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Ke Xu, Chun Qiu, Hua Pei, Muhammad Aamer Mehmood, Huamin Wang, Liang Li, Qianfeng Xia
Glioblastoma (GBM) is the most aggressive brain tumor in adults with the highest mortality rate. Despite advances achieved in treatment and research, the median survival for patients with GBM remains <1.5 years. This figure prompted the present study to identify novel genes associated with GBM development and progression to ultimately improve GBM treatment. The current study sought to determine the role of homeobox B3 (HOXB3) in GBM cell invasion and proliferation. HOXB3 was highly expressed in GBM tissues and glioma cell lines...
March 2018: Oncology Letters
Chenlong Li, Hanguang Jing, Guangtao Ma, Peng Liang
Allicin is an extract purified from Allium sativum (garlic), and previous research has indicated that Allicin has an inhibitory effect on many kinds of tumor cells. The aim of the present study was to explore the anticancer activity of Allicin on human glioma cells and investigate the underlying mechanism. MTT and colony-formation assays were performed to detect glioma cell proliferation, and explore the effect of Allicin at various doses and time-points. The apoptosis of glioma cells was measured by fluorescence microscopy with Hoechst 33258 staining, and then flow cytometry was used to analyzed changes in glioma cell apoptosis...
February 2, 2018: Molecular Medicine Reports
Zheng Liu, Jian Song, Yue Wu, Shun Yao, Guo-Zheng Xu, Bo Diao
Transcription factor 4 (TCF4) is a member of the T-cell factor/lymphoid enhancer factor (TCF/LEF) transcription factor family in the Wnt/β‑catenin signaling pathway. The alternative splicing of TCF4 has been reported to exhibit potential carcinogenic properties in various cancer types. In the present study, TCF4 isoforms were cloned and identified in three human glioma cell lines, with the majority of splicing regions being exons 4, 5, 14, 15, and 16. Using MTT assays, it was demonstrated that the overexpression of TCF4 isoforms inhibits the proliferation of U251 cells...
February 2, 2018: Molecular Medicine Reports
Zhiwei Xia, Dongxu Qiu, Jun Deng, Xiao Jiao, Ronghe Yang, Zhongyi Sun, Xin Wan, Jing Li
MicroRNAs (miRs) have been found to play key roles in various human cancers, but the detailed regulatory mechanism of miR-98 in glioma remains largely unknown. The findings of the present study demonstrated that miR-98 was frequently downregulated in glioma tissues and cell lines (U87, U251, U373 and SHG44), and the decreased miR-98 levels were associated with DNA methylation. Treatment with 5-Aza-20-deoxycytidine, a DNA methyltransferase inhibitor, significantly increased the expression of miR-98 in glioma cells...
February 6, 2018: International Journal of Molecular Medicine
Feng Liu, Kaya Xu, Hua Yang, Yuming Li, Jian Liu, Jixiang Wang, Zhizhong Guan
Gliomas are the most common type of primary brain tumor in adults, where more than half of the cases are malignant, and the prognosis is poor. The early viral 1A (E1A) protein has been widely recognized to be essential for adenoviral replication and production of progeny virions in human cells, a process that is regulated by human telomerase reverse transcriptase. The p53 gene, as a tumor suppressor, regulates diverse cellular processes, including cell cycle arrest, cell autophagy, senescence and apoptosis...
March 2018: Oncology Letters
Hongfan Zhu, Diangang Chen, Jinliang Tang, Changlin Huang, Shengqing Lv, Donglin Wang, Guanghui Li
The epidermal growth factor receptor (EGFR) is often amplified in glioma, with the most common extracellular domain mutation being EGFR variant III (EGFRvIII). Abnormal EGFRvIII signaling has been shown to be important in driving tumor progression. Centrosomal protein 55 (CEP55), a member of the centrosomal relative proteins family, participates cytokinesis in the cell cycle. It exists in a few normal tissues and various tumor cells. The expression and function of CEP55 in human glioma cells need to investigate...
February 2018: Oncology Letters
Bing Li, Chun Zhou, Liang Yi, Lunshan Xu, Minhui Xu
Glioma is a malignant tumor of the glial tissue that is difficult to excise through surgery, with poor patient prognosis. The use of chemotherapeutic drugs alone to treat glioma following surgery results in a high probability of sequelae, such as tumor recurrence. The present study investigated the effects of a novel treatment combination on glioma cells and determined the molecular mechanisms underlying its action. The effect of temozolomide (TMZ) combined with rapamycin (RAPA) on the TMZ-induced autophagic death of U251 glioma cells was examined...
