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https://www.readbyqxmd.com/read/27916173/slit2-and-robo1-expression-as-biomarkers-for-assessing-prognosis-in-brain-glioma-patients
#1
Liqiang Liu, Wenhua Li, Shaomei Geng, Yanwei Fang, Zhimin Sun, Hongchao Hu, Zhaohui Liang, Zhongjie Yan
OBJECTIVES: This study was conducted to investigate the clinical significance of Slit2 and Robo1 expression in prognosis of patients with brain gliomas. METHODS: Human brain tissue samples were collected from normal glial tissues (control), low- and high-grade glioma tissues. Slit2 and Robo1 expression levels in cells were assessed by an immunohistochemistry (IHC), and population of the Slit2- and Robo1-presenting patients was examined. The Slit2 and Robo1 mRNA expression levels in three types of the brain cells was determined by RT-PCR...
December 2016: Surgical Oncology
https://www.readbyqxmd.com/read/27907162/simultaneous-11c-methionine-positron-emission-tomography-magnetic-resonance-imaging-of-suspected-primary-brain-tumors
#2
Cornelius Deuschl, Sophia Goericke, Johannes Grueneisen, Lino Morris Sawicki, Juliane Goebel, Nicolai El Hindy, Karsten Wrede, Ina Binse, Thorsten Poeppel, Harald Quick, Michael Forsting, Joerg Hense, Lale Umutlu, Marc Schlamann
INTRODUCTION: The objective of this study was to assess the diagnostic value of integrated 11C- methionine PET/MRI for suspected primary brain tumors, in comparison to MRI alone. MATERIAL AND METHODS: Forty-eight consecutive patients with suspected primary brain tumor were prospectively enrolled for an integrated 11C-methionine PET/MRI. Two neuro-radiologists separately evaluated the MRI alone and the integrated PET/MRI data sets regarding most likely diagnosis and diagnostic confidence on a 5-point scale...
2016: PloS One
https://www.readbyqxmd.com/read/27902858/reliable-estimation-of-microvascular-flow-patterns-in-patients-with-disrupted-blood-brain-barrier-using-dynamic-susceptibility-contrast-mri
#3
Mikkel Bo Hansen, Anna Tietze, Jayashree Kalpathy-Cramer, Elizabeth R Gerstner, Tracy T Batchelor, Leif Østergaard, Kim Mouridsen
PURPOSE: To present and quantify the performance of a method to compute tissue hemodynamic parameters from dynamic susceptibility contrast (DSC) MRI data in brain tissue with possible nonintact blood-brain barrier. THEORY AND MATERIALS AND METHODS: We propose a Bayesian scheme to obtain perfusion metrics, including capillary transit-time heterogeneity (CTH), from DSC-MRI data in the presence of contrast agent extravasation. Initial performance assessment is performed through simulations...
November 30, 2016: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/27899997/testin-tes-as-a-candidate-tumour-suppressor-and-prognostic-marker-in-human-astrocytoma
#4
Giedrius Steponaitis, Arunas Kazlauskas, Daina Skiriute, Indre Valiulyte, Kestutis Skauminas, Arimantas Tamasauskas, Paulina Vaitkiene
Astrocytomas are one of the most common brain tumours; however, the current methods used to characterize these tumours are inadequate. The establishment of molecular markers may identify variables required to improve tumour characterization and subtyping, and may aid to specify targets for improved treatment with essential prognostic value for patient survival. One such candidate is testin (TES), which was reported to have prognostic value for glioblastoma patients. However, the role of TES protein in gliomagenesis is currently unknown...
November 2016: Oncology Letters
https://www.readbyqxmd.com/read/27893285/recent-advances-in-subtyping-tumors-of-the-central-nervous-system-using-molecular-data
#5
Jens Schittenhelm
Primary brain tumors account for substantial morbidity and mortality. They often infiltrate the brain diffusely, continue growing, and cause adverse events, such as headaches, seizures, and neurological deficits. The classification of primary brain tumors, based for decades on histology, has been fundamentally changed by the World Health Organization in 2016 by incorporation of molecular data. Areas covered: Literature from glioblastomas, high- and low-grade astrocytic, oligodendroglial, glioneuronal and ependymal tumors from the last five years were reviewed...
