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https://www.readbyqxmd.com/read/29793116/patterns-of-invasive-growth-in-malignant-gliomas-the-hippocampus-emerges-as-an-invasion-spared-brain-region
#1
Awais A Mughal, Lili Zhang, Artem Fayzullin, Andres Server, Yuping Li, Yingxi Wu, Rainer Glass, Torstein Meling, Iver A Langmoen, Trygve B Leergaard, Einar O Vik-Mo
BACKGROUND: Widespread infiltration of tumor cells into surrounding brain parenchyma is a hallmark of malignant gliomas, but little data exist on the overall invasion pattern of tumor cells throughout the brain. METHODS: We have studied the invasive phenotype of malignant gliomas in two invasive mouse models and patients. Tumor invasion patterns were characterized in a patient-derived xenograft mouse model using brain-wide histological analysis and magnetic resonance (MR) imaging...
May 21, 2018: Neoplasia: An International Journal for Oncology Research
https://www.readbyqxmd.com/read/29787924/sleep-architecture-and-epileptic-characteristics-of-drug-na%C3%A3-ve-patients-in-childhood-absence-epilepsy-spectrum-a-prospective-study
#2
Argirios Dinopoulos, Maria A Tsirouda, Anastasios Bonakis, Roser Pons, Ioanna D Pavlopoulou, Konstantinos Tsoumakas
PURPOSE: Childhood absence epilepsy (CAE) is an epileptic syndrome presenting between 2nd-10th years. The spells are elicited with hyperventilation (HV) while sleep seems to exacerbate the electrical activity. Our aim is to describe sleep architecture and its relationship with epileptic discharges (EDs) in patients with CAE, before treatment and one year later. METHODS: Twenty-eight, drug-naive children were recruited (21 girls), mean age 90.1 ± 32.6 months...
April 30, 2018: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/29785552/suppression-of-pupillary-unrest-by-general-anesthesia-and-propofol-sedation
#3
Matthias Behrends, Merlin D Larson, Andrew E Neice, Michael P Bokoch
The pupil undergoes irregular oscillations when exposed to light. These oscillations, known as pupillary unrest in ambient light, originate from oscillatory activity within the Edinger-Westphal nucleus in the midbrain. The midbrain and upper pons also contain nuclei known to be very sensitive to the effects of anesthetics that play a central role in maintaining wakefulness. We hypothesized that anesthetics may display similar effects on wakefulness and pupillary unrest. Repeat measurements of pupillary unrest using infrared pupillometry were performed in 16 patients undergoing general anesthesia and 8 patients undergoing propofol sedation...
May 21, 2018: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/29785312/a-case-of-progressive-stroke-on-posterior-circulation-with-transient-bilateral-oculomotor-palsy
#4
Chiaki Takahashi
Infarction located in the midbrain and pons presents various ophthalmic symptoms, because of the damage of the nuclei that control the movement of internal and external ocular and palpebral muscles. We experienced a case which presented with rare ocular symptoms and course. A 61-year-old man presented with left hemiparesis and dysarthria, bilateral ptosis, and bilateral impaired eyeball movement: right eyeball movement was totally impaired and left could only perform slight adduction. MRI showed fresh stroke in the right thalamus, cerebral crus, and posterior lobe and cuneate lesion on bilateral paramedian portion of the midbrain...
2018: Case Reports in Neurological Medicine
https://www.readbyqxmd.com/read/29781502/bandgap-scaling-and-negative-differential-resistance-behavior-of-zigzag-phosphorene-antidot-nanoribbons-zpanrs
#5
Santhia Carmel, Adhithan Pon, N Meenakshisundaram, R Ramesh, Arkaprava Bhattacharyya
This work examines the prospect of phosphorene antidot nanoribbons (PANRs) using the density functional based tight binding (DFTB) method. Horizontally perforated PANRs with both armchair (A) and zigzag (Z) configurations were considered for electrical simulations. Our simulation results found that the APANRs cannot be scaled down with nanoribbon width, whereas ZPANRs can be scaled easily. Bandgap scaling in terms of ribbon width, length and antidot number was thoroughly analyzed for ZPANRs. In the end, a two-terminal device was constructed and transmission analysis was performed using the non-equilibrium Green's function (NEGF) methodology...
