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M Hückstädt, G O Hofmann, T Mendel, R Stuttmann, P Hilbert-Carius
BACKGROUND: Sepsis and septic shock are major contributors to morbidity and mortality in intensive care patients. Early identification and adequate therapy are of utmost importance to reduce the still high mortality in patients with severe sepsis. Many of the pathophysiologic changes are nonspecific. Thus, a combination of symptoms and laboratory results are necessary to confirm the diagnosis. Impairment of the Horovitz index is identified as being a primal prognostic criterion for early diagnosis in serious progression of sepsis, after exclusion of a few differential diagnoses...
October 5, 2016: Der Anaesthesist
Ilia Korobko, Michal Nadler-Holly, Amnon Horovitz
The chaperonin-containing t-complex polypeptide 1 (CCT, also known as TRiC) assists protein folding in an ATP-dependent manner. CCT/TRiC was mixed rapidly with different concentrations of ATP, and the amount of phosphate formed upon ATP hydrolysis was measured as a function of time using the coumarin-labeled phosphate-binding protein method. Two burst phases were observed, followed by a lag phase and then a linear steady-state phase of ATP hydrolysis. The phases were assigned by (i) determining their dependence on ATP and K(+) concentrations and (ii) by measuring their sensitivity to the mutation Gly345→Asp in subunit CCT4, which decreases cooperativity in ATP binding...
September 26, 2016: Journal of Molecular Biology
Rinki Saha, Stephanie Knapp, Darpan Chakraborty, Omer Horovitz, Anne Albrecht, Martin Kriebel, Hanoch Kaphzan, Ingrid Ehrlich, Hansjürgen Volkmer, Gal Richter-Levin
Inhibitory synaptic transmission in the amygdala plays a pivotal role in fear learning and its extinction. However, the local circuits formed by GABAergic inhibitory interneurons within the amygdala and their detailed function in shaping these behaviors are not well understood. Here, we employed lentiviral-mediated knockdown of the cell adhesion molecule neurofascin in the basolateral amygdala (BLA) to specifically remove inhibitory synapses at the axon initial segment (AIS) of BLA projection neurons. Quantitative analysis of GABAergic synapse markers and measurement of miniature inhibitory postsynaptic currents in BLA projection neurons after neurofascin knockdown ex vivo confirmed the loss of GABAergic input...
September 16, 2016: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
Eva Morava, Vera Tiemes, Christian Thiel, Nathalie Seta, Pascale de Lonlay, Hans de Klerk, Margot Mulder, Estela Rubio-Gozalbo, Gepke Visser, Peter van Hasselt, Dafne D G Horovitz, Carolina Fischinger Moura de Souza, Ida V D Schwartz, Andrew Green, Mohammed Al-Owain, Graciella Uziel, Sabine Sigaudy, Brigitte Chabrol, Franc-Jan van Spronsen, Martin Steinert, Eleni Komini, Donald Wurm, Andrea Bevot, Addelkarim Ayadi, Karin Huijben, Marli Dercksen, Peter Witters, Jaak Jaeken, Gert Matthijs, Dirk J Lefeber, Ron A Wevers
No abstract text is available yet for this article.
September 2016: Journal of Inherited Metabolic Disease
Cecile Gallea, Silvina G Horovitz, Muslimah 'Ali Najee-Ullah, Mark Hallett
Handwriting with the dominant hand is a highly skilled task singularly acquired in humans. This skill is the isolated deficit in patients with writer's cramp (WC), a form of dystonia with maladaptive plasticity, acquired through intensive and repetitive motor practice. When a skill is highly trained, a motor program is created in the brain to execute the same movement kinematics regardless of the effector used for the task. The task- and effector-specific symptoms in WC suggest that a problem particularly occurs in the brain when the writing motor program is carried out by the dominant hand...
July 28, 2016: Human Brain Mapping
Simone Beuter, Ziv Ardi, Omer Horovitz, Jennifer Wuchter, Stefanie Keller, Rinki Saha, Kuldeep Tripathi, Rachel Anunu, Orli Kehat, Martin Kriebel, Gal Richter-Levin, Hansjürgen Volkmer
Neuronal transmission is regulated by the local circuitry which is composed of principal neurons targeted at different subcellular compartments by a variety of interneurons. However, mechanisms that contribute to the subcellular localisation and maintenance of GABAergic interneuron terminals are poorly understood. Stabilization of GABAergic synapses depends on clustering of the postsynaptic scaffolding protein gephyrin and its interaction with the guanine nucleotide exchange factor collybistin. Lentiviral knockdown experiments in adult rats indicated that the receptor tyrosine kinase EphA7 is required for the stabilisation of basket cell terminals on proximal dendritic and somatic compartments of granular cells of the dentate gyrus...
