Researchers have discovered new gene variants associated with an often-severe type of the disease that affects children under the age of five. The findings were published online in the journal Gastroenterology.
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"As we continue to understand the specific functions of these genes in this type of childhood-onset disease, we are working to design more effective therapies," said study leader Judith Kelsen from The Children's Hospital of Philadelphia (CHOP), US.
Inflammatory bowel disease (IBD) is a painful, chronic inflammation of the gastrointestinal tract. In fact, very early-onset IBD (VEO-IBD), diagnosed under age five, is often more severe than IBD that starts later in childhood.
The study team analyzed DNA from 125 children with VEO-IBD, all of them under age four, along with DNA from 19 of their parents. A control group of 210 participants included 145 healthy individuals, 45 patients with pediatric IBD and 20 with adult-onset Crohn's disease (one of the two major types of IBD). The researchers found rare and novel variants in genes that regulate B-cells and T-cells -- immune cells with important roles in immunodeficiency disorders. They also discovered rare variants in the IL10RA gene, a member of a key immune function pathway.
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