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Debajyoti Chatterjee, Bishan Dass Radotra, Narendra Kumar, Rakesh Kumar Vasishta, Sunil Kumar Gupta
Background: According to the current World Health Organization (WHO) classification of central nervous system (CNS) tumors (2016), histological diagnosis of gliomas should be supplemented by molecular information. This study was carried out to determine the frequency of isocitrate dehydrogenase 1 ( IDH 1), ATRX , and BRAF V600E mutations in different grade astrocytomas and their prognostic value. Methods: Eighty cases of astrocytoma (15 pilocytic astrocytoma, 25 diffuse astrocytoma, 15 anaplastic astrocytoma, and 25 glioblastoma) with follow-up information were analyzed using immunohistochemistry for IDH1 mutant protein, ATRX, p53, and BRAF...
2018: Surgical Neurology International
Esther Fernández-Galán, Núria Massana, Marina Parra-Robert, Susana Hidalgo, Gregori Casals, Jordi Esteve, Wladimiro Jiménez
High circulating levels of 2-hydroxyglutarate (2HG) have been reported in patients with determinate isocitrate dehydrogenase (IDH) mutated tumors. Recent studies indicate that in malignancies such as acute myeloid leukemia (AML), measurements of 2HG in serum provide useful diagnostic and prognostic information and improve patient selection and monitoring of IDH-targeted treatments. In the current study, we validated a sensitive and specific gas chromatography mass spectrometry (GC-MS) method specifically intended to quantify serum levels of 2HG in routine clinical laboratories...
February 28, 2018: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
José E Velázquez Vega, Daniel J Brat
Recent advances in molecular pathology have reshaped the practice of brain tumor diagnostics. The classification of gliomas has been restructured with the discovery of isocitrate dehydrogenase (IDH) 1/2 mutations in the vast majority of lower grade infiltrating gliomas and secondary glioblastomas (GBM), with IDH-mutant astrocytomas further characterized by TP53 and ATRX mutations. Whole-arm 1p/19q codeletion in conjunction with IDH mutations now define oligodendrogliomas, which are also enriched for CIC, FUBP1, PI3K, NOTCH1, and TERT-p mutations...
March 8, 2018: Advances in Anatomic Pathology
Leomar Y Ballester, Zain Boghani, David S Baskin, Gavin W Britz, Randall Olsen, Gregory N Fuller, Suzanne Z Powell, Matthew D Cykowski
Astrocytes with multiple micronuclei ("Creutzfeldt cells") in a brain biopsy are classically associated with demyelinating disease. However, glioblastoma may also have prominent Creutzfeldt astrocytes, along with granular mitoses. Therefore, Creutzfeldt cells may raise the diagnostic dilemma of high-grade glioma versus tumefactive demyelination. While cases of glioblastoma (GBM) with Creutzfeldt astrocytes have been reported, their clinicopathologic spectrum and genetic features are not understood...
March 6, 2018: Brain Pathology
Chang Shu, Qiong Wang, Xiaoling Yan, Jinhuan Wang
The aim of our study is to build a framework for a better understanding of high-grade glioma (HGG) prognostic-related biomarkers. Whole-genome gene expression microarray was performed to identify differently expressed genes between HGGs and low-grade diffuse gliomas. Several machine learning algorithms were used to filter prognostic-related genes. One hundred ninety-three HGG patients after surgical resection were selected for survival analysis. Immunohistochemistry were performed on these tumor samples to analyze IDH1 mutation status and protein expression of WEE1...
March 3, 2018: Journal of Molecular Neuroscience: MN
Rémi Longuespée, Annika K Wefers, Elena De Vita, Aubry K Miller, David E Reuss, Wolfgang Wick, Christel Herold-Mende, Mark Kriegsmann, Peter Schirmacher, Andreas von Deimling, Stefan Pusch
All isocitrate dehydrogenase (IDH) mutant solid neoplasms exhibit highly elevated levels of D-2-hydroxyglutarate (D-2HG). Detection of 2HG in tumor tissues currently is performed by gas or liquid chromatography-mass spectrometry (GC- or LC-MS) or biochemical detection. While these methods are highly accurate, a considerable amount of time for tissue preparation and a relatively high amount of tissue is required for testing. We here present a rapid approach to detect 2HG in brain tumor tissue based on matrix-assisted laser desorption ionization - time of flight mass spectrometry (MALDI-TOF)...
March 2, 2018: Acta Neuropathologica Communications
Stéphane Guitet, Daniel Sabatier, Olivier Brunaux, Pierre Couteron, Thomas Denis, Vincent Freycon, Sophie Gonzalez, Bruno Hérault, Gaëlle Jaouen, Jean-François Molino, Raphaël Pélissier, Cécile Richard-Hansen, Grégoire Vincent
Disturbances control rainforest dynamics, and, according to the intermediate disturbance hypothesis (IDH), disturbance regime is a key driver of local diversity. Variations in disturbance regimes and their consequences on regional diversity at broad spatiotemporal scales are still poorly understood. Using multidisciplinary large-scale inventories and LiDAR acquisitions, we developed a robust indicator of disturbance regimes based on the frequency of a few early successional and widely distributed pioneer species...
