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Raymond M Moore1, Zhifu Sun1, Brian D Juran2, Konstantinos N Lazaridis2
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1Division of Biomedical Statistics & Informatics Mayo Clinic, Rochester, MN 55905, USA.
2Division of Gastroenterology & Hepatology, College of Medicine, Mayo Clinic, Rochester, MN 55905, USA.
Abstract
Aim: To profile DNA methylation changes of primary biliary cholangitis (PBC) and primary sclerosing cholangitis (PSC). Materials & methods: Patients with: PBC, PSC with inflammatory bowel disease (IBD), PSC without IBD, and age-, sex-matched controls were profiled for methylomes of peripheral blood by reduced representation bisulfite sequencing. Differentially methylated CpG (DMC) and differentially methylated region (DMR) were detected and compared. Results: We identified consistently altered DMCs and DMRs across diseases with involvement in key pathways. Many similarities noted between two subtypes of PSC, interestingly few existed between PBC and PSC. DMRs were highly enriched with transcription factor binding. Top DMC changes were validated in liver tissue of an independent cohort. Conclusion: Methylome profiling provides insights to PBC and PSC.
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