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https://www.readbyqxmd.com/read/28821904/developmentally-regulated-signaling-pathways-in-glioma-invasion
#1
REVIEW
Shwetal Mehta, Costanza Lo Cascio
Malignant gliomas are the most common, infiltrative, and lethal primary brain tumors affecting the adult population. The grim prognosis for this disease is due to a combination of the presence of highly invasive tumor cells that escape surgical resection and the presence of a population of therapy-resistant cancer stem cells found within these tumors. Several studies suggest that glioma cells have cleverly hijacked the normal developmental program of neural progenitor cells, including their transcriptional programs, to enhance gliomagenesis...
August 18, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28816956/differential-diagnosis-of-posterior-fossa-brain-tumors-multiple-discriminant-analysis-of-tl-spect-and-fdg-pet
#2
Moritaka Yamauchi, Tomohisa Okada, Tsutomu Okada, Akira Yamamoto, Yasutaka Fushimi, Yoshiki Arakawa, Susumu Miyamoto, Kaori Togashi
This study investigated the combined capability of thallium-201 (Tl)-SPECT and fluorine-18-fluoro-deoxy-glucose (FDG)-PET for differential diagnosis of posterior fossa brain tumors using multiple discriminant analysis.This retrospective study was conducted under approval of the institutional review board. In the hospital information system, 27 patients with posterior fossa intra-axial tumor between January 2009 and June 2015 were enrolled and grouped as the following 7 entities: low grade glioma (LGG) 6, anaplastic astrocytoma (AA) 2, glioblastoma (GBM) 3, medulloblastoma (MB) 3, hemangioblastoma (HB) 6, metastatic tumor (Mets) 3, and malignant lymphoma (ML) 4...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28815802/prophylactic-effects-of-ellagic-acid-and-rosmarinic-acid-on-doxorubicin-induced-neurotoxicity-in-rats
#3
Hanan A Rizk, Marwa A Masoud, Omar W Maher
Doxorubicin (DOX) is a chemotherapeutic agent widely used in human malignancies. Its long-term use cause neurobiological side effects. The aim of the present study was to investigate the prophylactic effect exerted by daily administration of ellagic acid (EA) and rosmarinic acid (RA) on DOX-induced neurotoxicity in rats. Our data showed that DOX-induced significant elevation of brain malondialdehyde, tumor necrosis factor-alpha (TNF-α), inducible nitric oxide synthase (iNOS), caspase-3, and cholinesterase associated with significant reduction in reduced glutathione, monoamines namely serotonin, dopamine, as well as norepinephrine...
August 16, 2017: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/28811384/loss-of-spdef-and-gain-of-tgfbi-activity-after-androgen-deprivation-therapy-promote-emt-and-bone-metastasis-of-prostate-cancer
#4
Wei-Yu Chen, Yuan-Chin Tsai, Hsiu-Lien Yeh, Florent Suau, Kuo-Ching Jiang, Ai-Ning Shao, Jiaoti Huang, Yen-Nien Liu
Androgen deprivation therapy (ADT) targeting the androgen receptor (AR) is a standard therapeutic regimen for treating prostate cancer. However, most tumors progress to metastatic castration-resistant prostate cancer after ADT. We identified the type 1, 2, and 4 collagen-binding protein transforming growth factor-β (TGFβ)-induced protein (TGFBI) as an important factor in the epithelial-to-mesenchymal transition (EMT) and malignant progression of prostate cancer. In prostate cancer cell lines, AR signaling stimulated the activity of the transcription factor SPDEF, which repressed the expression of TGFBI ADT, AR antagonism, or overexpression of TGFBI inhibited the activity of SPDEF and enhanced the proliferation rates of prostate cancer cells...
August 15, 2017: Science Signaling
https://www.readbyqxmd.com/read/28810555/evaluation-of-rat-c6-malignant-glioma-using-spectral-computed-tomography
#5
Jianli Liu, Junlin Zhou, Jie Li, Lingyan Zhang, Peili Zhang, Bin Liu
To investigate the use of multi-parameter spectral computed tomography (CT) for the evaluation of rat C6 glioma, 15 male Wistar rats were seeded with C6 glioma cells into the right basal ganglia and scanned 12 days later using spectral CT. Brain sections corresponding to scanned regions were immunostained for proliferation marker protein Ki67 (Ki67). Pearson's correlation coefficients between spectral CT parameters and Ki67 expression were determined. Thirteen rats survived 12 days and developed tumors. Optimal contrast-to-noise ratio achieved was 65 keV...