March 1, 2018: Scientific Reports
Anteneh M Feyissa, Gregory A Worrell, William O Tatum, Deependra Mahato, Benjamin H Brinkmann, Steven S Rosenfeld, Karim ReFaey, Perry S Bechtle, Alfredo Quinones-Hinojosa
OBJECTIVE: To examine the relationship between high-frequency oscillations (HFOs) and the presence of preoperative seizures, World Health Organization tumor grade, and isocitrate dehydrogenase 1 (IDH1) mutational status in gliomas. METHODS: We retrospectively studied intraoperative electrocorticography recorded in 16 patients with brain tumor (12 presenting with seizures) who underwent awake craniotomy and surgical resection between September 2016 and June 2017...
February 28, 2018: Neurology
Esther Frohnmeyer, Paulina Deptula, Tuula A Nyman, Pia K S Laine, Helena Vihinen, Lars Paulin, Petri Auvinen, Eija Jokitalo, Vieno Piironen, Pekka Varmanen, Kirsi Savijoki
This study compared the secretomes (proteins exported out of the cell) of Propionibacterium freudenreichii of different origin to identify plausible adaptation factors. Phylosecretomics indicated strain-specific variation in secretion of adhesins/invasins (SlpA, InlA), cell-wall hydrolysing (NlpC60 peptidase, transglycosylase), protective (RpfB) and moonlighting (DnaK, GroEL, GaPDH, IDH, ENO, ClpB) enzymes and/or proteins. Detailed secretome comparison suggested that one of the cereal strains (JS14) released a tip fimbrillin (FimB) in to the extracellular milieu, which was in line with the electron microscopy and genomic analyses, indicating the lack of surface-associated fimbrial-like structures, predicting a mutated type-2 fimbrial gene cluster (fimB-fimA-srtC2) and production of anchorless FimB...
February 28, 2018: Microbial Biotechnology
M Unterrrainer, I Winkelmann, B Suchorska, A Giese, V Wenter, F W Kreth, J Herms, P Bartenstein, J C Tonn, N L Albert
PURPOSE: For the clinical evaluation of O-(2-18 F-fluoroethyl)-L-tyrosine (18 F-FET) PET images, the use of standard summation images obtained 20-40 min after injection is recommended. However, early summation images obtained 5-15 min after injection have been reported to allow better differentiation between low-grade glioma (LGG) and high-grade glioma (HGG) by capturing the early18 F-FET uptake peak specific for HGG. We compared early and standard summation images with regard to delineation of the PET-derived biological tumour volume (BTV) in correlation with the molecular genetic profile according the updated 2016 WHO classification...
February 27, 2018: European Journal of Nuclear Medicine and Molecular Imaging
Christine Marosi
No abstract text is available yet for this article.
February 21, 2018: EBioMedicine
T Gambichler, I Rüddel, S Hessam, F G Bechara, E Stockfleth, L Schmitz
BACKGROUND: Koebnerized non-melanoma skin cancer following skin trauma represents a rare and obscure event. OBJECTIVES: To study molecularpathological parameters in koebnerized squamous cell carcinomas (K-SCCs) occurring after complete tumour removal. METHODS: We assessed two patients with multiple sclerosis who were on treatment with dimethylfumarate (DMF) preceded by long-term azathioprine therapy. Both patients rapidly developed several K-SCCs following histopathologically proven complete excision of cutaneous SCCs...
February 25, 2018: Journal of the European Academy of Dermatology and Venereology: JEADV
Frank M van der Sande, Marijke J Dekker, Karel M L Leunissen, Jeroen P Kooman
BACKGROUND: Intradialytic hypotension (IDH) is a common complication of haemodialysis (HD) and associated with adverse outcomes, especially when a nadir definition (systolic blood pressure <90 mm Hg) is used. The pathogenesis of IDH is directly linked to the discontinuous nature of the HD treatment, in combination with patient-related factors such as age, diabetes mellitus and cardiac failure. SUMMARY: Although the decline in blood volume due to removal of fluid by ultrafiltration is the prime mover, thermally induced reflex vasodilation compromises the haemodynamic response to hypovolemia...
January 26, 2018: Blood Purification
Vahid Reza Nafisi, Mina Shahabi
BACKGROUND AND OBJECTIVE: One of the most adverse conditions facing the hemodialysis patient is repetitive hypotension during their dialysis session. Different factors can be used to monitor patient conditions and prevent Intradialytic Hypotension (IDH) during hemodialysis. These factors include blood pressure, blood volume, and electrical Impedance factors. In this paper, pre-IDH and IDH episodes were recognized and classified by using the features of the finger photoplethysmography (PPG) signal...