November 28, 2016: Expert Review of Molecular Diagnostics
https://www.readbyqxmd.com/read/27888085/high-definition-fiber-tractography-in-evaluation-and-surgical-planning-of-thalamopeduncular-pilocytic-astrocytomas-in-pediatric-population-case-series-and-review-of-literature
#6
Emrah Celtikci, Pinar Celtikci, David Tiago Fernandes-Cabral, Murat Ucar, Juan Carlos Fernandez-Miranda, Alp Ozgun Borcek
OBJECTIVE: Thalamopeduncular tumors (TPTs) of the childhood present a challenge for neurosurgeons due to their eloquent location. Preoperative fiber tracking provides total or near-total resection, without additional neurological deficit. High-definition fiber tractography (HDFT) is an advanced white matter imaging technique derived from magnetic resonance imaging diffusion data, shown to overcome limitation of diffusion tensor imaging. We aimed to investigate alterations of corticospinal tract (CST) and medial lemniscus (ML) caused by TPTs and to demonstrate the application of HDFT in preoperative planning...
November 22, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27886157/intraoperative-seizures-and-seizures-outcome-in-patients-underwent-awake-craniotomy
#7
Yang Yuan, Zhou Peizhi, Wang Xiang, Liu Yanhui, Liang Ruofei, Jiang Shu, Mao Qing
BACKGROUND: Awake craniotomies (AC) could reduce neurological deficits compared with patients under general anesthesia, however, intraoperative seizure is a major reason causing awake surgery failure. The purpose of the study was to give a comprehensive overview the published articles focused on seizure incidence in awake craniotomy. METHODS: Bibliographic searches of the EMBASE, MEDLINE,were performed to identify articles and conference abstracts that investigated the intraoperative seizure frequency of patients underwent AC...
November 25, 2016: Journal of Neurosurgical Sciences
https://www.readbyqxmd.com/read/27881822/lowered-h3k27me3-and-dna-hypomethylation-define-poorly-prognostic-pediatric-posterior-fossa-ependymomas
#8
Jill Bayliss, Piali Mukherjee, Chao Lu, Siddhant U Jain, Chan Chung, Daniel Martinez, Benjamin Sabari, Ashley S Margol, Pooja Panwalkar, Abhijit Parolia, Melike Pekmezci, Richard C McEachin, Marcin Cieslik, Benita Tamrazi, Benjamin A Garcia, Gaspare La Rocca, Mariarita Santi, Peter W Lewis, Cynthia Hawkins, Ari Melnick, C David Allis, Craig B Thompson, Arul M Chinnaiyan, Alexander R Judkins, Sriram Venneti
Childhood posterior fossa (PF) ependymomas cause substantial morbidity and mortality. These tumors lack recurrent genetic mutations, but a subset of these ependymomas exhibits CpG island (CpGi) hypermethylation [PF group A (PFA)], implicating epigenetic alterations in their pathogenesis. Further, histological grade does not reliably predict prognosis, highlighting the importance of developing more robust prognostic markers. We discovered global H3K27me3 reduction in a subset of these tumors (PF-ve ependymomas) analogous to H3K27M mutant gliomas...
November 23, 2016: Science Translational Medicine
https://www.readbyqxmd.com/read/27880641/molecular-profiling-optimizes-the-treatment-of-low-grade-glioma
#9
EDITORIAL
David Schiff
No abstract text is available yet for this article.
December 2016: Neuro-oncology
https://www.readbyqxmd.com/read/27876012/phase-i-study-of-low-dose-metronomic-temozolomide-for-recurrent-malignant-gliomas
#10
Eric T Wong, Joshua Timmons, Amy Callahan, Lauren O'Loughlin, Bridget Giarusso, David C Alsop
BACKGROUND: The treatment goal for recurrent malignant gliomas centers on disease stabilization while minimizing therapy-related side effects. Metronomic dosing of cytotoxic chemotherapy has emerged as a promising option to achieve this objective. METHODS: This phase I study was performed using metronomic temozolomide (mTMZ) at 25 or 50 mg/m(2)/day continuously in 42-day cycles. Correlative studies were incorporated using arterial spin labeling MRI to assess tumor blood flow, analysis of matrix metalloproteinase-2 (MMP-2) and MMP-9 activities in the cerebrospinal fluid (CSF) as surrogates for tumor angiogenesis and invasion, as well as determination of CSF soluble interleukin-2 receptor alpha (sIL-2Rα) levels as a marker of immune modulation...
