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https://www.readbyqxmd.com/read/28742165/system-analysis-identifies-distinct-and-common-functional-networks-governed-by-transcription-factor-ascl1-in-glioma-and-small-cell-lung-cancer
#1
Sainitin Donakonda, Swati Sinha, Shrinivas Nivrutti Dighe, Manchanahalli R Satyanarayana Rao
ASCL1 is a basic Helix-Loop-Helix transcription factor (TF), which is involved in various cellular processes like neuronal development and signaling pathways. Transcriptome profiling has shown that ASCL1 overexpression plays an important role in the development of glioma and Small Cell Lung Carcinoma (SCLC), but distinct and common molecular mechanisms regulated by ASCL1 in these cancers are unknown. In order to understand how it drives the cellular functional network in these two tumors, we generated a gene expression profile in a glioma cell line (U87MG) to identify ASCL1 gene targets by an si RNA silencing approach and then compared this with a publicly available dataset of similarly silenced SCLC (NCI-H1618 cells)...
July 25, 2017: Molecular BioSystems
https://www.readbyqxmd.com/read/28741075/brain-relaxometry-after-macrocyclic-gd-based-contrast-agent
#2
Andreas Müller, Alina Jurcoane, Burkhard Mädler, Philip Ditter, Hans Schild, Elke Hattingen
PURPOSE: To assess if ratios of T1-weighted (T1w) signal intensity (SI) and quantitative T1 relaxometry (qT1) change on serial administration of macrocyclic gadobutrol. METHODS: A total of 17 glioblastoma patients were scanned at 3.0 T magnetic resonance imaging (MRI) every 6 weeks after tumor resection with standard MRI and T1 and T2 relaxometry before and after gadobutrol administration. On co-registered images T1w SI was measured and relaxation times T1 (qT1) and quantitative T2 (qT2) were quantified in several deep grey matter nuclei as ratios relative to frontal white matter and to the pons...
July 24, 2017: Clinical Neuroradiology
https://www.readbyqxmd.com/read/28740869/comparing-sequencing-assays-and-human-machine-analyses-in-actionable-genomics-for-glioblastoma
#3
Kazimierz O Wrzeszczynski, Mayu O Frank, Takahiko Koyama, Kahn Rhrissorrakrai, Nicolas Robine, Filippo Utro, Anne-Katrin Emde, Bo-Juen Chen, Kanika Arora, Minita Shah, Vladimir Vacic, Raquel Norel, Erhan Bilal, Ewa A Bergmann, Julia L Moore Vogel, Jeffrey N Bruce, Andrew B Lassman, Peter Canoll, Christian Grommes, Steve Harvey, Laxmi Parida, Vanessa V Michelini, Michael C Zody, Vaidehi Jobanputra, Ajay K Royyuru, Robert B Darnell
OBJECTIVE: To analyze a glioblastoma tumor specimen with 3 different platforms and compare potentially actionable calls from each. METHODS: Tumor DNA was analyzed by a commercial targeted panel. In addition, tumor-normal DNA was analyzed by whole-genome sequencing (WGS) and tumor RNA was analyzed by RNA sequencing (RNA-seq). The WGS and RNA-seq data were analyzed by a team of bioinformaticians and cancer oncologists, and separately by IBM Watson Genomic Analytics (WGA), an automated system for prioritizing somatic variants and identifying drugs...
August 2017: Neurology. Genetics
https://www.readbyqxmd.com/read/28740831/the-impact-of-the-tumor-microenvironment-on-the-properties-of-glioma-stem-like-cells
#4
REVIEW
Alessandra Audia, Siobhan Conroy, Rainer Glass, Krishna P L Bhat
Glioblastoma is the most common and highly malignant primary brain tumor, and patients affected with this disease exhibit a uniformly dismal prognosis. Glioma stem-like cells (GSCs) are a subset of cells within the bulk tumor that possess self-renewal and multi-lineage differentiation properties similar to somatic stem cells. These cells also are at the apex of the cellular hierarchy and cause tumor initiation and expansion after chemo-radiation. These traits make them an attractive target for therapeutic development...
