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https://www.readbyqxmd.com/read/29353034/impact-of-targeted-scanning-protocols-on-perinatal-outcomes-in-pregnancies-at-risk-of-placenta-accreta-spectrum-or-vasa-previa
#1
Yaakov Melcer, Eric Jauniaux, Shlomit Maymon, Anna Tsviban, Marina Pekar-Zlotin, Moshe Betser, Ron Maymon
BACKGROUND: Placenta accreta spectrum (PAS) and vasa previa (VP) are congenital disorders of placentation associated with high morbidity and mortality for both mothers and newborns when undiagnosed before delivery. Prenatal diagnosis of these conditions is essential to allow multidisciplinary management and thus improve perinatal outcomes. OBJECTIVES: To compare perinatal outcome in women with PAS or VP before and after implementation of targeted scanning protocols...
January 15, 2018: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/29352698/gastric-varices-bleed-at-lower-portosystemic-pressure-gradients-than-esophageal-varices
#2
Joseph D Morrison, Nasya Mendoza-Elias, Andrew J Lipnik, R Peter Lokken, James T Bui, Charles E Ray, Ron C Gaba
PURPOSE: To quantify and compare portosystemic pressure gradients (PSGs) between bleeding esophageal varices (EV) and gastric varices (GV). MATERIALS AND METHODS: In a single-center, retrospective study, 149 patients with variceal bleeding (90 men, 59 women, mean age 52 y) with EV (n = 69; 46%) or GV (n = 80; 54%) were selected from 320 consecutive patients who underwent successful transjugular intrahepatic portosystemic shunt (TIPS) creation from 1998 to 2016...
January 15, 2018: Journal of Vascular and Interventional Radiology: JVIR
https://www.readbyqxmd.com/read/29352107/mycolyltransferase-from-mycobacterium-tuberculosis-in-covalent-complex-with-tetrahydrolipstatin-provides-insights-into-antigen-85-catalysis
#3
Christopher M Goins, Steven Dajnowicz, Micholas D Smith, Jerry M Parks, Donald R Ronning
Mycobacterium tuberculosis Antigen 85 enzymes (Ag85s) catalyze the transfer of mycolic acid (MA) from trehalose monomycolate to produce the mycolyl arabinogalactan (mAG) or trehalose dimycolate (TDM). These lipids define the protective mycomembrane of Mycobacteria. The current model of substrate binding within the active sites of Ag85s for the production of TDM is not sterically and geometrically feasible; additionally, this model does not account for the production of mAG. Furthermore, this model does not address how Ag85s limit the hydrolysis of the acyl-enzyme intermediate while catalyzing acyl transfer...
January 19, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29350541/using-cell-phone-technology-to-investigate-a-deliberate-bacillus-anthracis-release-scenario
#4
Arik Eisenkraft, Amichay Afriat, Yechiel Hubary, Ron Lev, Hayim Shaul, Ran D Balicer
Unusual biological events and outbreaks require rapid epidemiologic investigation and contact tracing procedures, allowing optimal handling of resources. Currently, these are resource intensive, time consuming, and extremely complex, requiring large teams of trained and prepared personnel. The goal of this study was to determine whether a technological alternative to the classic systems, based on the use of mobile phones and a unique algorithm, could perform a complete epidemiologic investigation in a setting of a bioterrorism scenario...
January 19, 2018: Health Security
https://www.readbyqxmd.com/read/29350197/a-three-dimensional-correction-method-for-predicting-the-readings-of-a-pinpoint-chamber-on-the-cyberknife-sup-%C3%A2-sup-m6%C3%A2-machine
#5
Yongqian Zhang, Edward Brandner, Cihat Ozhasoglu, Ron Lalonde, Dwight E Heron, M Saiful Huq
The use of small fields in radiation therapy techniques has increased substantially in particular in stereotactic radiosurgery (SRS) and stereotactic body radiation therapy (SBRT). However, as field size reduces further still, the response of the detector changes more rapidly with field size, and the effects of measurement uncertainties become increasingly significant. This work presents a novel 3D dose volume-to-point correction method to predict the readings of a 0.015cc PinPoint chamber (PTW 31014) for both small static-fields and composite-field dosimetry formed by fixed cones on the CyberKnife® M6™ machine...
