Research Paper Volume 13, Issue 5 pp 6359—6374
Mucosal microRNAs relate to age and severity of disease in ulcerative colitis
- 1 The Pediatric Department, Copenhagen University Hospital, Hvidovre 2650, Denmark
- 2 The Pediatric Department, Holbaek Hospital, Holbaek 4300, Denmark
- 3 Department of Pathology, Copenhagen University Hospital, Herlev 2730, Denmark
- 4 Biomedical Technology, Bioneer A/S, Hoersholm 2970, Denmark
Received: December 2, 2020 Accepted: January 25, 2021 Published: March 1, 2021https://doi.org/10.18632/aging.202715
How to Cite
Copyright: © 2021 Malham et al. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Despite significant evidence that the expression of several microRNAs (miRNAs) impacts disease activity in patients with ulcerative colitis (UC), it remains unknown if the more severe disease phenotype seen in pediatric onset UC can be explained by an altered miRNA expression. In this study, we assessed the relationship between miRNA expression, age, and disease severity in pediatric and adult patients with UC. Using RT-qPCR, we analyzed the expression of miR-21, miR-31, miR-126, miR-142 and miR-155 in paraffin embedded rectum biopsies from 30 pediatric and 30 adult-onset UC patients. We found that lesions from adult patients had significantly higher expression levels of miR-21 compared to pediatric patients and that the expression levels of miR-31 (all patients) and miR-155 (pediatric patients only) correlated inversely with histological assessed disease severity. Using in situ hybridization followed by image analysis, the expression level estimates of miR-21 and miR-126 correlated with histological assessed disease severity. In conclusion, we found that the expression of miRNAs depends on the age of the patient and/or the severity of the disease, suggesting that miRNAs may contribute to the regulation of inflammation in UC and could be useful biomarkers in the surveillance of disease severity.