Environmental risk factors of primary brain tumors: A review.

Environmental risk factors of primary brain tumors: A review. Rev Neurol (Paris). 2019 Sep 13;: Authors: Vienne-Jumeau A, Tafani C, Ricard D Abstract Adult primary tumors of the central nervous system are rare, but the incidence is increased in some European countries. Several environmental exposures have been investigated as potential risk factors, but for most, scientific evidence is still lacking. Here we review studies of environmental factors potentially involved in the carcinogenesis of brain tumors: the potential association between primary central nervous system tumors and ionizing radiation, some toxic agents (N-nitroso compounds, pesticides), air pollution, and radiofrequency electromagnetic waves. Brain-ionizing irradiation, especially during childhood, constitutes a well-established risk factor for brain tumors. Exposure to environmental toxins has been poorly explored and data give inconsistent clues about N-nitroso compounds or pesticides as risk factors of brain tumors even for prenatal exposure. For out-door pollution and risk of brain tumour, results of large prospective studies are contradictory. The effect of mobile phones on the risk of developing brain tumors has not been established for glioma and meningioma in adults, but the link with acoustic neurinoma is becoming robust. The effect of mobile phones has still not been explored in children. PMID: 31526552 [PubMed - as supplied by publisher]
Source: Revue Neurologique - Category: Neurology Tags: Rev Neurol (Paris) Source Type: research

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Authors: Suo F, Zhong B, Lu F, Dong Z Abstract Glioma is the most aggressive brain tumor and is associated with a high mortality rate. The aim of the present study was to explore the association between matrix metalloproteinase 2 (MMP-2) and ephrin type-A receptor 2 (EphA2) expression in glioma cells, and to investigate the contribution of magnetic resonance imaging (MRI) in glioma classification. A total of 43 patients with pathologically confirmed glioma were divided into two groups as follows: Low-grade (grades I and II; n=21) and high-grade (grades IV and IV; n=22). Subsequently, immunohistochemistry staining w...
Source: Oncology Letters - Category: Cancer & Oncology Tags: Oncol Lett Source Type: research
A radiation therapy (RT) treatment that combines radiation with chemotherapy...Read more on AuntMinnie.comRelated Reading: Intelerad to launch enterprise software at RANZCR 2019 RANZCR issues final version of ethical AI guidelines RANZCR praises government pledge to support MRI access RANZCR proposes ethical guidelines for AI Virtual reality may help plan, guide glioma resection
Source: AuntMinnie.com Headlines - Category: Radiology Source Type: news
Purpose Gliomas constitute the most frequent primary brain tumors. Glioblastoma, the most common and malignant glioma in adults, has dismal prognosis with any current therapy. On the other hand, low-grade gliomas, the second most common type of gliomas, are potentially curative with appropriate treatment. Methods We conducted a meta-analysis to assess the performance of PET tracers with the best available evidence, namely, fluorodeoxyglucose (FDG), 11C-methionine (MET), and 18F-fluoroethyltyrosine (FET), in differentiating low- from high-grade gliomas. Results Twenty-three studies with a total of 994 participants w...
Source: Clinical Nuclear Medicine - Category: Nuclear Medicine Tags: Original Articles Source Type: research
A radiation therapy (RT) treatment that combines radiation with chemotherapy...Read more on AuntMinnie.comRelated Reading: Intelerad to launch enterprise software at RANZCR 2019 RANZCR issues final version of ethical AI guidelines RANZCR praises government pledge to support MRI access RANZCR proposes ethical guidelines for AI Virtual reality may help plan, guide glioma resection
Source: AuntMinnie.com Headlines - Category: Radiology Source Type: news
Publication date: Available online 16 October 2019Source: Journal of Photochemistry and Photobiology B: BiologyAuthor(s): Deborah Piffaretti, Floriana Burgio, Marcus Thelen, Alain Kaelin-Lang, Paolo Paganetti, Michael Reinert, Maria Luisa D'AngeloAbstractFluorescence image guided surgical resection (FIGR) of high grade gliomas (HGGs) takes advantage of the accumulation of the tracer protoporphyrin IX (PpIX) in glioma cells following administration of 5-aminolevulinic acid (5-ALA). Occasionally, PpIX fluorescence intensity may be insufficient, thus compromising the efficacy and precision of the surgical intervention. The ca...
Source: Journal of Photochemistry and Photobiology B: Biology - Category: Speech-Language Pathology Source Type: research
Glioblastoma (GB) represents the most frequent primary malignancy of the brain in adults, accounting for more than half of all gliomas [1]. Survival times are still narrow and range between 1 and 3  years [2–6]. Even patients with favorable risk factors, such as young age, high Karnofsky performance status (KPS) and hypermethylation of the O6-methylguanine-DNA-methyltransferase (MGMT) promoter suffer from tumor recurrence, usually occurring 14–17 months after therapy [2,6].
Source: Radiotherapy and Oncology - Category: Radiology Authors: Tags: Original Article Source Type: research
Conclusions: In this study, a risk signature with five pseudogenes was constructed and shown to accurately predict 1-, 3-, and 5-year survival for glioma patient. The risk signature may serve as a potential target against glioma.
Source: Frontiers in Oncology - Category: Cancer & Oncology Source Type: research
Glioma is the most malignant brain tumors in the world, the function and molecular mechanism of microRNA-199a (miR-199a) in glioma is not fully understood. Our research aims to investigate miR-199a/K-RAS axis in regulation of glioma tumor growth and chemoresistance. The function of miR-199a in glioma was investigated through in vitro and in vivo assays. We found that miR-199a in tumor tissues of glioma patients was significantly downregulated in this study. Kinase suppressor of ras 1 (K-RAS), was indicated as a direct target of miR-199a, as well as expression levels of K-RAS were inversely correlated with expression levels...
Source: Frontiers in Oncology - Category: Cancer & Oncology Source Type: research
, Cole KA, Children’s Brain Tumor Tissue Consortium PMID: 31613963 [PubMed - as supplied by publisher]
Source: Ann Oncol - Category: Cancer & Oncology Authors: Tags: Neuro Oncol Source Type: research
CONCLUSION: A multivariate prediction model created using blood flow, vascular permeability, and glycometabolism parameters can predict the extent of hypoxia in FMISO-positive areas in patients with brain tumors. PMID: 31611541 [PubMed - as supplied by publisher]
Source: Magnetic Resonance in Medical Sciences : MRMS - Category: Radiology Authors: Tags: Magn Reson Med Sci Source Type: research
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