January 19, 2018: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29348925/volume-estimates-in-chronic-hemodialysis-patients-by-the-watson-equation-and-bioimpedance-spectroscopy-and-the-impact-on-the-kt-vurea-calculation
#6
Nazanin Noori, Ron Wald, Arti Sharma Parpia, Marc B Goldstein
Background: Accurate assessment of total body water (TBW) is essential for the evaluation of dialysis adequacy (Kt/Vurea). The Watson formula, which is recommended for the calculation of TBW, was derived in healthy volunteers thereby leading to potentially inaccurate TBW estimates in maintenance hemodialysis recipients. Bioimpedance spectroscopy (BIS) may be a robust alternative for the measurement of TBW in hemodialysis recipients. Objectives: The primary objective of this study was to evaluate the accuracy of Watson formula-derived TBW estimates as compared with TBW measured with BIS...
2018: Canadian Journal of Kidney Health and Disease
https://www.readbyqxmd.com/read/29348821/glycan-microarray-reveal-induced-iggs-repertoire-shift-against-a-dietary-carbohydrate-in-response-to-rabbit-anti-human-thymocyte-therapy
#7
Ron Amon, Shani Leviatan Ben-Arye, Limor Engler, Hai Yu, Noha Lim, Ludmilla Le Berre, Kristina M Harris, Mario R Ehlers, Stephen E Gitelman, Xi Chen, Jean-Paul Soulillou, Vered Padler-Karavani
Humans have circulating antibodies against diverse glycans containing N-glycolylneuraminic acid (Neu5Gc) due to function-loss mutation of the CMAH gene. This xenogenic non-human carbohydrate is abundant in red meat, xenografts and biotherapeutics. Low levels of diet-derived Neu5Gc is also present on normal human endothelial cells, and together with anti-Neu5Gc antibodies could potentially mediate "xenosialitis" chronic-inflammation. Rabbit anti-human thymocyte globulin (ATG) is a drug containing polyclonal IgG glycoproteins commonly used as an immunosuppressant in human transplantation and autoimmune diseases...
December 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/29348301/predicting-the-presence-of-macrovascular-causes-in-non-traumatic-intracerebral-haemorrhage-the-diagram-prediction-score
#8
Nina A Hilkens, Charlotte J J van Asch, David J Werring, Duncan Wilson, Gabriël J E Rinkel, Ale Algra, Birgitta K Velthuis, Gérard A P de Kort, Theo D Witkamp, Koen M van Nieuwenhuizen, Frank-Erik de Leeuw, Wouter J Schonewille, Paul L M de Kort, Diederik W J Dippel, Theodora W M Raaymakers, Jeannette Hofmeijer, Marieke J H Wermer, Henk Kerkhoff, Korné Jellema, Irene M Bronner, Michel J M Remmers, Henri Paul Bienfait, Ron J G M Witjes, H Rolf Jäger, Jacoba P Greving, Catharina J M Klijn
OBJECTIVE: A substantial part of non-traumatic intracerebral haemorrhages (ICH) arises from a macrovascular cause, but there is little guidance on selection of patients for additional diagnostic work-up. We aimed to develop and externally validate a model for predicting the probability of a macrovascular cause in patients with non-traumatic ICH. METHODS: The DIagnostic AngioGRAphy to find vascular Malformations (DIAGRAM) study (n=298; 69 macrovascular cause; 23%) is a prospective, multicentre study assessing yield and accuracy of CT angiography (CTA), MRI/ magnetic resonance angiography (MRA) and intra-arterial catheter angiography in diagnosing macrovascular causes in patients with non-traumatic ICH...
