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pmid:31410310
Identification of crucial genes based on expression profiles of hepatocellular carcinomas by bioinformatics analysis.
Ze-Kun Liu · Ren-Yu Zhang · Yu-Le Yong · Zhi-Yun Zhang · Can Li · Zhi-Nan Chen · Huijie Bian
PeerJ · 2019 doi:10.7717/peerj.7436
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Complete file
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The aims of our study were to find crucial genes involved in HCC through multidimensional methods and revealed potential molecular mechanisms. Here, we reported the gene expression profile GSE121248 findings from 70 HCC and 37 adjacent normal tissues, all of which had chronic hepatitis B virus (HBV) infection, we were seeking to identify the dysregulated pathways, crucial genes and therapeutic targets implicated in HBV-associated HCC. We found 164 differentially expressed genes (DEGs) (92 downregulated genes and 72 upregulated genes). Gene ontology (GO) analysis of DEGs revealed significant functional enrichment of mitotic nuclear division, cell division, and the epoxygenase P450 pathway. Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis showed that the DEGs were mainly enriched in metabolism, cell cycle regulation and the p53 signaling pathway. The Mcode plugin was calculated to construct a module complex of DEGs, and the module was mainly enriched in cell cycle checkpoints, RHO GTPase effectors and cytochrome P450. Considering a weak contribution of each gene, gene set enrichment analysis (GSEA) was performed, revealing results consistent with those described above. Six crucial proteins were selected based on the degree of centrality, including NDC80, ESR1, ZWINT, NCAPG, ENO3 and CENPF. Real-time quantitative PCR analysis validated the six crucial genes had the same expression trend as predicted. Furthermore, the methylation data of The Cancer Genome Atlas (TCGA) with HCC showed that mRNA expression of crucial genes was negatively correlated with methylation levels of their promoter region. The overall survival reflected that high expression of NDC80, CENPF, ZWINT, and NCAPG significantly predicted poor prognosis, whereas ESR1 high expression exhibited a favorable prognosis. 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false, "licence_read": false}}, {"id": "asset:table:pmid:31410310:1", "role": "table", "format": "jats-table", "media_type": "application/vnd.jats.table+json", "uri": null, "sha256": "sha256:840b388db0123ec9e7e961560d37a1047657567d86ded4146165ab9ea0cbf306", "bytes": 1459, "access": "open", "state": "verified", "reader": "read_table", "reader_status": "available", "identifier": "section[14]/table-wrap[1]#table-1", "version": null, "note": "The top 10 proteins ranked based on the node centrality of the PPI network.", "structure": {"pmcid": "PMC6689388", "section_index": 14, "section_title": "Protein–protein interaction network of DEGs", "row_count": 12, "column_count": 9}, "table": {"label": "Table 1", "caption": "The top 10 proteins ranked based on the node centrality of the PPI network.", "rows": [["Rank", "Degree centrality", "Betweenness centrality", "Closeness centrality", "Eigenvector centrality"], ["", "Gene symbol", "Expression in HCC", "Gene symbol", "Expression in HCC", "Gene 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"up-regulated", "BUB1B", "up-regulated"], ["10", "NCAPG", "up-regulated", "ENO3", "down-regulated", "NEK2", "up-regulated", "MAD2L1", "up-regulated"]], "row_count": 12, "column_count": 9, "numeric_cells": 14, "header_rows": 2, "locator": "section[14]/table-wrap[1]#table-1"}}, {"id": "asset:table:pmid:31410310:2", "role": "table", "format": "jats-table", "media_type": "application/vnd.jats.table+json", "uri": null, "sha256": "sha256:93bdb1d7a555c3bbcac7e618665231194274b3e868749be5a4680c77d2aaef58", "bytes": 1503, "access": "open", "state": "verified", "reader": "read_table", "reader_status": "available", "identifier": "section[16]/table-wrap[1]#table-2", "version": null, "note": "Validation of the relationship between methylation and mRNA expression of crucial genes in TCGA.", "structure": {"pmcid": "PMC6689388", "section_index": 16, "section_title": "Validation of mRNA expression of crucial genes", "row_count": 21, "column_count": 7}, "table": {"label": "Table 2", "caption": "Validation of the relationship between methylation and mRNA expression of crucial genes in TCGA.", "rows": [["Crucial gene", "mRNA expression in HCC", "Methylation status in HCC"], ["", "mRNA expression", "P-value", "Methylation", "Position", "Pearson correlation", "P-value"], ["NDC80", "High expression", "<2.2E-16", "Hypomethylation", "chr18:2571606", "−0.150", "1.64E-03"], ["chr18:2571747", "−0.282", "<2.2E-16"], ["ZWINT", "High expression", "<2.2E-16", "Hypomethylation", "chr10:58121299", "−0.142", "0.03"], ["NCAPG", "High expression", "<2.2E-16", "Hypomethylation", "chr4:17812759", "−0.236", "2.26E-11"], ["chr4:17813558", "−0.544", "<2.2E-16"], ["CENPF", "High expression", "<2.2E-16", "Hypomethylation", "chr1:214776904", "−0.243", "1.48E-12"], ["chr1:214777596", "−0.304", "1.60E-14"], ["chr1:214780880", "−0.174", "6.27E-11"], ["chr1:214781456", "−0.154", "1.38E-04"], ["chr1:214781663", "−0.217", "1.21E-05"], ["chr1:214788192", "−0.150", "7.40E-07"], ["ESR1", "Low expression", 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