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https://www.readbyqxmd.com/read/28926524/prognostic-significance-of-tnfr-associated-factor-1-and-2-traf1-and-traf2-in-glioblastoma
#1
Wenqing Zhang, Ying Sun, Lei Liu, Zongpeng Li
BACKGROUND TNFR-associated factor 1 (TRAF1) and TRAF2 have been demonstrated to inhibit apoptosis and promote cell survival in glioblastoma (GBM) cells with experiments in vitro. However, their clinical and prognostic significance have not been elucidated. MATERIAL AND METHODS In our study, we for the first time investigated the expression of TRAF1 and TRAF2 in 105 GBM tissues. Furthermore, we evaluated their clinical significance, including their association with clinicopathologic factors and prognostic value...
September 19, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28926163/radiomics-signature-a-potential-biomarker-for-the-prediction-of-mgmt-promoter-methylation-in-glioblastoma
#2
Yi-Bin Xi, Fan Guo, Zi-Liang Xu, Chen Li, Wei Wei, Ping Tian, Ting-Ting Liu, Lin Liu, Gang Chen, Jing Ye, Guang Cheng, Long-Biao Cui, Hong-Juan Zhang, Wei Qin, Hong Yin
BACKGROUND: In glioblastoma (GBM), promoter methylation of the DNA repair gene O-methylguanine-DNA methyltransferase (MGMT) is associated with beneficial chemotherapy. PURPOSE/HYPOTHESIS: To analyze radiomics features for utilizing the full potential of medical imaging as biomarkers of MGMT promoter methylation. STUDY TYPE: Retrospective. POPULATION/SUBJECTS: In all, 98 GBM patients with known MGMT (48 methylated and 50 unmethylated tumors)...
September 19, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28925399/dock4-promotes-loss-of-proliferation-in-glioblastoma-progenitor-cells-through-nuclear-beta-catenin-accumulation-and-subsequent-mir-302-367-cluster-expression
#3
D N Debruyne, L Turchi, F Burel-Vandenbos, M Fareh, F Almairac, V Virolle, D Figarella-Branger, N Baeza-Kallee, P Lagadec, V Kubiniek, P Paquis, D Fontaine, M-P Junier, H Chneiweiss, T Virolle
Glioblastomas (GBM) are lethal primitive brain tumours characterized by a strong intra-tumour heterogeneity. We observed in GBM tissues the coexistence of functionally divergent micro-territories either enriched in more differentiated and non-mitotic cells or in mitotic undifferentiated OLIG2 positive cells while sharing similar genomic abnormalities. Understanding the formation of such functionally divergent micro-territories in glioblastomas (GBM) is essential to comprehend GBM biogenesis, plasticity and to develop therapies...
September 18, 2017: Oncogene
https://www.readbyqxmd.com/read/28923369/rapid-identification-and-validation-of-novel-targeted-approaches-for-glioblastoma-a-combined-ex-vivo-in-vivo-pharmaco-omic-model
#4
REVIEW
Ahmad Daher, John de Groot
Tumor heterogeneity is a major factor in glioblastoma's poor response to therapy and seemingly inevitable recurrence. Only two glioblastoma drugs have received Food and Drug Administration approval since 1998, highlighting the urgent need for new therapies. Profiling "omics" analyses have helped characterize glioblastoma molecularly and have thus identified multiple molecular targets for precision medicine. These molecular targets have influenced clinical trial design; many "actionable" mutation-focused trials are underway, but because they have not yet led to therapeutic breakthroughs, new strategies for treating glioblastoma, especially those with a pharmacological functional component, remain in high demand...
September 15, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/28922853/a-rationale-for-targeting-extracellular-regulated-kinases-erk1-and-erk2-in-glioblastoma
#5
Ricarda Hannen, Maria Hauswald, Joerg Walter Bartsch
Glioblastoma (GBM) is the most common malignant primary brain tumor. It still carries a grim prognosis and new therapies are needed. This review summarizes the current status of mechanistic insights into the function of extracellular regulated kinase (ERK) and its potential as a therapeutic target for patients with GBM. Currently, some promising ERK inhibitors are in clinical trials in tumor entities other than GBM. Here, we provide a comprehensive overview on the functions of ERK1/2 in GBM and a rationale for treatment of GBM with ERK inhibitors...
