title: Identification of differentially expressed genes regulated by transcription factors in glioblastomas by bioinformatics analysis.
abstract: The present study aimed to identify differentially expressed genes (DEGs) regulated by transcription factors (TFs) in glioblastoma, by conducting a bioinformatics analysis. The results of the present study may provide potential therapeutic targets that are involved in the development of glioblastoma. The GSE4290 raw data set was downloaded from the Gene Expression Omnibus database, and consisted of 23 non‑tumor samples and 77 glioblastoma (grade 4) tumor samples. Robust Multichip Averaging was used to identify DEGs between the glioblastoma and non‑tumor samples. Functional enrichment analysis of the DEGs was also performed. Based on the TRANSFAC® database, TFs associated with the glioblastoma gene expression profile were used to construct a regulatory network. Furthermore, trimmed subnets were identified according to calculated Z‑scores. A total of 676 DEGs were identified, of which 190 were upregulated and 496 were downregulated. Gene Ontology analysis demonstrated that the majority of these DEGs were functionally enriched in synaptic transmission, regulation of vesicle‑mediated transport and ion‑gated channel activity. In addition, the enriched Kyoto Encyclopedia of Genes and Genomes pathway included neuroactive ligand‑receptor interaction, calcium signaling pathway, p53 signaling pathway and cell cycle. Based on the TRANSFAC® database, transcriptional regulatory networks with 2,246 nodes and 4,515 regulatory pairs were constructed. According to the Z‑scores, the following candidate TFs were identified: TP53, SP1, JUN, STAT3 and SPI1; alongside their downstream DEGs. TP53 was the only differentially expressed TF. These candidate TFs and their downstream DEGs may have important roles in the progression of glioblastoma, and could be potential biomarkers for clinical treatment.
authors.affiliation: Department of Neurosurgery, China‑Japan Union Hospital of Jilin University, Changchun, Jilin 130033, P.R. China.
authors.forename: Bo
authors.initials: B
authors.lastname: Wei
authors.affiliation: Department of Ophthalmology, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China.
authors.forename: Le
authors.initials: L
authors.lastname: Wang
authors.affiliation: Department of Neurosurgery, China‑Japan Union Hospital of Jilin University, Changchun, Jilin 130033, P.R. China.
authors.forename: Chao
authors.initials: C
authors.lastname: Du
authors.affiliation: Department of Neurosurgery, China‑Japan Union Hospital of Jilin University, Changchun, Jilin 130033, P.R. China.
authors.forename: Guozhang
authors.initials: G
authors.lastname: Hu
authors.affiliation: Department of Neurosurgery, China‑Japan Union Hospital of Jilin University, Changchun, Jilin 130033, P.R. China.
authors.forename: Lina
authors.initials: L
authors.lastname: Wang
authors.affiliation: Department of Neurology, Jilin Oil Field General Hospital, Songyuan, Jilin 131200, P.R. China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Jin
authors.affiliation: Department of Neurosurgery, China‑Japan Union Hospital of Jilin University, Changchun, Jilin 130033, P.R. China.
authors.forename: Daliang
authors.initials: D
authors.lastname: Kong
mesh_terms: D000465:Algorithms; D019295:Computational Biology / Q000379:methods; D030541:Databases, Genetic; D015972:Gene Expression Regulation, Neoplastic; D053263:Gene Regulatory Networks; D005909:Glioblastoma / Q000235:genetics* / Q000378:metabolism* / Q000473:pathology; D006801:Humans; D060787:Neoplasm Grading; D014157:Transcription Factors / Q000378:metabolism*
chemical_list: D014157:Transcription Factors