GRPEL2 and central nervous system cancer: To investigate the role of GRPEL2 mRNA expression in glioma, we extracted the transcription data from The Cancer Genome Atlas (TCGA; UCSC Xena; https://xenabrowser.net/, accessed on 2 March 2021) and the Chinese Glioma Genome Atlas (CGGA; http://www.cgga.org.cn/, accessed on 2 March 2021).