2017: Frontiers in Oncology
https://www.readbyqxmd.com/read/28740449/genetic-factors-affecting-intraoperative-5-aminolevulinic-acid-induced-fluorescence-of-diffuse-gliomas
#5
Kiyotaka Saito, Toshinori Hirai, Hideo Takeshima, Yoshihito Kadota, Shinji Yamashita, Asya Ivanova, Kiyotaka Yokogami
BACKGROUND: In patients operated for malignant glioma, 5-aminolevulinic acid (5-ALA)-induced fluorescence guidance is useful. However, we occasionally experience instances of non-visible fluorescence despite a histopathological diagnosis of high-grade glioma. We sought to identify factors that influence the intraoperative visualization of gliomas by their 5-ALA-induced fluorescence. PATIENTS AND METHODS: We reviewed data from 60 patients with astrocytic or oligodendroglial tumors who underwent tumor removal under 5-ALA-induced fluorescence guidance between January 2014 and December 2015...
June 2017: Radiology and Oncology
https://www.readbyqxmd.com/read/28740446/diffusion-kurtosis-imaging-of-gliomas-grades-ii-and-iii-a-study-of-perilesional-tumor-infiltration-tumor-grades-and-subtypes-at-clinical-presentation
#6
Anna F Delgado, Markus Fahlström, Markus Nilsson, Shala G Berntsson, Maria Zetterling, Sylwia Libard, Irina Alafuzoff, Danielle van Westen, Jimmy Lätt, Anja Smits, Elna-Marie Larsson
BACKGROUND: Diffusion kurtosis imaging (DKI) allows for assessment of diffusion influenced by microcellular structures. We analyzed DKI in suspected low-grade gliomas prior to histopathological diagnosis. The aim was to investigate if diffusion parameters in the perilesional normal-appearing white matter (NAWM) differed from contralesional white matter, and to investigate differences between glioma malignancy grades II and III and glioma subtypes (astrocytomas and oligodendrogliomas)...
June 2017: Radiology and Oncology
https://www.readbyqxmd.com/read/28739720/inhibition-of-bevacizumab-induced-epithelial-mesenchymal-transition-by-batf2-overexpression-involves-the-suppression-of-wnt-%C3%AE-catenin-signaling-in-glioblastoma-cells
#7
Wenqiu Huang, Chenguang Zhang, Mengtian Cui, Jing Niu, Wei Ding
BACKGROUND/AIM: Bevacizumab (BV) has been used for the treatment of recurrent glioblastoma. However, it also induces epithelial-mesenchymal transition (EMT) in glioblastoma cells, which compromises its efficacy. BATF2 (basic leucine zipper ATF-like transcription factor 2), a multi-target transcriptional repressor, has been found to suppress cancer development partly through inhibition of Wnt/β-catenin singling. The roles of BATF2 and Wnt/β-catenin signaling in BV-induced EMT in glioblastoma cells were investigated in this study...
August 2017: Anticancer Research
https://www.readbyqxmd.com/read/28739696/differences-in-extracellular-matrix-composition-and-its-role-in-invasion-in-primary-and-secondary-intracerebral-malignancies
#8
József Virga, Csaba Dávid Szemcsák, Judit Reményi-Puskár, Judit Tóth, Tibor Hortobágyi, Éva Csősz, Gábor Zahuczky, László Szivos, Lászlo Bognár, Almos Klekner
BACKGROUND/AIM: The most common malignant primary brain tumor is glioblastoma which infiltrates the peritumoral brain, while secondary brain metastases are well demarcated malignancies. Previous research has proved the pivotal role of the changes in the extracellular matrix (ECM) in cancer cell invasion. MATERIALS AND METHODS: The mRNA expression of 40 ECM molecules was determined using qRT-PCR in 54 fresh-frozen glioblastoma and brain metastasis samples. Seventy-two samples were used to determine the levels of 20 ECM proteins...