May 21, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29781369/contralateral-extensive-cerebral-hemorrhagic-venous-infarction-caused-by-retrograde-venous-reflux-into-the-opposite-basal-vein-of-rosenthal-in-posttraumatic-carotid-cavernous-fistula-a-case-report-and-literature-review
#6
Prasert Iampreechakul, Adisak Tanpun, Punjama Lertbusayanukul, Somkiet Siriwimonmas
We describe a patient with traumatic carotid-cavernous fistula (CCF), subsequently developing contralateral extensive hemorrhagic venous infarction from retrograde venous reflux into the opposite basal vein of Rosenthal. A 54-year-old woman was involved in a motor vehicle accident and sustained severe traumatic brain injury. Two months later, she developed bilateral proptosis and audible bruit. Magnetic resonance imaging (MRI) and magnetic resonance angiography (MRA) of the brain demonstrated the right direct CCF...
January 1, 2018: Interventional Neuroradiology
https://www.readbyqxmd.com/read/29778779/ftld-als-linked-tdp-43-mutations-do-not-alter-tdp-43-s-ability-to-self-regulate-its-expression-in-drosophila
#7
Laetitia Miguel, Tracey Avequin, Marine Pons, Thierry Frébourg, Dominique Campion, Magalie Lecourtois
TDP-43 is a major disease-causing protein in amyotrophic lateral sclerosis (ALS) and Frontotemporal Lobar Degeneration (FTLD). Today, more than 50 missense mutations in the TARDBP/TDP-43 gene have been described in patients with FTLD/ALS. However, the functional consequences of FTLD/ALS-linked TDP-43 mutations are not fully elucidated. In the physiological state, TDP-43 expression is tightly regulated through an autoregulatory negative feedback loop. Maintaining normal TDP-43 protein levels is critical for proper physiological functions of the cells...
May 17, 2018: Brain Research
https://www.readbyqxmd.com/read/29778552/alterations-in-oxidative-stress-markers-in-laryngeal-carcinoma-patients
#8
Nazim Bozan, Halit Demir, Tülay Gürsoy, Hüseyin Özkan, Ufuk Düzenli, Eren Sarıkaya, Mahfuz Turan, Ahmet Faruk Kiroglu, Hakan Çankaya
BACKGROUND: Data describing how laryngeal cancer affects oxidative stress markers and antioxidants are limited. This study investigated serum antioxidant enzyme activities and oxidative stress markers before and after laryngectomies in patients with laryngeal cancer. METHODS: A total of 29 patients with laryngeal cancer and 25 healthy control subjects were enrolled. Serum malondialdehyde (MDA) levels and superoxide dismutase (SOD), glutathione peroxidase (GSHPx), catalase (CAT), paraoxonase (PON), and arylesterase activities were measured spectrophotometrically...
May 16, 2018: Journal of the Chinese Medical Association: JCMA
https://www.readbyqxmd.com/read/29777597/microdevice-based-solid-phase-polymerase-chain-reaction-for-rapid-detection-of-pathogenic-microorganisms
#9
Quang Nghia Pham, Kieu The Loan Trinh, Seung Won Jung, Nae Yoon Lee
We demonstrate the integration of DNA amplification and detection functionalities developed on a lab-on-a-chip microdevice utilizing solid-phase polymerase chain reaction (SP-PCR) for point-of-need (PON) DNA analyses. First, the polycarbonate microdevice was fabricated by thermal bonding to contain microchambers as reservoirs for performing SP-PCR. Next, the microchambers were subsequently modified with polyethyleneimine and glutaraldehyde for immobilizing amine-modified forward primers. During SP-PCR, the immobilized forward primers and freely diffusing fluorescence-labeled reverse primers cooperated to generate target amplicons, which remained covalently attached to the microchambers for the fluorescence detection...
May 19, 2018: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/29777006/in-vivo-characterization-and-quantification-of-neurofibrillary-tau-pet-radioligand-18-f-mk-6240-in-humans-from-alzheimer-s-disease-dementia-to-young-controls
#10
Tobey J Betthauser, Karly A Cody, Matthew D Zammit, Dhanabalan Murali, Alexander K Converse, Todd E Barnhart, Charles K Stone, Howard A Rowley, Sterling C Johnson, Bradley T Christian
Tau positron emission tomography (PET) imaging has potential for elucidating changes in the deposition of neuropathological tau aggregates that are occurring during the progression of Alzheimer's disease (AD). This work investigates in vivo kinetics, quantification strategies and imaging characteristics of a novel tau PET radioligand [18 F]MK-6240 in humans. Methods: Fifty-one individuals ranging from cognitively normal young controls to persons with dementia underwent T1-weighted magnetic resonance imaging (MRI), and [11 C]PiB and [18 F]MK-6240 PET imaging...