January 18, 2018: Journal of Neurology, Neurosurgery, and Psychiatry
https://www.readbyqxmd.com/read/29346583/datamed-an-open-source-discovery-index-for-finding-biomedical-datasets
#9
Xiaoling Chen, Anupama E Gururaj, Burak Ozyurt, Ruiling Liu, Ergin Soysal, Trevor Cohen, Firat Tiryaki, Yueling Li, Nansu Zong, Min Jiang, Deevakar Rogith, Mandana Salimi, Hyeon-Eui Kim, Philippe Rocca-Serra, Alejandra Gonzalez-Beltran, Claudiu Farcas, Todd Johnson, Ron Margolis, George Alter, Susanna-Assunta Sansone, Ian M Fore, Lucila Ohno-Machado, Jeffrey S Grethe, Hua Xu
Objective: Finding relevant datasets is important for promoting data reuse in the biomedical domain, but it is challenging given the volume and complexity of biomedical data. Here we describe the development of an open source biomedical data discovery system called DataMed, with the goal of promoting the building of additional data indexes in the biomedical domain. Materials and Methods: DataMed, which can efficiently index and search diverse types of biomedical datasets across repositories, is developed through the National Institutes of Health-funded biomedical and healthCAre Data Discovery Index Ecosystem (bioCADDIE) consortium...
January 13, 2018: Journal of the American Medical Informatics Association: JAMIA
https://www.readbyqxmd.com/read/29343530/peripapillary-vascular-changes-in-radiation-optic-neuropathy-an-optical-coherence-tomography-angiography-grading
#10
Raffaele Parrozzani, Luisa Frizziero, Davide Londei, Sara Trainiti, Rocco Luigi Modugno, Francesca Leonardi, Serena Pulze, Giacomo Miglionico, Elisabetta Pilotto, Edoardo Midena
AIMS: To investigate peripapillary vascular changes secondary to radiation optic neuropathy (RON) using optical coherence tomography angiography (OCT-A) and to propose a clinical grading of RON based on OCT-A findings. METHODS: Thirty-four patients affected by RON were consecutively included. Each patient underwent best corrected visual acuity measurement (ETDRS score) and OCT-A (Nidek RS-3000 Advance device, Nidek, Gamagori, Japan). The radial peripapillary capillary plexus (RPCP) and the entire peripapillary capillary bed (EPCB) were analysed...
January 17, 2018: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/29343526/mutations-in-cyb561-causing-a-novel-orthostatic-hypotension-syndrome
#11
Maarten P van den Berg, Rowida Almomani, Italo Biaggioni, Martijn van Faassen, Pim van der Harst, Herman H Silljé, Irene Mateo Leach, Marc Hemmelder, Gerjan Navis, Gert-Jan Luijckx, Arjan P de Brouwer, Hanka Venselaar, Marcel M Verbeek, Paul A van der Zwaag, Jan D Jongbloed, J P van Tintelen, Ron A Wevers, Ido P Kema
Rationale: Orthostatic hypotension is a common clinical problem, but the underlying mechanisms have not been fully delineated. Objective: We describe two families, with four patients in total, suffering from severe life-threatening orthostatic hypotension due to a novel cause. Methods and Results: As in dopamine β-hydroxylase deficiency (DβH), concentrations of norepinephrine and epinephrine in the patients were very low. Plasma DβH activity, however, was normal and the DBH gene had no mutations. Molecular genetic analysis was performed to determine the underlying genetic cause...