August 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28806983/profiling-of-metalloprotease-activities-in-cerebrospinal-fluids-of-patients-with-neoplastic-meningitis
#6
Catharina Conrad, Kristina Dorzweiler, Miles A Miller, Douglas A Lauffenburger, Herwig Strik, Jörg W Bartsch
BACKGROUND: Neoplastic invasion into leptomeninges and subarachnoid space, resulting in neoplastic meningitis (NM) is a fatal complication of advanced solid and hematological neoplasms. Identification of malignant involvement of the cerebrospinal fluid (CSF) early in the disease course has crucial prognostic and therapeutic implications, but remains challenging. As indicators of extracellular matrix (ECM) degradation and breakdown of the blood-brain-barrier, Matrix Metalloproteases (MMPs) and A Disintegrin and Metalloproteases (ADAMs) are potential analytes for cerebral pathophysiology and metastatic dissemination of tumor cells into the CSF...
August 14, 2017: Fluids and Barriers of the CNS
https://www.readbyqxmd.com/read/28806136/harnessing-olig2-function-in-tumorigenicity-and-plasticity-to-target-malignant-gliomas
#7
Jennifer Kosty, Fanghui Lu, Robert Kupp, Shwetal Mehta, Q Richard Lu
Glioblastoma (GBM) is the most prevalent and malignant brain tumor, displaying notorious resistance to conventional therapy, partially due to molecular and genetic heterogeneity. Understanding the mechanisms for gliomagenesis, tumor stem/progenitor cell propagation and phenotypic diversity is critical for devising effective and targeted therapy for this lethal disease. The basic helix-loop-helix transcription factor OLIG2, which is universally expressed in gliomas, has emerged as an important player in GBM cell reprogramming, genotoxic resistance, and tumor phenotype plasticity...
August 14, 2017: Cell Cycle
https://www.readbyqxmd.com/read/28805936/characterizing-hypoxia-in-human-glioma-a-simultaneous-multimodal-mri-and-pet-study
#8
Christine Preibisch, Kuangyu Shi, Anne Kluge, Mathias Lukas, Benedikt Wiestler, Jens Göttler, Jens Gempt, Florian Ringel, Mohamed Al Jaberi, Jürgen Schlegel, Bernhard Meyer, Claus Zimmer, Thomas Pyka, Stefan Förster
Hypoxia plays an important role for the prognosis and therapy response of cancer. Thus, hypoxia imaging would be a valuable tool for pre-therapeutic assessment of tumor malignancy. However, there is no standard validated technique for clinical application available yet. Therefore, we performed a study in 12 patients with high-grade glioma, where we directly compared the two currently most promising techniques, namely the MR-based relative oxygen extraction fraction (MR-rOEF) and the PET hypoxia marker H-1-(3-[(18) F]-fluoro-2-hydroxypropyl)-2-nitroimidazole ([(18) F]-FMISO)...
August 14, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/28805788/nrf2-keap1-pathway-promotes-cell-proliferation-and-diminishes-ferroptosis
#9
Z Fan, A-K Wirth, D Chen, C J Wruck, M Rauh, M Buchfelder, N Savaskan
Cancer cells are hallmarked by high proliferation and imbalanced redox consumption and signaling. Various oncogenic pathways such as proliferation and evading cell death converge on redox-dependent signaling processes. Nrf2 is a key regulator in these redox-dependent events and operates in cytoprotection, drug metabolism and malignant progression in cancer cells. Here, we show that patients with primary malignant brain tumors (glioblastomas, WHO °IV gliomas, GBM) have a devastating outcome and overall reduced survival when Nrf2 levels are upregulated...
August 14, 2017: Oncogenesis
https://www.readbyqxmd.com/read/28802102/pnipaam-co-jeffamine-%C3%A2-pnj-scaffolds-as-in%C3%A2-vitro-models-for-niche-enrichment-of-glioblastoma-stem-like-cells
#10
John M Heffernan, James B McNamara, Sabine Borwege, Brent L Vernon, Nader Sanai, Shwetal Mehta, Rachael W Sirianni
Glioblastoma (GBM) is the most common adult primary brain tumor, and the 5-year survival rate is less than 5%. GBM malignancy is driven in part by a population of GBM stem-like cells (GSCs) that exhibit indefinite self-renewal capacity, multipotent differentiation, expression of neural stem cell markers, and resistance to conventional treatments. GSCs are enriched in specialized niche microenvironments that regulate stem phenotypes and support GSC radioresistance. Therefore, identifying GSC-niche interactions that regulate stem phenotypes may present a unique target for disrupting the maintenance and persistence of this treatment resistant population...
