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Published in: Journal of Neuro-Oncology 3/2018

01-02-2018 | Laboratory Investigation

Bioinformatic analysis of gene expression and methylation regulation in glioblastoma

Authors: Wen Wang, Zheng Zhao, Fan Wu, Haoyuan Wang, Jiangfei Wang, Qing Lan, Jizong Zhao

Published in: Journal of Neuro-Oncology | Issue 3/2018

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Abstract

Different gene expression and methylation profiles are identified in glioblastoma (GBM). To screen the differentially expressed genes affected by DNA methylation modification and further investigate their prognostic values for GBMs. We included The Cancer Genome Atlas (TCGA) RNA sequencing (676) and DNA methylation (Illumina Human Methylation 450K; 657) databases to detect the gene expression and methylation profiles. Chinese Glioma Genome Atlas (CGGA) RNA sequencing database and TCGA DNA methylation (Illumina Human Methylation 27K; 283) was included for validation. Gene expression and DNA methylation statues were identified using principal components analysis (PCA). A total of 3365 differentially expressed genes were identified. Among them, 2940 genes showed low methylation and high expression, while 425 genes showed high methylation and low expression in GBMs. An eight-gene (C9orf64, OSMR, MDK, MARVELD1, PTRF, MYD88, BIRC3, RPP25) signature was established to divide GBM patients into two groups based on the cut-off point (27.24). The high risk group had shorter overall survival (OS) than low risk group (median OS 15.77 vs. 10.61 months; P = 0.0002). Moreover, the different clinical and molecular features were shown between two groups. These findings could be validated in additional datasets. The differentially expressed genes affected by DNA methylation modification were detected. Our results showed that the eight-gene signature has independently prognostic value for GBM patients.
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Metadata
Title
Bioinformatic analysis of gene expression and methylation regulation in glioblastoma
Authors
Wen Wang
Zheng Zhao
Fan Wu
Haoyuan Wang
Jiangfei Wang
Qing Lan
Jizong Zhao
Publication date
01-02-2018
Publisher
Springer US
Published in
Journal of Neuro-Oncology / Issue 3/2018
Print ISSN: 0167-594X
Electronic ISSN: 1573-7373
DOI
https://doi.org/10.1007/s11060-017-2688-1

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