January 17, 2018: Circulation Research
https://www.readbyqxmd.com/read/29341329/violence-and-child-mental-health-in-brazil-the-itabora%C3%A3-youth-study-methods-and-findings
#12
I A Bordin, C S Duarte, W S Ribeiro, C S Paula, E S F Coutinho, A Sourander, J A Rønning
OBJECTIVES: To demonstrate a study design that could be useful in low-resource and violent urban settings and to estimate the prevalence of child violence exposure (at home, community, and school) and child mental health problems in a low-income medium-size city. METHODS: The Itaboraí Youth Study is a Norway-Brazil collaborative longitudinal study conducted in Itaboraí city (n = 1409, 6-15 year olds). A 3-stage probabilistic sampling plan (random selection of census units, eligible households, and target child) generated sampling weights that were used to obtain estimates of population prevalence rates...
January 17, 2018: International Journal of Methods in Psychiatric Research
https://www.readbyqxmd.com/read/29340328/nephrin-loss-can-be-used-to-predict-remission-and-long-term-renal-outcome-in%C3%A2-patients-with-minimal-change-disease
#13
Nina A van de Lest, Malu Zandbergen, Daphne H T IJpelaar, Ron Wolterbeek, Jan A Bruijn, Ingeborg M Bajema, Marion Scharpfenecker
Introduction: Minimal change disease is a common cause of nephrotic syndrome. In general, patients with minimal change disease respond to corticosteroids and have excellent long-term renal survival. However, some patients have less favorable outcome. These patients are often thought to have progressed to focal segmental glomerulosclerosis. We previously reported that a segmental loss of podocyte markers is present before the development of focal segmental glomerulosclerosis in a rat model...
January 2018: KI Reports
https://www.readbyqxmd.com/read/29339965/bilateral-radiation-optic-neuropathy-following-concurrent-chemotherapy-and-radiation-in-glioblastoma
#14
Jigisha P Thakkar, John T Slevin, Charles D Smith, Padmaja Sudhakar, William St Clair, John L Villano
Radiation optic neuropathy (RON) is an iatrogenic complication that causes severe, irreversible vision loss within months to years following radiation to lesions close to the visual pathway. The authors describe a case of RON in glioblastoma after radio-sensitisation with temozolomide with sequential involvement of both optic nerves. This case provides a timeline for clinical and imaging findings with RON and specifically resolution of nerve enhancement. The authors also highlight the potential of an increase in incidence of RON in glioblastoma with advances in survival seen with greater use of second-line chemotherapy and even re-radiation...
October 2017: Neuro-ophthalmology
https://www.readbyqxmd.com/read/29339571/infrared-photoconductivity-and-photovoltaic-response-from-nanoscale-domains-of-pbs-alloyed-with-thorium-and-oxygen
#15
Neta Arad-Vosk, Rotem Beach, Amichai Ron, Tzvi Tzvi Templeman, Yuval Golan, Gabby Sarusi, Amir Sa'ar
Thin films of lead sulfide alloyed with thorium and oxygen were deposited on GaAs substrates and processed to produce a photo-diode structure. Structural, optical and electrical characterizations indicate the presence of small nanoscale domains that are characterized by dense packaging, high quality interfaces and a blue-shift of the energy bandgap toward the short wavelength infrared range of the spectrum. Photocurrent spectroscopy revealed a considerable photo-conductivity that is correlated with excitation of carriers in the nanoscale domains of lead sulfide alloyed with thorium and oxygen...
January 17, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29339299/is-there-a-difference-in-the-outcome-of-mid-urethral-sling-operations-performed-by-urogynecologists-as-compared-to-supervised-residents
#16
Osnat Elyashiv, Noa Mevorach Zussman, Masha Ben-Zvi, Jacob Bar, Ron Sagiv, Alexander Condrea, Shimon Ginath
STUDY OBJECTIVE: To compare the operative results of midurethral sling (MUS) surgeries for stress urinary incontinence (SUI) performed by residents under the guidance of an attending specialist in urogynecology, to those done by attendings. DESIGN: Retrospective chart review DESIGN CLASSIFICATION: Canadian Task Force classification II-2 SETTING: University hospital PATIENTS: A retrospective analysis of all MUS's performed between January 2009 to December 2013, in a single public tertiary medical center, was carried out...