August 2017: Anticancer Research
https://www.readbyqxmd.com/read/28739695/synergistic-effects-of-arsenite-on-radiosensitization-of-glioblastoma-cells
#9
Yasuharu Ninomiya, Dong Yu, Emiko Sekine-Suzuki, Tetsuo Nakajima
BACKGROUND/AIM: Glioblastoma is a frequent type of brain tumor and is radioresistant. Arsenite, which crosses the blood-brain barrier, shows synergistic effects with radiation in vitro and in vivo. The mechanism remains unclear. MATERIALS AND METHODS: As synergistic radiosensitization has been reported in p53-deficient cancer cells, radiosensitization was evaluated using the glioblastoma cell line, U87MG-E6, which harbors inactivated p53, in comparison with the cell line, HCT116 p53 (-/-)...
August 2017: Anticancer Research
https://www.readbyqxmd.com/read/28738862/impact-of-ischemic-preconditioning-on-surgical-treatment-of-brain-tumors-a-single-center-randomized-double-blind-controlled-trial
#10
Arthur H A Sales, Melanie Barz, Stefanie Bette, Benedikt Wiestler, Yu-Mi Ryang, Bernhard Meyer, Martin Bretschneider, Florian Ringel, Jens Gempt
BACKGROUND: Postoperative ischemia is a frequent phenomenon in patients with brain tumors and is associated with postoperative neurological deficits and impaired overall survival. Particularly in the field of cardiac and vascular surgery, the application of a brief ischemic stimulus not only in the target organ but also in remote tissues can prevent subsequent ischemic damage. We hypothesized that remote ischemic preconditioning (rIPC) in patients with brain tumors undergoing elective surgical resection reduces the incidence of postoperative ischemic tissue damage and its consequences...
July 25, 2017: BMC Medicine
https://www.readbyqxmd.com/read/28738767/synthesis-and-anticancer-evaluation-of-thiazacridine-derivatives-reveals-new-selective-molecules-to-hematopoietic-neoplastic-cells
#11
Moacyr Jesus Barreto de Melo Rêgo, Wanessa Layssa Batista de Sena, Ricardo Olímpio de Moura, Iris Trindade Tenório Jacob, Thiago Ubiratan Lins E Lins, Michelly Cristiny Pereia, Maria do Carmo Alves de Lima, Marina Rocha Galdino-Pitta, Ivan da Rocha Pitta, Maira Galdino da Rocha Pitta
Cancer has become one of the leading causes of morbidity and mortality worldwide. Limitations associated with existing agents increase the need to develop more effective anticancer drugs to improve the therapeutic arsenal available. Here, we describe the synthesis, characterization, toxicity and selectivity in vitro of three novel thiazacridine derivatives (ATZD): (Z)-5-acridin-9-ylmethylene-3-(4-methyl-benzyl)-4-thioxo-thiazolidin-2-one (LPSF/AC-99), (Z)-5-acridin-9-ylmethylene-3-(4-chloro-benzyl)-4-thioxo-thiazolidin-2-one (LPSF/AC-119) and (Z)-5-acridin-9-ylmethylene-3-(3-chloro-benzyl)-4-thioxo-thiazolidin-2-one (LPSF/AC-129)...
July 24, 2017: Combinatorial Chemistry & High Throughput Screening
https://www.readbyqxmd.com/read/28738539/lncrna-ab073614-regulates-proliferation-and-metastasis-of-colorectal-cancer-cells-via-the-pi3k-akt-signaling-pathway
#12
Yanan Wang, Haoyu Kuang, Jinfang Xue, Liya Liao, Fang Yin, Xiaojun Zhou
The expression profiles of long noncoding RNAs (lncRNAs) in colorectal cancer (CRC) have remained unclear. LncRNA AB073614 is known to be upregulated in ovarian cancer and glioma tissues, and is associated with the occurrence and progression of those cancers. In the present study, we investigated the lncRNA AB073614 gene expression patterns in CRC cell lines and tissue samples from CRC patients, and then analyzed them for possible associations with various clinicopathological characteristics. Furthermore, the roles played by lncRNA AB073614 in CRC cell proliferation, apoptosis, cell cycle progression, migration, and invasion were examined in vitro by using gene knockdown and overexpression techniques...