May 18, 2018: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/29777003/impact-of-reference-target-region-selection-on-amyloid-pet-standard-uptake-value-ratios-in-the-phase-1b-prime-study-of-aducanumab
#11
Ping Chiao, Barry J Bedell, Brian Avants, Alex P Zijdenbos, Marilyn Grand'Maison, Paul O'Neill, John O'Gorman, Tianle Chen, Robert Koeppe
Standardized uptake value ratios (SUVRs) are commonly used to quantify tracer uptake in amyloid beta positron emission tomography (Aβ-PET). Here, we explore the impact of target and reference region of interest (ROI) selection on SUVR effect size using interventional data from the ongoing Phase Ib PRIME study (NCT01677572) of aducanumab (BIIB037) in patients with prodromal or mild Alzheimer's disease (AD). Methods: Florbetapir PET SUVR was calculated at baseline (screening) and Weeks 26 and 54 for patients randomized to placebo and each of four aducanumab doses (1, 3, 6, and 10 mg/kg), using whole cerebellum, cerebellar grey matter, cerebellar white matter, pons, and subcortical white matter as reference regions...
May 18, 2018: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/29776591/vi-consensus-document-by-the-spanish-liver-transplantation-society
#12
Fernando Pardo, José Antonio Pons, Lluís Castells, Jordi Colmenero, Miguel Ángel Gómez, Laura Lladó, Baltasar Pérez, Martín Prieto, Javier Briceño
The goal of the Spanish Liver Transplantation Society (La Sociedad Española de Trasplante Hepático) is to promote and create consensus documents about current topics in liver transplantation with a multidisciplinary approach. To this end, on October 20, 2016, the 6th Consensus Document Meeting was held, with the participation of experts from the 24 authorized Spanish liver transplantation programs. This Edition discusses the following subjects, whose summary is offered below: 1) limits of simultaneous liver-kidney transplantation; 2) limits of elective liver re-transplantation; and 3) liver transplantation after resection and hepatocellular carcinoma with factors for a poor prognosis...
May 15, 2018: Cirugía Española
https://www.readbyqxmd.com/read/29774458/effects-of-rs591323-on-serotonin-transporter-availability-in-healthy-male-subjects
#13
Kyoungjune Pak, Hyun-Yeol Nam, Seunghyeon Shin, Keunyoung Kim, Myung Jun Lee, Eun-Joo Kim, Jae Meen Lee, Seong-Jang Kim, In Joo Kim
OBJECTIVES: We aimed to investigate the association between genetic factors of SNPs dopamine transporter (DAT) and serotonin transporter (SERT) availabilities in healthy controls. METHODS: The study population consisted of healthy controls with screening 123 I-FP-CIT single-photon emission computed tomography. Specific binding of 123 I-FP-CIT regarding DAT and SERT was calculated using a region of interest analysis. VOI template was applied to measure specific binding ratios (SBRs) of caudate nucleus, putamen, striatum, midbrain, and pons...
May 17, 2018: Annals of Nuclear Medicine
https://www.readbyqxmd.com/read/29774142/comparison-of-mri-and-123-i-fp-cit-spect-for-the-evaluation-of-msa-p-clinical-severity
#14
Miki Nishimori, Yoriko Murata, Hitomi Iwasa, Kana Miyatake, Michiko Tadokoro, Shino Kohsaki, Munenobu Nogami, Norihiko Hamada, Hitoshi Ninomiya, Yasushi Osaki, Hirokazu Furuya, Takuji Yamagami
The aim of the present study was to compare the efficacy of magnetic resonance imaging (MRI) and 123 I-labeled 2β-carbomethoxy-3β-(4-iodophenyl)-N-(3-fluoropropyl)nortropane single photon emission computed tomography (123 I-FP-CIT SPECT) for determining the clinical severity of patients with multiple system atrophy with Parkinsonism (MSA-P). MRI and 123 I-FP-CIT SPECT images from 17 patients with MSA-P as diagnosed using the Unified MSA Rating Scale part IV (UMSARS IV) score were compared. Brain MRI scans were available for all 17 patients and 123 I-FP-CIT SPECT images were available for 12 patients...
June 2018: Biomedical Reports
https://www.readbyqxmd.com/read/29772571/effect-of-air-pollution-on-exacerbations-of-bronchiectasis-in-badalona-spain-2008-2016
#15
Ignasi Garcia-Olivé, Zoran Stojanovic, Joaquim Radua, Laura Rodriguez-Pons, Carlos Martinez-Rivera, Juan Ruiz Manzano
INTRODUCTION: Air pollution has been widely associated with respiratory diseases. Nevertheless, the association between air pollution and exacerbations of bronchiectasis has been less studied. OBJECTIVE: To analyze the effect of air pollution on exacerbations of bronchiectasis. METHODS: This was a retrospective observational study conducted in Badalona. The number of daily hospital admissions and emergency room visits related to exacerbation of bronchiectasis (ICD-9 code 494...
