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Updated: Aug 2, 2026
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Perturbations of Circulating miRNAs in Irritable Bowel Syndrome Detected Using a Multiplexed High-throughput Gene Expression Platform
Published on: November 30, 2016
Ileal Gene Expression Data from Crohn's Disease Small Bowel Resections Indicate Distinct Clinical Subgroups
Alka A Potdar1, Dalin Li1, Talin Haritunians1
1F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, Cedars-Sinai Medical Center, Los Angeles, California, USA.
Journal of Crohn'S & Colitis
|March 17, 2019
Summary
Researchers identified three subgroups within severe Crohn's disease (CD). One subgroup (CD3) shows higher recurrence and surgery rates, indicating a need for targeted therapies based on genetic and molecular signatures.
Area of Science:
- Gastroenterology
- Molecular Biology
- Genetics
Background:
- Crohn's disease (CD) heterogeneity complicates treatment development.
- Identifying distinct molecular profiles in severe, refractory CD is crucial for precision medicine.
Purpose of the Study:
- To define a unique molecular signature for severe, refractory CD.
- To enable precision therapy and earlier intervention for complicated CD cases.
Main Methods:
- Analysis of clinical data, genetics, and transcriptomics from uninvolved ileal tissue of CD patients.
- Determination of transcriptional risk scores, cellular signatures, and mechanistic pathways to define patient subsets.
Main Results:
- Three refractory CD subgroups (CD1, CD2, CD3) were identified.
- CD3 subgroup showed increased disease recurrence, higher rates of second surgery, and perianal CD presence.
- CD3 subgroup exhibited shorter recurrence-free survival, associated with eukaryotic initiation factor 2 (eIF2) and cyclic adenosine monophosphate (cAMP) signaling pathways, and enriched eosinophil and natural killer T (NKT) cell signatures.
Conclusions:
- A distinct subset of severe, refractory CD patients requiring aggressive treatment post-resection was characterized.
- This subset may benefit from targeted therapies informed by their specific genotype and tissue gene expression profile.
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