April 2018: Computer Methods and Programs in Biomedicine
Yukinori Akiyama, Yuusuke Kimura, Rei Enatsu, Takeshi Mikami, Masahiko Wanibuchi, Nobuhiro Mikuni
OBJECTIVE: To retrospectively determine the safety and efficacy of combined chemotherapy with carmustine (BCNU) wafer, bevacizumab, and temozolomide plus radiotherapy in patients with newly diagnosed glioblastoma (GBM). METHODS: A total of 54 consecutive newly diagnosed GBMs were resected at our institution between 2010 and 2016. Twenty-nine patients underwent BCNU wafer implantation into the resection cavity followed by standard radiochemotherapy with with temozolomide (TMZ, Stupp regimen) plus additional bevacizumab treatment between 2013 and 2016...
February 21, 2018: World Neurosurgery
Toshihiko Iuchi, Takahiro Sugiyama, Miki Ohira, Hajime Kageyama, Sana Yokoi, Tsukasa Sakaida, Yuzo Hasegawa, Taiki Setoguchi, Makiko Itami
In this study, we retrospectively compared the prognostic value of the 2016 WHO classification with the former classification in 387 patients with glioma treated at our institution. According to the new classification, diagnoses included oligodendroglioma with isocitrate dehydrogenase (IDH) mutation and 1p/19q co-deletion (5.4%), anaplastic oligodendroglioma with IDH mutation and 1p/19q co-deletion (3.4%), diffuse astrocytoma IDH-mutated (3.9%), anaplastic astrocytoma IDH-mutated (2.8%), glioblastoma IDH-mutated (7...
February 22, 2018: Brain Tumor Pathology
Vincent King Yu Chan, Lawrence Wing Chi Chan, Daniel Hung Kay Chow
AIntradialytic hypotension (IDH) occurring during hemodialysis (HD) may cause severe complications and can be life-threatening. IDH is a common symptom in patients with end stage renal disease undergoing HD. Currently, no effective predictive models for IDH exist. This study analyzed data on variations in oxygen saturation (SaO2 ) and heart rate (HR) in 68 patients during their HD sessions by using sequence alignment and Boolean algebra. Three classifiers derived from SaO2 and HR variation data were developed as predictors for predetermining IDH occurrence within 30 minutes...
January 2018: Nephrology Nursing Journal: Journal of the American Nephrology Nurses' Association
Karim Labreche, Ben Kinnersley, Giulia Berzero, Anna Luisa Di Stefano, Amithys Rahimian, Ines Detrait, Yannick Marie, Benjamin Grenier-Boley, Khe Hoang-Xuan, Jean-Yves Delattre, Ahmed Idbaih, Richard S Houlston, Marc Sanson
Recent genome-wide association studies of glioma have led to the discovery of single nucleotide polymorphisms (SNPs) at 25 loci influencing risk. Gliomas are heterogeneous, hence to investigate the relationship between risk SNPs and glioma subtype we analysed 1659 tumours profiled for IDH mutation, TERT promoter mutation and 1p/19q co-deletion. These data allowed definition of five molecular subgroups of glioma: triple-positive (IDH mutated, 1p/19q co-deletion, TERT promoter mutated); TERT-IDH (IDH mutated, TERT promoter mutated, 1p/19q-wild-type); IDH-only (IDH mutated, 1p/19q wild-type, TERT promoter wild-type); triple-negative (IDH wild-type, 1p/19q wild-type, TERT promoter wild-type) and TERT-only (TERT promoter mutated, IDH wild-type, 1p/19q wild-type)...
February 19, 2018: Acta Neuropathologica
Dan Ye, Kun-Liang Guan, Yue Xiong
Isocitrate dehydrogenases (IDH1/2) are frequently mutated in multiple types of human cancer, resulting in neomorphic enzymes that convert α-ketoglutarate (α-KG) to 2-hydroxyglutarate (2-HG). The current view on the mechanism of IDH mutation holds that 2-HG acts as an antagonist of α-KG to competitively inhibit the activity of α-KG-dependent dioxygenases, including those involved in histone and DNA demethylation. Recent studies have implicated 2-HG in activities beyond epigenetic modification. Multiple enzymes have been discovered that lack mutations but that can nevertheless produce 2-HG promiscuously under hypoxic or acidic conditions...
February 2018: Trends in Cancer
Yabing Liu, Lejia Hu, Tengfei Ma, Jun Yang, Jianping Ding
Human NAD-dependent isocitrate dehydrogenase (NAD-IDH) catalyzes the oxidative decarboxylation of isocitrate in the citric acid cycle. In the α 2 βγ heterotetramer of NAD-IDH, the γ subunit plays the regulatory role and the β subunit the structural role. Previous biochemical data have shown that mammalian NAD-IDHs can be inhibited by NADH; however, the molecular mechanism is unclear. In this work, we show that the αβ, αγ and α 2 βγ enzymes of human NAD-IDH can be inhibited by NADH, and further determine the crystal structure of the αγ heterodimer bound with an Mg 2+ and an NADH at the active site and an NADH at the allosteric site, which resembles that of the inactive α Mg γ heterodimer...
February 16, 2018: Scientific Reports
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