February 2018: Oncology Letters
Jun Du, Ruijie Wang, Litian Yin, Yuejun Fu, Yuqing Cai, Zhiyun Zhang, Aihua Liang
Temozolomide (TMZ) is a drug that has been demonstrated to improve the survival time of patients with glioblastoma multiforme (GBM) when administered with concomitant radiotherapy. However, chemoresistance is one of the major obstacles in the treatment of GBM. In the present study, an MTT assay and flow cytometry were used to demonstrate that chlorotoxin-like toxin in the venom of the scorpion Buthus martensii Kirsch (BmK CT) markedly inhibited cell proliferation and induced apoptosis in U251 cells when combined with TMZ...
February 2018: Oncology Letters
Lian Wang, Zhouchun Shang, Yang Zhou, Xinyu Hu, Yihong Chen, Yantao Fan, Xiaoyu Wei, Liang Wu, Qiujuan Liang, Jun Zhang, Zhengliang Gao
Metabolic reprogramming is pivotal to sustain cancer growth and progression. As such dietary restriction therapy represents a promising approach to starve and treat cancers. Nonetheless, tumors are dynamic and heterogeneous populations of cells with metabolic activities modulated by spatial and temporal contexts. Autophagy is a major pathway controlling cell metabolism. It can downregulate cell metabolism, leading to cancer cell quiescence, survival, and chemoresistance. To understand treatment dynamics and provide rationales for better future therapeutic strategies, we investigated whether and how autophagy is involved in the chemo-cytotoxicity and -resistance using two commonly used human glioblastoma (GBM) cell lines U87 and U251 together with primary cancer cells from the GBM patients...
February 12, 2018: Cell Death & Disease
Yuling Diao, Baozhe Jin, Liyong Huang, Wenke Zhou
This study purposed to explore the correlation between miR-129-5p and TGIF2 and their impacts on glioma cell progression. Differentially expressed miRNA was screened through microarray analysis. MiR-129-5p expression levels in glioma tissues and cells were measured by qRT-PCR. CCK-8 assay, flow cytometer, transwell assay and wound-healing assay were employed to detect cell proliferation, apoptosis and cycle, invasiveness and migration, respectively. Dual-luciferase reporting assay was performed to confirm the targeted relationship between miR-129-5p and TGIF2...
February 12, 2018: Journal of Cellular and Molecular Medicine
Jing Lin, Aihui Ji, Guanzhong Qiu, Huaizhi Feng, Jian Li, Shuo Li, Yongxiang Zou, Yong Cui, Chaoli Song, Hua He, Yicheng Lu
F-box and WD repeat domain-containing 7(FBW7) is a SCF-type E3 ubiquitin ligase targeting a multitude of oncoproteins for degradation. Acting as one of the most important tumor suppressor it is frequently inactivated in various tumors. In this study we aimed to evaluate the relationship of FBW7 with glioma pathology and prognosis, and examine its effect in glioma malignancies and temozolomide(TMZ)-based therapy. Clinical tissues and TCGA database analysis revealed FBW7 expression was correlated inversely with glioma histology and positively with patient survival time...
February 10, 2018: Cancer Science
Zhaotao Wang, Zhi Liu, Guoyong Yu, Xiaohu Nie, Weiqiang Jia, Ru-En Liu, Ruxiang Xu
Paeoniflorin (PF) is a polyphenolic compound derived from Radix Paeoniae Alba thathas anti-cancer activities in a variety of human malignancies including glioblastoma. However, the underlying mechanisms have not been fully elucidated. Epithelial to mesenchymal transition (EMT), characterized as losing cell polarity, plays an essential role in tumor invasion and metastasis. TGFβ, a key member of transforming growth factors, has been demonstrated to contribute to glioblastoma aggressiveness through inducing EMT...
February 8, 2018: Neurochemical Research
Lei Chen, Yuhai Wang, Jianqing He, Chunlei Zhang, Junhui Chen, Dongliang Shi
MiR-152 and lncRNA H19 have been frequently implicated in various cellular process including cell proliferation, invasion, angiogenesis and apoptosis. However, the interaction between miR-152 and H19 in glioma has never been reported. qRT PCR was used to examine the expression of miR 152 and H19 in human glioma cell lines and normal human astrocytes (NHAs) cells The interaction between miR 152 and lncRNA H19 were assessed by dual luciferase reporter assay. MTT assay and transwell invasion assay were used to determine the proliferation and invasion of U251 and U87 cells...
February 8, 2018: Oncology Research
Jingang Hou, Changhao Cui, Sunchang Kim, Changkeun Sung, Chulhee Choi
Senescence is one of the hallmarks of aging and identified as a potential therapeutic target in the treatment of aging and aging-related diseases. Senescent cells accumulate with age in a variety of human tissues where they develop a complex senescence-associated secretory phenotype (SASP). SASP in brain could contribute to age-related inflammation and chronic neurodegenerative diseases. We confirmed that senescent astrocytes express a characteristic of SASP in vitro by human cytokine antibody array. Ginsenoside F1 suppresses the SASP from astrocytes induced by D-galactose via suppressing p38MAPK-dependent NF-κB activity...