October 1, 2017: Journal of Neuropathology and Experimental Neurology
https://www.readbyqxmd.com/read/28922732/physcion-8-o-%C3%AE-glucopyranosideregulates-cell-cycle-apoptosis-and-invasion-in-glioblastoma-cells-through-modulating-skp2
#6
Wen Li, Fuxia Li, Yanfang Zhu, Daqing Song
Glioblastoma multiforme (GBM) is the most common malignant glioma in the central nervous system. This study aimed to investigate the anti-tumor activity of physcion 8-O-β-glucopyranoside (PG) in GBM cells. This showed that PG could significantly block cell cycle progression, induce apoptosis, and suppress invasion in both model GBM cell lines (U87 and U251). At the molecular level, PG repressed the expression of S-phase kinase protein 2 (Skp2), which was responsible for the anti-tumor effect of PG in GBM cells...
September 14, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28922698/survival-improvements-with-adjuvant-therapy-in-patients-with-glioblastoma
#7
Dasantha Jayamanne, Helen Wheeler, Raymond Cook, Charles Teo, David Brazier, Geoff Schembri, Marina Kastelan, Linxin Guo, Michael F Back
BACKGROUND: Evaluate survival of patients diagnosed with glioblastoma multiforme (GBM) managed with adjuvant intensity modulated radiation therapy and temozolomide since the introduction of the European Organisation for Research and Treatment of Cancer and National Cancer Institute of Canada Clinical Trials Group (EORTC-NCIC) protocol. METHODS: All patients with GBM managed between May 2007 and December 2014 with EORTC-NCIC protocol were entered into a prospective database...
September 18, 2017: ANZ Journal of Surgery
https://www.readbyqxmd.com/read/28922334/common-malignant-brain-tumors-can-18f-fdg-pet-ct-aid-in-differentiation
#8
Nilendu C Purandare, Ameya Puranik, Sneha Shah, Archi Agrawal, Tejpal Gupta, Aliasgar Moiyadi, Prakash Shetty, Epari Shridhar, Rakesh Jalali, Venkatesh Rangarajan
OBJECTIVES: The objectives of this study were to evalute the metabolic characteristics of common malignant space-occupying lesions (SOL) of the brain and to determine the utility of fluorine-18-fluorodeoxyglucose (F-FDG) PET/CT in differentiating between the common types of malignant brain SOL. PATIENTS AND METHODS: All patients with brain SOL who were referred for an F-FDG PET/CT scan by a multidisciplinary team were included in this retrospective study. The metabolic characteristics of the brain lesions in the form of maximum standardized uptake value (SUVmax) along with tumor-to-background activity ratios were determined and differences were compared using nonparametric statistical tests...
September 15, 2017: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/28921565/the-impact-of-p-glycoprotein-and-breast-cancer-resistance-protein-on-the-brain-pharmacokinetics-and-pharmacodynamics-of-a-panel-of-mek-inhibitors
#9
Mark C de Gooijer, Ping Zhang, Ruud Weijer, Levi C M Buil, Jos H Beijnen, Olaf van Tellingen
Mitogen/extracellular signal-regulated kinase (MEK) inhibitors have been tested in clinical trials for treatment of intracranial neoplasms, including glioblastoma (GBM), but efficacy of these drugs has not yet been demonstrated. The blood-brain barrier (BBB) is a major impediment to adequate delivery of drugs into the brain and may thereby also limit the successful implementation of MEK inhibitors against intracranial malignancies. The BBB is equipped with a range of ATP-dependent efflux transport proteins, of which P-gp (ABCB1) and BCRP (ABCG2) are the two most dominant for drug efflux from the brain...
September 16, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/28919997/increased-infiltration-and-tolerised-antigen-specific-cd8-tem-cells-in-tumor-but-not-peripheral-blood-have-no-impact-on-survival-of-hcmv-glioblastoma-patients
#10
M Bahador, A Gras Navarro, M A Rahman, M Dominguez-Valentin, S Sarowar, E Ulvestad, G Njølstad, S A Lie, E K Kristoffersen, E Bratland, M Chekenya
Human cytomegalovirus (HCMV) antigens in glioblastoma (GBM) present opportunities for personalised immunotherapy. However, their presence in GBM tissue is still under debate, and evidence of their impact on functional immune responses and prognosis is sparse. Here, we investigated the presence of pp65 (UL83) and immediate early 1 (IE-1) HCMV antigens in a cohort of Norwegian GBM patients (n = 177), using qPCR, immunohistochemistry, and serology. HCMV status was then used to investigate whether viral antigens influenced immune cell phenotype, infiltration, activation and patient survival...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28916588/glioblastoma-stem-cell-clonal-dynamics-drive-intratumor-heterogeneity
#11
(no author information available yet)
GBM heterogeneity is primarily driven by the stochastic outcome of GBM stem cell hierarchical growth.