November 22, 2016: BMC Cancer
https://www.readbyqxmd.com/read/27871448/diagnostic-and-prognostic-value-of-serum-vitronectin-levels-in-human-glioma
#11
Mao-Hua Chen, Chuan Lu, Jun Sun, Xian-Dong Chen, Jun-Xia Dai, Jian-Yong Cai, Xiang-Lin Chen
OBJECTIVE: Vitronectin is an extracellular matrix protein, the synthesis of which by glioma cells correlates with tumor grade. The current study was designed to investigate the relationship between serum vitronectin levels and clinicopathological characteristics, diagnosis and prognosis in glioma patients. METHODS: In a prospective observatory study, a total of 98 glioma patients, 98 healthy controls, 98 other non-glioma brain tumors, and 98 other non-tumor neurological diseases were recruited...
December 15, 2016: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/27867919/white-matter-change-revealed-by-diffusion-tensor-imaging-in-gliomas
#12
Young Il Won, Chun Kee Chung, Chi Heon Kim, Chul-Kee Park, Bang-Bon Koo, Jong-Min Lee, Hee-Won Jung
BACKGROUND: Tumor-related white matter change is detected at late stages with magnetic resonance imaging (MRI), when mass effect or prominent edema is present. We analyzed if diffusion tensor imaging (DTI) white matter change earlier than conventional MRI. METHODS: Twenty-six patients with gliomas (World Health Organization grade II, 5; grade III, 12; and grade IV, 9) within 2 cm from the posterior limb of the internal capsule (IC) were studied. Fifteen normal adults were enrolled as controls...
October 2016: Brain Tumor Research and Treatment
https://www.readbyqxmd.com/read/27864226/pinpointing-cancer-stem-cells-in-oligodendroglioma
#13
(no author information available yet)
Through single-cell RNA sequencing of low-grade oligodendrogliomas, researchers have identified a cell population featuring a gene expression signature similar to those of neural stem and progenitor cells. These cancer stem cells have enriched proliferative potential and may be responsible for fueling the growth of this glioma subtype.
November 18, 2016: Cancer Discovery
https://www.readbyqxmd.com/read/27859985/leptomeningeal-dissemination-and-vertebral-bone-involvement-in-a-child-with-pilocytic-astrocytoma
#14
Metin Demirkaya, Betül Sevinir, Salih Güler, Candan Demiröz, Özgür Taskapilioglu, Selcuk Yilmazlar, Figen Palabiyik, Sahsine Tolunay
In low-grade glioma, metastasis is rarely seen. Few cases of leptomeningeal dissemination have been reported in children. Vertebral bone metastasis has not been reported so far. Herein is described the case of a pediatric patient with the diagnosis of pilocytic astrocytoma, and leptomeningeal dissemination detected at the time of diagnosis, who then received radiotherapy and chemotherapy upon development of vertebral bone metastasis during treatment.
November 13, 2016: Pediatrics International: Official Journal of the Japan Pediatric Society
https://www.readbyqxmd.com/read/27858213/prognostic-relevance-of-gemistocytic-grade-ii-astrocytoma-gemistocytic-component-and-mr-imaging-features-compared-to-non-gemistocytic-grade-ii-astrocytoma
#15
Young Jin Heo, Ji Eun Park, Ho Sung Kim, Ji Ye Lee, Soo Jeong Nam, Seung Chai Jung, Choong Gon Choi, Sang Joon Kim
OBJECTIVES: To determine if gemistocytic grade II astrocytoma (GemA) and its MR imaging characteristics are associated with a shorter time-to-progression (TTP) compared with non-gemistocytic grade II astrocytoma (non-GemA). MATERIALS AND METHODS: We enrolled 78 patients who were followed up more than 5 years (29 pathologically proven GemA and 49 non-GemA) during a 10-year period. Contrast-enhanced T1-weighted, diffusion-weighted imaging (DWI), dynamic susceptibility contrast (DSC), and MR spectroscopy (MRS) and clinical data were retrospectively reviewed...
November 17, 2016: European Radiology
https://www.readbyqxmd.com/read/27857799/a-rare-case-of-infantile-cerebellar-pilocytic-astrocytoma-and-thrombocytopenia-presenting-with-intratumoral-hemorrhage
#16
Shashank R Ramdurg, Jaybrata Maitra
Incidence of gliomas presenting with hemorrhage is around 3.7-7.2%. Low-grade gliomas account for <1% tumor with hemorrhage. Infants presenting with cerebellar pilocytic astrocytomas (PAs) and hemorrhage with thrombocytopenia have not been reported. We report an interesting case of a 9-month-old infant who presented to the emergency department in a drowsy state with recurrent vomiting. Laboratory investigations showed anemia, thrombocytopenia, and coagulopathy. Radiological evaluation showed a large PA with bleed...