July 20, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28738329/distinct-involvement-of-the-sonic-hedgehog-signaling-pathway-in-gastric-adenocarcinoma-of-fundic-gland-type-and-conventional-gastric-adenocarcinoma
#13
Yuzuru Tajima, Takashi Murakami, Tsuyoshi Saito, Takafumi Hiromoto, Yoichi Akazawa, Noriko Sasahara, Hiroyuki Mitomi, Takashi Yao, Sumio Watanabe
BACKGROUND/AIMS: Gastric adenocarcinoma of fundic gland type (GAFG), which is a rare variant of gastric cancer, is reportedly associated with both Wnt/β-catenin signaling activation and guanine nucleotide binding protein, alpha stimulating complex (GNAS) mutations. This study aimed to elucidate potential roles of the Sonic hedgehog (Shh) signaling pathway in GAFG. METHODS: We performed immunostaining for β-catenin and Shh signal-associated proteins, including Patched (Ptch), Smoothened (Smo), and Glioma-associated oncogene-1 (Gli1), and the direct sequencing of GNAS/BRAF/KRAS in 27 GAFGs, and compared them with 30 conventional gastric adenocarcinomas (CGAs)...
July 22, 2017: Digestion
https://www.readbyqxmd.com/read/28738268/descriptive-epidemiology-of-primary-malignant-and-non-malignant-central-nervous-tumors-in-spain-results-from-the-girona-cancer-registry-1994-2013
#14
Rafael Fuentes-Raspall, Marta Solans, Aina Roca-Barceló, Loreto Vilardell, Montse Puigdemont, Sonia Del Barco, Raquel Comas, Adelaida García-Velasco, Aurora Astudillo, Mª Carme Carmona-Garcia, Rafael Marcos-Gragera
BACKGROUND: Systematic registration of non-malignant central nervous system (CNS) tumors is a rare practice among European cancer registries. Thus, the real burden of all CNS tumors across Europe is underestimated. The Girona Cancer Registry provides here the first data on CNS tumor incidence and survival trends in Spain for all histological types, including malignant and non-malignant tumors. METHODS: Data on all incident cases of primary CNS tumors notified to the Girona population-based cancer registry from 1994 to 2013 (n=2,131) were reviewed...
July 21, 2017: Cancer Epidemiology
https://www.readbyqxmd.com/read/28738091/the-second-window-icg-technique-demonstrates-a-broad-plateau-period-for-near-infrared-fluorescence-tumor-contrast-in-glioblastoma
#15
Ryan Zeh, Saad Sheikh, Leilei Xia, John Pierce, Andrew Newton, Jarrod Predina, Steve Cho, MacLean Nasrallah, Sunil Singhal, Jay Dorsey, John Y K Lee
INTRODUCTION: Fluorescence-guided surgery has emerged as a powerful tool to detect, localize and resect tumors in the operative setting. Our laboratory has pioneered a novel way to administer an FDA-approved near-infrared (NIR) contrast agent to help surgeons with this task. This technique, coined Second Window ICG, exploits the natural permeability of tumor vasculature and its poor clearance to deliver high doses of indocyanine green (ICG) to tumors. This technique differs substantially from established ICG video angiography techniques that visualize ICG within minutes of injection...
2017: PloS One
https://www.readbyqxmd.com/read/28737782/ferrocene-cinchona-hybrids-with-triazolyl-chalcone-linkers-act-as-pro-oxidants-and-sensitize-human-cancer-cell-lines-to-paclitaxel
#16
Ana Podolski-Renić, Szilvia Bősze, Jelena Dinić, László Kocsis, Ferenc Hudecz, Antal Csámpai, Milica Pešić
Recently, we demonstrated that ferrocene-containing compounds with a cinchona moiety displayed marked anticancer activity. Here we report on the effects of the most promising isomers encompassing quinine- (compounds 4 and 5) and quinidine-epimers (compounds 6 and 7) - synthesized using improved methods providing controlled diastereoselectivity - in three different human multidrug resistant (MDR) cancer cell lines and their sensitive counterparts (non-small cell lung carcinoma NCI-H460/R/NCI-H460, colorectal carcinoma DLD1-TxR/DLD1 and glioblastoma U87-TxR/U87)...
