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https://www.readbyqxmd.com/read/29149615/rethinking-unconventional-translation-in-neurodegeneration
#1
REVIEW
Fen-Biao Gao, Joel D Richter, Don W Cleveland
Eukaryotic translation is tightly regulated to ensure that protein production occurs at the right time and place. Recent studies on abnormal repeat proteins, especially in age-dependent neurodegenerative diseases caused by nucleotide repeat expansion, have highlighted or identified two forms of unconventional translation initiation: usage of AUG-like sites (near cognates) or repeat-associated non-AUG (RAN) translation. We discuss how repeat proteins may differ due to not just unconventional initiation, but also ribosomal frameshifting and/or imperfect repeat DNA replication, expansion, and repair, and we highlight how research on translation of repeats may uncover insights into the biology of translation and its contribution to disease...
November 16, 2017: Cell
https://www.readbyqxmd.com/read/29149213/optimal-design-and-control-of-an-electromechanical-transfemoral-prosthesis-with-energy-regeneration
#2
Farbod Rohani, Hanz Richter, Antonie J van den Bogert
In this paper, we present the design of an electromechanical above-knee active prosthesis with energy storage and regeneration. The system consists of geared knee and ankle motors, parallel springs for each motor, an ultracapacitor, and controllable four-quadrant power converters. The goal is to maximize the performance of the system by finding optimal controls and design parameters. A model of the system dynamics was developed, and used to solve a combined trajectory and design optimization problem. The objectives of the optimization were to minimize tracking error relative to human joint motions, as well as energy use...
2017: PloS One
https://www.readbyqxmd.com/read/29146922/molecular-definition-of-multiple-sites-of-antibody-inhibition-of-malaria-transmission-blocking-vaccine-antigen-pfs25
#3
Stephen W Scally, Brandon McLeod, Alexandre Bosch, Kazutoyo Miura, Qi Liang, Sean Carroll, Sini Reponen, Ngan Nguyen, Eldar Giladi, Sebastian Rämisch, Vidadi Yusibov, Allan Bradley, Franck Lemiale, William R Schief, Daniel Emerling, Paul Kellam, C Richter King, Jean-Philippe Julien
The Plasmodium falciparum Pfs25 protein (Pfs25) is a leading malaria transmission-blocking vaccine antigen. Pfs25 vaccination is intended to elicit antibodies that inhibit parasite development when ingested by Anopheles mosquitoes during blood meals. The Pfs25 three-dimensional structure has remained elusive, hampering a molecular understanding of its function and limiting immunogen design. We report six crystal structures of Pfs25 in complex with antibodies elicited by immunization via Pfs25 virus-like particles in human immunoglobulin loci transgenic mice...
November 16, 2017: Nature Communications
https://www.readbyqxmd.com/read/29146773/glyoxal-as-an-alternative-fixative-to-formaldehyde-in-immunostaining-and-super-resolution-microscopy
#4
Katharina N Richter, Natalia H Revelo, Katharina J Seitz, Martin S Helm, Deblina Sarkar, Rebecca S Saleeb, Elisa D'Este, Jessica Eberle, Eva Wagner, Christian Vogl, Diana F Lazaro, Frank Richter, Javier Coy-Vergara, Giovanna Coceano, Edward S Boyden, Rory R Duncan, Stefan W Hell, Marcel A Lauterbach, Stephan E Lehnart, Tobias Moser, Tiago Outeiro, Peter Rehling, Blanche Schwappach, Ilaria Testa, Bolek Zapiec, Silvio O Rizzoli
Paraformaldehyde (PFA) is the most commonly used fixative for immunostaining of cells, but has been associated with various problems, ranging from loss of antigenicity to changes in morphology during fixation. We show here that the small dialdehyde glyoxal can successfully replace PFA Despite being less toxic than PFA, and, as most aldehydes, likely usable as a fixative, glyoxal has not yet been systematically tried in modern fluorescence microscopy. Here, we tested and optimized glyoxal fixation and surprisingly found it to be more efficient than PFA-based protocols...
November 16, 2017: EMBO Journal
https://www.readbyqxmd.com/read/29146406/central-nervous-involvement-by-chronic-lymphocytic-leukaemia
#5
Dariusz Szczepanek, Ewa Wąsik-Szczepanek, Agnieszka Szymczyk, Małgorzata Wach, Maria Cioch, Monika Podhorecka, Ewelina Grywalska, Marek Hus
Inclusion of the central nervous system (CNS) in the course of chronic lymphocytic leukaemia (CLL) is rare. At the moment no risk factors or proven treatment methods are known. The disease is described both in its early phase and during its acceleration period, thus it has been suggested that there might be independent mechanisms influencing the development of this condition. As there are no unified diagnostic procedure algorithms each patient needs to be assessed individually. CLL can manifest mostly in elderly people, for whom a possibility of development of neurological disorders with their aetiology different from leukaemia, should also be taken into consideration...
