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https://www.readbyqxmd.com/read/29657294/rare-splice-variants-in-long-non-coding-rnas
#1
Rituparno Sen, Gero Doose, Peter F Stadler
Long non-coding RNAs (lncRNAs) form a substantial component of the transcriptome and are involved in a wide variety of regulatory mechanisms. Compared to protein-coding genes, they are often expressed at low levels and are restricted to a narrow range of cell types or developmental stages. As a consequence, the diversity of their isoforms is still far from being recorded and catalogued in its entirety, and the debate is ongoing about what fraction of non-coding RNAs truly conveys biological function rather than being "junk"...
July 5, 2017: Non-Coding RNA
https://www.readbyqxmd.com/read/29346970/evoking-prescribed-spike-times-in-stochastic-neurons
#2
Jens Doose, Benjamin Lindner
Single cell stimulation in vivo is a powerful tool to investigate the properties of single neurons and their functionality in neural networks. We present a method to determine a cell-specific stimulus that reliably evokes a prescribed spike train with high temporal precision of action potentials. We test the performance of this stimulus in simulations for two different stochastic neuron models. For a broad range of parameters and a neuron firing with intermediate firing rates (20-40 Hz) the reliability in evoking the prescribed spike train is close to its theoretical maximum that is mainly determined by the level of intrinsic noise...
September 2017: Physical Review. E
https://www.readbyqxmd.com/read/29330515/hyphatracker-an-imagej-toolbox-for-time-resolved-analysis-of-spore-germination-in-filamentous-fungi
#3
Michael Brunk, Sebastian Sputh, Sören Doose, Sebastian van de Linde, Ulrich Terpitz
The dynamics of early fungal development and its interference with physiological signals and environmental factors is yet poorly understood. Especially computational analysis tools for the evaluation of the process of early spore germination and germ tube formation are still lacking. For the time-resolved analysis of conidia germination of the filamentous ascomycete Fusarium fujikuroi we developed a straightforward toolbox implemented in ImageJ. It allows for processing of microscopic acquisitions (movies) of conidial germination starting with drift correction and data reduction prior to germling analysis...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/28673533/successful-corpus-callosotomy-for-doose-syndrome
#4
Sotaro Kanai, Tohru Okanishi, Mitsuyo Nishimura, Kentaro Iijima, Takuya Yokota, Tomohiro Yamazoe, Ayataka Fujimoto, Hideo Enoki, Takamichi Yamamoto
Doose syndrome (epilepsy with myoclonic-atonic seizures) is an epilepsy syndrome with an incidence of approximately 1-2% of childhood-onset epilepsies. Although this syndrome is associated with multiple types of generalized seizures, the diagnosis is based on the presence of myoclonic-atonic seizures. Eighteen percent of patients have refractory seizures and intellectual disabilities. There have, however, been a few reports on the efficacy of surgical treatment for Doose syndrome. We describe a case of Doose syndrome in a 10-year-old boy...
June 30, 2017: Brain & Development
https://www.readbyqxmd.com/read/28600632/dynamic-complexity-measures-and-entropy-paths-for-modelling-and-comparison-of-evolution-of-patients-with-drug-resistant-epileptic-encephalopathy-syndromes-drees
#5
Ricardo Zavala-Yoe, Ricardo A Ramirez-Mendoza
Epileptic encephalopathies (EE) is a term coined by the International League Against Epilepsy (ILAE) to refer to a group of epilepsies in which the ictal and interictal abnormalities may contribute to progressive cerebral dysfunction. Among them, two affect mainly children and are very difficult to deal with, Doose and Lennox-Gastaut syndromes, (DS and LGS, respectively). So far (Zavala-Yoe et al., J Integr Neurosci 15(2):205-223, 2015a and works of ours there), quantitative analysis of single case studies of EE have been performed...
June 9, 2017: Metabolic Brain Disease
https://www.readbyqxmd.com/read/28392943/report-from-a-survey-of-parents-regarding-the-use-of-cannabidiol-medicinal-cannabis-in-mexican-children-with-refractory-epilepsy
#6
Carlos G Aguirre-Velázquez
Structured online surveys were used to explore the experiences of the parents of children with refractory epilepsy using medicinal cannabis in Mexico during September 2016. The surveys, which were completed in full, were reviewed, and 53 cases of children aged between 9 months and 18 years were identified. Of these, 43 cases (82%) were from Mexico and 10 (18%) were from Latin American countries. Of the 43 Mexican cases, the diagnoses were as follows: 20 cases (47%) had Lennox-Gastaut syndrome (LGS); 13 cases (30%) had unspecified refractory epilepsy (URE); 8 cases (19%) had West syndrome (WS); 1 case (2%) had Doose syndrome (DS); and 1 case (2%) had Ohtahara syndrome (OS)...
