Background & Aims: Sleep disruption modifies the immune system and can trigger flares of inflammatory bowel diseases (IBD). Changes in expression of clock genes have been reported in patients with IBD. We investigated whether a change in the circadian clock is an early event in development of IBD. Methods: We performed a prospective study of patients younger than 21 years old who underwent diagnostic endoscopies at the pediatric and adult gastroenterology units at the Tel Aviv Sourasky Medical Center from August 2016 through August 2017. Questionnaires were completed by 32 patients with IBD (8–21 years old) and 18 healthy individuals (controls) that provided data on demographics, sleep, disease activity scores. We also obtained data on endoscopic scores, anthropometric parameters, blood level of C-reactive protein (CRP), and fecal level of calprotectin. Peripheral blood and intestinal mucosa samples were analyzed for expression levels of clock gene (CLOCK, BMAL1, CRY1, CRY2, PER1, and PER2). Results: Levels of CRP and fecal calprotectin were significantly higher in patients with IBD compared with controls (P
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Weintraub, Y., Cohen, S., Chapnik, N., Ben-Tov, A., Yerushalmy-Feler, A., Dotan, I., … Froy, O. (2020). Clock Gene Disruption Is an Initial Manifestation of Inflammatory Bowel Diseases. Clinical Gastroenterology and Hepatology, 18(1), 115-122.e1. https://doi.org/10.1016/j.cgh.2019.04.013
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