2016: Scientific Reports
Carine W Maurer, Kathrin LaFaver, Rezvan Ameli, Steven A Epstein, Mark Hallett, Silvina G Horovitz
OBJECTIVE: To investigate the neural mechanisms underlying impaired self-agency in patients with functional movement disorders using resting-state functional MRI (fMRI). METHODS: We obtained resting-state fMRI on 35 patients with clinically definite functional movement disorders and 35 age- and sex-matched healthy controls. Between-group differences in functional connectivity from the right temporo-parietal junction (TPJ), a region previously demonstrated to play a critical role in self-agency by comparing internal predictions of movement with actual external events, were assessed using t tests...
August 9, 2016: Neurology
Dafne Dain Gandelman Horovitz, Marcos Vinicius da Silva Pone, Sheila Moura Pone, Tania Regina Dias Saad Salles, Marcia Cristina Bastos Boechat
No abstract text is available yet for this article.
July 5, 2016: Neurology
Yoseph Horovitz, Osama Tanous, Morad Khayat, Munir Shaker, Stavit Shalev, Ronen Spiegel
AIMS: To determine if familial Mediterranean fever (FMF) genetic testing should be advised in children with initial presentation of monoarthritis and to identify clinical parameters associated with FMF-induced arthritis that warrant genetic investigation. METHODS: A prospective study of 71 otherwise healthy children admitted to our pediatric department between 2010-2013 with a first episode of idiopathic monoarthritis. Demographic, clinical and laboratory data were documented and genetic assay of the five common mutations in our population of the MEFV gene that cause FMF syndrome were analyzed in the entire study population...
June 16, 2016: International Journal of Rheumatic Diseases
Dafne Dain Gandelman Horovitz, Angelina X Acosta, Roberto Giugliani, Anna Hlavatá, Katarína Hlavatá, Michel C Tchan, Anneliese Lopes Barth, Laercio Cardoso, Emília Katiane Embiruçu de Araújo Leão, Ana Carolina Esposito, Sandra Obikawa Kyosen, Carolina Fischinger Moura De Souza, Ana Maria Martins
BACKGROUND: Enzyme replacement therapy (ERT) with laronidase (recombinant human α-L-iduronidase, Aldurazyme®) is indicated for non-neurological signs and symptoms of mucopolysaccharidosis type I (MPS I). The approved laronidase dose regimen is weekly infusions of 0.58mg/kg, however, patients and caregivers may have difficulty complying with the weekly regimen. We examined clinical outcomes, tolerability, compliance, and satisfaction in a series of patients who switched to every other week infusions...
2016: Orphanet Journal of Rare Diseases
Nora Vanegas-Arroyave, Peter M Lauro, Ling Huang, Mark Hallett, Silvina G Horovitz, Kareem A Zaghloul, Codrin Lungu
Deep brain stimulation therapy is an effective symptomatic treatment for Parkinson's disease, yet the precise mechanisms responsible for its therapeutic effects remain unclear. Although the targets of deep brain stimulation are grey matter structures, axonal modulation is known to play an important role in deep brain stimulation's therapeutic mechanism. Several white matter structures in proximity to the subthalamic nucleus have been implicated in the clinical benefits of deep brain stimulation for Parkinson's disease...
April 2016: Brain: a Journal of Neurology
Inna Horovitz, Dror Avisar, Mark A Baker, Rossana Grilli, Luca Lozzi, Daniela Di Camillo, Hadas Mamane
Commercial α-Al2O3 photocatalytic membranes with a pore size of 200 and 800-nm were coated with N-doped TiO2 photocatalytic film using a sol-gel technique for concurrent bottom-up filtration and photocatalytic oxidation. X-ray diffraction confirmed that the deposited N-doped TiO2 films are in the form of anatase with 78-84% coverage of the membrane surface. The concentration of N found by X-ray photoelectron spectroscopy was in the range of 0.3-0.9 atomic percentage. Membrane permeability after coating decreased by 50% and 12% for the 200- and 800-nm membrane substrates, respectively...
June 5, 2016: Journal of Hazardous Materials
Lavinia Schuler-Faccini, Erlane M Ribeiro, Ian M L Feitosa, Dafne D G Horovitz, Denise P Cavalcanti, André Pessoa, Maria Juliana R Doriqui, Joao Ivanildo Neri, Joao Monteiro de Pina Neto, Hector Y C Wanderley, Mirlene Cernach, Antonette S El-Husny, Marcos V S Pone, Cassio L C Serao, Maria Teresa V Sanseverino
In early 2015, an outbreak of Zika virus, a flavivirus transmitted by Aedes mosquitoes, was identified in northeast Brazil, an area where dengue virus was also circulating. By September, reports of an increase in the number of infants born with microcephaly in Zika virus-affected areas began to emerge, and Zika virus RNA was identified in the amniotic fluid of two women whose fetuses had been found to have microcephaly by prenatal ultrasound. The Brazil Ministry of Health (MoH) established a task force to investigate the possible association of microcephaly with Zika virus infection during pregnancy and a registry for incident microcephaly cases (head circumference ≥2 standard deviations [SD] below the mean for sex and gestational age at birth) and pregnancy outcomes among women suspected to have had Zika virus infection during pregnancy...
