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Study Uncovers Strong Links Between Depression and Crohn's, Colitis
  • By Robert Preidt HealthDay Reporter
  • Posted June 6, 2022

Study Uncovers Strong Links Between Depression and Crohn's, Colitis

New research points to a compelling interplay between inflammatory bowel disease (IBD) and depression.

IBD includes Crohn's disease and ulcerative colitis. In addition to the physical pain that these illnesses can inflict upon sufferers, the new study showed that patients face a significantly increased risk of depression.

Interestingly, the investigators also found that IBD-free siblings of people with the disorder were more likely to develop depression. People with IBD were nine times more likely to develop depression than the general population, while their siblings who did not have IBD were nearly two times more likely to develop the mood disorder.

At the same time, people with depression were two times more likely to develop IBD, and their siblings without depression were more than 1.5 times more likely to develop IBD, according to the study recently published in the Journal of Gastroenterology and Hepatology.

"This research reveals a clinical overlap between both conditions, and is the first study to investigate the two-way association between IBD and depression in siblings," said co-lead author Dr. Bing Zhang. He is a gastroenterologist at the University of Southern California's Keck School of Medicine.

"The finding that people with IBD are more prone to depression makes sense because IBD causes constant gastrointestinal symptoms that can be very disruptive to a patient's life," Zhang said in a university news release. "And the elevated depression risk among siblings of IBD patients may reflect caregiver fatigue if the siblings have a role in caring for the patient."

Environmental stressors, the gut microbiome and genetics are among the many factors that may play a role in the two-way link between IBD and depression, according to Zhang.

He did note that the team was surprised to find that people with depression are prone to IBD, and said that may have to do with what's called the gut-brain axis, the connection between the gastrointestinal system and the central nervous system, which consists of the spinal cord and the brain.

For example, inflammation of the brain, which plays a role in depression, may be linked to the inflammation of the gastrointestinal tract, a hallmark of IBD, Zhang explained.

About 1.6 million Americans have IBD and more than 16 million have depression.

More information

There's more on IBD and mental health at Crohn's and Colitis Canada.

SOURCE: University of Southern California, news release, June 2, 2022

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