Lab-Grown Gut on a Chip Reveals How Inflammatory Bowel Disease May Promote Cancer

Inflammatory bowel disease (IBD) affects millions of people worldwide, yet scientists still do not fully understand why chronic inflammation develops or why the disease progresses so differently between individuals. Although current treatments can help control symptoms, many of the biological mechanisms underlying Crohn's disease and ulcerative colitis remain unclear.

Now, researchers have developed a laboratory model that closely recreates key features of human IBD using patient-derived cells. The study, published in Nature Biomedical Engineering, provides new insight into how the disease develops and identifies an unexpected cell type that may play a central role in driving inflammation.

A Human Colon Recreated on a Chip

Researchers at Harvard University created a miniature device known as a Colon Chip, which reproduces important aspects of the human intestine using cells donated by patients with Crohn's disease and ulcerative colitis.

The device combines intestinal epithelial cells, connective tissue cells called fibroblasts, circulating immune cells, and mechanical forces that mimic the natural movements of the gut. Together, these components create an environment that more closely resembles the human intestine than conventional laboratory models.

This approach allows researchers to examine how different cell types contribute to inflammation, damage to the intestinal lining, and breakdown of the gut barrier. It also provides an opportunity to investigate how chronic inflammation may increase the risk of developing colorectal cancer.

Fibroblasts Played an Unexpected Role

One of the study's most significant findings involved fibroblasts, cells traditionally viewed as providing structural support and assisting with tissue repair. In the Colon Chip, fibroblasts obtained from patients with IBD actively promoted inflammation rather than simply responding to it.

When healthy intestinal cells from the same donors were cultured alongside these fibroblasts, the previously healthy tissue began displaying characteristics typically associated with IBD. The intestinal barrier became more permeable, and inflammatory responses increased even without additional disease triggers.

These findings suggest that fibroblasts may play a much more active role in disease progression than previously recognized. Although earlier studies had linked them to tissue remodeling and chronic inflammation, the new research indicates they may independently drive healthy intestinal tissue toward a disease-like state.

Simulating Gut Movement and Pregnancy

The Colon Chip also reproduces gentle stretching similar to the contractions that occur during normal bowel movements. When this peristalsis-like motion was applied to chips containing cells from patients with IBD, inflammatory and fibrotic responses became even more pronounced.

The researchers also investigated why some women experience worsening IBD symptoms during pregnancy. By exposing Colon Chips created from female patients' cells to pregnancy-related hormones, they observed increased inflammation and greater collagen accumulation associated with tissue fibrosis.

According to the authors, this represents the first laboratory model capable of reproducing pregnancy-associated IBD flare-ups using human tissue. The platform offers researchers a controlled way to study how hormonal changes interact with existing disease mechanisms.

Investigating Early Cancer Development

People with long-standing inflammatory bowel disease have an increased risk of developing colorectal cancer, but studying the earliest stages of this process in humans has been difficult.

Using the Colon Chip, the researchers exposed both healthy and diseased tissue models to the carcinogen N-ethyl-N-nitrosourea. The IBD models developed substantially stronger molecular changes associated with cancer than healthy tissue, reflecting the increased cancer risk observed in patients with chronic intestinal inflammation.

Fibroblasts again appeared to play an important role. Healthy intestinal tissue began expressing early cancer-related markers only when cultured alongside fibroblasts obtained from patients with IBD, suggesting these cells help create an environment that promotes tumor development.

Implications for Future Treatment

The researchers believe the Colon Chip represents a significant advance over traditional laboratory models because it recreates disease using fully human, patient-derived cells within an organ-like environment. This allows scientists to investigate biological mechanisms that may not be captured by standard cell cultures, organoids, or many animal models.

The platform could eventually be used to evaluate new treatments on an individual patient basis, identify the biological pathways that drive disease progression, and examine how medications, hormones, or environmental factors influence intestinal inflammation. It may also help explain why some people with IBD develop colorectal cancer while others with similar disease do not.

Although additional studies involving larger numbers of patients are still needed, the researchers believe the Colon Chip provides a powerful new tool for studying inflammatory bowel disease. By reproducing the complexity of the human intestine in the laboratory, the technology could accelerate the development of more precise therapies and improve efforts to prevent long-term complications.