September 15, 2017: Cancer Discovery
https://www.readbyqxmd.com/read/28915616/tdp-43-hdac6-axis-promoted-tumor-progression-and-regulated-nutrient-deprivation-induced-autophagy-in-glioblastoma
#12
Tzu-Wei Lin, Ming-Teh Chen, Liang-Ting Lin, Pin-I Huang, Wen-Liang Lo, Yi-Ping Yang, Kai-Hsi Lu, Yi-Wei Chen, Shih-Hwa Chiou, Cheng-Wen Wu
Glioblastoma Multiforme (GBM) is a lethal primary brain tumor with poor survival lifespan and dismal outcome. Surgical resection of GBM is greatly limited due to the biological significance of brain, giving rise to tumor relapse in GBM patients. Transactive response DNA binding protein-43 (TDP-43) is a DNA/RNA-binding protein known for causing neurodegenerative diseases through post-translational modification; but little is known about its involvement in cancer development. In this study, we found that nutrient deprivation in GBM cell lines elevated TDP-43 expression by a mechanism of evasion from ubiquitin-dependent proteolytic pathway, and subsequently activated the autophagy process...
August 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28915577/vorinostat-suppresses-hypoxia-signaling-by-modulating-nuclear-translocation-of-hypoxia-inducible-factor-1-alpha
#13
Chao Zhang, Chunzhang Yang, Michael J Feldman, Herui Wang, Ying Pang, Dominic M Maggio, Dongwang Zhu, Cody L Nesvick, Pauline Dmitriev, Petra Bullova, Prashant Chittiboina, Roscoe O Brady, Karel Pacak, Zhengping Zhuang
Histone deacetylase inhibitors (HDACis) are a potent class of tumor-suppressive agents traditionally believed to exert their effects through loosening tightly-wound chromatin resulting in de-inhibition of various tumor suppressive genes. Recent literature however has shown altered intratumoral hypoxia signaling with HDACi administration not attributable to changes in chromatin structure. We sought to determine the precise mechanism of HDACi-mediated hypoxia signaling attenuation using vorinostat (SAHA), an FDA-approved class I/IIb/IV HDACi...
August 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28913783/state-of-the-art-the-evolving-role-of-rt-in-combined-modality-therapy-for-gbm
#14
EDITORIAL
Ranjit S Bindra, Eva Galanis, Minesh P Mehta
No abstract text is available yet for this article.
September 14, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/28913659/will-gay-and-bisexual-men-taking-oral-pre-exposure-prophylaxis-prep-switch-to-long-acting-injectable-prep-should-it-become-available
#15
Steven A John, Thomas H F Whitfield, H Jonathon Rendina, Jeffrey T Parsons, Christian Grov
Oral pre-exposure prophylaxis (PrEP) is highly effective at reducing HIV transmission risk and is CDC recommended for many gay, bisexual, and other men who have sex with men (GBM). We sought to investigate awareness of and preference for using long-acting injectable PrEP (LAI-PrEP) among GBM currently taking oral PrEP (n = 104), and identify their concerns. About half of GBM had heard of LAI-PrEP, and 30.8% specifically preferred LAI-PrEP. GBM with more concerns about the level of protection and drug half-life of LAI-PrEP had lower odds of preferring LAI-PrEP...
