_07 Amplified RNA from rectum pinch biopsy from an ulcerative colitis patient infected with Trichuris trichiura Tissue: Rectum biopsy; Disease state: Ulcerative colitis patient infected with Trichuris trichiura Case marker detected.
Ulcerative colitis Case GSM621938 Rectum_2_07 Amplified RNA from rectum pinch biopsy from an ulcerative colitis patient infected with Trichuris trichiura Tissue: Rectum biopsy; Disease state: Ulcerative colitis patient infected with Trichuris trichiura Case marker detected.
Ulcerative colitis Case GSM621939 Rectum_3_07 Amplified RNA from rectum pinch biopsy from an ulcerative colitis patient infected with Trichuris trichiura Tissue: Rectum biopsy; Disease state: Ulcerative colitis patient infected with Trichuris trichiura Case marker detected.
Ulcerative colitis Case GSM621940 Sigmoid_Colon_1_07 Amplified RNA from sigmoid colon pinch biopsy from an ulcerative colitis patient infected with Trichuris trichiura Tissue: Sigmoid colon biopsy; Disease state: Ulcerative colitis patient infected with Trichuris trichiura Case marker detected.
Ulcerative colitis Case GSM621941 Sigmoid_Colon_2_07 Amplified RNA from sigmoid colon pinch biopsy from an ulcerative colitis patient infected with Trichuris trichiura Tissue: Sigmoid colon biopsy; Disease state: Ulcerative colitis patient infected with Trichuris trichiura Case marker detected.
Ulcerative colitis Case GSM621942 Sigmoid_Colon_3_07 Amplified RNA from sigmoid colon pinch biopsy from an ulcerative colitis patient infected with Trichuris trichiura Tissue: Sigmoid colon biopsy; Disease state: Ulcerative colitis patient infected with Trichuris trichiura Case marker detected.
Ulcerative colitis Case GSM621943 Sigmoid_Colon_4_07 Amplified RNA from sigmoid colon pinch biopsy from an ulcerative colitis patient infected with Trichuris trichiura Tissue: Sigmoid colon biopsy; Disease state: Ulcerative colitis patient infected with Trichuris trichiura Case marker detected.
Ulcerative colitis Case GSM621944 Terminal_Ileum_1_07 Amplified RNA from terminal ileum pinch biopsy from an ulcerative colitis patient infected with Trichuris trichiura Tissue: Terminal ileum biopsy; Disease state: Ulcerative colitis patient infected with Trichuris trichiura Case marker detected.
Ulcerative colitis Case GSM621945 Terminal_Ileum_2_07 Amplified RNA from terminal ileum pinch biopsy from an ulcerative colitis patient infected with Trichuris trichiura Tissue: Terminal ileum biopsy; Disease state: Ulcerative colitis patient infected with Trichuris trichiura 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.