The study addresses a major gap in IBD research: the lack of human models that accurately reflect disease complexity. Animal models often fail to replicate human immune responses and tissue behavior, leaving critical questions unanswered about Crohn’s disease and ulcerative colitis, which together affect millions of people.

To overcome this, researchers built donor-specific colon chips using cells taken from both inflamed and healthy regions of the same IBD patients. These chips combine intestinal epithelial cells and stromal fibroblasts in a microfluidic system that mimics blood flow, gut fluid movement, and even rhythmic intestinal stretching similar to peristalsis.

The result is a living model of the human gut that allows researchers to observe inflammation, barrier damage, and tissue remodeling in real time under controlled conditions.

The model showed that fibroblasts in the intestinal stroma are not just structural support cells but active drivers of disease. When IBD-derived fibroblasts were present, even healthy epithelial cells began to show disease-like behavior, including barrier breakdown and inflammation.

“Our study for the first time demonstrates that diseased fibroblasts are sufficient to cause healthy epithelial cells to take on many features of IBD,” said the researchers.

Mechanical stretching of the tissue further worsened inflammation and fibrosis, suggesting that gut movement itself can influence disease severity.

The system also revealed that immune cells moved more aggressively into epithelial tissue in diseased chips compared to healthy ones, closely mirroring what is seen in patients.

Hormones reshape severity

Researchers next tested whether pregnancy hormones influence IBD progression. When hormone levels similar to the first trimester were introduced into the system, inflammation and fibrosis increased significantly in IBD chips, but not in healthy ones. This offers a possible biological explanation for why some women experience worsening IBD symptoms during pregnancy.

The platform also helped model early cancer development. When exposed to a carcinogen, IBD chips showed higher mutation rates, chromosomal changes, and activation of cancer-related pathways compared to healthy chips, suggesting that chronic inflammation may increase cancer susceptibility through measurable cellular changes.

Cancer risk revealed

The study also showed that IBD-associated fibroblasts amplify early cancer signals in epithelial cells. This provides a direct link between stromal cell behavior and cancer initiation in inflamed intestinal tissue.

“IBD Chips lined by tissue recombinants with ENU again found a dominant function for IBD fibroblasts which potently induced the expression of the early-stage colorectal cancer marker (CEACAM5) in healthy epithelial cells exposed to this carcinogen,” said the researchers.

The findings suggest that fibrosis and inflammatory signaling in the gut may actively contribute to cancer risk, not just accompany disease progression.

The work highlights how patient-derived organ chips could become a tool for studying complex diseases and testing therapies in a controlled human-relevant system.

The study appears in the journal Nature Biomedical Engineering.