2017: Neurology Research International
https://www.readbyqxmd.com/read/28379629/characterization-of-plasma-membrane-ceramides-by-super-resolution-microscopy
#7
Anne Burgert, Jan Schlegel, Jérôme Bécam, Sören Doose, Erhard Bieberich, Alexandra Schubert-Unkmeir, Markus Sauer
The sphingolipid ceramide regulates cellular processes such as differentiation, proliferation, growth arrest, and apoptosis. Ceramide-rich membrane areas promote structural changes within the plasma membrane that segregate membrane receptors and affect membrane curvature and vesicle formation, fusion, and trafficking. Ceramides were labeled by immunocytochemistry to visualize their distribution on the plasma membrane of different cells with virtually molecular resolution by direct stochastic optical reconstruction microscopy (dSTORM)...
May 22, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28229464/modified-atkins-diet-is-an-effective-treatment-for-children-with-doose-syndrome
#8
Adelheid Wiemer-Kruel, Edda Haberlandt, Hans Hartmann, Gabriele Wohlrab, Thomas Bast
OBJECTIVE: Children with myoclonic astatic epilepsy (MAE; Doose syndrome) whose seizures do not respond immediately to standard antiepileptic drugs (AEDs) are at high risk of developing an epileptic encephalopathy with cognitive decline. A classic ketogenic diet (KD) is a highly effective alternative to AEDs. To date, there are only limited data on the effectiveness of the modified Atkins diet (MAD), which is less restrictive and more compatible with daily life. We report findings from a retrospective study on 30 MAE patients treated with MAD...
April 2017: Epilepsia
https://www.readbyqxmd.com/read/28074834/corrigendum-differential-transcriptional-responses-to-ebola-and-marburg-virus-infection-in-bat-and-human-cells
#9
Martin Hölzer, Verena Krähling, Fabian Amman, Emanuel Barth, Stephan H Bernhart, Victor A O Carmelo, Maximilian Collatz, Gero Doose, Florian Eggenhofer, Jan Ewald, Jörg Fallmann, Lasse M Feldhahn, Markus Fricke, Juliane Gebauer, Andreas J Gruber, Franziska Hufsky, Henrike Indrischek, Sabina Kanton, Jörg Linde, Nelly Mostajo, Roman Ochsenreiter, Konstantin Riege, Lorena Rivarola-Duarte, Abdullah H Sahyoun, Sita J Saunders, Stefan E Seemann, Andrea Tanzer, Bertram Vogel, Stefanie Wehner, Michael T Wolfinger, Rolf Backofen, Jan Gorodkin, Ivo Grosse, Ivo Hofacker, Steve Hoffmann, Christoph Kaleta, Peter F Stadler, Stephan Becker, Manja Marz
No abstract text is available yet for this article.
January 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/27893705/gephyrin-binding-peptides-visualize-postsynaptic-sites-and-modulate-neurotransmission
#10
Hans Michael Maric, Torben Johann Hausrat, Franziska Neubert, Nils Ole Dalby, Sören Doose, Markus Sauer, Matthias Kneussel, Kristian Strømgaard
γ-Aminobutyric acid type A and glycine receptors are the major mediators of fast synaptic inhibition in the human central nervous system and are established drug targets. However, all drugs targeting these receptors bind to the extracellular ligand-binding domain of the receptors, which inherently is associated with perturbation of the basic physiological action. Here we pursue a fundamentally different approach, by instead targeting the intracellular receptor-gephyrin interaction. First, we defined the gephyrin peptide-binding consensus sequence, which facilitated the development of gephyrin super-binding peptides and later effective affinity probes for the isolation of native gephyrin...
February 2017: Nature Chemical Biology
https://www.readbyqxmd.com/read/27876760/changes-of-bivalent-chromatin-coincide-with-increased-expression-of-developmental-genes-in-cancer
#11
Stephan H Bernhart, Helene Kretzmer, Lesca M Holdt, Frank Jühling, Ole Ammerpohl, Anke K Bergmann, Bernd H Northoff, Gero Doose, Reiner Siebert, Peter F Stadler, Steve Hoffmann
Bivalent (poised or paused) chromatin comprises activating and repressing histone modifications at the same location. This combination of epigenetic marks at promoter or enhancer regions keeps genes expressed at low levels but poised for rapid activation. Typically, DNA at bivalent promoters is only lowly methylated in normal cells, but frequently shows elevated methylation levels in cancer samples. Here, we developed a universal classifier built from chromatin data that can identify cancer samples solely from hypermethylation of bivalent chromatin...
