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Stronger intestinal barrier may prevent cancer in the rest of the body, new study suggests
Date:2/21/2012

PHILADELPHIA A leaky gut may be the root of some cancers forming in the rest of the body, a new study published online Feb. 21 in PLoS ONE by Thomas Jefferson University researchers suggests.

It appears that the hormone receptor guanylyl cyclase C (GC-C)a previously identified tumor suppressor that exists in the intestinal tractplays a key role in strengthening the body's intestinal barrier, which helps separate the gut world from the rest of the body, and possibly keeps cancer at bay. Without the receptor, that barrier weakens.

A team led by Scott Waldman, M.D., Ph.D., chair of the Department of Pharmacology and Experimental Therapeutics at Jefferson and director of the Gastrointestinal Cancer Program at Jefferson's Kimmel Cancer Center, discovered in a pre-clinical study that silencing GC-C in mice compromised the integrity of the intestinal barrier. It allowed inflammation to occur and cancer-causing agents to seep out into the body, damaging DNA and forming cancer outside the intestine, including in the liver, lung and lymph nodes.

Conversely, stimulating GC-C in intestines in mice strengthened the intestinal barrier opposing these pathological changes.

A weakened intestinal barrier has been linked to many diseases, like inflammatory bowel disease, asthma and food allergies, but this study provides fresh evidence that GC-C plays a role in the integrity of the intestine. Strengthening it, the team says, could potentially protect people against inflammation and cancer in the rest of the body.

"If the intestinal barrier breaks down, it becomes a portal for stuff in the outside world to leak into the inside world," said Dr. Waldman. "When these worlds collide, it can cause many diseases, like inflammation and cancer."

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Contact: Steve Graff
stephen.graff@jefferson.edu
215-955-5291
Thomas Jefferson University
Source:Eurekalert  

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