Fig 1: The DNMT1/PCNA/UHRF1 disruption in brain, lung, mammary and mesothelioma cells induces global DNA hypomethylation.(A) Schematic representation of the effect of the UP chimera protein on the DNMT1/PCNA/UHRF1 complex. (B) Proximity ligation in situ assay (P-LISA) monitoring the number of DNMT1/PCNA dots in Astro#40 (Clonexpress, Gaithersburg, US), MCF10A (ATCC, CRL-10317), Wi38 (ATCC, CRL-75) and Met5A (ATCC, CRL-9444) after transfection by the pUP or pCt (Control) plasmid. Pictures are obtained by using ApoTome microscopic system. One red dot represents one DNMT1/PCNA interaction. (C) Graphs illustrate the number of DNMT1/PCNA dots according to the P-LISA analyses, the 5-methylcytosine number via the use of the Methylamp Global DNA Methylation Quantification kit (Epigentek-Euromedex, France), and the expression level of DNMT1 and PCNA (ELISA methods). The amount of DNMT1, UHRF1 and PCNA recruited on methylated chromatin was determined by ELISA realized from methylated chromatin issue to MeDIP (Active Motif, France). *: p < 0.05.
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