2016: MMWR. Morbidity and Mortality Weekly Report
A Berman, Talia Horovitz, M Kaim, H Gacitua
The combined temperature-humidity heat stress is estimated in farm animals by indices derived of an index based on human thermal comfort sensation. The latter index consists of temperature and humidity measures that sum to form the temperature-humidity index (THI). The hitherto unknown relative contribution of temperature and humidity to the THI was examined. A temperature-humidity data set (temperature 20-42 °C and relative humidity 10-70 %) was used to assess by regression procedures the relative weights of temperature and humidity in the variance of THI values produced by six commonly used heat stress indices...
January 27, 2016: International Journal of Biometeorology
René Wintjens, Dominique Bozon, Khaldia Belabbas, Félicien MBou, Jean-Philippe Girardet, Patrick Tounian, Mathilde Jolly, Franck Boccara, Ariel Cohen, Alexandra Karsenty, Béatrice Dubern, Jean-Claude Carel, Ahlam Azar-Kolakez, François Feillet, François Labarthe, Anne-Marie Colin Gorsky, Alice Horovitz, Catherine Tamarindi, Pierre Kieffer, Anne Lienhardt, Olivier Lascols, Mathilde Di Filippo, Fabienne Dufernez
Autosomal dominant hypercholesterolemia (ADH) is a human disorder characterized phenotypically by isolated high-cholesterol levels. Mutations in the low density lipoprotein receptor (LDLR), APOB, and proprotein convertase subtilisin/kexin type 9 (PCSK9) genes are well known to be associated with the disease. To characterize the genetic background associated with ADH in France, the three ADH-associated genes were sequenced in a cohort of 120 children and 109 adult patients. Fifty-one percent of the cohort had a possible deleterious variant in LDLR, 3...
March 2016: Journal of Lipid Research
Yonatan Horovitz, Gabor Kosa
Catheters and flexible endoscopes are usually steered by mechanical wires that are driven from their base. Due to friction and buckling there is a need to place the driving actuator of the catheter at the catheter's tip. Such active catheter's manoeuvrability is much higher than wire-driven ones. A problem with active catheters is the difficulty to create high enough bending using micro-actuators placed at the catheter's tip. Our actuation method is an attempt to overcome this difficulty by using a novel thermo-hydraulic actuation method...
2015: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Ranit Gruber, Amnon Horovitz
Chaperonins are nanomachines that facilitate protein folding by undergoing energy (ATP)-dependent movements that are coordinated in time and space owing to complex allosteric regulation. They consist of two back-to-back stacked oligomeric rings with a cavity at each end where protein substrate folding can take place. Here, we focus on the GroEL/GroES chaperonin system from Escherichia coli and, to a lesser extent, on the more poorly characterized eukaryotic chaperonin CCT/TRiC. We describe their various functional (allosteric) states and how they are affected by substrates and allosteric effectors that include ATP, ADP, nonfolded protein substrates, potassium ions, and GroES (in the case of GroEL)...
June 8, 2016: Chemical Reviews
Renato Garcia, Roberto Novaes Campello Horovitz, Andre Augusto Miranda Torricelli, Adriana Mukai, Samir Jacob Bechara
PURPOSE: Postoperative pain remains an important limiting factor to the selection of photorefractive keratectomy (PRK). There is a consensus in neurology pain research that pain should be evaluated as a multidimensional concept, which differs from current practice in ophthalmology. The purpose of this paper was to validate the use of multidimensional questionnaires, such as the Brief Pain Inventory (BPI) and the McGill Pain Questionnaire (MPQ), to provide an improved analysis of pain after PRK and to better describe its temporal profile...
February 2016: Cornea
Peter M Lauro, Nora Vanegas-Arroyave, Ling Huang, Paul A Taylor, Kareem A Zaghloul, Codrin Lungu, Ziad S Saad, Silvina G Horovitz
Deep brain stimulation (DBS) is an effective surgical treatment for movement disorders. Although stimulation sites for movement disorders such as Parkinson's disease are established, the therapeutic mechanisms of DBS remain controversial. Recent research suggests that specific white-matter tract and circuit activation mediates symptom relief. To investigate these questions, we have developed a patient-specific open-source software pipeline called 'DBSproc' for (1) localizing DBS electrodes and contacts from postoperative CT images, (2) processing structural and diffusion MRI data, (3) registering all images to a common space, (4) estimating DBS activation volume from patient-specific voltage and impedance, and (5) understanding the DBS contact-brain connectivity through probabilistic tractography...
January 2016: Human Brain Mapping
Iris Grossman, Haim Yuval Aviram, Gad Armony, Amnon Horovitz, Hagen Hofmann, Gilad Haran, Deborah Fass
The ability to query enzyme molecules individually is transforming our view of catalytic mechanisms. Quiescin sulfhydryl oxidase (QSOX) is a multidomain catalyst of disulfide-bond formation that relays electrons from substrate cysteines through two redox-active sites to molecular oxygen. The chemical steps in electron transfer have been delineated, but the conformational changes accompanying these steps are poorly characterized. Here we use single-molecule Förster resonance energy transfer (smFRET) to probe QSOX conformation in resting and cycling enzyme populations...
2015: Nature Communications
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