November 23, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27866088/is-ketogenic-diet-treatment-hepatotoxic-for-children-with-intractable-epilepsy
#12
Nur Arslan, Orkide Guzel, Engin Kose, Unsal Yılmaz, Pınar Kuyum, Betül Aksoy, Tansel Çalık
PURPOSE: Long-term ketogenic diet (KD) treatment has been shown to induce liver steatosis and gallstone formation in some in vivo and clinical studies. The aim of this retrospective study was to evaluate the hepatic side effects of KD in epileptic children. METHOD: A total of 141 patients (mean age: 7.1±4.1years [2-18 years], 45.4% girls), receiving KD at least one year for intractable epilepsy due to different diagnoses (congenital brain defects, GLUT-1 deficiency, West syndrome, tuberous sclerosis, hypoxic brain injury, etc...
December 2016: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/27798191/noisy-juxtacellular-stimulation-in-vivo-leads-to-reliable-spiking-and-reveals-high-frequency-coding-in-single-neurons
#13
Jens Doose, Guy Doron, Michael Brecht, Benjamin Lindner
Single cells in the motor and somatosensory cortex of rats were stimulated in vivo with broadband fluctuating currents applied juxtacellularly. Unlike the DC current steps used previously, fluctuating stimulation currents reliably evoked spike trains with precise timing of individual spikes. Fluctuating currents resulted in strong cellular responses at stimulation frequencies beyond the inverse membrane time constant and the mean firing rate of the neuron. Neuronal firing was associated with high rates of information transmission, even for the high-frequency components of the stimulus...
October 26, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27773869/valve-in-valve-outcome-design-impact-of-a-pre-existing-bioprosthesis-on-the-hydrodynamics-of-an-edwards-sapien-xt-valve
#14
Christian Doose, Maximilian Kütting, Sandrine Egron, Pejman Farhadi Ghalati, Christoph Schmitz, Marc Utzenrath, Alexander Sedaghat, Buntaro Fujita, Thomas Schmitz-Rode, Stephan Ensminger, Ulrich Steinseifer
Objectives: Bioprosthetic aortic heart valves are increasingly implanted in younger patients. Therefore, a strategy for potential valve failure should be developed before implanting the 'first valve'. The goal of this in vitro study was to provide insight into the effects of the design of a bioprosthesis on a valve-in-valve implanted Sapien XT valve. Methods: The hydrodynamic performance of a 23-mm Sapien XT valve implanted in Vascutek Aspire, Edwards Perimount, Medtronic Mosaic and St...
March 1, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/27746401/preclinical-determination-of-the-best-functional-position-for-transcatheter-heart-valves-implanted-in-rapid-deployment-bioprostheses
#15
Timm Schäfer, Christian Doose, Buntaro Fujita, Marc Utzenrath, Sandrine Egron, Christoph Schmitz, Smita Scholtz, Maximilian Kütting, Kavous Hakim-Meibodi, Jochen Börgermann, Jan Gummert, Ulrich Steinseifer, Stephan Ensminger
AIMS: The aim of this study was to determine the best functional position of a transcatheter heart valve (THV) implanted as a valve-in-valve (ViV) procedure in small rapid deployment valves (RDV) in an in vitro model. METHODS AND RESULTS: A 21 mm Perceval, Enable or INTUITY RDV was mounted into a pulse duplicator and a 23 mm balloon-expandable or a self-expanding THV was deployed (valve-in-valve) in two different positions. Under physiological hydrodynamic conditions, the performance of the THV was characterised by mean transvalvular pressure gradient (MPG), effective orifice area (EOA) and regurgitation volume (RV)...