July 24, 2017: Metallomics: Integrated Biometal Science
https://www.readbyqxmd.com/read/28737676/high-dose-ascorbate-causes-both-genotoxic-and-metabolic-stress-in-glioma-cells
#17
Maria Leticia Castro, Georgia M Carson, Melanie J McConnell, Patries M Herst
We have previously shown that exposure to high dose ascorbate causes double stranded breaks (DSBs) and a build-up in S-phase in glioblastoma (GBM) cell lines. Here we investigated whether or not this was due to genotoxic stress as well as metabolic stress generated by exposure to high dose ascorbate, radiation, ascorbate plus radiation and H₂O₂ in established and primary GBM cell lines. Genotoxic stress was measured as phosphorylation of the variant histone protein, H2AX, 8-oxo-7,8-dihydroguanine (8OH-dG) positive cells and cells with comet tails...
July 22, 2017: Antioxidants (Basel, Switzerland)
https://www.readbyqxmd.com/read/28737579/prostate-specific-membrane-antigen-targeted-imaging-with-18f-dcfpyl-in-high-grade-gliomas
#18
Roberto Andres Salas Fragomeni, Joshua R Menke, Matthias Holdhoff, Clare Ferrigno, John Joseph Laterra, Lilja B Solnes, Mehrbod S Javadi, Zsolt Szabo, Martin G Pomper, Steven P Rowe
High-grade gliomas (World Health Organization grade III-IV) are highly lethal primary brain tumors. Imaging modalities, including MRI and FDG PET, provide a limited ability to differentiate treatment effects (such as radiation necrosis) from recurrent or residual tumor. As the first step in validating the applicability of prostate-specific membrane antigen (PSMA)-targeted imaging in high-grade gliomas, we evaluated the ability of the PSMA-targeted small molecule [F]DCFPyL (2-(3-(1carboxy-5-(6-[F]fluoro-pyridine-3-carbonyl)-amino]-pentyl)-ureido)-pentanedioic acid) to image high-grade gliomas in a series of 3 prospectively recruited patients...
July 22, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28737508/targeting-nek2-attenuates-glioblastoma-growth-and-radioresistance-by-destabilizing-histone-methyltransferase-ezh2
#19
Jia Wang, Peng Cheng, Marat S Pavlyukov, Hai Yu, Zhuo Zhang, Sung-Hak Kim, Mutsuko Minata, Ahmed Mohyeldin, Wanfu Xie, Dongquan Chen, Violaine Goidts, Brendan Frett, Wenhao Hu, Hongyu Li, Yong Jae Shin, Yeri Lee, Do-Hyun Nam, Harley I Kornblum, Maode Wang, Ichiro Nakano
Accumulating evidence suggests that glioma stem cells (GSCs) are important therapeutic targets in glioblastoma (GBM). In this study, we identified NIMA-related kinase 2 (NEK2) as a functional binding protein of enhancer of zeste homolog 2 (EZH2) that plays a critical role in the posttranslational regulation of EZH2 protein in GSCs. NEK2 was among the most differentially expressed kinase-encoding genes in GSC-containing cultures (glioma spheres), and it was required for in vitro clonogenicity, in vivo tumor propagation, and radioresistance...
July 24, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28736864/brain-tumor-segmentation-using-holistically-nested-neural-networks-in-mri-images
#20
Ying Zhuge, Andra V Krauze, Holly Ning, Jason Y Cheng, Barbara C Arora, Kevin Camphausen, Robert W Miller
PURPOSE: Gliomas are rapidly progressive, neurologically devastating, largely fatal brain tumors. Magnetic Resonance Imaging (MRI) is a widely used technique employed in the diagnosis and management of gliomas in clinical practice. MRI is also the standard imaging modality used to delineate the brain tumor target as part of treatment planning for the administration of radiation therapy. Despite more than 20 years of research and development, computational brain tumor segmentation in MRI images remains a challenging task...
July 24, 2017: Medical Physics
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