Journal: Cancers
Article Title: Unique Role of Histone Methyltransferase PRDM8 in the Tumorigenesis of Virus-Negative Merkel Cell Carcinoma
doi: 10.3390/cancers12041057
Figure Lengend Snippet: ( A ) Heatmap shows differentially expressed microRNA (miRNAs) in VP- vs. VN-MCC cell lines from microarray data analysis (false discovery rate ( FDR ) <0.05). ( B ) miRNA pathway analysis using mirPath v.3 in the top differentially expressed miRNAs, showing enriched pathways (i.e., viral carcinogenesis and miRNAs involved in cancer). ( C ) Intersection of top upregulated miRNAs in VP-MCC with top miRNAs that could potentially target PRDM8 (scored using miRWalk) indicates miR-20a-5p as the only miRNA that can target PRDM8 and at the same time is downregulated in VN-MCCs. ( D ) Overexpressing miR-20a-5p using miRNA mimic decreases PRDM8 expression level significantly in MCC13 cells. ( E ) Immunoblot shows that PRDM8 protein levels are decreased upon miR-20a-5p overexpression. Ectopic overexpression of miR-20a-5p also led to the decrease in H3K9me3 levels. Histone H3 is used as the control. ( F ) Colony formation assay performed in MCC13 cells compared to miR-20a-5p-overexpressed MCC13 cells indicated lower clonogenicity capability upon overexpression of miR-20a-5p. Representative figures of colonies in MCC13 cells are shown. * p -value < 0.05.
Article Snippet: Gene expression profiling was performed in four Merkel cell carcinoma cell lines, using the Illumina RNA microarray platform.
Techniques: Microarray, Expressing, Western Blot, Over Expression, Colony Assay