Glioma is derived from the oncogenic transformation of brain and spinal cord glial cells, and is one of the most common primary brain tumors. Tunicamycin (TUN) can significantly inhibit glioma growth and aggressiveness by promoting apoptosis in glioma cells. The purpose of the present
study was to investigate the effects of TUN on growth of glioma cells and examine the TUNmediated signaling pathway. The inhibitory effects of TUN on apoptosis, growth, aggressiveness and cell cycle arrest of glioma tumor cells were determined by western blotting, reverse transcription quantitative
polymerase chain reaction, apoptotic assays and immunofluorescence. The results demonstrated that treatment with TUN suppressed growth, migration and invasion of glioma carcinoma cells. In addition, TUN treatment induced apoptosis of glioma cells through downregulation of Bcl2 and P53 expression
levels. Findings also indicated that TUN suppressed proliferation and arrested the glioma cells in the S phase of the cell cycle. Further analysis of the mechanisms of TUN demonstrated that TUN treatment upregulated the expression levels of maternally expressed gene (MEG)3, wnt and βcatenin
in glioma cells. Furthermore, knockdown of MEG3 expression reversed the TUNdecreased wnt/βcatenin signaling pathway, which subsequently also reversed the TUNinhibited growth and aggressiveness of glioma cells. In conclusion, the findings in the present study indicated that TUN treatment
inhibited growth and aggressiveness through MEG3mediated wnt/βcatenin signaling, suggesting that TUN may be an efficient anticancer agent for the treatment of glioma.
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Document Type: Research Article
Department of Neurosurgery, Jinshazhou Hospital of Traditional Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510000, P.R. China
Clinical Skills Training Center, Guangzhou Medical University, Guangzhou, Guangdong 510182, P.R. China
Department of Orthopedics, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510000, P.R. China
Publication date: January 1, 2018
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Oncology Letters is a monthly, peer-reviewed journal, available in print and online, that focuses on all aspects of clinical oncology, as well as in vitro and in vivo experimental model systems relevant to the mechanisms of disease.
The principal aim of Oncology Letters is to provide the prompt publication of original studies of high quality that pertain to clinical oncology, chemotherapy, oncogenes, carcinogenesis, metastasis, epidemiology and viral oncology in the form of original research, reviews and case reports.
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