February 20, 2017: EuroIntervention
https://www.readbyqxmd.com/read/27713552/differential-transcriptional-responses-to-ebola-and-marburg-virus-infection-in-bat-and-human-cells
#16
Martin Hölzer, Verena Krähling, Fabian Amman, Emanuel Barth, Stephan H Bernhart, Victor A O Carmelo, Maximilian Collatz, Gero Doose, Florian Eggenhofer, Jan Ewald, Jörg Fallmann, Lasse M Feldhahn, Markus Fricke, Juliane Gebauer, Andreas J Gruber, Franziska Hufsky, Henrike Indrischek, Sabina Kanton, Jörg Linde, Nelly Mostajo, Roman Ochsenreiter, Konstantin Riege, Lorena Rivarola-Duarte, Abdullah H Sahyoun, Sita J Saunders, Stefan E Seemann, Andrea Tanzer, Bertram Vogel, Stefanie Wehner, Michael T Wolfinger, Rolf Backofen, Jan Gorodkin, Ivo Grosse, Ivo Hofacker, Steve Hoffmann, Christoph Kaleta, Peter F Stadler, Stephan Becker, Manja Marz
The unprecedented outbreak of Ebola in West Africa resulted in over 28,000 cases and 11,000 deaths, underlining the need for a better understanding of the biology of this highly pathogenic virus to develop specific counter strategies. Two filoviruses, the Ebola and Marburg viruses, result in a severe and often fatal infection in humans. However, bats are natural hosts and survive filovirus infections without obvious symptoms. The molecular basis of this striking difference in the response to filovirus infections is not well understood...
October 7, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27668214/super-resolution-imaging-of-plasma-membrane-proteins-with-click-chemistry
#17
Pablo Mateos-Gil, Sebastian Letschert, Sören Doose, Markus Sauer
Besides its function as a passive cell wall, the plasma membrane (PM) serves as a platform for different physiological processes such as signal transduction and cell adhesion, determining the ability of cells to communicate with the exterior, and form tissues. Therefore, the spatial distribution of PM components, and the molecular mechanisms underlying it, have important implications in various biological fields including cell development, neurobiology, and immunology. The existence of confined compartments in the plasma membrane that vary on many length scales from protein multimers to micrometer-size domains with different protein and lipid composition is today beyond all questions...
2016: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/27600546/slc6a1-mutation-and-ketogenic-diet-in-epilepsy-with-myoclonic-atonic-seizures
#18
Samantha Palmer, Meghan C Towne, Phillip L Pearl, Renee C Pelletier, Casie A Genetti, Jiahai Shi, Alan H Beggs, Pankaj B Agrawal, Catherine A Brownstein
BACKGROUND: Epilepsy with myoclonic-atonic seizures, also known as myoclonic-astatic epilepsy or Doose syndrome, has been recently linked to variants in the SLC6A1 gene. Epilepsy with myoclonic-atonic seizures is often refractory to antiepileptic drugs, and the ketogenic diet is known for treating medically intractable seizures, although the mechanism of action is largely unknown. We report a novel SLC6A1 variant in a patient with epilepsy with myoclonic-atonic seizures, analyze its effects, and suggest a mechanism of action for the ketogenic diet...
November 2016: Pediatric Neurology
https://www.readbyqxmd.com/read/27506632/epileptic-spasms-in-epilepsy-with-myoclonic-atonic-seizures-doose-syndrome
#19
Francesca Pittau, Christian M Korff, Douglas R Nordli
AIM: To describe the occurrence of epileptic spasms in epilepsy with myoclonic-atonic seizures (EMAS) or Doose syndrome. METHODS: Case descriptions of patients with EMAS and epileptic spasms. Diagnosis of EMAS was performed according to the following criteria: (1) onset of myoclonic, myoclonic-atonic, or atonic seizures at between 7 months and 6 years of age; (2) normal development before onset of epilepsy; (3) absence of structural cerebral abnormalities on MRI; (4) presence of generalized spike-waves or polyspike-waves on EEG; and (5) exclusion of other myoclonic epilepsies...
September 1, 2016: Epileptic Disorders: International Epilepsy Journal with Videotape
https://www.readbyqxmd.com/read/27345028/entropy-measures-to-study-and-model-long-term-simultaneous-evolution-of-children-in-doose-and-lennox-gastaut-syndromes
#20
Ricardo Zavala-Yoe, Ricardo A Ramirez-Mendoza, Luz M Cordero
Doose and Lennox-Gastaut (syndromes) are rare generalized electroclinical affections of early infancy of variable prognosis which manifest with very diverse kinds of seizures. Very frequently, these types of epilepsy become drug resistant and finding reliable treatment results is very difficult. As a result of this, fighting against these syndromes becomes a long term (or endless) event for the little patient, the neurologist and the parents. A lot of Electroencephalographic (EEG) records are so accumulated during the child's life in order to monitor evolution and correlate it with medications...
June 2016: Journal of Integrative Neuroscience
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