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M6A-mRNA&lncRNA Epitranscriptomic Microarray analysis for human liver tissues of healthy, HBV-infected with and without cirrhosis donors.

ABSTRACT: The samples of human liver tissues from the healthy donors, the HBV-infected patients without cirrhosis, and the HBV-infected patients with cirrhosis were collected. The tissues were then analyzed by the m6A-mRNA&lncRNA Epitranscriptomic miroarray. The Goal of this experiment was to determine the different of gene expression and m6a methylation of liver tissues among the healthy donors, the HBV-infected patients with and without cirrhosis.

ORGANISM(S): Homo sapiens

PROVIDER: GSE252249 | GEO | 2024/05/21

REPOSITORIES: GEO

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Project description:Purpose: Aberrantly methylated DNA are hallmarks for many cancers, HCC included. Tumor shed its DNA into circulation stream, and serum DNA methylation analysis is a less-invasive and accessable way to judge the primary tumor status. The goals of this study are to compare DNA methylation profiling in serum cell-free DNA from different stages of HCC progression including healthy control, chronic HBV carrier, HBV-related liver Cirrhosis and HCC, to establish HCC development-related aberrnat DNA methylation patterns. Methods: MBD methylCap/seq was carried out to screen differentially methylated CpG islands in serum cell-free DNA on four different stage of HBV-related HCC development. MSP and multiplex-BSP validation was performed using independent serum DNA or tumor and adjacent tissues. Results: Using a MBD methylCap/seq platform, we produced 33- to 37- million raw reads per sample and mapped them, in about half of the raw reads, to human genome(build h19) in the serum cf DNA of healthy control, HBV carrier, HBV cirrhosis and HCC. The mapped reads formed 180k to 260k peaks per sample, with 160 k common peaks shared by four samples. After subtraction of the common peaks, there left 51k, 107k and 78 k DMRs representing hypermethylations, in HBV carrier, HBV cirrhosis and HCC, respectively. We define those DMRs as early, middle and late when these DMRS occurred and maintained in HBV carrier, HBV cirrhosis and HCC, which including 27k, 24k and 19k DMRs, corresponding to 1,416, 1,337, 1,006 genes. GO analysis of them revealed gene categories and pathways associated with tumorogenenisis related process Conclusions: Our study represents the first detailed analysis of serum cf-DNA methylation profiling in the progression of HBV related HCC development. The processed data analysis here offers a comprehensive evaluation of DNA methylation in serum cf DNA. We conclude that MBD methylCap/seq based methylation profiling would benefit epigenetic research in HCC.

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M6A-mRNA&lncRNA Epitranscriptomic Microarray analysis for human liver tissues of healthy, HBV-infected with and without cirrhosis donors.

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