A team of researchers affiliated with multiple institutions in Italy has found a possible connection between depression and anxiety for IBD patients and the vascular barrier in the brain choroid plexus closing. In their paper published in the journal Science, the group describes their study of the gut-brain axis response to inflammation and its link to psychiatric illnesses.

Prior research has shown that many people with inflammatory bowel disease (IBD) also experience anxiety and depression. While some have suggested such disorders are a natural reaction to people experiencing an unpleasant ailment, others have suggested there may be a more physical reason. In this new effort, the researchers looked at what happens to other parts of the body when inflammation in the gut due to IBD arises. To learn more about it, the researchers studied IBD mouse models.

In studying the lab mice, the researchers found that when inflammation strikes the gut due to IBD, the body reacts in ways to prevent the inflammation from spreading to other parts of the body. One such response, they found, was closure of the vascular barrier in the choroid plexus of the brain—a group of cells that produce cerebrospinal fluid for the central nervous system and also serve as a barrier preventing material from moving between blood vessels and the cerebrospinal fluid.

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