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Genome-wide DNA methylation profiling in nonalcoholic fatty liver reveals predictive aberrant methylation in PRKCE and SEC14L3 promoters.
Digestive and Liver Disease 2021 June 8
BACKGROUND: Optimal non-invasive biomarkers for diagnosis and treatment of nonalcoholic fatty liver disease (NAFLD) remain to be identified.
AIMS: To identify potential DNA methylation biomarkers for NAFLD.
METHODS: Genome-wide DNA methylation profiling was performed to identify differentially methylated CpG sites in peripheral blood leukocytes. Differentially methylated regions were validated using the MassCLEAVE assay. The expression levels of candidate genes were explored by Gene Expression Omnibus database.
RESULTS: The hypomethylation of PRKCE CpG 4.5 and CpG 18.19 was associated with nonalcoholic fatty liver (NAFL), the odds ratio (OR) and 95% confidence interval (CI) were 0.129 (0.026-0.639) and 0.231 (0.069-0.768). The methylation level of CpG 1.2 and average methylation level of SEC14L3 were correlated with NAFL, with OR (95% CI) being 0.283 (0.093-0.865) and 0.264 (0.087-0.799). PRKCE CpG 4.5 and cg17802464 of SEC14L3 were correlated with body mass index, waist circumference, total triglyceride, high-density lipoprotein cholesterol, alanine aminotransferase and aspartate aminotransferase. All selected datasets showed high expression levels of PRKCE and SEC14L3 in patients with NAFLD.
CONCLUSIONS: Our findings suggest that the hypomethylation of PRKCE and SEC14L3 promoters represent attractive biomarkers for NAFLD. Further studies are warranted to validate these biomarkers as molecular tools for diagnosis of NAFLD and therapeutic targets.
AIMS: To identify potential DNA methylation biomarkers for NAFLD.
METHODS: Genome-wide DNA methylation profiling was performed to identify differentially methylated CpG sites in peripheral blood leukocytes. Differentially methylated regions were validated using the MassCLEAVE assay. The expression levels of candidate genes were explored by Gene Expression Omnibus database.
RESULTS: The hypomethylation of PRKCE CpG 4.5 and CpG 18.19 was associated with nonalcoholic fatty liver (NAFL), the odds ratio (OR) and 95% confidence interval (CI) were 0.129 (0.026-0.639) and 0.231 (0.069-0.768). The methylation level of CpG 1.2 and average methylation level of SEC14L3 were correlated with NAFL, with OR (95% CI) being 0.283 (0.093-0.865) and 0.264 (0.087-0.799). PRKCE CpG 4.5 and cg17802464 of SEC14L3 were correlated with body mass index, waist circumference, total triglyceride, high-density lipoprotein cholesterol, alanine aminotransferase and aspartate aminotransferase. All selected datasets showed high expression levels of PRKCE and SEC14L3 in patients with NAFLD.
CONCLUSIONS: Our findings suggest that the hypomethylation of PRKCE and SEC14L3 promoters represent attractive biomarkers for NAFLD. Further studies are warranted to validate these biomarkers as molecular tools for diagnosis of NAFLD and therapeutic targets.
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