Comprehensive gene expression analysis after ERH gene knockdown in human bladder cancer T24 cell lines.

INTRODUCTION

In this article, we utilized Ingenuity® Pathway Analysis (IPA®) bioinformatics analysis software and Metascape® bioinformatics analysis website tools to analyse the possible mechanism of ERH affecting tumourigenesis (proliferation and apoptosis) in bladder cancer (BC) T24 cells.

METHODS

The ERH gene was knocked down, and BC T24 cells were divided into ERH normal and knockdown groups. Affymetrix® gene expression microarrays were performed to obtain a differentially expressed gene list (DEGL) between the 2 groups. IPA® data analyses contain five modules: disease and function analysis, upstream analysis, regulator effects analysis, canonical pathway analysis and molecular network analysis. The results of Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analyses were analysed by Metascape®.

RESULTS

The results of the gene expression profiling chip and the DEGL showed that 344 genes were upregulated and 254 genes were downregulated. The IPA® and Metascape® pathway analyses showed that the ERH gene may affect proliferation and apoptosis by affecting the apoptosis, cell cycle, Toll-like receptor (TLR), NF-κB or TGF-beta signalling pathways. Upstream analysis determined that the ERH gene may regulate TNF and NK-κB in the BC T24 cell lines. The ERH gene may be involved in the "cell death and survival" molecular network in BC T24 cells. ERH may be a regulator of KITLG through TNF.

CONCLUSIONS

The ERH gene may affect apoptosis through the TLR, NF-κB, TNF or TGF-beta signalling pathways in BC T24 cells, and may be a regulator of KITLG to ultimately activate the growth of malignant tumours.