November 1, 2017: Neurologia i Neurochirurgia Polska
https://www.readbyqxmd.com/read/29146284/supervised-learning-techniques-and-their-ability-to-classify-a-change-of-direction-task-strategy-using-kinematic-and-kinetic-features
#6
Chris Richter, Enda King, Eanna Falvey, Andrew Franklyn-Miller
This study examines the ability of commonly used supervised learning techniques to classify the execution of a maximum effort change of direction task into predefined movement pattern as well as the influence of fuzzy executions and the impact of selected features (e.g. peak knee flexion) towards classification accuracy. The experiment utilized kinematic and kinetic data from 323 male subjects with chronic athletic groin pain. All subjects undertook a biomechanical assessment and had been divided previously into 3 different movement strategies in an earlier paper...
October 31, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29145432/evaluating-the-intensity-of-fire-at-the-acheulian-site-of-gesher-benot-ya-aqov-spatial-and-thermoluminescence-analyses
#7
Nira Alperson-Afil, Daniel Richter, Naama Goren-Inbar
This manuscript presents an attempt to evaluate the intensity of fire through spatial patterning and thermoluminescence methodology. Previous studies of Layer II-6 Level 2 at the Acheulian site of Gesher Benot Ya'aqov suggested that hominins differentiated their activities across space, including multiple activities around a hearth reconstructed on the basis of the distribution of burned flint artifacts. A transect of ~4 m was extended from the center of the reconstructed hearth of Level 2 to its periphery in order to examine the intensity of fire...
2017: PloS One
https://www.readbyqxmd.com/read/29143933/long-term-effectiveness-of-tocilizumab-in-patients-with-rheumatoid-arthritis-stratified-by-number-of-previous-treatment-failures-with-biologic-agents-results-from-the-german-rabbit-cohort
#8
Lisa Baganz, Adrian Richter, Jörn Kekow, Arnold Bussmann, Andreas Krause, Carsten Stille, Joachim Listing, Angela Zink, Anja Strangfeld
In Germany, Tocilizumab (TCZ) is used for the treatment of rheumatoid arthritis both in biologic-naïve patients and those with previous failures of biologic disease-modifying antirheumatic drugs (bDMARDs). The long-term effectiveness and retention rates of TCZ in patients with different numbers of prior bDMARD failures has rarely been investigated. We included 885 RA patients in the analyses, enrolled with the start of TCZ between 2009 and 2015 in the German biologics register RABBIT. Patients were stratified according to prior bDMARD failures: no prior bDMARD or 1, 2 or ≥ 3 bDMARD failures...
November 16, 2017: Rheumatology International
https://www.readbyqxmd.com/read/29142037/elevated-psychosocial-stress-at-work-in-patients-with-systemic-lupus-erythematosus-and-rheumatoid-arthritis
#9
Jutta G Richter, Thomas Muth, Jian Li, Ralph Brinks, Gamal Chehab, Tobias Koch, Johannes Siegrist, Peter Angerer, Dörte Huscher, Matthias Schneider
OBJECTIVE: Psychosocial stress at work not only affects the healthy working population, but also workers with chronic diseases. We aimed to investigate the psychosocial work stress levels in patients with systemic lupus erythematosus (SLE) and rheumatoid arthritis (RA). METHODS: A cross-sectional study applied the Effort-Reward Imbalance (ERI) questionnaire - an internationally established instrument that measures work stress - to patients with SLE and RA who were capable of work and to a group of controls without these diseases...
November 15, 2017: Journal of Rheumatology
https://www.readbyqxmd.com/read/29138900/-intergenerational-mobility-and-health-inequalities-in-east-and-west-germany-a-trend-analysis-from-1992-to-2012
#10
Sebastian Günther, Irene Moor, Anja Knöchelmann, Matthias Richter
BACKGROUND: Social mobility processes, i. e. the movement of a person from one social position to another, are central mechanisms for explaining health inequalities. Social differences in health status or behaviour may also change with changes in social status. This article examines the importance of intergenerational mobility, i. e. the rise and fall of social status in relation to parental social position, for subjective health in East and West Germany and whether this relationship has changed over 20 years...