January 12, 2018: Journal of Minimally Invasive Gynecology
https://www.readbyqxmd.com/read/29338870/peptide-retention-prediction-using-hydrophilic-interaction-liquid-chromatography-coupled-to-mass-spectrometry
#17
Majors J Badgett, Barry Boyes, Ron Orlando
A model that predicts retention for peptides using a HALO® penta-HILIC column and gradient elution was created. Coefficients for each amino acid were derived using linear regression analysis and these coefficients can be summed to predict the retention of peptides. This model has a high correlation between experimental and predicted retention times (0.946), which is on par with previous RP and HILIC models. External validation of the model was performed using a set of H. pylori samples on the same LC-MS system used to create the model, and the deviation from actual to predicted times was low...
January 11, 2018: Journal of Chromatography. A
https://www.readbyqxmd.com/read/29337847/hiv-care-continuum-disparities-among-bisexual-black-men-and-the-mediating-effect-of-psychosocial-co-morbidities
#18
M Reuel Friedman, Jordan M Sang, Leigh A Bukowski, Derrick D Matthews, Lisa A Eaton, H Fisher Raymond, Ron Stall
INTRODUCTION: Differences across the HIV care continuum between men who have sex with men and women (MSMW) and men who have sex with men only (MSMO) are emerging in recent literature but have not been comprehensively documented among Black MSM. Although MSMW have lower HIV prevalence than MSMO, they are more likely to be HIV-positive unaware and be virally unsuppressed. Explanatory factors for these differences have not previously been assessed. METHODS: Between 2014-2016, we surveyed sexually active Black MSM ≥18 years old at Black Gay Pride events in six U...
January 15, 2018: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/29337379/interleukin-17a-and-vascular-remodeling-in-severe-asthma-lack-of-evidence-for-a-direct-role
#19
Alice Panariti, Carolyn J Baglole, Veronica Sanchez, David H Eidelman, Sabah Hussain, Ron Olivenstein, James G Martin, Qutayba Hamid
BACKGROUND: Bronchial vascular remodeling may contribute to the severity of airway narrowing through mucosal congestion. Interleukin (IL)-17A is associated with the most severe asthmatic phenotype but whether it might contribute to vascular remodeling is uncertain. OBJECTIVE: To assess vascular remodeling in severe asthma and whether IL-17A directly or indirectly may cause endothelial cell activation and angiogenesis. METHODS: Bronchial vascularization was quantified in asthmatic subjects, COPD and healthy subjects together with the number of IL-17A+ cells as well as the concentration of angiogenic factors in the sputum...
January 16, 2018: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29337310/oatp1b2-deficiency-protects-against-paclitaxel-induced-neurotoxicity
#20
Alix F Leblanc, Jason A Sprowl, Paola Alberti, Alessia Chiorazzi, W David Arnold, Alice A Gibson, Kristen W Hong, Marissa S Pioso, Mingqing Chen, Kevin M Huang, Vamsi Chodisetty, Olivia Costa, Tatiana Florea, Peter de Bruijn, Ron H Mathijssen, Raquel E Reinbolt, Maryam B Lustberg, Lara E Sucheston-Campbell, Guido Cavaletti, Alex Sparreboom, Shuiying Hu
Paclitaxel is among the most widely used anticancer drugs and is known to cause a dose-limiting peripheral neurotoxicity, the initiating mechanisms of which remain unknown. Here, we identified the murine solute carrier organic anion-transporting polypeptide B2 (OATP1B2) as a mediator of paclitaxel-induced neurotoxicity. Additionally, using established tests to assess acute and chronic paclitaxel-induced neurotoxicity, we found that genetic or pharmacologic knockout of OATP1B2 protected mice from mechanically induced allodynia, thermal hyperalgesia, and changes in digital maximal action potential amplitudes...
January 16, 2018: Journal of Clinical Investigation
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