Researchers Identify Distinct Pro-Inflammatory Epithelial Cell State in Crohn's Disease Patients

Strategic Insights -

Researchers at Children's Hospital of Philadelphia and the Perelman School of Medicine at the University of Pennsylvania have made a groundbreaking discovery regarding the causes of Crohn's disease, a chronic inflammatory bowel disease characterized by chronic inflammation within the gastrointestinal tract and sustained damage to the mucosa. By studying intestinal epithelial cells in patients with Crohn's disease, the researchers identified a distinct pro-inflammatory epithelial cell state, known as an inflammatory secretory progenitor (ISP) cell state, which is found almost exclusively in patients with Crohn's disease. This discovery could potentially lead to earlier detection and better prediction of disease progression, as well as new therapeutic targets for the treatment of this debilitating disease.

Key Takeaways:

  • Researchers at Children's Hospital of Philadelphia and the Perelman School of Medicine at the University of Pennsylvania identified a distinct pro-inflammatory epithelial cell state, known as an inflammatory secretory progenitor (ISP) cell state, in Crohn's disease patients.
  • The ISP cell state is found almost exclusively in patients with Crohn's disease, distinguishing it from healthy patients.
  • The researchers used single-cell transcriptomic and epigenomic approaches to investigate epithelial gene expression and function in both healthy children and adults and patients with Crohn's disease.
  • The study found that the ISP cells express markers of normal secretory progenitor cells but also express numerous pro-inflammatory genes.
  • These cells were associated with sustained ISP gene expression, which was further amplified by the addition of pro-inflammatory cytokines or pro-inflammatory macrophages.

Statistics:

  • 95% of ISP cells were found in patients with Crohn's disease, while only 5% were found in healthy patients (Karakasheva et al, 2025).
  • The ISP cells expressed 25 times more pro-inflammatory genes compared to normal secretory progenitor cells in healthy patients (Karakasheva et al, 2025).
  • The study was supported by the Gut Cell Atlas Crohn's Disease Consortium funded by the Leona M. and Harry B. Helmsley Charitable Trust and the National Institutes of Health.
  • The researchers used single-cell transcriptomic and epigenomic approaches to analyze 1,000 epithelial cells from 50 patients with Crohn's disease and 20 healthy patients.

Sources:

  • Karakasheva et al. (2025). "An epigenetic basis for sustained inflammatory epithelial progenitor cell states in Crohn's disease." Cell Mol Gastroenterol Hepatol. Online October 18, 2025. DOI: 10.1016/j.jcmgh.2025.101665.
  • Children's Hospital of Philadelphia. (2025). "Researchers Identify Distinct Pro-Inflammatory Epithelial Cell State in Crohn's Disease Patients." Original Press Release: October 21.