November 14, 2017: Bundesgesundheitsblatt, Gesundheitsforschung, Gesundheitsschutz
https://www.readbyqxmd.com/read/29138320/structural-basis-for-antibody-recognition-of-the-nanp-repeats-in-plasmodium-falciparum-circumsporozoite-protein
#11
David Oyen, Jonathan L Torres, Ulrike Wille-Reece, Christian F Ockenhouse, Daniel Emerling, Jacob Glanville, Wayne Volkmuth, Yevel Flores-Garcia, Fidel Zavala, Andrew B Ward, C Richter King, Ian A Wilson
Acquired resistance against antimalarial drugs has further increased the need for an effective malaria vaccine. The current leading candidate, RTS,S, is a recombinant circumsporozoite protein (CSP)-based vaccine against Plasmodium falciparum that contains 19 NANP repeats followed by a thrombospondin repeat domain. Although RTS,S has undergone extensive clinical testing and has progressed through phase III clinical trials, continued efforts are underway to enhance its efficacy and duration of protection. Here, we determined that two monoclonal antibodies (mAbs 311 and 317), isolated from a recent controlled human malaria infection trial exploring a delayed fractional dose, inhibit parasite development in vivo by at least 97%...
November 14, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29136108/perturbation-of-gabaergic-synapses-at-the-axon-initial-segment-of-basolateral-amygdala-induces-trans-regional-metaplasticity-at-the-medial-prefrontal-cortex
#12
Rinki Saha, Kuldeep Shrivastava, Liang Jing, Rachel Schayek, Mouna Maroun, Martin Kriebel, Hansjürgen Volkmer, Gal Richter-Levin
GABAergic synapses in the basolateral amygdala (BLA) play an important role in fear memory generation. We have previously reported that reduction in GABAergic synapses innervating specifically at the axon initial segment (AIS) of principal neurons of BLA, by neurofascin (NF) knockdown, impairs fear extinction. BLA is bidirectionally connected with the medial prefrontal cortex (mPFC), which is a key region involved in extinction of acquired fear memory. Here, we showed that reducing AIS GABAergic synapses within the BLA leads to impairment of synaptic plasticity in the BLA-mPFC pathway, as well as in the ventral subiculum (vSub)-mPFC pathway, which is independent of BLA involvement...
November 9, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/29131856/examination-of-sarcocystis-spp-of-giant-snakes-from-australia-and-southeast-asia-confirms-presence-of-a-known-pathogen-sarcocystis-nesbitti
#13
Marion Wassermann, Lisa Raisch, Jessica Ann Lyons, Daniel James Deans Natusch, Sarah Richter, Mareike Wirth, Piyarat Preeprem, Yuvaluk Khoprasert, Sulaiman Ginting, Ute Mackenstedt, Thomas Jäkel
We examined Sarcocystis spp. in giant snakes from the Indo-Australian Archipelago and Australia using a combination of morphological (size of sporocyst) and molecular analyses. We amplified by PCR nuclear 18S rDNA from single sporocysts in order to detect mixed infections and unequivocally assign the retrieved sequences to the corresponding parasite stage. Sarcocystis infection was generally high across the study area, with 78 (68%) of 115 examined pythons being infected by one or more Sarcocystis spp. Among 18 randomly chosen, sporocyst-positive samples (11 from Southeast Asia, 7 from Northern Australia) the only Sarcocystis species detected in Southeast Asian snakes was S...
2017: PloS One
https://www.readbyqxmd.com/read/29129303/endoscopic-treatment-of-eosinophilic-esophagitis
#14
REVIEW
Joel E Richter
In eosinophilic esophagitis, the main cause of solid-food dysphagia is tissue remodeling resulting in strictures and narrowed esophagus. Endoscopy and biopsies help to identify the degree of inflammation but often miss the fibrosis. Although initially considered dangerous, esophageal dilation has evolved into an extremely effective and safe treatment in fibrostenotic disease. The key is starting low with small-diameter bougies or balloons, and gradually dilating the esophagus and strictures to 16 to 18 mm. Results in more than 1000 adults and children have shown low rates of complications, especially perforations, and no deaths, but postprocedure chest pain is common...
January 2018: Gastrointestinal Endoscopy Clinics of North America
https://www.readbyqxmd.com/read/29126867/allogeneic-hematopoietic-cell-transplantation-for-richter-syndrome-a-single-center-experience
#15
Mohamed A Kharfan-Dabaja, Ambuj Kumar, Facundo E Stingo, Farhad Khimani, Mohammad Hussaini, Ernesto Ayala, Taiga Nishihori, Bijal Shah, Frederick L Locke, Javier Pinilla-Ibarz, Julio C Chavez
BACKGROUND: Recent studies have shown dismal outcomes when chronic lymphocytic leukemia progresses to Richter syndrome after patients receive ibrutinib, with a median overall survival ranging from 2.6 to 3.5 months. Published data on efficacy of allogeneic hematopoietic cell transplantation in Richter syndrome are limited to single-center case series and registry data. PATIENTS AND METHODS: We evaluated the efficacy of allogeneic transplantation in 10 patients, median age of 63 (range, 50-74) years, allografted at a median of 5 (range, 4-25) months from diagnosis of Richter syndrome...
