A stiffening of colon tissue, driven by chronic inflammation, may be a key factor in the alarming rise of early-onset colorectal cancer (CRC), according to a new study. Researchers discovered that this increased rigidity isn’t just within tumors themselves, but also in the surrounding healthy tissue, potentially creating a fertile ground for cancer to develop and spread.
The Colon’s Changing Texture: A Warning Sign?
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New research links inflammation-induced stiffness to the increasing incidence of colorectal cancer in younger adults.
- Colorectal cancers diagnosed before age 50, known as early-onset CRCs, are increasing sharply.
- Chronic inflammation can cause scarring and stiffening of colon tissue.
- This stiffness may alter cancer cell behavior, promoting faster growth and spread.
- Measuring intestinal stiffness could potentially identify individuals at higher risk.
“We consider this study a significant advancement toward identifying those at risk of early-onset CRC and finding new ways to treat them,” said Emina Huang, M.D., M.B.A., Professor of Surgery in the Division of Colon and Rectal Surgery and Executive Vice Chair of Research for Surgery at UT Southwestern. She is also Professor of Biomedical Engineering and in the Harold C. Simmons Complete Cancer Center.
What causes the rise in early-onset colorectal cancer? The study, published in [Insert Journal name Here], analyzed tissue samples from 35 patients undergoing tumor removal surgery at William P. Clements university Hospital and Parkland Health-19 with average-onset CRC and 16 with early-onset CRC. Each sample included both tumor tissue and nearby noncancerous tissue.
The results were striking: tissue from patients with early-onset CRC was significantly stiffer than tissue from older patients, not only within the tumors but also in the surrounding healthy areas. This suggests that increased stiffness may precede the full development of cancer.
Collagen: The Key to Understanding Rigidity
To pinpoint the cause of this rigidity, the team examined collagen, a structural protein that accumulates and changes during scarring. Colon tissue from early-onset CRC patients contained collagen that was denser, longer, more mature, and more uniformly aligned compared to samples from average-onset cases-strong indicators of extensive scarring.
Further analysis of gene activity revealed higher expression of genes involved in collagen metabolism, blood vessel formation, and inflammation in early-onset CRC samples, reinforcing the connection between chronic inflammation and tissue stiffening.
Stiff Environments and Cancer Cell Behavior
The researchers also observed increased activity in a pathway linked to mechanotransduction