May 17, 2018: Respiration; International Review of Thoracic Diseases
https://www.readbyqxmd.com/read/29771287/term-or-preterm-cesarean-section-delivery-does-not-lead-to-long-term-detrimental-consequences-in-mice
#16
Morgane Chiesa, Damien Guimond, Roman Tyzio, Alexandre Pons-Bennaceur, Natalia Lozovaya, Nail Burnashev, Diana C Ferrari, Yehezkel Ben-Ari
Epidemiological studies have provided contradictory data on the deleterious sequels of cesarean section (C-section) delivery and their links with developmental brain disorders such as Autism Spectrum Disorders. To gain better insight on these issues, we have now compared physiological, morphological, and behavioral parameters in vaginal, term, and preterm C-section delivered mice. We report that C-section delivery does not lead to long-term behavioral alterations though preterm C-section delivery modifies communicative behaviors in pups...
May 16, 2018: Cerebral Cortex
https://www.readbyqxmd.com/read/29766943/brain-stem-hemangioblastomas-the-seemingly-innocuous-lesion-in-a-perilous-location
#17
Jeena Joseph, Sanjay Behari, Shruti Gupta, Kamlesh Singh Bhaisora, Anish Gandhi, Arun Srivastava, Awadhesh K Jaiswal
Introduction: Hemangioblastomas [75% sporadic, 25% with Von Hippel Lindau (VHL) disease] are highly vascular, benign lesions. The surgical nuances, management, and complication avoidance in brain-stem hemangioblastomas (BHs) have been studied. Material and Methods: Over 18 years, 27(mean age: 29 years; range 15-60 years) consecutive cases of BH underwent microsurgical excision. All patients were assessed clinico-radiologically for neurological deficits and screened for VHL disease...
May 2018: Neurology India
https://www.readbyqxmd.com/read/29766933/corticospinal-tract-changes-in-acute-brainstem-ischemic-stroke-patients-a-diffusion-kurtosis-imaging-study
#18
Huiyou Chen, Liang Jiang, Hong Zhang, Ying-Dong Zhang, Wen Geng, Yuan Feng, Qian Chen, Yu-Chen Chen, Xindao Yin
Purpose: The present study aimed to investigate the corticospinal tract (CST) changes in patients with brainstem ischemic stroke by using the diffusion kurtosis imaging (DKI) approach.. Materials and Methods: Twenty-one patients with brainstem stroke and 21 group-matched healthy controls underwent brain DKI with 3.0 T magnetic resonance imaging (MRI). The DKI was obtained by using three b values of 0, 1,000, 2,000 s/mm2 with 15 diffusion directions. Regions of interest (ROIs) were placed at four levels: the pons, posterior limb of the internal capsule (PLIC), corona radiata, and precentral gyrus...
May 2018: Neurology India
https://www.readbyqxmd.com/read/29764291/a-12-year-retrospective-review-of-bullous-systemic-lupus-erythematosus-in-cutaneous-and-systemic-lupus-erythematosus-patients
#19
G J Pons-Estel, R Quintana, G S Alarcón, M Sacnún, M F Ugarte-Gil, B A Pons-Estel
No abstract text is available yet for this article.
January 1, 2018: Lupus
https://www.readbyqxmd.com/read/29761460/a-primer-for-the-rat-genome-database-rgd
#20
Stanley J F Laulederkind, G Thomas Hayman, Shur-Jen Wang, Jennifer R Smith, Victoria Petri, Matthew J Hoffman, Jeff De Pons, Marek A Tutaj, Omid Ghiasvand, Monika Tutaj, Jyothi Thota, Melinda R Dwinell, Mary Shimoyama
The laboratory rat, Rattus norvegicus, is an important model of human health and disease, and experimental findings in the rat have relevance to human physiology and disease. The Rat Genome Database (RGD, http://rgd.mcw.edu ) is a model organism database that provides access to a wide variety of curated rat data including disease associations, phenotypes, pathways, molecular functions, biological processes and cellular components for genes, quantitative trait loci, and strains. We present an overview of the database followed by specific examples that can be used to gain experience in employing RGD to explore the wealth of functional data available for the rat...
2018: Methods in Molecular Biology
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