October 12, 2017: Clinical Lymphoma, Myeloma & Leukemia
https://www.readbyqxmd.com/read/29125141/corrigendum-infrared-light-excites-cells-by-changing-their-electrical-capacitance
#16
Mikhail G Shapiro, Kazuaki Homma, Sebastian Villarreal, Claus-Peter Richter, Francisco Bezanilla
This corrects the article DOI: 10.1038/ncomms1742.
November 10, 2017: Nature Communications
https://www.readbyqxmd.com/read/29123021/a-generic-interface-to-reduce-the-efficiency-stability-cost-gap-of-perovskite-solar-cells
#17
Yi Hou, Xiaoyan Du, Simon Scheiner, David P McMeekin, Zhiping Wang, Ning Li, Manuela S Killian, Haiwei Chen, Moses Richter, Ievgen Levchuk, Nadine Schrenker, Erdmann Spiecker, Tobias Stubhan, Norman A Luechinger, Andreas Hirsch, Patrik Schmuki, Hans-Peter Steinrück, Rainer H Fink, Marcus Halik, Henry J Snaith, Christoph J Brabec
A major bottleneck delaying the further commercialization of thin-film solar cells based on hybrid organohalide lead perovskites is the interface losses in state-of-the-art devices. We present a generic interface architecture that combines solution-processed, reliable, and cost-efficient hole-transporting materials, without compromising efficiency, stability or scalability of perovskite solar cells. Tantalum doped tungsten oxide (Ta-WO x )/conjugated polymer multilayers offer a surprisingly small interface barrier and form quasi-ohmic contacts universally with various scalable conjugated polymers...
November 9, 2017: Science
https://www.readbyqxmd.com/read/29122775/classical-hodgkin-lymphoma-arising-in-a-patient-with-chronic-lymphocytic-leukemia-richter-syndrome
#18
Andrés E Quesada, Sergej Konoplev
No abstract text is available yet for this article.
November 9, 2017: Blood
https://www.readbyqxmd.com/read/29121350/individualized-fsh-dosing-based-on-ovarian-reserve-testing-in-women-starting-ivf-icsi-a-multicentre-trial-and-cost-effectiveness-analysis
#19
Theodora C van Tilborg, Simone C Oudshoorn, Marinus J C Eijkemans, Monique H Mochtar, Ron J T van Golde, Annemieke Hoek, Walter K H Kuchenbecker, Kathrin Fleischer, Jan Peter de Bruin, Henk Groen, Madelon van Wely, Cornelis B Lambalk, Joop S E Laven, Ben Willem J Mol, Frank J M Broekmans, Helen L Torrance
STUDY QUESTION: Is there a difference in live birth rate and/or cost-effectiveness between antral follicle count (AFC)-based individualized FSH dosing or standard FSH dosing in women starting IVF or ICSI treatment? SUMMARY ANSWER: In women initiating IVF/ICSI, AFC-based individualized FSH dosing does not improve live birth rates or reduce costs as compared to a standard FSH dose. WHAT IS KNOWN ALREADY: In IVF or ICSI, ovarian reserve testing is often used to adjust the FSH dose in order to normalize ovarian response and optimize live birth rates...
November 7, 2017: Human Reproduction
https://www.readbyqxmd.com/read/29121326/individualized-versus-standard-fsh-dosing-in-women-starting-ivf-icsi-an-rct-part-1-the-predicted-poor-responder
#20
Theodora C van Tilborg, Helen L Torrance, Simone C Oudshoorn, Marinus J C Eijkemans, Carolien A M Koks, Harold R Verhoeve, Annemiek W Nap, Gabrielle J Scheffer, A Petra Manger, Benedictus C Schoot, Alexander V Sluijmer, Arie Verhoeff, Henk Groen, Joop S E Laven, Ben Willem J Mol, Frank J M Broekmans
STUDY QUESTION: Does an increased FSH dose result in higher cumulative live birth rates in women with a predicted poor ovarian response, apparent from a low antral follicle count (AFC), scheduled for IVF or ICSI? SUMMARY ANSWER: In women with a predicted poor ovarian response (AFC < 11) undergoing IVF/ICSI, an increased FSH dose (225/450 IU/day) does not improve cumulative live birth rates as compared to a standard dose (150 IU/day). WHAT IS KNOWN ALREADY: In women scheduled for IVF/ICSI, an ovarian reserve test (ORT) can predict ovarian response to stimulation...
November 7, 2017: Human Reproduction
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