February 2, 2018: Chemico-biological Interactions
Da-Peng Yun, Yu-Qi Wang, De-Long Meng, Yuan-Yuan Ji, Ju-Xiang Chen, Hong-Yan Chen, Da-Ru Lu
Glioma is the most aggressive and malignant primary brain tumor in adults. In the present study, we identified a vital oncoprotein, capping actin protein, gelsolin-like (CapG), and investigated its roles in the prognosis, proliferation and metastasis in glioma. The mRNA and protein levels of CapG were significantly increased in human glioma, and higher CapG expression was an independent prognostic factor for predicting unfavorable prognosis. The expression level of CapG was found to be associated with several common molecular features of glioblastoma (GBM; WHO grade IV glioma) in The Cancer Genome Atlas (TCGA) cohort...
January 22, 2018: Oncology Reports
Xing Song, Yingjie Shao, Tianwei Jiang, Yun Ding, Bin Xu, Xiao Zheng, Qi Wang, Xin Chen, Wendong Gu, Changping Wu, Jingting Jiang
BACKGROUND: In the present study, we aimed to investigate the role of epidermal growth factor receptor (EGFR) pathway in the up-regulation of programmed death ligand-1 (PD-L1) caused by radiotherapy (RT). MATERIALS AND METHODS: Tissue microarrays (TMA) consisting of glioma cancer specimens from 64 patients were used to examine the correlation between PD-L1 and EGFR levels. Furthermore, we performed in vitro experiments to assess the role of EGFR pathway in RT-upregulated PD-L1 expression using human glioma cell lines U87 and U251...
January 30, 2018: EBioMedicine
Yiwei Wang, Jin Zang, Dongyong Zhang, Zhenxiang Sun, Bo Qiu, Xiaojie Wang
Background: Gliomas are one of the most lethal cancers in the human central nervous system. Despite clinical treatment advancements, the prognosis of patients with glioma remains poor. KDM2B is a histone lysine demethylase, which has been observed in multiple tumors. But the concrete role of KDM2B in gliomas remains to be further illustrated. Methods: The KDM2B expression in gliomas was detected with immunohistochemistry and Western blot assay. Furthermore, knockdown of KDM2B in U87 and U251 glioma cell lines, the proliferation capacity was evaluated by cell viability assay, colon formation assay and flow cytometry in vitro...
2018: OncoTargets and Therapy
Jiafeng Ge, Weiwei Hu, Hui Zhou, Juan Yu, Chongran Sun, Weilin Chen
Ubiquitin C-terminal Hydrolase-L5 (UCH-L5/UCH37), a member of the deubiquitinases (DUBs), suppresses protein degeneration via removing ubiquitin from the distal subunit of the polyubiquitin chain. The activity of UCH-L5 is enhanced when UCH-L5 combines with proteasome 19S regulatory subunit by Rpn13/Admr1 receptor and inhibited when UCH-L5 interacts with NFRKB. But the role of UCH-L5 in gliomas remains unknown. In this study, analysis of 19 frozen and 51 paraffin-embedded clinic pathological cases showed that UCH-L5 expression in glioma tissues was lower than normal brain tissues...
December 26, 2017: Oncotarget
Hyunji Lee, Minhee Kim, Jisoo Park, Quangdon Tran, Youngeun Hong, Hyeonjeong Cho, Sungjin Park, Suntaek Hong, Derek P Brazil, Seon-Hwan Kim, Jongsun Park
TRIO and F-actin-binding protein (TrioBP), which was initially discovered as a binding partner of Trio and F‑actin, is a critical factor associated with hearing loss in humans. However, the function of TrioBP in cancer has not been investigated. In the present study, TrioBP expression was indicated to be highly elevated in U87‑MG and U343‑MG cells. Furthermore, the TrioBP mRNA expression level was markedly increased in U87‑MG and U251‑MG cells compared with that in cerebral cortex cells, as determined by deep sequencing...
January 18, 2018: Molecular Medicine Reports
Min Chen, Jiayan Wang, Yingjun Luo, Kailing Huang, Xiaoshun Shi, Yanhui Liu, Jin Li, Zhengfei Lai, Shuya Xue, Haimei Gao, Allen Chen, Dunjin Chen
BACKGROUND: Long non-coding RNAs (lncRNAs) have previously been emerged as key players in a series of biological processes. Dysregulation of lncRNA is correlated to human diseases including neurological disorders. Here, we developed a multi-step bioinformatics analysis to study the functions of a particular Down syndrome-associated gene DSCR9 including the lncRNAs. The method is named correlation-interaction-network (COIN), based on which a pipeline is implemented. Co-expression gene network analysis and biological network analysis results are presented...
January 19, 2018: Human Genomics
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