May 6, 2017: Biomaterials
https://www.readbyqxmd.com/read/28801927/mediating-burden-and-stress-over-time-caregivers-of-patients-with-primary-brain-tumor
#11
Maija Reblin, Brent Small, Heather Jim, Jason Weimer, Paula Sherwood
There is a growing literature on the effects of cancer caregiving on the well-being of informal family caregivers. However, there has been little longitudinal research on caregivers of patients with the complex, rapidly-changing disease of primary malignant brain tumor (PBT). OBJECTIVE: Our objective was to model longitudinal relationships between caregiver burden, social support, and distress within caregivers of patients with PBT. METHODS: Caregiver participants were recruited from a neuro-oncology clinic...
August 11, 2017: Psycho-oncology
https://www.readbyqxmd.com/read/28800318/mir-513c-suppresses-neuroblastoma-cell-migration-invasion-and-proliferation-through-direct-targeting-glutaminase-gls
#12
Hong-Liang Xia, Yao Lv, Chun-Wei Xu, Ming-Cui Fu, Ting Zhang, Xiang-Ming Yan, Shu Dai, Qian-Wei Xiong, Yun Zhou, Jian Wang, Xu Cao
Neuroblastoma is a brain malignancy of childhood and accounts for 7-10% of childhood cancers, leading to approximately 15% of pediatric cancer deaths. MicroRNAs (miRNAs) are a family of short (about 18-25 nucleotides), noncoding and single stranded endogenous RNAs, which complementarily bind to the 3' untranslated regions of their target genes. Recently, glutamine metabolism has been recognized as an important nutrition source for tumor cells, and hence targeting glutamine metabolism could benefit to development of anti-cancer agents...
July 2, 2017: Cancer Biomarkers: Section A of Disease Markers
https://www.readbyqxmd.com/read/28797981/rhabdoid-meningioma-arising-concurrent-in-pulmonary-and-intracranial-with-a-rare-malignant-clinical-progression-case-report-and-literature-review
#13
Peng Zhao, Ning Li, Jinfeng Cao, Xiangtao Lin, Changhu Liang
BACKGROUND: Rhabdoid meningioma (RM) is an unusual variant of meningioma, classified as WHO grade III. Although its recurrence is common, extracranial metastasis is rare and usually misdiagnosed. The transfer mechanism and pathway are ambiguous; once it develops, there is a poor prognosis and no effective management. The present case is the first report on concurrent intracranial and pulmonary RM with rapid and widespread metastasis. We hope this report can be a helpful reference for clinicians and radiologists...
August 7, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28796931/modeling-phenotypes-of-malignant-gliomas
#14
REVIEW
Oltea Sampetrean, Hideyuki Saya
Malignant gliomas are primary tumors of the central nervous system characterized by diffuse infiltration into the brain and a high recurrence rate. Advances in comprehensive genomic studies have provided unprecedented insight into the genetic and molecular heterogeneity of these tumors and refined our understanding of their evolution from low to high grade. However, similar levels of phenotypic characterization are indispensable to understanding the complexity of malignant gliomas. Experimental glioma models have also achieved great progress in recent years...
August 10, 2017: Cancer Science
https://www.readbyqxmd.com/read/28794642/overexpression-of-mitochondrial-serine-hydroxyl-methyltransferase-2-is-associated-with-poor-prognosis-and-promotes-cell-proliferation-and-invasion-in-gliomas
#15
Ming Wu, Siyi Wanggou, Xuejun Li, Qing Liu, Yuanyang Xie
Mitochondrial serine hydroxyl-methyltransferase 2 (SHMT2), participating in the synthesis of mitochondrial thymidine monophosphate, has been reported to drive glioma cell survival in ischemia. However, its clinical relevance in gliomas remains unclear. In the current study, immunohistochemistry was performed to examine subcellular localization and expression levels of SHMT2 protein in glioma and non-neoplastic brain tissue specimens. Then, the associations of SHMT2 expression with various clinicopathological features and patients' prognosis were statistically evaluated...
