http://medicalxpress.com/news/2016-03-immune-gut-deadly-infections-bay.html#nRlv

This article asserts that:

"They found that a small molecule called PGE2 plays a crucial role by activating specialised immune cells called innate lymphoid cells. These cells help to maintain the barrier between the gut and rest of the body.

If PGE2 is blocked or doesn't function correctly, these cells are not activated and the gut barrier breaks down allowing bacteria to escape.

The researchers also showed that PGE2 triggers innate lymphoid cells to produce a chemical called IL-22, which helps to prevent the breakdown of the gut barrier and stop body-wide inflammation.

PGE2 is one of a family of molecules called prostaglandins that are blocked by common anti-inflammatory drugs, including aspirin and ibuprofen."

Professor Adriano Rossi also from the MRC Centre for Inflammation Research added: "Keeping the trillions of bacteria located in your gut in check is essential for maintaining health. This study provides strong evidence that key mediators and their interaction with particular immune cells maintain gut barrier integrity thereby preventing the escape of bacteria from the gut into the rest of the body."

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