September 14, 2017: AIDS and Behavior
https://www.readbyqxmd.com/read/28912682/extracellular-vesicles-in-brain-tumors-and-neurodegenerative-diseases
#16
REVIEW
Federica Ciregia, Andrea Urbani, Giuseppe Palmisano
Extracellular vesicles (EVs) can be classified into apoptotic bodies, microvesicles (MVs), and exosomes, based on their origin or size. Exosomes are the smallest and best characterized vesicles which derived from the endosomal system. These vesicles are released from many different cell types including neuronal cells and their functions in the nervous system are investigated. They have been proposed as novel means for intercellular communication, which takes part not only to the normal neuronal physiology but also to the transmission of pathogenic proteins...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28912153/comprehensive-genomic-profiling-of-282-pediatric-low-and-high-grade-gliomas-reveals-genomic-drivers-tumor-mutational-burden-and-hypermutation-signatures
#17
Adrienne Johnson, Eric Severson, Laurie Gay, Jo-Anne Vergilio, Julia Elvin, James Suh, Sugganth Daniel, Mandy Covert, Garrett M Frampton, Sigmund Hsu, Glenn J Lesser, Kimberly Stogner-Underwood, Ryan T Mott, Sarah Z Rush, Jennifer J Stanke, Sonika Dahiya, James Sun, Prasanth Reddy, Zachary R Chalmers, Rachel Erlich, Yakov Chudnovsky, David Fabrizio, Alexa B Schrock, Siraj Ali, Vincent Miller, Philip J Stephens, Jeffrey Ross, John R Crawford, Shakti H Ramkissoon
BACKGROUND: Pediatric brain tumors are the leading cause of death for children with cancer in the U.S. Incorporating next-generation sequencing data for both pediatric low-grade (pLGGs) and high-grade gliomas (pHGGs) can inform diagnostic, prognostic, and therapeutic decision-making. MATERIALS AND METHODS: We performed comprehensive genomic profiling on 282 pediatric gliomas (157 pHGGs, 125 pLGGs), sequencing 315 cancer-related genes and calculating the tumor mutational burden (TMB; mutations per megabase [Mb])...
September 14, 2017: Oncologist
https://www.readbyqxmd.com/read/28912141/macropinocytosis-of-bevacizumab-by%C3%A2-glioblastoma-cells-in-the-perivascular-niche-affects-their-survival
#18
Gaëlle M Müller-Greven, Cathleen Carlin, Monica E Burgett, Manmeet Singh Ahluwalia, Adam Lauko, Amy S Nowacki, Cameron J Herting, Maha A Qadan, Markus Bredel, Steven A Toms, Justin D Lathia, Dolores Hambardzumyan, Jann N Sarkaria, Petra Hamerlik, Candece L Gladson
PURPOSE: Bevacizumab, a humanized monoclonal antibody to VEGF, is used routinely in the treatment of patients with recurrent glioblastoma (GBM). However, very little is known regarding the effects of bevacizumab on the cells in the perivascular space in tumors. EXPERIMENTAL DESIGN: Established orthotopic xenograft and syngeneic models of GBM were used to determine entry of monoclonal anti-VEGF-A into, and uptake by cells in, the perivascular space. Based on the results, we examined CD133+ cells derived from GBM tumors in vitro...
September 14, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28912136/tumor-resection-boosts-therapeutic-efficacy-of-encapsulated-stem-cells-expressing-a-highly-secretable-variant-of-interferon-%C3%AE-in-glioblastomas
#19
Sung Hugh Choi, Daniel W Stuckey, Sara Pignatta, Clemens Reinshagen, Jasneet K Khalsa, Nicolaas C Roozendaal, Jordi Martinez-Quintanilla, Kaoru Tamura, Erhan Keles, Khalid Shah
PURPOSE: Despite tumor resection being the frontline clinical care for glioblastoma (GBM) patients, nearly all preclinical immune therapy models intends to treat established GBM tumor. Characterizing cytoreductive surgery-induced immune-response combined with the administration of immune cytokines has the potential of offering a new treatment paradigm of immune therapy for GBMs.  Experimental design: We developed syngeneic orthotopic mouse GBM models of tumor-resection and characterized the immune response of intact and resected tumors...
September 14, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28906571/photodynamic-therapy-for-glioblastoma-a-preliminary-approach-for-practical-application-of-light-propagation-models
#20
Clément Dupont, Anne-Sophie Vignion, Serge Mordon, Nicolas Reyns, Maximilien Vermandel
PURPOSE: Photodynamic therapy (PDT) is a promising treatment modality to be added in the management of glioblastoma multiforme (GBM). Light distribution modeling is required for planning and optimizing PDT. Several models have been developed to predict the light propagation inside biological tissues. In the present study, two analytical methods of light propagation emitted from a cylindrical fiber source were evaluated: a discrete and a continuous method. METHODS: The two analytical approaches were compared according to their fluence rate results...
September 14, 2017: Lasers in Surgery and Medicine
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