Anti-MBD1 monoclonal antibody

The normal course of DNA methylation depends on the correct functioning of the DNA methylation machinery, which include DNA methyltransferase enzymes (DNMTs) and methyl-CpG-binding domain proteins (MBDs). So far, little is known about the activity of these components during adipogenesis in the pig. The aim of this study was to analyze the expression of ten genes (DNMT1, DNMT3a, DNMT3b, MBD1, MBD2, MBD3, MBD4, MeCP2, UHRF1, and CBX5) during in vitro differentiation into adipocytes of porcine mesenchymal stem cells derived from adipose (AD-MSC) and from bone marrow tissue (BM-MSC). We found that, in undifferentiated cells, the global methylation level was higher in BM-MSC than in AD-MSC, but had similar levels in adipocytes. The transcript level of the DNMT1 gene increased at the beginning of adipogenesis and then decreased, while DNMT3a and DNMT3b transcripts increased during differentiation. All the examined MBD genes show similar expression patterns within the studied system (AD-MSC and BM-MSC). The transcript abundance of UHRF1 and CBX5 decreased in both systems. The changes in the expression patterns of these genes points to the dynamic nature of DNA methylation during porcine adipogenesis. (C) 2019 Elsevier Inc. All rights reserved.

Methylation at the DNA sequence 5'-CpG is required for mouse development. MeCP2 and MBD1 (formerly PCM1) are two known proteins that bind specifically to methylated DNA via a related amino acid motif and that can repress transcription. We describe here three novel human and mouse proteins (MBD2, MBD3, and MBD4) that contain the methyl-CpG binding domain. MBD2 and MBD4 bind specifically to methylated DNA in vitro. Expression of MBD2 and MBD4 tagged with green fluorescent protein in mouse cells shows that both proteins colocalize with foci of heavily methylated satellite DNA. Localization is disrupted in cells that have greatly reduced levels of CpG methylation. MBD3 does not bind methylated DNA in vivo or in vitro. MBD1, MBD2, MBD3, and MBD4 are expressed in somatic tissues, but MBD1 and MBD2 expression is reduced or absent in embryonic stem cells which are known to be deficient in MeCP1 activity, The data demonstrate that MBD2 and MBD4 bind specifically to methyl-CpG in vitro and in vivo and are therefore likely to be mediators of the biological consequences of the methylation signal.