title: Comprehensive DNA Methylation and Gene Expression Profiling in Differentiating Human Adipocytes.
abstract: Insight into the processes controlling adipogenesis is important in the battle against the obesity epidemic and its related disorders. The transcriptional regulatory cascade involved in adipocyte differentiation has been extensively studied, however, the mechanisms driving the transcription activation are still poorly understood. In this study, we explored the involvement of DNA methylation in transcriptional regulation during adipocyte differentiation of primary human mesenchymal stem cells (hMSCs). Genome-wide changes in DNA methylation were measured using the Illumina 450K BeadChip. In addition, expression of 84 adipogenic genes was determined, of which 43 genes showed significant expression changes during the differentiation process. Among these 43 differentially expressed genes, differentially methylated regions (DMRs) were detected in only three genes. By comparing genome-wide DNA methylation profiles in undifferentiated and differentiated adipocytes 793 significant DMRs were detected. Pathway analysis revealed the adipogenesis pathway as the most statistically significant, although only a small number of genes were differentially methylated. Genome-wide DNA methylation changes for single probes were most often located in intergenic regions, and underrepresented close to the transcription start site. In conclusion, DNA methylation remained relatively stable during adipocyte differentiation, implying that changes in DNA methylation are not the underlying mechanism regulating gene expression during adipocyte differentiation. J. Cell. Biochem. 117: 2707-2718, 2016. © 2016 Wiley Periodicals, Inc.
authors.affiliation: Sub-Department of Environmental Technology, Wageningen University, P.O. Box 17, 6700 AA, Wageningen, The Netherlands.|Division of Human Nutrition, Wageningen University, P.O. Box 8129, 6700 EV, Wageningen, The Netherlands.
authors.forename: Myrthe W
authors.initials: MW
authors.lastname: van den Dungen
authors.affiliation: Sub-Department of Environmental Technology, Wageningen University, P.O. Box 17, 6700 AA, Wageningen, The Netherlands.|Marine Animal Ecology Group, Wageningen University, P.O. Box 338, 6700 AH, Wageningen, The Netherlands.
authors.forename: Albertinka J
authors.initials: AJ
authors.lastname: Murk
authors.affiliation: Sub-Department of Environmental Technology, Wageningen University, P.O. Box 17, 6700 AA, Wageningen, The Netherlands.
authors.forename: Dieuwertje E
authors.initials: DE
authors.lastname: Kok
authors.affiliation: Sub-Department of Environmental Technology, Wageningen University, P.O. Box 17, 6700 AA, Wageningen, The Netherlands. Wilma.Steegenga@wur.nl.
authors.forename: Wilma T
authors.initials: WT
authors.lastname: Steegenga
mesh_terms: D017667:Adipocytes / Q000166:cytology* / Q000378:metabolism*; D050156:Adipogenesis / Q000235:genetics; D015153:Blotting, Western; D002454:Cell Differentiation; D019175:DNA Methylation; D020869:Gene Expression Profiling; D005786:Gene Expression Regulation; D015894:Genome, Human; D059014:High-Throughput Nucleotide Sequencing; D006801:Humans; D059630:Mesenchymal Stem Cells; D011401:Promoter Regions, Genetic; D012333:RNA, Messenger / Q000235:genetics; D060888:Real-Time Polymerase Chain Reaction; D020133:Reverse Transcriptase Polymerase Chain Reaction; D014407:Tumor Cells, Cultured
chemical_list: D012333:RNA, Messenger
keywords: ADIPOCYTE DIFFERENTIATION; DNA METHYLATION; GENE EXPRESSION; HUMAN MESENCHYMAL STEM CELLS; ILLUMINA 450K BEADCHIP