July 2016: Journal of Pediatric Neurosciences
https://www.readbyqxmd.com/read/27856533/neurogenic-fever-in-a-patient-with-a-chordoid-glioma
#17
Rafael García Carretero, Marta Romero Brugera, Oscar Vazquez-Gomez, Noelia Rebollo-Aparicio
Chordoid gliomas are rare tumours. Despite being considered low-grade neoplasms, recent reviews have reported generally poor prognosis due to complications involving severe hypothalamic symptoms. We report a patient aged 30 years with chordoid glioma. What makes this case report interesting is the presence of neurogenic fever, which was already present before the final diagnosis of the brain tumour and also several months after the surgical removal. Since the patient underwent a subtotal resection of the tumour, it remains unclear whether the fever was due to hypothalamic dysfunction or remnants of the tumour...
November 17, 2016: BMJ Case Reports
https://www.readbyqxmd.com/read/27854111/the-risk-of-hypotension-and-seizures-in-patients-receiving-prophylactic-anti-epileptic-drugs-for-supratentorial-craniotomy
#18
Julius Höhne, Karl M Schebesch, Christian Ott, Alexander Brawanski, Max Lange
BACKGROUND: Perioperative seizure prophylaxis with antiepileptic drugs (AED) has been advocated in patients undergoing supratentorial craniotomy. The practice remains controversial. The reasoning presupposes that the possibility of an adverse drug reaction from the AED is lower than the probability of harm from a seizure. Even short periods of hypotension during the operation can lead to acute kidney and myocardial injury. We retrospectively evaluated cardiovascular effects and tolerability of Levetiracetam (LEV) alone, LEV and Lacosamid (LCM) as compared to Phenytoin (PHT)...
November 17, 2016: Journal of Neurosurgical Sciences
https://www.readbyqxmd.com/read/27852048/igfbp2-expression-predicts-idh-mutant-glioma-patient-survival
#19
L Eric Huang, Adam L Cohen, Howard Colman, Randy L Jensen, Daniel W Fults, William T Couldwell
Mutations of the isocitrate dehydrogenase (IDH) 1 and 2 genes occur in ~80% of lower-grade (WHO grade II and grade III) gliomas. Mutant IDH produces (R)-2-hydroxyglutarate, which induces DNA hypermethylation and presumably drives tumorigenesis. Interestingly, IDH mutations are associated with improved survival in glioma patients, but the underlying mechanism for the difference in survival remains unclear. Through comparative analyses of 286 cases of IDH-wildtype and IDH-mutant lower-grade glioma from a TCGA data set, we report that IDH-mutant gliomas have increased expression of tumor-suppressor genes (NF1, PTEN, and PIK3R1) and decreased expression of oncogenes(AKT2, ARAF, ERBB2, FGFR3, and PDGFRB) and glioma progression genes (FOXM1, IGFBP2, and WWTR1) compared with IDH-wildtype gliomas...
November 12, 2016: Oncotarget
https://www.readbyqxmd.com/read/27848207/primary-role-for-kinin-b1-and-b2-receptors-in-glioma-proliferation
#20
Natália Fontana Nicoletti, Jacques Sénécal, Vinicius Duval da Silva, Marcelo R Roxo, Nelson Pires Ferreira, Rafael Leite T de Morais, João Bosco Pesquero, Maria Martha Campos, Réjean Couture, Fernanda Bueno Morrone
This study investigated the role of kinins and their receptors in malignant brain tumors. As a first approach, GL-261 glioma cells were injected (2 × 10(5) cells in 2 μl/2 min) into the right striatum of adult C57/BL6 wild-type, kinin B1 and B2 receptor knockout (KOB1R and KOB2R) and B1 and B2 receptor double knockout mice (KOB1B2R). The animals received the selective B1R (SSR240612) and/or B2R (HOE-140) antagonists by intracerebroventricular (i.c.v.) route at 5, 10, and 15 days. The tumor size quantification, mitotic index, western blot analysis, quantitative autoradiography, immunofluorescence, and confocal microscopy were carried out in brain tumor samples, 20 days after tumor induction...
November 16, 2016: Molecular Neurobiology
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