2017: OncoTargets and Therapy
https://www.readbyqxmd.com/read/28791400/microrna%C3%A2-744-inhibits-tumor-cell-proliferation-and-invasion-of-gastric-cancer-via-targeting-brain%C3%A2-derived-neurotrophic-factor
#16
Ai-Jun Xu, Li-Na Fu, Hua-Xing Wu, Xiao-Li Yao, Rui Meng
Gastric cancer is the fourth most common malignancy and the third leading cause of cancer‑associated deaths worldwide. It has previously been demonstrated that microRNAs (miRNAs) are actively involved in the pathogenesis of gastric cancer. Therefore, miRNAs have been proposed as promising therapeutic targets in gastric cancer patients. MiR‑744 is aberrantly expressed in different types of human cancer. However, the expression pattern and biological roles of miR‑744 in gastric cancer remain unknown. The present study demonstrated that miR‑744 expression was low in gastric cancer tissues and cell lines...
August 4, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28790217/-an-elderly-patient-with-pilocytic-astrocytoma-operated-on-14-years-after-initial-detection-a-case-study
#17
Naoyuki Isobe, Takeshi Nishimoto, Takeshi Ueda
Pilocytic astrocytomas are found predominantly in the pediatric population and are extremely rare in elderly patients. We describe a case of pilocytic astrocytoma in an elderly patient who presented with the symptoms of an enlarged tumoral cyst. A 70-year-old woman was found to have an asymptomatic small solid tumor with a cystic component in the right frontal lobe at "Ningen Dock(medical checkup)of the Brain". She was hospitalized and underwent further examinations including cerebral angiography. At that time, she was opposed to undergoing an operation for tumor removal owing to lack of symptoms...
August 2017: No Shinkei Geka. Neurological Surgery
https://www.readbyqxmd.com/read/28783147/marrow-ablative-chemotherapy-followed-by-tandem-autologous-hematopoietic-cell-transplantation-in-pediatric-patients-with-malignant-brain-tumors
#18
J A Guerra, G Dhall, A Marachelian, E Castillo, J Malvar, K Wong, R Sposto, J L Finlay
To improve survival in young children with malignant brain tumors, irradiation-avoiding or -minimizing marrow-ablative chemotherapy (HDCx) with autologous hematopoietic cell transplantation (AuHCT) has been investigated. We evaluated the outcome of 44 children with malignant brain tumors treated with HDCx and tandem AuHCT at Children's Hospital Los Angeles between June 1999 and July 2012. Forty-four children with malignant brain tumors were studied. Twenty-one had medulloblastoma/primitive neuro-ectodermal tumor, eight atypical teratoid/rhabdoid tumor (ATRT), five high-grade glioma, four malignant germ cell tumor, three ependymoma and three choroid plexus carcinoma...
August 7, 2017: Bone Marrow Transplantation
https://www.readbyqxmd.com/read/28781923/discrepancy-between-radiological-and-histological-findings-in-ganglioglioma-of-the-optic-chasm-case-report
#19
Yoshito Sugita, Masahiro Sawada, Toshihiro Munemitsu, Tatsuya Higashi, Masato Hojo
BACKGROUND: Gangliogliomas involving the optic nerve or chiasm are extremely rare tumors, which can be confused radiologically with other neoplasms. α-[N-methyl-(11)C]-methylaminoisobutyric acid ((11)C-MeAIB) is a new artificial amino acid positron emission tomography (PET) tracer, which is metabolically more stable in vivo and may be more specific for tumors than (11)C-methionine. However, the utility of (11)C-MeAIB PET in the diagnosis of brain tumors has not yet been reported. CASE DESCRIPTION: A 26-year-old man presented with visual field defects and headache, and magnetic resonance imaging demonstrated a suprasellar mass involving the optic chiasm...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28781128/six-cases-of-sporadic-schwannomatosis-topographic-distribution-and-outcomes-of-peripheral-nerve-tumors
#20
G Chick, J Victor, N Hollevoet
The diagnosis of schwannomatosis is often overestimated and is based on the existence of multiple peripheral nerve tumors composed exclusively of schwannomas, in the absence of clinical signs of neurofibromatosis type 2 (NF2). Sporadic forms are much more frequent than familial forms. The objective of this study was to describe the distribution of peripheral nerve tumors and investigate the outcomes of schwannomas in the context of sporadic schwannomatosis. We conducted a retrospective study of patients who fulfilled clinical diagnostic criteria for sporadic schwannomatosis...
August 3, 2017: Hand Surgery and Rehabilitation
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